PHOTOMER 4017 (HDDA)

CAS Number: 13048-33-4.
EC Number: 235-921-9.
Molecular Formula: C12H18O4.
Molecular Weight: 226.27 g/mol.
INCI Name: Not established for this industrial trade grade; no cosmetic suitability is implied.
E Number / INS Number: Not applicable.
Boiling Point: Not reliably established for the supplied commercial grade; no verified atmospheric-pressure grade specification.
Melting Point: Not reliably established for the grade; the published sheet warns of cold-induced crystallization or stratification.
Viscosity: 5-10 mPa.s dynamic viscosity at 25 degrees Celsius, Brookfield ISO 2555 (published 2016 grade data); typical website value 8 mPa.s at 25 degrees Celsius.
Density: 1.010-1.030 g/cm3 at 25 degrees Celsius (published grade range).

COMMON PRODUCT AND CHEMICAL NAMES

PHOTOMER 4017
HDDA
1,6-Hexanediol diacrylate
Hexane-1,6-diol diacrylate
Hexamethylene diacrylate
1,6-Hexamethylene diacrylate
Hexane-1,6-diyl diacrylate
1,6-Bis(acryloyloxy)hexane
2-Propenoic acid, 1,6-hexanediyl ester

PHOTOMER 4017 is a trade-grade designation for HDDA, not an independent chemical identity with a different CAS number. The generic names above designate the same molecular substance, whereas grades sold under other trademarks may differ in inhibitor levels, color, acidity, impurities and commercial documentation. The abbreviation HDDA must also be distinguished from ethoxylated hexanediol diacrylates, polyethylene glycol diacrylates, 1,6-hexanediol itself and methacrylate derivatives.

WHAT IS PHOTOMER 4017 (HDDA)?

PHOTOMER 4017 is a difunctional acrylate monomer used as a reactive diluent in radiation-curable organic formulations. A reactive diluent performs two roles that should be evaluated separately: it reduces the viscosity of the uncured formulation, and it participates chemically in building the polymer network rather than being intentionally removed by evaporation. This is a fundamental difference from an ordinary organic solvent.

PHOTOMER 4017 (HDDA) is especially relevant when high-molecular-weight oligomers provide desirable mechanical or chemical properties but are too viscous to apply efficiently on their own. A small, mobile molecule such as HDDA can help create a workable liquid blend while retaining curing capability. The resulting cured network can display useful abrasion, water and chemical resistance, though each property is determined by the complete formulation, substrate and conversion achieved.

The current PHOTOMER 4017 (HDDA) listing identifies HDDA, CAS 13048-33-4, as the active chemistry and reports a typical viscosity of 8 mPa.s at 25 degrees Celsius, with functionality two. A published product data sheet, issue 09/05/2016 and version 007, provides a wider typical viscosity range and specific quality parameters; these figures should be identified as historical documented grade data, not as an independently guaranteed specification for a present shipment.

UV curing generally requires an appropriate photoinitiator or initiating system selected for the available light source, coating thickness and pigments. EB curing can generate reactive species directly through the incident beam, so photoinitiators are often unnecessary in the same way, although process design remains important. PHOTOMER 4017 is neither a photoinitiator nor a finished UV-curable resin system by itself.

CAS NUMBER, EC / EINECS NUMBER AND CHEMICAL IDENTIFICATION

Main Product Designation: PHOTOMER 4017 (HDDA)
Principal Chemical Name: 1,6-Hexanediol diacrylate
CAS Number: 13048-33-4
EC / EINECS Number: 235-921-9
EU CLP Index Number: 607-109-00-8
Molecular Formula: C12H18O4
Molar Mass: 226.27 g/mol
Molecular Functionality: Two acrylate double bonds per molecule
Chemical Family: Difunctional aliphatic acrylate ester
Condensed Structural Formula: CH2=CH-C(=O)-O-(CH2)6-O-C(=O)-CH=CH2
Canonical SMILES: C=CC(=O)OCCCCCCOC(=O)C=C
Appearance of Commercial Grade: Clear liquid
Primary Industrial Functions: Reactive viscosity reducer; copolymerizable crosslinking comonomer

The CAS number identifies the underlying hexanediol diacrylate substance. It does not disclose the exact stabilizer chemistry, analytical purity, inhibitor concentration or permitted use of a given commercial lot. Some acrylate monomers are sold with stabilizers to prevent premature polymerization, and such differences can affect long-term handling and cure response.

The generic molecule and the marketed PHOTOMER 4017 grade must not be confused with the polymer formed after curing. The resulting three-dimensional polymer network does not retain the same small-molecule identity, molecular formula or simple molecular-weight value. Similarly, using HDDA as one ingredient in an ink or adhesive does not make the entire blend chemically equivalent to neat HDDA.

CHEMICAL STRUCTURE AND MOLECULAR CHARACTERISTICS

A molecule of 1,6-hexanediol diacrylate contains two acrylic acid ester groups linked to the ends of a six-methylene aliphatic spacer. Each terminal acrylate group contains a carbon-carbon double bond adjacent to a carbonyl group. This combination allows radical addition reactions and subsequent propagation under appropriate initiation conditions.

Because HDDA is bifunctional, it can join different growing chains, increasing the connectivity of the cured material. The chemical process is more complex than an assumption that every molecule always forms exactly two successful network connections: local conversion, cyclization, chain termination, diffusion restrictions and unreacted groups influence real network architecture. Formulators therefore evaluate gel formation and final conversion rather than calculating performance from nominal functionality alone.

The six-carbon spacer is relatively flexible compared with rigid aromatic linkers. It can support film properties that differ from those of shorter-chain or more highly functional acrylate monomers, but the final network may still be stiff or brittle when high crosslink density, resin composition or curing conditions favor those outcomes. Flexibility, hardness and adhesion should be measured in actual cured films.

HDDA contains ester groups but no ionic groups, so it is not inherently a surfactant or a water-soluble salt. Its organic character contributes to compatibility with many acrylate oligomers, while its limited aqueous solubility means it is not a drop-in monomer for purely aqueous systems without deliberate emulsification, dispersion or other formulation design.

The structural formula of PHOTOMER 4017 (HDDA) contains carbon, hydrogen and oxygen only. Consequently, combustion and ordinary thermal oxidative breakdown of the pure molecule are not reasonably described as inherently generating nitrogen- or chlorine-containing gases unless additional formulation components supply those elements. Fire hazards and decomposition products still require examination of the actual mixture.

PHYSICAL AND CHEMICAL PROPERTIES

Physical Form: Liquid at normal working temperatures, subject to low-temperature behavior.
Appearance: Clean, clear liquid (published PHOTOMER 4017 product data sheet).
Color: APHA / Hazen color 60 maximum (published grade typical limit).
Molecular Weight: 226.27 g/mol for the HDDA molecule.
Dynamic Viscosity at 25 degrees Celsius: 5-10 mPa.s, Brookfield according to ISO 2555, in the published 2016 PHOTOMER 4017 data sheet.
Typical Product-Listing Viscosity: 8 mPa.s at 25 degrees Celsius; this is a typical point value rather than an additional guaranteed limit.
Specific Gravity / Density at 25 degrees Celsius: Published grade range 1.010-1.030 g/cm3, reported under the heading specific gravity in the technical sheet. The numerical g/cm3 values are density units, so they are stated here with that clarification.
Refractive Index at 25 degrees Celsius: 1.4530-1.4570, published product range.
Acid Value: 0.2 mg KOH/g maximum in the published product sheet.
Moisture Content: 0.2% maximum, Karl Fischer method referenced as ISO 4317 in the published product sheet.
Inhibitor Content: 100-500 ppm by GC analysis in the published product sheet; actual inhibitor identity and current specification require the current product documentation.
Residual Solvent Content: 1000 ppm maximum by GC analysis in the published product sheet.
Acrylate Functionality: 2.
Melting / Freezing Point: Not reliably established as one fixed grade value; substance references differ, and the product sheet warns of crystallization or stratification under cold or freezing conditions.
Boiling Point: Not reliably established as a meaningful atmospheric-pressure grade specification from the published PHOTOMER 4017 sheet; reported HDDA values across substance references are not sufficiently consistent to treat as a guaranteed commercial boiling point.
Flash Point: A substance-level safety reference reports greater than 200 degrees Fahrenheit (greater than about 93 degrees Celsius); the exact test method and current PHOTOMER 4017 batch value are not established here, so consult the current SDS.
Water Solubility: Limited; a chemical emergency reference reports less than 0.1 mg/mL at 18 degrees Celsius for the substance, not a universal formulation miscibility limit.
Vapor Pressure: Low relative to many volatile application solvents; grade-specific value and measurement basis should be taken from the current SDS.
pH: Not applicable as a meaningful intrinsic property of the neat nonaqueous monomer.
Shelf Life: The published 2016 data sheet states stability for at least 12 months under its specified cool, dry, light-protected storage conditions; confirm current labeled shelf life, container conditions and retest policy with the supplier.

These values require careful interpretation. The published 2016 product sheet presents typical technical information and historical commercial limits rather than a batch-specific certificate of analysis. Current specifications can change, and neither the original technical sheet nor unrelated HDDA grades establish specifications for every shipment supplied through a distributor.

A low viscosity is particularly valuable for process control, but viscosity is temperature-sensitive and strongly dependent on the rest of a formulation. A reported value for neat PHOTOMER 4017 cannot predict the viscosity of a mixture containing high-viscosity oligomers, photoinitiators, pigments, fillers or additives. Brookfield spindle, shear regime and instrument conditions should be documented when comparing complex mixtures.

The acid value is an indicator of titratable acidic constituents, not the pH of the neat organic monomer. Excess acidity may indicate changes in chemical quality or contribute to incompatibility in selected formulations. Moisture, residual solvent, inhibitor and color values can likewise affect purchasing decisions, although they do not by themselves establish final coating performance.

Low-temperature crystallization or stratification requires particular care. The published sheet indicates allowing PHOTOMER 4017 (HDDA) to return to room temperature and mixing thoroughly before use after exposure to cold; this instruction should be applied only in a controlled manner consistent with the current SDS and without external heating that could promote undesired polymerization.

HOW DOES PHOTOMER 4017 (HDDA) WORK AT THE MOLECULAR LEVEL?

In the liquid formulation, HDDA reduces resistance to flow by acting as a small-molecule component among larger resin and oligomer species. Its compatibility with many urethane-acrylate and epoxy-acrylate oligomers is specifically highlighted in published product information. Lowering mixture viscosity may improve coating transfer, leveling, pigment incorporation and application consistency, although the magnitude depends on composition.

During UV curing, absorbed light activates a selected photoinitiator, which forms reactive species that can add to acrylate carbon-carbon double bonds. The resulting chain radicals add to additional acrylate molecules, including both ends of HDDA, and the growing system develops branching and crosslinks. The coating changes from a flowing liquid into a solid or semisolid polymer network as conversion and connectivity increase.

Under electron-beam curing, energy deposited by the beam can initiate polymerization directly, reducing reliance on light-absorbing photoinitiators. The beam energy, dose, oxygen exposure, layer thickness and formulation composition still determine whether the targeted conversion and properties are obtained. EB curing is not automatically suitable for every substrate or plant installation.

Oxygen present at the surface can intercept reactive radicals and slow the apparent cure of acrylate systems, especially under some UV exposure conditions. This phenomenon can produce a tacky surface even when deeper portions are substantially cured. Measures to improve surface cure must be selected for the actual line and may involve initiator chemistry, light delivery, atmospheric control or other formulation adjustments; there is no universally valid process setting.

Difunctional structure explains why HDDA affects crosslink density and hardness as well as viscosity. However, increasing its proportion can also affect shrinkage, stress, adhesion and flexibility, so a fast cure or lower viscosity does not guarantee better overall performance. Conversion, soluble extractables, film properties and substrate adhesion should be measured together.

Polymerization also releases heat. High monomer concentrations, uncontrolled initiation, contamination or heat exposure can create a risk of unintended exothermic reactions, which is why inhibitor management, clean transfer equipment and appropriate storage conditions are important. Photoinitiator choice and cure optimization belong in controlled laboratory evaluation rather than in generic recipes.

UV, LED-UV AND ELECTRON-BEAM CURING: IMPORTANT DIFFERENCES

UV curing uses electromagnetic radiation absorbed by the initiating system to start polymerization. It is useful for fast coating and printing processes, but wavelength, irradiance, accumulated energy, optical absorption and oxygen inhibition determine whether the reactive film reaches the desired conversion. A UV-curable formula does not automatically cure efficiently under every UV-LED source.

LED-UV processes use comparatively narrow spectral distributions. When an HDDA-containing system is converted from a broader-spectrum lamp to LEDs, the photoinitiator package and light penetration may require redevelopment; HDDA is the reactive monomer rather than the photoinitiator that establishes spectral sensitivity. Pigments, especially opaque or strongly absorbing ones, add to the challenge.

EB curing can be useful for selected industrial coatings and inks because electron irradiation can induce polymerization without a conventional photoinitiator. Equipment cost, radiation safety, oxygen control, substrate suitability, product thickness and regulatory conditions must be assessed before choosing it.

Thermal free-radical polymerization of HDDA is chemically possible, but PHOTOMER 4017 is principally described for radiation curing. No general thermal cure temperature, initiator loading, processing time or guaranteed conversion should be inferred from the commercial product name alone.

WHICH INDUSTRIES USE PHOTOMER 4017 (HDDA)?

Documentation for PHOTOMER 4017 (HDDA) identifies graphics arts, wood coatings, plastic coatings, metal coatings, electronics, adhesives and inkjet as application areas. The published sheet also names paper and board coatings, wood finishes, vinyl flooring and flexible vinyl; coating, ink and adhesive formulations for paper, wood, metal, plastic and glass are additionally mentioned as possibilities after adequate testing.

The common technical theme is not a specific factory process but the need for a low-viscosity, curable organic liquid that can be combined with oligomers and other reactive ingredients. Each sector has different demands for adhesion, abrasion resistance, cure depth, weathering, chemical resistance, printing behavior and residual monomer.

In practice, qualification is most rigorous where the coated surface experiences food contact, prolonged skin contact, electrical service, optical requirements or demanding environmental exposure. A generic statement that HDDA can be used in a sector does not constitute approval for a particular article, claim, market or device.

PHOTOMER 4017 IN UV-CURABLE COATINGS

In energy-curable coatings, HDDA can reduce the viscosity of the binder package so that application becomes more practical without adding a conventional evaporating solvent for that function. This can support the use of higher-viscosity oligomers that contribute to the eventual film's performance. The sheet specifically identifies satisfactory solvency characteristics with urethane and epoxy oligomers.

The two acrylic double bonds give HDDA the ability to form part of the network during curing. This can support abrasion and chemical resistance in suitable formulations, but performance must be balanced against cure shrinkage and internal stress. The published product sheet describes a moderate shrinkage profile and cites good flexibility, adhesion, leveling and weatherability in appropriate systems; these are formulation-dependent features rather than guaranteed standalone test results.

A coating manufacturer normally considers substrate wetting, wet-film appearance, cure speed and durability as linked objectives. Reducing viscosity may aid leveling but can also change sagging, edge coverage, application weight and pigment distribution. More reactive diluent can raise the proportion of small molecules available for network formation, yet the desired mechanical properties depend on the main resin and initiator system.

The curing stage should be evaluated using appropriate adhesion tests, solvent rub or chemical resistance testing, abrasion methods, gloss or haze measurements and residual-tack observations. Cure adequacy should be tested at the actual line speed, film thickness and light delivery rather than extrapolated from a laboratory sample cured under unrelated conditions.

PHOTOMER 4017 IN WOOD COATINGS AND FLOOR FINISHES

Wood finishes are an explicitly described application for PHOTOMER 4017. PHOTOMER 4017 (HDDA) can help reduce viscosity in UV-curable wood coating formulations, facilitating controlled spreading and wetting when used with compatible oligomer resins. The cured system may be developed for resistance to handling, abrasion, moisture and household chemicals, subject to the whole formulation.

Wood substrates vary substantially in porosity, extractive content, grain, moisture and sanding history. These variables can influence liquid penetration, intercoat adhesion and the apparent finish after curing. A reactive diluent that works on one wood species or sealed surface may require adjustment on another.

Floor coatings face particular combinations of scratching, abrasion, stain exposure and repeated cleaning. The manufacturer's sheet mentions vinyl flooring and flexible vinyl as areas of use, but compatibility with a given flexible substrate and the retention of flexural performance must be demonstrated. A highly crosslinked film can lose useful flexibility if the formulation is not balanced for movement of the underlying substrate.

For wood and flooring applications, relevant evaluation includes wear behavior, yellowing, chemical spot resistance, surface friction where relevant, adhesion after aging and appearance under actual service conditions. Claims such as specific pencil hardness, abrasion cycles or outdoor lifetime should not be assigned to PHOTOMER 4017 without corresponding tested formulations.

PHOTOMER 4017 IN PRINTING INKS AND OVERPRINT VARNISHES

A low-viscosity difunctional monomer can be valuable in UV or EB ink vehicles by helping adjust flow, transfer and wet-film formation. PHOTOMER 4017 is identified for pigmented coatings and graphic arts, and the product website includes inkjet among its application categories. These statements support technical suitability for evaluation; they do not provide a validated inkjet formulation or guarantee printhead compatibility.

Pigmented inks add optical and rheological constraints. Pigment absorption and scattering can limit UV penetration, so cure through a dark or heavily loaded film may differ from cure of a clear varnish. Dispersants, oligomer selection and pigment surface chemistry can also change viscosity even at equal HDDA content.

Overprint varnishes require attention to rub resistance, gloss, surface tack, adhesion to the printed ink and resistance to blocking or offset. In low-migration or food-packaging work, the presence of an acrylate monomer creates an additional need to consider residual content, extractables and potential transfer through packaging structures. No general food-contact clearance, migration limit or absence of migration can be inferred from the grade name.

Inkjet formulations impose exceptionally strict requirements for fluid properties and printhead reliability. Particle contamination, viscosity at the printhead's operating temperature, surface tension, evaporation or deposits, cure response and compatibility with hardware must all be reviewed. The published HDDA viscosity alone does not establish suitability for any particular inkjet head.

PHOTOMER 4017 IN PLASTIC COATINGS AND FLEXIBLE VINYL

Plastic surfaces often have low surface energy, additives or mold-release residues that complicate adhesion. HDDA may aid the application viscosity and crosslinking response of selected plastic-coating systems, but it does not independently solve substrate surface treatment problems. Primers, pretreatment, binder design and environmental conditioning may remain necessary.

The technical sheet for PHOTOMER 4017 (HDDA) refers to flexible vinyl and vinyl flooring applications. This does not guarantee satisfactory flexibility or chemical resistance on all plasticized substrates. Plasticizer migration, residual stresses, coating thickness and differences in thermal expansion can affect long-term adhesion and film appearance.

For flexible applications, crosslink density must be chosen with particular care. Changes that increase solvent or scratch resistance may reduce elongation, so flex testing, mandrel bend or other relevant deformation tests should accompany chemical resistance measurements. UV exposure should also be assessed for effects on color or appearance when an article is intended for exterior use.

PHOTOMER 4017 IN METAL AND GLASS COATINGS

Metal and glass are listed among substrates for which UV-curable coating, ink or adhesive formulations using PHOTOMER 4017 may be evaluated. Their surface chemistries differ greatly from wood or plastic, so acceptable adhesion requires attention to cleanliness, oxidation state, primers, coupling chemistry and coating formulation.

On metals, corrosion resistance is generally a property of the whole protective system, including pretreatment, barrier performance and coating continuity. HDDA can help formulate a low-viscosity reactive binder, but the presence of HDDA does not itself establish corrosion protection or adhesion to a particular alloy.

Glass presents a hard, smooth and chemically distinct interface that may require tailored adhesion promotion. Cure shrinkage can generate interface stresses, particularly in rigid or thick systems. Glass-coating and glass-adhesive validation should include adhesion under humidity, thermal cycling and other conditions specific to the article.

PHOTOMER 4017 IN ADHESIVES, LAMINATES AND SEALANTS

HDDA is a reactive component for consideration in UV-curable adhesive formulations based on acrylate chemistry. It can lower the viscosity of a more viscous binder and contribute crosslinking during cure. The resulting bond strength, tack and flexibility are controlled by the total composition, interface, cure delivery and geometry rather than by HDDA alone.

A liquid adhesive may need enough time to wet two surfaces before the applied energy initiates curing. Low viscosity can support wetting but may also encourage excessive flow or penetration into porous materials. Cure through an opaque adherend may be limited when the process relies on UV light, and alternate cure design may be required.

Flexible laminates call for a different stress balance than rigid assembly adhesives. Excessive shrinkage or network stiffness can lead to warpage, interfacial stress or reduced peel performance, so bondline behavior and residual monomer should be evaluated in realistic test assemblies. No universal HDDA loading or cure schedule is established by the supplier's general product description.

For pressure-sensitive adhesives, the desired tack and peel behavior often depends on a low glass-transition-temperature polymer matrix and carefully controlled crosslinking. HDDA may be considered as a crosslinking comonomer in some systems, but it should not be described as a ready-to-use pressure-sensitive adhesive or a guaranteed way to improve every adhesive property.

PHOTOMER 4017 IN ELECTRONICS, PHOTORESISTS AND SOLDER MASKS

The published technical sheet states that photoresists and solder masks may offer opportunities for PHOTOMER 4017, subject to adequate testing. This is more limited than an established approval for electronics manufacturing, so it should be treated as a possible formulation area requiring qualification.

Electronics coatings can require controlled viscosity for fine features, good cure resolution, adhesion to substrates and compatibility with subsequent processing. Residual ionic contamination, shrinkage stress, moisture resistance and thermal cycling may be significant; a generic monomer data sheet does not establish electrical performance, dielectric properties or ionic purity.

When working with photoimageable systems, the interaction among oligomer structure, HDDA content, exposure conditions and development chemistry matters. Resolution and adhesion can be affected by crosslinking kinetics and conversion through the depth of the film. Qualification should use production-representative exposures, etchants or developers, soldering conditions where applicable and acceptance criteria defined by the electronics process.

PHOTOMER 4017 IN ADDITIVE MANUFACTURING AND OTHER RESEARCH SYSTEMS

Difunctional acrylates including HDDA are widely studied as reactive network-forming ingredients in photopolymer formulations, including some additive manufacturing and patterned polymer systems. Such work is consistent with HDDA's chemistry, but it is not equivalent to a manufacturer-validated 3D-printing formulation for PHOTOMER 4017.

For a photopolymer printing resin, liquid viscosity, light absorption, cure depth, shrinkage, mechanical properties and removal of uncured material all matter. PHOTOMER 4017 (HDDA) can influence these variables, but cured-part biocompatibility, low extractables or suitability for skin-contact or medical articles cannot be assumed from chemical identity.

Laboratory polymer networks and composites may use HDDA to study crosslinking, film formation and interactions with resins or fillers. Results from small specimens cannot be used as guarantees of industrial line-speed performance without testing at the intended geometry and curing energy.

INDUSTRIAL APPLICATIONS AND PERFORMANCE

PHOTOMER 4017 contributes to performance in two different phases of production. Before cure, its main demonstrated value lies in low viscosity and solvency for suitable high-viscosity resin systems; after cure, its polymerizable groups help develop the crosslinked structure that can support protective film properties.

A lower-viscosity formulation may allow changes in pumping, coating transfer, substrate wetting or application consistency, yet such benefits depend on the equipment and chemistry. The viscosity effect must be evaluated across a temperature range and, for filled or pigmented systems, under the appropriate shear conditions.

After curing, important measurements may include double-bond conversion, residual tack, hardness, abrasion resistance, flexibility, crosshatch or peel adhesion, solvent resistance and weathering performance. No single test can establish complete performance. A coating can pass a hardness test while failing on adhesion or flexibility, or appear cured at the surface while retaining monomer deeper in a pigmented layer.

The PHOTOMER 4017 (HDDA) data sheet describes good leveling and weatherability and a moderate shrinkage profile for suitable applications. Without details of a particular test method, resin blend, film thickness or exposure protocol, these descriptors should be treated as qualitative supplier guidance rather than numerical performance guarantees.

WHAT PROBLEMS CAN PHOTOMER 4017 HELP ADDRESS?

A common formulation problem is that an oligomer blend has desirable cured-film characteristics but is too thick for controlled application. HDDA can help lower the mixture viscosity without relying exclusively on conventional volatile solvents. That can be useful for equipment handling and for developing energy-curable systems with appropriate composition.

Another problem is insufficient ability to develop a connected polymer network from a predominantly monofunctional monomer mixture. A difunctional component can contribute additional network junction opportunities, potentially improving certain aspects of cure response or resistance. This must be balanced against brittleness or stresses caused by excessive crosslinking.

Some formulas exhibit poor leveling or inadequate wetting because of their overall rheology. Incorporating a low-viscosity compatible monomer may contribute to improved application behavior, but surface tension and substrate energy remain important. HDDA is not a dedicated silicone leveling agent, wetting surfactant or dispersion stabilizer.

Problems that PHOTOMER 4017 cannot be presumed to solve include poorly selected photoinitiators, inadequate UV penetration, oxygen inhibition, incompatible substrates, contamination, insufficient lamp energy or unrealistic performance specifications. PHOTOMER 4017 (HDDA) is one component of a complete curable chemistry and should be evaluated alongside the other factors.

IMPORTANT CONSIDERATIONS WHEN USING PHOTOMER 4017

Reactive Diluents versus Volatile Solvents: HDDA remains chemically available for incorporation into the cured structure and should not be evaluated solely on the basis of the evaporation characteristics of conventional solvents. The absence of intentional solvent evaporation does not eliminate the possibility of airborne exposure to aerosols, mist or unreacted ingredients.

Cure Shrinkage and Internal Stress: Conversion of reactive double bonds to a crosslinked network is associated with volume changes. The published sheet describes moderate shrinkage, but the exact value and its consequences depend on formulation and conversion. Shrinkage-related stress can affect flatness, adhesion, crack formation and lamination quality.

Skin Sensitization: HDDA has harmonized EU classifications for skin irritation, eye irritation and skin sensitization. Repeated skin contact can be particularly serious for sensitized workers, so splash avoidance, protective equipment, hygiene and safe transfer methods are essential.

Inhibition and Storage Stability: The published specification for PHOTOMER 4017 (HDDA) includes 100-500 ppm of inhibitor. Such inhibitors limit undesired polymerization during handling, and the exact chemistry and oxygen or packaging requirements must be checked in the supplier documentation. Do not remove inhibitors or alter the container atmosphere on the assumption that uninhibited monomer will perform better.

Substrate Compatibility: Solvency for a resin is not proof of suitability on a given plastic, paint layer, adhesive interface or primer. Appearance changes, swelling, stress cracking and adhesion defects must be tested on real substrates.

Migration and Residual Monomer: For packaging or other applications with exposure considerations, degree of cure and remaining unreacted monomer are critical. Product identity, inclusion in a formulation and regulatory inventory status do not themselves demonstrate compliance of the finished article.

FORMULATION DEVELOPMENT AND VALIDATION APPROACH

For a new UV-curable coating or ink, initial laboratory evaluation should begin with a suitable, documented acrylate oligomer system and a clearly defined application target. The formulator can assess whether adding PHOTOMER 4017 produces an acceptable viscosity while preserving the desired solids composition and reducing the need for volatile diluents. The published product data do not supply a validated universal percentage, so no starting loading is prescribed here.

After confirming liquid-phase compatibility and stability, a laboratory program can study curing with a photoinitiator or other initiating system selected for the specific radiation source. Sample film thickness, pigment loading, oxygen exposure and line speed must be recorded because results cannot be compared reliably without these conditions. Cure should be confirmed by suitable conversion and performance tests rather than by the surface feeling dry.

A responsible formulation trial records uncured viscosity as a function of temperature, coating weight or thickness, wetting, substrate appearance, and any phase separation or crystallization. It should also follow stability over the intended storage period, since inhibitors, catalysts, contaminants and light exposure can influence reactive acrylate mixtures.

Cured-film validation should cover the customer's actual priorities: abrasion resistance, adhesion, gloss, flexibility, yellowing, chemical exposure or other service conditions. Comparing HDDA-containing systems with an otherwise relevant control helps separate changes due to monomer selection from changes due to the overall formulation.

For food-contact packaging, medical devices, optical electronics or other highly regulated goods, the validation program requires additional suitability assessment. No recipe, regulatory approval, curing window or safety claim for those products is established by the general PHOTOMER 4017 product literature.

PHOTOMER 4017 COMPARED WITH OTHER REACTIVE DILUENTS

Monofunctional Acrylates: A monofunctional monomer provides one acrylate double bond per molecule, whereas HDDA has two. This difference may affect network connectivity, viscosity and final flexibility, but no universal ranking of adhesion or toughness follows without knowing the structures involved.

Shorter-Chain Diacrylates: Changes in spacer length can change molecular mobility, volatility tendencies, cure behavior and network characteristics. Substitution with a shorter-chain diacrylate should be accompanied by checks of viscosity, shrinkage, resistance and compatibility rather than assumed equivalent on the basis of equal functionality.

Longer-Chain or Alkoxylated Diacrylates: Diacrylates with different linkers, including ethoxylated variants, can offer different polarity, water affinity and mechanical behavior. Ethoxylated hexanediol diacrylates are chemically distinct substances and must not be labeled PHOTOMER 4017 or assigned CAS 13048-33-4.

Highly Functional Acrylates: Triacrylates and higher-functional monomers can contribute more reactive groups per molecule and may create more densely connected networks in suitable formulations. Potential gains in resistance or cure response may come with increased shrinkage or reduced flexibility, so direct substitution is seldom performance-neutral.

Methacrylate Analogs: A methacrylate ester is not simply a different marketing name for an acrylate ester. The additional methyl substituent at the reactive double bond changes polymerization behavior, and a methacrylate formulation may require different initiators, curing conditions and performance testing.

Nonreactive Solvents: A conventional solvent can reduce viscosity but is generally intended to evaporate rather than become part of the cured network. The distinction affects volatile emissions, drying operations, film formation and residual content. Neither option is automatically more suitable without regard to processing and product requirements.

INITIAL FORMULATION APPROACHES FOR PHOTOMER 4017 HDDA

The following examples illustrate how PHOTOMER 4017 HDDA can be evaluated during formulation and process development. These are proposed laboratory starting approaches, not validated commercial recipes, production instructions or regulatory-compliant final formulations.

PHOTOMER 4017 is an HDDA grade: 1,6-hexanediol diacrylate, CAS 13048-33-4. IGM Resins identifies it as a difunctional, low-viscosity diluent for UV/EB-curable systems, including clear and pigmented coatings, and lists adhesive applications. [1] HDDA participates in acrylate curing; it should not be treated as a non-reactive solvent that simply evaporates.

All percentages below are by weight of the complete trial mixture and refer to raw materials as supplied. The numerical levels are illustrative screening proposals, not IGM Resins dosage recommendations. Each composition totals 100%. Use undiluted oligomer grades for these comparisons, or recalculate any monomers already present in supplied oligomer blends. Confirm current specifications, inhibitor information and Safety Data Sheets before work.

The examples concern UV curing. Select the photoinitiator package for the lamp spectrum, film thickness and formulation, and verify that its proposed loading is suitable. Establish a workable exposure window before comparing compositions. Keep measured irradiance, radiant exposure, lamp spectrum, atmosphere and film thickness constant within each initial series. UV-LED, mercury-lamp and electron-beam processes are not interchangeable versions of the same recipe.

EXAMPLE 1: PHOTOMER 4017 HDDA DOSAGE SCREENING IN A CLEAR UV WOOD VARNISH

Objective: Assess how replacing part of an oligomer with PHOTOMER 4017 HDDA affects application viscosity, film formation, hardness and adhesion.

Starting components:

PHOTOMER 4017 HDDA: approximately 20.00%, 30.00% and 40.00% in separate trials.

Compatible aliphatic urethane acrylate oligomer: approximately 75.00%, 65.00% and 55.00%, respectively.

Photoinitiator package matched to the selected UV source: approximately 4.00%, held constant after compatibility assessment.

Compatible leveling additive: approximately 0.50%.

Compatible defoamer: approximately 0.50%.

Wood species, moisture, sanding, sealer and applied film thickness: held constant.

Application approach:

Blend the urethane acrylate oligomer and PHOTOMER 4017 HDDA under controlled mixing and temperature conditions.
Incorporate the additives and photoinitiator package under lighting suitable for handling photosensitive mixtures.
Confirm uniform incorporation, then measure viscosity at a defined temperature and shear condition.
Apply equal-thickness films to consistently prepared wood panels, with additional reference panels where required by the test method.
Cure at the established exposure conditions and record substrate temperature.
After identical conditioning, compare tack, hardness, adhesion, gloss and resistance to intended service conditions.
Assess cure using a suitable analytical or validated performance method; surface dryness alone is insufficient.

This is an oligomer-for-HDDA substitution study, so changes reflect both components. Select PHOTOMER 4017 dosage by balancing application and cured-film properties. Lower viscosity does not automatically mean better adhesion, flexibility or cure. Reassess the curing window after selecting a composition.

EXAMPLE 2: PHOTOMER 4017 HDDA REACTIVE-DILUENT BALANCE IN A WHITE UV COATING

Objective: Examine the effect of replacing a monofunctional reactive diluent with PHOTOMER 4017 HDDA at constant oligomer and pigment loading.

Starting approach:

PHOTOMER 4017 HDDA: approximately 15.00%, 20.00% and 25.00% in separate trials.

Isobornyl acrylate (IBOA): approximately 18.00%, 13.00% and 8.00%, respectively.

Compatible epoxy acrylate oligomer: approximately 40.00%, held constant.

Titanium dioxide suitable for radiation-curable coatings: approximately 20.00%, held constant.

Photoinitiator package selected for the pigmented system and UV source: approximately 5.00%, held constant after assessment.

Compatible pigment dispersant: approximately 1.50%.

Compatible leveling additive: approximately 0.50%.

Application approach:

Prepare each pigment dispersion with the selected oligomer, reactive diluents and dispersant, using the same equipment and dispersion protocol.
Control processing temperature and check grind fineness before adding the remaining components.
Incorporate the photoinitiator package and leveling additive under controlled light conditions.
Measure viscosity, pigment dispersion quality and short-term physical stability.
Apply identical film thicknesses to the same prepared substrate and cure under documented exposure conditions.
Compare opacity, gloss, adhesion and cure at both the surface and the substrate interface.
Check resistance to relevant liquids and evaluate cracking or loss of flexibility after conditioning.

Keep pigment grade and surface treatment constant because they can affect dispersion and light penetration. A dry top surface does not prove through-cure. If curing is inadequate, optimize the photoinitiator, exposure or film thickness in a separate series and repeat the composition comparison. Do not assume that increasing PHOTOMER 4017 HDDA alone resolves optical limitations in a pigmented film.

EXAMPLE 3: PHOTOMER 4017 HDDA SCREENING IN A UV-CURABLE ACRYLATE ADHESIVE

Objective: Evaluate how PHOTOMER 4017 HDDA influences adhesive flow, bondline curing and mechanical performance when total oligomer content remains constant.

Starting approach:

Flexible urethane acrylate oligomer: approximately 70.00%, held constant.

PHOTOMER 4017 HDDA: approximately 10.00%, 15.00% and 20.00% in separate trials.

Isobornyl acrylate: approximately 17.00%, 12.00% and 7.00%, respectively.

Photoinitiator package compatible with the source and bondline: approximately 3.00%, held constant after assessment.

Substrate preparation, adhesive quantity, bondline thickness and assembly geometry: held constant.

At least one adherend must transmit the wavelengths required by the selected photoinitiator through to the bondline. Visual transparency alone does not establish this condition.

Application approach:

Blend the oligomer, PHOTOMER 4017 HDDA and isobornyl acrylate until uniform.
Incorporate the photoinitiator and check for undissolved material and entrained air.
Measure viscosity and assess controlled spreading or dispensing on representative substrates.
Prepare matched assemblies with a defined bondline thickness.
Cure through the selected transmitting adherend, accounting for its spectral transmission and recording the exposure conditions.
After consistent conditioning, compare bond strength using a method suited to the assembly and record adhesive, cohesive or substrate failure.
Evaluate thermal or moisture conditioning relevant to the intended service, and investigate shrinkage-related stress where observed.

These trials are not a pressure-sensitive adhesive design or a medical-device qualification. Select PHOTOMER 4017 dosage from bond performance and cure evidence rather than dispensing viscosity alone. An inaccessible or opaque bondline requires a different validated curing strategy.

For all three examples, avoid skin and eye contact with uncured acrylates and follow the current Safety Data Sheets for protective equipment, ventilation and storage. Protect photosensitive formulations from unintended exposure and monitor mixing temperature. Do not remove or alter the supplied inhibitor system without explicit supplier guidance. Requirements for oxygen during storage and atmosphere during curing must be assessed separately. Verify residual monomer, final performance, packaging compatibility and relevant end-use requirements before scale-up; these examples do not establish food-contact, cosmetic, dental or medical suitability.

QUALITY CONTROL, PRODUCT SPECIFICATIONS AND PURCHASING CRITERIA

A PHOTOMER 4017 purchase specification should begin with confirmation of HDDA identity, the correct trade grade and the chemical identifiers CAS 13048-33-4 and EC 235-921-9. The buyer should also obtain the technical sheet for the offered production period and the regional safety data sheet applicable to the delivered material.

Useful quality checks are viscosity at a stated temperature and method, appearance, color, acid value, moisture, inhibitor content, residual solvent and refractive index. The historical published limits of 5-10 mPa.s at 25 degrees Celsius, APHA color no more than 60, acid value no more than 0.2 mg KOH/g, moisture no more than 0.2%, inhibitor 100-500 ppm and residual solvent no more than 1000 ppm are specific to the cited product sheet. They should not automatically be converted into contractual terms without an agreed current specification.

The certificate of analysis is used to establish batch-related analytical values, typically against an agreed specification. A technical data sheet describes representative product properties and potential uses, while a safety data sheet addresses hazards, handling, emergency measures, exposure controls and transport; the three documents serve different purposes.

Buyers should verify the type of container and conditions for transport or warehouse storage. A historical product sheet lists 200 kg drums and 1000 kg intermediate bulk containers, but this does not prove present inventory, offered package sizes or delivery terms from Ataman Kimya. Before ordering, request details for the exact lot or offered grade if these are material to the intended use.

A supplier declaration that the base substance appears in a chemical inventory does not automatically confer approval for cosmetics, food contact, medical devices, electronic standards or other sensitive applications. The buyer is responsible for checking jurisdiction-specific obligations, intended exposures and downstream compliance requirements.

REGULATORY STATUS AND END-USE RESTRICTIONS

In the European Union, hexamethylene diacrylate (hexane-1,6-diol diacrylate) has the harmonized CLP index number 607-109-00-8. The harmonized categories include Skin Irrit. 2 (H315), Eye Irrit. 2 (H319) and Skin Sens. 1 (H317). The actual marketed formulation may also require other hazard statements where supported by supplier classification and regional requirements.

The chemical has an EC / EINECS number and appears in public chemical inventory records. Such registration or inventory listing is not equivalent to approval for unrestricted end uses. Buyers and manufacturers should evaluate REACH duties, occupational safety, waste controls and relevant finished-article rules as applicable.

A European Commission decision in 2016 did not identify HDDA as a substance of very high concern solely on the particular skin-sensitization rationale considered in that decision. This narrowly framed historical conclusion must not be interpreted as a general finding that HDDA is nonhazardous, non-sensitizing or permanently exempt from all future regulatory assessment.

Food-packaging inks and coatings, dental or medical applications, and coatings for articles with significant skin exposure require separate risk assessment and, where applicable, specific regulatory evaluation. No universal food-contact authorization, biocompatibility status, pharmaceutical quality or migration exemption is established by the name PHOTOMER 4017.

PHOTOMER 4017 (HDDA) is not identified as an E-numbered food additive, and E/INS classification is not a relevant designation for this industrial acrylate monomer. It should not be marketed as a cosmetic preservative or food ingredient on the strength of an ordinary HDDA chemical record.

FIRST AID

Inhalation:
If vapors, mist or aerosol from PHOTOMER 4017 are inhaled and symptoms occur, move the affected person to fresh air and keep them comfortable for breathing. Obtain medical assessment for persistent irritation, breathing difficulty or other significant symptoms; emergency medical help is required for severe breathing problems. Exposure to a low-vapor-pressure liquid is still possible where spraying, heated processing or splashing creates airborne droplets.

Skin Contact:
If PHOTOMER 4017 contacts skin, remove contaminated clothing and wash the affected skin thoroughly with water and soap. Seek medical advice for irritation or any allergic reaction, and avoid subsequent unprotected exposure because HDDA is a recognized skin sensitizer. Do not use organic solvents to clean the skin.

Eye Contact:
If PHOTOMER 4017 enters the eyes, immediately rinse cautiously with water for at least 15 minutes, holding eyelids open and removing contact lenses if they are present and easy to remove. Continue rinsing and obtain prompt medical evaluation, especially if pain, redness, visual changes or irritation persist. The neat monomer has an established eye-irritation classification.

Ingestion:
If PHOTOMER 4017 is swallowed, rinse the mouth if the person is conscious and able to do so and contact a poison center or physician promptly. Do not induce vomiting and do not give anything orally to an unconscious person. Treatment should follow professional medical advice and the current regional SDS.

Note to Physicians:
Tell the treating clinician that the exposure involves 1,6-hexanediol diacrylate, CAS 13048-33-4, a skin-sensitizing acrylate monomer, and provide the SDS for the actual PHOTOMER 4017 (HDDA) grade where available. Clinical management is based on observed symptoms, exposure route and severity; there is no universal home antidote or neutralization procedure recommended here.

HANDLING AND STORAGE

Handling:
Handle PHOTOMER 4017 as an industrial reactive acrylate monomer with the potential to irritate and sensitize skin. Prevent splashes and routine direct contact, use controlled transfer equipment, keep work surfaces clean and avoid unnecessary aerosol generation. Do not use contaminated equipment that can introduce incompatible reactive substances into storage containers.

Engineering Controls:
When processing HDDA, provide suitable local exhaust or other ventilation according to exposure assessment, especially for spraying, filling, maintenance and any operation creating mist. Equipment design should also manage accidental releases and prevent liquid accumulation on walking surfaces.

Eye and Face Protection:
Wear appropriate chemical splash goggles when handling PHOTOMER 4017, with additional face protection when splash risk warrants. Ordinary spectacles alone should not be presumed sufficient for industrial liquid transfer.

Skin and Hand Protection:
Use chemical-resistant gloves and protective clothing suitable for HDDA, choosing materials and breakthrough limitations from the current supplier SDS and glove-manufacturer guidance. Replace contaminated items promptly, wash exposed skin, and never treat sensitization risks as resolved by short exposure time alone.

Respiratory Protection:
For HDDA, use engineering controls as the primary method of controlling airborne mist or vapor. If assessment indicates a respirator is needed, the type and filter must be selected by a qualified professional according to the exposure, local regulations and current SDS; an unspecified mask is not a substitute for ventilation.

Storage:
Store PHOTOMER 4017 in properly identified, compatible, closed containers in a cool, dry, well-ventilated location protected from direct sunlight and heat. Follow the current handling guidance for PHOTOMER 4017 (HDDA) for inhibitor effectiveness, oxygen availability where relevant, container size and maximum permitted storage temperature. Never assume that refrigeration, total oxygen exclusion or heating improves stability without grade-specific instructions.

Low-Temperature Conditioning:
The published PHOTOMER 4017 sheet notes that cold or freezing conditions may cause crystallization or stratification. It recommends allowing PHOTOMER 4017 (HDDA) to return to room temperature and mixing well before use; avoid uncontrolled heating and confirm homogeneity and relevant QC properties before transferring material into a production formula.

Material Compatibility:
Keep HDDA separate from incompatible reagents and conditions that may trigger undesired polymerization, including unapproved initiators, contamination, high heat and intense light. Consult the current SDS for specific incompatibilities and use compatible seals, hoses and tank materials that have been evaluated for acrylate service.

Spill Procedures:
For a PHOTOMER 4017 spill, isolate the area, prevent contact and drain entry, and use suitable inert absorbent material where cleanup is safe and trained personnel are available. Avoid generating aerosols, collect contaminated material in compatible labeled containers and follow the current SDS and site spill plan. Large spills require appropriately equipped response personnel.

Environmental Precautions:
Do not discharge uncured HDDA to drains, soil or surface water. Even when a particular transport classification has not been confirmed, environmental release should be prevented and waste management should follow applicable chemical regulations.

Fire Response:
In a PHOTOMER 4017 fire, emergency responders should follow the site emergency plan and the current SDS for extinguishing agents and protective equipment. Heating can create hazardous decomposition products and may accelerate unwanted polymerization; fire personnel may need self-contained breathing apparatus and cooling of exposed containers. A flash point greater than 200 degrees Fahrenheit in a substance reference does not make the liquid safe to heat indiscriminately.

Waste Disposal:
Uncured PHOTOMER 4017, absorbed spills, contaminated tools and containers should be managed as chemical waste under applicable local rules. Curing a liquid is not a universal substitute for authorized waste treatment, and disposal status depends on composition, contaminants and local regulation.

SAFETY AND TRANSPORT INFORMATION

The harmonized EU substance classification for 1,6-hexanediol diacrylate includes H315 (Causes skin irritation), H319 (Causes serious eye irritation) and H317 (May cause an allergic skin reaction). The primary occupational control priority is therefore avoidance of skin and eye contact and control of aerosols and spills. A formulated mixture can carry additional hazards arising from pigments, initiators, solvents or other ingredients.

The current regional safety data sheet for PHOTOMER 4017 (HDDA) should be consulted for the exact signal word, pictograms, precautionary statements, ecological hazards and occupational controls. The presence of stabilizer and any additional ingredients can be relevant to product-specific classification; this profile does not substitute for that legal document.

Transport Classification: Not independently verified for the exact current PHOTOMER 4017 grade in the applicable transport mode. Some commercial HDDA substance listings identify UN 3082, ENVIRONMENTALLY HAZARDOUS SUBSTANCE, LIQUID, N.O.S., hazard class 9, packing group III; this must not be applied automatically to PHOTOMER 4017 without its current SDS and modal shipping evaluation. A UN number stated for another HDDA grade does not definitively classify every shipment of PHOTOMER 4017 (HDDA).

Environmental Hazard: Product-specific and jurisdiction-dependent classification should be established from the supplied SDS. Independently of formal transport criteria, release of uncured acrylate monomer to the environment should be avoided.

Flash and Thermal Hazards: A flash-point observation greater than approximately 93 degrees Celsius in a substance reference is not a complete fire-risk assessment. Heating, polymerization heat, open flames and contaminated mixtures create distinct hazards, while aerosolized material may behave differently from a quiescent liquid.

Occupational Monitoring: Where a facility needs measured exposure data, a validated sampling method specifically for 1,6-hexanediol diacrylate is documented by the United States occupational safety authority. An available sampling method is not itself an occupational exposure limit and does not replace a site-specific hygiene program.

Health Risk Beyond Acute Irritation: Acrylate sensitization may lead to allergic contact reactions after subsequent exposure. Employees who develop persistent rashes, dermatitis or suspected sensitization should be evaluated by occupational health professionals and should not continue unprotected handling.

FREQUENTLY ASKED QUESTIONS ABOUT PHOTOMER 4017 (HDDA)

What is PHOTOMER 4017 (HDDA)?
PHOTOMER 4017 (HDDA) is a commercial 1,6-hexanediol diacrylate reactive diluent used mainly in UV- and electron-beam-curable formulations.

What does HDDA stand for?
HDDA stands for 1,6-hexanediol diacrylate, also called hexamethylene diacrylate.

Is PHOTOMER 4017 a different chemical from 1,6-hexanediol diacrylate?
No. PHOTOMER 4017 is a commercial grade of the HDDA substance; grade-level stabilizers and quality specifications may differ.

What is the CAS number of PHOTOMER 4017?
The HDDA substance has CAS number 13048-33-4.

What is the EC / EINECS number of PHOTOMER 4017 (HDDA)?
The EC / EINECS number of PHOTOMER 4017 (HDDA) is 235-921-9.

What is the molecular formula of HDDA?
The molecular formula is C12H18O4.

What is the molecular weight of 1,6-hexanediol diacrylate?
The molecular weight is approximately 226.27 g/mol.

What type of monomer is PHOTOMER 4017?
PHOTOMER 4017 (HDDA) is a difunctional aliphatic acrylate ester monomer.

How many reactive acrylate groups does HDDA have?
Each HDDA molecule contains two polymerizable acrylate groups.

What does difunctional mean in this context?
It means the molecule offers two reactive acrylate double bonds that can participate in polymer-network formation.

Is HDDA the same as 1,6-hexanediol?
No. 1,6-Hexanediol is the unesterified diol, whereas HDDA is its diacrylate ester with different reactivity and hazards.

Is HDDA the same as ethoxylated hexanediol diacrylate?
No. Ethoxylated variants contain additional oxyethylene units and have different chemical identities and properties.

What is PHOTOMER 4017 primarily used for?
The principal function of PHOTOMER 4017 (HDDA) is to lower viscosity and contribute curable acrylate functionality in radiation-curable coatings, inks and adhesives.

Is PHOTOMER 4017 a conventional evaporating solvent?
No. PHOTOMER 4017 (HDDA) is a reactive diluent designed to be incorporated into the polymer network during curing.

Is PHOTOMER 4017 a photoinitiator?
No. HDDA is a monomer; a UV system generally needs a suitable initiating chemistry to create radicals.

Can PHOTOMER 4017 be cured using UV radiation?
Yes, when incorporated into a compatible formulation with an appropriate photoinitiator and adequate radiation exposure.

Can PHOTOMER 4017 be used in electron-beam curing?
Yes. The supplier describes the grade for EB-curable systems, subject to process and formulation validation.

Can PHOTOMER 4017 (HDDA) be cured with UV-LED equipment?
Potentially, but the photoinitiator absorption, LED spectrum, pigment loading and cure depth must be matched and tested.

What is the viscosity of PHOTOMER 4017?
A published 2016 product sheet reports 5-10 mPa.s at 25 degrees Celsius by Brookfield ISO 2555; the product website lists a typical value of 8 mPa.s at 25 degrees Celsius.

Is the listed viscosity kinematic or dynamic?
It is dynamic viscosity, expressed in mPa.s, equivalent numerically to centipoise.

What is the density of PHOTOMER 4017?
The published grade data show 1.010-1.030 g/cm3 at 25 degrees Celsius.

What is the refractive index of PHOTOMER 4017 (HDDA)?
A published technical sheet states 1.4530-1.4570 at 25 degrees Celsius.

What is the typical appearance of PHOTOMER 4017?
PHOTOMER 4017 (HDDA) is described in published product data as a clean, clear liquid.

What is the APHA color limit in the historical product sheet?
The published limit is APHA color no greater than 60; the offered batch should be evaluated against its current specification.

What acid value is reported for the grade?
The cited product sheet lists an acid value of no more than 0.2 mg KOH/g.

What moisture limit is published for PHOTOMER 4017?
The 2016 technical sheet reports moisture no more than 0.2% by a Karl Fischer method.

Does PHOTOMER 4017 (HDDA) contain a polymerization inhibitor?
The published PHOTOMER 4017 (HDDA) data sheet states inhibitor content of 100-500 ppm, but inhibitor identity and present grade limits should be verified.

Why is an inhibitor included?
It helps limit unintended polymerization during transport and storage; inhibitor control is a safety and product-quality consideration.

Can the inhibitor be removed before use?
It should not be removed without an engineered procedure supported by the supplier and a documented safety assessment.

What solvent residue limit is reported?
A published grade sheet specifies no more than 1000 ppm solvent by GC analysis.

What is the melting point of PHOTOMER 4017?
A single reliably established commercial-grade value was not confirmed; the PHOTOMER 4017 (HDDA) sheet notes possible crystallization under cold conditions.

Why are HDDA boiling-point values inconsistent across references?
Different sources may use different conditions or methods, and the published PHOTOMER 4017 sheet does not establish a definitive atmospheric-pressure specification.

Is HDDA soluble in water?
It has limited water solubility; a substance reference reports less than 0.1 mg/mL at approximately 18 degrees Celsius.

Is PHOTOMER 4017 a surfactant?
No. The main function of PHOTOMER 4017 (HDDA) is polymerizable reactive dilution, not surfactant action.

Why is HDDA effective at reducing viscosity?
Its relatively small molecules can blend with compatible viscous acrylate oligomers and lower the overall flow resistance of the uncured formulation.

Does lower viscosity automatically improve every coating?
No. It can also affect wetting, sagging, coating weight, pigment response and final network properties.

Which oligomers are highlighted as compatible in supplier literature?
The published sheet highlights solvency with high-viscosity urethane and epoxy oligomer systems.

Can PHOTOMER 4017 be used in wood coatings?
Yes. Wood finishes are explicitly listed, subject to substrate and formulation testing.

Can PHOTOMER 4017 be used in paper and board coatings?
Yes. Paper and board coatings are identified applications for UV- and EB-curable systems.

Can HDDA be used in pigmented printing inks?
Yes. It is described for pigmented coatings and graphic arts, but cure penetration and pigment effects need testing.

Can PHOTOMER 4017 (HDDA) be used in inkjet inks?
The supplier lists inkjet as an application area; printhead, viscosity, purity, particle and cure compatibility require separate qualification.

Can PHOTOMER 4017 be used on plastics?
PHOTOMER 4017 (HDDA) may be assessed in plastic-coating formulas, but substrate swelling, surface preparation, adhesion and flexibility must be validated.

Is PHOTOMER 4017 relevant to metal coatings?
Yes. Metal coatings are listed by the supplier, although metal-specific adhesion and corrosion protection are properties of the complete system.

Can HDDA be used in coatings for glass?
The published sheet mentions glass among potential substrates after adequate testing; adequate adhesion and stress management are essential.

Can PHOTOMER 4017 be used in adhesives?
Yes. The published product documentation identifies acrylate-based UV-curable adhesives as an area for evaluation.

Can HDDA be used in photoresists or solder masks?
The supplier indicates these may offer opportunities after adequate testing rather than a universal electronics qualification.

Can PHOTOMER 4017 be used in 3D printing?
HDDA chemistry can be relevant to photopolymer formulations, but suitability of this specific grade for a particular printing process must be established.

Does HDDA increase hardness?
Its difunctionality can increase network connectivity in suitable systems, but cured-film hardness is not guaranteed by HDDA alone.

Does HDDA always make a film more brittle?
No. Brittleness depends on crosslink density and the full formulation, though excessive network stiffness can reduce flexibility.

Does PHOTOMER 4017 eliminate cure shrinkage?
No. The published sheet describes moderate shrinkage, not zero shrinkage; stress and dimensional change require testing.

What causes oxygen inhibition in UV acrylate curing?
Oxygen can react with growing radicals, slowing surface polymerization and sometimes leaving tack.

Can HDDA cure without a photoinitiator under UV light?
A standard UV acrylate system usually relies on an appropriate photoinitiating mechanism; do not assume neat HDDA will reliably cure under an arbitrary lamp.

Does EB curing always require a photoinitiator?
No. Electron-beam energy can directly initiate curing, although processing requirements remain formulation-specific.

Why is substrate testing necessary?
Surface chemistry, contamination, porosity and movement can determine whether a coating or adhesive adheres successfully.

Does the name PHOTOMER 4017 specify a recommended loading percentage?
No. The reviewed supplier documentation does not establish a universal formulation percentage.

Does the trade grade guarantee fast line speeds?
No. Curing speed depends on irradiation, initiator selection, oxygen, pigments, thickness and the other resin ingredients.

What must be checked for food-packaging coatings or inks?
Regulatory suitability, cured-film migration, extractables, residual monomer and the actual exposure scenario must be evaluated; the base grade name does not establish clearance.

Is PHOTOMER 4017 approved for medical devices?
No universal medical-device authorization or biocompatibility finding is established by the referenced general product information.

What are the key harmonized EU hazard statements for HDDA?
H315 for skin irritation, H319 for serious eye irritation and H317 for skin sensitization.

Can HDDA cause allergic skin reactions?
Yes. It has a harmonized skin-sensitization classification and contact prevention is important.

Should workers wear gloves while handling PHOTOMER 4017?
Yes. Chemical-resistant gloves selected for the actual exposure and verified against the current SDS and glove compatibility information are appropriate.

What should be done after skin contact?
Remove contaminated clothing, wash affected skin with soap and water, and seek medical advice if irritation or allergy develops.

What should be done after eye contact?
Immediately rinse with water for at least 15 minutes, remove contact lenses if easy, continue rinsing and seek prompt medical evaluation.

What should be done after swallowing HDDA?
Rinse the mouth if appropriate, seek urgent poison-center or medical advice, and do not induce vomiting.

How should PHOTOMER 4017 be stored?
Keep PHOTOMER 4017 (HDDA) in compatible closed containers in a cool, dry, ventilated place away from sunlight and heat, following the current supplier instructions.

How long is PHOTOMER 4017 stable in storage?
The published 2016 sheet states at least 12 months under its recommended conditions; current shelf life must be confirmed for the delivered grade.

What if PHOTOMER 4017 crystallizes in cold weather?
The published sheet advises returning PHOTOMER 4017 (HDDA) to room temperature and mixing, subject to safe handling and confirmation of uniformity.

Does PHOTOMER 4017 have a fixed UN number?
An exact current product-specific assignment was not independently verified; other HDDA listings mention UN 3082, but shipping classification must follow the actual SDS and transport rules.

Is PHOTOMER 4017 flammable?
A substance reference reports a flash point greater than 200 degrees Fahrenheit, but actual fire management depends on the current SDS, temperature, mist formation and other ingredients.

What is the difference between TDS, SDS and COA?
The TDS describes technical properties and uses, the SDS covers hazards and safe handling, and the COA documents batch-associated quality results.

Can one HDDA brand replace another without reformulation?
Not necessarily. Check inhibitor chemistry, viscosity, acidity, color, residual impurities, curing response and relevant performance specifications.

Can PHOTOMER 4017 be used as a finished coating by itself?
PHOTOMER 4017 (HDDA) is marketed as a reactive ingredient; complete coating performance and safe curing require a designed and validated formulation.

Does PHOTOMER 4017 have an E number or INS number?
No. PHOTOMER 4017 (HDDA) is not presented as an E/INS food additive and such a designation is not applicable.

How can a purchaser request PHOTOMER 4017 from Ataman Kimya?
Provide the intended application, curing method, target viscosity, required quantity and destination, then request the offered grade specifications, current availability, packaging and quotation.

TECHNICAL SUMMARY

PHOTOMER 4017 (HDDA) is a clear, low-viscosity, difunctional acrylate reactive diluent based on 1,6-hexanediol diacrylate, CAS 13048-33-4 and EC 235-921-9. It is used mainly in energy-curable coatings, inks and adhesives to improve the processability of resin blends while contributing two acrylic double bonds to free-radical curing and network formation.

A published PHOTOMER 4017 data sheet reports 5-10 mPa.s dynamic viscosity at 25 degrees Celsius, density values of 1.010-1.030 g/cm3 at 25 degrees Celsius, APHA color no more than 60, acid value no more than 0.2 mg KOH/g, moisture no more than 0.2%, inhibitor content 100-500 ppm and residual solvent no more than 1000 ppm. These are historically published representative product specifications, not a verified current batch certificate.

The primary commercial advantages of PHOTOMER 4017 (HDDA) include low uncured viscosity, suitability for UV and EB acrylate systems and documented solvency for many viscous acrylate oligomers. Material selection still requires evaluation of crosslinking, shrinkage, flexibility, adhesion, surface cure, substrate compatibility and residual monomer, along with protection against eye and skin irritation and skin sensitization.

The buyer should request the current TDS, regional SDS and, where available, a batch-specific COA before adopting PHOTOMER 4017 (HDDA) for an application. Any claim of specific regulatory approval, controlled migration, present inventory, exact transport classification or current packaging availability must be verified for the actual offered grade and destination.

CONTACT ATAMAN KIMYA

Customers evaluating PHOTOMER 4017 (HDDA) may contact Ataman Kimya to discuss their intended UV- or EB-curable coating, ink or adhesive process and to determine which technical documents and quality requirements are relevant. Ataman Kimya can be asked about a suitable offered grade, available documentation, packaging options, current availability and a quotation; these details are subject to confirmation and should not be taken as promises of stock or certification.

For a technically useful inquiry, describe the substrate, application method, target viscosity, curing technology and important performance requirements. Where appropriate, request a current SDS, TDS and batch-related COA, as well as clarification of inhibitor level, shipping classification and suitable storage provisions for the offered material.

Ataman Chemicals
Phone: +90 216 577 10 10
Email: info@atamankimya.com