BYK P 105

PRODUCT IDENTITY

Product designation: BYK P 105
Documented trade designation: BYK-P 105
Product category: Commercial wetting and dispersing additive with a controlled-flocculating function
Chemical description: Lower-molecular-weight unsaturated polycarboxylic acid polymer
Delivery form: Viscous liquid
CAS Number: No single CAS Number is assigned here to the complete commercial grade
EC Number: No single EC Number is assigned here to the complete commercial grade
Molecular Formula: Not applicable as one fixed formula for the commercial formulation
Molecular Weight: Not one fixed value; the commercial material contains a distribution of chemical species
Principal functional characteristic: Acid-functional material that promotes controlled particle interactions
The reviewed EU safety documentation treats BYK P 105 as a mixture. It identifies maleated C14-18 and C16-18-unsaturated fatty acids, CAS Number 85711-46-2, as a principal component and discloses residual maleic anhydride, CAS Number 108-31-6. These component identities should not be converted into one supposedly exact molecular identity for the finished commercial grade.
The technical polymer description and the safety-document composition disclosure serve different purposes. The former summarizes functional chemical nature, while the latter identifies reportable constituents for hazard communication. Neither establishes a fully disclosed synthesis recipe, precise molecular architecture or single molecular weight.

SYNONYMS

BYK P 105, BYK-P 105, BYK P105, BYK-P105, BYKP105, BYK P 105 Wetting Additive, BYK P 105 Dispersing Additive, BYK-P 105 Wetting and Dispersing Additive, BYK P 105 Wetting and Dispersing Agent, BYK P 105 Controlled Flocculating Additive, BYK P 105 Controlled-flocculation Agent, BYK P 105 Filler Stabilizer, BYK P 105 Filler Stabiliser, BYK P 105 Filler Wetting Agent

CHEMICAL NATURE AND ACID FUNCTIONALITY

BYK P 105 contains carboxylic-acid functionality in an organic material with unsaturated, fatty-acid-related chemistry. The acid groups can interact with suitable solid surfaces, while the organic portions contribute compatibility with the surrounding liquid phase. Actual adsorption and network formation depend on the specific filler and resin environment.
The term lower molecular weight is relative to larger polymeric dispersants. It does not provide a numerical molecular-weight specification and should not be used to invent a molar mass. Acid value, viscosity, non-volatile matter and application performance are more directly useful commercial descriptors.
Acid functionality can influence compatibility with basic fillers, amines, metal-containing ingredients and reactive resin components. A favorable initial wetting result does not prove that the same composition will remain stable after storage or cure. These interactions should be checked where they matter to the formulation.
BYK P 105 should not be described as a neutralized polycarboxylate salt unless the actual preparation has been neutralized. Its behavior can change with neutralization state. Adding a base is a chemical formulation change that can affect heat generation, compatibility and the particle network.
The unsaturated chemical description does not establish a reactive equivalent weight for the commercial grade. BYK P 105 is not presented as a curing agent, photoinitiator or universal reactive diluent. Any effect on a particular cure mechanism must be determined in that resin system.

PHYSICAL PROPERTIES

Typical technical data for BYK P 105 describe the commercial grade and should be kept separate from contractual acceptance limits. The current technical sheet and the reviewed safety documentation provide the following useful information.
Physical state: Liquid.
Appearance: The reviewed EU safety document describes a brown liquid with a slight odor.
Density: Approximately 1.045 g/cm3 at 20 °C.
Non-volatile matter: Approximately 98.5% after 10 minutes at 150 °C.
Acid value: Approximately 365 mg KOH/g.
Flash point: Above 110 °C.
Viscosity: High; no universal numerical release value is assigned in this profile.
Water behavior: Immiscible in the reviewed safety documentation.
Vapor pressure: Indicative derived value below 1 hPa at 20 °C in the reviewed safety documentation.
Boiling behavior: The reviewed safety document gives an indicative value above 200 °C; this is not a sharply defined boiling point for one pure molecule.
Storage and transport temperature: Below 50 °C under the current technical instructions.
Shelf life: 60 months in unopened original packaging under the specified conditions.
Density and metering
At the typical density, one liter of BYK P 105 corresponds to approximately 1.045 kg at 20 °C. This conversion is useful for preliminary dosing calculations, but accurate production metering should use the applicable batch and temperature basis. A mass percentage must not be treated as a volume percentage.
High viscosity can affect pump delivery and the accuracy of small additions. Verify that the dosing system delivers the intended mass after changes in temperature or container fill level. Material remaining in a transfer line can be significant when the target amount is small.
Non-volatile matter
The 98.5% result is a method-defined oven residue. It supports description of a highly concentrated, solvent-free delivery form, but it is not a complete impurity analysis or a proof that every remaining component is the desired functional polymer. Exact active-content terminology should follow the agreed specification.
The approximately 1.5% oven mass loss should not automatically be called an added solvent fraction. Water, residual low-molecular-weight material and method effects can contribute. VOC calculations use their own definitions and do not necessarily equal loss under an oven-residue method.
Viscosity and warming
The technical instructions recognize that BYK P 105 is highly viscous and may need warming to flow more readily before processing. Use controlled equipment and an approved handling procedure. The instructions to store and transport below 50 °C remain applicable and must not be replaced by a temperature inferred from the flash point.
No universal warming temperature is invented here. The required condition depends on the equipment, residence time and actual product guidance. Avoid localized overheating and verify the material temperature rather than relying only on the heater setting.
Water, pH and solvent compatibility
A pH measured in a diluted preparation is not interchangeable with the acid value of the neat additive. The product's immiscibility with water also means that an apparent aqueous pH needs a defined preparation method. Use acid value to describe the documented titratable acidity.
White-spirit-based systems and formulations diluted with white spirit have documented compatibility limitations. Do not assume that a solvent-free additive is equally compatible with every organic carrier. Test the final solvent blend, resin concentration and storage temperature.

ACID VALUE AND FORMULATION SIGNIFICANCE

The typical acid value of 365 mg KOH/g expresses the amount of potassium hydroxide equivalent needed to neutralize the titratable acidity in one gram of material under the specified analytical method. It is not the percentage of free maleic anhydride and does not mean that the product contains 36.5% potassium hydroxide.
Using 56.1 g/mol for potassium hydroxide, the value corresponds to approximately 6.5 milliequivalents of titratable acidity per gram. The associated acid-equivalent mass is approximately 154 g per equivalent. These are analytical conversions from a typical acid value, not molecular weights or a cure stoichiometry for BYK P 105.
Acid capacity matters when the formulation includes basic surfaces or amine-containing components. Interactions may influence viscosity, dispersion structure or cure behavior. The magnitude and direction of the effect depend on the complete formulation, so acid value is a screening input rather than a prediction of every reaction.
Do not neutralize BYK P 105 simply to reproduce a desired pH reading without development work. Neutralization changes the chemical environment and can release heat. A neutralized preparation requires its own compatibility, stability and performance assessment.
Incoming acid-value consistency can help detect changes in material or method. A result outside the agreed range should be investigated rather than corrected by adding acid or base to the commercial grade. Use the actual specification and certificate instead of treating the typical value as a fixed release target.

CONTROLLED FLOCCULATION MECHANISM

BYK P 105 is selected to create controlled associations between solid particles. Additive-mediated interactions can connect particles into a three-dimensional structure while maintaining a different contact environment from a compact, uncontrolled agglomerate. The resulting organization can contribute to suspension stability and resistance to movement under gravity.
This function differs from complete deflocculation. A deflocculating dispersant is typically selected to maintain a highly separated particle population, often supporting lower viscosity or optimum optical development. A controlled-flocculating additive deliberately uses some particle association to obtain a useful formulation response.
Controlled flocculation should also be distinguished from poor dispersion. Persistent coarse agglomerates, irregular viscosity growth and unacceptable color change are not automatically evidence of the intended network. The finished system must demonstrate repeatable handling, storage and application behavior.
The network can change under shear. In a suitable system, particle associations can weaken during mixing or application and rebuild afterward. The actual degree of shear thinning and structural recovery must be measured; the commercial product name alone does not establish a numerical yield stress or recovery time.
Settling and sagging are related through low-shear behavior but are different tests. Settling describes movement of solids relative to the liquid during storage or standing. Sagging describes unwanted movement of an applied or placed material under gravity. A formulation can pass one assessment and fail the other.
The filler determines how much surface is available for interaction. Particle size, shape, treatment and surface chemistry can change the response even when total filler mass is unchanged. This is why a mass-based starting dose still needs optimization for the exact filler package.

APPLICATIONS

Acrylate adhesives
BYK P 105 is particularly recommended for acrylate adhesive formulations requiring filler stabilization. Controlled particle association can help keep the filler distribution more consistent during standing and can contribute to resistance to sagging after application. The resin and filler combination determines the useful balance.
Qualification should include storage homogeneity, mixing, dispensing and bond performance. An adhesive that remains well suspended can still be too stiff to wet the substrate or too slow to spread. Test the actual joint geometry and cure conditions rather than accepting a viscosity change as the only endpoint.

Filled acrylic adhesive components
BYK P 105 can be evaluated in the filled component of a suitable acrylic adhesive system. Its role is to improve particle handling and stability in that component, not to provide cure initiation. The concentration in a stored component can differ from the concentration in the final mixed adhesive.
Check both component storage and final cure. Acid-functional additives may interact with other formulation ingredients, so a stable freshly prepared component does not prove acceptable long-term behavior. Preserve the dose basis and mixing ratio when comparing trials.

Polyurethane adhesives
Polyurethane adhesives are a documented application for BYK P 105. The additive can help stabilize fillers when the selected resin phase provides suitable compatibility. The intended benefit is particle management and related application behavior, rather than an assumed contribution to isocyanate or hydroxyl stoichiometry.
Screen moisture sensitivity, acid interactions and cure response in the actual formulation. The presence of a useful wetting additive does not remove the need for water control or correct component balance. Pot life, foaming, bond strength and stored-component viscosity may all be relevant.

Solvent-free adhesive formulations
The concentrated delivery form makes BYK P 105 useful for suitable solvent-free adhesives where a diluted dispersant would introduce an unwanted carrier. Its high viscosity still requires attention during metering and incorporation. Solvent-free describes the supply approach, not a guarantee of zero low-molecular-weight material or zero emissions in every test.
Compatibility and application properties remain essential. Adding more of a concentrated additive is not automatically equivalent to adding more binder. Establish the effective level from filler mass and confirm that storage stability does not come at the expense of spreading or bond formation.

Solventborne adhesives
BYK P 105 can be used in suitable solventborne adhesives when the solvent blend supports compatibility. The acid-functional material must remain effectively distributed through manufacture, storage and solvent evaporation. A clear premix is a useful check but does not establish the state of the filled adhesive.
White-spirit-rich formulations require particular caution because compatibility is documented as limited. Test realistic dilution and solvent-loss conditions. Do not correct haze or separation by introducing an arbitrary solvent without reviewing the whole formulation and its handling requirements.

Filled sealant formulations
Within compatible adhesive and sealant systems, BYK P 105 can help stabilize fillers and support bead retention. This is useful when a formulation must remain homogeneous in the package and resist movement after placement. The actual sealant chemistry governs whether the additive is appropriate.
Evaluate extrusion force, tooling, slump and cured adhesion together. A strong particle network may improve sag resistance while making dispensing difficult. The desired result is a practical balance, and a separate rheology additive may still be required.

Ambient-curing acrylate resin systems
BYK P 105 is particularly recommended for acrylate thermoset systems that contain fillers. It can support more consistent particle distribution and reduce unwanted movement before cure. The benefit must be evaluated during the actual working time, not only in the uncured storage resin.
The additive is not a cure accelerator or photoinitiator. Check gel behavior, exotherm, cure development and finished properties as appropriate to the resin. A short liquid-state test does not establish that the particle network remains beneficial through cure.

Filled thermoset pastes and compounds
BYK P 105 can be screened in compatible ambient-curing filled resin pastes where settling or sagging is a limiting issue. This is a formulation-development extension of its documented filler-stabilizing function. Filler loading and surface treatment can make the response quite different from that of a less-filled adhesive.
The network must survive the relevant storage history without making mixing or placement impractical. Compare uniformity, redispersibility, application behavior and cured sections. Air retained by a structured paste requires separate attention because filler stabilization is not the same as deaeration.

Pre-dispersed filler preparations
A compatible filler preparation can provide a controlled stage for introducing BYK P 105 before the solids. This can improve contact between additive and filler during incorporation. The concentrate should reproduce the intended resin environment closely enough to remain representative after let-down.
Check whether dilution changes the network or promotes separation. A stable concentrate may behave differently after more binder, solvent or another component is added. Assess both the concentrate and the finished formulation rather than qualifying only the intermediate.

Pigmented industrial coating development
Product-family guidance also identifies coating uses for BYK P 105. In appropriate pigmented coatings, controlled particle interactions can be relevant to settling and color uniformity. The current grade-specific technical sheet emphasizes filler stabilization in adhesives and thermosets, so coating work should be qualified for the particular resin and pigment combination.
Do not copy the filler dosage automatically into a pigment-dispersion specification. Pigment surface area and optical requirements can differ greatly from those of a mineral filler. Color development, rub-out behavior, gloss and storage stability should be assessed together.

Primers, intermediate layers and filled coatings
Controlled-flocculating technology can be useful when suspension stability and application structure are more important than maximum gloss. BYK P 105 may be evaluated in compatible filled coating systems on that basis. It should not be described as independently providing corrosion inhibition or substrate adhesion.
For a protective coating, demonstrate the complete system's film formation, adhesion and exposure performance. A useful rheological change does not prove a better barrier. The resin, pigment package and surface preparation remain central to protective performance.

Specialist filler-stabilization trials
BYK P 105 can be considered when a new organic resin formulation shows a reproducible filler-settling problem and its chemical compatibility is plausible. Such screening should remain within the documented technical role. A generic filler-stabilizer description does not establish suitability for food, cosmetics, medicines or every waterborne system.
Start with a representative small formulation and compare it with a control. Assess whether the additive produces the desired storage and application balance without creating new instability. Use the results to define the approved scope rather than expanding application claims from a single successful observation.

DOSAGE AND MASS BALANCE

The current starting recommendation is 0.5-1.5% supplied BYK P 105 based on filler mass. The relationship is: additive mass equals filler mass multiplied by the selected percentage divided by 100. This differs fundamentally from an addition percentage based on total wet formulation or binder solids.
For a 100 kg final formulation containing 40 kg filler, the documented starting range corresponds to 0.20-0.60 kg of BYK P 105. Expressed on the final formulation, that is 0.20-0.60%, not 0.5-1.5%. The filler loading must therefore be known before the starting amount can be calculated.
For a 100 kg formulation containing 20 kg filler, the same filler-based range gives 0.10-0.30 kg additive. These examples illustrate the calculation basis, not a guaranteed optimum for either formulation. Different filler surfaces can require different levels even at the same total loading.
Define which solids are counted in the filler basis. A formulation may contain several fillers and pigments with very different surfaces, so the dosing rule should be recorded explicitly. Seek grade-specific guidance where the intended solids package falls outside the current application description.
Use the supplied-material basis unless the specification expressly requires another basis. The typical 98.5% non-volatile value should not be used to silently convert the published recommendation into a different active-content scale. If a diluted preparation is used, account for its actual concentration and carrier separately.
After a post-production adjustment, recalculate the cumulative amount. Repeated small corrections can exceed the tested range while each individual addition appears modest. Keep the solids loading and final batch mass consistent when comparing trial records.

INCORPORATION AND PROCESSING

For optimum performance, incorporate BYK P 105 into the liquid mill base before adding the pigments or fillers. In thermoset processing, the current instruction is to add it before the solids. This gives the additive an opportunity to contact particle surfaces during incorporation rather than attempting to reorganize an established dispersion afterward.
Warm the material only as needed under an approved procedure to improve flow. High viscosity can make an apparently small addition difficult to distribute. Account for material retained on tools or inside transfer lines, and verify that the intended amount reaches the batch.
Prepare a homogeneous liquid phase before charging solids. Local pockets of concentrated additive can produce a response different from that of an evenly distributed dose. The mixing requirement depends on viscosity, vessel geometry and the scale of the batch.
Add solids at a rate that allows proper wetting and avoids excessive dry agglomeration. A wetting additive does not replace the mechanical energy needed to incorporate particles. Use equipment and dust controls appropriate to the actual filler and process.
Monitor temperature during dispersion. Filler incorporation and high-shear mixing can heat the formulation, while warming the additive changes its viscosity and metering. Keep the process within the resin's validated operating conditions and the product's applicable handling instructions.
Late addition may give a different result from addition before solids. Do not assume that a post-addition correction will reproduce the same adsorption and network state. If correction is necessary, qualify it separately and record the resulting process change.
For a two-component system, decide where the additive will be stored and evaluate that component's stability. The final mixed adhesive or resin must also be assessed. A good response immediately after mixing does not establish suitability over the stored component's intended shelf life.

COMPATIBILITY AND REACTIVE-SYSTEM CONSIDERATIONS

BYK P 105 must remain compatible with the liquid phase while interacting usefully with the solids. The best response is not necessarily the clearest neat-resin blend or the largest viscosity increase. Examine the filled formulation throughout mixing, storage, application and cure.
Acid groups can interact with basic fillers and amines. Such interactions can affect surface adsorption and rheology, and in reactive systems they can influence the surrounding chemical environment. The effect should be measured rather than assumed to be beneficial or harmful in every case.
For polyurethane adhesives, include water control and cure behavior in the qualification. BYK P 105 is not assigned a verified hydroxyl or isocyanate equivalent weight in this profile. Do not alter component stoichiometry using acid-equivalent calculations as if they described a conventional polyurethane raw material.
For acrylate systems, examine the entire initiator and accelerator package where applicable. The unsaturated description does not establish that the additive will react into every network or remain chemically inert under every cure condition. Check the finished material for the properties that matter to service.
Test white-spirit compatibility explicitly if the formulation contains that solvent family. Dilution can change the balance enough to reveal haze or phase separation that was absent in the concentrated resin. A solvent substitution should be evaluated after realistic storage and application.
Do not assume that neutralization converts BYK P 105 into a broadly suitable waterborne dispersant. Neutralization state, aqueous compatibility and particle interactions require separate development. The neat grade's immiscibility with water remains relevant to direct incorporation.
Other dispersants and rheology additives can compete or cooperate with BYK P 105. A strongly deflocculating additive may weaken the intended network, while another structuring component may increase it. Evaluate combinations through a planned study rather than stacking several additives in response to one symptom.

PERFORMANCE TESTING

Establish a repeatable control formulation before assessing BYK P 105. Use the actual filler grade, surface treatment, resin and mixing sequence. Differences in those variables can be larger than the effect of a small dose change.
Compare several levels within the documented starting range and preserve the filler-based calculation. Record addition order and temperature as well as the final amount. A trial is difficult to interpret if the additive dose and dispersion method change together.
Measure low-shear and application-shear behavior where practical. A single viscosity value can miss differences in structural breakdown and recovery. The relevant response may be resistance to settling at rest combined with acceptable pumping, spreading or extrusion under shear.
Assess sedimentation by both separation and redispersibility. Record the amount of clear liquid, the condition of the settled phase and the effort needed to restore homogeneity. No visible settling after a short observation period is insufficient to establish long-term storage stability.
Test sag or slump in a geometry that represents the intended use. Film thickness, bead size, orientation and the delay before cure can change the result. A horizontal panel cannot demonstrate resistance to vertical sagging.
For pigmented systems, include color and rub-out observations. For adhesives, include substrate wetting and bond properties. For thermosets, inspect cured sections and the appropriate mechanical or dimensional behavior. The network should support the final application rather than merely improve a storage photograph.
Include accelerated storage only when its relation to practical aging is understood. Heat can alter resin viscosity, adsorption and chemical interactions, so an accelerated result may not predict every ambient-storage outcome. Confirm important conclusions with suitable real-time data.

QUALITY CONTROL

Exact grade identification
Confirm the product designation, delivery form and batch number. A solvent-containing preparation or similarly named grade is not automatically equivalent. The incoming documentation should match the material actually used in the approved formulation.

Appearance
Check color, uniformity and the absence of unexpected separation or foreign matter. The documented brown appearance should be considered when selecting a visual reference. Appearance is a useful screen but cannot prove correct acidity or functional performance.

Acid value
Measure acid value using the agreed titration method and basis. Method details, sample dissolution and endpoint selection can affect the result. The typical 365 mg KOH/g value is informative, while the actual specification controls acceptance.

Density
Measure density at the specified temperature and avoid entrained air. The typical 1.045 g/cm3 at 20 °C supports identity and dosing checks. Density alone cannot distinguish all composition changes or establish equivalent particle-stabilizing behavior.

Non-volatile matter
Use the stated 10-minute, 150 °C condition when comparing with the typical 98.5% value, unless the agreed release method specifies otherwise. Different drying times or sample geometries can alter mass loss. Do not reinterpret this measurement as a complete chemical assay.

Viscosity and handling
Define temperature, instrument and shear conditions for any viscosity acceptance test. High-viscosity materials can appear inconsistent if conditioning is not controlled. A plant pump setting is not a substitute for a reproducible laboratory measurement.

Water and residual components
Use application-relevant limits and suitable methods where water or residual substances affect performance or compliance. The safety disclosure of residual maleic anhydride is not a complete certificate of analysis. It also does not establish a universal analytical release limit for every batch parameter.

Functional reference testing
A controlled filler-stability test can supplement physical analysis. Use a qualified filler and resin, a fixed addition sequence and a defined storage and rheology assessment. Otherwise, variation in the reference formulation can be mistaken for variation in BYK P 105.

Traceability and release
Retain the certificate, specification version and batch history. If an internal transfer or blend changes the material's identity, preserve the relationship between lots. Numerical release limits should be agreed explicitly rather than inferred from a public typical-property table.

COMMERCIAL PRODUCTION AND MATERIAL CHARACTERIZATION

The exact production recipe and complete molecular distribution of BYK P 105 are not publicly disclosed. The available description supports acid-functional, unsaturated, fatty-acid-related material designed for controlled particle interactions. It does not justify inventing reaction conditions, catalysts or a unique repeating-unit structure.
Maleation-related chemistry can introduce additional acid or anhydride functionality into an unsaturated organic feedstock. The resulting distribution can depend on feedstock and processing. This general chemistry explains why composition, acid value and residuals are relevant without defining a manufacturing recipe for the commercial grade.
A generic maleated fatty acid is not automatically a drop-in replacement. Functional-group distribution, residual components, viscosity and compatibility can influence the intended network. Equivalence should be demonstrated in the actual formulation rather than inferred from a broad chemical family.
The documented bio-based carbon content is 86%. This refers to the origin of the carbon fraction, not a claim that 86% of the entire product mass is renewable material. It does not independently demonstrate biodegradability, compostability, low toxicity or a specified carbon-footprint reduction.
When a sustainability-related declaration is needed, confirm the measurement or calculation basis and its scope for the supplied grade. Keep origin-of-carbon information separate from occupational classification, environmental behavior and finished-product compliance.

CLASSIFICATION AND REGULATORY CONSIDERATIONS

Review date for this profile: 15 October 2026. BYK P 105 is a commercial mixture, so no single EU harmonized substance entry or invented Annex VI index number is assigned to the complete grade. Its supplied classification is determined using the applicable mixture rules and composition information.
The EU safety document available during this review is version 10.0, revised 21 August 2024. It classifies BYK P 105 as Skin Irrit. 2, H315, and Skin Sens. 1, H317. The signal word is Warning. These hazards mean that contact can irritate the skin and may cause an allergic skin reaction.
The reportable components include residual maleic anhydride, whose own hazard classification includes additional endpoints. Component classifications must not automatically be copied onto the finished mixture. Equally, a commercial grade described as solvent-free is not thereby free from sensitization or other occupational concerns.

Use the current regional SDS for the actual consignment before preparing labels, exposure procedures or shipping documents. A document for a separately formulated solution does not establish the classification of BYK P 105 as supplied. A later revision may also change details from those summarized here.
Composition-based regulatory information dated 15 October 2024 calculates VOC at approximately 1% under the stated European method. This is not a zero-VOC certification and should not be equated with the oven mass loss. Different jurisdictions and finished-product categories can use different definitions.
Chemical-inventory and REACH statements concern substances and the relevant supply chain. They are not approvals for every intended end use. Confirm coverage and restrictions for the destination market, and distinguish proposals or pending assessments from legally effective requirements.

FOOD-CONTACT AND OTHER REGULATED USES

Grade-specific food-contact information addresses selected adhesive, coating, paper and plastics frameworks. For the United States, relevant statements include 21 CFR 175.105 for adhesives and 21 CFR 175.300 for resinous and polymeric coatings. These are conditional application frameworks, not direct-food authorization for BYK P 105.
The particular material category, use amount, contact conditions and finished-article requirements must be checked. A statement addressing an adhesive cannot simply be transferred to a coating, and a food-contact application cannot be treated as permission to add the material to food itself.
European food-contact assessment distinguishes substance listing, any national provisions, the material's composition and the obligations for the final article. Where a statement refers to Regulation (EU) No 10/2011, that reference does not eliminate migration or other applicable requirements. The actual grade-specific statement should be reviewed for its conditions.

No cosmetic, pharmaceutical, medical-device or drinking-water suitability is assigned here without separate documentation. A useful wetting and dispersing function does not establish toxicological acceptability for a sensitive exposure route. Industrial qualification and regulated-product qualification are different decisions.
Purchasing and formulation records should identify the exact grade and the applicable compliance statement. A generic product name, a historical certificate or the absence of an external solvent carrier is insufficient to establish compliance of a new finished product.

SAFETY AND HANDLING

Avoid direct skin contact with BYK P 105 and minimize opportunities for repeated contamination. Skin sensitization is a central handling concern, and an absence of immediate discomfort does not establish acceptable exposure. Use a work method that keeps the material off hands, clothing and frequently touched surfaces.
Wear suitable eye protection, protective gloves and clothing according to the current SDS and task assessment. Glove performance depends on material, condition and exposure duration. Replace contaminated protection appropriately and do not use an organic solvent to clean the skin.
Provide ventilation appropriate to charging, mixing and any warming operation. Low ambient vapor pressure does not establish that all heated handling is free from exposure. Avoid breathing mist or vapor and select respiratory protection, if needed, within a suitable workplace program.
Use controlled heating and suitable transfer equipment for the viscous liquid. The flash point above 110 °C is not a recommended process temperature and does not mean the material cannot burn. Hot material can also present a thermal hazard independent of its chemical classification.
Keep the additive away from strong oxidizers and prevent unplanned contact with incompatible reactive materials. Deliberate neutralization or blending with highly reactive components requires a formulation and process assessment. The commercial grade's stability in storage does not establish compatibility with every reagent.
Maintain appropriate hygiene and promptly clean contaminated work areas. Workers who develop a rash or other symptoms should obtain medical assessment and have their exposure conditions reviewed. Training should address sensitization, correct handling and the difference between the neat grade and any prepared solution.

FIRST AID

Skin contact
Remove contaminated clothing and wash the skin thoroughly with soap and water. Do not use solvents for cleaning. Seek medical advice if irritation persists or an allergic reaction is suspected, and ensure contaminated clothing is properly cleaned or disposed of.

Eye contact
Rinse promptly with clean water while holding the eyelids open. Remove contact lenses if easy to do and continue rinsing. Obtain medical attention for persistent irritation or a significant exposure and provide the product information.

Inhalation
Move the affected person to fresh air without exposing rescuers to danger. Seek medical advice if symptoms persist, particularly after mist or heated-material exposure. Emergency breathing assistance should be given only by trained personnel with appropriate protection.

Ingestion
Rinse the mouth and obtain prompt advice from a poison service or medical professional. Do not induce vomiting unless specifically directed. Never give anything by mouth to an unconscious person; provide the current SDS and exposure details to the treating professional.

STORAGE AND TRANSPORT

Store and transport BYK P 105 below 50 °C as stated in the current technical instructions. Keep containers tightly closed in a dry, suitably ventilated location and protect them from contamination and inappropriate heat. Storage conditions should follow the grade-specific documentation rather than a generic policy for all resin additives.
The listed shelf life is 60 months in unopened original packaging under the specified conditions. Decanting or reopening a container does not start a new shelf-life period. Stock rotation should follow the actual batch information and the condition of the packaging.
Inspect material before use if storage history is uncertain. Changes in appearance or handling should be assessed against the specification rather than corrected by arbitrary dilution. Adding solvent changes the supplied grade and can change compatibility, dosage basis and hazards.
The reviewed EU safety documentation does not classify BYK P 105 as dangerous goods for transport. No UN number or packing group is assigned on that basis. This shipping status does not remove the handling hazards and should be confirmed against the current regional SDS for the actual consignment.
A separately prepared solution can have a different transport classification because its carrier and composition differ. Do not transfer the neat grade's shipping status to such a preparation without assessment. Packaging must remain suitable for the liquid, temperature and route.

SPILL MANAGEMENT AND FIRE RESPONSE

Restrict access to a spill and prevent direct skin contact. Trained personnel should contain the viscous liquid using suitable compatible materials and keep it out of drains, soil and waterways. A spill can also create a slip hazard and spread contamination through footwear or equipment.
Collect recoverable material and contaminated absorbent in appropriate labeled containers. Do not return recovered spill material to clean stock. Avoid washing residues into the drainage system; contaminated washwater must be handled through the site's approved waste route.
For a larger release, unusual reaction or heated-material incident, use the site's emergency procedure and trained response resources. A non-dangerous-goods transport status is not a reason to treat every release as routine housekeeping. The actual exposure and environmental conditions govern the response.
Suitable extinguishing media can include foam, dry chemical, carbon dioxide or appropriate water spray according to the fire and current SDS. Combustion can produce hazardous gases. Firefighters require protective equipment and breathing apparatus, and contaminated firewater should be contained where feasible.
Dispose of residues and packaging through the applicable waste-management route. Do not assume that solvent-free or bio-based-carbon information makes the waste suitable for ordinary drainage or uncontrolled disposal. The waste's actual composition and contamination must be considered.

ENVIRONMENTAL CONSIDERATIONS

Prevent releases of BYK P 105 and formulations containing it to soil, drains and surface waters. Immiscibility does not prevent material from being transported with contaminated water or associating with sediments and organic matter. Containment and suitable waste handling remain necessary.
The reviewed safety information does not support a general readily biodegradable claim for the complete grade. Data on individual constituents do not establish the behavior of the entire commercial material. Likewise, the bio-based carbon figure describes origin rather than the rate or completeness of environmental degradation.
In finished adhesives or cured resins, release and exposure depend on incorporation, residual components, contact conditions and end-of-life handling. Successful formulation use does not establish an environmentally harmless finished product. Relevant environmental and emissions obligations should be assessed for the actual material and process.

COMMON FORMULATION PROBLEMS

The dose was calculated on total formulation
Recalculate from filler mass using the documented starting range. A formulation with 40% filler does not receive the same additive mass as one with 80% filler at the same filler-based percentage. Record the basis explicitly.

Settling persists during storage
Check filler surface, particle-size distribution, addition order and the tested dose range. Assess low-shear structure and redispersibility rather than relying on one viscosity reading. The intended network may be inadequate or poorly developed.

The formulation becomes too structured
Review dose, solids loading, basic ingredients and other rheology additives. Increased low-shear viscosity can support suspension while making dispensing or leveling unacceptable. Optimize the full balance instead of maximizing network strength.

White spirit causes haze or separation
Treat this as a compatibility issue consistent with the documented limitation. Test the complete solvent blend and dilution sequence. Do not assume that additional BYK P 105 will restore compatibility.

Late addition gives little improvement
The recommended process places the additive in the liquid phase before solids. A late addition may not reproduce the same particle interactions. Compare addition sequences under controlled conditions before changing the full production batch.

Pump delivery is inconsistent
Check material temperature, viscosity, line retention and pump calibration. Verify the actual delivered mass. Controlled warming may help flow, but arbitrary overheating or solvent dilution changes the handling basis.

Cure behavior changes
Review acid interactions and the complete resin, hardener or initiator system. BYK P 105 is not assigned a universal cure equivalent. Test pot life and final properties before making compensating stoichiometric changes.

Pigment color or gloss changes
Controlled flocculation and complete deflocculation serve different objectives. Review whether the selected additive and dose fit the optical requirements. Confirm color development, rub-out behavior and storage stability rather than judging only settling.

Air is retained in a filled paste
Filler stabilization does not replace deaeration. Review mixing, viscosity, structural recovery and the time before cure. A separate compatible air-release strategy may be required and should be qualified with the dispersion package.

An aqueous formulation is proposed
Do not infer direct water compatibility from the presence of acid groups. The supplied grade is described as water-immiscible. Any neutralized or water-reducible preparation needs separate development and qualification.

Acid value and pH appear inconsistent
They measure different attributes under different preparation conditions. Confirm the analytical methods before drawing a conclusion. A typical acid value is not a prediction of the pH of every dilution.

Solvent-free is interpreted as zero VOC
Keep delivery-form terminology, oven residue and the regulatory VOC calculation separate. The reviewed composition statement calculates about 1% VOC under its method. Finished-product claims need the applicable definition and evidence.

Bio-based carbon is interpreted as biodegradability
The 86% figure refers to carbon origin. It does not establish compostability, ready biodegradation or low hazard. Use a separate environmental assessment for those claims.

A solution's SDS is used for the neat grade
Confirm exact product identity and delivery form. A separately formulated solution can have different ingredients and hazards. Use the consignment-specific documentation for BYK P 105 as supplied.

FREQUENTLY ASKED QUESTIONS

What is BYK P 105?
BYK P 105 is an acid-functional wetting and dispersing additive that promotes controlled flocculation of fillers in suitable formulations.

What is its chemical description?
It is described as a lower-molecular-weight unsaturated polycarboxylic acid polymer.

Is it a pure substance with one molecular formula?
No. The commercial grade is treated as a mixture and is not assigned one fixed molecular formula here.

Does it have one exact molecular weight?
No. Its distributed composition cannot be represented by one exact molecular weight.

Can a component CAS Number be used as the whole product's identity?
No. Component identifiers should be distinguished from the complete commercial formulation.

What is the typical density?
The current technical data give approximately 1.045 g/cm3 at 20 °C.

What is the typical non-volatile matter?
The documented typical value is 98.5% after 10 minutes at 150 °C.

What is the acid value?
The typical acid value is 365 mg KOH/g, subject to the applicable analytical method and specification.

Is acid value the same as pH?
No. Acid value measures titratable acidity per mass, while pH depends on a defined measurement medium.

What is the flash point?
The documented flash point is above 110 °C; this is not a recommended heating temperature.

Why is the material difficult to pump?
BYK P 105 is highly viscous, and its flow and metering depend on temperature and equipment.

Can it be warmed before processing?
Controlled warming is described for improved flow, using approved handling conditions and appropriate temperature control.

What storage and transport temperature is specified?
The current technical instruction is to store and transport below 50 °C.

What is controlled flocculation?
It is additive-mediated particle association used to create a useful network rather than uncontrolled compact agglomeration.

Does BYK P 105 aim for complete deflocculation?
No. Its principal documented function deliberately uses controlled particle interactions to support filler stability.

What benefits are intended?
The main intended benefits are filler stabilization and reduced settling and sagging in compatible systems.

What is the starting dosage?
The documented range is 0.5-1.5% supplied additive based on filler mass.

Is that percentage based on total formulation?
No. The current recommendation is filler-based, so the total-formulation percentage depends on filler loading.

How much is indicated for 40 kg filler?
The starting range corresponds to 0.20-0.60 kg BYK P 105, with the optimum determined through testing.

When should it be added?
For optimum performance, introduce it into the liquid mill base before the pigments or fillers.

Which adhesive systems are documented?
Acrylate adhesives are particularly recommended, and polyurethane adhesives are also identified.

Can it be used in thermosets?
Suitable ambient-curing resin systems, particularly acrylate systems, are documented applications.

Is it a curing agent?
No curing-agent function or universal cure equivalent is assigned to BYK P 105.

Is it compatible with white spirit?
White-spirit-based and white-spirit-diluted systems have documented compatibility limitations.

Is it water-soluble?
The reviewed safety documentation describes the supplied grade as immiscible with water.

Does solvent-free mean absolutely zero VOC?
No. The reviewed composition statement calculates approximately 1% VOC under its stated method.

What does 86% bio-based carbon mean?
It describes the origin of the carbon fraction, not 86% renewable product mass or proof of biodegradability.

What are the main documented handling hazards?
The reviewed EU SDS classifies the mixture for skin irritation and skin sensitization.

Is it regulated as dangerous goods for transport?
The reviewed EU SDS does not classify the supplied grade as dangerous goods; confirm the current consignment-specific status.

Where can grade-specific technical and supply information be obtained?
Contact Ataman Chemicals for the applicable specification, TDS, SDS, COA and commercial supply information.

FINAL TECHNICAL SUMMARY

BYK P 105 is a concentrated, acid-functional wetting and dispersing additive whose principal role is controlled filler flocculation. It is especially relevant to acrylate adhesives and ambient-curing acrylate resins, with polyurethane adhesives also documented. Its intended benefit is a useful particle network that helps resist settling and sagging while allowing practical processing and application.
The commercial grade is a distributed mixture rather than a defined molecule with one exact formula or molar mass. Current typical data include density of 1.045 g/cm3 at 20 °C, non-volatile matter of 98.5% under the specified method, acid value of 365 mg KOH/g and flash point above 110 °C. The acid value describes titratable functionality and must not be mistaken for a molecular weight or cure equivalent.
The correct dosing basis is essential: the 0.5-1.5% starting range applies to filler mass. Addition before the solids supports the intended interaction, while late correction requires separate evaluation. High viscosity, documented white-spirit limitations and possible interactions with other acid-sensitive or basic formulation ingredients all influence practical use.

Qualification should measure storage homogeneity, redispersibility, low-shear structure, application flow and cured properties. A higher viscosity alone does not establish a better formulation. The best result balances suspension and sag resistance with wetting, dispensing, cure and final performance.
Handling must address skin irritation and sensitization, and storage and transport should remain below 50 °C under the current instructions. The listed 60-month shelf life applies to unopened original packaging under specified conditions. Solvent-free delivery and 86% bio-based carbon should be interpreted precisely rather than converted into unsupported zero-emission or biodegradability claims.
For BYK P 105 technical specifications, TDS, SDS, COA and commercial supply, contact Ataman Chemicals. Select the grade and documentation against the actual filler package, resin system, processing conditions and intended market.

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