ARADUR 46-1S

ARADUR 46-1S is a legacy cycloaliphatic polyamine epoxy curing agent developed for civil-engineering, industrial-maintenance and marine-coating systems that require faster ambient cure than ARADUR 46-1 while retaining a similar active-hydrogen equivalent weight. Published selector data describe ARADUR 46-1S with approximately 220-320 mPa·s viscosity at 25°C, 310-340 mg KOH/g amine value, an active-hydrogen equivalent weight of approximately 95 g/eq, an approximately 25-minute reference gel time with ARALDITE GY 250 and Gardner color ≤3. ARADUR 46-1S is particularly relevant to fast-curing protective coatings, industrial maintenance, marine coatings, flooring, repair systems and other ambient-cure epoxy applications where low viscosity, rapid film development and practical wetting are important.

PRODUCT IDENTITY

Product name: ARADUR 46-1S
Product type: Epoxy curing agent / hardener
Chemical family: Polyamines
Specific chemistry: Cycloaliphatic polyamine
Product status in available literature: Legacy grade documented in older ambient-curing selector literature
Current documentation note: Current public product-document catalogs list ARADUR 46-2 S rather than ARADUR 46-1S; the 46-1S data in this profile are therefore based on the exact legacy-grade selector data and should not be silently replaced with 46-2 S values
Physical form: Liquid
Appearance: Low-viscosity liquid
Color: Gardner ≤3
Viscosity at 25°C: Approximately 220-320 mPa·s
Amine value: Approximately 310-340 mg KOH/g
Active hydrogen equivalent weight: Approximately 95 g/eq
Reference gel time: Approximately 25 minutes with ARALDITE GY 250 under the published selector comparison method
Primary cure mode: Fast ambient-temperature cure
Primary established application sectors: Civil engineering, industrial maintenance and marine coatings
Primary functions: Curing agent, hardener and crosslinker
Benzyl alcohol status: Published selector data do not mark ARADUR 46-1S as benzyl-alcohol-free, so that claim should not be made without product-specific documentation
Historical family-level restricted-substance positioning: Older selector literature stated that the products in that brochure were nonylphenol-free, phenol-free and tert-butyl-phenol-free and included broader BPA/BPF-related statements subject to stated exceptions; current product-specific confirmation should control any formal claim
Density: Use the current or archived product-specific TDS/SDS if available; no sufficiently reliable product-specific value was verified for this profile
Flash point: Use the current or archived product-specific SDS if available; no sufficiently reliable product-specific value was verified for this profile
Storage: Keep in the sealed original container under dry, controlled conditions and follow the current or archived product-specific TDS/SDS
CAS Number: Commercial cycloaliphatic polyamine formulation; no single universal CAS number should be assigned to the complete trade grade without product-specific SDS confirmation
EC Number: Commercial formulated amine product; no single universal EC number should be assigned without product-specific confirmation
Molecular Formula: Not applicable to the complete commercial formulation
Molecular Weight: Variable / not applicable as one fixed value

Synonyms: ARADUR 46-1S, Cycloaliphatic Polyamine Hardener, Fast Cycloaliphatic Polyamine Curing Agent, Fast-Cure Epoxy Hardener, Ambient-Cure Epoxy Hardener, Marine Epoxy Hardener, Industrial Maintenance Epoxy Hardener, Civil-Engineering Epoxy Hardener, Low-Viscosity Epoxy Curing Agent, Rapid-Cure Polyamine Hardener, Protective-Coating Hardener, Epoxy Crosslinker
ARADUR 46-1S should be treated as a formulated commercial curing agent rather than as one pure molecular substance. Published selector values for viscosity, amine value, AHEW, gel time and color are the most reliable public identifiers for the exact legacy grade. Formal composition, component identities, hazard classification and regulatory statements should be taken from product-specific SDS or archived technical documentation where available.

WHAT IS ARADUR 46-1S?

ARADUR 46-1S is a fast ambient-cure cycloaliphatic polyamine hardener for epoxy systems. The grade was positioned for civil engineering, industrial maintenance and marine coatings, which indicates a performance profile centered on rapid cure, strong adhesion, practical film formation and protective use under industrial conditions.
ARADUR 46-1S has an AHEW of approximately 95 g/eq, essentially matching ARADUR 46-1, but its reference gel time is much shorter. Published selector data give approximately 25 minutes for ARADUR 46-1S compared with approximately 38 minutes for ARADUR 46-1.
The grade therefore provides faster reaction while maintaining a similar theoretical stoichiometric demand with the same epoxy resin. ARADUR 46-1S should not be confused with ARADUR 46-2 S. Current public documentation lists 46-2 S, whereas 46-1S appears in older selector literature with its own distinct viscosity and amine-value ranges.

CYCLOALIPHATIC POLYAMINE CHEMISTRY

Cycloaliphatic polyamines contain reactive amine functionality associated with cyclic aliphatic molecular structures. This chemistry can provide a useful balance of ambient-temperature reactivity, mechanical strength, chemical resistance and relatively low color.
Compared with many polymeric polyamidoamines, cycloaliphatic polyamines often have lower viscosity and faster hardness development. The commercial hardener is formulated rather than represented accurately by one pure molecule, so product-specific AHEW and amine value are essential for stoichiometric work.
The approximately 95 g/eq AHEW indicates a relatively high concentration of reactive amine hydrogen and explains why moderate hardener levels can cure standard liquid epoxy resins. The exact molecular composition should not be reconstructed from generic cycloaliphatic amine chemistry.

HOW EPOXY CURING WORKS

Epoxy resins contain reactive oxirane rings. Primary and secondary amine hydrogens in ARADUR 46-1S attack these rings and form carbon-nitrogen bonds and hydroxyl groups.
Repeated reaction between multifunctional epoxy resin and multifunctional hardener creates a three-dimensional thermoset network. The mixture progresses from a processable liquid through viscosity increase and gelation into a solid cured material.
Cure continues after gelation, so hardness, chemical resistance, water resistance and mechanical properties continue developing after the surface becomes tack-free. The faster cure of ARADUR 46-1S shortens the working window compared with ARADUR 46-1 but can provide earlier handling and recoat potential.

FAST-CURE CHARACTER

The defining performance characteristic of ARADUR 46-1S is faster cure relative to ARADUR 46-1. Published selector data show approximately 25 minutes gel time with ARALDITE GY 250 for ARADUR 46-1S, compared with approximately 38 minutes for ARADUR 46-1.
The faster cure can improve productivity in maintenance coatings, floor repairs, primers and civil-engineering applications. Shorter gel time also means less time for mixing, application, leveling and air release.
The grade is therefore best used where the application process can keep pace with the chemistry. For large floor areas or complex assemblies, a slower hardener may be operationally easier even if the final cured properties are similar.

VISCOSITY

ARADUR 46-1S has a published viscosity of approximately 220-320 mPa·s at 25°C. This is low enough for easy pumping, metering and mixing while remaining slightly more viscous than ARADUR 46-1.
Low viscosity improves substrate wetting and facilitates incorporation into pigments, fillers and mineral aggregate. In self-leveling flooring, low binder viscosity helps the material spread before gelation.
In vertical coatings, rheology modifiers may be required to prevent sag because the reactive binder is relatively fluid. Temperature should be standardized during quality-control testing because viscosity falls as temperature rises.

AMINE VALUE

ARADUR 46-1S has a published amine value of approximately 310-340 mg KOH/g. Amine value is a titration-based measure of basic nitrogen functionality expressed as an equivalent quantity of potassium hydroxide.
The range is the same as the published ARADUR 46-1 range even though the two products have different chemistry descriptions and gel times. This demonstrates why amine value alone cannot predict cure speed.
Amine value is useful for incoming quality control, but AHEW and gel time are also needed to characterize the hardener properly. A significant deviation from the expected range can indicate contamination, dilution, aging or incorrect material.

ACTIVE HYDROGEN EQUIVALENT WEIGHT

The active-hydrogen equivalent weight of ARADUR 46-1S is approximately 95 g/eq. AHEW represents the mass of commercial hardener required to provide one equivalent of reactive amine hydrogen.
For a resin with EEW 190 g/eq, the theoretical starting point is approximately 50 parts ARADUR 46-1S per 100 parts resin. At EEW 185 g/eq the theoretical value is approximately 51.4 parts, and at EEW 200 g/eq it is approximately 47.5 parts.
These calculations are only stoichiometric starting points. Commercial resin blends, reactive diluents and intentional off-ratio design can change the practical formulation.

GEL TIME

Published selector literature gives ARADUR 46-1S an approximate 25-minute gel time with ARALDITE GY 250. The selector method is intended for comparison between curing agents under standardized conditions.
The value should not be treated as a universal field pot life. A coating can lose ideal flow, wetting or sprayability before formal gelation.
Large mixed batches can cure faster because reaction heat accumulates and raises the mixture temperature. Practical working time should therefore be determined with the final formulation at realistic batch size and temperature.

COLOR

ARADUR 46-1S has a Gardner color limit of approximately 3 in published selector data. This relatively low color makes the grade suitable for pale pigmented systems and industrial finishes where hardener color should not dominate the final appearance.
Color stability also depends on the epoxy resin, pigments, additives and cure conditions. Conventional epoxy networks can yellow under ultraviolet exposure even when the hardener begins with low color.
Exterior decorative use should therefore consider a weather-resistant finish layer where long-term color retention is important.

APPLICATIONS

Civil-engineering coatings
Civil engineering is a primary documented application sector. ARADUR 46-1S can be used in rapid-cure epoxy systems for concrete protection, repair and bonding where the application process can accommodate a short working window.

Industrial maintenance coatings
Industrial maintenance is a primary documented sector. Machinery, steel structures and plant equipment can use fast-curing epoxy coatings where downtime must be minimized.

Marine coatings
Marine coatings are also a documented application sector. Prepared steel and compatible marine substrates can use ARADUR 46-1S systems where rapid ambient cure and protective performance are required.

Anti-corrosion primers
Fast-curing anti-corrosion primers can use ARADUR 46-1S with suitable epoxy resin, corrosion-inhibitive pigments and properly prepared steel.

Steel primers
Abrasive-blasted steel can be protected with compatible epoxy primers based on ARADUR 46-1S.

Direct-to-metal coatings
DTM coatings can be formulated where adhesion, barrier protection and rapid cure are required in a single coating layer.

Structural-steel coatings
Beams, frames and industrial steel structures can use compatible ARADUR 46-1S coating systems.

Shipbuilding coatings
The documented marine-coating positioning makes shipbuilding and marine maintenance technically relevant application areas, subject to full formulation validation.

Marine maintenance coatings
Repair work on vessels and marine structures can benefit from rapid ambient cure when substrate preparation and environmental conditions are suitable.

Coastal infrastructure coatings
Steel exposed to coastal atmosphere can use compatible anti-corrosion systems where salts are removed and film build is sufficient.

Bridge-maintenance coatings
Civil-engineering and industrial-maintenance positioning makes bridge steel and related infrastructure relevant applications.

Concrete primers
Low-viscosity epoxy systems can wet prepared concrete and create a bonded base for later layers.

Concrete protective coatings
Industrial concrete can use ARADUR 46-1S epoxy systems where fast cure and chemical resistance are required.

Concrete repair
Fast-curing repair compounds can use the hardener where small batch size and rapid placement are practical.

Epoxy mortars
Mineral-filled mortars can use ARADUR 46-1S when aggregate wetting and fast ambient cure are desired.

Rapid repair mortars
Small repair zones are a good fit because the short gel time can be managed more easily than on very large surfaces.

Floor primers
Fast-curing primers can reduce waiting time before subsequent flooring layers.

Industrial flooring
ARADUR 46-1S can be used in compatible industrial flooring systems where early hardness and short turnaround are important.

Self-leveling floors
Low binder viscosity can support self-leveling formulations, but the roughly 25-minute reference gel time means batch size and application area must be planned carefully.

Broadcast floors
Broadcast-aggregate systems can use fast-cure primer or body coats when aggregate is applied before the surface closes.

Quartz-filled flooring
Silica or quartz filler can be incorporated where the formulation retains enough working time for complete wetting.

Workshop floors
Workshops can use rapid-cure epoxy flooring where long shutdowns are undesirable.

Warehouse floors
Localized repair or fast-turnaround flooring can use ARADUR 46-1S when the application crew can manage the shorter pot life.

Plant-room floors
Mechanical and service areas can use durable rapid-cure floors where chemical resistance and adhesion are required.

Epoxy screeds
Highly filled screeds can use the hardener when mixing, spreading and finishing are coordinated tightly.

Floor toppings
Protective toppings can combine ARADUR 46-1S with graded aggregate for mechanical strength and abrasion resistance.

Epoxy grouts
Fast-curing grouts can use ARADUR 46-1S when flow and exotherm are validated.

Machinery-base grouts
Equipment-base grouting can benefit from rapid cure, although thick-section temperature rise must be checked.

Anchoring compounds
Fast-curing epoxy anchor systems can use cycloaliphatic polyamine chemistry where load-development performance is validated.

Adhesives
Two-component adhesives can use ARADUR 46-1S where rapid fixture and ambient cure are beneficial.

Structural adhesives
Structural bonding can use the grade when assembly and clamping can be completed before viscosity rises significantly.

Metal bonding
Prepared steel and aluminum can be bonded using suitable epoxy formulations.

Concrete-to-metal bonding
Low viscosity can help wet both mineral and metallic surfaces in repair and reinforcement applications.

Construction adhesives
Civil-engineering adhesive systems can use ARADUR 46-1S where rapid cure is an advantage.

Patch compounds
Filled patching products can use the hardener for quick repair of damaged concrete or industrial floors.

Mastics
Thixotropic mastics can use ARADUR 46-1S for vertical or overhead repair where rapid set is useful.

Protective mastics
High-build protective mastics can combine fast cure with pigments and fillers when sag and pot life are controlled.

Barrier coatings
Dense epoxy films can reduce transport of water, oxygen and ions through a protective coating.

Zinc-phosphate primers
Inhibitive pigments can supplement the barrier properties of an ARADUR 46-1S epoxy system.

Lamellar-pigment primers
Mica and micaceous iron oxide can lengthen diffusion paths in heavy-duty coatings.

High-build coatings
Low hardener viscosity can support high-solids systems where thick films are required.

High-solids coatings
ARADUR 46-1S can be used in compatible high-solids technology when viscosity and cure speed remain manageable.

Solvent-free systems
Compatible solvent-free resin systems can be formulated when the exact hardener composition and final mixed viscosity are suitable.

Low-VOC coatings
Low hardener viscosity can reduce reliance on additional solvent and support lower-VOC design.

Production-line primers
Fast cure can shorten handling time in controlled production where mixing and application are standardized.

Factory-applied coatings
Automated or tightly controlled application can exploit the grade's rapid cure more easily than slow manual field work.

Maintenance repair kits
Premeasured small-pack repair products can use ARADUR 46-1S because smaller batch volume helps manage exotherm and short pot life.

Composite repair
Small wet-lay-up repairs can use the hardener where reinforcement can be fully wetted within the short working window.

General fast-cure epoxy systems
Other applications are possible where resin compatibility, stoichiometry, batch size and application speed are validated.

ARALDITE GY 250 REFERENCE SYSTEM

ARALDITE GY 250 is the reference resin used in the published selector comparison for ARADUR 46-1S. The standardized test gives an approximate gel time of 25 minutes.
The result provides a useful reactivity benchmark but does not establish a universal production ratio or field pot life. With AHEW approximately 95 g/eq, a standard liquid epoxy resin near EEW 190 g/eq would have a theoretical hardener level around 50 phr.
The actual production formulation should be based on the precise resin EEW and any reactive diluent content. Performance validation should include cure speed, surface appearance, adhesion, chemical resistance and application working time.

COMPARISON WITH ARADUR 46-1

ARADUR 46-1 is described as a polyamine adduct, while ARADUR 46-1S is described as a cycloaliphatic polyamine in the legacy selector literature.
ARADUR 46-1 has approximately 130-230 mPa·s viscosity, while ARADUR 46-1S has approximately 220-320 mPa·s.
Both have a published amine value of approximately 310-340 mg KOH/g and AHEW of approximately 95 g/eq.
ARADUR 46-1 gives approximately 38 minutes reference gel time, while ARADUR 46-1S gives approximately 25 minutes.
The S grade is therefore faster and slightly more viscous while preserving similar theoretical hardener demand. Equal AHEW does not mean identical application behavior.

COMPARISON WITH CURRENT ARADUR 46-2 S

Current public product-document catalogs list ARADUR 46-2 S rather than ARADUR 46-1S.
Current selector information for ARADUR 46-2 S gives a different specification set, so its values should not be substituted automatically for ARADUR 46-1S.
The legacy ARADUR 46-1S data are approximately 220-320 mPa·s viscosity, 310-340 mg KOH/g amine value, 95 g/eq AHEW, 25-minute gel time and Gardner ≤3.
The currently listed ARADUR 46-2 S should be treated as a separate commercial grade unless formal product documentation explicitly states equivalence or succession.
For procurement, substitution or formulation transfer, Ataman Chemicals should verify the exact grade documentation before any direct replacement is made.

MIX-RATIO CALCULATION

The theoretical hardener demand is calculated from AHEW and resin EEW. The relationship is parts ARADUR 46-1S per 100 parts resin = 100 × 95 / resin EEW.
At EEW 180 g/eq the theoretical value is approximately 52.8 parts hardener. At EEW 190 g/eq the value is approximately 50.0 parts. At EEW 200 g/eq the value is approximately 47.5 parts.
Validated resin-specific formulation guidance should take precedence where available.

EFFECT OF HARDENER RATIO

Too little hardener can leave unreacted epoxy functionality and reduce cure completeness. Too much hardener can leave residual amine functionality and can increase polarity or water sensitivity.
Off-ratio cure can affect hardness, toughness, chemical resistance, adhesion and thermal performance. Accurate weighing is especially important in fast-curing systems because there is less time to identify and correct a mixing problem.
Intentional ratio changes should be supported by testing rather than used as a simple way to change cure speed.

POT LIFE

The approximately 25-minute reference gel time indicates a relatively short working window. Practical pot life can be shorter if the formulation requires excellent leveling, low viscosity or complete aggregate wetting.
Warm conditions, large mixed mass and catalytic pigments can shorten the window further. Small batch size is therefore particularly important with ARADUR 46-1S.
The application crew should be ready before the components are mixed. Material that has exceeded its validated working time should not be diluted or reworked for application.

EXOTHERM CONTROL

Epoxy-amine cure is exothermic. Fast-curing systems can develop internal heat quickly in large batches or thick sections.
As temperature rises, reaction rate increases further and pot life can collapse rapidly. Mineral filler can moderate temperature rise in mortars and grouts by absorbing heat and reducing reactive binder fraction.
Unfilled adhesive or coating batches should be kept small enough to remain manageable. Mixed material should not be left to react in deep sealed containers.

TEMPERATURE EFFECTS

Warm resin and hardener have lower viscosity but react more quickly. Cold materials provide more working time but can become harder to spread and can develop final properties more slowly.
ARADUR 46-1S should therefore be handled within a controlled component-temperature range. Direct sunlight or hot storage before mixing can reduce pot life dramatically.
Substrate temperature also affects cure speed and flow. Qualification should include the minimum and maximum intended application temperatures.

SELF-LEVELING FLOOR DESIGN

ARADUR 46-1S can support self-leveling floor systems because its viscosity is low and it wets mineral filler effectively.
The short cure time requires careful formulation so the material can flow and release air before gelation. Large floor areas can be challenging because each batch must be spread quickly.
Rheology modifier should provide enough low-shear structure to prevent filler settlement without preventing leveling. Warm slabs shorten open time and can create roller marks or visible batch transitions.
A slower hardener may be operationally preferable for very large continuous floors.

MORTARS AND GROUTS

Fast-curing mortars and grouts are technically relevant applications for ARADUR 46-1S.
Silica, quartz and graded aggregate can reduce shrinkage, control exotherm and increase compressive strength. The low-viscosity hardener helps wet mineral particles before the mixture advances too far.
Preblended dry aggregate can shorten field mixing time and improve consistency. Thick sections should be checked for peak internal temperature.
Placement, compaction and finishing must be completed within the validated working window.

ADHESION

Cycloaliphatic amine-cured epoxy systems can provide strong adhesion to properly prepared metal and mineral substrates.
Low viscosity supports intimate wetting of surface texture. Concrete should be sound and free from weak laitance, oil and curing compounds.
Steel should be free from grease, salts, rust and loose scale and should have the required blast profile.
Adhesion should be evaluated after full cure and after environmental exposure where service is demanding. Fast cure cannot compensate for contamination at the interface.

CHEMICAL RESISTANCE

Properly cured cycloaliphatic polyamine epoxy systems can provide strong chemical resistance.
The final resistance profile depends on resin chemistry, hardener ratio, cure completeness and film thickness.
Water, oils, salts and many industrial cleaners can be tolerated by suitable formulations. Aggressive solvents, acids, oxidizers or hot chemicals require dedicated testing.
A coating that survives splash exposure may not be suitable for continuous immersion. Full cure should be reached before severe chemical service begins.

CORROSION PROTECTION

Marine and industrial-maintenance positioning makes corrosion protection an important application area.
The cured epoxy binder forms a barrier against water, oxygen and ionic contaminants. Strong adhesion helps limit lateral corrosion beneath the coating.
Zinc phosphate, micaceous iron oxide and other protective pigments can supplement binder performance.
Coating continuity and dry-film thickness remain essential. Salt-spray and cyclic-corrosion testing should be carried out on the final formulation.

PIGMENTS AND FILLERS

ARADUR 46-1S can be used with compatible pigments and mineral fillers.
Titanium dioxide, iron oxides, zinc phosphate, barytes, talc, silica, mica and micaceous iron oxide are typical classes that may be evaluated.
Pigment surfaces can alter pot life or viscosity by interacting with amine or dispersant. Fast cure means the complete pigment package should be tested rather than relying on neat-resin gel time.
High filler loading can increase apparent body and reduce exotherm but can also reduce flow. Soluble-salt contamination should be minimized in anti-corrosion systems.

RHEOLOGY CONTROL

ARADUR 46-1S is relatively fluid, so the final formulation may require deliberate rheology control.
Vertical coatings and mastics require anti-sag structure. Self-leveling floors require controlled flow rather than strong thixotropy.
Fumed silica, organoclays, polymeric thixotropes and fine mineral filler can be used where compatible.
Excessive structure can interfere with wetting and air release. Rheology should be monitored through the short practical pot-life period.

DEFOAMING AND AIR RELEASE

Fast cure gives bubbles less time to escape before the material becomes immobile.
Mixing should therefore minimize unnecessary air incorporation. Suitable defoamers can help, but excessive dosage can create craters or reduce intercoat adhesion.
Porous concrete can release air into a wet coating, causing pinholes. Priming and application during stable or falling substrate temperature can reduce concrete outgassing.
Self-leveling systems should be deaerated promptly after placement.

SURFACE PREPARATION

Steel and concrete preparation remain essential despite the fast cure of ARADUR 46-1S.
Steel should be cleaned to remove oil, salts, rust and weak scale. Concrete should be mechanically sound and free from laitance, dust and curing compounds.
Surface moisture should be evaluated because not every cycloaliphatic polyamine system is automatically qualified for wet-substrate application.
Marine substrates require especially careful salt control. The final coating specification should define the required surface profile and environmental limits.

AMINE BLUSH

Amine-cured epoxy can develop surface carbamates when amine functionality reacts with moisture and carbon dioxide.
Fast cure can reduce the period during which the surface remains highly reactive but does not eliminate blush risk.
Cool humid conditions can still produce a greasy, cloudy or waxy deposit. Blush can interfere with gloss and intercoat adhesion.
Any suspicious surface deposit should be removed before sanding or recoating.

RECOATABILITY

Fast cure can shorten both the minimum and maximum practical recoat intervals.
A second coat applied while the first retains chemical reactivity can develop strong intercoat bonding. After full cure, abrasion may be required.
Dust, salts, blush or other contamination should be removed before recoating. Warm conditions can close the chemical recoat window quickly.
The final product specification should define recoat intervals at realistic temperatures.

WEATHERING

Low initial Gardner color can support pale coatings, but conventional epoxy chemistry remains vulnerable to ultraviolet yellowing and chalking.
ARADUR 46-1S should therefore not be treated as a dedicated long-term exterior decorative topcoat technology.
Marine or industrial systems exposed to sunlight commonly use a weather-resistant finish over the epoxy layer.
UV durability depends strongly on the epoxy resin and topcoat selection. Weathering should be evaluated on the complete coating system rather than the hardener alone.

LEGACY STATUS AND CURRENT DOCUMENTATION

ARADUR 46-1S is supported by older ambient-curing selector literature.
Current public product-document catalogs do not list a current ARADUR 46-1S TDS or SDS and instead list ARADUR 46-2 S documentation.
This profile therefore preserves the exact legacy ARADUR 46-1S selector values rather than replacing them with current ARADUR 46-2 S values.
For purchasing, regulatory declarations, current availability or direct substitution, the exact documentation supplied with the commercial material should be checked.
Ataman Chemicals can use current supplier documentation, batch COA and SDS to confirm the exact grade before formulation transfer or production use.

QUALITY CONTROL

Important legacy ARADUR 46-1S quality parameters are viscosity, amine value, AHEW, Gardner color and functional gel behavior.
Published values are approximately 220-320 mPa·s viscosity at 25°C, 310-340 mg KOH/g amine value, 95 g/eq AHEW, approximately 25 minutes reference gel time and Gardner ≤3.
A standardized resin cure test can help confirm the expected fast-cure behavior.
Density, flash point and exact current composition should be taken from product-specific SDS/TDS documentation rather than inferred.
If material is supplied under the exact ARADUR 46-1S name, the batch COA should take precedence over generic family data.

WHY AHEW MATTERS

AHEW determines theoretical hardener demand relative to the epoxy equivalent weight of the resin.
ARADUR 46-1S has an approximate AHEW of 95 g/eq. This is the same published AHEW as ARADUR 46-1, even though the S grade cures faster.
The similarity shows that AHEW describes reactive equivalent concentration rather than reaction speed.
Gel time and pot life must therefore be considered separately.

WHY GEL TIME MATTERS

The approximately 25-minute reference gel time is the key processing distinction of ARADUR 46-1S.
It indicates significantly faster reaction than ARADUR 46-1. Faster gel can improve turnaround but gives less time for leveling, wetting and air release.
Temperature and batch size can shift the working window substantially.
Production procedures should therefore define a maximum use time after mixing.

BENZYL ALCOHOL STATUS

ARADUR 46-1S should not be described as benzyl-alcohol-free based on the available selector data.
In the published table, products carrying an explicit benzyl-alcohol-free designation are marked separately, and ARADUR 46-1S is not marked with that status.
The exact current or archived SDS should be consulted if benzyl alcohol content is important to a formulation or regulatory requirement.
No restricted-substance claim should be invented from the product name or generic chemistry.

TDS, SDS AND COA

The current or archived product-specific Technical Data Sheet should be used for any formal specification beyond the selector values confirmed in this profile.
The Safety Data Sheet governs component disclosure, hazard classification, first aid, fire response, transport and disposal.
The Certificate of Analysis provides batch-specific controlled values where supplied.
Legacy selector literature supports the 220-320 mPa·s viscosity, 310-340 mg KOH/g amine value, 95 g/eq AHEW, 25-minute gel time, Gardner ≤3 and civil-engineering / industrial-maintenance / marine-coating application positioning.
Current public documentation lists ARADUR 46-2 S rather than ARADUR 46-1S, so the two grades should not be conflated without formal documentation.

SAFETY AND HANDLING

ARADUR 46-1S is a reactive amine curing agent and should be handled according to the product-specific SDS.
Direct skin and eye contact should be avoided. Chemical-resistant gloves, suitable eye protection and protective clothing should be selected through workplace risk assessment.
Ventilation should control vapor, mist or aerosol from the complete formulation.
The exact flash point, transport classification and exposure controls should be taken from the product-specific SDS rather than inferred from related grades.
Rapid cure also creates an exotherm risk in large mixed masses.

FIRST AID

After skin contact, wash contaminated skin promptly according to SDS guidance and remove contaminated clothing.
If material enters the eyes, begin immediate prolonged rinsing with clean water and obtain medical attention according to the SDS.
If mist or aerosol is inhaled and symptoms occur, move the affected person to fresh air and obtain appropriate medical advice.
After accidental ingestion, follow the product-specific SDS and professional medical guidance.

SPILL MANAGEMENT

Spilled ARADUR 46-1S can create a slippery surface and should be contained promptly.
Personnel should use suitable PPE and prevent release to drains, soil or surface water.
Compatible absorbent can be used for smaller spills, while larger releases may require pumping or specialist response.
Recovered material and contaminated absorbent should be placed in appropriate labeled waste containers.
Spill cleanup should avoid accidental mixing with epoxy resin or incompatible chemicals.

FIRE RESPONSE

ARADUR 46-1S is an organic amine formulation and can burn or decompose under severe heating.
The exact flash point should be taken from the product-specific SDS because no sufficiently reliable public value for the exact legacy grade was verified.
Thermal decomposition can generate hazardous fumes.
Firefighters may require self-contained breathing apparatus and appropriate protective equipment.
Extinguishing media and emergency procedures should follow the SDS and facility fire plan.

STORAGE

ARADUR 46-1S should be kept in its original tightly closed container under dry controlled storage conditions.
Direct sunlight and excessive heat should be avoided. Moisture and carbon-dioxide exposure should be minimized because amines can react with atmospheric contaminants.
The exact approved storage-temperature range and shelf life should be taken from the current or archived product-specific documentation.
Material should be conditioned to a suitable processing temperature before viscosity-sensitive metering.

REGULATORY CONSIDERATIONS

ARADUR 46-1S is a legacy commercial cycloaliphatic polyamine curing agent documented in older selector literature.
Historical brochure-level statements described the product family as nonylphenol-free, phenol-free and tert-butyl-phenol-free and included additional BPA/BPF-related statements subject to stated exceptions.
Those family-level historical statements should not be converted automatically into current product-specific regulatory declarations.
Current regulatory status, chemical inventories and restricted-substance declarations should be confirmed from current or archived product-specific documentation.
Generic use in marine coatings, civil engineering or industrial maintenance does not establish approval for food contact, potable water or other specialized regulated uses.

ENVIRONMENTAL CONSIDERATIONS

Uncured amine hardener should not be released directly to soil, drains or surface water.
Cleaning waste can contain resin, hardener, pigments, fillers and solvents or detergents and should be managed appropriately.
Rapid-cure mixed material can generate heat in waste containers and should not be accumulated in large uncontrolled masses.
Fully cured epoxy has different mobility and reactivity from uncured components, but disposal requirements remain jurisdiction-specific.
Marine applications require special care to prevent release of uncured coating into surrounding water.

COMMON FORMULATION PROBLEMS

Pot life much shorter than expected
Warm components, large batch size, reactive pigments or catalytic contamination can shorten the already fast working time. Reduce batch size and standardize temperature.

Material gels before application is complete
ARADUR 46-1S is a fast grade. Use smaller batches, simplify the application sequence or select a slower hardener where more open time is required.

Poor self-leveling
Late-pot-life application, excessive filler or too much thixotrope can reduce flow. Apply promptly and optimize rheology.

Sagging
The binder can be relatively fluid. Increase compatible low-shear structure or reduce wet-film thickness.

Filler settlement
Dense filler can settle in a low-viscosity system. Improve particle-size distribution and low-shear rheology.

Foaming
High-speed mixing or porous-substrate outgassing can trap air. Use controlled mixing and suitable defoaming.

Pinholes
Fast cure can lock bubbles into the film before they escape. Improve air release and reduce excessive mixing shear.

Soft film
Incorrect stoichiometry, incompatible resin or insufficient cure can leave the film soft. Verify EEW, AHEW and cure conditions.

Brittle film
Off-ratio cure, rigid resin or excessive filler can reduce toughness. Rebalance the formulation.

Poor adhesion
Oil, salts, dust, rust or weak concrete can prevent bonding. Improve surface preparation before changing chemistry.

Poor corrosion resistance
Low film thickness, pinholes, poor steel preparation or unsuitable pigment design can reduce protection. Test the complete system.

Low chemical resistance
Testing too early, off-ratio cure or unsuitable resin can reduce resistance. Allow full cure and test the actual chemical exposure.

Early water whitening
Rapid gel does not mean full water resistance. Delay washing or immersion until adequate cure develops.

Amine blush
Cool humid conditions can create surface deposits. Clean the surface before recoating if blush is present.

Intercoat adhesion failure
Fast cure can close the chemical recoat window quickly. Observe the validated recoat schedule and abrade fully cured surfaces when required.

Unexpectedly high viscosity
Low temperature, aging or contamination can raise viscosity. Condition the sample to 25°C and compare with the expected 220-320 mPa·s range.

Unexpectedly low viscosity
Dilution or contamination can lower viscosity. Check amine value and functional cure behavior.

Confusion with ARADUR 46-2 S
Do not substitute 46-2 S data automatically for 46-1S. Verify the exact grade name, TDS, SDS and COA before formulation transfer.

FREQUENTLY ASKED QUESTIONS

What is ARADUR 46-1S?
ARADUR 46-1S is a legacy fast-curing cycloaliphatic polyamine epoxy hardener documented for civil engineering, industrial maintenance and marine coatings.

What is the viscosity?
Approximately 220-320 mPa·s at 25°C.

What is the amine value?
Approximately 310-340 mg KOH/g.

What is the active hydrogen equivalent weight?
Approximately 95 g/eq.

What is the reference gel time?
Approximately 25 minutes with ARALDITE GY 250 under the published selector comparison method.

What is the Gardner color?
Approximately ≤3.

What are the documented application sectors?
Civil engineering, industrial maintenance and marine coatings.

Is ARADUR 46-1S faster than ARADUR 46-1?
Yes. The published reference gel time is approximately 25 minutes versus approximately 38 minutes for ARADUR 46-1.

Does ARADUR 46-1S have the same AHEW as ARADUR 46-1?
Yes. Both are listed at approximately 95 g/eq.

Is ARADUR 46-1S the same chemistry as ARADUR 46-1?
No. Legacy selector literature describes ARADUR 46-1 as a polyamine adduct and ARADUR 46-1S as a cycloaliphatic polyamine.

Is ARADUR 46-1S the same as ARADUR 46-2 S?
No assumption of equivalence should be made. Current public documentation lists ARADUR 46-2 S, while ARADUR 46-1S appears in older selector literature with a different specification set.

What is the theoretical hardener level with a resin EEW of 190?
Approximately 50 parts ARADUR 46-1S per 100 parts resin based on AHEW 95 g/eq.

Is 50 phr universal?
No. The correct ratio depends on the exact resin EEW, reactive diluents and formulation design.

Can ARADUR 46-1S be used for marine coatings?
Yes. Marine coatings are part of its documented application positioning.

Can ARADUR 46-1S be used for industrial maintenance?
Yes. Industrial maintenance is one of the documented application sectors.

Can ARADUR 46-1S be used in civil engineering?
Yes. Civil engineering is one of the documented application sectors.

Can ARADUR 46-1S be used for flooring?
Yes. Its low viscosity and fast cure make it technically relevant to compatible flooring and repair systems, provided pot life is manageable.

Can ARADUR 46-1S be used for anti-corrosion primers?
Yes. Its marine and industrial-maintenance positioning makes compatible anti-corrosion systems a relevant application.

Is ARADUR 46-1S benzyl-alcohol-free?
The available selector table does not mark ARADUR 46-1S as benzyl-alcohol-free, so that claim should not be made without product-specific confirmation.

Is ARADUR 46-1S a pure substance?
No. It should be treated as a commercial formulated curing agent.

Does ARADUR 46-1S have one universal CAS number?
No. A single universal CAS number should not be assigned to the complete trade grade without the product-specific SDS.

What is the density?
Use the product-specific TDS or SDS; no sufficiently reliable public value for the exact legacy grade was verified.

What is the flash point?
Use the product-specific SDS; no sufficiently reliable public value for the exact legacy grade was verified.

Is ARADUR 46-1S still listed in current public product-document catalogs?
Current public document catalogs list ARADUR 46-2 S rather than ARADUR 46-1S, so exact current availability should be confirmed before procurement or substitution.

What documents should be checked before use?
Use the exact grade TDS, SDS and batch-specific COA or quality documentation where available.

FINAL TECHNICAL SUMMARY

ARADUR 46-1S is a legacy cycloaliphatic polyamine epoxy curing agent documented for civil-engineering, industrial-maintenance and marine-coating applications.
Published selector data specify approximately 220-320 mPa·s viscosity at 25°C, 310-340 mg KOH/g amine value, approximately 95 g/eq active-hydrogen equivalent weight, approximately 25 minutes reference gel time and Gardner color ≤3.

The key processing advantage is faster cure than ARADUR 46-1.
ARADUR 46-1 gives approximately 38 minutes reference gel time, while ARADUR 46-1S gives approximately 25 minutes under the published selector comparison.
Both grades have approximately 95 g/eq AHEW, so their theoretical hardener demand can be similar with the same epoxy resin even though their cure speed differs.
ARADUR 46-1S is described as a cycloaliphatic polyamine, whereas ARADUR 46-1 is described as a polyamine adduct.
Low viscosity supports mixing, substrate wetting, filler incorporation and self-leveling formulations.
The faster cure can improve turnaround in primers, maintenance coatings, floor repairs, mortars, grouts and adhesives, but it shortens pot life and increases sensitivity to batch size and temperature.

Marine-coating positioning makes anti-corrosion primers, shipbuilding maintenance and coastal protective systems relevant applications when the complete formulation is validated.
Civil-engineering positioning supports concrete primers, repair mortars, anchoring, bonding and flooring applications.
Industrial-maintenance positioning supports protective coatings for machinery, steel structures and plant equipment.
For a resin EEW near 190 g/eq, the theoretical hardener level is approximately 50 parts ARADUR 46-1S per 100 parts resin.

That ratio is not universal and should be recalculated for the exact epoxy resin.
Current public product-document catalogs list ARADUR 46-2 S rather than ARADUR 46-1S. The values in this profile therefore preserve the exact legacy ARADUR 46-1S selector data and do not substitute current 46-2 S specifications.
ARADUR 46-1S should not be described as benzyl-alcohol-free on the basis of the available selector table because the grade is not marked with that designation.
Density, flash point, storage range and formal composition should be taken from exact product-specific TDS/SDS documentation rather than inferred from related grades.
ARADUR 46-1S is a commercial formulated hardener and should not be assigned an invented single molecular formula, molecular weight, CAS number or EC number.

For ARADUR 46-1S technical specifications, archived or current documentation, application guidance, SDS, COA and formulation support, contact Ataman Chemicals with the exact grade label, epoxy resin, substrate, application temperature and required cure speed.

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