ARADUR 847

ARADUR 847 is a low-viscosity, light-colored modified cycloaliphatic polyamine adduct epoxy curing agent developed for high-solids and solventless coatings, floorings, self-leveling floors, epoxy aggregate systems, tank coatings, tank linings and protective systems used in demanding industrial and infrastructure environments. Current product-specific data give approximately 150-300 mPa·s viscosity at 25°C, an amine value of approximately 350-375 mg KOH/g, an active-hydrogen equivalent weight of approximately 75 g/eq, density around 1.01 g/cm³ at 25°C, flash point around 105°C closed cup and Gardner color ≤2. Current product information gives a reference mix ratio of approximately 40 parts ARADUR 847 per 100 parts reference epoxy resin and a product-specific gel time of approximately 40 minutes, while older ambient-curing selector literature reported approximately 30 minutes under an earlier comparison method. ARADUR 847 combines fast cure, low viscosity, high gloss, light color, chemical resistance, water resistance and strong blush/exudation resistance in a versatile cycloaliphatic epoxy hardener.

PRODUCT IDENTITY

Product name: ARADUR 847
Product type: Epoxy curing agent / hardener
Chemical family: Cycloaliphatic amine
Specific chemistry: Modified cycloaliphatic polyamine adduct
Physical form: Liquid
Appearance: Clear liquid with no visible contamination in current product-specific technical data
SDS color description: Light yellow, clear
Odor: Amine-like
Viscosity at 25°C: Approximately 150-300 mPa·s
Amine value: Approximately 350-375 mg KOH/g
Active hydrogen equivalent weight: Approximately 75 g/eq
Density at 25°C: Approximately 1.01 g/cm³
Relative density at 25°C: Approximately 1.01
Flash point: Approximately 105°C, closed cup / Pensky-Martens closed cup
Boiling point: Minimum approximately 200°C in published safety-property data
Vapor pressure at 20°C: Approximately 0.067 hPa
pH: Approximately 11.2 at the stated 500 g/L concentration and 20°C test condition
Water solubility: Partially soluble in water at approximately 20°C
Color: Gardner maximum approximately 2
Current product-specific gel time: Approximately 40 minutes
Historical ambient-curing selector gel time: Approximately 30 minutes with ARALDITE GY 250 under an older selector comparison
Current reference mix ratio: Approximately 40 g ARADUR 847 per 100 g reference epoxy resin
Theoretical mix ratio with resin EEW 190 g/eq: Approximately 39.5 parts ARADUR 847 per 100 parts resin based on AHEW 75 g/eq
Primary functions: Curing agent and hardener
Primary current end uses: Epoxy aggregate, floorings, self-leveling floors, solventless and high-solids coatings, tank coatings and tank linings
Additional current application process: Sewage-treatment protective systems
Primary material compatibility: Concrete surfaces and metal substrates
Primary current product features: Chemical resistance, exudation resistance, fast cure, good blush resistance, high gloss, light color, low blush, low viscosity and water resistance
Additional documented performance: Acid resistance, alkali resistance, solvent resistance and excellent surface appearance in current technical distribution data
Current labeling claim: Food Contact Acceptable, subject to current product-specific documentation and finished-system regulatory validation
Historical application sectors: Civil engineering, industrial maintenance and marine coatings
Benzyl alcohol status: Ambient-curing selector literature marks ARADUR 847 as benzyl-alcohol-free
Storage: Room temperature in the original sealed container according to current product information
Handling condition: Keep container tightly closed when not in use and during transportation; use with adequate ventilation
Packaging reference: Current product information lists supply in steel drums; package size can vary by region and current supply program
CAS Number: Proprietary modified cycloaliphatic polyamine-adduct formulation; no single universal CAS number should be assigned to the complete trade grade without the current product-specific SDS
EC Number: Proprietary commercial formulation; no single universal EC number should be assigned without current product-specific documentation
Molecular Formula: Not applicable to the complete commercial formulation
Molecular Weight: Variable / not applicable as one fixed value

Synonyms: ARADUR 847, Modified Cycloaliphatic Polyamine Adduct, Cycloaliphatic Polyamine Adduct, Cycloaliphatic Amine Hardener, Epoxy Curing Agent, Epoxy Hardener, Low-Viscosity Epoxy Hardener, Light-Colored Epoxy Hardener, High-Solids Epoxy Hardener, Solventless Epoxy Hardener, Self-Leveling Floor Hardener, Flooring Epoxy Hardener, Tank-Lining Epoxy Hardener, Chemical-Resistant Epoxy Hardener, Water-Resistant Epoxy Hardener, Blush-Resistant Epoxy Hardener, High-Gloss Epoxy Hardener, Industrial Maintenance Epoxy Hardener

ARADUR 847 should be treated as a proprietary modified cycloaliphatic polyamine-adduct curing agent rather than as one pure molecular substance. Although cycloaliphatic amines such as isophorone diamine can be used as building blocks in this chemistry family, assigning the CAS number, formula or molecular weight of a raw-material amine directly to the commercial ARADUR 847 grade would be inaccurate. Current product-specific TDS, SDS and COA documentation should control formal identity and batch acceptance.

WHAT IS ARADUR 847?

ARADUR 847 is a low-viscosity cycloaliphatic polyamine adduct designed for liquid epoxy resin systems.
The grade is particularly valuable where a formulator needs high solids or solventless processing without giving up fast ambient cure, strong chemical resistance or smooth film appearance.
Current product positioning emphasizes self-leveling flooring, epoxy aggregate, tank coating, tank lining and sewage-treatment protective systems.
The low viscosity of approximately 150-300 mPa·s helps resin-hardener mixtures wet concrete, metal, fillers and aggregate effectively.
The low Gardner color and high-gloss positioning are useful in both industrial and decorative applications where surface appearance matters.
ARADUR 847 is also distinguished by good blush resistance and exudation resistance, helping maintain a cleaner cured surface under demanding ambient conditions.

MODIFIED CYCLOALIPHATIC POLYAMINE ADDUCT CHEMISTRY

ARADUR 847 is described as a modified cycloaliphatic polyamine adduct.
A cycloaliphatic amine contains reactive amine functionality associated with saturated cyclic carbon structures.
Adduction modifies the parent amine chemistry through controlled pre-reaction, changing molecular size, free-amine concentration, viscosity, compatibility and surface-cure behavior.
The resulting commercial hardener retains active amine hydrogens that react with epoxy groups while offering a more balanced application profile than an unmodified small-molecule amine.
This chemistry helps combine rapid cure, low viscosity, chemical resistance and reduced tendency toward surface exudation or blush.
The product remains a proprietary formulated mixture, so the exact molecular composition should not be reconstructed from generic cycloaliphatic amine building blocks.

HOW EPOXY CURING WORKS

Epoxy resins contain strained oxirane rings that can be opened by active amine hydrogens.
ARADUR 847 provides reactive amine functionality that attacks these epoxy rings and forms carbon-nitrogen bonds together with hydroxyl groups.
Repeated reaction between multifunctional epoxy resin and hardener creates a three-dimensional thermoset network.
The material initially remains fluid enough to wet the substrate and level, then viscosity rises as molecular weight and crosslink density increase.
Gelation occurs when the growing network prevents macroscopic flow, but cure continues after gelation and final properties develop progressively.
Chemical resistance, water resistance, hardness and adhesion should therefore be evaluated after the system reaches the specified cure stage rather than immediately after tack-free time.

LOW VISCOSITY

Low viscosity is one of the defining advantages of ARADUR 847.
Current product data give approximately 150-300 mPa·s at 25°C.
This range is low enough to support solventless and high-solids formulations without requiring large quantities of external solvent.
In self-leveling flooring, low viscosity helps the binder spread and wet mineral filler before gelation.
In primers or tank linings, low viscosity improves contact with prepared metal or concrete surface profile.
The final formulation still requires deliberate rheology control because low binder viscosity can permit sag on vertical surfaces or filler settlement in heavily loaded systems.

AMINE VALUE

ARADUR 847 has a current amine value of approximately 350-375 mg KOH/g.
Amine value is a titration-based measure of basic nitrogen functionality expressed as an equivalent amount of potassium hydroxide.
The range is useful for incoming quality control and confirmation that the correct hardener has been supplied.
A significant deviation can indicate contamination, dilution, aging or product mismatch.
Amine value should not be substituted directly for AHEW in stoichiometric calculation because the two parameters describe different aspects of the amine chemistry.
The approximately 75 g/eq AHEW is the appropriate public parameter for theoretical epoxy-equivalent calculations.

ACTIVE HYDROGEN EQUIVALENT WEIGHT

ARADUR 847 has an active-hydrogen equivalent weight of approximately 75 g/eq.
AHEW represents the mass of commercial hardener required to provide one equivalent of reactive amine hydrogen.
For an epoxy resin with EEW 190 g/eq, simple theoretical stoichiometry gives approximately 39.5 parts ARADUR 847 per 100 parts resin.
This closely matches the current product-specific reference mix ratio of approximately 40 g hardener per 100 g reference epoxy resin.
At resin EEW 185 g/eq, the theoretical level is approximately 40.5 phr, while at EEW 200 g/eq it is approximately 37.5 phr.
The close agreement between the 40 phr reference and theoretical calculation provides a useful consistency check, but the actual ratio should still follow the exact resin and current technical guidance.

CURRENT REFERENCE MIX RATIO

Current product-specific technical information gives an application mix ratio of approximately 40 g ARADUR 847 per 100 g reference epoxy resin.
This ratio is consistent with the published AHEW of approximately 75 g/eq and a typical liquid epoxy resin in the usual EEW range around 185-190 g/eq.
The mix ratio should be controlled by weight for highest accuracy.
Reactive diluents or blended epoxy resins can change the effective EEW and therefore the required hardener amount.
A reference ratio should not be transferred automatically to every epoxy resin.
Production formulations should verify hardness, cure, adhesion, water resistance and chemical resistance at the chosen ratio.

CURRENT GEL TIME

Current product-specific technical information gives a gel time of approximately 40 minutes.
This value is the primary gel-time reference for this authority page because it comes from current product-specific data.
The approximately 40-minute result indicates a fast but workable ambient-cure profile suitable for flooring, coatings and linings.
Practical pot life can be shorter than formal gel time because the formulation may lose optimum leveling, air release or substrate wetting before complete gelation.
Temperature and mixed mass have a strong influence because epoxy-amine cure is exothermic.
The final formulation should therefore establish its own application working time under realistic field or production conditions.

HISTORICAL GEL-TIME DIFFERENCE

Older ambient-curing selector literature lists approximately 30 minutes gel time for ARADUR 847 with ARALDITE GY 250.
Current product-specific data instead give approximately 40 minutes.
The difference can arise from changes in test method, reference mass, product documentation generation, formulation basis or specification update.
The current product-specific 40-minute value should be treated as the primary present reference, while the older 30-minute value remains useful historical selector context.
A formulator should not attempt to reconcile the two values by averaging them.
Current TDS and batch-specific functional testing should control production decisions.

DENSITY

Current technical data give ARADUR 847 a density of approximately 1.01 g/cm³ at 25°C.
The relative density is likewise reported around 1.01.
Density is useful for process calculations, inventory control and conversion between mass and volume.
Stoichiometric epoxy formulation is preferably controlled by mass because density changes with temperature.
Volumetric dispensing systems should be calibrated using actual material temperature and current density data.
Density also provides a useful secondary identity check when interpreted together with viscosity and amine value.

FLASH POINT

Current product-specific data give a flash point of approximately 105°C by closed-cup testing.
Safety-property data identify the method as Pensky-Martens closed cup.
This relatively high flash point is favorable for high-solids and solventless formulation compared with low-flash solvent-cut hardeners.
The product is still an organic reactive material and can burn or decompose under severe heating.
High flash point should not be interpreted as non-combustible status.
Storage, heating and fire response should follow the current product-specific SDS.

PH AND WATER SOLUBILITY

Published safety-property data give a pH around 11.2 under a specified 500 g/L, 20°C test condition.
This alkaline behavior is consistent with reactive amine chemistry.
ARADUR 847 is described as partially soluble in water at approximately 20°C rather than fully water soluble.
Partial water solubility does not make the hardener a waterborne curing agent.
Direct water addition can change compatibility, viscosity and cure behavior and should not be used as an unvalidated dilution method.
The alkaline character also reinforces the need for appropriate skin and eye protection.

LIGHT COLOR

Light color is a current product feature and the current Gardner color limit is approximately 2.
This makes ARADUR 847 suitable for light-pigmented industrial floors and coatings where strongly colored hardeners would interfere with appearance.
Current SDS information describes the liquid as light yellow and clear.
The final coating color depends on resin, pigments, fillers and cure conditions.
Conventional epoxy resin can still yellow under ultraviolet exposure even when the hardener has low initial color.
Exterior decorative use should therefore consider a weather-resistant finish if long-term color retention is critical.

HIGH GLOSS

High gloss is a current product feature.
A high-gloss epoxy film requires good compatibility, flow, air release and surface cure.
The low viscosity of ARADUR 847 helps the mixed binder level before cure advances.
Blush resistance and low exudation reduce the risk of dull or contaminated surface appearance.
Pigment dispersion, filler loading and application technique still influence gloss strongly.
Gloss should therefore be evaluated on the complete formulation rather than attributed to the hardener alone.

GOOD BLUSH RESISTANCE

Good blush resistance and low-blush positioning are central ARADUR 847 features.
Amine blush can form when reactive amines interact with atmospheric moisture and carbon dioxide during cure.
The resulting surface can appear cloudy, greasy or waxy and can interfere with gloss and intercoat adhesion.
ARADUR 847 is formulated to reduce this tendency compared with less controlled amine systems.
Cold, humid or condensing conditions can still challenge any ambient-cure epoxy.
Surface cleanliness should be checked before recoating, especially in high-humidity construction or tank work.

EXUDATION RESISTANCE

Exudation resistance is another current product feature.
Exudation describes migration or separation of low-molecular-weight components toward the coating surface during cure.
Surface exudation can reduce gloss, create oily films and interfere with adhesion of subsequent coats.
The modified adduct structure of ARADUR 847 helps maintain a cleaner and more uniform surface in properly balanced formulations.
This is particularly useful in self-leveling floors and high-gloss coatings where surface quality is immediately visible.
Formulation compatibility and correct stoichiometry remain important because an excessively off-ratio system can still produce surface defects.

FAST CURE

Fast cure is a primary current product feature.
The current approximately 40-minute gel-time reference provides a practical balance between application time and rapid network development.
Fast cure supports shorter turnaround in flooring, industrial maintenance and tank-lining work.
The coating should still be allowed to reach the specified final cure before severe chemical or water exposure.
Warm conditions and large batches shorten practical pot life.
Small batch size and efficient application planning are therefore important in hot environments.

CHEMICAL RESISTANCE

Chemical resistance is a primary current ARADUR 847 feature.
A properly cured epoxy network can resist many oils, cleaners, salts and industrial chemicals depending on resin choice and exposure conditions.
Additional technical distribution data identify acid, alkali and solvent resistance as important grade characteristics.
Chemical resistance depends on crosslink density, cure completeness, film thickness and exact service temperature.
Aggressive solvents, strong acids, oxidizers and elevated-temperature immersion require dedicated testing.
A coating should be qualified using the actual chemical concentration and exposure duration expected in service.

ACID RESISTANCE

ARADUR 847 is positioned for acid resistance in current technical distribution data.
Acid-resistant epoxy coatings are useful in wastewater treatment, industrial processing and tank-lining applications.
The degree of resistance depends strongly on acid identity, concentration and temperature.
Dilute inorganic acid splash can be much less severe than continuous hot concentrated acid immersion.
The epoxy resin backbone also affects resistance, so a general hardener claim cannot define the entire chemical-resistance envelope.
Finished-system immersion testing should control critical acid-service decisions.

ALKALI RESISTANCE

Alkali resistance is also identified in current technical distribution information.
This is useful in concrete, sewage-treatment and cleaning environments where alkaline solutions can contact the coating.
The crosslinked epoxy network normally provides good alkaline stability when fully cured.
Under-cure or excessive residual amine can change water uptake and surface behavior.
Hot concentrated alkali exposure should be tested separately from mild cleaning conditions.
Film continuity and substrate adhesion remain essential to successful chemical protection.

SOLVENT RESISTANCE

Solvent resistance is included in current technical performance descriptions.
Organic solvents can swell or soften an insufficiently crosslinked epoxy film.
Correct stoichiometry and complete cure are therefore important before solvent exposure.
Resin functionality and reactive diluent choice can strongly influence solvent resistance.
Intermittent splash exposure should be distinguished from continuous immersion.
The final formulation should be tested with the actual solvent or solvent blend expected in service.

WATER RESISTANCE

Water resistance is a primary current product feature and is particularly relevant to tank linings and sewage-treatment systems.
A cured epoxy network can provide a dense barrier against liquid water when the formulation is correctly balanced and fully cured.
Early water exposure before adequate cure can produce whitening, softening or adhesion loss.
Water resistance does not automatically establish suitability for potable-water contact or continuous immersion under every condition.
Immersion temperature, water chemistry and substrate preparation all matter.
Continuous-service qualification should rely on current system-specific testing.

FOOD-CONTACT POSITIONING

Current product labeling identifies ARADUR 847 as Food Contact Acceptable.
This designation applies to the commercial hardener under current product-specific regulatory documentation and does not automatically authorize every finished coating for food contact.
A complete formulation contains epoxy resin, pigments, fillers and additives that must all meet the applicable requirements.
Cure conditions and migration limits can also determine compliance.
Historical customer-formulated systems based on ARADUR 847 have undergone third-party approval evaluation, but current formal claims should rely on current documentation rather than historical status alone.
Ataman Chemicals can provide or coordinate the current documentation available for a specific regulatory assessment.

APPLICATIONS

Self-leveling floors
Self-leveling flooring is one of the most important ARADUR 847 applications. Low viscosity, high gloss, light color and fast cure support smooth industrial floor surfaces.

Industrial flooring
Factories, workshops and warehouses can use compatible ARADUR 847 flooring systems where chemical resistance, water resistance and rapid cure are required.

High-solids floor coatings
The low hardener viscosity allows high-solids flooring formulations with reduced external solvent demand.

Solventless floor coatings
ARADUR 847 is specifically positioned for solventless systems and can be used with compatible liquid epoxy resins in high-build floor technology.

Epoxy aggregate flooring
Epoxy aggregate is a current end-use category. ARADUR 847 can wet silica, quartz and mineral aggregate efficiently in filled floor or repair systems.

Quartz-filled floors
Quartz-filled systems can combine abrasion resistance and mechanical build with the low-viscosity binder.

Broadcast floors
Aggregate can be broadcast into compatible primer or body layers before cure closes the surface.

Workshop floors
Workshop floors can use ARADUR 847 where oils, cleaning, impact and abrasion are expected.

Warehouse floors
High-solids flooring can provide smooth, durable surfaces for wheeled traffic and routine cleaning.

Plant-room floors
Mechanical and utility areas can use water- and chemical-resistant epoxy flooring.

Commercial industrial floors
Light color and high-gloss capability can support floors where both appearance and chemical durability matter.

Floor top coats
High-gloss finishing layers can use ARADUR 847 where cure speed and blush resistance are important.

Tank coatings
Tank coating is a primary current end use. ARADUR 847 can be formulated into protective epoxy films for compatible metal or concrete tank surfaces.

Tank linings
Tank lining is a primary current application. Chemical and water resistance make the grade relevant where full immersion conditions are validated.

Concrete tank linings
Concrete tanks can use compatible high-build epoxy linings after suitable substrate preparation and moisture assessment.

Metal tank linings
Prepared steel tanks can use ARADUR 847 systems where chemical resistance and adhesion are validated for the stored medium.

Sewage-treatment coatings
Sewage-treatment use is a current application process. Protective epoxy systems can shield concrete or metal from water, cleaning chemicals and process 
exposure.

Wastewater-treatment linings
Concrete basins, channels and equipment can use compatible epoxy linings after service-specific chemical and immersion testing.

Water-treatment infrastructure coatings
ARADUR 847 can be evaluated in protective systems used around water-treatment equipment, subject to current regulatory and service requirements.

High-solids coatings
High-solids coating is a primary product positioning. The low-viscosity hardener helps reduce dependence on conventional solvent.

Solventless coatings
Solventless and very-high-solids protective systems can use ARADUR 847 with suitable liquid epoxy resins.

Industrial maintenance coatings
Historical selector positioning includes industrial maintenance. Fast cure and chemical resistance support maintenance work where downtime matters.

Marine coatings
Historical selector positioning includes marine coatings. Prepared steel systems can use the grade where water and corrosion resistance are validated.

Marine maintenance coatings
Shipyard and marine repair systems can use ARADUR 847 after salt removal and proper surface preparation.

Anti-corrosion primers
Prepared steel can use compatible ARADUR 847 primer systems with suitable corrosion-inhibitive pigments.

Steel primers
Low viscosity supports wetting of abrasive-blasted steel profile.

Direct-to-metal coatings
DTM formulations can combine adhesion, chemical resistance and protective barrier performance when properly validated.

Structural-steel coatings
Industrial frames, beams and fabricated steel can use high-solids epoxy coatings where long-term UV appearance is not the primary requirement.

Machinery coatings
Machine frames and industrial equipment can use chemically resistant epoxy coatings with good surface appearance.

Equipment coatings
Process equipment can use ARADUR 847 systems where solvent, water and chemical exposure are expected.

Pipe coatings
Prepared pipe surfaces can use compatible protective epoxy systems for atmospheric or selected industrial service.

Valve coatings
Industrial valves can use chemically resistant epoxy coatings after service-specific testing.

Pump coatings
Selected pump housings and components can use ARADUR 847 protective systems where immersion and chemical exposure are qualified.

Concrete coatings
Concrete surfaces can use high-solids protective coatings where substrate strength and moisture conditions are appropriate.

Concrete primers
Low-viscosity resin-hardener blends can penetrate prepared concrete and create an adhesion-promoting base for later layers.

Primer-sealers
Porous mineral substrates can use primer-sealers designed to consolidate the surface and reduce absorption.

Epoxy mortars
Mineral-filled mortars can use ARADUR 847 where low binder viscosity helps wet aggregate efficiently.

Repair mortars
Fast-cure repair systems can be developed for concrete or industrial floors when working time and exotherm are controlled.

Epoxy screeds
Highly filled screed systems can use the grade where the binder remains workable long enough for placement and finishing.

Floor toppings
Protective toppings can combine the hardener with graded aggregate for abrasion and mechanical strength.

Epoxy grouts
Filled grout formulations can use ARADUR 847 where flow and aggregate loading are balanced.

Machinery-base grouts
Equipment-base grout systems can be evaluated where compressive strength, adhesion and chemical resistance are required.

Anchoring compounds
Cycloaliphatic amine cure can be used in compatible epoxy anchoring systems after bond-strength and installation-time validation.

Construction adhesives
ARADUR 847 can be evaluated in ambient-cure epoxy adhesives where low viscosity and chemical resistance are useful.

Metal bonding
Prepared steel and aluminum can be bonded using compatible two-component formulations.

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

Chemical-resistant primers
Resin selection can be optimized with ARADUR 847 for industrial chemical-service primers.

Acid-resistant coatings
Acid-resistant protective systems can use ARADUR 847 after the exact acid exposure is tested.

Alkali-resistant coatings
Alkaline cleaning and process environments can use compatible epoxy systems where resistance is validated.

Solvent-resistant coatings
Industrial areas exposed to solvents can use fully cured ARADUR 847 systems with suitable resin chemistry.

High-gloss protective coatings
Current high-gloss positioning supports smooth industrial finishes where appearance and durability are both important.

Light-colored coatings
Gardner ≤2 makes the hardener attractive to pale pigmented epoxy formulations.

Blush-resistant coatings
Good blush resistance is useful in coatings cured under variable ambient humidity.

Low-exudation coatings
Exudation resistance helps preserve gloss and clean intercoat surfaces.

Factory-applied coatings
Controlled production environments can exploit consistent mixing, cure and film build.

Production-line coatings
Fast cure can reduce handling intervals when the coating process is standardized.

Food-contact-intended coating systems
Current Food Contact Acceptable product labeling supports evaluation in appropriate formulations, but finished-system compliance must be verified independently.

General high-performance epoxy systems
Other uses are possible where low viscosity, fast cure, water resistance, chemical resistance and high surface quality match the service requirements.

SELF-LEVELING FLOOR FORMULATION

ARADUR 847 is particularly associated with self-leveling flooring.
A self-leveling floor must spread sufficiently to remove trowel or roller marks before the epoxy network advances too far.
The hardener's low viscosity helps maintain initial flow while its approximately 40-minute current gel time provides a practical but finite working period.
Silica, quartz and other mineral fillers can build body and abrasion resistance.
Rheology must prevent filler settlement without eliminating leveling.
Air release, batch size and concrete temperature should be controlled so the floor remains smooth and pinhole free.

HIGH-SOLIDS AND SOLVENTLESS FORMULATION

ARADUR 847 is specifically positioned for solventless and high-solids coatings.
Low hardener viscosity helps reduce the need for non-reactive solvent while retaining workable application viscosity.
Higher solids can increase dry-film build and reduce solvent emissions.
Solventless systems also make exotherm, air release and substrate wetting more visible formulation challenges because there is no evaporating solvent phase to temporarily reduce viscosity.
Reactive diluents can be used where compatible but change the effective resin EEW and must be included in stoichiometric calculations.
The complete formulation should be evaluated for actual VOC under the relevant regulatory definition.

TANK-LINING FORMULATION

Tank lining is a primary current ARADUR 847 end use.
A lining formulation should provide continuous film formation, strong adhesion, low permeability and resistance to the stored medium.
Film thickness should be sufficient to avoid pinholes or weak spots.
Concrete tanks require sound dry or otherwise qualified substrate conditions and may need moisture-control measures.
Steel tanks require removal of oil, soluble salts, rust and scale before coating.
The specific stored chemical, temperature and immersion duration should determine the final qualification program.

SEWAGE-TREATMENT SYSTEMS

Sewage-treatment service exposes coatings to continuous moisture, cleaning chemicals, biological residues and variable pH.
ARADUR 847 is explicitly associated with sewage-treatment protective systems in current end-use data.
Concrete and metal can both require barrier protection in this environment.
Chemical-resistance testing should consider actual treatment chemicals and concentration ranges.
Water immersion and adhesion after immersion are important qualification parameters.
A coating should also be checked for pinholes and holidays because local defects can undermine otherwise strong resin chemistry.

CONCRETE SURFACES

Concrete is a current material-compatibility category for ARADUR 847.
Concrete should be mechanically sound and free from weak laitance, dust, oil, curing compounds and loose material.
Grinding or shot blasting can expose sound substrate and provide a suitable profile.
Low-viscosity primer formulations can penetrate pores and improve interfacial contact.
Excessive substrate moisture or hydrostatic pressure should be evaluated because generic concrete compatibility does not automatically establish wet-concrete tolerance.
Pull-off testing can help verify adhesion in demanding flooring or lining systems.

METAL SUBSTRATES

Metal substrate compatibility is part of the current ARADUR 847 product positioning.
Steel should be free from oil, soluble salts, rust and loose mill scale.
Abrasive blasting is commonly preferred for severe corrosion or immersion service.
Low binder viscosity helps wet the blast profile.
Anti-corrosive pigment packages can supplement the barrier properties of the cured epoxy.
The final coating should be tested under the intended corrosion category and service environment.

PIGMENTS AND FILLERS

ARADUR 847 can be used with compatible pigments and mineral fillers.
Titanium dioxide, iron oxides, zinc phosphate, barytes, talc, silica, mica, calcium carbonate and micaceous iron oxide are examples that can be evaluated.
Pigment surfaces can adsorb amine, resin or dispersant and can alter cure behavior.
High filler loading can increase body, reduce shrinkage and improve abrasion resistance but can also reduce flow.
Self-leveling systems require especially careful particle-size distribution and low-shear rheology.
The final formulation should be checked for pot life, color development, leveling, adhesion and cured performance.

ANTI-CORROSIVE PIGMENTS

Zinc phosphate and related inhibitive pigments can supplement ARADUR 847 epoxy barrier performance.
Mica and micaceous iron oxide can increase the diffusion path for water and oxygen.
Pigment volume should remain low enough for the binder to form a continuous film.
Excessive pigment concentration can increase porosity and reduce chemical resistance.
Soluble-salt contamination should be minimized.
Salt-spray, cyclic-corrosion and immersion testing should be performed on the complete coating.

RHEOLOGY CONTROL

ARADUR 847 is very low in viscosity compared with many formulated amine hardeners.
Self-leveling floors benefit from this flow, while vertical tank coatings or mastics can require stronger anti-sag structure.
Fumed silica, organoclays, polymeric thixotropes and fine mineral filler can be evaluated where compatible.
Excessive structure can reduce wetting, leveling and air release.
Rheology should be checked throughout practical pot life because cure progressively increases viscosity.
The optimum rheology is application specific and should not be defined solely by the neat-hardener viscosity.

DEFOAMING AND AIR RELEASE

Air release is important in high-solids and solventless epoxy systems.
Mixing, filler dispersion and porous-substrate outgassing can introduce bubbles.
Suitable defoamers can improve surface quality, but excessive dosage can create craters or reduce intercoat adhesion.
Low viscosity supports bubble movement early in pot life.
Fast cure eventually immobilizes the film, so deaeration should occur promptly after mixing and application.
Concrete outgassing can be reduced through proper priming and application under stable or falling substrate temperature.

ADHESION

ARADUR 847 can provide strong adhesion when the selected resin and surface preparation are appropriate.
Low viscosity improves intimate contact with concrete porosity and steel blast profile.
Adhesion can still fail if the substrate is contaminated or mechanically weak.
Concrete pull-off strength can be limited by the cohesive strength of the concrete itself.
Metal adhesion should be evaluated after water, salt or chemical exposure where relevant.
Strong adhesion is necessary but not sufficient for a successful tank or industrial floor system; film continuity and chemical resistance are equally important.

POT LIFE

Practical pot life should be established independently from the current approximately 40-minute gel-time reference.
A self-leveling floor can lose ideal flow before formal gelation.
A primer can lose optimum penetration as viscosity rises.
Warm materials and large batches shorten pot life through exothermic self-heating.
Small batch sizes can improve working-time control in hot environments.
Material that has exceeded the validated application window should not be restored with solvent or fresh hardener.

EXOTHERM CONTROL

Epoxy-amine curing releases heat.
Large mixed masses retain reaction heat and can cure much faster than thin films.
Self-leveling floors and mortars may contain mineral filler that absorbs heat and moderates exotherm.
Unfilled coating or adhesive batches can reach higher peak temperature.
Only the quantity that can be applied promptly should be mixed.
Deep casting or grout applications should be qualified separately for peak temperature.

TEMPERATURE EFFECTS

Warm conditions reduce viscosity but accelerate reaction.
Cold conditions increase viscosity and extend early cure time.
The current approximately 40-minute gel-time result should not be assumed at every field temperature.
Concrete slabs and metal substrates can differ substantially from ambient air temperature.
Direct sunlight can heat components or substrates enough to shorten the application window unexpectedly.
Qualification should include the intended minimum and maximum application temperatures.

AMINE BLUSH

ARADUR 847 has good blush resistance and low-blush positioning.
Blush can nevertheless occur in amine-cured epoxy when reactive amines interact with atmospheric moisture and carbon dioxide.
Cool humid conditions and condensation increase the challenge.
Any surface deposit should be removed before recoating or bonding.
The hardener's blush resistance is especially useful in high-gloss flooring because surface contamination would otherwise be very visible.

RECOATABILITY

Fast cure can shorten the available chemical recoat window.
Applying a subsequent layer while the first coat retains reactive functionality can provide strong intercoat bonding.
After full cure, cleaning or mechanical abrasion can be required.
Blush, dust, salts and industrial contamination should be removed before recoating.
The exact minimum and maximum recoat intervals should be defined by the complete coating system and temperature.

ABRASION AND FLOORING PERFORMANCE

Industrial flooring requires abrasion resistance, impact tolerance, adhesion and chemical durability.
ARADUR 847 provides the curing function and favorable application characteristics, while mineral aggregate and resin choice strongly influence wear resistance.
Quartz and other hard fillers can increase abrasion performance.
Excessive filler can reduce self-leveling and increase surface roughness.
Heavy traffic should begin only after adequate cure has developed.
Finished floors can be qualified by abrasion, pull-off, compressive, impact and chemical-resistance testing.

WEATHERING

ARADUR 847 has light color and good surface appearance but conventional epoxy resin remains susceptible to ultraviolet yellowing and chalking.
Exterior protective systems often use epoxy as the primer or intermediate layer beneath a weather-resistant finish.
This is especially relevant to outdoor tanks, marine structures and exposed steel.
Indoor flooring, tank interior and wastewater applications are less affected by UV appearance concerns.
Weathering should be evaluated on the complete coating stack rather than the hardener alone.

QUALITY CONTROL

Important ARADUR 847 quality-control parameters include appearance, viscosity, amine value, AHEW, density, color and functional gel behavior.
Current viscosity is approximately 150-300 mPa·s at 25°C.
Amine value is approximately 350-375 mg KOH/g and AHEW approximately 75 g/eq.
Density is approximately 1.01 g/cm³ at 25°C, flash point approximately 105°C closed cup and Gardner color maximum approximately 2.
Current product-specific reference gel time is approximately 40 minutes and current reference mix ratio approximately 40 g/100 g resin.
A batch-specific COA should take precedence for incoming acceptance where supplied.

WHY VISCOSITY MATTERS

The 150-300 mPa·s viscosity range is central to the high-solids and self-leveling value of ARADUR 847.
Low viscosity improves mixing, pumping, wetting and filler incorporation.
Unexpectedly high viscosity can indicate low temperature, contamination or aging.
Unexpectedly low viscosity can indicate dilution, excess temperature or incorrect material.
Viscosity should be compared at the specified 25°C condition.

WHY AHEW MATTERS

The approximately 75 g/eq AHEW determines theoretical hardener demand relative to resin EEW.
For a resin around EEW 190 g/eq, theoretical demand is approximately 39.5 phr.
This aligns closely with the current 40 g/100 g reference mix ratio.
Using a different hardener's AHEW would create a stoichiometric error.
AHEW does not predict cure speed by itself, so gel time and final properties must be considered separately.

WHY GEL TIME MATTERS

Current product-specific gel time is approximately 40 minutes.
Older ambient-curing selector data list approximately 30 minutes, but the current value should take precedence.
Gel time gives a standardized indication of reactivity but not the full practical application window.
Self-leveling and wetting can begin deteriorating before formal gelation.
The final formulation should therefore define practical pot life and application limits separately.

BENZYL-ALCOHOL-FREE STATUS

Ambient-curing selector literature marks ARADUR 847 as benzyl-alcohol-free.
This is useful in formulations designed to avoid benzyl alcohol as a viscosity modifier or cure aid.
The complete formulation should still be reviewed because other raw materials can introduce benzyl alcohol.
Formal restricted-substance declarations should rely on current product-specific documentation.
Benzyl-alcohol-free status does not by itself define VOC, food-contact or water-contact compliance.

TDS, SDS AND COA

The current product-specific Technical Data Sheet should control present specifications, application recommendations and resin-specific mix ratios.
The Safety Data Sheet governs formal component disclosure, hazard classification, first aid, firefighting, storage, transport and disposal.
The Certificate of Analysis provides batch-specific controlled values where supplied.
Current product information supports the 150-300 mPa·s viscosity, 350-375 mg KOH/g amine value, 1.01 g/cm³ density, 105°C flash point, 40-minute gel time and 40 g/100 g reference mix ratio.
Current and modern selector literature support AHEW around 75 g/eq, Gardner color ≤2 and civil-engineering / industrial-maintenance / marine-coating positioning.
Where older selector values such as the approximately 30-minute gel time differ from current product-specific data, current product-specific information should take precedence.

SAFETY AND HANDLING

ARADUR 847 is a reactive amine hardener and current handling information identifies severe eye and skin irritation as important hazards.
Direct contact with skin, eyes and clothing should be avoided.
Chemical-resistant gloves, suitable eye protection and protective clothing should be selected through workplace risk assessment.
Mist and vapor should not be inhaled.
Adequate ventilation should be used during mixing, transfer and application.
Containers should remain tightly closed when not in use and hands and exposed skin should be washed thoroughly after handling.

FIRST AID

After skin contact, contaminated clothing should be removed and affected skin washed thoroughly according to the current SDS.
If product enters the eyes, immediate prolonged rinsing with clean water should begin and prompt medical attention should be obtained.
If mist or vapor is inhaled and symptoms occur, move the affected person to fresh air and obtain appropriate medical advice.
After accidental ingestion, follow the current product-specific SDS and professional medical guidance.
The exact first-aid procedure should always be taken from the current SDS supplied with the product.

SPILL MANAGEMENT

Spilled ARADUR 847 is a low-viscosity liquid and can spread across floors rapidly.
The area should be contained promptly and personnel should use appropriate PPE.
The material should be prevented from entering drains, soil, groundwater or natural waterways.
Compatible absorbent can be used for smaller spills, while larger releases may require pumping or specialized response.
Recovered product and contaminated cleanup material should be placed in correctly labeled waste containers.
Current SDS and local requirements should control final disposal.

FIRE RESPONSE

ARADUR 847 has a current flash point of approximately 105°C by closed-cup testing.
The product can burn or decompose under severe heating despite the relatively high flash point.
Thermal decomposition can generate hazardous fumes and smoke.
Firefighters may require self-contained breathing apparatus and appropriate protective clothing.
Extinguishing media and emergency procedures should follow the current product-specific SDS and site fire plan.

STORAGE

Current product information states that ARADUR 847 should be stored at room temperature in the original sealed container.
The container should remain tightly closed when not in use.
Direct sunlight, uncontrolled heat and contamination should be avoided.
Moisture and atmospheric carbon dioxide exposure should be minimized because reactive amines can interact with the environment.
The exact approved temperature range and shelf life should be taken from current product-specific documentation and the original package expiry information.

REGULATORY CONSIDERATIONS

ARADUR 847 is a proprietary modified cycloaliphatic polyamine-adduct curing agent.
Current product labeling identifies the grade as Food Contact Acceptable.
This claim must be interpreted through current jurisdiction-specific product documentation and does not automatically make every finished epoxy formulation compliant.
Tank-lining, sewage-treatment or water-related end-use positioning does not automatically establish potable-water approval.
The finished formulation must be evaluated separately because resin, pigments, fillers and additives all affect regulatory status.
Formal compliance statements should therefore rely on current product-specific and finished-system documentation.

ENVIRONMENTAL CONSIDERATIONS

ARADUR 847 should not be released directly to drains, soil or natural waterways in uncured form.
Partial water solubility does not make uncontrolled discharge acceptable.
Cleaning waste can contain resin, hardener, pigments, fillers and cleaning media and should be managed appropriately.
Large masses of mixed resin and hardener can generate heat during cure and should not be accumulated in uncontrolled waste containers.
High-solids and solventless formulation can reduce conventional solvent emissions when the rest of the formulation is designed accordingly.
Fully cured epoxy has different mobility and reactivity from uncured raw materials, but disposal requirements remain jurisdiction specific.

COMMON FORMULATION PROBLEMS

Pot life shorter than expected
Warm components, large batch size or reactive pigments can shorten working time. Reduce batch size and standardize resin, hardener and substrate temperature.

Self-leveling floor stops flowing
The mixture may be too advanced in pot life, too highly filled or too thixotropic. Apply earlier and optimize rheology.

Filler settlement
Low binder viscosity can allow dense mineral filler to settle. Improve particle-size distribution and low-shear structure without sacrificing leveling.

Sagging on vertical surfaces
ARADUR 847 is low in viscosity. Increase compatible anti-sag rheology or reduce wet-film thickness.

Poor gloss
Air entrapment, pigment flocculation, blush, excessive filler or late-pot-life application can reduce gloss. Review formulation and application timing.

Amine blush
ARADUR 847 has good blush resistance, but cold humid conditions can still create surface deposits. Clean the surface before recoating if contamination is present.

Surface exudation
The grade has exudation-resistant positioning, but incorrect stoichiometry or incompatible additives can still create oily surface defects. Verify ratio and compatibility.

Pinholes
Concrete outgassing or entrained mixing air can create pinholes. Improve priming, deaeration and substrate-temperature control.

Foaming
High-speed mixing can entrain air. Use controlled agitation and a suitable defoamer strategy.

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

Brittle film
A rigid resin, excessive filler or off-ratio cure can reduce impact tolerance. Rebalance the formulation.

Poor adhesion to concrete
Weak laitance, dust, oil, curing compounds or unsuitable moisture condition can prevent bonding. Correct substrate preparation before changing chemistry.

Poor adhesion to steel
Oil, salts, rust or inadequate blast profile can reduce adhesion. Improve surface preparation and verify dew-point conditions.

Poor chemical resistance
Incomplete cure, incorrect ratio or unsuitable resin can reduce resistance. Allow full cure and test the actual service chemical.

Poor acid resistance
The acid may be too concentrated, hot or aggressive for the selected resin. Test the exact service condition rather than relying on generic acid-resistance 
positioning.

Poor alkali resistance
Hot concentrated alkaline exposure can exceed general coating capability. Validate the complete cured system.

Poor solvent resistance
Solvent uptake can increase in undercured or highly diluted formulations. Verify cure completeness and resin selection.

Water whitening
Water exposure before adequate cure can cause whitening or softening. Delay immersion until the specified cure stage.

Tank lining blisters
Substrate moisture, osmotic contamination, pinholes or undercure can cause blistering. Review surface preparation and cure before immersion.

Sewage-treatment coating loses adhesion
Continuous moisture, salts or substrate movement can challenge the interface. Test adhesion after realistic immersion and chemical cycling.

Intercoat adhesion failure
Fast cure can close the chemical recoat window. Clean or abrade fully cured surfaces as required.

Unexpectedly high viscosity
Low temperature, contamination or aging can raise viscosity. Condition the material to 25°C and compare with the expected 150-300 mPa·s range.

Unexpectedly low viscosity
Dilution, excessive temperature or incorrect material can lower viscosity. Check density, amine value and functional cure.

Mix ratio copied to another resin
The current 40 g/100 g reference ratio applies to the reference epoxy system. Recalculate when resin EEW or reactive-diluent content changes.

30-minute versus 40-minute gel-time confusion
Older ambient selectors list approximately 30 minutes, while current product-specific data give approximately 40 minutes. Use the current product-specific 
value as the primary present reference.

Incorrect CAS assignment
Do not assign the CAS number of a cycloaliphatic amine building block to the complete ARADUR 847 formulation. Use the current product-specific SDS for 
formal identity.

Food-contact claim overextended
Food Contact Acceptable hardener labeling does not automatically make the final coating compliant. Confirm the complete finished system.

Potable-water claim inferred from tank or sewage applications
Tank-lining and water-treatment end uses do not automatically establish potable-water approval. Use current system-specific regulatory documentation.

Outdoor yellowing
Conventional epoxy can yellow under UV exposure despite light hardener color. Use a suitable weather-resistant finish when long-term appearance matters.

FREQUENTLY ASKED QUESTIONS

What is ARADUR 847?
ARADUR 847 is a low-viscosity, light-colored modified cycloaliphatic polyamine-adduct epoxy curing agent.

What is the viscosity?
Approximately 150-300 mPa·s at 25°C.

What is the amine value?
Approximately 350-375 mg KOH/g.

What is the active hydrogen equivalent weight?
Approximately 75 g/eq.

What is the density?
Approximately 1.01 g/cm³ at 25°C.

What is the flash point?
Approximately 105°C by closed-cup testing.

What is the Gardner color?
Maximum approximately 2.

What is the current reference gel time?
Current product-specific data give approximately 40 minutes.

Why do older selectors show 30 minutes?
Older ambient-curing selector literature reports approximately 30 minutes under an earlier comparison. Current product-specific data give approximately 40 minutes and should be treated as the primary present reference.

What is the current reference mix ratio?
Approximately 40 g ARADUR 847 per 100 g reference epoxy resin.

What is the theoretical hardener level with a resin EEW of 190?
Approximately 39.5 parts ARADUR 847 per 100 parts resin based on AHEW 75 g/eq.

What are the main current applications?
Epoxy aggregate, floorings, self-leveling floors, solventless and high-solids coatings, tank coatings, tank linings and sewage-treatment protective systems.

Can ARADUR 847 be used for self-leveling floors?
Yes. Self-leveling flooring is one of its most important documented applications.

Can ARADUR 847 be used in solventless coatings?
Yes. Solventless and high-solids coatings are primary current end-use categories.

Can ARADUR 847 be used for tank linings?
Yes. Tank coatings and tank linings are primary current end uses, subject to service-specific chemical and immersion testing.

Can ARADUR 847 be used in sewage-treatment facilities?
Yes. Sewage-treatment protective systems are included in current application positioning.

Can ARADUR 847 be used on concrete?
Yes. Concrete surfaces are included in current material compatibility.

Can ARADUR 847 be used on metal?
Yes. Metal substrates are included in current material compatibility.

Is ARADUR 847 fast curing?
Yes. Fast cure is a primary current product feature.

Does ARADUR 847 resist blush?
Yes. Good blush resistance and low-blush behavior are current product features.

Does ARADUR 847 resist exudation?
Yes. Exudation resistance is included in current product positioning.

Does ARADUR 847 provide high gloss?
Yes. High gloss is a current product feature.

Is ARADUR 847 light colored?
Yes. Current Gardner color is maximum approximately 2 and the SDS describes the liquid as light yellow and clear.

Does ARADUR 847 provide chemical resistance?
Yes. Chemical resistance is a primary current feature, with additional acid, alkali and solvent resistance documented in technical distribution data.

Does ARADUR 847 resist water?
Yes. Water resistance is a primary current feature, but continuous-immersion suitability must be validated for the complete system.

Is ARADUR 847 benzyl-alcohol-free?
Ambient-curing selector literature marks ARADUR 847 as benzyl-alcohol-free.

Is ARADUR 847 Food Contact Acceptable?
Current product labeling identifies the hardener as Food Contact Acceptable, but the complete finished formulation requires application-specific regulatory confirmation.

Does ARADUR 847 have one universal CAS number?
No. It is a proprietary modified cycloaliphatic polyamine-adduct formulation and should not be assigned one universal CAS number without the current product-specific SDS.

Is ARADUR 847 the same as isophorone diamine?
No. Cycloaliphatic amines such as isophorone diamine may be relevant building blocks, but ARADUR 847 is a modified polyamine-adduct commercial formulation and should not be identified as one pure raw-material amine.

How should ARADUR 847 be stored?
Store it at room temperature in the original sealed container and follow the current product-specific TDS, SDS and expiry information.

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

FINAL TECHNICAL SUMMARY

ARADUR 847 is a low-viscosity, light-colored modified cycloaliphatic polyamine-adduct epoxy curing agent.
Current product-specific data give approximately 150-300 mPa·s viscosity at 25°C, 350-375 mg KOH/g amine value, approximately 75 g/eq active-hydrogen equivalent weight, density around 1.01 g/cm³ at 25°C, flash point around 105°C and Gardner color ≤2.

Current product-specific application data give a reference mix ratio of approximately 40 g ARADUR 847 per 100 g reference epoxy resin.
The simple theoretical hardener demand with resin EEW near 190 g/eq is approximately 39.5 phr, closely matching the current reference ratio.
Current product-specific gel time is approximately 40 minutes.
Older ambient-curing selector literature lists approximately 30 minutes with ARALDITE GY 250, so the current 40-minute value should be treated as the primary present reference while the older value remains historical context.
Primary current end uses include epoxy aggregate, floorings, self-leveling floors, solventless and high-solids coatings, tank coatings, tank linings and sewage-treatment protective systems.

Concrete surfaces and metal substrates are current material-compatibility categories.
Current product features include chemical resistance, exudation resistance, fast cure, good blush resistance, high gloss, light color, low blush, low viscosity and water resistance.
Additional technical distribution data identify acid, alkali and solvent resistance together with excellent surface appearance.
ARADUR 847 is particularly well suited to self-leveling floors because the low viscosity supports flow and filler wetting while the cure profile supports rapid property development.

The same low viscosity helps formulate high-solids and solventless coatings with reduced reliance on conventional solvent.
Tank-lining and sewage-treatment applications benefit from water resistance, chemical resistance and strong film continuity, but immersion conditions must be qualified for the exact service.
Current product labeling identifies ARADUR 847 as Food Contact Acceptable, but this does not automatically establish compliance of every finished formulation.
Ambient-curing selector literature marks ARADUR 847 as benzyl-alcohol-free.
Published safety-property data describe ARADUR 847 as an alkaline, partially water-soluble liquid with amine-like odor and boiling point minimum around 200°C.
ARADUR 847 should not be assigned the CAS number, formula or molecular weight of a cycloaliphatic raw-material amine such as isophorone diamine because the commercial grade is a modified adduct formulation.
ARADUR 847 is therefore best specified through its current product-specific performance values, TDS, SDS and batch COA rather than through an invented single-molecule identity.

For ARADUR 847 technical specifications, application guidance, TDS, SDS, COA and formulation support, contact Ataman Chemicals with the intended epoxy resin, substrate, chemical exposure, application temperature and required cure profile.

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