ARADUR 42

ARADUR 42 is particularly suitable for solvent-free and high-solids epoxy formulations where both performance and appearance are important.
ARADUR 42 provides reliable curing performance at ambient temperatures and contributes to good hardness development, chemical durability, and dimensional stability.
ARADUR 42 is widely used in solvent-free coatings, industrial flooring systems, protective coatings, and civil engineering applications where good mechanical strength, surface appearance, and durability are required.

Synonyms: 5-Amino-1,3,3-trimethylcyclohexanemethanamine, Cyclohexanemethanamine,5-amino-1,3,3-trimethyl-, Cyclohexanemethylamine,5-amino-1,3,3-trimethyl-, 1-Amino-3-, 3-Aminomethyl-3,5,5-trimethylcyclohexylamine

ARADUR 42 is a modified cycloaliphatic amine curing agent engineered for use in high-performance epoxy resin systems.
ARADUR 42 is specifically designed to deliver improved color stability, reduced yellowing tendency, and enhanced resistance to environmental exposure compared to conventional aliphatic amine hardeners.
ARADUR 42 reacts with epoxy groups through a polyaddition mechanism, forming a tightly crosslinked thermoset polymer network that provides mechanical strength, surface hardness, and long-term durability.

ARADUR 42 is particularly suitable for solvent-free and high-solids epoxy formulations where both performance and appearance are important.
ARADUR 42's balanced reactivity allows effective curing at ambient temperatures while maintaining a manageable working time for application.

Epoxy systems cured with ARADUR 42 typically exhibit strong adhesion to concrete, metal, and mineral substrates, along with good chemical resistance, abrasion resistance, and moisture tolerance.
These characteristics make ARADUR 42 widely used in decorative and industrial flooring systems, protective maintenance coatings, concrete repair compounds, and structural bonding applications in construction and infrastructure projects.

ARADUR 42 is typically used in solvent-free and high-solids epoxy formulations, including industrial floorings, protective coatings, epoxy mortars, mastics, and structural adhesives.
ARADUR 42 provides reliable curing performance at ambient temperatures and contributes to good hardness development, chemical durability, and dimensional stability.

ARADUR 42 is generally supplied as a low to medium viscosity liquid, allowing good processability and compatibility with standard liquid epoxy resins.
Due to ARADUR 42's amine functionality, proper handling precautions are required to avoid skin and eye contact.

ARADUR 42 is pure isophorone diamine (IPD), and is used to enhance the workability of coatings systems providing longer pot lives and lower viscosities.

ARADUR 42 is a modified cycloaliphatic amine curing agent designed for use with liquid epoxy resin systems.
ARADUR 42 is formulated to provide improved color stability, reduced yellowing, and enhanced chemical resistance compared to conventional aliphatic amine hardeners.

ARADUR 42 reacts with epoxy groups through a polyaddition reaction, forming a dense crosslinked thermoset network.
ARADUR 42 is widely used in solvent-free coatings, industrial flooring systems, protective coatings, and civil engineering applications where good mechanical strength, surface appearance, and durability are required.

Uses of ARADUR 42:
ARADUR 42 is used as a curing agent for liquid epoxy resins in solvent-free and high-solids systems.
ARADUR 42 is widely applied in decorative and industrial floor coatings where color stability and surface appearance are important.

ARADUR 42 is also used in protective maintenance coatings for concrete and steel, epoxy mortars and repair compounds, grouting and anchoring systems, and structural adhesives.
Additionally, ARADUR 42 is suitable for civil engineering, infrastructure, and construction applications that require durable, abrasion-resistant, and chemically resistant epoxy systems.

Liquid to semi-solid Araldite® epoxy resins or resin solutions (e.g. Araldite GY 250, GY 260 or GY 280) do not cure fully when processed solely with Aradur 42; the resulting films are brittle and tend to exude.
If formulated, as hardener for epoxy resin mortars, floorings, mastics and solvent-free mcoatings (also for corrosion resistance). 

Other Uses:
Flooring
Epoxy aggregate
Solvent-free maintenance coatings
Tank linings
Self-leveling flooring
Light colored or clear topcoats

Advantages of ARADUR 42:

Improved Color Stability:
ARADUR 42 provides reduced yellowing and maintains better appearance over time.

Enhanced Chemical Resistance:
ARADUR 42 improves resistance to fuels, oils, and industrial chemicals.

Good Mechanical Strength:
ARADUR 42 increases hardness and abrasion resistance in cured systems.

Ambient Cure Capability:
ARADUR 42 cures effectively at room temperature without external heat.

Balanced Reactivity:
ARADUR 42 offers practical working time with reliable crosslinking.

Strong Adhesion:
ARADUR 42 ensures strong bonding to concrete, steel, and mineral substrates.

Long-Term Durability:
ARADUR 42 delivers durable performance in flooring and protective coatings.

Properties of ARADUR 42:

Depending on the formulation and the epoxy resin used, the surface technologies present the following features:
Very good mechanical properties following optimal cure
Good colour stability
Good resistance to aqueous neutral and alkaline solutions

Processing of ARADUR 42:
The low viscosity of coatings and flooring systems based on ARADUR 42 facilities their application by normal means.
If applied by two-component, heated spray equipment, care should be taken not to heat either component above 37.8°C (100°F).

Stability and Reactivity of ARADUR 42:

Chemical stability:
ARADUR 42 is chemically stable under normal conditions of use, handling, and storage.

Reactivity:
Reacts exothermically with epoxy resins during curing.
No hazardous reactions under normal storage.

Conditions to avoid:
Excessive heat, moisture contamination, and contact with incompatible materials.

Incompatible materials:
Strong acids and strong oxidizing agents.

Hazardous decomposition products:
Thermal decomposition may produce carbon oxides (CO, CO₂) and nitrogen oxides (NOx).

Handling and Storage of ARADUR 42:

Handling:
Handle in accordance with good industrial hygiene and safety practices.
Avoid skin and eye contact.
Ensure adequate ventilation.

Storage:
Store in a cool, dry, well-ventilated area.
Keep containers tightly closed when not in use.

Storage conditions:
Protect from moisture, heat sources, and direct sunlight.

Packaging materials:
Store in original, compatible containers.

Shelf life:
Stable for extended periods when stored properly.

First Aid Measures of ARADUR 42:

Inhalation:
Remove person to fresh air.
Seek medical attention if symptoms persist.

Skin contact:
Wash thoroughly with soap and water.
Remove contaminated clothing.

Eye contact:
Rinse cautiously with water for several minutes.
Remove contact lenses if present and easy to do.
Seek medical attention if irritation continues.

Ingestion:
Rinse mouth.
Do not induce vomiting.
Seek medical advice.

Most important symptoms:
May cause skin and eye irritation.
Possible sensitization with repeated exposure.

Firefighting Measures of ARADUR 42:

Suitable extinguishing media:
Water spray, foam, dry chemical powder, or carbon dioxide (CO₂).

Specific hazards:
Combustible liquid.
May release toxic fumes during fire.

Protective equipment for firefighters:
Self-contained breathing apparatus and full protective clothing.

Special precautions:
Cool exposed containers with water spray.

Accidental Release Measures of ARADUR 42:

Personal precautions:
Avoid contact and ensure ventilation.
Use appropriate personal protective equipment.

Environmental precautions:
Prevent large quantities from entering drains or watercourses.

Methods for cleanup:
Absorb with inert material.
Collect for disposal according to local regulations.

Exposure Controls / Personal Protection of ARADUR 42:

Occupational exposure limits:
Not specifically established.

Engineering controls:
Adequate general ventilation recommended.

Personal protective equipment (PPE):

Respiratory protection:
Use if vapors or mists are generated.

Hand protection:
Chemical-resistant gloves recommended.

Eye protection:
Safety glasses or goggles recommended.

Skin protection:
Protective clothing recommended for prolonged exposure.

Hygiene measures:
Wash hands after handling.
Avoid eating or drinking in work areas.

Identifiers of ARADUR 42:
Product Type: Cycloaliphatic amine curing agent
Chemical Family: Epoxy hardener
Composition: Mixture of modified amine compounds
CAS Number: Mixture
EC Number: Not specifically assigned
Physical State: Liquid
Appearance: Clear to pale yellow
Function: Crosslinking agent for epoxy resins

Properties of ARADUR 42:
Aspect (visual) clear liquid
Colour (Gardner, ISO 4630) ≤ 1
Amine number (ISO 9702) 645 - 665 [mg KOH/g]
Viscosity at 25 °C (Rotary viscosity, ISO 3219) 10 - 20 [mPa s] 

Refractive index at 25°C: 1.4858 - 1.4878
H+ active equivalent: 42.5
Density at 25°C: 0.92
Flash point: ≥ 110

Physical State: Liquid
Appearance: Clear to pale yellow
Odor: Amine-like
Density (25 °C): Approx. 0.95–1.05 g/cm³
Viscosity (25 °C): Low to medium
Solubility: Partially soluble in water; miscible with epoxy resins
Reactivity: Reacts exothermically with epoxides
Curing Behavior: Ambient to moderate temperature curing
Flash Point: >100 °C (typical)