PRODUCTS

ARALDITE GY 285

ARALDITE GY 285 is a low-viscosity liquid epoxy resin based on bisphenol-A diglycidyl ether (DGEBA) chemistry, developed for versatile industrial epoxy formulations.
ARALDITE GY 285 is characterized by very good flow properties, efficient filler wetting, and balanced mechanical performance after curing.
ARALDITE GY 285 is widely used in coatings, adhesives, casting systems, electrical encapsulation, and composite matrices.

CAS Number: 25068-38-6
EC Number: 500-033-5
Molecular Formula: (C21H24O4)n

Synonyms: Epichlorohydrin–bisphenol A resin, Diglycidyl ether of bisphenol A, Modified BPA epoxy resin, Low-viscosity epoxy resin, Difunctional epoxy resin, Poly(bisphenol A-co-epichlorohydrin) resin, Bisphenol A diglycidyl ether (modified), DGEBA resin (low viscosity grade), Bisphenol A epoxy resin, Liquid epoxy resin BPA type

ARALDITE GY 285 is a liquid epoxy resin based on diglycidyl ether of bisphenol-A (DGEBA) technology, developed for industrial epoxy systems that require reliable processing performance combined with balanced mechanical and chemical properties.
ARALDITE GY 285's relatively low viscosity at ambient temperature allows efficient mixing, easy pumping, and excellent wetting of fillers, pigments, and reinforcing fibers.
This characteristic makes ARALDITE GY 285 particularly suitable for coatings, adhesives, casting formulations, and fiber-reinforced composite applications where homogeneous dispersion and good substrate penetration are essential.

The molecular structure of ARALDITE GY 285 contains two reactive epoxide groups per molecule, enabling controlled crosslink formation when reacted with suitable curing agents such as aliphatic amines, cycloaliphatic amines, polyamides, or anhydrides.
The resulting thermoset network provides strong adhesion, good mechanical strength, and dependable chemical resistance.
Compared to multifunctional epoxy novolac systems, ARALDITE GY 285 offers lower crosslink density but improved flexibility and impact resistance, which can be advantageous in structural bonding and flooring applications requiring toughness rather than extreme heat resistance.

Cured systems formulated with ARALDITE GY 285 exhibit good resistance to water, dilute acids, alkalis, and many industrial chemicals.
ARALDITE GY 285 demonstrates excellent adhesion to metals, concrete, wood, and composite substrates, making it widely used in construction and industrial maintenance sectors.
ARALDITE GY 285 also provides stable electrical insulation properties, allowing its use in encapsulation and potting compounds for electrical components.

Due to its formulation versatility, ARALDITE GY 285 can be modified with reactive diluents, flexibilizers, fillers, or thixotropic agents to adjust viscosity, curing speed, mechanical performance, and thermal characteristics.
ARALDITE GY 285's combination of processability, adhesion strength, and balanced durability makes ARALDITE GY 285 a widely selected base resin for industrial coatings, adhesives, flooring systems, and composite matrices.

ARALDITE GY 285 is low-viscosity unmodified bisphenol-F based liquid epoxy resin.
ARALDITE GY 285 is for use in adhesives, filament winding, casting, pultrusion, RTM, coatings and construction applications.

ARALDITE GY 285 is a low viscosity, unmodified epoxy resin based on bisphenol-F.
ARALDITE GY 285 can be mixed in any desired proportion with other epoxy resins.
ARALDITE GY 285 is used in aircraft and aerospace applications.

ARALDITE GY 285, alone or blended with epoxy resins based on bisphenol A or bisphenol A/F in combination with polyamine hardeners, is recommended for solvent-free coatings, impregnations, floorings, and trowelling compounds applied to steel and concrete substrates.
Also, when combined with aromatic diamines, GY 285 is suitable for advanced composite applications manufactured through RTM filament winding.

The reactivity of formulations based on ARALDITE GY 285 is similar to that of unmodified bisphenol A epoxy resins.
The chemical resistance of systems based on ARALDITE GY 285 is comparable to that of liquid bisphenol A epoxy resins and significantly better than that of resins modified with reactive diluents.

Under adverse storage conditions, ARALDITE GY 285 may crystallize, but this can be reversed by heating the resin to 40°C while stirring.
ARALDITE GY 285 is miscible in all proportions with other epoxy resins, and the addition of at least 25% bisphenol A epoxy resin or epoxy phenol novolac will practically eliminate the tendency to crystallize.
ARALDITE GY 285 is sanctioned by FDA 175.300 CFR for contact with food.

ARALDITE GY 285 is widely used in coatings, adhesives, casting systems, electrical encapsulation, and composite matrices.
When cured with suitable amine, polyamide, or anhydride hardeners, ARALDITE GY 285 forms a durable thermoset network with strong adhesion, good chemical resistance, and reliable mechanical strength.

Uses of ARALDITE GY 285:
ARALDITE GY 285 is used in industrial protective coatings requiring good adhesion and chemical resistance.
ARALDITE GY 285 is applied in structural and general-purpose adhesive formulations.

ARALDITE GY 285 is incorporated into casting and encapsulation systems for electrical insulation.
ARALDITE GY 285 is utilized in fiber-reinforced composite matrices for balanced strength and toughness.

ARALDITE GY 285 is formulated into industrial flooring and concrete repair systems.
ARALDITE GY 285 is used in bonding layers and maintenance coatings in construction and infrastructure applications.

Advantages of ARALDITE GY 285:
ARALDITE GY 285 provides low viscosity for improved flow and easy processing.
ARALDITE GY 285 delivers excellent wetting of fillers and reinforcing fibers.

ARALDITE GY 285 offers balanced mechanical strength with good toughness and impact resistance.
ARALDITE GY 285 ensures strong adhesion to metals, concrete, wood, and composite substrates.

ARALDITE GY 285 provides reliable chemical resistance against water, dilute acids, and alkalis.
ARALDITE GY 285 supports flexible formulation with various curing agents and modifiers.
ARALDITE GY 285 allows consistent curing performance under ambient or elevated temperature conditions.

Stability and Reactivity of ARALDITE GY 285:

Chemical stability:
Stable under normal storage conditions when kept tightly sealed and protected from moisture.

Reactivity:
Reacts exothermically with curing agents such as amines, polyamides, and anhydrides.

Conditions to avoid:
Excessive heat.
Open flames.
Moisture contamination.
Uncontrolled mixing with hardeners.

Incompatible materials:
Strong oxidizing agents.
Strong acids.
Strong bases.

Hazardous decomposition products:
Carbon oxides (CO, CO₂).
Irritating fumes during combustion.

Handling and Storage of ARALDITE GY 285:

Handling:
Avoid skin and eye contact.
Avoid inhalation of vapors or mists.
Use adequate ventilation.
Follow good industrial hygiene practices.

Storage:
Store in a cool, dry, well-ventilated area in tightly closed original containers.

Storage conditions:
Protect from direct sunlight and moisture.
Keep away from oxidizers and heat sources.

First Aid Measures of ARALDITE GY 285:

Inhalation:
Move to fresh air and keep at rest.
Seek medical attention if symptoms persist.

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

Eye contact:
Rinse cautiously with water for at least 15 minutes.
Seek medical attention if irritation continues.

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

Firefighting Measures of ARALDITE GY 285:

Suitable extinguishing media:
Foam.
Dry chemical powder.
Carbon dioxide (CO₂).
Water spray.

Specific hazards:
Combustible material.
May release toxic and irritating smoke or gases in fire.

Protective equipment:
Self-contained breathing apparatus.
Protective clothing.

Accidental Release Measures of ARALDITE GY 285:

Personal precautions:
Wear appropriate personal protective equipment.
Ensure adequate ventilation.
Avoid contact with spilled material.

Environmental precautions:
Prevent entry into drains, soil, and waterways.

Methods for cleaning up:
Absorb with inert material such as sand or vermiculite.
Collect in suitable containers for disposal.

Exposure Controls / Personal Protection of ARALDITE GY 285:

Engineering controls:
Use local exhaust ventilation, especially during mixing or spraying.

Respiratory protection:
Use approved respirator if ventilation is insufficient.

Hand protection:
Chemical-resistant gloves such as nitrile, neoprene, or butyl rubber.

Eye protection:
Safety goggles or face shield.

Skin protection:
Protective clothing to prevent prolonged or repeated contact.

Identifiers of ARALDITE GY 285:
CAS number: 25068-38-6
EC number: 500-033-5
Molecular formula: C21H24O4
Appearance: Clear to pale yellow liquid

Properties of ARALDITE GY 285:
Epoxide functionality: Difunctional
Density at 25°C: Approximately 1.15–1.20 g/cm³
Flash Point: min. 93.0°C
Flash Point: min. 200.0°C:
Viscosity: 2000.0-3000.0 mPa.s