Epikote 828

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Epikote 828 is a liquid bisphenol-A-based epoxy resin with a low molecular weight. It is one of the most widely used general-purpose epoxy resins in industrial applications due to its excellent mechanical, chemical, and thermal properties. Epikote 828 cures with various hardeners, especially amines, to form thermoset polymers with outstanding adhesion, chemical resistance, and dimensional stability. The resin is typically a clear to pale yellow viscous liquid and is soluble in most organic solvents. It is primarily used in coatings, adhesives, composites, electrical encapsulation, flooring systems, and structural materials.

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Category: Binders/Resins Tags: Composite materials, Durable adhesive, Epikote 828, epoxy resin, Heat-resistant, Industrial Adhesive

Description

Table of Contents

Epikote 828 (Epoxy Resin)

Primary Uses

Industrial Coatings

Used in heavy-duty protective coatings for metals, pipelines, marine equipment, and tanks.
Provides excellent corrosion resistance, adhesion, and chemical durability.
Suitable for solvent-free, high-build, and chemically resistant coatings.

Adhesives & Sealants

Used as a structural adhesive for bonding metals, plastics, ceramics, wood, and composites.
Ideal for two-part epoxy adhesive systems in automotive, aerospace, and construction.
Enhances thermal and impact resistance in bonded assemblies.

Electrical & Electronics

Encapsulates transformers, capacitors, and PCB components due to high dielectric strength.
Used in potting compounds and insulative coatings to protect sensitive electronics.
Provides resistance to thermal cycling, moisture ingress, and short circuits.

Composite Materials

Matrix resin for fiber-reinforced composites (e.g., fiberglass, carbon fiber) in wind turbines, sporting goods, and aerospace structures.
Offers high strength-to-weight ratio and dimensional stability.
Compatible with vacuum infusion and filament winding techniques.

Civil Engineering & Construction

Applied in epoxy flooring systems and self-leveling floor coatings.
Used in grouts, crack repair systems, anchor bolt adhesives, and protective linings.
Suitable for concrete sealing, structural bonding, and anti-corrosion systems.

Marine & Automotive

Applied in boat hull coatings, automotive panels, and underbody protection.
Ensures resistance to fuel, saltwater, solvents, and abrasion.

Secondary Uses

Art & Decorative Applications

Used in resin art, casting, jewelry, and decorative coatings for a clear, glossy finish.
Self-leveling property makes it suitable for river tables and 3D floor designs.

Tooling & Mold Making

Used in master models, jigs, and high-temperature molds.
Cures to a durable, machinable material.

Aerospace

Applied in composite parts and bonding structures requiring precision and lightweight strength.

KEY PRODUCT FEATURES

1. Basic Identification Attributes

Chemical Name (IUPAC): 2,2’-[(1-Methylethylidene)bis(4,1-phenyleneoxymethylene)]bisoxirane
Common/Trade Name: Epikote 828
CAS Number: 25068-38-6 (mixture of epoxy resin compounds)
HS Code: 3907.30.00
Molecular Formula: (C21H24O4)n
Synonyms:
- Liquid Epoxy Resin
- Bisphenol-A Epoxy Resin
- Diglycidyl Ether of Bisphenol A (DGEBA)
- Epon 828 (equivalent product name)

2. Physical & Chemical Properties

Physical State: Clear to pale yellow viscous liquid
Viscosity (25°C): ~11,000–14,000 mPa·s
Epoxide Equivalent Weight (EEW): 185–192 g/eq
Boiling Point: Decomposes before boiling
Melting Point: Not applicable (liquid at room temperature)
Density: 1.15–1.18 g/cm³
Solubility: Soluble in alcohols, ketones, aromatic hydrocarbons
Stability: Stable under normal conditions; reacts exothermically with hardeners

3. Safety & Hazard Attributes

Hazard Class (GHS): Skin irritant (Category 2), Eye irritant (Category 2), Sensitizer (Category 1), Aquatic Chronic (Category 2)
Toxicity: May cause allergic skin reaction; harmful to aquatic life with long-lasting effects
Exposure Limits: No occupational limits established; handle as a skin sensitizer
Reactivity: Reactive with acids, bases, and amine curing agents

4. Storage & Handling Attributes

Storage Conditions: Store in tightly closed containers in a cool, dry, well-ventilated area
Container Type: Steel or HDPE drums
Shelf Life: 2 years if unopened and stored correctly
Handling Precautions: Avoid contact with skin and eyes; use PPE; avoid breathing vapors

5. Regulatory & Compliance Attributes

REACH Registration: Compliant
TSCA Listed: Yes
RoHS & WEEE: Non-compliant due to Bisphenol-A content (in some regions)
FDA Status: Not approved for direct food contact
Transportation: Not classified as a hazardous material under UN regulations (except in large quantities)

6. Environmental & Health Impact

Biodegradability: Poor; persistent in environment
Ecotoxicity: Harmful to aquatic life (chronic)
Bioaccumulation: Low potential
Carcinogenicity/Mutagenicity: Not classified as carcinogenic

SAFETY HANDLING PRECAUTIONS

Safety Handling Precautions

PPE Required:

Chemical-resistant gloves (e.g., nitrile)
Safety goggles or face shield
Protective clothing or apron
Respirator (for spray or heated applications)

Handling Guidelines:

Use in well-ventilated area
Avoid prolonged or repeated skin contact
Prevent release into drains or waterways
Avoid mixing with strong acids or oxidizers

Storage Measures:

Keep container tightly sealed
Store in cool, dry area (10–30°C)
Protect from direct sunlight and heat sources
Keep away from incompatible materials (amines, acids)

Hygiene Practices:

Wash hands after handling
Avoid eating or drinking during handling
Remove contaminated clothing and wash before reuse
Decontaminate work areas regularly

First Aid Measures

Inhalation: Move to fresh air; seek medical attention for respiratory symptoms
Skin Contact: Wash with soap and water; seek medical advice if rash or irritation develops
Eye Contact: Rinse thoroughly with water for 15 minutes; seek medical attention
Ingestion: Rinse mouth; do not induce vomiting; seek immediate medical help

Firefighting Measures

Fire Hazards: Combustible; may emit toxic fumes when burned
Extinguishing Media: Foam, dry chemical, CO₂, or water spray
Special Precautions: Wear full protective gear and self-contained breathing apparatus
Decomposition Products: CO, CO₂, phenolic compounds