Epikote 828 (Epoxy Resin)
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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.
Description
Epikote 828 (Epoxy Resin) Uses
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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.
PRODUCT KEY FEATURES
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)
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
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
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
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)
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
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