Epoxy resin CYD-128 (equivalent grade E-51) is a universal standard product of bisphenol A liquid epoxy resin. It is a low viscosity, high epoxy value thermosetting resin widely used in adhesives, coatings, electronic packaging, and composite material substrates.

Core parameters and characteristics
-Chemical essence: Bisphenol A glycidyl ether (non phenolic epoxy resin, some commercial descriptions are incorrect), CAS number 61788-97-4
-Epoxy value: 0.48-0.54 eq/100g (corresponding to epoxy equivalent 184-194 g/eq)
-Physical state: Light yellow to colorless transparent liquid at 25 ℃, viscosity 11000-14000 mPa · s
-Key indicators: Hydrolyzable chlorine ≤ 0.10%, volatile matter ≤ 0.20%, color (Gardner) ≤ 0.5, no clear softening point (liquid)
-Main performance: Strong adhesion after curing, excellent electrical insulation, chemical corrosion resistance, low shrinkage rate, and good dimensional stability.

Main application areas
1. Adhesive: Building structural adhesive (such as steel adhesive), aviation/automotive structural adhesive, AB adhesive main agent
2. Coatings: heavy-duty anti-corrosion coatings, floor paints, powder coatings, and ink based materials
3. Electronic and electrical: Circuit board packaging, transformer/transformer insulation material casting
4. Composite materials: glass fiber laminated board, carbon fiber prepreg matrix
5. Civil engineering: Concrete reinforcement, waterproofing and anti-corrosion mortar modification.

Precautions
-Alias clarification: Often referred to as “E-51″, it is not phenolic epoxy resin (some e-commerce materials describe it incorrectly), but rather a typical bisphenol A liquid epoxy.
-Storage requirements: Seal and store in a cool and dry place to avoid moisture absorption, which may cause viscosity increase or premature reaction.
-Safety reminder: Although not highly toxic, direct contact with the skin/eyes may cause irritation. Protective equipment should be worn during operation.

Products :

Epoxy resin CYD-128 CAS 25068-38-6
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