Sinocure Chemical Group Co.,Ltd.

Sinepoxy® Multifunctional Epoxy Resins&Curing agent

Sinepoxy® CER-421

Sinepoxy® CER-421 is an Cycloaliphatic Epoxy Resins, equivalent to 2021P, ERL4221, UVR6105, and CY179. It is widely used in electronic insulation,electronic sealing materials and cationic curing systems.

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Sinepoxy® CER-421

Chemical Name: 3,4-Epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylate;BIS-(EPOXYCYCLOHEXYL)-METHYLCARBOXYLATE

CAS No.: 2386-87-0

Molecular Formula:C14H20O4

Molecular Weight252.31

Molecular Structure:


Item Specifications
Appearance Colorless transparent liquid
Purity , % ≥97.0
Specific Gravity ,( 25/25℃) 1.150~1.174
Water , % by wt ≤0.2
Color(pt-co) ≤50
Total chloride ,ppm ≤100
Viscosity( 25℃),cps 220~250
Epoxy Equivalent,g/eq 128~145

Packing: 200kg/Iron drum.


CER-421 can replace Daicel 2021p,Dow ERL-4221

It can be used as a casting

resin, in LED encapsulation, insulating materials, 3D printing, carbon fibre cable cores

and other composite materials, giving outstanding performance for UV resistance

and anti-radiation properties.

  • UV curable
  • Thermal curable with anhydrides
  • High TG up to 195℃
  • Excellent yellowing resistance and good UV resistance
  • Outstanding electrical insulation
  • Low halogen
  • High purity and low viscosity


1.Optical adhesives and photo curing products: such as electrical-insulating varnishes, electrical-resin porcelains, insulating sealants for semiconductors and light-emitting diode,potting of optoelectronic devices, CD manufacturing, low-viscosity UV-curing printing inks etc.

2.Outdoor electrical and electronic products in electrical casting and electronic encapsulation; especially for insulation encapsulation and adhesive bonding and electronic products for those which request high resistance to Cold & Thermal Shock.

3.Outdoor coating and solvent-free coating with better weather resistant than acrylic – polyurethane coating.

4.Active diluent: Good dilution effect without bubbles and exudate, high surface finish, No effect on the basic performance of curing material of epoxy resin, such as curing shrinkage, heat distortion temperature, impact strength and tensile strength.

5.Electrical and electronic products, civil construction, anti-corrosion coatings and other general application of bisphenol A epoxy resin. Widely used in casting, winding, encapsulation, coatings, adhesives and other fields.

6.Polyvinyl chloride polycarbonate stabilizer, oil (Lubricating oil, cylinder oil, transformer oil) additives, etc.

7.3D Printing


Being kept in dry, clean warehouse with well ventilation.

Avoid exposing to light and heating.

Protecting the product from leakage, rain and insolation during transportation.


Chemical Name

3,4-Epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylate

Cas No.







200kg/iron drum


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