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jER™ YX8040

jER™ YX8040 is a hydrogenated bisphenol A-type solid epoxy resin, with high molecular weight. It can be used for optical materials such as LED encapsulants and adhesives for displays.FeaturesHigh purityTransparencyLED-curableUV-curable *jER™ is provided by Mitsubishi Chemical Corporation, a member of the Mitsubishi Chemical Group.

Brand: jER™ Epoxy (18 products)

Polymer Name: Epoxy Resins & Compounds

Functions: Adhesion Promoter, Binder & Resin, Coupling Agent, Resin, Resins, Binders & Matrix Materials

Chemical Family: Epoxy & Epoxy Derivatives

Labeling Claims: High Purity

Enhanced TDS

Enhanced TDS

Knowde-enriched technical product data sheet

Identification & Functionality

Features & Benefits

Labeling Claims
CASE Ingredients Features
Materials Features

Applications & Uses


Physical Form
Colorless solid
Typical Physical Properties
ValueUnitsTest Method / Conditions
Refractive Index (589nm)1.50D line
Physical Properties
ValueUnitsTest Method / Conditions
Total Chloride500ppmPotentiometric Titration
Typical Properties
ValueUnitsTest Method / Conditions
Epoxy Equivalent Weight (WPE)900 - 1500g/eqPotentiometric Titration
Softening Point70 - 100°CRing and ball method
Viscosity (at 25°C)2.9Pa.s
Properties Formulation

  Value Unit Method
jER™ YX8040 50 0 phr  
jER™ YX8000 50 100 phr  
Anhydride curing agent Methylhexahydrophthalic anhydride/Hexahydrophthalic anhydride = 70/30) 48 83 phr  
Curing accelerator (Methyltributylphosphonium dimethylphosphate) 1 1 phr  
Gel time @ 120 °C 21 32    
Curing condition 100°C/3h + 130°C/3 h
Cured State Properties
Heat deflection temperature 108 118 °C  

Light resistance (Weathermeter, 0.4kw/m^2)

Yellowness index

0hr 1 1 -  
168hr 4 9 -  

Light transmittance at 360 nm

0hr 85 84 %  
168hr 78 50 %  

Technical Details & Test Data

Izod Impact Strength Data

jER™ YX8040 - Izod Impact Strength Data

Packaging & Availability

Packaging Type
Packaging Information
Paper bag with 20 kg net

Storage & Handling

Shelf Life
3 months
Storage and Handling

Carefully read the SDS before using, handling, transporting, storing or disposing. jER™ YX8040 should be stored in tightly closed containers under exclusion of humidity at gentle temperatures. Avoid exposure to direct sunlight. Under these storage conditions the product has a minimum shelf life of three months from date of delivery.