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.

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

Knowde Enhanced TDS

Identification & Functionality

Plastics & Elastomers Functions

Features & Benefits

Labeling Claims
Materials Features

Applications & Uses

Cure Method
Plastics & Elastomers End Uses
Recommended Uses & Known Applications
jER™ YX8040 is a high purity alicyclic epoxy resin with colorless solid, that is used for optical materials e.g. LED encapsulant, adhesive for display.

Properties

Physical Form
Appearance
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.