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jER™ 4250

Sold by The Mitsubishi Chemical Group
Polymer Name: Epoxy Resins & Compounds
Function: Adhesion Promoter, Binder, Coupling Agent, Impact Modifier, Plasticizer
Chemical Family: Epoxy & Epoxy Derivatives
Compatible Substrates & Surfaces: Concrete, Glass, Fibers & Fabrics, Metal, Steel, Plastics, Aluminum, Ceramic
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Available upon quote
Minimum Order Quantity
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Lead Time
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Available Incoterms
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Regional Availability
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TypeDocument Name
Technical Data Sheet
jER™ 4250 Technical Data Sheet
jER™ 4250 Technical Data Sheet
Technical Data Sheet
Safety Data Sheet
jER™ 4250 Safety Data Sheet
jER™ 4250 Safety Data Sheet
Safety Data Sheet
jER™ Epoxy Resin Series Brochure
jER™ Epoxy Resin Series Brochure

Knowde Enhanced TDS

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Identification & Functionality

jER™ 4250 Features & Benefits

  • Highly adhesive to metal, porcelain, concrete
  • Excellent insulation property
  • High heat resistance
  • High chemical resistance
  • High water resistance

Applications & Uses


Physical Form
Pale yellow solid
Physical Properties
ValueUnitsTest Method / Conditions
Glass Transition Temperature70°CDifferential Scanning Calorimetry
Viscosity (at 25°C, 40% Solid Butyl Carbitol)max. Z8+-Gardner-Holdt
Typical Properties
ValueUnitsTest Method / Conditions
Epoxy Equivalent Weight (WPE)*7500 - 8900g/eqPotentiometric Titration
MEK Content* max. 3%GC
Molecular Weight59,000--

*based on Mitsubishi Chemical test methods.

Technical Details & Test Data

Typical Reactions with Representative Hardeners

Typical Reactions with Self Polymerization

Selection of Hardeners

Appropriate choice of Hardener for a desired curing temperature

General Ways to Use Epoxy
  • Epoxy resin forms 3D crosslinked network structure
  • Abundant choices of Epoxy/Hardener combination


Packaging & Availability

Packaging Type
Packaging Information
Paper bag with 25 kg net

Storage & Handling

Shelf Life
3 months
Storage and Handling

jER™ 4250 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.

jER™ 4250
The Mitsubishi Chemical Group