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On January 31, 2021, Hexion Holdings Corporation announced that it has completed the sale of its Coatings and Composite businesses, which includes the epoxy specialty resins and base epoxy resins and intermediates product lines, to Westlake Chemical Corporation. For epoxy coatings and composite product inquiries, please contact customer service at or

EPI-REZ™ Resin 3515-W-60 Europe


EPI-REZ Resin 3515-W-60 is a moderate viscosity, non-ionic, aqueous dispersion of a bisphenol A epoxy resin. EPI-REZ Resin 3515-W-60 is supplied at typically 60 percent non-volatiles and is mechanically stable. No organic solvents are present.


  • High epoxy functionality
  • Water reducible, providing wide latitude for viscosity reduction
  • Imparts good chemical and water resistance properties
  • Compatible with most synthetic polymer lattices
  • Curable with most water soluble curing agents

Sales Specification

Property Standard Value Unit Test Method
Epoxy Group Content 3636 - 4444 mmol/kg ASTM D1652
Particle Size Cl, Dv (Vol Mean) 0.5 - 1.3 µm SRC - 1
pH 3 - 6 ASTM E70
Solids 62 - 64 % m/m ASTM D1259
Viscosity * at 25°C 4000 - 15000 mPa.s ASTM D2196

* Brookfield

Typical Properties

Property Standard Value Unit Test Method
Density at 25°C 1.103 kg/L ASTM D4052
Epoxy Equivalent 225 - 275 g/eq* ASTM D1652
Solvent              water

* Number of grams of resin containing 1 equivalent of epoxide (Weight per equivalent, WPE, is an alternative term).

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