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On February 1, 2022, 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 5520-W-60


EPI-REZ™ 5520-W-60 Resin is a nonionic, aqueous dispersion of urethane modified epoxy resin with a typical epoxide equivalent weight of 540. Supplied at a nominal 60 percent nonvolatiles, EPI-REZ 5520-W-60 has a moderate viscosity and is mechanically stable. No organic solvents are present. EPI-REZ 5520-W-60 is completely water reducible, providing wide latitude for viscosity reduction. Since this dispersion is thixotropic, viscosity readings will vary with spindle speed. (See Figure 1).

Sales Specification

Property Standard Value Unit Test Method
Particle Size 0.6 - 1.2 µm SRC - 1
pH 3 - 5 ASTM E70
Solids 57 - 59 % ASTM D1259
Viscosity 2000 - 15000 cP ASTM D2196
Weight per Epoxide 480 - 560 g/eq ASTM D1652

Typical Properties

Property Standard Value Unit Test Method
Pounds/Gallon 9.2 lbs/gal
Solvent Water

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