Thermosetting epoxy ester resin paint primers

C - Chemistry – Metallurgy – 08 – G

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400/5406, 400/54

C08G 59/64 (2006.01) C08G 18/46 (2006.01) C08G 18/64 (2006.01) C08G 59/12 (2006.01) C08G 59/42 (2006.01) C08G 59/58 (2006.01)

Patent

CA 1249898

- 54 - Abstract of the Disclosure Novel solvent-based thermosetting composition comprising (a) hydroxy functional epoxy ester resin of number average molecular weight (Mn) between about 1,000 and about 5,000, being formed by reaction of diepoxide, which has been chain extended with dicarboxylic acid reactant and, optionally, diphenol reactant, with hydroxy functional secondary amine in chain terminating reaction, in approximately 1:1 molar equivalent ratio; and (b) polyfunctional, hydroxy-reactive crosslinking agent, for example, aminoplast crosslinking agent or blocked polyisocyanate crosslinking agent comprising isocyanate groups blocked by reaction with an active hydrogen bearing blocking agent. Coating composition may be formulated as primer sprayable with conventional spraying equipment.

470348

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