Thermosetting coating composition useful as primer and chip resi

Details Thermosetting coating composition useful as primer and chip resi Thermosetting coating composition useful as primer and chip resi

1983-12-22

1985-08-06

Bleutge, John C.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

525440, 525450, 525528, 525533, C08L 6302, C08L 6704

Patent

active

045335346

ABSTRACT:
Novel epoxy-polyester graft copolymer and novel, solvent-based thermosetting coating composition comprising said copolymer and blocked polyisocyanate crosslinking agent. Coating composition may be formulated as hot sprayable, high solids coating composition suitable for use as chip resistant automotive vehicle primer adapted for use on body panel areas subject to chipping by stones, gravel and other road debris. Alternatively, composition may be formulated as a high solids composition sprayable with conventional spraying equipment. Epoxy-polyester graft copolymer is prepared by polymerization of lactone monomers in presence of hydroxy functional epoxy ester resin precursor. Precursor resin is formed by reaction of diepoxide, previously chain extended with dicarboxylic acid, with hydroxy functional secondary amine in chain terminating reaction.

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