Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1987-06-11
1988-08-30
Bleutge, John C.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525450, 525528, C08G 6360, C08G 6308, C08L 6704, C08L 6302
Patent
active
047678291
ABSTRACT:
A hydroxy functional epoxy-polyester graft copolymer and solvent-based thermosetting coating composition comprising said copolymer and blocked polyisocyanate crosslinking agent. The coating composition may be formulated as a hot sprayable, high solids coating composition suitable for use as a chip resistant automotive vehicle primer adapted for use on body panel areas subject to chipping by stones, gravel and other road debris. Alternatively, the composition may be formulated as a high solids composition sprayable with conventional spraying equipment. The hydroxy-functional epoxy-polyester graft copolymer is prepared by polymerization of lactone monomers in the presence of hydroxy functional epoxy ester resin precursor. Such precursor resin is formed by reaction of diepoxide chain extended with dicarboxylic acid and chain terminated with acid component comprising primary hydroxy functional acid.
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Dervan Andrew H.
Grebur Dennis J.
Kordomenos Panagiotis I.
Bleutge John C.
E. I. Du Pont de Nemours and Company
Sellers II Robert E.
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