Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1987-09-03
1989-03-14
Marquis, Melvyn I.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525528, 525533, 523454, 523455, 523464, C08G 6306, C08G 6308
Patent
active
048125350
ABSTRACT:
A solvent-based thermosetting coating composition comprising a hydroxy functional epoxy-polyester graft copolymer and blocked polyisocyanate crosslinking agent. The coating composition may be formulated as hot sprayable, high solids coating composition suitable for use as chip resistant automotive vehicle primer suitable 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 the product of polymerization of lactone monomers in the presence of hydroxy functional epoxy ester resin precursor. The precursor resin is the reaction product of diepoxide chain extended with diphenol and chain terminated with acid component comprising primary hydroxy functional acid. The polymerization of the lactone monomers is carried out at a temperature between about 50.degree. C. and about 300.degree. C. and the polymerization reaction mixture comprises between about 10 and about 80 weight percent the hydroxy functional epoxy ester resin precursor and between about 90 and about 20 weight percent lactone monomers.
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Dervan Andrew H.
Kordomenos Panagiotis I.
E. I. DuPont de Nemours and Company
Fricke Hilmar L.
Marquis Melvyn I.
Sellers II Robert E. L.
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