Polysiloxane graft copolymers, flexible coating compositions com

Details Polysiloxane graft copolymers, flexible coating compositions com Polysiloxane graft copolymers, flexible coating compositions com

1988-02-02

1989-02-14

Marquis, Melvyn I.

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

Synthetic resins

From silicon reactant having at least one...

525474, 525476, 525477, 525479, 528 26, 528 27, 528 32, 528 33, 528 41, C08G 7704

Patent

active

048047325

ABSTRACT:
A thermosetting coating composition adapted to form a flexible cured coating over a variety of substrates, such as metal and plastic containing a hydroxy functional urethane modified polysiloxane graft copolymer and an alkylated melamine crosslinking agent. The copolymer has a number average molecular weight between about 1,000 and about 4,000, has a hydroxyl number between about 30 and about 300, contains about 1-10 urethane linkages per molecule and is the reaction product of carbon-carbon double bond-reactive monoethylenically unsaturated monomer with hydroxy functional carbon-carbon double bond-bearing branched polysiloxane macromer. The macromer is the reaction product of glycidyl methacrylate and hydroxy functional polysiloxane reactant containing 1-10 urethane linkages per molecule.

REFERENCES:
patent: 4208471 (1980-06-01), Bresak et al.
patent: 4673718 (1987-06-01), Ryntz et al.

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