Polysiloxane graft copolymers, flexible coating compositions...

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

C - Chemistry, Metallurgy

09

D

400/2008

C09D 183/07 (2006.01) C08F 283/12 (2006.01) C08F 290/06 (2006.01) C08F 290/14 (2006.01) C08F 299/08 (2006.01) C08G 18/46 (2006.01) C08G 18/63 (2006.01) C08G 77/38 (2006.01) C09D 155/00 (2006.01)

Patent

CA 1324695

Abstract of the Disclosure Hydroxy functional polysiloxane graft copolymers are provided. The copolymer is crosslinkable by hydroxy-reactive crosslinking agent and, in particular, is suitable for use in thermosetting coating compositions adapted to form a flexible cured coating over a variety of substrates, such as metal and plastic. The copolymer has a number average molecular weight between about 1000 and about 15.000, has a hydroxyl number between about 30 and about 300, 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 (i) epoxy monomer having the formula: Image with (ii) hydroxy functional polysiloxane reactant containing 0-10 urethane linkages per molecule.

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