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US 5,478,885 AGranted
Composition of epoxy resin, epoxidized block polydiene and curing agent
AssigneeShell Oil Company
InventorsMichael A. Masse, Kailash Dangayach, James Erickson
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Abstract
The present invention provides a toughened epoxy resin composition comprising: (a) a curable aromatic epoxy resin, (b) an epoxidized low viscosity polydiene polymer wherein the polymer contains from 1.0 to 7.0 milliequivalents of epoxy per gram of polymer, and (c) a curing agent.
Claims14
A toughened epoxy resin composition comprising:
- (a) a curable aromatic epoxy resin,
- (b) an epoxidized low viscosity polydiene polymer which contains less than 5% by weight of a vinyl aromatic hydrocarbon wherein the polymer contains from 4.5 to 5.5 milliequivalents of epoxy per gram of polymer, and has the structural formula
- (A-B-A.sub.p).sub.n -Y.sub.r -(A.sub.q -B).sub.m
- wherein Y is a coupling agent or coupling monomers or initiator, and wherein A and B are polymer blocks which may be homopolymer blocks of conjugated diolefin monomers or copolymer blocks of conjugated diolefin monomers, the A blocks have a molecular weight of from 100 to 6,000 and the B blocks have a molecular weight of from 1000 to 15,000, n is greater than 0, r is 0 or 1, m is greater than or equal to 0, n+m ranges from 1 to 100, and p and q may be 0 or 1, and
- (c) a curing agent.
2 more elements
Dependencies are inferred from the claim text.