Patent ID: 6613839
Filing Date: 2003-09-02
Classification: C08G,C08L,Y10T

Abstract:
An epoxy resin composition comprisinga) a polyepoxide, b) a complex of a catalyst and a cure inhibitor, wherein the cure inhibitor is selected from the group consisting of boric acid, a Lewis acid derivative of boron, an alkyl borane, a mineral acid having a nucleophilicity value â€œnâ€  of greater than zero and less than 2.5, an organic acid having a pKa value of 1 or more, but not more than 3, and a mixture of two or more therefore wherein the molar ratio of the inhibitor to the catalyst is from 0.1:1.0 to 4.0:1.0 such that the gel time of the resin can be controllably adjusted to extend the gel time of the resin and the catalyst amount is sufficient to result in a substantially complete cure of the resin, and c) from 40 parts to 150 parts of at least one cross-linker per 100 parts of polyepoxide, wherein the cross-linker includes a copolymer of an ethylenically unsaturated anhydride and a vinyl compound.