Acid epoxy-isocyanate clear coat systems

Details Acid epoxy-isocyanate clear coat systems Acid epoxy-isocyanate clear coat systems

C - Chemistry, Metallurgy

08

L

C08L 63/00 (2006.01) C08G 18/62 (2006.01) C08G 18/80 (2006.01) C08G 59/40 (2006.01) C08G 59/42 (2006.01) C08L 75/04 (2006.01) C09D 163/00 (2006.01) C09D 175/04 (2006.01)

Patent

CA 2230612

The present invention relates to resinous binders and a clear coat composition employing the resinous binders comprising a polyepoxide, a polyacid and an isocyanate. More particularly, the resinous binder comprises a polyepoxide which is reacted with a polyacid containing at least two carboxyl groups per molecule, the reaction product thereof subsequently being reacted with an isocyanate group gives rise to a binder including both ester and urethane cross-linkages.

La présente invention porte sur des liants résineux et sur une composition de revêtement transparente utilisant ces liants résineux à base d'un polyépoxyde, d'un polyacide et d'un isocyanate. Plus précisément, le liant résineux comprend un polyépoxyde que l'on fait réagir avec un polyacide renfermant au moins deux groupes carboxyle par molécule; il en résulte un produit de réaction que l'on fait réagir avec un groupe isocyanate pour former un liant comportant des liens de réticulation aussi bien ester qu'uréthane.

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