Homogeneous polyepoxide-polyanhydride compositions

Details Homogeneous polyepoxide-polyanhydride compositions Homogeneous polyepoxide-polyanhydride compositions

C - Chemistry, Metallurgy

08

L

400/5929

C08L 25/08 (2006.01) C08F 283/10 (2006.01) C08G 59/42 (2006.01) C08L 35/06 (2006.01) C08L 63/00 (2006.01)

Patent

CA 1068033

HOMOGENEOUS POLYEPOXIDE- POLYANHYDRIDE COMPOSITIONS Abstract of the Disclosure A homogeneous mixture of a polyanhydride and a polyepoxide is prepared by the copolymerization of an olefinically unsaturated monomer capable of polymerization by free-radical means with an olefinically unsaturated monoanhydride and an olefinically saturated polyanhydride in the presence of a polyepoxide and an anhydride accelerator without substantial anhydride-epoxide cross-linking. As an example, reinforcing glass fibers are impregnated with a solution of styrene, maleic anhydride, styrene-maleic anhydride copolymer, a diglycidyl ether of bisphenol A and 1-methylimidazole and the resin is thickened in situ by copolymerization of the styrene, maleic anhydride and styrene-maleic anhydride copolymer to form a moldable, homogeneous mixture of styrene-maleic anhydride copolymer, diglycidyl ether of bisphenol A, 1-methylimidazole and reinforcing glass fibers.

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