Copolymers containing isocyanate and acid anhydride groups,...

Details Copolymers containing isocyanate and acid anhydride groups,... Copolymers containing isocyanate and acid anhydride groups,...

C - Chemistry, Metallurgy

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C08F 246/00 (2006.01) C08F 220/36 (2006.01) C08F 222/04 (2006.01) C08G 18/62 (2006.01) C08G 18/72 (2006.01) C09D 7/12 (2006.01) C09D 133/06 (2006.01) C09K 3/10 (2006.01)

Patent

CA 1300303

Copolymers Containing Isocyanate and Acid Anhydride Groups, A Process for Their Preparation and Their Use as Binder Components ABSTRACT OF THE DISCLOSURE Copolymers useful in binders for two-component coating compounds or sealing compounds are copolymers having a weight average molecular weight, determined by the gel permeation chromatography method, of from 1500 to 75,000 of olefinically unsaturated compounds containing chemically incorporated moieties capable of undergoing an addition reaction with hydroxyls wherein the copolymers contain, as hydroxyl reactive groups, both (i) from 0.3 to 7.0% by weight of free isocyanate groups and (ii) from 1 to 25% by weight of acid anhydride groups, calculated as C4H2O3, in a chemically bound form. Le A 25 838

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