Polymalonate ester-amides

Details Polymalonate ester-amides Polymalonate ester-amides

C - Chemistry, Metallurgy

08

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C08G 18/42 (2006.01) C08G 18/18 (2006.01) C08G 18/70 (2006.01) C08G 69/44 (2006.01)

Patent

CA 1076292

2986 ABSTRACT OF THE DISCLOSURE Poly(ester amides) are obtained by heating a hydroxyl- containing or hydroxyl-free polyester of malonic acid with an organic polyisocyanate in the presence of a basic catalyst. Crosslinking of the polyester takes place by reaction of the isocyanate with the active hydrogen of the CH2 group of the malonate to give amide linkages, in addition to formation of urethane linkages in the case where the polyester contains free hudroxyl groups. The products range from elastomeric materials, where the isocyanate is in the form of an isocyanate-terminated prepolymer derived by reaction of an organic with a polyol, to more rigid plastics where the isocyanate is a "simple" isocyanate, i.e. not in prepolymer form. -1-

219711

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