Biostable segmented aliphatic polyurethanes and process...

Details Biostable segmented aliphatic polyurethanes and process... Biostable segmented aliphatic polyurethanes and process...

C - Chemistry, Metallurgy

08

G

400/2012

C08G 18/10 (2006.01) C08G 18/32 (2006.01) C08G 18/38 (2006.01) C08G 18/75 (2006.01)

Patent

CA 1313280

BIOSTABLE, SEGMENTED ALIPHATIC POLYURETHANES AND PROCESS THEREFOR ABSTRACT Highly stable, segmented, aliphatic polyurethanes prepared by particular processes are disclosed. The segmented polyurethanes of this invention are substantially free of ester and ether linkages and are found to be particularly hydrolytically and oxidatively stable. The polyurethanes of this invention are prepared by a particular two stage process involving the formation of a prepolymer and subsequent reaction with simultaneously or sequentially added diisocyanate and diol monomers.

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