Biostable, segmented aliphatic polyurethanes and process therefo

Details Biostable, segmented aliphatic polyurethanes and process therefo Biostable, segmented aliphatic polyurethanes and process therefo

1988-09-30

1989-10-10

Welsh, Maurice J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 85, C08G 1875

Patent

active

048733083

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.

REFERENCES:
patent: 4098773 (1978-07-01), Illers et al.
patent: 4191818 (1980-03-01), Illers et al.
patent: 4521582 (1985-06-01), Goyert et al.
Article entitled "Biomedical Uses of Polyurethanes", by Arthur J. Coury et al, published in Advances in Urethane Science and Technology, vol. 9, Edited by Kurt C. Frisch and Daniel Klempner, Lancaster, PA, Technomic, 1984, pp. 130-168.

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