Biostable polyurethane products

Details Biostable polyurethane products Biostable polyurethane products

1992-05-18

1993-10-19

Kight, III, John

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, 623 1, 623 8, 623 11, C08G 1842, C08G 1844

Patent

active

052546624

ABSTRACT:
Polyurethane products having long-term biostability in combination with a low modulus of elasticity and a high ultimate tensile strength and other desireable mechanical properties which are particularly useful as leads for implantable pacemakers, as vascular grafts, as mammary prostheses, and as other products which are intended to be placed within the body of a mammal for extended periods with no substantial degradation of the product. The polyurethanes are prepared from the reaction of an organic diisocyanate, preferably an aliphatic or cycloaliphatic diisocyanate with polycarbonate glycol chained extended with diol, diamine or a mixture of diamine and alkanolamine.

REFERENCES:
patent: 4160853 (1979-07-01), Ammons
patent: 5133742 (1992-07-01), Pinchuk

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