POLYISOBUTYLENE URETHANE, UREA AND URETHANE/UREA COPOLYMERS AND MEDICAL DEVICES CONTAINING THE SAME
First Claim
1. A polyisobutylene urethane, urea or urethane/urea copolymer comprising a polyisobutylene segment and an additional polymeric segment that is not a polyisobutylene segment.
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Accused Products
Abstract
The present invention pertains to polyisobutylene urethane, urea and urethane/urea copolymers, to methods of making such copolymers and to medical devices that contain such polymers. According to certain aspects of the invention, polyisobutylene urethane, urea and urethane/urea copolymers are provided, which comprise a polyisobutylene segment, an additional polymeric segment that is not a polyisobutylene segment, and a segment comprising a residue of a diisocyanate. According to other aspects of the invention, polyisobutylene urethane, urea and urethane/urea copolymers are provided, which comprise a polyisobutylene segment and end groups that comprise alkyl-, alkenyl- or alkynyl-chain-containing end groups.
127 Citations
28 Claims
- 1. A polyisobutylene urethane, urea or urethane/urea copolymer comprising a polyisobutylene segment and an additional polymeric segment that is not a polyisobutylene segment.
- 26. A polyisobutylene urethane, urea or urethane/urea copolymer comprising a polyisobutylene segment and further comprising end groups that comprise alkyl, alkenyl or alkynyl chains ranging from 1 to 17 carbon atoms in length.
Specification