| abstract |
(1) a hard segment in an amount of 10% to 60% by weight ratio of the elastomer polymer, the hard segment containing urethane, urea or urethane urea, and (2) the elastomer polymer An elastomer polymer comprising soft segments in an amount of 40% to 90% by weight. The soft segment comprises (a) at least 2% by weight of the soft segment, at least one of at least one polyether macrodiol and at least one polycarbonate macrodiol, and (b) at least by weight of the soft segment. 2% of at least one of polyisobutylene macrodiol and diamine. |