Patent ID: 6822015
Filing Date: 2004-11-23
Classification: A61J,A61L,A61M,C08L

Abstract:
A rubber composition or its crosslinked product used for a rubber stopper for a medicament or a rubber article for a medical treatment, comprising an isobutylene copolymer, as a predominant component, which is at least one member selected from the group consisting of isobutylene-isoprene copolymers (IIR), chlorinated isobutylene-isoprene copolymers (C-IIR), brominated isobutylene-isoprene copolymers (B-IIR), crosslinked isobutylene-isoprene-divinylbenzene ternary copolymers (XL-IIR) and brominated isobutylene-para-methystyrene copolymers (BIMS), wherein the rubber composition or its crosslinked product has a density of at most 0.95, and can be readily subjected to a radiation treatment.