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    • 7. 发明授权
    • Compositions of butyl elastomers and block copolymers of polyisobutylene
    • 丁基弹性体的组合物和聚异丁烯的嵌段共聚物
    • US5276094A
    • 1994-01-04
    • US974552
    • 1992-11-12
    • Gabor KaszasJudit E. Puskas
    • Gabor KaszasJudit E. Puskas
    • C08F297/06C08L23/18C08L23/22C08L23/26C08L23/28C08L53/00C08F297/00
    • C08L23/22C08F297/06C08L23/283
    • An elastomeric polymer composition that exhibits improved processability and green strength comprises: from about 95 to about 70 parts by weight of one rubbery polymer selected from the group consisting of butyl rubber, chlorinated butyl rubber and brominated butyl rubber and from about 5 to about 30 parts by weight of a block copolymer having an elastomeric polyisobutylene midblock and two plastomeric endblocks of polymerized monovinylidene aromatic monomers and star-shaped block copolymers having from three to six arms wherein the inner elastomeric blocks are polyisobutylene and the outer plastomeric blocs are polymerized monovinylidene aromatic monmers for a total of 100 parts by weight of the rubbery polymer and the block copolymer. Vulcanizates of the composition that exhibit reduced permeability to gases and improved tear strength are provided together with a process for their production.
    • 显示改善的加工性和生坯强度的弹性体聚合物组合物包括:约95至约70重量份的一种选自丁基橡胶,氯化丁基橡胶和溴化丁基橡胶的橡胶状聚合物和约5至约30重量份 的具有弹性聚异丁烯中间嵌段的嵌段共聚物和聚合的单亚乙烯基芳族单体的两个塑性端嵌段和具有三至六个臂的星形嵌段共聚物,其中内部弹性体嵌段是聚异丁烯,外部塑性嵌段是聚合的单亚乙烯基芳族单体,用于 共计100重量份的橡胶状聚合物和嵌段共聚物。 提供显示出降低的气体渗透性和改进的撕裂强度的组合物的硫化橡胶与其生产方法一起提供。