This invention, building a bridge in melted mixing (a) the isobutylene polymer 100 mass section which possesses the arukeniru basis in the end, (b) the polyolefine 5 - 100 mass sections and (under existing of c) poly- butene 5 - 100 mass sections, (d) with hidoroshiriru basic content chemical compound, the composition which becomes (the A component) with, the ultrahigh molecular weight polyethylene powder (the B component) with is medicine medical application rubber combination ones which feature that it includes. According to main invention the description above, in comparison with former thermoplastic elastomer, or deformation does not occur with under hot condition, possesses sufficient resistance permanent deformation characteristic, possesses the mechanical physical properties which are superior, the gas barrier characteristic which water absortion power and reactivity, is superior low low possesses, medicine medical application rubber combination ones and which it withstands in hot sterilization it is possible to offer the formation item.本発明は、(a)末端にアルケニル基を有するイソブチレン系重合体100質量部を、(b)ポリオレフィン5~100質量部および(c)ポリブテン5~100質量部の存在下で、(d)ヒドロシリル基含有化合物により、溶融混練中に架橋してなる組成物(A成分)と、超高分子量ポリエチレンパウダー(B成分)とを含むことを特徴とする医薬・医療用ゴム配合物である。上記本発明によれば、従来の熱可塑性エラストマーに比べ、高温の条件下でも変形が生じず、充分な耐永久歪み性を有し、優れた機械的物性を有し、低吸水性、低反応性、優れたガスバリヤ性を有し、高温滅菌にも耐える医薬・医療用ゴム配合物および成形品を提供することができる。
