Patent ID: 9080044
Filing Date: 2015-07-14
Classification: A61J,B65D,C08L

Abstract:
1. A rubber stopper for medical treatment, which is obtained by molding a resin composition containing component (A): at least one of a block copolymer having at least two of a polymer block P containing a vinyl aromatic compound as the core and at least one of a polymer block Q containing a conjugated diene as the core and a hydrogenated block copolymer obtained by hydrogenating the block copolymer, component (B): a hydrocarbon-based softening agent for rubbers, and component (C): a polyolefin-based resin, wherein containing amount of the component (C) in the resin composition is from 1 weight part to 45 weight parts based on 100 weight parts in total of from 5 weight parts to 95 weight parts of the component (A) and from 5 weight parts to 95 weight parts of the component (B), and the resin composition has one or more peaks or one or more peak shoulders within each of the ranges of (A-1) molecular weight: from 250,000 to 350,000; (A-2) molecular weight: from 100,000 to 150,000; (A-3) molecular weight: from 400,000 to 550,000 and (A-4) molecular weight: from 150,000 to 250,000 on the styrene basis molecular weight by a gel permeation chromatography analysis.