公开(公告)号：EP2009055A4

公开(公告)日：2009-08-12

申请号：EP07738792

申请日：2007-03-16

申请人： KURARAY CO

发明人： JOGO YOSUKE ,  MASUDA MIKIO ,  HIGASHIDA NOBORU ,  TORIGOE SHINICHI ,  TOKUCHI KAZUKI ,  MORIGUCHI NOBUHIRO

IPC分类号： C08L53/02

CPC分类号： C08F8/04 ,  C08L53/025 ,  C08F297/04 ,  C08L2666/04 ,  C08L2666/02

摘要： Disclosed is a thermoplastic elastomer composition which is composed of 35-50 parts by mass of a hydrogenated block copolymer (a) having a weight average molecular weight of 70,000-120,000, 30-50 parts by mass of a softening agent (b) for rubber, and 5-25 parts by mass of a polystyrene resin (c) having a weight average molecular weight of 100,000-400,000 (provided that the total of (a), (b) and (c) is 100 parts by mass). The hydrogenated block copolymer (a) is obtained by hydrogenating a block copolymer having at least two polymer block A's mainly containing a vinyl aromatic compound unit and at least one polymer block B mainly containing a conjugated diene unit. In this hydrogenated block copolymer (a), the vinyl aromatic compound unit is contained in an amount of 35-45% by mass, and not less than 50% of carbon-carbon double bonds respectively derived from the conjugated diene in the polymer block B is hydrogenated.

摘要翻译： 本发明公开了一种热塑性弹性体组合物，其由35-50质量份重均分子量为70,000-120,000的氢化嵌段共聚物（a），30-50质量份橡胶用软化剂（b） （a），（b）和（c）的总和为100质量份）的5-25质量份的重均分子量为100,000-400,000的聚苯乙烯树脂（c）。 氢化嵌段共聚物（a）通过氢化具有至少两个主要含有乙烯基芳族化合物单元的聚合物嵌段A和至少一个主要含有共轭二烯单元的聚合物嵌段B的嵌段共聚物而获得。 在该氢化嵌段共聚物（a）中，乙烯基芳香族化合物单元的含量为聚合物嵌段B中分别来自共轭二烯的35-45质量％和不少于50％的碳 - 碳双键 被氢化。