公开(公告)号：US20100190912A1

公开(公告)日：2010-07-29

申请号：US12297927

申请日：2007-04-20

申请人： Xavier D. Muyldermans ,  Hendrik DeGroot ,  Emmanuel Colchen ,  Jeffrey G. Southwick ,  Kathryn J. Wright ,  Emmanuelle Coignoul

发明人： Xavier D. Muyldermans ,  Hendrik DeGroot ,  Emmanuel Colchen ,  Jeffrey G. Southwick ,  Kathryn J. Wright ,  Emmanuelle Coignoul

IPC分类号： C08L53/02

CPC分类号： C08L53/02 ,  C08F297/044 ,  C08L53/025 ,  C08L2666/02 ,  C08L2666/24

摘要： The present invention relates to a thermoplastic elastomer composition having a durometer hardness (ASTM D2240) of Shore A 30 to 90 comprising: a) 100 parts by weight of a hydrogenated styrenic block copolymer comprising at least two blocks (A) of a polymer containing 50% wt or more monovinyl aromatic hydrocarbon units, and at least one selectively hydrogenated block (B) of a polymer containing 50% wt or more conjugated diene units, wherein the monovinyl aromatic hydrocarbon content is in the range of from 10 to 50 wt %, based on the total weight of block copolymer, wherein the vinyl content in the initially prepared poly(conjugated diene) block (B) is in the range of from 30 to 80%, and wherein the hydrogenated styrenic block copolymer has a degree of hydrogenation of at least 30% with respect to the residual olefinic unsaturation in the block (B), which block copolymer optionally may be mixed with a diblock copolymer having one poly(monovinyl aromatic hydrocarbon) block and one poly(conjugated diene) block, in an amount of up to 40 wt %, b) from 20 to 150 parts by weight of a polyolefin (II); and c) from 50 to 300 parts by weight of a rubber softener (III), preferably a paraffinic processing oil; and optionally d) from 0 to 300 parts by weight of a filler, characterized in that (i) the hydrogenated styrenic block copolymer (I) has a peak average apparent molecular weight of at least 250 kg/mole (ASTM D-5296), and (ii) the polyolefin (II) is a mixture of a high density polyethylene (IIa), having a MFR at 190° C./2.16 kg of from 5 to 50 g/10 min., and of a polypropylene (IIb), having a MFR at 230° C./2.16 kg of from 1 to 40 g/10 min., (ASTM D1238), in a weight ratio (IIa)/(IIb) of from 0.2 to 5.

摘要翻译： 本发明涉及具有肖氏A 30至90的硬度计硬度（ASTM D2240）的热塑性弹性体组合物，其包含：a）100重量份的氢化苯乙烯嵌段共聚物，其包含至少两个含有50个 ％重量或更多单乙烯基芳族烃单元，和至少一种含有50重量％或更多个共轭二烯单元的聚合物的选择性氢化嵌段（B），其中单乙烯基芳族烃含量为10至50重量％ 基于嵌段共聚物的总重量，其中初始制备的聚（共轭二烯）嵌段（B）中的乙烯基含量为30〜80％，其中氢化苯乙烯系嵌段共聚物的氢化度为 相对于嵌段（B）中的残余烯属不饱和度为至少30％，该嵌段共聚物任选地可以与具有一个聚（单乙烯基芳族烃）嵌段和一个聚（单乙烯基芳烃）嵌段的二嵌段共聚物混合， 共轭二烯）嵌段，其量最多为40重量％，b）20至150重量份的聚烯烃（II）; 和c）50至300重量份的橡胶软化剂（III），优选石蜡加工油; 和任选的d）0至300重量份的填料，其特征在于（i）氢化苯乙烯嵌段共聚物（I）的峰值平均表观分子量为至少250kg / mole（ASTM D-5296）， 和（ii）聚烯烃（II）是高密度聚乙烯（IIa）的混合物，其MFR为190℃/ 2.16kg，为5-50g / 10min。聚丙烯（IIb） ，在230℃/ 2.16kg（1〜40g / 10min）（ASTM D1238）中的MFR为0.2〜5的重量比（IIa）/（IIb）。