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1. 发明授权

US5914363A Crystalline ethylene-propylene copolymer with ethylene copolymer(s) and/or alkenyl aromatic-grafted rubber 失效
标题翻译：具有乙烯共聚物和/或链烯基芳香族接枝橡胶的结晶乙烯 - 丙烯共聚物
公开(公告)号：US5914363A
公开(公告)日：1999-06-22
申请号：US637280
申请日：1996-04-24
申请人： Hajime Sadatoshi , Kenichi Ohkawa , Teruhiko Doi , Yuichi Miyake , Takao Nomura , Takeyoshi Nishio
发明人： Hajime Sadatoshi , Kenichi Ohkawa , Teruhiko Doi , Yuichi Miyake , Takao Nomura , Takeyoshi Nishio
IPC分类号： B29C45/00 , B29K23/00 , B29K96/04 , B29L31/58 , B60R13/02 , C08K3/34 , C08L21/00 , C08L23/00 , C08L23/08 , C08L23/10 , C08L23/12 , C08L23/16 , C08L25/00 , C08L53/00 , C08L53/02 , C08K3/22 , C08L51/04
CPC分类号： C08L23/12 , C08K3/34 , C08L23/10 , C08L53/00 , C08L2205/03 , C08L2205/035 , C08L23/0815 , C08L23/16 , C08L53/02
摘要： A thermoplastic resin composition which has a melt flow rate of 25 to 30 g/10 min and a flexural modulus at 23.degree. C. of 20,000 kg/cm.sup.2 or more and which comprises (1) 78 to 87% by weight of a specific crystalline polypropylene �referred to hereinafter as (A)! in which the propylene homopolymer portion has a Q value of 3.0 to 5.0, an isotactic pentad fraction of 0.975 or more and an intrinsic viscosity �.eta.! of 1.00 to 1.10 dl/g as measured at 135.degree. C. in tetralin, (2) 3 to 10% by weight of at least two specific rubber components selected from the group consisting of (B) 1 to 9% by weight of an ethylene-butene-1 copolymer rubber, (C) 1 to 9% by weight of an ethylene-propylene copolymer rubber and (D) 1 to 9% by weight of an alkenyl aromatic compound-containing rubber; and (3) 10 to 12% by weight of talc having an average particle diameter of 4 .mu.m or less, and an injection molded article of the thermoplastic resin composition, said thermoplastic resin composition satisfying the impact strength and rigidity required as a material for an interior automotive trim and having a short molding cycle and good surface quality.
摘要翻译：一种热塑性树脂组合物，其熔体流动速率为25至30g / 10min，在23℃下的弯曲模量为20,000kg / cm 2或更高，并且其包含（1）78至87重量％的特定结晶聚丙烯[以下称为（A）]，其中丙烯均聚物部分的Q值为3.0〜5.0，全同立构五单元组分数为0.975以上，特性粘度η为1.00〜1.10dl / g，（2）3至10重量％的至少两种选自（B）1至9重量％的乙烯 - 丁烯-1共聚物橡胶的特定橡胶组分（C ）1〜9重量％的乙烯 - 丙烯共聚物橡胶和（D）1〜9重量％的含烯基芳香族化合物的橡胶; 和（3）10〜12重量％的平均粒径为4μm以下的滑石，以及热塑性树脂组合物的注射成型品，所述热塑性树脂组合物满足作为材料的材料所需的冲击强度和刚性内部汽车装饰件，具有短的成型周期和良好的表面质量。

2. 发明授权

US5723527A Thermoplastic resin composition and injection molded article thereof 失效
标题翻译：热塑性树脂组合物及其注塑制品
公开(公告)号：US5723527A
公开(公告)日：1998-03-03
申请号：US637279
申请日：1996-04-24
申请人： Hajime Sadatoshi , Kenichi Ohkawa , Teruhiko Doi , Yuichi Miyake , Takao Nomura , Takeyoshi Nishio
发明人： Hajime Sadatoshi , Kenichi Ohkawa , Teruhiko Doi , Yuichi Miyake , Takao Nomura , Takeyoshi Nishio
IPC分类号： B29C45/00 , B29K23/00 , B29K96/04 , C08J5/00 , C08K3/30 , C08K3/32 , C08K3/34 , C08K7/00 , C08K7/04 , C08L23/00 , C08L23/12 , C08L53/00
CPC分类号： C08L53/00
摘要： A thermoplastic resin composition which has a melt flow rate of 20 to 30 g/10 min and a flexural modulus at 23.degree. C. of 30,000 kg/cm.sup.2 or more and which comprises (A) 60 to 75% by weight of a specific crystalline polypropylene in which the propylene homopolymer portion has a Q value of 3.0 to 5.0, an isotactic pentad fraction of 0.975 or more and an intrinsic viscosity �.eta.! of 0.95 to 1.15 dl/g as measured at 135.degree. C. in tetralin, (B) 2 to 8% by weight of an ethylene-butene-1 copolymer rubber, (C) 2 to 8% by weight of an ethylene-propylene copolymer rubber, (D) 10 to 20% by weight of talc having an average particle diameter of 4 .mu.m or less, and (E) 5 to 20% by weight of fibrous magnesium oxysulfate, and an injection molded article of the thermoplastic resin composition, said thermoplastic resin composition satisfying the impact strength and rigidity required as a material for an instrumental panel and having a short molding cycle and good surface quality.
摘要翻译：一种热塑性树脂组合物，其熔体流动速率为20至30g / 10min，在23℃下的弯曲模量为30,000kg / cm 2或更高，并且其包含（A）60至75重量％的特定结晶其中丙烯均聚物部分的Q值为3.0-5.0，全同立构五单元组分数为0.975以上，特性粘度η为0.95-1.15dl / g，在135℃下在四氢化萘中测定，（B ）2〜8重量％的乙烯 - 丁烯-1共聚物橡胶，（C）2-8重量％的乙烯 - 丙烯共聚物橡胶，（D）10〜20重量％的平均粒径（E）5〜20重量％的纤维状氧硫酸镁，以及热塑性树脂组合物的注塑制品，所述热塑性树脂组合物满足作为器具材料所需的冲击强度和刚性具有短的成型周期和良好的表面质量。

3. 发明授权

US5852100A Thermoplastic resin composition 失效
标题翻译：热塑性树脂组合物
公开(公告)号：US5852100A
公开(公告)日：1998-12-22
申请号：US636220
申请日：1996-04-23
申请人： Hajime Sadatoshi , Haruyuki Suzuki , Yuichi Miyake , Takao Nomura , Takeyoshi Nishio
发明人： Hajime Sadatoshi , Haruyuki Suzuki , Yuichi Miyake , Takao Nomura , Takeyoshi Nishio
IPC分类号： C08K3/00 , C08L23/08 , C08L23/10 , C08L23/12 , C08L23/16 , C08L53/00
CPC分类号： C08L23/12 , C08K3/0033 , C08L23/16 , C08L53/00 , C08L2205/02 , C08L2205/035 , C08L2205/22 , C08L23/0815 , C08L2310/00 , C08L2312/00
摘要： A thermoplastic resin composition with improved low-temperature impact strength and rigidity against heat, comprising (I) 10-40% by weight of a mixture of (a) 10-50% by weight of a propylene homopolymer and/or an ethylene-propylene block copolymer (an isotactic pentad fraction of a propylene homopolymer portion being 0.98 or above) and (b) 50-90% by weight of an olefin-based copolymer rubber, said mixture having been dynamically heat treated in the presence of an organic peroxide and a crosslinking agent, (II) 20-85% by weight of a propylene homopolymer and/or an ethylene-propylene block copolymer (an isotactic pentad fraction of a propylene homopolymer portion being 0.98 or above and a melt index of the propylene homopolymer portion being 30-150 g/10 min), and (III) 5-40% by weight of an inorganic filler.
摘要翻译：具有改进的低温冲击强度和抗热刚性的热塑性树脂组合物，包含（I）10-40重量％的（a）10-50重量％的丙烯均聚物和/或乙烯 - 丙烯的混合物嵌段共聚物（丙烯均聚物部分的全同立构五单元组分数为0.98以上）和（b）50-90重量％的烯烃系共聚物橡胶，所述混合物在有机过氧化物的存在下动态热处理，交联剂（II）20-85重量％的丙烯均聚物和/或乙烯 - 丙烯嵌段共聚物（丙烯均聚物部分的全同立构五单元组分数为0.98或更高，丙烯均聚物部分的熔体指数为 30-150g / 10min）和（III）5-40重量％的无机填料。

4. 发明授权

US06441081B1 Polypropylene-base resin composition and products of injection molding thereof 有权
标题翻译：聚丙烯基树脂组合物及其注射成型品
公开(公告)号：US06441081B1
公开(公告)日：2002-08-27
申请号：US09555826
申请日：2000-07-11
申请人： Hajime Sadatoshi , Kenichi Ohkawa , Susumu Kanzaki , Hisayuki Iwai , Takao Nomura , Shoichi Ichikawa
发明人： Hajime Sadatoshi , Kenichi Ohkawa , Susumu Kanzaki , Hisayuki Iwai , Takao Nomura , Shoichi Ichikawa
IPC分类号： C08K334
CPC分类号： C08L23/12 , C08F297/083 , C08L23/0815 , C08L23/10 , C08L23/16 , C08L53/00 , C08L2666/04 , C08L2666/24 , C08L2666/02
摘要： A polypropylene resin composition which comprises: (1) 55 to 75% by weight of (A) a polypropylene resin consisting of a mixture of the following polymers (i) and (ii): (i) a propylene-ethylene block copolymer having a propylene homopolymer part which is the first segment and having a propylene-ethylene random copolymer part which is the second segment and (ii) a propylene homopolymer having an intrinsic viscosity [&eegr;]P of 0.8 to 1.8 dl/g as measured in tetralin at 135° C., (2) 21 to 30% by weight of (B) an ethylene-1-octene copolymer rubber having a melt flow rate (JIS-K-6758 at 190° C.) of 2 to 10 g/10 min and having a 1-octene component content of 20 to 25% by weight, and (3) 5 to 20% by weight of (C) talc having an average particle diameter of not more than 3 &mgr;m, wherein when the amount of the second segment contained in the propylene-ethylene block copolymer of the polypropylene resin (A) is designated as (A)′ and the ethylene-1-octene copolymer rubber content is designated as (B)′, the following expression is satisfied: 0.10≦{(A)′/[(A)′+(B)′]}≦0.30, and when the above composition is subjected to a tensile test according to ASTM D638, it exhibits, an ultimate elongation of at least 400%, and the melt flow rate (JIS-K-6758 at 230° C.) of the composition is at least 30 g/10 min, and an injection-molded article obtained by injection molding the above polypropylene resin composition.
摘要翻译：一种聚丙烯树脂组合物，其包含：（1）55至75重量％的（A）由以下聚合物（i）和（ii）的混合物组成的聚丙烯树脂：（i）丙烯 - 乙烯嵌段共聚物，其具有丙烯均聚物部分，其是第一链段并且具有作为第二链段的丙烯 - 乙烯无规共聚物部分和（ii）在135℃下在四氢化萘中测得的特性粘度ηP为0.8至1.8dl / g的丙烯均聚物（2）熔体流动速率（JIS-K-6758，190℃）的（B）乙烯-1-辛烯共聚物橡胶的21〜30重量％为2〜10g / 10分钟并且具有20至25重量％的1-辛烯组分含量，和（3）5至20重量％的（C）平均粒径不大于3μm的滑石，其中当第二包含在聚丙烯树脂（A）的丙烯 - 乙烯嵌段共聚物中的链段被称为（A）'，乙烯-1-辛烯共聚物橡胶含量指定为（B）'，满足以下表达式：当根据ASTM D638对上述组合物进行拉伸试验时，其表现出至少400％的极限伸长率和熔体流动速率（JIS-K-6758在230℃））为30g / 10分钟以上，注射成型上述聚丙烯树脂组合物得到的注射成型体。

5. 发明授权

US5621046A Polypropylene resin composition 失效
标题翻译：聚丙烯树脂组合物
公开(公告)号：US5621046A
公开(公告)日：1997-04-15
申请号：US499908
申请日：1995-07-11
申请人： Kunio Iwanami , Masatoshi Ohkura , Satoshi Ueki , Shigeyuki Toki , Takeyoshi Nishio , Takao Nomura
发明人： Kunio Iwanami , Masatoshi Ohkura , Satoshi Ueki , Shigeyuki Toki , Takeyoshi Nishio , Takao Nomura
IPC分类号： C08K7/14 , C08L23/08 , C08L23/12 , C08L23/16 , C08L53/00 , C08L23/00
CPC分类号： C08L23/12 , C08K7/14 , C08L2205/03 , C08L2205/035 , C08L23/0815 , C08L23/16 , C08L53/00
摘要： A polypropylene resin composition including (A) 50-90 parts by weight of a polypropylene resin including (a) 3-30 weight % of stereoblock polypropylene having a weight-average molecular weight of 5,000-1,000,000, a percentage of five continuous propylene monomer units in which all propylene bonds are meso bonds and a percentage of five continuous propylene monomer units in which all propylene bonds are racemic bonds being 70% or more and 5% or more, respectively relative to the all propylene bonds, and (b) 70-97 weight % of an ultra-high stereospecific polypropylene having a melt flow rate of 0.1-1,000 g/10 minutes, an average meso chain length Nm calculated from a triad percentage determined from .sup.13 C-NMR spectrum by the following formula of Nm=2[mm]/[mr]+1, wherein [mm] is (isotactic triad/total triad).times.100 (%) and [mr] is (heterotactic triad/total triad).times.100 (%), meeting a relation of Nm>250+29.5 log (MFR), and (B) 50-10 parts by weight of an olefinic rubber and/or a polyolefin other than (A).
摘要翻译：一种聚丙烯树脂组合物，其包含（A）50-90重量份的聚丙烯树脂，其包含（a）3-30重量％的重均分子量为5,000-1,000,000的立构嵌段聚丙烯，五个连续丙烯单体单元的百分比其中所有丙烯键均为内消旋键，其中所有丙烯键为外消旋键的五个连续丙烯单体单元的百分比相对于全部丙烯键分别为70％以上且5％以上，（b）70〜 97重量％的熔体流动速率为0.1-1,000g / 10分钟的超高立体定向聚丙烯，由根据13 C-NMR光谱由下式Nm / 2确定的三单元组百分比计算的平均内消旋链长度Nm： mm] / [mr] +1，其中[mm]为（全同立构三单元组/总三元组）×100（％），[mr]为（异质三单元组/总三元组）×100（％），满足Nm> 29.5log（MFR）和（B）50-10重量份的烯烃橡胶和/或其它聚烯烃比（A）。

6. 发明授权

US5374677A Thermoplastic polymer composition 失效
标题翻译：热塑性聚合物组成
公开(公告)号：US5374677A
公开(公告)日：1994-12-20
申请号：US901026
申请日：1992-06-19
申请人： Takeyoshi Nishio , Takao Nomura , Nobuya Kawamura , Hiroki Sato , Akihiko Uchikawa , Ikuo Tsutsumi , Yukitaka Goto
发明人： Takeyoshi Nishio , Takao Nomura , Nobuya Kawamura , Hiroki Sato , Akihiko Uchikawa , Ikuo Tsutsumi , Yukitaka Goto
IPC分类号： C08K3/34 , C08L23/00 , C08L23/08 , C08L23/10 , C08L23/16 , C08L53/00
CPC分类号： C08L23/16 , C08L23/0815 , C08L23/10 , C08L53/00
摘要： A thermoplastic polymer composition comprising: (i) 100 parts by weight of a thermoplastic polymer component which comprises an ethylene-propylene rubber, an ethylene copolymer and a propylene polymer (including an ethylene-propylene block copolymer), and (ii) 0 to 7 parts by weight of talc, the thermoplastic polymer component being composed of, according to fractionation using o-dichlorobenzene as a solvent, component (A) which is a component soluble in the solvent at 40.degree. C., component (B) which is a component insoluble in the solvent at 40.degree. C. but soluble at 110.degree. C., and component (C) which is a component insoluble in the solvent even at 110.degree. C. in such a proportion that the total amount of the components (A) and (B) is from 50 to 70 parts by weight, the weight ratio of the component (A) to the component (B) being from 0.5 to 1.5, and the amount of the component (C) is from 50 to 30 parts by weight.
摘要翻译：一种热塑性聚合物组合物，其包含：（i）100重量份的包含乙丙橡胶，乙烯共聚物和丙烯聚合物（包括乙烯 - 丙烯嵌段共聚物）的热塑性聚合物组分，和（ii）0至7 滑石的重量份，热塑性聚合物组分由根据使用邻二氯苯作为溶剂的分级组成，组分（A）是在40℃下可溶于溶剂的组分，组分（B）为组分不溶于40℃但可溶于110℃的组分（C），即使在110℃下不溶于溶剂的组分（C），组分（A ）和（B）为50〜70重量份，成分（A）与成分（B）的重量比为0.5〜1.5，成分（C）的含量为50〜30重量份重量。

7. 发明授权

US5091462A Thermoplastic resin composition 失效
公开(公告)号：US5091462A
公开(公告)日：1992-02-25
申请号：US493459
申请日：1990-03-14
申请人： Osamu Fukui , Kiyoshi Tsutsui , Tomohiko Akagawa , Ikunori Sakai , Takao Nomura , Takeyoshi Nishio , Toshio Yokoi , Nobuya Kawamura
发明人： Osamu Fukui , Kiyoshi Tsutsui , Tomohiko Akagawa , Ikunori Sakai , Takao Nomura , Takeyoshi Nishio , Toshio Yokoi , Nobuya Kawamura
IPC分类号： C08K3/34 , C08L51/00 , C08L51/06 , C08L53/00 , C08L53/02 , C08L77/00
CPC分类号： C08L51/006 , C08K3/346 , C08L51/06 , C08L53/005 , C08L53/025 , C08L77/00
摘要： A polypropylene thermoplastic resin composition comprising (a) a modified crystalline polypropylene of a crystalline polypropylene comprising said modified crystalline polypropylene and (b) a modified polyamide obtained by partially or wholly grafting a polyamide with a clay mineral. A polypropylene thermoplastic resin composition comprising, in addition to the above polypropylene thermoplastic resin composition comprising the components (a) and (b), one or any combination of the following components (c), (d) and (e): (c) an ethylene-.alpha.-olefin copolymer rubber or a modified ethylene-.alpha.-olefin copolymer rubber, (d) a block copolymer between a monovinyl-substituted aromatic hydrocarbon and a conjugated diene, a hydrogenation product of said block copolymer, or a modification product of said block copolymer, and (e) an inorganic filler. The modified polyamide as the component (b), obtained by modifying a polyamide with a clay mineral has good compatibility with or good dispersibility in the component (a), i.e. the modified crystalline polypropylene or the crystalline polypropylene comprising the modified crystalline polypropylene. Therefore, the polypropylene thermoplastic resin composition comprising these components (a) and (b) has excellent heat resistance and excellent impact resistance.

8. 发明授权

US5883174A Polypropylene resin composition 失效
标题翻译：聚丙烯树脂组合物
公开(公告)号：US5883174A
公开(公告)日：1999-03-16
申请号：US680971
申请日：1996-07-16
申请人： Tomohiko Akagawa , Ikunori Sakai , Saburo Hinenoya , Yasuo Kita , Kaoru Inoue , Takeyoshi Nishio , Takao Nomura
发明人： Tomohiko Akagawa , Ikunori Sakai , Saburo Hinenoya , Yasuo Kita , Kaoru Inoue , Takeyoshi Nishio , Takao Nomura
IPC分类号： C08K3/34 , C08L23/16 , C08L53/00 , C08J5/10 , C08L23/12
CPC分类号： C08L53/00
摘要： A polypropylene resin composition having excellent rigidity, impact resistance and formability (moldability) and thus useful for the interior parts of automobile, includes (A) a crystalline E/P block copolymer containing a fraction Ac soluble in p-xylene at room temperature and having an ethylene content of 18 to 22%; (B) a crystalline E/P block copolymer containing a fraction Bc soluble in p-xylene at room temperature and having an ethylene content of 27 to 40% and (C) talc particles having an average size of 3 to 5 .mu.m and largest size less than 20 .mu.m, in which composition, (a) the p-xylene-soluble fractions Ac and Bc are in contents As and Bs based on the total weight of the copolymers (A) and (B) and satisfying As+Bs=7 to 17% by weight and As/(A +Bs)=0.1 to 0.6; (b) an isotactic pentad fraction of propylene in each of copolymers (A) and (B) is 96% or more, and the mixture of the copolymers (A) and (B) has a MFR of 20 to 35 g/10 min at 230.degree. C. under 2160 g load; and (c) the copolymers (A) and (B) are in a total weight content of 50 to 95% and talc (C) is in a weight content of 5 to 50%.
摘要翻译：具有优异的刚性，耐冲击性和成型性（成型性），因此可用于汽车内部的聚丙烯树脂组合物包括（A）在室温下含有可溶于对二甲苯的馏分Ac的结晶E / P嵌段共聚物，并具有乙烯含量为18〜22％; （B）在室温下含有可溶于对二甲苯的馏分Bc，乙烯含量为27〜40％的结晶性E / P嵌段共聚物，（C）平均粒径为3〜5μm的滑石粉末和最大（a）对二甲苯可溶级分Ac和Bc的含量为A，Bs为基于共聚物（A）和（B）的总重量，满足As + Bs = 7〜17重量％，As /（A + Bs）= 0.1〜0.6; （b）共聚物（A）和（B）中的丙烯的全同立构五单元组分率为96％以上，共聚物（A）和（B）的混合物的MFR为20〜35g / 10分钟在230℃，2160g负荷下; 和（c）共聚物（A）和（B）的总重量含量为50-95％，滑石（C）的重量含量为5-50％。

9. 发明授权

US5856400A Polypropylene resin composition 失效
标题翻译：聚丙烯树脂组合物
公开(公告)号：US5856400A
公开(公告)日：1999-01-05
申请号：US705215
申请日：1996-08-29
申请人： Takenobu Matsumura , Masahiro Naiki , Takao Nomura , Takeyoshi Nishio
发明人： Takenobu Matsumura , Masahiro Naiki , Takao Nomura , Takeyoshi Nishio
IPC分类号： C08K3/00 , C08L23/00 , C08L23/04 , C08L23/10 , C08L23/16 , C08L53/00 , C08K3/34
CPC分类号： C08L23/10 , C08L53/00 , C08L23/16
摘要： A polypropylene resin composition comprising an isotactic polypropylene component, a rubber component, and an inorganic filler component, wherein (a) the melt flow rate, according to ASTM D1238, is 20 g/10 min or more, (b) the flexural modulus, according to ASTM D790, is 2300 MPa or more, (c) the Izod impact strength, according to ASTM D256, is 180 J/m or more at 23.degree. C. and 45 J/m or more at -30.degree. C., (d) the heat deformation temperature, according to ASTM D648, is 130.degree. C. or more, and (e) there is a diffraction peak unique to polypropylene of space group P21/c in the diffraction pattern measured by the wide angle X-ray diffraction method in an injection molded article of the composition formed under a quenching condition.
摘要翻译：包含全同立构聚丙烯组分，橡胶组分和无机填料组分的聚丙烯树脂组合物，其中（a）根据ASTM D1238的熔体流动速率为20g / 10min以上，（b）挠曲模量，根据ASTM D790，为2300MPa以上，（c）根据ASTM D256，Izod冲击强度在23℃为180J / m以上，-30℃为45J / m以上，（d）根据ASTM D648的热变形温度为130℃以上，（e）在广角X射线衍射测定的衍射图中，存在空间群P21 / c的聚丙烯特有的衍射峰，在淬火条件下形成的组合物的注塑制品中的X-射线衍射法。

10. 发明授权

US5461105A Resin composition having excellent paint coatability 失效
公开(公告)号：US5461105A
公开(公告)日：1995-10-24
申请号：US415566
申请日：1995-04-03
申请人： Yoshiharu Saito , Masao Sakaizawa , Kunio Iwanami , Kitsusho Kitano , Michihisa Tasaka , Kenji Kawazu , Shizuo Miyazaki , Takao Nomura , Takeyoshi Nishio , Hisayuki Iwai
发明人： Yoshiharu Saito , Masao Sakaizawa , Kunio Iwanami , Kitsusho Kitano , Michihisa Tasaka , Kenji Kawazu , Shizuo Miyazaki , Takao Nomura , Takeyoshi Nishio , Hisayuki Iwai
IPC分类号： C08K3/00 , C08L23/16 , C08L53/00
CPC分类号： C08K3/0033 , C08L23/16 , C08L53/00
摘要： A resin composition having excellent paint coatability containing (a) 50-80 weight % of a multi-stage polymerized propylene-ethylene block copolymer consisting essentially of (i) a propylene homopolymer portion, (ii) a propylene-ethylene random copolymer portion, and (iii) an ethylene homopolymer portion, (b) 20-40 weight % of an ethylene-.alpha.-olefin copolymer elastomer, and (c) 20 weight % or less of an inorganic filler, components in the components (a) and (b), which are soluble in p-xylene at a room temperature, having a number-average molecular weight of 4.times.10.sup.4 or more and a weight-average molecular weight of 20.times.10.sup.4 or more.

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