公开(公告)号：EP1217015A1

公开(公告)日：2002-06-26

申请号：EP00951912.5

申请日：2000-08-09

申请人： Mitsui Chemicals, Inc.

发明人： MURAKAMI, Hidetatsu, Mitsui Chemicals, Inc. ,  OKADA, Keiji, Mitsui Chemicals, Inc. ,  KAWASAKI, Masaaki, Mitsui Chemicals, Inc. ,  ICHINO, Kotaro, Mitsui Chemicals, Inc.

IPC分类号： C08F210/02 ,  C08L23/08 ,  B60C1/00

CPC分类号： C08L21/00 ,  B60C1/0016 ,  C08F210/02 ,  C08F210/18 ,  C08L23/08 ,  C08L23/0823 ,  Y10T152/10495 ,  C08L2666/06 ,  C08L2666/04 ,  C08F236/20 ,  C08F2500/25 ,  C08F2500/17 ,  C08F210/06

摘要： A tire provided with a tire tread made from a rubber composition comprising

(A) a random copolymer based on non-conjugated cyclic polyene comprising structural units originated from one or more α -olefins (A1) and originated from one or more non-conjugated cyclic polyene (A2), the said random copolymer having a content of the structural unit(s) originated from one or more α -olefins (A1) in the range of 93 to 70 mole %; a content of the structural unit originated from one or more non-conjugated cyclic polyene (A2) in the range of 7 to 30 mole %; an intrinsic viscosity [ η ] , determined in decalin at 135 °C, in the range of 0.01 to 20 dl/g; a glass transition temperature (Tg) of not higher than 40 °C; and an iodine value in the range of 50 to 150, and
(B) a rubber based on diene,
in a weight proportion of {the random copolymer based on non-conjugated cyclic polyene (A)} versus {the rubber based on diene (B)} in the range from 60/40 to 0.1/99.9 exhibits a superior braking performance and, compatible therewith, a superior driving fuel cost aspect.

摘要翻译： 一种具有由橡胶组合物制成的轮胎胎面的轮胎，所述橡胶组合物包含（A）基于非共轭环状多烯的无规共聚物，所述无规共聚物包含源自一种或多种α-烯烃（A1）的结构单元并源自一种或多种非共轭环状 所述无规共聚物的结构单元的含量为93〜70摩尔％的范围内的一种以上的α-烯烃（A1）; 所述结构单元的含量为7至30摩尔％范围内的一种或多种非共轭环状多烯（A2）; 在135℃十氢化萘中测定的特性粘度[η]为0.01-20dl / g; 玻璃化转变温度（Tg）不高于40℃; （B）基于二烯的橡胶以{基于非共轭环状多烯（A）的无规共聚物}与{基于二烯的橡胶（基于非共轭环状多烯 B）}在60/40至0.1 / 99.9的范围内表现出优越的制动性能并且与之相容，具有优越的驾驶燃料成本方面。

公开(公告)号：EP0957147A1

公开(公告)日：1999-11-17

申请号：EP98900677.0

申请日：1998-01-21

申请人： Mitsui Chemicals, Inc.

发明人： MORIZONO, Kenichi, Mitsui Chemicals, Inc. ,  OKADA, Keiji, Mitsui Chemicals, Inc. ,  TOKITA, Suguru, Mitsui Chemicals, Inc.

IPC分类号： C09J123/00 ,  C09J201/00 ,  C09J109/06 ,  C09J153/02 ,  C09J125/00

CPC分类号： C09J153/025 ,  C08L23/06 ,  C08L23/0838 ,  C08L53/02 ,  C08L91/06 ,  C08L2666/02 ,  C08L2666/04 ,  C08L2666/24 ,  C08L2666/28 ,  C09J109/06 ,  C09J123/0838 ,  C09J125/02 ,  C09J125/08 ,  C09J151/06 ,  C09J153/00 ,  C09J153/005 ,  C09J153/02 ,  Y10S526/935

摘要： A hot-melt adhesive composition comprises 100 parts by weight of a tackifier (B), and 1 to 900 parts by weight of an α-olefin/aromatic vinyl compound random copolymer (C). A hot-melt adhesive composition comprises 100 parts by weight of a base polymer (A), 1 to 900 parts by weight of component (B), and 1 to 1,000 parts by weight of component (C). A hot-melt adhesive composition comprises 100 parts by weight of component (A), 10 to 300 parts by weight of component (B), and 10 to 400 parts by weight of component (C). The component (A) is preferably at least one polymer selected from the group consisting of a polyolefin (a-1), a polar group containing polymer (a-2) and an aromatic vinyl compound/conjugated diene copolymer (a-3).
These hot-melt adhesive compositions exhibit excellent adhesive strength and can be used as an adhesive for styrene resins.

摘要翻译： 热熔粘合剂组合物包含100重量份的增粘剂（B）和1至900重量份的α-烯烃/芳族乙烯基化合物无规共聚物（C）。 热熔粘合剂组合物包含100重量份的基础聚合物（A），1至900重量份的组分（B）和1至1,000重量份的组分（C）。 热熔粘合剂组合物包含100重量份组分（A），10-300重量份组分（B）和10-400重量份组分（C）。 组分（A）优选为选自聚烯烃（a-1），含极性基团的聚合物（a-2）和芳族乙烯基化合物/共轭二烯共聚物（a-3）中的至少一种聚合物。 这些热熔粘合剂组合物表现出优异的粘合强度，并且可以用作苯乙烯树脂的粘合剂。

公开(公告)号：EP0889091A1

公开(公告)日：1999-01-07

申请号：EP98900681.2

申请日：1998-01-21

申请人： Mitsui Chemicals, Inc.

发明人： OKADA, Keiji, Mitsui Chemicals, Inc. ,  MORIZONO, Kenichi, Mitsui Chemicals, Inc. ,  TAKIMOTO, Kazuyuki, Mitsui Chemicals, Inc. ,  MATSUMOTO, Tetsuhiro, Mitsui Chemicals, Inc. ,  KAWASAKI, Masaaki ,  TOJO, Tetsuo

IPC分类号： C08L23/18 ,  C08L9/00 ,  B60C1/00

CPC分类号： C08L21/00 ,  B60C1/0016 ,  B60C1/0025 ,  C08L23/0838 ,  C08L23/16 ,  Y02T10/862 ,  Y10T152/10495 ,  C08L2666/06 ,  C08L2666/04

摘要： The rubber composition for tire side wall of the invention provides a rubber material for tire side wall, which has excellent strength properties and bending fatigue resistance and can afford a tire side wall of low fuel consumption. The rubber composition comprises an unsaturated olefin copolymer (A) obtained from ethylene (i), an aromatic vinyl compound (ii), a non-conjugated polyene (iii) and, if necessary, an α-olefin having at least 3 carbon atoms (iv), wherein [(i)/(iv)](molar ratio of constituent units) is from 100/0 to 40/60, [ ((i)+(iv))/(ii) ](molar ratio of constituent units) is from 98/2 to 60/40, an intrinsic viscosity [η] measured in decalin at 135°C is from 1.0 to 6.0 dl/g, and an iodine value is from 10 to 50; and a diene rubber (B).
The rubber composition for tire tread of the invention provides a rubber material for tire tread, which is superior in strength properties, abrasion resistance and braking performance on the wet road (wet skid) and attains small rolling resistance, said rubber composition comprising an unsaturated olefin copolymer (A') obtained from ethylene (i), an aromatic vinyl compound (ii), a non-conjugated polyene (iii) and an α-olefin having at least 3 carbon atoms (iv), wherein [(i)/(iv)](molar ratio of constituent units) is from 100/0 to 40/60 and [ ((i)+(iv))/(ii) ](molar ratio of constituent units) is from 99/1 to 85/15; and a diene rubber (B) wherein a weight ratio [(A')/(B)] of the unsaturated olefin copolymer (A') to the diene rubber (B) is from 1/99 to 50/50.

摘要翻译： 本发明的用于轮胎侧壁的橡胶组合物提供了用于轮胎侧壁的橡胶材料，其具有优异的强度性能和抗弯曲疲劳性并且能够提供低燃料消耗的轮胎侧壁。 该橡胶组合物包含由乙烯（i），芳香族乙烯基化合物（ii），非共轭多烯（iii）以及根据需要具有至少3个碳原子的α-烯烃得到的不饱和烯烃共聚物（A） 其中[（i）/（iv）]（构成单元的摩尔比）为100/0至40/60，[（（i）+（iv））/（ii）] 单元）为98/2〜60/40，在135℃萘烷中测定的特性粘度[η]为1.0〜6.0dl / g，碘值为10〜50。 和二烯橡胶（B）。 本发明的用于轮胎胎面的橡胶组合物提供一种用于轮胎胎面的橡胶材料，其在湿路面（湿滑道）上的强度性能，耐磨性和制动性能优异并且获得小的滚动阻力，所述橡胶组合物包含不饱和烯烃 （ⅰ），芳族乙烯基化合物（ⅱ），非共轭多烯（ⅲ）和具有至少3个碳原子的α-烯烃（iv）获得的共聚物（A'），其中[（ⅰ）/ （构成单元的摩尔比）为100/0〜40/60，[（（i）+（iv））/（ii）]为99/1〜85 / 15; 和二烯橡胶（B），其中不饱和烯烃共聚物（A'）与二烯橡胶（B）的重量比[（A'）/（B）]为1/99至50/50。

公开(公告)号：EP1217015B1

公开(公告)日：2005-12-07

申请号：EP00951912.5

申请日：2000-08-09

申请人： Mitsui Chemicals, Inc.

发明人： MURAKAMI, Hidetatsu, Mitsui Chemicals, Inc. ,  OKADA, Keiji, Mitsui Chemicals, Inc. ,  KAWASAKI, Masaaki, Mitsui Chemicals, Inc. ,  ICHINO, Kotaro, Mitsui Chemicals, Inc.

IPC分类号： C08F210/02 ,  C08L23/08 ,  B60C1/00

CPC分类号： C08L21/00 ,  B60C1/0016 ,  C08F210/02 ,  C08F210/18 ,  C08L23/08 ,  C08L23/0823 ,  Y10T152/10495 ,  C08L2666/06 ,  C08L2666/04 ,  C08F236/20 ,  C08F2500/25 ,  C08F2500/17 ,  C08F210/06

公开(公告)号：EP0957147B1

公开(公告)日：2004-03-31

申请号：EP98900677.0

申请日：1998-01-21

申请人： Mitsui Chemicals, Inc.

发明人： MORIZONO, Kenichi, Mitsui Chemicals, Inc. ,  OKADA, Keiji, Mitsui Chemicals, Inc. ,  TOKITA, Suguru, Mitsui Chemicals, Inc.

IPC分类号： C09J123/00 ,  C09J201/00 ,  C09J109/06 ,  C09J153/02 ,  C09J125/00

CPC分类号： C09J153/025 ,  C08L23/06 ,  C08L23/0838 ,  C08L53/02 ,  C08L91/06 ,  C08L2666/02 ,  C08L2666/04 ,  C08L2666/24 ,  C08L2666/28 ,  C09J109/06 ,  C09J123/0838 ,  C09J125/02 ,  C09J125/08 ,  C09J151/06 ,  C09J153/00 ,  C09J153/005 ,  C09J153/02 ,  Y10S526/935

摘要： A hot-melt adhesive composition comprises 100 parts by weight of a tackifier (B), and 1 to 900 parts by weight of an alpha -olefin/aromatic vinyl compound random copolymer (C). A hot-melt adhesive composition comprises 100 parts by weight of a base polymer (A), 1 to 900 parts by weight of component (B), and 1 to 1,000 parts by weight of component (C). A hot-melt adhesive composition comprises 100 parts by weight of component (A), 10 to 300 parts by weight of component (B), and 10 to 400 parts by weight of component (C). The component (A) is preferably at least one polymer selected from the group consisting of a polyolefin (a-1), a polar group containing polymer (a-2) and an aromatic vinyl compound/conjugated diene copolymer (a-3). These hot-melt adhesive compositions exhibit excellent adhesive strength and can be used as an adhesive for styrene resins.

公开(公告)号：EP1178102B1

公开(公告)日：2017-08-02

申请号：EP00911416.6

申请日：2000-03-28

申请人： Mitsui Chemicals, Inc. ,  The Lubrizol Corporation

发明人： OKADA, Keiji, Mitsui Chemicals, Inc. ,  KANESHIGE, Ryousuke

IPC分类号： C10M143/02 ,  C08F210/16

CPC分类号： C10M143/02 ,  C08F210/16 ,  C10M143/00 ,  C10M2205/00 ,  C10M2205/02 ,  C10M2205/022 ,  C10M2205/04 ,  C10M2209/084 ,  C10M2209/086 ,  C10N2220/02 ,  C10N2230/02 ,  C08F2500/03 ,  C10M2205/024

摘要： The lubricating oil composition of the invention comprises a lubricating oil base (A) and a copolymer (B) of ethylene and an alpha -olefin of 3 to 20 carbon atoms. The copolymer (B) of ethylene and an alpha -olefin of 3 to 20 carbon atoms is contained in the composition in an amount of 1 to 20 % by weight and has the following properties: (1) the ethylene content (E) is in the range of 40 to 77 % by weight, (2) the weight-average molecular weight (Mw) in terms of polystyrene, as measured by GPC, is in the range of 80,000 to 400,000, (3) Mw/Mn is not more than 2.4, (4) the melting point (Tm), as measured by DSC, is not higher than 60 DEG C, (5) the ethylene content (E, % by weight) and the melting point (Tm, DEG C), as measured by DSC, satisfy the following relation (I): 3.31xE-186 ≥ Tm and (6) the proportion (V, %) of alpha beta carbon atoms to all carbon atoms in the main chain, and if present, the long-chain branches, and the ethylene content (E, % by weight) satisfy the following relation: V ≤ 10-0.1xE

摘要翻译： 本发明的润滑油组合物包含润滑油基质（A）和乙烯与具有3至20个碳原子的α-烯烃的共聚物（B）。 乙烯与碳原子数3〜20的α-烯烃的共聚物（B）的含量为1〜20重量％，具有以下性质：（1）乙烯含量（E）为 （2）通过GPC测定的以聚苯乙烯换算的重均分子量（Mw）为80,000〜400,000的范围，（3）Mw / Mn不超过40〜77重量％ （4）由DSC测得的熔点（Tm）不高于60℃，（5）乙烯含量（E，重量％）和熔点（Tm，℃）， （I）：3.31×E-186≥Tm和（6）αβ碳原子相对于主链中所有碳原子的比例（V，％），并且如果存在，则长 链分支，并且乙烯含量（E，重量％）满足以下关系：V≤10-0.1×E

公开(公告)号：EP0902081A1

公开(公告)日：1999-03-17

申请号：EP98900678.8

申请日：1998-01-21

申请人： Mitsui Chemicals, Inc.

发明人： KANESHIGE, Ryousuke, Mitsui Chemicals, Inc. ,  HIRANO, Hideki, Mitsui Chemicals, Inc. ,  TANAKA, Masahide, Mitsui Chemicals, Inc. ,  MORIZONO, Kenichi, Mitsui Chemicals, Inc. ,  OKADA, Keiji, Mitsui Chemicals, Inc.

IPC分类号： C10M107/12 ,  C10M143/10 ,  C10L1/16

CPC分类号： C10L10/08 ,  C08L23/0815 ,  C08L91/00 ,  C10L1/165 ,  C10M107/02 ,  C10M107/12 ,  C10M143/00 ,  C10M143/10 ,  C10M2205/00 ,  C10M2205/02 ,  C10M2205/0206 ,  C10M2205/04 ,  C10M2205/043 ,  C08L2666/02

摘要： The lubricating oil of the invention comprises an α-olefin/aromatic vinyl compound random copolymer comprising constituent units derived from ethylene, constituent units derived from an aromatic vinyl compound and optionally constituent units derived from an α-olefin of 3 to 20 carbon atoms in specific proportions and having an intrinsic viscosity, as measured in decalin at 135 °C, of 0.01 to 0.50 dl/g. The lubricating oil is excellent in compatibility with lubricating oil additives as well as in viscosity properties, heat stability, oxidation stability and abrasion resistance.
The lubricating oil composition of the invention comprises an α-olefin/aromatic vinyl compound random copolymer and a base oil. The random copolymer comprises the same constituent units as in the above-mentioned random copolymer in specific proportions and has an intrinsic viscosity, as measured in decalin at 135 °C, of 0.1 to 5.0 dl/g, and the base oil comprises a mineral oil and/or a hydrocarbon synthetic oil. The lubricating oil composition has excellent lubricating oil properties.
The fuel oil composition of the invention comprises an α-olefin/aromatic vinyl type fuel oil fluidity improver and a middle fraction fuel oil having a boiling point of 150 to 400 °C. The fuel oil fluidity improver comprises an α-olefin/aromatic vinyl compound random copolymer comprising the same constituent units as in the above-mentioned random copolymer in specific proportions and having an intrinsic viscosity, as measured in decalin at 135 °C, of 0.01 to 1.0 dl/g. The fuel oil composition is prevented from viscosity increase of the middle fraction fuel oil and is lowered in the cold filter plugging point and the pour point. Besides, the fuel oil composition contributes to inhibition of abrasion of fuel injection nozzles.

公开(公告)号：EP0893245A1

公开(公告)日：1999-01-27

申请号：EP98900680.4

申请日：1998-01-21

申请人： Mitsui Chemicals, Inc.

发明人： KAWASAKI, Masaaki ,  TOJO, Tetsuo ,  OKADA, Keiji, Mitsui Chemicals, Inc. ,  MORIZONO, Kenichi, Mitsui Chemicals, Inc. ,  TAKIMOTO, Kazuyuki, Mitsui Chemicals, Inc.

IPC分类号： B32B25/14 ,  B32B27/28 ,  C08J7/04

CPC分类号： C08F210/02 ,  C08F4/65912 ,  C08F210/18 ,  C08J7/042 ,  C08J2323/02 ,  C08J2433/00 ,  C08J2467/02 ,  C08J2475/04 ,  C08F4/6592 ,  C08F212/08 ,  C08F2500/17 ,  C08F236/20 ,  C08F210/14 ,  C08F210/08 ,  C08F210/06

摘要： Disclosed is a vulcanized molded product having a surface decorative layer, comprising a vulcanized product of an unsaturated olefin copolymer (A) and a decorative layer provided on a surface of the vulcanized product, or comprising a vulcanized product of an olefin elastomer composition and a decorative layer provided on a surface of the vulcanized product, said olefin elastomer composition comprising an unsaturated olefin copolymer (A) and an ethylene/α-olefin copolymer rubber (E). The unsaturated olefin copolymer (A) is obtained from (i) ethylene, (ii) an aromatic vinyl compound, (iii) a non-conjugated polyene, and optionally, (iv) an α-olefin of 3 to 20 carbon atoms. Since the vulcanized molded product having a surface layer has excellent adhesion properties between the molded product and the surface decorative layer and shows excellent mechanical strength, it can be widely used for automotive industrial parts and building materials. Also disclosed is a coated molded product of a thermoplastic resin composition, comprising a molded product of a thermoplastic resin composition and a coating film formed on the molded product, said thermoplastic resin composition comprising an ethylene/aromatic vinyl compound random copolymer and another thermoplastic resin. Further disclosed is a coated molded product of an elastomer composition, comprising a molded product of an elastomer composition and a coating film formed on the molded product, said elastomer composition comprising an ethylene/aromatic vinyl compound random copolymer and an elastomer. Since the coated molded products have excellent adhesion properties between the molded product and the coating film, they can be widely used for industrial materials and medical appliances which need to have coating films.

摘要翻译： 本发明公开了具有表面装饰层的硫化模塑制品，包含不饱和烯烃共聚物（A）和设置在硫化产品的表面上，或包含烯烃弹性体组合物和装饰的硫化产品上形成的装饰层的硫化产品 提供的硫化产品的表面上层，所述烯烃弹性体组合物包含不饱和烯烃共聚物（A）和乙烯/α-烯烃共聚物橡胶（E）的。 不饱和烯烃共聚物（A）选自（i）乙烯，（ⅱ）芳族乙烯基化合物，（ⅲ）非共轭多烯，和任选地获得，（ⅳ），以3至20个碳原子的α-烯烃。 由于具有表面层的硫化模塑产品具有模制产品和所述表面装饰层之间优异的粘附性质并且显示出优异的机械强度，因此可广泛用于汽车工业零部件和建筑材料。 所以盘游离缺失是一种热塑性树脂组合物的涂覆模塑制品，其包含热塑性树脂组合物的模塑产品和涂膜形成在所述模制产品，所述热塑性树脂组合物包含乙烯/芳族乙烯基化合物无规共聚物和另一种热塑性树脂的。 在模制产品进一步游离缺失盘是一种弹性体组合物的涂布模塑制品，包含弹性体组合物的模塑产品和涂膜形成，所述弹性体组合物包含乙烯/芳族乙烯基化合物无规共聚物和弹性体来。 由于涂覆模塑产品具有模制产品和所述涂层之间电影优异的粘附性能，可广泛用于工业材料及医疗用具这就需要有涂膜。

公开(公告)号：EP1746113A1

公开(公告)日：2007-01-24

申请号：EP05728556.1

申请日：2005-04-11

申请人： Mitsui Chemicals, Inc.

发明人： MURAKAMI, Hidetatsu, Mitsui Chemicals, Inc. ,  OKADA, Keiji, Mitsui Chemicals, Inc. ,  ICHINO, Kotaro, Mitsui Chemicals, Inc. ,  KAWASAKI, Masaaki, Mitsui Chemicals, Inc. ,  EBATA, Hiroki, Mitsui Chemicals, Inc. ,  HASADA, Yasuhiro, Mitsui Chemicals, Inc. ,  IKENAGA, Shigenobu, Mitsui Chemicals, Inc.

IPC分类号： C08F210/00 ,  C08F236/20 ,  C08L9/00 ,  C08L23/02

CPC分类号： C08F210/18 ,  B60C1/0016 ,  C08F236/20 ,  C08L21/00 ,  C08L23/145 ,  C08L23/16 ,  C08L2666/06 ,  C08F210/06 ,  C08F2500/25 ,  C08F2500/17

摘要： Disclosed are a nonconjugated polyene copolymer comprising a random copolymer having structural units derived from α-olefin (A1) of 2 to 20 carbon atoms and structural units derived from nonconjyugated polyene (A2), said nonconjugated polyene copolymer having a glass transition temerature (Tg) of -25 to 20 °C and Mooney viscosity of [ML(1+4)100°C] of 5 to 190;a rubber composition comprising the nonconjugated polyene copolymer and a diene-based rubber (B); a modifier for tires comprising the copolymer; a rubber material for tires comprising the rubber composition; a tire tread obtained from the rubber material for tires; and a tire having the tire tread.

摘要翻译： 公开了一种非共轭多烯共聚物，其包含具有衍生自2-20个碳原子的α-烯烃（A1）的结构单元和来自非共轭多烯（A2）的结构单元的无规共聚物，所述非共轭多烯共聚物具有玻璃化转变温度（Tg） 为-25〜20℃，[ML（1 + 4）100℃]的门尼粘度为5〜190;包含非共轭多烯共聚物和二烯系橡胶（B）的橡胶组合物; 用于包含所述共聚物的轮胎的改性剂; 一种用于轮胎的橡胶材料，包括橡胶组合物; 从轮胎用橡胶材料获得的轮胎胎面; 以及具有轮胎胎面的轮胎。

公开(公告)号：EP0902081B1

公开(公告)日：2003-12-03

申请号：EP98900678.8

申请日：1998-01-21

申请人： Mitsui Chemicals, Inc.

发明人： KANESHIGE, Ryousuke, Mitsui Chemicals, Inc. ,  HIRANO, Hideki, Mitsui Chemicals, Inc. ,  TANAKA, Masahide, Mitsui Chemicals, Inc. ,  MORIZONO, Kenichi, Mitsui Chemicals, Inc. ,  OKADA, Keiji, Mitsui Chemicals, Inc.

IPC分类号： C10M107/12 ,  C10M143/00 ,  C10L1/16

CPC分类号： C10L10/08 ,  C08L23/0815 ,  C08L91/00 ,  C10L1/165 ,  C10M107/02 ,  C10M107/12 ,  C10M143/00 ,  C10M143/10 ,  C10M2205/00 ,  C10M2205/02 ,  C10M2205/0206 ,  C10M2205/04 ,  C10M2205/043 ,  C08L2666/02

摘要： The lubricating oil of the invention comprises an alpha -olefin/aromatic vinyl compound random copolymer comprising constituent units derived from ethylene, constituent units derived from an aromatic vinyl compound and optionally constituent units derived from an alpha -olefin of 3 to 20 carbon atoms in specific proportions and having an intrinsic viscosity, as measured in decalin at 135 DEG C, of 0.01 to 0.50 dl/g. The lubricating oil is excellent in compatibility with lubricating oil additives as well as in viscosity properties, heat stability, oxidation stability and abrasion resistance. The lubricating oil composition of the invention comprises an alpha -olefin/aromatic vinyl compound random copolymer and a base oil. The random copolymer comprises the same constituent units as in the above-mentioned random copolymer in specific proportions and has an intrinsic viscosity, as measured in decalin at 135 DEG C, of 0.1 to 5.0 dl/g, and the base oil comprises a mineral oil and/or a hydrocarbon synthetic oil. The lubricating oil composition has excellent lubricating oil properties. The fuel oil composition of the invention comprises an alpha -olefin/aromatic vinyl type fuel oil fluidity improver and a middle fraction fuel oil having a boiling point of 150 to 400 DEG C. The fuel oil fluidity improver comprises an alpha -olefin/aromatic vinyl compound random copolymer comprising the same constituent units as in the above-mentioned random copolymer in specific proportions and having an intrinsic viscosity, as measured in decalin at 135 DEG C, of 0.01 to 1.0 dl/g. The fuel oil composition is prevented from viscosity increase of the middle fraction fuel oil and is lowered in the cold filter plugging point and the pour point. Besides, the fuel oil composition contributes to inhibition of abrasion of fuel injection nozzles.