公开(公告)号：EP2868697A4

公开(公告)日：2016-03-09

申请号：EP13823429

申请日：2013-07-24

Applicant: SUMITOMO RUBBER IND

Inventor： KOJIMA RYOJI ,  YOKOYAMA YUKA

IPC: C08L9/06 ,  B60C1/00 ,  C08F36/06 ,  C08F136/06 ,  C08F236/06 ,  C12P5/00 ,  C12P5/02 ,  C12P7/16

CPC classification number: C08F136/06 ,  B60C1/00 ,  C08F236/06 ,  C08L9/00 ,  C08L2205/02 ,  C08L2205/025 ,  C12P5/02 ,  C12P5/026 ,  C12P7/16 ,  Y02E50/10

Abstract: The present invention provides rubber compositions for tires capable of providing tire components and pneumatic tires having low-temperature properties and abrasion resistance that are equivalent to those of tire components and pneumatic tires formed from conventional synthetic rubber, respectively, while meeting the demand for a sound material-cycle society. The present invention relates to rubber compositions for tires containing a biomass-derived rubber obtained by polymerizing a biomass-derived monomer component, the biomass-derived rubber having a pMC (percent modern carbon) value of 1% or greater as determined in conformity with ASTM D6866-10, and having a Tg (glass transition temperature) value of -120°C to-80°C.

公开(公告)号：EP2186854A4

公开(公告)日：2012-04-25

申请号：EP08777045

申请日：2008-05-30

Applicant: SUMITOMO RUBBER IND

Inventor： KIKUCHI NAOHIKO ,  KOJIMA RYOJI

IPC: C08L21/00 ,  B60C1/00 ,  C08K5/372 ,  C08L81/04

CPC classification number: C08L9/00 ,  B60C1/0016 ,  C08K3/06 ,  C08K3/36 ,  C08K5/372 ,  C08L7/00 ,  C08L21/00 ,  C08L81/04 ,  C08L2666/02 ,  C08L2666/14 ,  C08L2666/04

公开(公告)号：EP2883909A4

公开(公告)日：2016-06-15

申请号：EP13834844

申请日：2013-09-06

Applicant: SUMITOMO RUBBER IND

Inventor： KOJIMA RYOJI ,  YOKOYAMA YUKA ,  YOSHINO MASAFUMI

IPC: C08L9/06 ,  B60C1/00 ,  C08F212/08 ,  C08F236/06 ,  C08F236/10 ,  C12P5/00 ,  C12P5/02 ,  C12P7/16

CPC classification number: C08F236/10 ,  B60C1/00 ,  B60C1/0016 ,  C07C11/167 ,  C08F212/08 ,  C08F236/06 ,  C08K3/04 ,  C08K3/36 ,  C08K5/548 ,  C08L7/00 ,  C08L9/06 ,  C12P5/005 ,  C12P5/026

Abstract: Provided are rubber compositions for tires capable of providing tire components and pneumatic tires that have the same level of fuel efficiency and wet grip performance (particularly, wet grip performance) as those of tire components and pneumatic tires containing conventional synthetic rubber, while satisfying the requirements for a sound material-cycle society. The present invention relates to rubber compositions for tires containing a biomass-derived rubber polymerized from an aromatic vinyl compound and a diene, the biomass-derived rubber having a pMC (percent modern carbon) measured in accordance with ASTM D 6866-10 of 1% or higher.

公开(公告)号：EP3199573A4

公开(公告)日：2018-07-04

申请号：EP15859009

申请日：2015-11-13

Applicant: SUMITOMO RUBBER IND

Inventor： TAKENAKA MIKAKO ,  KOJIMA RYOJI

IPC: C08J3/22 ,  B60C1/00 ,  C08J3/00 ,  C08K3/36 ,  C08L9/00 ,  C08L91/00

CPC classification number: C08L9/00 ,  B60C1/00 ,  B60C1/0016 ,  C08J3/005 ,  C08J3/226 ,  C08J3/24 ,  C08J2307/00 ,  C08J2309/00 ,  C08J2407/00 ,  C08J2409/00 ,  C08K3/36 ,  C08L91/00 ,  C08L2205/02 ,  C08L2310/00

Abstract: According to the process for preparing a vulcanized rubber composition of the invention comprising (a) a step of preparing a master batch comprising a butadiene rubber and silica, (b) a step of preparing a master batch comprising an isoprene rubber and silica, (c) a step of kneading the master batch obtained in (a) and the master batch obtained in(b), and (d) a step of vulcanizing a kneaded product obtained in (c), wherein the obtained vulcanized rubber composition comprises a BR phase and a IR phase, which are incompatible with each other, a predetermined abundance ratio ± of silica in the BR phase satisfies 0.3‰¤±‰¤0.7 (Relation 1), and a proportion ² of the butadiene rubber satisfies 0.4‰¤²‰¤0.8 (Relation 2) it is possible to improve performance on ice and abrasion resistance and to provide a vulcanized rubber composition having excellent performance on ice and abrasion resistance, and a studless tire with a tread made using the same.

公开(公告)号：EP3112412A4

公开(公告)日：2017-10-04

申请号：EP15765138

申请日：2015-02-18

Applicant: SUMITOMO RUBBER IND

Inventor： KOJIMA RYOJI

IPC: C08L21/00 ,  B60C1/00 ,  B60C11/14 ,  C08K7/02 ,  C08L7/00 ,  C08L9/00

CPC classification number: C08L9/00 ,  B60C1/0016 ,  B60C2011/145 ,  C08K7/02 ,  C08K2201/003 ,  C08K2201/011 ,  C08L7/00 ,  C08L2205/03 ,  C08L2205/16 ,  C08L21/00

公开(公告)号：EP3199574A4

公开(公告)日：2018-05-16

申请号：EP15859355

申请日：2015-11-13

Applicant: SUMITOMO RUBBER IND

Inventor： TAKENAKA MIKAKO ,  KOJIMA RYOJI

IPC: C08J3/22 ,  B60C1/00 ,  C08K3/36 ,  C08L9/00 ,  C08L45/00 ,  C08L91/00

CPC classification number: C08L9/00 ,  B60C1/00 ,  B60C1/0016 ,  C08J3/22 ,  C08J3/226 ,  C08J3/24 ,  C08J2309/00 ,  C08J2409/00 ,  C08K3/36 ,  C08L45/00 ,  C08L91/00 ,  C08L2205/02 ,  C08L2205/03 ,  C08L2310/00

Abstract: According to the process for preparing a vulcanized rubber composition of the invention comprising (a) a step of preparing a master batch comprising a butadiene rubber and silica, (b) a step of preparing a master batch comprising an isoprene rubber and silica, (c) a step of kneading the master batch obtained in (a) and the master batch obtained in (b), and (d) a step of vulcanizing a kneaded product obtained in (c), wherein the obtained vulcanized rubber composition has a BR phase and a IR phase which are incompatible with each other and comprises a predetermined amount of a terpene resin, a predetermined abundance ratio ± of silica in the BR phase satisfies 0.3‰¤±‰¤0.7 (Relation 1), and a proportion ² of the butadiene rubber satisfies 0.4‰¤²‰¤0.8 (Relation 2) it is possible to improve performance on ice, wet performance and abrasion resistance in good balance and to provide a vulcanized rubber composition having excellent performance on ice, wet performance and abrasion resistance, and a studless tire with a tread made using the same.

公开(公告)号：EP3199572A4

公开(公告)日：2018-05-02

申请号：EP15858974

申请日：2015-11-13

Applicant: SUMITOMO RUBBER IND

Inventor： TAKENAKA MIKAKO ,  KOJIMA RYOJI

IPC: C08J3/22 ,  B60C1/00 ,  C08F8/42 ,  C08K3/36 ,  C08L9/00 ,  C08L15/00 ,  C08L91/00

CPC classification number: C08L15/00 ,  B60C1/00 ,  C08F8/42 ,  C08J3/22 ,  C08J3/226 ,  C08J2307/00 ,  C08J2315/00 ,  C08J2407/00 ,  C08J2415/00 ,  C08K3/36 ,  C08L7/00 ,  C08L9/00 ,  C08L91/00 ,  C08L2310/00

Abstract: According to the process for preparing a vulcanized rubber composition of the invention comprising (a) a step of preparing a master batch comprising a modified conjugated diene polymer and silica, (b) a step of preparing a master batch comprising an isoprene rubber and silica, (c) a step of kneading the master batch obtained in (a) and the master batch obtained in (b), and (d) a step of vulcanizing a kneaded product obtained in (c), wherein the obtained vulcanized rubber composition comprises a phase A comprising a modified conjugated diene polymer and a phase B comprising an isoprene rubber, which are incompatible with each other, an abundance ratio ± of silica in the phase A satisfies 0.5‰¤±‰¤0.9 (Relation 1), and a proportion ² of the modified conjugated diene polymer satisfies 0.4‰¤²‰¤0.8 (Relation 2) it is possible to improve performance on ice and abrasion resistance and to provide a vulcanized rubber composition having excellent performance on ice and abrasion resistance, and a studless tire with a tread made using the same.

公开(公告)号：EP2746333A4

公开(公告)日：2015-06-10

申请号：EP12841889

申请日：2012-07-20

Applicant: SUMITOMO RUBBER IND

Inventor： KOJIMA RYOJI

IPC: C08L21/00 ,  B60C1/00 ,  C08K3/04 ,  C08K3/36 ,  C08L7/00 ,  C08L9/00 ,  C08L91/00

CPC classification number: C08L7/00 ,  B60C1/0016 ,  C08K3/013 ,  C08K3/04 ,  C08K3/36 ,  C08K5/01 ,  C08L9/00 ,  C08L91/00 ,  C08K3/0033

Abstract: Provided are: a rubber composition for studless winter tires, achieving balanced improvement in performance on ice and snow, wet grip performance, and abrasion resistance; and a studless winter tire including a tread formed from the same. The rubber composition for studless winter tires includes: a rubber component including NR and BR; an aromatic oil; silica; and carbon black, wherein the combined amount of NR and BR is 30 mass% or more per 100 mass% of the rubber component; the amount of aromatic oil is 12-85 parts by mass per 100 parts by mass of the rubber component; the silica content is 45 mass% or more per 100 mass% in total of silica and carbon black; the silica includes at least one silica (1) with an N 2 SA of 100 m 2 /g or less and at least one silica (2) with an N 2 SA of 180 m 2 /g or more; the combined amount of silicas (1) and (2) is 30-150 parts by mass per 100 parts by mass of the rubber component; and the amounts of silicas (1) and (2) satisfy: Amount of silica 1 × 0.2 ‰¤ Amount of silica 2 ‰¤ Amount of silica 1 × 6.5.

Abstract translation: 提供：用于无冬季轮胎的橡胶组合物，实现冰雪性能的均衡改善，湿抓地性能和耐磨性; 以及包括由其形成的胎面的无钉冬季轮胎。 无钉冬季轮胎的橡胶组合物包括：包含NR和BR的橡胶组分; 芳香油; 二氧化硅; 和炭黑，其中NR和BR的组合量为每100质量％的橡胶组分为30质量％以上; 相对于100质量份的橡胶成分，芳香油的含量为12〜85质量份。 二氧化硅含量相对于二氧化硅和炭黑的总量为100质量％为45质量％以上。 二氧化硅包括至少一种N 2 SA为100m 2 / g以下的二氧化硅（1）和至少一种N 2 SA为180m 2 / g以上的二氧化硅（2） 二氧化硅（1）和（2）的组合量相对于100质量份的橡胶成分为30〜150质量份。 二氧化硅（1）和（2）的含量满足：二氧化硅量1×0.2‰²二氧化硅量2‰¤二氧化硅量1×6.5。