公开(公告)号：US20200369802A1

公开(公告)日：2020-11-26

申请号：US16769275

申请日：2018-11-30

Applicant: KURARAY CO., LTD.

Inventor： Daisuke KODA

IPC: C08F36/06

Abstract: A modified diene polymer is provided which may be added to a rubber composition together with a filler to allow the filler to be dispersed in a crosslinked product of the composition in a state that is ideal for attaining enhanced properties. A method for producing such modified diene polymers is also provided. The modified linear diene polymer has a specific functional group only at one end thereof, the average number of the functional groups per molecule being 0.8 to 1.

公开(公告)号：US20200254816A1

公开(公告)日：2020-08-13

申请号：US16643160

申请日：2018-08-29

Applicant: KURARAY CO., LTD.

Inventor： Daisuke KODA ,  Hiroshi KANBARA

IPC: B60C1/00 ,  B60C15/06 ,  C08L7/00 ,  C08L25/10 ,  C08F236/06 ,  C08F236/08 ,  C08F230/08 ,  C08K3/04 ,  C08K3/36

Abstract: The invention provides a heavy-duty tire rubber composition excellent in wet grip performance and steering stability, and a tire tread, a bead filler, a tire belt and a heavy-duty tire which each partially include the composition. The heavy-duty tire rubber composition includes 100 parts by mass of a solid rubber (A), 0.1 to 50 parts by mass of a modified liquid diene rubber (B) having a functional group derived from a silane compound with a specific structure, and 20 to 200 parts by mass of a filler (C), the modified liquid diene rubber (B) satisfying the following (i) and (ii): (i) the weight average molecular weight (Mw) is not less than 1,000 and not more than 120,000, and (ii) the vinyl content is not less than 30 mol % and less than 70 mol %.

公开(公告)号：US20210017320A1

公开(公告)日：2021-01-21

申请号：US16978188

申请日：2019-03-04

Applicant: KURARAY CO., LTD.

Inventor： Satomi OHTA ,  Hiroshi KANBARA ,  Daisuke KODA

IPC: C08F297/02 ,  C08L9/06 ,  B60C1/00

Abstract: The invention provides a modified liquid diene polymer that allows a rubber composition to give a crosslinked product which contains a filler in a dispersed state ideal for attaining enhanced properties and which also exhibits excellent properties such as wet grip and abrasion resistance. The invention also provides a rubber composition including the modified liquid diene polymer, a crosslinked product thereof, and a tire which includes a portion including the composition or the crosslinked product. The modified liquid diene polymer is a product of modification, with a specific silane compound, of a liquid diene block copolymer including a polymer block (b′1) or (b″1) containing butadiene units and a polymer block (b′2) or (b″2). The modified liquid diene polymer has a functional group derived from the silane compound, and satisfies specific conditions.

公开(公告)号：US20200332090A1

公开(公告)日：2020-10-22

申请号：US16643138

申请日：2018-08-29

Applicant: KURARAY CO., LTD.

Inventor： Daisuke KODA ,  Hiroshi KANBARA

IPC: C08L9/00 ,  B60C1/00

Abstract: The invention provides a heavy-duty tire rubber composition capable of giving heavy-duty tires which exhibit low heat generation properties and have good abrasion resistance, and also provides a tire tread, a bead filler, a tire belt and a heavy-duty tire which each partially include the composition. The heavy-duty tire rubber composition includes 100 parts by mass of a solid rubber (A), 0.1 to 50 parts by mass of a modified liquid diene rubber (B) having a functional group derived from a silane compound with a specific structure, and 20 to 200 parts by mass of a filler (C), the modified liquid diene rubber (B) satisfying the following (i) and (ii): (i) the weight average molecular weight (Mw) is not less than 1,000 and not more than 120,000, and (ii) the vinyl content is less than 30 mol %.

公开(公告)号：US20200207957A1

公开(公告)日：2020-07-02

申请号：US16643179

申请日：2018-08-29

Applicant: KURARAY CO., LTD.

Inventor： Hiroshi KANBARA ,  Daisuke KODA ,  Yosuke UEHARA

IPC: C08L9/06 ,  B60C1/00 ,  B60C11/00

Abstract: The invention provides a high-grip tire rubber composition excellent in steering stability, rolling resistance performance and abrasion resistance, and a tire tread, a bead filler, a tire belt and a pneumatic tire which each partially include the composition. The high-grip tire rubber composition includes 100 parts by mass of a solid rubber (A), the solid rubber (A) including not less than 60 mass % of a styrene butadiene rubber with 20 mass % or more styrene content, 0.1 to 90 parts by mass of a modified liquid diene rubber (B) having a functional group derived from a silane compound with a specific structure, and 20 to 150 parts by mass of a filler (C), the modified liquid diene rubber (B) satisfying the following (i) and (ii): (i) the weight average molecular weight (Mw) is 15,000 to 120,000, and (ii) the vinyl content is not more than 70 mol %.

公开(公告)号：US20150065636A1

公开(公告)日：2015-03-05

申请号：US14537156

申请日：2014-11-10

Applicant: KURARAY CO., LTD. ,  AMYRIS, Inc.

Inventor： Shigenao KUWAHARA ,  Kei HIRATA ,  Daisuke KODA

IPC: C08L9/06

CPC classification number: C08L9/06 ,  B60C1/00 ,  C08F136/22 ,  C08K3/04 ,  C08L7/00 ,  C08L21/00 ,  C08L47/00 ,  Y02T10/862

Abstract: The present invention relates to a rubber composition including (A) at least one rubber component selected from the group consisting of a synthetic rubber and a natural rubber; (B) a polymer of farnesene; and (C) carbon black having an average particle size of from 5 to 100 nm, a content of the carbon black (C) in the rubber composition being from 20 to 100 parts by mass on the basis of 100 parts by mass of the rubber component (A).

Abstract translation: 本发明涉及一种橡胶组合物，其包含（A）至少一种选自合成橡胶和天然橡胶的橡胶组分; （B）法呢烯的聚合物; 和（C）平均粒径为5〜100nm的炭黑，橡胶组合物中的炭黑（C）的含量为20〜100质量份，基于100质量份的橡胶 组分（A）。

公开(公告)号：US20200207956A1

公开(公告)日：2020-07-02

申请号：US16643181

申请日：2018-08-29

Applicant: KURARAY CO., LTD.

Inventor： Hiroshi KANBARA ,  Daisuke KODA

IPC: C08L7/00 ,  C08L9/06 ,  B60C11/00 ,  B60C1/00

Abstract: The invention provides a tire rubber composition capable of giving crosslinked products having excellent properties including mechanical strength such as abrasion resistance, a crosslinked product of the composition, and a tire tread, a bead filler, a tire belt and a pneumatic tire which each partially include the composition or the crosslinked product and which each exhibit satisfactory dry grip performance plus excellent wet grip performance and ice grip performance and can attain enhanced steering stability. The tire rubber composition includes 100 parts by mass of a solid rubber (A) having a glass transition temperature (Tg) of not more than −10° C., 0.1 to 50 parts by mass of a modified liquid diene rubber (B) having a functional group derived from a silane compound with a specific structure, and 20 to 200 parts by mass of a filler (C), the modified liquid diene rubber (B) satisfying the following (i) to (iv): (i) the weight average molecular weight (Mw) is not less than 1,000 and less than 15,000, (ii) the vinyl content is not more than 70 mol %, (iii) the average number of the functional groups per molecule of the modified liquid diene rubber (B) is 1 to 20, and (iv) the glass transition temperature (Tg) is not more than 0° C.

公开(公告)号：US20190218376A1

公开(公告)日：2019-07-18

申请号：US16329567

申请日：2017-09-01

Applicant: KURARAY CO., LTD.

Inventor： Hiromi MAEDA ,  Daisuke KODA ,  Hiroshi KANBARA ,  Satomi OHTA

IPC: C08L9/06 ,  C08L7/00 ,  C08L15/00 ,  B60C1/00

CPC classification number: C08L9/06 ,  B60C1/00 ,  C08C19/25 ,  C08K3/013 ,  C08K3/04 ,  C08K3/36 ,  C08L7/00 ,  C08L15/00 ,  C08L21/00 ,  C08L2312/00 ,  Y02T10/862

Abstract: A rubber composition includes 100 parts by mass of a solid rubber (A), 0.1 to 50 parts by mass of a modified liquid diene rubber (B) having a functional group derived from a silane compound represented by the formula (1), and 20 to 200 parts by mass of a filler (C), the modified liquid diene rubber (B) satisfying (i) to (iii) below: (i) The weight average molecular weight (Mw) is 15,000 to 120,000. (ii) The vinyl content is not more than 70 mol %. (iii) The average number of functional groups per molecule of the modified liquid diene rubber (B) is 1 to 30.

公开(公告)号：US20170073509A1

公开(公告)日：2017-03-16

申请号：US15125420

申请日：2015-03-10

Applicant: KURARAY CO., LTD.

Inventor： Daisuke KODA ,  Kei HIRATA

IPC: C08L9/06

CPC classification number: C08L9/06 ,  B60C1/00 ,  C08C19/28 ,  C08F136/06 ,  C08F236/06 ,  C08K3/06 ,  C08K3/36 ,  C08K5/09 ,  C08K5/47 ,  C08K5/548 ,  C08L7/00 ,  C08L15/00 ,  C08L91/00 ,  C08L91/06 ,  C08L2205/06 ,  Y02T10/862 ,  C08F236/08

Abstract: [Object]The invention provides rubber compositions having excellent filler dispersibility, crosslinked products having excellent properties such as abrasion resistance, and tires that exhibit enhanced rolling resistance performance and attain simultaneous enhancements in steering stability and ice grip performance by virtue of using the compositions or the crosslinked products in portions of the tires.[Solution]The rubber composition includes 100 parts by mass of a solid rubber (A), 0.1 to 10 parts by mass of a modified liquid diene rubber (B) that is obtained by adding a modifying agent to an unmodified liquid diene rubber (B′) and has functional groups derived from the modifying agent, and 20 to 150 parts by mass of a filler (C). The modified liquid diene rubber (B) satisfies the following (i) to (iv): (i) the content of butadiene units is not less than 50 mass % relative to the total of all monomer units, (ii) the weight average molecular weight (Mw) is 25,000 to 120,000, (iii) the amount of the modifying agent added is 3 to 40 parts by mass per 100 parts by mass of the unmodified liquid diene rubber (B′), and (iv) the average number of functional groups per molecule of the modified liquid diene rubber (B) is 5 to 80.

Abstract translation: 橡胶组合物包括100质量份固体橡胶（A），0.1至10质量份改性液体二烯橡胶（B），其通过将改性剂加入未改性液体二烯橡胶（B'）和 具有来自改性剂的官能团，20〜150质量份填料（C）。 改性液态二烯橡胶（B）满足以下（i）〜（iv）：（i）丁二烯单元的含量相对于全部单体单元的总量为50质量％以上，（ii）重均分子量 重量（Mw）为25,000〜120,000，（iii）相对于100质量份未改性液态二烯系橡胶（B'），添加量为3〜40质量份，（iv） 每分子改性液体二烯橡胶（B）的官能团为5〜80。

公开(公告)号：US20160053097A1

公开(公告)日：2016-02-25

申请号：US14780802

申请日：2014-03-25

Applicant: KURARAY CO., LTD.

Inventor： Daisuke KODA ,  Kei HIRATA ,  Hiroshi KANBARA

IPC: C08L9/06 ,  C08L9/00 ,  C08L7/00

CPC classification number: C08L9/06 ,  B60C1/00 ,  C08K3/013 ,  C08K3/04 ,  C08K5/0025 ,  C08L7/00 ,  C08L9/00 ,  Y02T10/862

Abstract: The invention relates to a rubber composition having a good processability, and simultaneously having a rolling resistance performance and hardness after vulcanization at high levels, with which the contamination of the mold for processing due to the bleeding-out of the plasticizer can be suppressed, and in which the migration of the plasticizer and so on is suppressed to a low level; a vulcanized rubber obtained by vulcanizing the rubber composition; and to a tire including the rubber composition as at least a part thereof. The rubber composition contains 100 parts by mass of rubber component (A) composed of at least one of a synthetic rubber and a natural rubber, 0.1 to 50 parts by mass of a diene polymer (B), 20 to 150 parts by mass of a filler (C), 0.1 to 10 parts by mass of a vulcanizing agent (D), 0.1 to 15 parts by mass of a vulcanization accelerator (E) and 0.1 to 15 parts by mass of vulcanization aid (F).

Abstract translation: 本发明涉及具有良好加工性的橡胶组合物，同时具有高水平硫化后的滚动阻力性能和硬度，可以抑制由于增塑剂渗出而导致的加工模具污染;以及 其中增塑剂的迁移等被抑制到低水平; 通过硫化橡胶组合物获得的硫化橡胶; 以及包括至少部分橡胶组合物的轮胎。 橡胶组合物含有100质量份由合成橡胶和天然橡胶中的至少一种构成的橡胶成分（A），0.1〜50质量份的二烯系聚合物（B），20〜150质量份的 填料（C），0.1〜10质量份硫化剂（D），0.1〜15质量份硫化促进剂（E）和0.1〜15质量份硫化助剂（F）。