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    BLOCK COPOLYMER, METHOD FOR PRODUCING SAME, RUBBER COMPOSITION USING SAID BLOCK COPOLYMER, AND TIRE
    1.
    发明公开
    BLOCK COPOLYMER, METHOD FOR PRODUCING SAME, RUBBER COMPOSITION USING SAID BLOCK COPOLYMER, AND TIRE 审中-公开

    公开(公告)号：EP3778684A1

    公开(公告)日：2021-02-17

    申请号：EP19776012.7

    申请日：2019-03-28

    申请人： Kuraray Co., Ltd. ,  Amyris, Inc.

    发明人： KODA, Daisuke

    IPC分类号： C08F297/04 ,  B60C1/00 ,  C08L53/02

    摘要： The present invention relates to a block copolymer that contains a polymer block A containing a farnesene-derived monomer unit (a1) and a random copolymer block B containing a C12 or lower conjugated diene-derived monomer unit (b1) and an aromatic vinyl compound-derived monomer unit (b2), the block copolymer having a ratio by mass of the polymer block A to the random copolymer block B (A/B) of 30/70 to 0.5/99.5, a content of the aromatic vinyl compound-derived monomer unit (b2) in the random copolymer block B of 1 to 50% by mass, and a weight average molecular weight (Mw) of 100,000 to 5,000,000.

    RUBBER COMPOSITION
    2.
    发明公开
    RUBBER COMPOSITION 审中-公开
    橡胶组合物

    公开(公告)号：EP3118252A1

    公开(公告)日：2017-01-18

    申请号：EP15761068.4

    申请日：2015-03-10

    申请人： Kuraray Co., Ltd.

    发明人： KODA, Daisuke ,  HIRATA, Kei

    IPC分类号： C08L21/00 ,  B60C1/00 ,  C08C19/28 ,  C08K3/04 ,  C08K3/36 ,  C08L15/00

    CPC分类号： C08L9/06 ,  B60C1/00 ,  C08K3/013 ,  C08L9/00 ,  C08L15/00 ,  C08L21/00 ,  C08L2205/06 ,  Y02T10/862

    摘要： [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 isoprene 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 15 to 80.

    摘要翻译： 本发明提供具有优异填料分散性的橡胶组合物，具有优异性能如耐磨性的交联产品，以及具有增强的滚动阻力性能的轮胎，并且通过使用该组合物或该组合物同时提高操纵稳定性和冰抓地性能 部分轮胎中的交联产物。 （A）固体橡胶（A）100质量份，向未改性液态二烯系橡胶（B）添加改性剂而得到的改性液态二烯系橡胶（B）0.1〜10质量份 '），并且具有来自改性剂的官能团和20〜150质量份的填料（C）。 该改性液态二烯系橡胶（B）满足下述（i）〜（iv）：（i）异戊二烯单元的含量相对于全部单体单元为50质量％以上，（ii）重均分子量 （iii）改性剂的添加量相对于未改性液状二烯系橡胶（B'）100质量份为3〜40质量份，（iv）平均重量（Mw）为25,000〜120,000， 每分子改性液体二烯橡胶（B）的官能团为15至80。

    RUBBER COMPOSITION AND TIRE
    4.
    发明公开
    RUBBER COMPOSITION AND TIRE 有权
    康乃狄兰州民主联合会

    公开(公告)号：EP2762525A1

    公开(公告)日：2014-08-06

    申请号：EP12836811.5

    申请日：2012-09-21

    申请人： Kuraray Co., Ltd. ,  Amyris, Inc.

    发明人： KUWAHARA, Shigenao ,  HIRATA, Kei ,  KODA, Daisuke

    IPC分类号： C08L7/00 ,  B60C1/00 ,  C08F136/22 ,  C08K3/04 ,  C08L47/00

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

    摘要： 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).

    摘要翻译： 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）。

    MODIFIED LIQUID DIENE POLYMER AND RUBBER COMPOSITION
    5.
    发明公开
    MODIFIED LIQUID DIENE POLYMER AND RUBBER COMPOSITION 审中-公开

    公开(公告)号：EP3763744A1

    公开(公告)日：2021-01-13

    申请号：EP19764978.3

    申请日：2019-03-04

    申请人： Kuraray Co., Ltd.

    发明人： OHTA, Satomi ,  KANBARA, Hiroshi ,  KODA, Daisuke

    IPC分类号： C08C19/25 ,  C08F297/02 ,  C08K3/013 ,  C08K3/04 ,  C08K3/36 ,  C08K5/5419 ,  C08L9/06 ,  C08L15/00 ,  C08L21/00

    摘要： 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.

    RUBBER COMPOSITION AND TIRE
    8.
    发明公开
    RUBBER COMPOSITION AND TIRE 有权
    康乃狄兰州民主联合会

    公开(公告)号：EP3037467A1

    公开(公告)日：2016-06-29

    申请号：EP14838208.8

    申请日：2014-08-11

    申请人： Kuraray Co., Ltd. ,  Amyris, Inc.

    发明人： KODA, Daisuke ,  HIRATA, Kei

    IPC分类号： C08L7/00 ,  B60C1/00 ,  C08K3/36 ,  C08L15/00

    CPC分类号： C08L9/06 ,  B60C1/00 ,  C08K3/36 ,  C08L7/00 ,  Y02T10/862 ,  C08L93/00

    摘要： The present invention provides a rubber composition capable of producing a rubber molded article that is excellent in rolling resistance performance, steering stability, mechanical strength and abrasion resistance, and a tire obtained by using the rubber composition in at least a part thereof. The present invention relates to a rubber composition including (A) a rubber component including at least one rubber selected from the group consisting of a synthetic rubber and a natural rubber, (B) silica and (C) a modified polymer of farnesene obtained by introducing a functional group into a polymer of farnesene, in which a content of the silica (B) in the rubber composition is from 20 to 150 parts by mass on the basis of 100 parts by mass of the rubber component (A), and a content of the modified farnesene polymer (C) in the rubber composition is from 2 to 10 parts by mass on the basis of 100 parts by mass of the silica (B).

    摘要翻译： 本发明提供一种能够制造滚动阻力性能，操纵稳定性，机械强度和耐磨性优异的橡胶成型体的橡胶组合物，以及在其至少一部分中使用橡胶组合物而得到的轮胎。 本发明涉及一种橡胶组合物，其包括（A）橡胶组分，其包含至少一种选自合成橡胶和天然橡胶的橡胶，（B）二氧化硅和（C）通过引入法获得的法呢烯的改性聚合物 基于100质量份橡胶组分（A），橡胶组合物中二氧化硅（B）的含量为20〜150质量份的法呢烯聚合物的官能团，含量 基于100质量份的二氧化硅（B），橡胶组合物中的改性法呢烯聚合物（C）为2〜10质量份。