公开(公告)号：US20220306822A1

公开(公告)日：2022-09-29

申请号：US17780087

申请日：2020-11-10

Applicant: KURARAY CO., LTD.

Inventor： Eiichi ISHIDA ,  Daisuke KODA ,  Toru ASADA ,  Shinichi TAKEMOTO ,  Shuhei YORIMITSU ,  Hiroyuki KAWAI

IPC: C08J5/24 ,  C08L23/16 ,  C08L7/00 ,  D06M15/356

Abstract: To provide surface-modified fibers and reinforcing fibers that are capable of enhancing the adhesiveness to rubber, without the use of resorcinol and formaldehyde, and a molded article using the same. Surface-modified fibers include fibers, and a surface-modifying layer covering at least a part of a surface of the fibers, and have a solid surface zeta potential on a surface of the surface-modifying layer of −20.0 to 30.0 mV.

公开(公告)号：US20220056245A1

公开(公告)日：2022-02-24

申请号：US17413571

申请日：2019-12-12

Applicant: KURARAY CO., LTD.

Inventor： Daisuke KODA ,  Yoshikazu UENO

IPC: C08L9/06 ,  B60C1/00

Abstract: Provided are a rubber composition which can give a crosslinked product with enhanced tensile strength, and a pneumatic tire including the rubber composition as a portion thereof. The rubber composition includes a solid rubber (A), a hydrogenated aromatic vinyl-conjugated diene random copolymer (B), and a filler (C). The random copolymer (B) satisfies the following (i) to (iv). (i) The content of aromatic vinyl units is 10 to 70 mass %. (ii) The vinyl content in conjugated diene units of the random copolymer (B) before hydrogenation is 10 to 70 mol %. (iii) The hydrogenation ratio of the conjugated diene units is not less than 10 mol %. (iv) The weight average molecular weight is 3,000 to 100,000.

公开(公告)号：US20210017378A1

公开(公告)日：2021-01-21

申请号：US17040829

申请日：2019-03-28

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

Inventor： Daisuke KODA

IPC: C08L53/02 ,  C08F212/08 ,  C08F236/06 ,  C08F236/22 ,  C08K3/04 ,  C08K3/36 ,  C08K5/5419 ,  B60C1/00

Abstract: 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.

公开(公告)号：US20200332089A1

公开(公告)日：2020-10-22

申请号：US16643128

申请日：2018-08-29

Applicant: KURARAY CO., LTD.

Inventor： Hiroshi KANBARA ,  Daisuke KODA

IPC: C08L7/00 ,  C08L9/06 ,  B60C15/06 ,  B60C1/00

Abstract: 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 15,000 to 120,000, (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 30, and (iv) the glass transition temperature (Tg) is not more than 0° C.

公开(公告)号：US20170260374A1

公开(公告)日：2017-09-14

申请号：US15604111

申请日：2017-05-24

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

Inventor： Daisuke KODA ,  Kei Hirata

IPC: C08L9/06 ,  C08K3/04 ,  C08K3/36 ,  C08F236/22 ,  C08L21/00 ,  C08F236/08 ,  B60C1/00 ,  C08L47/00

Abstract: The present invention relates to a copolymer including a monomer unit (a) derived from isoprene and a monomer unit (b) derived from farnesene; a process for producing the copolymer including at least the step of copolymerizing isoprene with farnesene; a rubber composition including (A) the copolymer, (B) a rubber component and (C) carbon black; a rubber composition including (A) the copolymer, (B) a rubber component and (D) silica; a rubber composition including (A) the copolymer, (B) a rubber component, (C) carbon black and (D) silica; and a tire using the rubber composition at least as a part thereof.

公开(公告)号：US20160200902A1

公开(公告)日：2016-07-14

申请号：US14913638

申请日：2014-08-11

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

Inventor： Daisuke KODA ,  Kei HIRATA

IPC: C08L9/06

CPC classification number: C08L9/06 ,  B60C1/00 ,  C08K3/36 ,  C08L7/00 ,  Y02T10/862 ,  C08L93/00 ,  C08L15/00

Abstract: 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).

Abstract translation: 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。 橡胶组合物技术领域本发明涉及一种橡胶组合物，其包含（A）橡胶成分，所述橡胶成分包含选自合成橡胶和天然橡胶中的至少一种橡胶，（B）二氧化硅和（C）通过引入得到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。

公开(公告)号：US20240279514A1

公开(公告)日：2024-08-22

申请号：US18567853

申请日：2022-06-08

Applicant: KURARAY CO., LTD.

Inventor： Yoshikazu UENO ,  Yosuke UEHARA ,  Daisuke KODA

IPC: C09J11/08 ,  C09J107/00 ,  C09J109/06

CPC classification number: C09J11/08 ,  C09J107/00 ,  C09J109/06

Abstract: An adhesive composition containing at least one solid rubber (A) selected from a natural rubber, a polyisoprene rubber, a polybutadiene rubber, a styrene-butadiene copolymer rubber, a styrene-isoprene copolymer rubber, an acrylonitrile-butadiene copolymer rubber, a chloroprene rubber, an ethylene-propylene rubber, and a butyl rubber, and 5 to 250 parts by mass of a liquid farnesene-based rubber (B) and 10 to 500 parts by mass of a tackifier resin (C), relative to 100 parts by mass of the solid rubber (A), in which the liquid farnesene-based rubber (B) meets the following (I) and (II): (I) a melt viscosity measured at 38° C. is in a range of 0.1 to 3,000 Pa·s; and (II) when a measurement is performed through a gel permeation chromatography (GPC), a maximum peak-molecular weight (Mt) is 3,000 to 200,000 and a molecular weight distribution (Mw/Mn) is 1.0 to 1.4.

公开(公告)号：US20220267537A1

公开(公告)日：2022-08-25

申请号：US17625489

申请日：2020-07-10

Applicant: KURARAY CO., LTD.

Inventor： Daisuke KODA

IPC: C08G81/02 ,  C08F279/02 ,  C08F222/06 ,  C08F36/08

Abstract: The present invention provides a modified conjugated diene polymer that has excellent hydrophilicity and is useful for modification of polar polymers. The present invention also provides a modified conjugated diene polymer and a polymer modifier that, when used for modification of a polar polymer, can enhance characteristics, for example, flexibility, of the composition including the polymer and also offer excellent processability and shaping properties. The present invention further provides a polymer composition including such a conjugated diene polymer. A polymer modifier (A) includes a modified conjugated diene polymer (A1) having a hydrophilic group having a polyethylene glycol structure.

公开(公告)号：US20220220286A1

公开(公告)日：2022-07-14

申请号：US17612824

申请日：2020-05-21

Applicant: KURARAY CO., LTD.

Inventor： Yoshikazu UENO ,  Daisuke KODA

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

Abstract: A diene rubber may give a crosslinked product or forming a rubber composition which has high levels of both ice grip performance and wet grip performance; a rubber composition may include the diene rubber; a tire member may be formed from the rubber composition or a crosslinked product thereof; and a tire may include the rubber composition or a crosslinked product thereof as at least a portion thereof. A resin modifier may include the diene rubber and give such a resin composition. A diene rubber may include butadiene units and an Mw of 5,000 to 50,000, and may satisfy (i) to (iii): (i) βcp>0; (ii) β12>40; and (iii) βcp/(β12−40)≤2, wherein β12 is the mol % of 1,2-bonded butadiene units, and βcp is the mol % of specific structural units, both with respect to all butadiene units present in the diene rubber.

公开(公告)号：US20210246299A1

公开(公告)日：2021-08-12

申请号：US16972849

申请日：2019-06-07

Applicant: KURARAY CO., LTD.

Inventor： Yusuke AMANO ,  Eiichi ISHIDA ,  Kazuhiko MAEKAWA ,  Daisuke KODA ,  Hiroshi KANBARA

IPC: C08L51/04 ,  C08L51/06 ,  C08L29/04 ,  C08L23/08 ,  C08L23/22 ,  C08F236/06 ,  C08F236/08 ,  C08K3/04 ,  C08K3/36 ,  C08K5/54 ,  C08L9/06 ,  C08L7/00 ,  C08L91/00 ,  B60C1/00

Abstract: The present invention provides a rubber composition having superior moldability, wear resistance, and grip performance, and tires therewith. The present invention relates to a rubber composition comprising: a copolymer (B) constituted of a vinyl alcohol polymer (B-1) region and a diene polymer (B-2) region; and a rubber component (C), wherein the rubber composition comprises 1 to 20 parts by mass of the copolymer (B) relative to 100 parts by mass of the rubber component (C).