公开(公告)号：US11279785B2

公开(公告)日：2022-03-22

申请号：US16643984

申请日：2018-08-28

Applicant: BRIDGESTONE CORPORATION

Inventor： Shigenaga Takano ,  Shojiro Kaita ,  Olivier Tardif

IPC: C08F236/06 ,  B60C1/00 ,  C08F4/52

Abstract: It is an object of the disclosure to provide a production method for a copolymer in which a copolymer with a high content of cis-1,4 bonds of a conjugated diene portion can be obtained at a high yield even when a cyclic olefin compound is used as a monomer. In order to achieve the object, the present disclosure includes a step of polymerizing a conjugated diene compound and a cyclic olefin compound in the presence of a catalyst composition containing a rare-earth element compound represented by the following formula (I), at least one compound selected from the group consisting of an ionic compound and a halogen compound, a compound represented by the following formula (II), and a coordination compound that can be a ligand: M-(AQ1)(AQ2)(AQ3)  (I) YR1aR2bR3c  (II).

公开(公告)号：US09714338B2

公开(公告)日：2017-07-25

申请号：US14410843

申请日：2013-07-11

Applicant: BRIDGESTONE CORPORATION

Inventor： Satoru Tamaki ,  Shojiro Kaita ,  Junko Matsushita

IPC: C08F2/04 ,  C08L47/00 ,  C08F36/08 ,  C08L9/00 ,  B60C1/00 ,  C08L25/06

CPC classification number: C08L47/00 ,  B60C1/00 ,  B60C1/0016 ,  C08F36/08 ,  C08L9/00 ,  C08L25/06 ,  C08L2205/025 ,  C08L2314/00 ,  C08F36/00 ,  C08F4/545

Abstract: An object of the present invention is to provide a polymer composition having properties resembling those of natural rubber, e.g. good durability (fracture resistance, wear resistance, and crack growth resistance), and a method for manufacturing the polymer composition. Specifically, the present invention provides a method for manufacturing a polymer composition including a mixture of polyisoprene and polystyrene/polybutadiene, comprising: polymerizing styrene monomer or butadiene monomer in the presence of a catalyst to synthesize polystyrene or polybutadiene; adding isoprene monomer to the polystyrene or polybutadiene thus synthesized, to synthesize polyisoprene and thus generate said mixture, wherein content of the styrene monomer or the butadiene monomer is set to be 10 mol % or less with respect to the total quantity of the styrene monomer/the butadiene monomer and the isoprene monomer.

公开(公告)号：US10239964B2

公开(公告)日：2019-03-26

申请号：US15502882

申请日：2015-07-02

Applicant: BRIDGESTONE CORPORATION

Inventor： Yusuke Yamagata ,  Narukuni Hirata ,  Tomoe Tanabe ,  Shojiro Kaita ,  Madoka Kimura

IPC: C08F4/54 ,  C08F236/06 ,  C08F236/08 ,  B60C1/00 ,  C08F136/04 ,  C08L9/00 ,  C08F136/06 ,  C08F136/08

Abstract: A method for manufacturing a conjugated diene polymer that can increase the robustness of a polymerization reaction system is provided. Also, a conjugated diene polymer, with a high cis-1,4-bond content, that is manufactured by this method for manufacturing is provided. A method for manufacturing a conjugated diene polymer includes polymerizing a conjugated diene monomer using a polymerization catalyst composition including a rare earth element compound and a compound having a cyclopentadiene skeleton, and a conjugated diene polymer manufactured with this method for manufacturing has a cis-1,4-bond content of 95% or greater.

公开(公告)号：US10087312B2

公开(公告)日：2018-10-02

申请号：US15832869

申请日：2017-12-06

Applicant: BRIDGESTONE CORPORATION

Inventor： Junko Matsushita ,  Shojiro Kaita ,  Satoru Tamaki

IPC: C08L9/00 ,  B60C1/00 ,  C08L7/00 ,  C08F36/08

Abstract: Provided is a rubber composition including a rubber component. The rubber component contains at least a polymer that is a synthesized polyisoprene or an isoprene copolymer and that has 20% or less gel fraction.

公开(公告)号：US09796801B2

公开(公告)日：2017-10-24

申请号：US14763856

申请日：2014-02-14

Applicant: BRIDGESTONE CORPORATION

Inventor： Shojiro Kaita ,  Satoru Tamaki

IPC: C08F4/54 ,  C08F136/08

CPC classification number: C08F136/08 ,  C08F4/545

Abstract: The polymerization catalyst composition includes: Component (A): a rare earth element compound of formula (i): M-(NQ1)(NQ2)(NQ3) (where M is at least one selected from lanthanoid, scandium, and yttrium, and NQ1, NQ2 and NQ3 are amide groups and each have a M-N bond; Component (B): a hydrocarbyl aluminoxane compound having a C1-20 hydrocarbon group; and Component (C): a compound of formula (X): YR1aR2bR3c (where Y is a metal selected from groups 1, 2, 12 and 13 in a periodic table, R1 and R2 are C1-10 hydrocarbon groups or hydrogen atoms and R3 is a C1-10 hydrocarbon group).

公开(公告)号：US09540464B2

公开(公告)日：2017-01-10

申请号：US14379176

申请日：2013-03-06

Applicant: BRIDGESTONE CORPORATION

Inventor： Junko Matsushita ,  Shojiro Kaita ,  Satoru Tamaki

IPC: C08F36/08 ,  C08L9/00 ,  C08F136/08 ,  B60C1/00 ,  C08C2/04 ,  C08K3/00 ,  C08C19/44

CPC classification number: C08F136/08 ,  B60C1/0016 ,  C08C2/04 ,  C08C19/44 ,  C08F36/08 ,  C08F2500/01 ,  C08K3/013 ,  C08L9/00 ,  C08F4/545

Abstract: The polymer of the present invention is a synthesized polyisoprene or an isoprene copolymer. The polymer has a number average molecular weight (Mn) of 1.5 million or more when measured by using gel permeation chromatography (GPC).

Abstract translation: 本发明的聚合物是合成的聚异戊二烯或异戊二烯共聚物。 当使用凝胶渗透色谱（GPC）测量时，聚合物的数均分子量（Mn）为150万以上。

公开(公告)号：US09284384B2

公开(公告)日：2016-03-15

申请号：US14394428

申请日：2013-04-18

Applicant: BRIDGESTONE CORPORATION

Inventor： Junko Matsushita ,  Shojiro Kaita

IPC: C08F2/44 ,  C08F36/04 ,  C08F136/06 ,  C08K3/36 ,  B60C1/00

CPC classification number: C08F2/44 ,  B60C1/0016 ,  C08F36/04 ,  C08F136/06 ,  C08K3/36 ,  C08F4/545 ,  C08F4/025

Abstract: A method for producing a polymer containing silica that does not involve long kneading time, and a polymer composition having an intended low heat generation property. A polymerization catalyst composition is produced by mixing and aging a second element and a third element, and then adding a first element to the mixture to react the first element with the mixture. The first element contains a compound that contains a rare earth metal element, the second element contains a compound represented by the following formula (X), and the third element contains silica. YR1aR2bR3c (X) (In the formula, Y is a metal; R1 and R2 are hydrogen atoms or hydrocarbon groups; and R3 is a hydrocarbon group, and R1, R2, and R3 are the same as or different from each other, a, b, and c are 0 or 1.).

Abstract translation: 一种不涉及长混炼时间的含有二氧化硅的聚合物的制造方法和具有预定的低发热性的聚合物组合物。 通过混合和老化第二元素和第三元素制备聚合催化剂组合物，然后向混合物中加入第一元素以使第一元素与混合物反应。 第一元素含有含有稀土元素的化合物，第二元素含有下述式（X）表示的化合物，第三元素含有二氧化硅。 YR1aR2bR3c（X）（式中，Y为金属，R1，R2为氢原子或烃基，R3为烃基，R1，R2和R3相同或不同， b和c为0或1）。

公开(公告)号：US20150112021A1

公开(公告)日：2015-04-23

申请号：US14394428

申请日：2013-04-18

Applicant: BRIDGESTONE CORPORATION

Inventor： Junko Matsushita ,  Shojiro Kaita

IPC: C08F2/44 ,  C08K3/36 ,  C08F136/06

CPC classification number: C08F2/44 ,  B60C1/0016 ,  C08F36/04 ,  C08F136/06 ,  C08K3/36 ,  C08F4/545 ,  C08F4/025

Abstract: A method for producing a polymer containing silica that does not involve long kneading time, and a polymer composition having an intended low heat generation property. A polymerization catalyst composition is produced by mixing and aging a second element and a third element, and then adding a first element to the mixture to react the first element with the mixture. The first element contains a compound that contains a rare earth metal element, the second element contains a compound represented by the following formula (X), and the third element contains silica. YR1aR2bR3c (X) (In the formula, Y is a metal; R1 and R2 are hydrogen atoms or hydrocarbon groups; and R3 is a hydrocarbon group, and R1, R2, and R3 are the same as or different from each other, a, b, and c are 0 or 1.)

Abstract translation: 一种不涉及长混炼时间的含有二氧化硅的聚合物的制造方法和具有预定的低发热性的聚合物组合物。 通过混合和老化第二元素和第三元素制备聚合催化剂组合物，然后向混合物中加入第一元素以使第一元素与混合物反应。 第一元素含有含有稀土元素的化合物，第二元素含有下述式（X）表示的化合物，第三元素含有二氧化硅。 YR1aR2bR3c（X）（式中，Y为金属，R1，R2为氢原子或烃基，R3为烃基，R1，R2和R3相同或不同， b和c分别为0或1.）

公开(公告)号：US20150080525A1

公开(公告)日：2015-03-19

申请号：US14383363

申请日：2013-03-06

Applicant: BRIDGESTONE CORPORATION

Inventor： Junko Matsushita ,  Shojiro Kaita ,  Satoru Tamaki

IPC: C08L9/00

CPC classification number: C08L9/00 ,  B60C1/00 ,  B60C1/0016 ,  C08F36/08 ,  C08K3/04 ,  C08L7/00 ,  C08F4/545

Abstract: Provided is a rubber composition including a rubber component. The rubber component contains at least a polymer that is a synthesized polyisoprene or an isoprene copolymer and that has 20% or less gel fraction.

Abstract translation: 提供一种包含橡胶组分的橡胶组合物。 橡胶组分至少含有作为合成的聚异戊二烯或异戊二烯共聚物的聚合物，并且具有20％或更少的凝胶分数。

公开(公告)号：US12084536B2

公开(公告)日：2024-09-10

申请号：US17287626

申请日：2019-10-17

Applicant: BRIDGESTONE CORPORATION

Inventor： Shigenaga Takano ,  Shojiro Kaita ,  Kohtaro Osakada ,  Daisuke Takeuchi ,  Shinji Yamakawa

IPC: C08F36/06 ,  B60C1/00 ,  C08F4/70 ,  C08F136/06

CPC classification number: C08F36/06 ,  B60C1/00 ,  C08F4/70 ,  C08F136/06

Abstract: Provided is novel polybutadiene having high isotacticity. The polybutadiene has a triad isotacticity (mm) of 72% or more.