公开(公告)号：US20240425635A1

公开(公告)日：2024-12-26

申请号：US18824401

申请日：2024-09-04

Applicant: SEKISUI CHEMICAL CO., LTD.

Inventor： Kokoro HAMACHI ,  Noritoshi YAGIHASHI ,  Haruka NISHIYAMA ,  Kazuto NATSUYAMA

IPC: C08F236/10 ,  B60C1/00 ,  C07C1/24 ,  C07C29/80 ,  C07C31/08 ,  C07C67/08 ,  C08C19/00 ,  C08F36/06 ,  C08F36/08 ,  C08J3/20 ,  C10J3/72 ,  C10K1/00 ,  C10L1/02 ,  C12N1/20 ,  C12P7/06 ,  C12P7/08 ,  C12R1/145

Abstract: Provided is a method for producing a non-petrochemical-derived conjugated diene polymer using an alcohol derived from a non-petrochemical raw material. The method is characterized in that a non-petrochemical-derived conjugated diene polymer is produced using an alcohol derived from a non-petrochemical raw material having an iron content of 0.0001 mg/L to 2 mg/L.

公开(公告)号：US12110358B2

公开(公告)日：2024-10-08

申请号：US16346864

申请日：2017-11-02

Applicant: ZEON CORPORATION

Inventor： Junji Kodemura ,  Shunjin Aihara ,  Yoshitaka Satoh

IPC: C08F36/08 ,  B29C41/00 ,  B29K105/00 ,  B32B7/12 ,  C08C2/06 ,  C08C19/00 ,  C08F4/46 ,  C08F136/08 ,  C08J5/02 ,  C08J5/18 ,  C08L9/10 ,  C08L47/00 ,  C09J5/00 ,  C09J109/10

CPC classification number: C08F36/08 ,  B29C41/003 ,  B32B7/12 ,  C08C2/06 ,  C08C19/00 ,  C08F4/461 ,  C08F136/08 ,  C08J5/02 ,  C08J5/18 ,  C08L9/10 ,  C08L47/00 ,  C09J5/00 ,  C09J109/10 ,  B29K2105/0064 ,  B32B2553/00 ,  C08J2309/10 ,  C09J2409/00 ,  C08F136/08 ,  C08F2/06 ,  C08F36/08 ,  C08F2/06 ,  C08F136/08 ,  C08F4/48 ,  C08F36/08 ,  C08F4/48

Abstract: A synthetic polyisoprene latex containing synthetic polyisoprene, wherein the synthetic polyisoprene constituting the synthetic polyisoprene latex includes a low-molecular weight synthetic isoprene chain having a molecular weight of less than 1,000,000 at a content rate of 10 to 70% by weight and a high-molecular weight synthetic isoprene chain having a molecular weight of 1,000,000 or more at a content rate of 30 to 90% by weight. Also, a method for producing the synthetic polyisoprene latex, wherein the synthetic polyisoprene containing the low-molecular weight synthetic isoprene chain and the high-molecular weight synthetic isoprene chain is obtained by polymerizing a monomer containing isoprene in an organic solvent by use of an organic alkali metal catalyst.

公开(公告)号：US20240327547A1

公开(公告)日：2024-10-03

申请号：US18574149

申请日：2022-06-30

Applicant: BRIDGESTONE CORPORATION

Inventor： Midori KAWADA ,  Yasuo HORIKAWA ,  Mari MIYANO

IPC: C08C19/00

CPC classification number: C08C19/00

Abstract: Provided is a crosslinked elastomer that can easily be decrosslinked. The crosslinked elastomer is obtained through crosslinking of a diene elastomer that has a vinyl bond content of 30 mass % or less and a weight-average molecular weight of 1,000 or more. The crosslinked elastomer includes a diboronic acid ester skeleton unit represented by a specific general formula (1) at a crosslinking site.

公开(公告)号：US11787879B2

公开(公告)日：2023-10-17

申请号：US17711208

申请日：2022-04-01

Applicant: Sumitomo Rubber Industries, Ltd.

Inventor： Takumi Kaneko ,  Kazuyoshi Shiga ,  Shigeru Yamago

IPC: C08F8/34 ,  C08F10/08 ,  C08F2/48 ,  C08F136/06 ,  C08C19/00 ,  C08C19/20 ,  C08L9/00

CPC classification number: C08F8/34 ,  C08F10/08

Abstract: An object of the present invention is to provide a production method of a diene-based polymer that can control the crosslinking morphology. The present invention provides a method for producing a modified diene-based polymer having a structure represented by the formula (1), comprising a first step of mixing a diene-based polymer and a dithioester compound to prepare a mixture; and a second step of irradiating a ray to the mixture under an inert atmosphere.




[In the formula (1), R1 and R2 represent an alkyl group having 1 or more carbon atoms, an aryl group having 6 or more carbon atoms, an aralkyl group having 6 or more carbon atoms, a hydrogen atom, or a halogen atom; and Z is an organic group, an organic group where a part of hydrogen atom of the above organic group is substituted, a hydrogen atom, or a halogen atom.]

公开(公告)号：US11492426B2

公开(公告)日：2022-11-08

申请号：US16987521

申请日：2020-08-07

Applicant: The Goodyear Tire & Rubber Company

Inventor： Seth Cody Ensign ,  Robert Alan Woloszynek

IPC: C08C19/22 ,  C08C19/28 ,  C08C19/00 ,  C08F136/06 ,  C08L9/00 ,  C08L15/00

Abstract: A functionalized elastomer comprising the reaction product of a living elastomeric polymer and a polymerization terminator of formula I [R1]n—B—[X—R2]m  I where B is boron; X is oxygen or nitrogen; R1 is independently vinyl, oxiranyl, phenyl, 1-alkenyl of 2 to 8 carbon atoms, alkyl of 1 to 8 carbon atoms including at least one halogen atom, 1-alkenyl of 2 to 8 carbon atoms including at least one halogen or one hydrogen; R2 is independently C1 to C8 alkyl, C8 to C14 aryl; or when m>1 R2 may be taken together to form a substituted or unsubstituted cyclic structure comprising 2 to 16 carbon atoms where the cyclic structure may be heterocyclic or non-heterocyclic; n is 1 or 2, m is 1 or 2, and n+m=3.

公开(公告)号：US20220289872A1

公开(公告)日：2022-09-15

申请号：US17761384

申请日：2020-09-18

Applicant: KURARAY CO., LTD.

Inventor： Yoshikazu UENO ,  Hiroshi KANBARA ,  Atsushi INATOMI ,  Junya TAKAI ,  Zhaoming MA

IPC: C08C19/25 ,  C08C19/26 ,  C08C19/00 ,  C08L15/00

Abstract: To provide a conjugated diene graft polymer having high transparency, heat resistance and weather resistance, and a method for producing the conjugated diene graft polymer. A method for producing a conjugated diene graft polymer in which a side chain (b) including a polymer including at least one monomer unit selected from the group consisting of a conjugated diene unit and an aromatic vinyl compound unit is bonded to a main chain (a) including a polymer including a conjugated diene unit, via a hetero atom Z serving as a branching point and having a valence of not less than 3, the method including a step of reacting a specific active end polymer and a specific functional group-modified conjugated diene polymer having a functional group in a side chain to thereby produce a conjugated diene graft polymer; and a step of recovering the conjugated diene graft polymer obtained.

公开(公告)号：US11286324B2

公开(公告)日：2022-03-29

申请号：US16471009

申请日：2017-12-19

Applicant: ZEON CORPORATION

Inventor： Yasuaki Watanabe

IPC: C08F236/06 ,  C08C19/00 ,  C08C1/15 ,  C08C3/02

Abstract: A carboxyl group-containing nitrile rubber comprising an α,β-ethylenically unsaturated nitrile monomer unit in a content of 5 to 60 wt % and having an iodine value of 120 or less, wherein the carboxyl group-containing nitrile rubber has a polymer Mooney viscosity (ML1+4, 100° C.) of 60 or less and a polymer pH of 7 or less.

公开(公告)号：US20200339786A1

公开(公告)日：2020-10-29

申请号：US16393493

申请日：2019-04-24

Applicant: Fina Technology, Inc.

Inventor： Olivier Defrain ,  Olivier Klein

IPC: C08L9/00 ,  C08C19/00

Abstract: A curable low sulfur liquid rubber composition including at least one polymer which contains, in polymerized form, at least one monomer having a carbon chain of four and a peroxide system which includes at least one organic peroxide and at least one coagent. The polymer has a vinyl content of 1% to 90% and a number average molecular weight of 800 g/mol to 70,000 g/mol. The curable low sulfur liquid rubber composition has a sulfur content of 0 to 1%, by weight, and is curable at a temperature of 100° C. to 190° C.

公开(公告)号：US10577488B2

公开(公告)日：2020-03-03

申请号：US16097847

申请日：2017-02-20

Applicant: Continental Reifen Deutschland GmbH

Inventor： Noa Pruss ,  Julia Grosse ,  Carla Recker ,  Katharina Herzog

IPC: C08L9/06 ,  C08C19/20 ,  C08C19/00 ,  C08L19/00 ,  B60C1/00 ,  C08L15/00 ,  B29B7/74 ,  C08K3/04 ,  C08K3/36

Abstract: A vulcanizate of a rubber mixture for a vehicle tire, the rubber mixture containing at least one filler and 10 to 100 phr of at least one polymer A of the following formula: PS—R1—S—R2)n where S is a sulfur atom, and P is a polymer chain which is obtainable by anionic polymerization of at least one conjugated diene and optionally one or more vinylaromatic compounds and which has optionally been chain end-modified, R1 is most preferably C1-C8-alkyl, R2 is preferably selected from H and —SiR3R4R5 in which R3, R4 and R5 are independently selected from H, C1-C16-alkyl, C6-C16-aryl and C7-C16-aralkyl, and n is an integer selected from 1 to 200, where the —S—R1—S—R2 group(s) are bonded to the backbone of the polymer chain P.

公开(公告)号：US10508179B2

公开(公告)日：2019-12-17

申请号：US15881843

申请日：2018-01-29

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Oscar O. Chung ,  Periagaram S. Ravishankar ,  Porter C. Shannon ,  John P. Soisson

IPC: C08L23/16 ,  C08J3/24 ,  C08L9/00 ,  C08L23/12 ,  C08C19/00

Abstract: A process for producing a thermoplastic vulcanizate, the process comprising: (i) charging a reactor with an oil-extended olefinic copolymer rubber, where the rubber is synthesized by a single-site catalyst, characterized by a multi-modal molecular weight distribution, and includes greater than 10 parts by weight extender oil per 100 parts by weight rubber; (ii) charging the reactor, contemporaneously or sequentially with respect to the rubber, with a thermoplastic resin, an oil, and a cure system to provide a pre-vulcanized mixture; and (iii) mixing the rubber, thermoplastic resin, oil, and cure system at a temperature above the melt temperature of the thermoplastic resin to thereby cause dynamic vulcanization of the rubber and produce the thermoplastic vulcanizate.