公开(公告)号：US11034821B2

公开(公告)日：2021-06-15

申请号：US16329567

申请日：2017-09-01

Applicant: KURARAY CO., LTD.

Inventor： Hiromi Maeda ,  Daisuke Koda ,  Hiroshi Kanbara ,  Satomi Ohta

IPC: B60C1/00 ,  C08L9/06 ,  C08C19/25 ,  C08K3/04 ,  C08K3/36 ,  C08L15/00 ,  C08L21/00 ,  C08L7/00 ,  C08K3/013

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：US11970561B2

公开(公告)日：2024-04-30

申请号：US16978188

申请日：2019-03-04

Applicant: KURARAY CO., LTD.

Inventor： Satomi Ohta ,  Hiroshi Kanbara ,  Daisuke Koda

IPC: B60C1/00 ,  C08C19/20 ,  C08C19/25 ,  C08F297/02 ,  C08L9/00 ,  C08L9/06

CPC classification number: C08F297/02 ,  B60C1/00 ,  C08L9/06 ,  C08C19/20 ,  C08C19/25 ,  C08L9/00

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：US11124631B2

公开(公告)日：2021-09-21

申请号：US16329975

申请日：2017-09-01

Applicant: KURARAY CO., LTD.

Inventor： Hiromi Maeda ,  Daisuke Koda ,  Hiroshi Kanbara ,  Satomi Ohta

IPC: C08G18/73 ,  C08G18/10 ,  C08L9/06 ,  B60C1/00 ,  C08C19/25 ,  C08K3/04 ,  C08K3/36 ,  C08L15/00 ,  C08L21/00 ,  C08J3/24 ,  C08K3/013

Abstract: Disclosed herein is a rubber composition containing 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): (i) a weight average molecular weight (Mw) is not less than 1,000 and less than 15,000; (ii) a vinyl content is not more than 70 mol %; and (iii) an average number of functional groups per molecule of the modified liquid diene rubber (B) is 1 to 20.