公开(公告)号：US20210017320A1

公开(公告)日：2021-01-21

申请号：US16978188

申请日：2019-03-04

申请人： KURARAY CO., LTD.

发明人： Satomi OHTA ,  Hiroshi KANBARA ,  Daisuke KODA

IPC分类号： C08F297/02 ,  C08L9/06 ,  B60C1/00

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.

公开(公告)号：US20190194429A1

公开(公告)日：2019-06-27

申请号：US16329975

申请日：2017-09-01

申请人： KURARAY CO., LTD.

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

IPC分类号： C08L9/06 ,  C08L15/00 ,  C08K3/013 ,  C08K3/04 ,  C08K3/36 ,  B60C1/00

CPC分类号： C08L9/06 ,  B60C1/00 ,  C08C19/25 ,  C08J3/24 ,  C08K3/013 ,  C08K3/04 ,  C08K3/36 ,  C08K2201/003 ,  C08L15/00 ,  C08L21/00 ,  C08L2312/00 ,  Y02T10/862

摘要： 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.

公开(公告)号：US20190218376A1

公开(公告)日：2019-07-18

申请号：US16329567

申请日：2017-09-01

申请人： KURARAY CO., LTD.

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

IPC分类号： C08L9/06 ,  C08L7/00 ,  C08L15/00 ,  B60C1/00

CPC分类号： C08L9/06 ,  B60C1/00 ,  C08C19/25 ,  C08K3/013 ,  C08K3/04 ,  C08K3/36 ,  C08L7/00 ,  C08L15/00 ,  C08L21/00 ,  C08L2312/00 ,  Y02T10/862

摘要： 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.