CONJUGATED DIOLEFIN COPOLYMER RUBBER AND RUBBER COMPOSITION,申请号JP19980210084-传众专利搜索

CONJUGATED DIOLEFIN COPOLYMER RUBBER AND RUBBER COMPOSITION

申请公布号：JP2000038423(A)

申请号：JP19980210084

申请日期：1998.07.24

申请公布日期：2000.02.08

申请人：

JSR CORP

发明人：TADAKI TOSHIHIRO;KOBAYASHI NAOICHI;AKEMA HIROSHI

分类号：C08K3/04;C08F8/00;C08F236/10;C08K3/36;C08L9/06;(IPC1-7):C08F236/10

主分类号：C08K3/04

摘要：PROBLEM TO BE SOLVED: To provide a diolefin copolymer rubber having good processability and improved low-hysteresis loss and wet-skid characteristics without lowering the abrasion resistance and breaking characteristics. SOLUTION: The objective conjugated diolefin copolymer rubber satisfies the following conditions. (1) The copolymer is produced by the copolymerization of a conjugated diolefin and an aromatic vinyl compound; (2) not less than 70% of the polymer chain in the total polymer chain has amino group on the polymerization starting terminal; (3) the content of bonded aromatic vinyl compound is 5-55 wt.%; (4) the amount of single aromatic vinyl compound unit composed of singly bonded aromatic vinyl compound is >=50 wt.% based on the total bonded aromatic vinyl compound; (5) the amount of long-chain aromatic vinyl compound unit composed of >=8 aromatic vinyl compounds bonded to form a chain is <10% based on the total bonded aromatic vinyl compound; and (6) the molecular weight distribution is monomodal and the ratio of weight- average molecular weight (Mw) to number-average molecular weight (Mn) (Mw/Mn) is >=1.3 and <3.0.