公开(公告)号：JPS61268503A

公开(公告)日：1986-11-28

申请号：JP10902585

申请日：1985-05-21

Applicant: BRIDGESTONE CORP

Inventor： SAITO TADASHI ,  TAKESHITA MICHITAKA ,  HIRATA YASUSHI ,  KONDO HITOSHI ,  YAMAMOTO FUJIO ,  MASUNAGA MIKIO

IPC: C08K5/34 ,  B60C1/00 ,  B60C9/20 ,  B60C15/06 ,  C08L7/00 ,  C08L21/00

Abstract: PURPOSE:To improve durability by forming a space rubber and a soft stiffener rubber with a rubber composition to which a specified quantities of a specific bismaleiamide derivative and a C-nitro-compound are added. CONSTITUTION:A space rubber 7 which is provided on the end part of a belt layer 4 and a soft stiffer rubber 8 which wraps in the end part of a carcass which is folded back at a bead part 1, are formed by a rubber composition which is formed by adding a 0.2-10pts.wt. of bismaleiamide derivative whose general formula is represented by the formula I and a 0.2-5pts.wt. of a C-nitro- compound, to a 100pts.wt. of rubber component consisting of a rubber which is selected from a group consisting of a natural rubber and a diene group synthetic rubber. Due to this formation, durability can be improved.

公开(公告)号：JPS61190538A

公开(公告)日：1986-08-25

申请号：JP2940885

申请日：1985-02-19

Applicant: BRIDGESTONE CORP

Inventor： YAMAMOTO FUJIO ,  KONDO HITOSHI

IPC: C08L7/00 ,  C08L21/00 ,  C08L57/00

Abstract: PURPOSE:To obtain the titled composition suitable for tire tread use, by incorporating a base rubber with specified amount of petroleum resin of specific structure prepared from copolymerization of cyclopentadiene and/or dicyclopentadiene in specific proportion. CONSTITUTION:The objective composition can be obtained by incorporating 100pts. by wt. of at least one sort of rubber selected from natural rubber and diene-based synthetic rubbers (e.g., styrene butadiene rubber) with (A) 1-30(pref. 3-15)pts. by wt. of a petroleum resin prepared by copolymerization between A1: >=30wt% of cyclopentadiene and/or dicyclopentadiene and A2:

公开(公告)号：JPS61213232A

公开(公告)日：1986-09-22

申请号：JP5327185

申请日：1985-03-19

Applicant: BRIDGESTONE CORP

Inventor： SAITO TADASHI ,  KONDO HITOSHI ,  YAMAMOTO FUJIO

IPC: C08K5/34 ,  C08K7/00 ,  C08K7/06 ,  C08L7/00 ,  C08L21/00

Abstract: PURPOSE:To provide the titled composite for tire, etc., composed of a rubber- reinforcing steel cord and a rubber composition obtained by adding a straight- chain methylene bismaleimide to a natural rubber, etc., forming a strong bond between the rubber and the steel, and having excellent creeping property and heat-aging resistance. CONSTITUTION:The objective rubber-cord composite is produced by compounding (A) a rubber-reinforcing steel cord with (B) one or more rubber composition obtained by adding (i) 0.1-10pts.wt. of the straight-chain methylene bismaleimide of formula (n is integer of 1-6) (e.g. N,N'-hexamethylene bismaleimide) to (ii) 100pts.wt. of a rubber such as natural rubber, polyisoprene rubber, styrenebutadiene copolymer rubber, polybutadiene rubber, etc., and vulcanizing the composition at 150 deg.C for 20min.