公开(公告)号：JPS61255946A

公开(公告)日：1986-11-13

申请号：JP9659085

申请日：1985-05-09

Applicant: BRIDGESTONE CORP

Inventor： TAKESHITA MICHITAKA ,  KIURA MITSUO ,  ITO SEISHIRO ,  IHARA TATSUHIKO

IPC: C08K3/04 ,  C08L7/00 ,  C08L21/00 ,  C08L21/02

Abstract: PURPOSE:To provide the rubber compsn. having improved tensile strength and wear resistance and suitable for use as a material for tires, by using, as a main component, a wet master batch obtd. by dispersing modified carbon black in a diene rubber latex. CONSTITUTION:The surface of a reinforcing carbon black having a nitrogen adsorption surface area of 70-200m /g and a DBP absorption of 80-130ml/100g is treated with low-temperature plasma to prepare a modified carbon black having a hydrophilicity level of 2-4. 30-150pts.wt. said modified carbon black as a water slurry is dispersed in 100pts.wt. (on a solid basis) rubber latex com prising natural rubber or a diene rubber component such as styrene/butadiene copolymer rubber to prepare a wet master batch. Said master batch is used as a main component to obtain the desired rubber compsn.

公开(公告)号：JPH0518339B2

公开(公告)日：1993-03-11

申请号：JP14983185

申请日：1985-07-08

Applicant: BRIDGESTONE CORP

Inventor： TAKESHITA MICHITAKA ,  KIURA MITSUO ,  ITO SEISHIRO ,  IHARA TATSUHIKO

IPC: C08L7/00 ,  B60C1/00 ,  C08K3/04 ,  C08K9/00 ,  C08L21/00 ,  C08L23/00 ,  C08L33/00 ,  C08L33/02 ,  C08L101/00 ,  C09C1/56 ,  C09C3/04

公开(公告)号：JPS6218446A

公开(公告)日：1987-01-27

申请号：JP14983185

申请日：1985-07-08

Applicant: BRIDGESTONE CORP

Inventor： TAKESHITA MICHITAKA ,  KIBOKU MITSUO ,  ITO SEISHIRO ,  IHARA TATSUHIKO

IPC: C08L7/00 ,  B60C1/00 ,  C08K3/04 ,  C08K9/00 ,  C08L21/00 ,  C08L23/00 ,  C08L33/00 ,  C08L33/02 ,  C08L101/00 ,  C09C1/56 ,  C09C3/04

Abstract: PURPOSE:To improve the dispersibility of carbon black without retarding the rate of cure, by blending a low-temperature plasma-treated reinforcing carbon black with a rubber component. CONSTITUTION:30-150pts.wt. reinforcing carbon black (A) is blended with 100pts.wt. rubber component (B). Component B is a rubber component selected from among natural rubber, synthetic isoprene rubber or their mixture or a mixture of said rubber component and at least one other synthetic diene rubber. Component A is carbon black having a nitrogen adsorption surface area of 70-200m /g and a DBP value of 80-130ml/100g, obtd. by treating carbon black with low-temperature plasma to introduce either phenolic hydroxyl groups or both carboxyl groups and phenolic hydroxyl groups into the surface of carbon black and then neutralizing said acidic group. Pref. the concn. of the phenolic hydroxyl group introduced into the surface of carbon black is 0.1meq/g or above and the concn. of the carboxyl group is 0.15meq/g or below.