Title:
PRODUCTION OF NATURAL RUBBER COMPOSITION
Document Type and Number:
Japanese Patent JP3731984
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain the subject composition high in productivity and workability and capable of improving the physical properties of a (un)vulcanized rubber by employing a specific kneading method, a specific compounding method and the like.
SOLUTION: This method for producing a natural rubber composition comprises kneading a rubber component containing TSR (technical standard rubber) natural rubber for a prescribed time in the first step for mechanically kneading the rubber component, and subsequently adding a filler and other rubber chemicals to the kneaded product and kneading the mixture to obtain the rubber composition containing the TSR natural rubber in the second step. Therein, in the first step, 100 pts.wt. of the rubber component is mixed with 0-10 pts.wt. of carbon black among 30-90 pts.wt. of all fillers to be compounded and with 0-2 pts.wt. of an antioxidant among 0-10 pts.wt. of all antioxidants and subsequently kneaded. Thereby, polymer gels contained in the TSR natural rubber can be reduced to provide the objective composition.
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Inventors:
Kano
Yoshihiro Makino
Ohara Masashi
Yoshihiro Makino
Ohara Masashi
Application Number:
JP24132697A
Publication Date:
January 05, 2006
Filing Date:
September 05, 1997
Export Citation:
Assignee:
Bridgestone Corporation
International Classes:
C08J3/20; C08L7/00; C08L21/00; (IPC1-7): C08J3/20; C08L7/00; C08L21/00
Domestic Patent References:
| JP7144321A |
Other References:
ゴム技術の基礎,日本,社団法人 日本ゴム協会,1977年 4月 1日,第150頁
Attorney, Agent or Firm:
Eisuke Fujimoto
Masayoshi Kanda
Masayoshi Kanda