Patent Number: 6,841,606

Title: Natural rubber master batch, production method thereof, and natural rubber composition

Abstract: The natural rubber master batch of the present invention is prepared by mixing a natural rubber latex having its amide linkages cleaved and an aqueous slurry having a filler dispersed in water. Alternatively, the natural rubber master batch is prepared by a method including a step for mixing a natural rubber latex and an aqueous slurry containing dispersed fillers having a specific particle size distribution and a limited range of 24M4DBP absorption. The natural rubber composition of the present invention is prepared by compounding natural rubber, which contains non-rubber components prepared by cleaving amide linkages of natural rubber latex, with silica and/or a particular inorganic filler.

Inventors: Yanagisawa; Kazuhiro (Tokyo, JP), Someno; Kazuaki (Tokyo, JP), Mukai; Uchu (Tokyo, JP)

Assignee: Bridgestone Corporation

International Classification: C08J 3/22 (20060101); C08J 3/20 (20060101); C08C 1/00 (20060101); C08C 1/04 (20060101); C08J 3/215 (20060101); C08K 003/18 ()

Expiration Date: 01/11/2022