US Patent No. 9,487,047

OIL-EXTENDED NATURAL RUBBER AND METHOD FOR PRODUCING THE SAME AND RUBBER COMPOSITION AND TIRE USING THE SAME


Patent No. 9,487,047
Issue Date November 08,2016
Title Oil-extended Natural Rubber And Method For Producing The Same And Rubber Composition And Tire Using The Same
Inventorship Hajime Kondo, Tokyo (JP)
Assignee BRIDGESTONE CORPORATION, Tokyo (JP)

Claim of US Patent No. 9,487,047

1. An oil-extended natural rubber formed by adding an emulsified extension oil to a natural rubber latex, coagulating a mixture
of the natural rubber latex and the emulsified extension oil, and drying only a resulting coagulum,
wherein a weight average molecular weight as converted to polystyrene of a dry rubber component is not less than 1,500,000,
and

wherein an aniline point of the extension oil is 85-100° C.