Modified natural rubber and method of manufacturing the same, rubber composition and tire
AssigneeBridgestone Corporation
InventorsTaku YAMAMOTO, Haruki Minojima, Takeshi Kasai
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Abstract
The present invention provides a modified natural rubber that offers higher efficiency of graft polymerization or attachment of a polar group-containing compounds, and that possesses excellent low loss factor, wear resistance and fracture resistance when used as a rubber composition, a rubber composition using the modified natural rubber and a tire using the rubber composition. In the present invention, a polar group-containing compound is graft polymerized or attached under mechanical shear force to a natural rubber raw material having a nitrogen content of 0.4 mass % or less.
Claims10
A modified natural rubber formed by graft polymerizing or attaching a polar group-containing compound to at least one natural rubber raw material selected from the group consisting of natural rubber, a natural rubber latex coagulation and a natural rubber cup lump under mechanical shear force,
- wherein the natural rubber raw material has a nitrogen content of 0.4 mass % or less.
A method of manufacturing a modified natural rubber, comprising:
- graft polymerizing or attaching a polar group-containing compound to at least one natural rubber raw material selected from the group consisting of natural rubber, a natural rubber latex coagulation and a natural rubber cup lump under mechanical shear force,
- wherein the natural rubber raw material has a nitrogen content of 0.4 mass % or less.
Dependencies are inferred from the claim text.