Patent ID: 6841606

Claim:
A method for producing a natural rubber master batch, which comprises a step for cleaving amide linkages in a natural rubber latex; and a step for mixing the latex, wherein the latex contains non-rubber components and the amide linkages have been cleaved in the previous step, with an aqueous slurry having been dispersed with at least one filler selected from the group consisting of carbon black, silica and an inorganic filler represented by the following Formula I: nM 1 .x SiO y .zH 2 O (I) wherein M 1 is at least one member selected from the group consisting of metals of aluminum, magnesium, titanium, calcium and zirconium, oxides of the preceding metals, hydroxides of the preceding metals, hydrates of the preceding oxides and hydroxides, and carbonates of the preceding metals; n is an integer of 1 to 5; x is an integer of 0 to 10; y is an integer of 2 to 5; and z is an integer of 0 to 10.