Patent ID: 9290634
Filing Date: 2016-03-22
CPC Classification: B60C,C08C,C08J,C08K,C08L

Claim Text:
1. A process for producing an unvulcanized rubber composition comprising a rubber wet master batch yielded by using, as raw materials, at least a filler, a dispersing solvent and a rubber latex solution, the rubber latex solution comprising two or more rubber latex solution species different from each other, and the process comprising a step (I) of dispersing the filler into the dispersing solvent to produce a filler-containing slurry solution, a step (II) of mixing the filler-containing slurry solution with the rubber latex solution to produce a filler-containing rubber latex solution, and a step (III) of coagulating and drying the filler-containing rubber latex solution to produce the rubber wet master batch, wherein the step (I) is a step (I-(a)) of adding, when the filler is dispersed into the dispersing solvent, at least one portion of the rubber latex solution to the filler and/or the dispersing solvent to produce the filler-containing slurry solution wherein rubber latex particles adhere to the filler, and wherein the step (I-(a)) is a step of mixing at least one portion of the rubber latex solution beforehand with the dispersing solvent, and then adding the filler to the mixture to be dispersed therein, thereby producing the filler-containing slurry solution, wherein the rubber latex particles adhere to the filler.