SILICONIDE DIOXIDE MIXTURE, PREPARED FROM EMULSION AND SOLUBLE RUBBER Russian patent published in 2017 - IPC C01B33/12 

FIELD: chemistry.

SUBSTANCE: silicon dioxide rubber masterbatch contains hydrophobised silica, solution rubber and emulsion rubber. The method comprises hydrophobizing the silica by dissolving the trimethoxysilane coupling agent in a mixture of alcohol, acid and water to form a trimethoxysilane binder solution that contains about 75 wt % of water, mixing a solution of the trimethoxysilane coupling agent with silica and adding a base to raise the pH to obtain a compatibilized silica slurry, wherein the trimethoxysilane coupling agent is 3-mercaptopropyltrimethoxysilane, bis (3-trimethoxysilylpropyl) disulfide, bis-(3-trimethoxysilylpropyl)-tetrasulfide or trimethoxysilane, further manufacture of polymer latex, mixing the compatibilized silica slurry with the polymer latex, coagulating the polymer latex, and isolating the first rubber filled with silica, wherein either the solution rubber made by the solution method in an organic solvent is mixed with a polymer latex with a compatibilized silica slurry, or a first rubber filled with dioxide Silicon are added to the manufacturing process of the solution rubber to produce a second rubber filled with silica and where as the first A second rubber filled with silicon dioxide, and a second rubber filled with silica contains a mixture of silica, emulsion rubber and solution rubber.

EFFECT: economical preparation of rubber masterbatch, uniform mixing of hydrophobized silica with rubber and preparation of vulcanizate with acceptable properties.

35 cl, 12 tbl, 7 ex