FILLED BUTADIENE-STYRENE RUBBER MANUFACTURING PROCESS Russian patent published in 2007 - IPC C08C1/14 C08F2/22 C08F236/10 

FIELD: rubber industry.

SUBSTANCE: invention relates to production of butadiene-styrene rubbers obtained via emulsion (co)polymerization, in particular to methods for isolation thereof out of latexes. A process for manufacturing filled butadiene-styrene rubber is described comprising butadiene-styrene copolymerization in emulsion in presence of radical initiators, stopping the process, adding filler and antioxidant, and degassing and isolating rubber out of latexes utilizing coagulation technique. Process is characterized by that, as filler and antioxidant, fiber-polymer-antioxidant composite is used, obtained by preliminarily mixing milled garneted fibers with hydrocarbon solution of a low-molecular weight polymer material. The latter is prepared on the basis of (i) still residue of recycled solvent (toluene) purification process in production of polybutadiene rubber and (ii) styrene containing amine- or phenol-type antioxidant. Thus obtained composite is grinded and dispersed in surfactant-containing aqueous phase, after which low-boiling hydrocarbon fraction is distilled off and low-molecular weight polymer material and fibrous filler are added in amounts, respectively, 2-6 and 0.1-1.0% based on the weight of rubber.

EFFECT: reduced loss of rubber and environmental pollution at higher physicochemical characteristics of vulcanizates.

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