METHOD OF EXTRACTING BUTADIENE-STYRENE RUBBER FROM LATEX Russian patent published in 2013 - IPC C08C1/15 C08F236/10 

FIELD: chemistry.

SUBSTANCE: invention relates to petrochemical industry, particularly production of butadiene-styrene rubber obtained by emulsion (co)polymerisation. The method of extracting butadiene-styrene rubber from latex by coagulation using a combined coagulating agent containing poly-N,N-dimethyl-N,N-diallylammonium chloride (PDMDAAC) and fibre material, with the following weight ratio of components, with respect to dry substance: fibre material:PDMDAAC=1:(0.020-1.2), followed by acidation of serum with a mineral acid, separating and drying the rubber crumbs. The fibre material used can be material made of natural, artificial and synthetic fibres.

EFFECT: invention provides complete coagulation of latex while reducing consumption of poly-N,N-dimethyl-N,N-diallylammonium chloride and without introducing mineral salts into the system, and also enables to obtain a product with improved physical and mechanical properties.

2 cl, 2 tbl