OIL-RESISTANT COMPOSITION OF RUBBER-MODIFIED POLYSTYRENE AND A METHOD FOR PREPARATION THEREOF Russian patent published in 2004 - IPC

FIELD: polymer materials. SUBSTANCE: composition containing polybutadiene particles with mean-volume diameter 6 to 13 mcm and dispersed in polystyrene is characterized by content of gel from 25 to 35 wt %, degree of swelling from 13 to 22, residual content of volatile components 2000 ppm or less, total amount of styrene dimer and styrene trimer 8000 ppm or less, and can be prepared by polymerization of styrene in presence of polybutadiene rubber by foaming resulting solution, heating solution in tubular heater, and finally removing unreacted monomer and solvent in separator. EFFECT: developed oil-resistant composition with reduced content of residual substances and styrene dimers and trimers. 20 cl, 1 dwg, 1 tbl, 2 ex