METHOD OF PREPARING PEROXIDIZED MINERAL FILLERS FOR POLYMERS

摘要

The process for producing mineral fillers with graft peroxy groups for polymers according to the present invention comprises treatment of mineral fillers, at a temperature of from 50 to 150 DEG C. under a pressure of from 1.33.102 to 4.105 Pa (lmmHg to 4 atm), with an organosilicon compound of the formula: R4-ySiXy or R'R3-zSiXz, wherein R is vinyl, allyl, norbornyl, X is chlorine, an alkoxy or acyloxy, y=1-3, z=1-2, R' is methyl, ethyl, propyl, whereafter the mineral filler containing graft unsaturated groups is separated from the reaction mixture, dried and ozonized with an ozone-oxygen mixture containing 4 to 6 vol.% of ozone at a temperature of from -40 DEG to +20 DEG C. The process for producing mineral fillers with graft peroxy groups for polymers is technologically simple and makes it possible to perform extending and grafting of a polymer at lower temperatures (50 DEG -140 DEG C.).