METHOD OF PREPARING PEROXIDIZED MINERAL FILLERS FOR POLYMERS

摘要

According to the invention, the method for producing mineral polymer fillers containing graft hydroperoxide groups consists in treating mineral fillers at a temperature of 50 DEG to 150 DEG C. and a pressure of 1.33.102 to 4.105 Pa (1 mm Hg to 4 atm) with organosilicon compounds of the general formula: R4-ySiXy or R'R3-zSiXz, where R is vinyl, allyl or norbornyl, X is chlorine, alkoxy or acyloxy, y=1-3, z=1-2, R' is methyl, ethyl or propyl, whereupon 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 percent by volume of ozone at a temperature of -20 DEG C. to +20 DEG C. in an aliphatic saturated monohydric alcohol or aliphatic saturated monohydric acid. The method for producing mineral polymer fillers containing graft hydroperoxide groups is quite simple and makes it possible to carry out the filling and grafting of polymers at a reduced temperature of 50 DEG to 140 DEG C.