Method of preparing organosilicon graft polymers

Claim 1

A PROCESS FOR PRODUCING GRAFT POLYMERS WHICH COMPRISES HOMOGENEOUSLY DISPERSING AND SUSPENDING A FINELY DIVIDED INORGANIC SOLID HAVING AN AVERAGE PARTICLE SIZE OF FROM 0.005 TO 5 MICRONS IN DIAMETER THROUGHOUT A MIXTURE OF (1) AN ORGANOPOLYSILOXANE HAVING AT LEAST ONE ALKYL RADICAL ATTACHED TO SI BY SI-C LINKAGE PER MOLECULE, SAID RADICAL HAVING LESS THAN 5 CARBON ATOMS THEREIN AND SAID ORGANOPOLYSILOXANE BEING ESSENTIALLY FREE OF ORGANIC RADICALS HAVING ALIPHATIC UNSATURATION, AND (2) AN OLEFINIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF (A) OLEFINIC HYDROCARBONS, (B) HALOGENATED OLEFINIC HYDROCARBONS, (C) ALKENYL ALCOHOLS, (D) ALKENYL AMINES, (E) ALKENYL NITRILES, (F) ALKENYL AMIDES, (G) ETHYLENICALLY UNSATURATED MONO- AND DISCARBOXYLIC ACIDS, (H) ALKENYL ESTERS OF SATURATED MONO- AND DICARBOXYLIC ACIDS, AND (I) ALKYL ESTERS OF ETHYLENICALLY UNSATURATED MONO- AND DICARBOXYLIC ACIDS, THE COMPOUNDS (G), (H) AND (I) EACH CONSISTING OF CARBON, HYDROGEN AND CARBOXYLIC OXYGEN ATOMS, AND THEN EXPOSING THE DISPERSION TO THE ACTION OF A FREE RADICAL GENERATOR UNDER CONDITIONS SUCH THAT FREE RADICALS ARE GENERATED, THE AFORESAID FINELY DIVIDED INORGANIC SOLID BEING SELECTED FROM THE GROUP CONSISTING OF (A) SILICA, (B) SILICA-METAL OXIDE MIXED GELS, (C) MINERAL SILICATS, (D) SALIDES OF LI, NA, K, CS, RB, BA, CD, SR, MG AND ZN, (E) SELENIDES, SULFIDES, AND TELLURIDES OF K, NA, LI, MG, CA, SR, AND BA, AND (F) OXIDES OF MG, CA, SR, AND BA.