Patent ID: 8653214

Claim:
A process for preparing silicone (meth)acrylate particles comprising: a) obtaining an emulsion composed of water and an organic phase, said organic phase comprising at least one organopolysiloxane which has been modified terminally and/or laterally with (meth)acrylate groups and is of the general formula (I) or mixtures thereof where R 1 =identical or different radicals selected from linear or branched, saturated, monounsaturated or polyunsaturated, linear, cyclic or branched alkyl, alkoxy, polyalkoxy, hydroxyalkyl, hydroxyalkoxy, alkenyl, aryl, aryloxy, hydroxyaryl, hydroxyaryloxy, alkaryl, alkaryloxy, hydroxyalkaryl, hydroxyalkaryloxy, aralkyl, aralkoxy, hydroxyaralkyl or hydroxyaralkoxy radicals which optionally contain one or more ether or ester bridges and have 1 to 20 carbon atoms, R 2 =identical or different divalent, optionally OH-functionalized hydrocarbon radicals which optionally contain one or more ether or ester bridges, are bonded to the silicon atom via an Si—C linkage or an Si—O—C linkage, have 1 to 20 carbon atoms and to which are bonded, via ester bonds, 1 to 5 acrylic acid and/or methacrylic acid units and optionally monocarboxylic acid units having 2 to 10 carbon atoms, which are free of double bonds capable of polymerization, R 3 =identical or different R 1 or R 2 radicals, a=0 to 1000, b=0 to 200, c=0 to 200, a d =0 to 1000, b d =0 to 200, where when c>0, at least one of a d and b d are >0, with the proviso that when b and c=0, R 3 must not be selected from the same group as R 1 , with addition of at least one particulate emulsifier, where the organic phase forms an inner phase of the emulsion, and b) polymerizing the inner phase to completion in the presence of a free-radical initiator which is added to an outer aqueous phase of the emulsion in a concentration of 0.1 to 40% by weight based on the inner phase.