Patent ID: 8580729

Claim:
A method for controlling the release of an active material selected from perfumes, sunscreens, antioxidants, vitamins, drugs, biocides, pest repellents, catalysts, natural extracts, peptides, warming effect and cooling agents, from a composition containing an organopolysiloxane, the method comprising: forming a dispersion by polymerizing the organopolysiloxane in the presence of a wax to form siloxane bonds; and incorporating the active material into the dispersion, wherein the organopolysiloxane a. is a substantially linear organopolysiloxane containing at least one hydroxyl or hydrolysable group bonded to silicon and is polymerized by catalysed condensation of the hydroxyl or hydrolysable groups to form siloxane bonds, b. comprises a cyclic organopolysiloxane and is polymerized by a catalysed process of ring opening of the cyclic organopolysiloxane to form siloxane bonds, or c. is a mixture of a substantially linear organopolysiloxane containing at least one hydroxyl or hydrolysable group bonded to silicon and an alkoxysilane having an average of more than two alkoxy groups per molecule, and is polymerized by catalysed siloxane condensation of the substantially linear organopolysiloxane with the alkoxysilane to form a branched organopolysiloxane structure.