Other

Stuart Keeping

Daniel J Halloran

Brett Lee Zimmerman

An emulsion containing particles of an organopolysiloxane is prepared by (i) combining a silanol endblocked siloxane, an alkyltrialkoxysilane, water, and a nonionic surfactant or an anionic surfactant; (ii) emulsifying these ingredients by agitating these ingredients or by using a high shear device; (iii) adding a condensation specific acid catalyst to the emulsion; (iv) polymerizing the catalyzed emulsion to form an organopolysiloxane polymer; and (v) continuing polymerizing step (iv) until the resulting organosiloxane polymer has the desired viscosity. Organosiloxane polymers exhibiting improved release properties can be obtained by using alkyltrialkoxysilanes R&prime;Si(OR&Prime;),where R&prime; and R&Prime; each represent alkyl groups, and R&prime; contains at least eight, preferably at least twelve, and most preferably at least sixteen or more carbon atoms.

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Overijse, Belgium

Stuart Keeping