Patent ID: 6706811
Filing Date: 2004-03-16
Classification: C08K

Abstract:
A method for the preparation of an aqueous emulsion of an organopolysiloxane having long-chain alkyl groups of at least 12 carbon atoms bonded to the silicon atoms, which comprises the steps of:(a) dispersing and emulsifying an organohydrogenpolysiloxane having at least one hydrogen atom directly bonded to the silicon atom and an &agr;-olefin compound represented by the general formula CH2&boxH;CHâ€”CpH2p+1, in which the subscript p is a positive integer not smaller than 10, jointly in an aqueous medium containing a surface active agent to give a primary aqueous emulsion; (b) admixing the primary aqueous emulsion with a catalytically effective amount of a platinum compound; and (c) heating the primary aqueous emulsion under agitation to effect hydrosilation reaction between the silicon-bonded hydrogen atoms in the organohydrogenpolysiloxane and the ethylenically unsaturated bonds in the &agr;-olefin compound.