Patent ID: 6316541
Filing Date: 2001-11-13
Classification: C08G

Abstract:
A method for producing stable, oil free polysiloxane emulsions comprising the steps of:(I) preparing a mixture (I) by mixing(a) a cyclicsiloxane, or a mixture of cyclicsiloxanes,(b) a nonionic surfactant, or a mixture of nonionic surfactants,(c) an ionic surfactant, or a mixture of ionic surfactants, and(d) water(II) adding to the mixture (I) with stirring and heating,(e) a condensation polymerization catalyst; and(III) agitating the mixture (I) and catalyst at a polymerization reaction temperature until essentially all cyclicsiloxane is reacted, whereby a stable, oil-free emulsion is formed; and wherein said cyclicsiloxane or mixture of cyclicsiloxanes have not been mechanically pre-emulsified prior to the addition into the mixture (I) and prior to catalyzing.