Process for making silicone emulsions
AssigneeDow Corning Corporation
InventorsSerge Creutz, Dimitri Latour, Henri Schirosi, Karin Dubois, Didier Vanderveken
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Abstract
In a process for the production of a silicone in water emulsion in which a polysiloxane fluid, at least one surfactant and water are continuously fed to a high shear mixer in such proportions as to form a viscous oil in water emulsion which is continuously withdrawn from the mixer. The polysiloxane fluid may be a non-reactive fluid or may have reactive groups capable of taking part in a chain extension reaction. A desired emulsion particle size can be maintained by monitoring the pressure in the supply line at the inlet to the high shear mixer.
Claims13
A process for the production of a silicone in water emulsion in which a silanol-functional polydiorganosiloxane fluid, at least one surfactant and water are continuously fed to a high shear mixer in such proportions as to form a viscous oil in water emulsion which is continuously withdrawn from the mixer, characterised in that the silanol-functional polydiorganosiloxane fluid is contacted successively with an ionic surfactant and then with a non-ionic surfactant before being fed to the high shear mixer.
Dependencies are inferred from the claim text.