Process for the synthesis of multi-modal aqueous dispersions of polysiloxanes
AssigneeGeneral Electric Company
InventorsDaniel Horace Craig, Wayne Francis Morgan
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Abstract
A process for the acid-catalyzed synthesis of polysiloxane emulsions is discussed. The process comprises preheating an aqueous reaction mixture, optionally comprising polysiloxane emulsion seeds, and optionally containing a surfactant, to a temperature of up to about 110.degree. C. and adding to the aqueous reaction mixture, water, an acid catalyst surfactant, and a polysiloxane precursor to form a polysiloxane emulsion comprising essentially multi-modal, optionally multi-layered particles having desired multi-modal particle sizes in a range of from about 100 nm to about 2 microns.
Claims10
A process to make polysiloxane emulsions, comprising:
- (a) preheating an aqueous reaction mixture (A), optionally comprising polysiloxane emulsion seeds, and optionally containing a surfactant, to a temperature of up to about 100.degree. C.;
- and
- (b) concurrently adding to the aqueous reaction mixture (A), a mixture (B) comprising water, an acid catalyst surfactant, and a polysiloxane precursor to form a polysiloxane emulsion comprising multi-modal, optionally multi-layered particles having desired multi-modal particle size in the range of from about 100 nm to about 2 microns.
Dependencies are inferred from the claim text.