Method of manufacturing silicone emulsions

U.S. Patent Number: 5302658

Abstract: A method is described for making an emulsion in which a mixture is formed containing a polysiloxane and a primary nonionic surfactant having an HLB value of 10 to 19. There is added to the mixture a first portion of surfactant free water gradually in a series of separate incremental steps. This is followed by the addition to the mixture of a secondary nonionic surfactant having an HLB value of 1.8-15. The mixture is stirred until the particle size of the polysiloxane in the mixture is in the range of 1-100 microns. A second portion of water is added to the mixture in an amount sufficient to provide a total content of water in the product of 25-65 percent by weight.

Inventors: Gee; Ronald P. (Midland, MI); Varaprath; Padmakumari J. (Midland, MI)

Assignee: Dow Corning Corporation (Midland, MI)

Application Number: 07/913,555

Issued: 1994-04-12

Expired: 2006-04-12

Classes: 524/732 ; 106/287.13; 106/287.14; 514/941; 516/76; 524/837

Field of search: 524/837,732 252/312,314 106/287.13,287.14 514/941

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