Oil-in-water emulsion
AssigneeDow Corning Corporation
InventorDipak Narula
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Abstract
Oil-in-water emulsions are provided by a process which involves the mixing of the oil and water in the presence of three nonionic surfactants having certain HLB values. The process is particularly useful for emulsifying an oil having a viscosity exceeding 50,000 centipoise (50 pascal-seconds). Any oil can be emulsified by this process, including hydrocarbon oils like mineral oil and petrolatum, and silicones, including fluids, gums and resins. A particularly useful emulsion prepared by this process is an emulsion of a bi-modal silicone which contains substantial amounts of a volatile silicone and a silicone gum.
Claims23
An oil-in-water emulsion composition consisting essentially of 100 parts by weight of a water-insoluble oil, at least 0.05 millimol of a nonionic tertiary surfactant having an HLB number of at least 16, at least 3 millimols of a nonionic primary surfactant having an HLB number of from 13 to 15, from 1 to 5 millimols, per millimol of said primary surfactant, of a nonionic secondary surfactant having an HLB number of from 7 to 9, and at least 10 parts by weight of water.
An oil-in-water emulsion composition according to containing from 15 to 45 parts by weight of water and wherein the water-insoluble oil has a viscosity of greater than 50 pascal-seconds at 25.degree. C.
Dependencies are inferred from the claim text.