| 摘要 |
The present invention relates to water-free, co-solvent free, stable dispersions of certain polydimethylsiloxanes in certain nonionic, polyoxamer surfactants; wherein: a) the dispersed polydimethylsiloxanes, esp. those having the chemical composition (CH3)3SiO¢SiO(Ch3)2!nSi(Ch3)3 wherein n is a whole number from between about 10 and about 400, which are insoluble in the surfactant, esp. a nonionic surfactant of the polyoxyethylene-polyoxypropylene block copolymer type, are oriented by the surfactant such that when dispersed in water they are particularly adept at forming oriented, monolayer coatings on various substrates, and b) the particle size of the dispersed polydimethylsiloxane is from between about 0.5 and about 10 microns, with a particle size distribution such that from between about 80 and 95 % of the dispersed polydimethylsiloxane is within this particle size range. These stable dispersions are described as ultramulsions, which, together with their physical properties (stable when dispersed in water), distinguishes them from emulsions, microemulsions and solutions, and are useful in various products, such as mouthrinses, toothpastes, confectioneries, antacids, mold/release lubricants, plasticizers, cleaners, cosmetics and skin care products.
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