High purity alkoxytrimethylsilane fluids
AssigneePCR, Inc.
InventorsGary E. LeGrow, William I. Latham, III
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Abstract
The invention provides high purity alkoxytrimethylsilane fluids of the general formula ROSiMe.sub.3 wherein Me is methyl and R is a monovalent aliphatic hydrocarbon substituent which ranges from 14 to about 20 carbons, the fluid being substantially free of organic and inorganic contaminants, wherein the alkoxytrimethylsilanes are produced by a novel process, and can be readily incorporated into cosmetic formulations containing organic components without heating and provide improved sensory characteristics compared to those provided by the corresponding alcohols.
Claims19
A process for the production of a high purity liquid alkoxytrimethylsilane of the general formula:
- ROSiMe.sub.3
- wherein Me is methyl, and R is a monovalent aliphatic hydrocarbon substituent having from about 14 to about 20 or more carbon atoms, said fluid being substantially free of organic and inorganic compounds, said process comprising the steps of:
- (a) melting a solid alcohol of the general formula R--OH wherein R is as defined above;
- (b) catalyzing said molten alcohol with an effective amount of an organic superacid;
- (c) reacting said catalyzed molten alcohol at a temperature ranging from about 10.degree. C. above the melting point of said alcohol to about 100.degree. C. in an inert, essentially anhydrous atmosphere with at least a stoichiometric equivalent amount of a trimethylsilylating agent;
- (d) removing any reaction by-product and excess trimethylsilylating agent;
- (e) neutralizing the organic superacid catalyst with an excess of an anhydrous base;
- and
- (f) removing salts from said liquid alkoxytrimethylsilane by filtration.
A high purity, neutral, colorless, and odorless liquid alkoxytrimethylsilane of the general formula:
- ROSiMe.sub.3
- wherein Me is methyl, and R is a monovalent aliphatic hydrocarbon substitutent having from about 14 to about 20 or more carbon atoms, said fluid being substantially free of organic and inorganic compounds.
Dependencies are inferred from the claim text.