Metastable silane hydrolyzates and process for their preparation
AssigneeDow Corning Corporation
InventorsKeith D. Weiss, Cecil L. Frye
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Abstract
The present invention provides a relatively simple synthesis procedure for the formation of silane hydrolyzate compositions of the formula ##EQU1## where R is hydrogen or a methyl group, n is an integer greater than about 8, and x is a number between 0 and 2. The hydrolyzate compositions are metastable in solvent solution but become insoluble after coating on a substrate. The resins are useful as planarizing coatings for substrates such as electronic devices and can be ceramified by subjecting them to an oxidizing atmosphere at a temperature of between about 100.degree. to 1000.degree. C. to form ceramic or ceramic-like coatings on such substrates.
Claims5
A method for the preparation of a silane hydrolyzate of the formula ##EQU6## where R is hydrogen or a methyl group, n is an integer greater than about 8, and x is a number between 0 and 2, comprising the steps of:
- (a) adding to a non-sulfur containing polar organic solvent a trichlorosilane, an effective amount of water or hydrochloric acid, and at least a substantially stoichiometric amount of a metal oxide to form a reaction mixture, and
- (b) reacting said reaction mixture to form a soluble silane hydrolyzate and a metal chloride;
- and
- (c) removing said metal chloride from said silane hydrolyzate.
Dependencies are inferred from the claim text.