EP0410564A2
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EP
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Metastable silane hydrolyzate solutions and process for their preparation
Assignee: Dow Silicones Corp
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Filing: 1990-06-06
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Granted: —
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Expires: 2010-06-06
Abstract
Abstract The present invention provides a relatively simple synthesis procedure for the formation of silane hydrolyzate compositions of the formula <CHEM> 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 to 1000 DEG C. to form ceramic or ceramic-like coatings on such substrates.
Inventors
- 👤 Keith Daren Weiss
- 👤 Cecil Leonard Frye
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 18:06
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/045; C08G77/06; C08G77/08; C08G77/14; C08G77/16; C09; C09D; C09D183/00; C09D183/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
102 words
A method for the preparation of a silane hydrolyzate of the formula 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.
Claim 2
Independent Claim
102 words
A method for the preparation of a silane hydrolyzate of the formula 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.
Claim 3
Dependent Claim
25 words
The method of claim 1 in which said metal oxide is selected from the group consisting of CuO, ZnO, MgO, CaO, Cu₂O and mixtures thereof.
Claim 4
Dependent Claim
26 words
The method of claim 1 in which said non-sulfur containing organic polar solvent is selected from the group consisting of ketones, esters ethers and mixtures thereof.
Claim 5
Dependent Claim
27 words
The method of claim 1 in which the concentration of said hydrolyzate in solution with said solvent is from about 1 to about 25 % by weight.
Claim 6
Dependent Claim
37 words
The method of claim 1 in which said hydrolyzate is a copolymer containing both hydrogen and methyl groups and the mole ratio of said hydrogen groups to said methyl groups is equal to or greater than one.
Claim 7
Dependent Claim
9 words
A product produced by the process of claim 1.
Claim 8
Dependent Claim
58 words
A stable silane hydrolyzate solution comprising a non-sulfur containing polar organic solvent containing therein a composition of the formula 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, and where the silanol content in said composition is from about 1-10% by weight.
Claim 9
Dependent Claim
58 words
A stable silane hydrolyzate solution comprising a non-sulfur containing polar organic solvent containing therein a composition of the formula 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, and where the silanol content in said composition is from about 1-10% by weight.
Claim 10
Dependent Claim
11 words
The hydrolyzate solution of claim 7 in which R is hydrogen.
Claim 11
Independent Claim
95 words
A method for the formation of a protective coating of a silsesquioxane resin on a substrate comprising the steps of: a) coating said substrate with a solution comprising a non-sulfur containing polar organic solvent containing therein a composition of the formula 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 and where the silanol content in said composition is from about 1-10% by weight, and b) evaporating said solvent and thereby deposit an insoluble silsesquioxane coating on said substrate.
Claim 12
Independent Claim
95 words
A method for the formation of a protective coating of a silsesquioxane resin on a substrate comprising the steps of: a) coating said substrate with a solution comprising a non-sulfur containing polar organic solvent containing therein a composition of the formula 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 and where the silanol content in said composition is from about 1-10% by weight, and b) evaporating said solvent and thereby deposit an insoluble silsesquioxane coating on said substrate.
Claim 13
Independent Claim
121 words
A method for the formation of a ceramic or ceramic-like coating on a substrate comprising the steps of: a) coating said substrate with a solution comprising a non-sulfur containing polar organic solvent containing therein a composition of the formula 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 and where the silanol content in said solvent is from about 1-10% by weight b) evaporating said solvent and thereby deposit an insoluble silsesquioxane coating on said substrate, and c) converting said silsesquioxane coating to a silicon dioxide-containing ceramic by subjecting said coating to an oxidizing atmosphere at a temperature of between about 100°C to about 1000°C.
Claim 14
Independent Claim
121 words
A method for the formation of a ceramic or ceramic-like coating on a substrate comprising the steps of: a) coating said substrate with a solution comprising a non-sulfur containing polar organic solvent containing therein a composition of the formula 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 and where the silanol content in said solvent is from about 1-10% by weight b) evaporating said solvent and thereby deposit an insoluble silsesquioxane coating on said substrate, and c) converting said silsesquioxane coating to a silicon dioxide-containing ceramic by subjecting said coating to an oxidizing atmosphere at a temperature of between about 100°C to about 1000°C.
References Cited (Backward Citations)
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