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US5045592A
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Metastable silane hydrolyzates
Assignee: Dow Silicones Corp
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Filing: 1990-10-01
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Granted: 1991-09-03
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Expires: 2010-10-01
Abstract
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° to 1000° C. to form ceramic or ceramic-like coatings on such substrates.
Inventors
- 👤 Keith D. Weiss
- 👤 Cecil L. Frye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:40
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/06; C08G77/045; C08G77/08; C08G77/14; C08G77/16
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
70 words
A stable silane hydrolyzate solution comprising: a non-sulfur containing polar organic solvent containing therein a composition of the formula (RSi(OH) x O 3-x/2 ) n where R is hydrogen or a methyl, provided R is at least 50% hydrogen, 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 2
Dependent Claim
70 words
A stable silane hydrolyzate solution comprising: a non-sulfur containing polar organic solvent containing therein a composition of the formula (RSi(OH) x O 3-x/2 ) n where R is hydrogen or a methyl, provided R is at least 50% hydrogen, 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 3
Dependent Claim
11 words
The hydrolyzate solution of claim 1 in which R is hydrogen.
Claim 4
Dependent Claim
16 words
The hydrolyzate solution of claim 1 in which the chloride content is less than 500 ppm.
Claim 5
Dependent Claim
25 words
The hydrolyzate solution of claim 1 in which the concentration of said hydrolyzate in the solvent is from about 1 to about 25% by weight.
Claim 6
Dependent Claim
24 words
The solution of claim 1 in which said organic polar solvent is selected from the groups consisting of keytones, esters, ethers, and mixtures thereof.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-02 | 1995-03-04 | 1995-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-02 | 1999-03-04 | 1999-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-02 | 2003-03-04 | 2003-09-03 | $7700.00 | Window Closed / Lapsed |