US4694040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid composition for forming a coating film of organopolysiloxane and method for the preparation thereof
Assignee: Tokyo Denshi Kagaku KK
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Filing: 1986-08-25
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Granted: 1987-09-15
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Expires: 2006-08-25
Abstract
Abstract The invention provides a novel means for providing a highly heat-resistant and corrosion-resistant coating film on the surface of a substrate such as a semiconductor silicon wafer or glass plate by coating the surface with a liquid coating composition which is a solution of an oligomeric organopolysiloxane as a partial dehydration-condensation product of a monohydrocarbylsilane triol RSi(OH) 3 , optionally, with admixture of a dihydrocarbylsilane diol R 2 Si(OH) 2 , R being a monovalent hydrocarbon group, e.g. methyl or phenyl, in an organic solvent followed by baking of the coated substrate to convert the coating layer into a cured resin film.
Inventors
- 👤 Akira Hashimoto
- 👤 Toshihiro Nishimura
- 👤 Muneo Nakayama
- 👤 Hisashi Nakane
- 👤 Shozo Toda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:36
CPC Classifications
C; C09; C09D; C09D183/00; C09D183/14
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
75 words
An organic liquid solution for forming a heat resistant organopolysiloxane film on a surface, said solution containing from about 10 to 70% by weight of an oligomer formed from a monohydrocarbylsilane triol of the formula RSi(OH) 3 wherein R is a substituted or unsubstituted monovalent hydrocarbon group, the degree of polymerization of said oligomer being from 2 to about 50, said solution having a viscosity of from about 2 to 200 centipoise at 25° C.
Claim 2
Dependent Claim
75 words
An organic liquid solution for forming a heat resistant organopolysiloxane film on a surface, said solution containing from about 10 to 70% by weight of an oligomer formed from a monohydrocarbylsilane triol of the formula RSi(OH) 3 wherein R is a substituted or unsubstituted monovalent hydrocarbon group, the degree of polymerization of said oligomer being from 2 to about 50, said solution having a viscosity of from about 2 to 200 centipoise at 25° C.
Claim 3
Dependent Claim
12 words
A solution as in claim 1 wherein R is methyl or phenyl.
Claim 4
Dependent Claim
26 words
A solution as in claim 1 wherein the organic solvent of the solution is selected from the group consisting of alcohols, esters, ketones and aromatic hydrocarbons.
Claim 5
Dependent Claim
47 words
A solution as in claims 1, 2 or 3 additionally containing up to 50% by moles based on the number of moles of the monohydrocarbylsilane triol of a dihydrocarbylsilane diol of the formula R 2 Si(OH) 2 wherein R is a substituted or unsubstituted monovalent hydrocarbon group.
Claim 6
Dependent Claim
20 words
A process of forming an organic liquid solution for forming a heat resistant organopolysiloxane film on a surface which comprises:
Claim 7
Dependent Claim
20 words
A process of forming an organic liquid solution for forming a heat resistant organopolysiloxane film on a surface which comprises:
Claim 8
Dependent Claim
12 words
A process as in claim 5 wherein R is methyl or phenyl.
Claim 9
Dependent Claim
26 words
A process as in claim 5 wherein the organic solvent of the solution is selected from the group consisting of alcohols, esters, ketones and aromatic hydrocarbons.
Claim 10
Dependent Claim
47 words
A process as in claims 5, 6 or 7 additionally containing up to 50% by moles based on the number of moles of the monocarbylsilane triol of a dihydrocarbylsilane diol of the formula R 2 Si(OH) 2 wherein R is a substituted or unsubstituted monovalent hydrocarbon group.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-09-14 | 1991-03-16 | 1991-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-14 | 1995-03-16 | 1995-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-14 | 1999-03-16 | 1999-09-15 | $7700.00 | Window Closed / Lapsed |