US4120995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for bonding a durable low surface energy coating
Assignee: International Business Machines Corp
•
Filing: 1977-10-18
•
Granted: 1978-10-17
•
Expires: 1997-10-18
Abstract
Abstract This invention is concerned with a process for bonding a durable low surface energy polymeric coating to a metal or oxide surface. The metal or oxide surface is first treated with an alkali, thereby maximizing the hydroxide ion concentration on the surface, and then in a rigorously dry state with a rigorously dry fluorinated material to form the polymeric coating. The fluorinated material has the formula Rf -- O -- (CH.sub.2).sub.n -- SiX.sub.3 wherein Rf is a fluorinated lower alkyl group, n is an integer from 2 to 10, and X is a halogen, cyanide or alkoxy group.
Inventors
- 👤 Peter Beverley Phipps
- 👤 Bhim Sain Sharma
- 👤 Anthony Wai Wu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:17
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/24; C; C23; C23C; C23C14/00; C23C14/06; C23C14/12; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/25; Y10T428/256; Y10T428/31504; Y10T428/3154
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
96 words
A process for bonding a durable low surface energy coating to a metal or oxide surface, said process comprising maximizing the hydroxide ion concentration on the surface by treating said surface with an alkali, rigorously drying said surface, and then contacting the rigorously dry surface with a rigorously dry material having the formula Rf -- O -- (CH.sub.2).sub.n -- SiX.sub.3 wherein Rf is a fluorinated lower alkyl group, n in an integer from 2 to 10, and X is halogen, cyanide or alkoxy group, thereby condensing the fluorinated material with the hydroxide ions on said surface.
Claim 2
Dependent Claim
96 words
A process for bonding a durable low surface energy coating to a metal or oxide surface, said process comprising maximizing the hydroxide ion concentration on the surface by treating said surface with an alkali, rigorously drying said surface, and then contacting the rigorously dry surface with a rigorously dry material having the formula Rf -- O -- (CH.sub.2).sub.n -- SiX.sub.3 wherein Rf is a fluorinated lower alkyl group, n in an integer from 2 to 10, and X is halogen, cyanide or alkoxy group, thereby condensing the fluorinated material with the hydroxide ions on said surface.
Claim 3
Dependent Claim
13 words
A process as claimed in claim 1 wherein the alkali is ammonium hydroxide.
Claim 4
Dependent Claim
26 words
A process as claimed in claim 1 wherein the fluorinated material is contacted with the metal or oxide surface at a temperature of about 80° C.
Claim 5
Dependent Claim
23 words
A process as claimed in claim 1 wherein the fluorinated material is transported as a gas mixed with a dry inert gas carrier.
Claim 6
Dependent Claim
13 words
A process as claimed in claim 1 wherein the fluorinated material is perfluoro-isopropoxy-propyl-trichloro-silane.
Claim 7
Dependent Claim
75 words
A process for bonding a durable, low surface energy coating to a metal or metal oxide surface, said process comprising maximizing the hydroxide ion concentration on the surface by treating said surface with ammonium hydroxide, rigorously drying said surface and then contacting the rigorously dry surface at about 80° C. with rigorously dry perfluoro-isopropoxy-propyl-trichloro-silane in the vapor state mixed with dry nitrogen gas, thereby condensing the fluorinated material with the hydroxide ions on said surface.
Claim 8
Dependent Claim
75 words
A process for bonding a durable, low surface energy coating to a metal or metal oxide surface, said process comprising maximizing the hydroxide ion concentration on the surface by treating said surface with ammonium hydroxide, rigorously drying said surface and then contacting the rigorously dry surface at about 80° C. with rigorously dry perfluoro-isopropoxy-propyl-trichloro-silane in the vapor state mixed with dry nitrogen gas, thereby condensing the fluorinated material with the hydroxide ions on said surface.
References Cited (Backward Citations)
US3422131A
Cited
US3935349A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-16 | 1982-04-17 | 1982-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-16 | 1986-04-17 | 1986-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-16 | 1990-04-17 | 1990-10-17 | $7700.00 | Window Closed / Lapsed |