US4842889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing lubricated surfaces
Assignee: Becton Dickinson and Co
•
Filing: 1988-06-16
•
Granted: 1989-06-27
•
Expires: 2008-06-16
Abstract
Abstract A method for lubricating a low surface energy polymeric surface includes plasma treatment of the surface. A film of a polysiloxane lubricant is applied to the plasma-treated surface to give an even coating of the lubricant which is stable for a protracted period of time.
Inventors
- 👤 Can B. Hu
- 👤 Donald D. Solomon
- 👤 Victor A. Williamitis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:26
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/123; B; B29; B29C; B29C59/00; B29C59/14; C08J7/04; C08J7/0427; C08J2483/00
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
71 words
A method for preparing a lubricated surface comprising treating a perfluorinated polymeric surface with a plasma generated from a gas to give a plasma-treated polymeric surface and applying thereto by a process other than plasma deposition a film of a polydialkylsiloxane lubricant, said film having a surface tension substantially the same as or less than the surface energy of said plasma-treated surface, said film thereby fully wetting said plasma treated surface.
Claim 2
Independent Claim
71 words
A method for preparing a lubricated surface comprising treating a perfluorinated polymeric surface with a plasma generated from a gas to give a plasma-treated polymeric surface and applying thereto by a process other than plasma deposition a film of a polydialkylsiloxane lubricant, said film having a surface tension substantially the same as or less than the surface energy of said plasma-treated surface, said film thereby fully wetting said plasma treated surface.
Claim 3
Dependent Claim
29 words
The method in accordance with claim 1 wherein said polymeric surface is selected from the group consisting of polyethylene, polypropylene, polyurethane, polystyrene, polyvinylchloride, polytetrafluoroethylene and fluorinated ethylene propylene polymer.
Claim 4
Dependent Claim
25 words
The method in accordance with claim 1 wherein said gas is selected from the group consisting of nitrogen, argon, neon, xenon, krypton and mixtures thereof.
Claim 5
Dependent Claim
23 words
The method in accordance with claim 1 wherein said treating step includes generating plasma with a radio frequency of 0.05 to 50 megaherz.
Claim 6
Dependent Claim
22 words
The method in accordance with claim 1 wherein said treating step includes generating plasma at a radio frequency of about 13.56 megaherz.
Claim 7
Dependent Claim
24 words
The method in accordance with claim 1 wherein said treating step includes generating plasma at a power of from about 1 to 1000 watts.
Claim 8
Dependent Claim
22 words
The method in accordance with claim 1 wherein said treating step includes generating plasma at a temperature of 0° to 200° C.
Claim 9
Dependent Claim
22 words
The method in accordance with claim 1 wherein said treating step includes generating plasma at a pressure of 0.1 to 100 torr.
Claim 10
Dependent Claim
27 words
The method in accordance with claim 1 wherein said treating step includes generating plasma at a gas flow rate of 1 to 200 cubic centimeters per second.
Claim 11
Dependent Claim
20 words
The method in accordance with claim 1 wherein said treating step includes maintaining the plasma for 0.01 to 12 hours.
Claim 12
Dependent Claim
52 words
The method in accordance with claim 1 wherein said polydialkylsiloxane has the formula ##STR2## wherein R and R' may independently be an alkyl group of 1 to 20 carbon atoms or are joined into a ring of 5 to 8 carbon atoms and n is an integer of from 1 to 2000.
Claim 13
Dependent Claim
13 words
The method in accordance with claim 11 wherein said polydialkylsiloxane is a polydimethylsiloxane.
Claim 14
Dependent Claim
19 words
The method in accordance with claim 11 wherein said lubricant has a viscosity from about 10 to 100,000 centistokes.
Claim 15
Independent Claim
67 words
A method for preparing a lubricated surface comprising treating a polymeric surface with a plasma to give a plasma-treated polymeric surface and applying thereto by a process other than plasma deposition a film of a polydialkylsiloxane lubricant, said film having a surface tension substantially the same as or less than the surface energy of said plasma treated surface, said film thereby fully wetting said plasma treated surface.
Claim 16
Independent Claim
67 words
A method for preparing a lubricated surface comprising treating a polymeric surface with a plasma to give a plasma-treated polymeric surface and applying thereto by a process other than plasma deposition a film of a polydialkylsiloxane lubricant, said film having a surface tension substantially the same as or less than the surface energy of said plasma treated surface, said film thereby fully wetting said plasma treated surface.
Claim 17
Independent Claim
92 words
A method for preparing a lubricated perfluorinated polymeric surface comprising: (a) subjecting a perfluorinated polymeric surface to an ionizing plasma generated by passing a radio frequency discharge of 50 kilohertz through argon to give a plasma-treated perfluorinated polymeric surface; and (b) applying to said plasma-treated perfluorinated polymeric surface by a process other than plasma deposition a film of polydialkylsiloxane lubricant, said film of polydialkylsiloxane lubricant having a surface tension substantially the same as or less than the surface energy of said plasma-treated surface, said film thereby fully wetting said plasma treated surface.
Claim 18
Independent Claim
92 words
A method for preparing a lubricated perfluorinated polymeric surface comprising: (a) subjecting a perfluorinated polymeric surface to an ionizing plasma generated by passing a radio frequency discharge of 50 kilohertz through argon to give a plasma-treated perfluorinated polymeric surface; and (b) applying to said plasma-treated perfluorinated polymeric surface by a process other than plasma deposition a film of polydialkylsiloxane lubricant, said film of polydialkylsiloxane lubricant having a surface tension substantially the same as or less than the surface energy of said plasma-treated surface, said film thereby fully wetting said plasma treated surface.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-26 | 1992-12-26 | 1993-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-26 | 1996-12-26 | 1997-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-26 | 2000-12-26 | 2001-06-27 | $7700.00 | Window Closed / Lapsed |