US4312693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bonding of polyurethane to silicone rubber
Assignee: Witco Corp
•
Filing: 1980-05-30
•
Granted: 1982-01-26
•
Expires: 2000-05-30
Abstract
Abstract Silicone rubber is treated with certain gas plasmas at low pressures and ambient temperatures to improve the adhesion of a polyurethane coating to the silicone rubber.
Inventors
- 👤 George A. Salensky
- 👤 Ronald A. Martineau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:58
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/048; B; B32; B32B; B32B25/00; B32B25/04; B32B25/08; B32B25/20; B32B27/00; B32B27/40; B32B38/00; B32B38/0008; B32B7/00; B32B7/04; B32B7/10; C08J7/0427; C08J7/043; C08J7/046; C08J7/12; C08J7/123; B32B2310/00; B32B2310/14; B32B2319/00; C08J2383/00; C08J2383/04; C08J2475/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31598; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
95 words
A process for producing a laminate by the adhesion of the surface of silicone rubber to polyurethane consisting of rendering the surface of silicone rubber adhesive to polyurethane by contacting the silicone rubber with a gas plasma for from 10 seconds to 20 minutes at subatmospheric pressure, wherein said gas plasma is selected from the group consisting of oxygen, nitrogen, carbon dioxide, air and helium gas plasmas, and, within about 60 minutes of the end of said contacting, bringing the silicone rubber in pressure contact with polyurethane whereby the polyurethane adheres to the silicone rubber.
Claim 2
Dependent Claim
95 words
A process for producing a laminate by the adhesion of the surface of silicone rubber to polyurethane consisting of rendering the surface of silicone rubber adhesive to polyurethane by contacting the silicone rubber with a gas plasma for from 10 seconds to 20 minutes at subatmospheric pressure, wherein said gas plasma is selected from the group consisting of oxygen, nitrogen, carbon dioxide, air and helium gas plasmas, and, within about 60 minutes of the end of said contacting, bringing the silicone rubber in pressure contact with polyurethane whereby the polyurethane adheres to the silicone rubber.
Claim 3
Dependent Claim
21 words
A process as claimed in claim 1 wherein the nitrogen atoms of said polyurethane are bonded directly to aliphatic carbon atoms.
Claim 4
Dependent Claim
19 words
A process as claimed in claim 1 wherein the said pressure is from 0.1 to torr to 100 torr.
Claim 5
Dependent Claim
17 words
A process as claimed in claim 1 wherein the said pressure is from 0.1 to 10 torr.
Claim 6
Dependent Claim
24 words
A process as claimed in claim 1 wherein the silicone rubber is exposed to the gas plasma for from 30 seconds to 10 minutes.
Claim 7
Dependent Claim
37 words
A process as claimed in claim 1 wherein the silicone rubber is brought in pressure contact with the polyurethane within about 1 minute of the end of the contacting of the silicone rubber with the gas plasma.
Claim 8
Dependent Claim
13 words
A process as claimed in claim 1 wherein said gas plasma is oxygen.
Claim 9
Dependent Claim
13 words
A process as claimed in claim 1 wherein said gas plasma is nitrogen.
Claim 10
Dependent Claim
14 words
A process as claimed in claim 1 wherein said gas plasma is carbon dioxide.
Claim 11
Dependent Claim
13 words
A process as claimed in claim 1 wherein said gas plasma is air.
Claim 12
Dependent Claim
13 words
A process as claimed in claim 1 wherein said laminate is optically clear.
Claim 13
Dependent Claim
18 words
A process as claimed in claim 1 wherein said laminate is in the form of a protective mask.
References Cited (Backward Citations)
US3309299A
Cited
US3632386A
Cited
US4072769A
Cited
US3677877A
Cited
US3853657A
Cited
US3870610A
Cited
US3959105A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-25 | 1985-07-27 | 1986-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-25 | 1989-07-27 | 1990-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-25 | 1993-07-27 | 1994-01-26 | $7700.00 | Window Closed / Lapsed |