US4311764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane surface treatment and resulting monomolecular layered article
Assignee: PPG Industries Ohio Inc
•
Filing: 1980-10-01
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Granted: 1982-01-19
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Expires: 2000-10-01
Abstract
Abstract A method for producing a lubricating, nonreactive surface layer on polyurethane by adsorption of a nonreactive species is disclosed.
Inventors
- 👤 Helmut Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:26
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/18; B05D1/185; B29; B29C; B29C33/00; B29C33/56; B29C33/60; B29C33/62; B82; B82Y; B82Y30/00; B82Y40/00; C; C08; C08J; C08J7/00; C08J7/04; C08J7/046; C08J7/06; C08J7/065; C08J2375/00; C08J2375/04; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
50 words
A method for treating polyurethane to produce a lubricating, nonreactive surface layer which comprises contacting the polyurethane surface with a carboxylated fluorosurfactant capable of chemisorption at the polyurethane surface for a sufficient time to enable chemisorption of the carboxylated fluorosurfactant by the polyurethane to form a lubricating, nonreactive surface layer.
Claim 2
Independent Claim
50 words
A method for treating polyurethane to produce a lubricating, nonreactive surface layer which comprises contacting the polyurethane surface with a carboxylated fluorosurfactant capable of chemisorption at the polyurethane surface for a sufficient time to enable chemisorption of the carboxylated fluorosurfactant by the polyurethane to form a lubricating, nonreactive surface layer.
Claim 3
Dependent Claim
16 words
The method according to claim 1, wherein the carboxylated fluorosurfactant is a moderately carboxylated anionic fluorosurfactant.
Claim 4
Dependent Claim
22 words
The method according to claim 2, wherein the carboxylated fluorosurfactant is an essentially saturated, moderately carboxylated, anionic fluorosurfactant without lengthy methylene groups.
Claim 5
Dependent Claim
19 words
The method according to claim 3, wherein the polyurethane is treated with a dilute solution of the carboxylated fluorosurfactant.
Claim 6
Dependent Claim
21 words
The method according to claim 4, wherein the solvent is selected from the group consisting of water, alcohols and mixtures thereof.
Claim 7
Dependent Claim
21 words
The method according to claim 4, wherein the concentration of the carboxylated fluorosurfactant is from about 0.01 to about 5 percent.
Claim 8
Dependent Claim
29 words
The method according to claim 1, wherein a polyurethane surface is treated with an aqueous solution of 0.01 to 1 percent of an essentially saturated anionic, moderately carboxylated fluorosurfactant.
Claim 9
Dependent Claim
21 words
A polyurethane article having a lubricating nonreactive surface layer prepared by the chemisorption of a carboxylated fluorosurfactant at the polyurethane surface.
Claim 10
Dependent Claim
21 words
A polyurethane article having a lubricating nonreactive surface layer prepared by the chemisorption of a carboxylated fluorosurfactant at the polyurethane surface.
Claim 11
Dependent Claim
18 words
The article according to claim 8, wherein the carboxylated fluorosurfactant is an essentially saturated, anionic, moderately carboxylated fluorosurfactant.
Claim 12
Dependent Claim
20 words
The article according to claim 9, wherein the carboxylated fluorosurfactant is adsorbed at the polyurethane surface in a molecular layer.
References Cited (Backward Citations)
US3509015A
Cited
US3808077A
Cited
US4093775A
Cited
US4213870A
Cited
US4203856A
Cited
US4169904A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-18 | 1985-07-20 | 1986-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-18 | 1989-07-20 | 1990-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-18 | 1993-07-20 | 1994-01-19 | $7700.00 | Window Closed / Lapsed |