Patent US4338376A successfully refreshed from Google Patents.
US4338376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High fluorocarbon content coating composition, method of application, and coated article
Assignee: Otis Elevator Co
•
Filing: 1980-10-20
•
Granted: 1982-07-06
•
Expires: 2000-10-20
Abstract
Abstract A coating composition displaying an extremely low coefficient of friction particularly with respect to rubber-type materials and with high abrasion resistance and excellent adhesion to a wide variety of substrates, including metal and glass is provided. The composition contains a high fluorocarbon polymer content, (e.g., polytetrafluoroethylene), a silane wetting agent, a thermosetting resin (e.g. epoxy), and optionally a crosslinking agent and is easy to apply.
Inventors
- 👤 Steven Kritzler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:21
CPC Classifications
C; C09; C09D; C09D127/00; C09D127/02; C09D127/12; C09D127/18; C09D163/00; C08; C08L; C08L61/00; C08L61/20; C08L63/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31525; Y10T428/31529; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
93 words
A lubricious coating composition characterized by a polytetrafluoroethylene fluorocarbon polymer component, an epoxy thermosetting resin component, an amine cross-linking agent, and a silane wetting agent, based on weight percent, the fluorocarbon:epoxy resin ratio is up to about 4:1, the amine cross-linking agent:epoxy resin ratio is up to about 2:1, and the silane wetting agent is present in an amount up to about 1.5% by weight based on total weight of solids in the composition, the composition having a low coefficient of friction with high abrasion resistance and adhesion when applied to a substrate.
Claim 2
Dependent Claim
93 words
A lubricious coating composition characterized by a polytetrafluoroethylene fluorocarbon polymer component, an epoxy thermosetting resin component, an amine cross-linking agent, and a silane wetting agent, based on weight percent, the fluorocarbon:epoxy resin ratio is up to about 4:1, the amine cross-linking agent:epoxy resin ratio is up to about 2:1, and the silane wetting agent is present in an amount up to about 1.5% by weight based on total weight of solids in the composition, the composition having a low coefficient of friction with high abrasion resistance and adhesion when applied to a substrate.
Claim 3
Dependent Claim
42 words
The coating composition of claim 1 wherein the silane wetting agent is n-beta-amino-gamma-amino-propyl-trimethoxy silane, the epoxy has an epoxide equivalent of 600 to 700, and the amine cross-linking agent is a fatty polyamide amine with an amine value of 161 to 173.
Claim 4
Dependent Claim
20 words
The coating composition of claim 1 including a solvent comprising methylisobutyl ketone, methylethyl ketone, Freon 13, xylol, or mixtures thereof.
Claim 5
Dependent Claim
18 words
The composition of claim 3 wherein the solvent comprises up to about 60% by weight of the composition.
Claim 6
Independent Claim
105 words
A method of rendering a substrate lubricious comprising applying to a substrate and drying a composition characterized by a polytetrafluoroethylene fluorocarbon polymer component, an epoxy thermosetting resin component, an amine cross-linking agent, and a silane wetting agent, based on weight percent, the fluorocarbon:epoxy resin ratio is up to about 4:1, the amine cross-linking agent:epoxy resin ratio is up to about 2:1, and the silane wetting agent is present in an amount up to about 1.5% by weight based on total weight of solids in the composition, the composition having a low coefficient of friction with high abrasion resistance and adhesion when applied to the substrate.
Claim 7
Independent Claim
105 words
A method of rendering a substrate lubricious comprising applying to a substrate and drying a composition characterized by a polytetrafluoroethylene fluorocarbon polymer component, an epoxy thermosetting resin component, an amine cross-linking agent, and a silane wetting agent, based on weight percent, the fluorocarbon:epoxy resin ratio is up to about 4:1, the amine cross-linking agent:epoxy resin ratio is up to about 2:1, and the silane wetting agent is present in an amount up to about 1.5% by weight based on total weight of solids in the composition, the composition having a low coefficient of friction with high abrasion resistance and adhesion when applied to the substrate.
Claim 8
Dependent Claim
41 words
The method of claim 2 wherein the silane wetting agent is n-beta-amino-gamma-amino-propyl-trimethoxy silane, the epoxy has an epoxide equivalent of 600 to 700, and the amine cross-linking agent is a fatty polyamide amine with an amine value of 161 to 173.
Claim 9
Dependent Claim
22 words
The method of claim 2 wherein the composition includes a solvent comprising methylisobutyl ketone, methylethyl ketone, Freon 13, xylol, or mixtures thereof.
Claim 10
Dependent Claim
18 words
The method of claim 7 wherein the solvent comprises up to about 60% by weight of the composition.
Claim 11
Dependent Claim
18 words
The method of claim 2 wherein the coating has a final thickness of about 0.002 in. (0.005 cm).
Claim 12
Dependent Claim
12 words
The method of claim 2 wherein the composition is applied by spraying.
Claim 13
Dependent Claim
12 words
The method of claim 2 wherein the substrate is metal or glass.
Claim 14
Dependent Claim
89 words
A composite article comprising a substrate having a lubricious surface layer characterized by a polytetrafluoroethylene fluorocarbon polymer component, an epoxy thermosetting resin component, an amine cross-linking agent, and a silane wetting agent, based on weight percent, the fluorocarbon:epoxy resin ratio is up to about 2:1, and the silane wetting agent is present is an amount up to about 1.5% by weight based on total weight of solids in the composition, the composition having a low coefficient of friction with high abrasion resistance and adhesion when applied to the substrate.
Claim 15
Dependent Claim
89 words
A composite article comprising a substrate having a lubricious surface layer characterized by a polytetrafluoroethylene fluorocarbon polymer component, an epoxy thermosetting resin component, an amine cross-linking agent, and a silane wetting agent, based on weight percent, the fluorocarbon:epoxy resin ratio is up to about 2:1, and the silane wetting agent is present is an amount up to about 1.5% by weight based on total weight of solids in the composition, the composition having a low coefficient of friction with high abrasion resistance and adhesion when applied to the substrate.
Claim 16
Dependent Claim
41 words
The article of claim 12 wherein the silane wetting agent is n-beta-amino-gamma-amino-propyl-trimethoxy silane, the epoxy has an epoxide of 600 to 700, and the amine cross-linking agent is a fatty acid polyamide amine with an amine value of 161 to 173.
Claim 17
Dependent Claim
18 words
The article of claim 12 wherein the coating has a final thickness of about 0.002 in. (0.005 cm).
Claim 18
Dependent Claim
12 words
The article of claim 12 wherein the substrate is metal or glass.
References Cited (Backward Citations)
US3144118A
Cited
US3111426A
Cited
US3766133A
Cited
US3661831A
Cited
US3793287A
Cited
US4036906A
Cited
DE2141879C3
Cited
US3899563A
Cited
US3900594A
Cited
US3850867A
Cited
US3853690A
Cited
US3879302A
Cited
US3872045A
Cited
US3970627A
Cited
US4073762A
Cited
US3988287A
Cited
US3940360A
Cited
US3929721A
Cited
US3986993A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-07-05 | 1986-01-04 | 1986-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-05 | 1990-01-04 | 1990-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-05 | 1994-01-04 | 1994-07-06 | $7700.00 | Window Closed / Lapsed |