Patent US3986993A successfully refreshed from Google Patents.
US3986993A
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US
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Fluorocarbon coating composition
Assignee: EIDP Inc
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Filing: 1975-04-01
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Granted: 1976-10-19
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Expires: 1995-04-01
Abstract
Abstract A composition containing fluorocarbon polymer, colloidal silica, alkyl benzene, water-miscible alcohol containing 4 or more carbon atoms, amine, fatty acid containing 8 or more carbon atoms, and liquid carrier is provided. This composition is useful for coating metal, especially cookware, to give a non-stick finish and also to provide an excellent primer coat.
Inventors
- 👤 Eustathios Vassiliou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:55
CPC Classifications
A; A47; A47J; A47J36/00; A47J36/02; C; C08; C08K; C08K3/00; C08K3/34; C08K3/36; C08K5/00; C08K5/01; C08K5/04; C08K5/05; C08K5/09; C08K5/16; C08K5/17; C09; C09D; C09D127/00; C09D127/02; C09D127/12; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
141 words
A composition consisting essentially of a. 20-90%, by weight of total solids, a particulate fluorocarbon polymer; b. 10-80%, by weight of total solids, colloidal silica having a pH of 8.4-9.9 at 25° C., whose particles have a size of 5-100 millimicrons and specific surface area of 125-420 square meters per gram; c. 1-10%, by weight of total composition, alkyl benzene; d. 1-10%, by weight of total composition, alcohol containing 4 or more carbon atoms, said alcohol being miscible with water; e. 0.3-10%, by weight of total composition, fatty acid containing 8 or more carbon atoms; f. 1-15%, by weight of total composition, amine having the formula ##EQU1## wherein R 1 contains 1 to 6 carbon atoms and may contain other functional groups, and R 2 and R 3 contain one to six carbon atoms or hydrogen; and g. a liquid carrier.
Claim 2
Dependent Claim
141 words
A composition consisting essentially of a. 20-90%, by weight of total solids, a particulate fluorocarbon polymer; b. 10-80%, by weight of total solids, colloidal silica having a pH of 8.4-9.9 at 25° C., whose particles have a size of 5-100 millimicrons and specific surface area of 125-420 square meters per gram; c. 1-10%, by weight of total composition, alkyl benzene; d. 1-10%, by weight of total composition, alcohol containing 4 or more carbon atoms, said alcohol being miscible with water; e. 0.3-10%, by weight of total composition, fatty acid containing 8 or more carbon atoms; f. 1-15%, by weight of total composition, amine having the formula ##EQU1## wherein R 1 contains 1 to 6 carbon atoms and may contain other functional groups, and R 2 and R 3 contain one to six carbon atoms or hydrogen; and g. a liquid carrier.
Claim 3
Dependent Claim
39 words
The composition of claim 1 further containing an anti-mudcracking agent, said agent being silicone, at a concentration up to 10%, by weight of total solids, or a polymeric adjunct, at a concentration of 5-25%, by weight of total solids.
Claim 4
Dependent Claim
15 words
The composition of claim 2 further containing up to 40%, by weight of solids, pigment.
Claim 5
Dependent Claim
27 words
The composition of claim 1 wherein the fluorocarbon polymer is polytetrafluoroethylene, a copolymer of tetrafluoroethylene and hexafluoropropylene in all monomer unit weight ratios, or a mixture thereof.
Claim 6
Dependent Claim
11 words
The composition of claim 1 wherein the fluorocarbon polymer is polytetrafluoroethylene.
Claim 7
Dependent Claim
11 words
The composition of claim 1 wherein the alkyl benzene is toluene.
Claim 8
Dependent Claim
13 words
The composition of claim 1 wherein the alcohol is diethylene glycol monobutyl ether.
Claim 9
Dependent Claim
12 words
The composition of claim 1 wherein the fatty acid is oleic acid.
Claim 10
Dependent Claim
75 words
The composition of claim 1 consisting essentially of: a. 55-65%, by weight of total solids, polytetrafluoroethylene; b. 15-30%, by weight of total solids, colloidal silica; c. 4-8%, by weight of the composition, toluene; d. 1-5%, by weight of the composition, diethylene glycol monobutyl ether; e. 0.4-5%, by weight of the compositon, oleic acid; f. 9-10%, by weight of the composition, triethanolamine; g. 1-5%, by weight of solids, silicone; h. 1-10%, by weight of solids, pigment.
Claim 11
Dependent Claim
11 words
An article bearing a coating of the composition of claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-19 | 1980-04-19 | 1980-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-19 | 1984-04-19 | 1984-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-19 | 1988-04-19 | 1988-10-19 | $7700.00 | Window Closed / Lapsed |