US4323599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for achieving particle-to-particle contact in an antifouling coating
Assignee: Standard Oil Co
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Filing: 1979-11-28
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Granted: 1982-04-06
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Expires: 1999-11-28
Abstract
Abstract Copper flake is treated to remove oxides and other contaminants from its surface and incorporated into an uncured water-insoluble polymer. When applied to a marine structure such as a boat hull, the coating exhibits outstanding anti-fouling properties. The cleaned copper flake is preferably incorporated into an uncured epoxy resin modified by reaction with a polyol. In one embodiment of the invention, the coating is applied and cured underwater using a strippable carrier.
Inventors
- 👤 David W. Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:14
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/16; C09D5/1656; C09D5/1662; B; B05; B05D; B05D1/00; B05D1/28; B05D1/286; B05D7/00; B05D7/22; B05D7/222; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/226; C09D163/00; C09D5/1606; C09D5/1612; C09D5/1618; Y; Y10; Y10S; Y10S428/00; Y10S428/907; Y10T; Y10T428/00; Y10T428/15; Y10T428/25; Y10T428/256; Y10T428/31504; Y10T428/31511; Y10T428/31529
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
85 words
A method for controlling fouling of the surface of a water pipe interior or a submergible or submerged marine structure by applying a copper-containing polymeric coating, said method comprising: (a) providing the copper in flake form; (b) cleaning the copper flake to remove substantially all contaminating surface deposits; (c) mixing the cleaned copper flake with an uncured water-insoluble polymer; (d) applying the mixture as a coating onto the surface of the water pipe interior or submergible or submerged marine structure; and (e) curing the coating.
Claim 2
Independent Claim
85 words
A method for controlling fouling of the surface of a water pipe interior or a submergible or submerged marine structure by applying a copper-containing polymeric coating, said method comprising: (a) providing the copper in flake form; (b) cleaning the copper flake to remove substantially all contaminating surface deposits; (c) mixing the cleaned copper flake with an uncured water-insoluble polymer; (d) applying the mixture as a coating onto the surface of the water pipe interior or submergible or submerged marine structure; and (e) curing the coating.
Claim 3
Dependent Claim
15 words
The method of claim 1 wherein said water-insoluble polymer is an epoxy or polyester resin.
Claim 4
Dependent Claim
18 words
The method of claim 1 wherein said water-insoluble polymer is an epoxy resin modified with an epoxidized polyol.
Claim 5
Dependent Claim
28 words
The method of claim 3 wherein the copper flake is incorporated into the resin in a quantity sufficient to render the entire thickness of the coating electrically conductive.
Claim 6
Dependent Claim
19 words
The method of claim 4 wherein the copper flake constitutes 25% to 60% by weight of the uncured mixture.
Claim 7
Dependent Claim
25 words
The method of claim 1, 3 or 4 wherein the cleaning is accomplished by contacting the coper flake with an organic solvent and an acid.
Claim 8
Dependent Claim
41 words
The method of claim 6 wherein said solvent is selected from the group consisting of haloalkylenes of 1-3 carbon atoms, ethers, ketones and aromatic solvents and said acid is selected from the group consisting of dilute mineral acids and polycarboxylic acids.
Claim 9
Dependent Claim
17 words
The method of claim 1, 3 or 4 wherein the coating is applied to a boat hull.
Claim 10
Dependent Claim
41 words
The method of claim 1, 3 or 4 wherein the mixture is first applied as a coating to a strippable carrier, then the coating is contacted against an underwater surface and the carrier is stripped off after the coating is cured.
References Cited (Backward Citations)
US3983075A
Cited
US4115130A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-04-05 | 1985-10-05 | 1986-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-05 | 1989-10-05 | 1990-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-05 | 1993-10-05 | 1994-04-06 | $7700.00 | Window Closed / Lapsed |