US4376814A
Expired / Lapsed
US
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Ceramic deposition on aluminum
Assignee: CNA Holdings LLC
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Filing: 1982-03-18
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Granted: 1983-03-15
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Expires: 2002-03-18
Abstract
Abstract An aluminum substrate is electrochemically or thermally deposited with a ceramic surface coating comprising an organic acid, such as polyvinyl phosphonic acid, and an alkaline earth silicate or borate.
Inventors
- 👤 John E. Walls
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:16
CPC Classifications
B; B41; B41N; B41N3/00; B41N3/03; B41N3/038
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
101 words
An article comprising an aluminum sheet, and a coating on said sheet, said coating comprising a composition produced by the method of (a) admixing a compound selected from the group consisting of silicates, tetraborates and pentaborates having monovalent cations, with (b) the product obtained by titrating an aqueous solution of one or more compounds selected from the group consisting of organic sulfonic, phosphonic, phosphoric and tribasic or higher functionality carboxylic acids with a monovalent alkali until an alkaline pH is attained provided said titration product is selected such that it does not form a precipitate with the compound of part (a).
Claim 2
Dependent Claim
101 words
An article comprising an aluminum sheet, and a coating on said sheet, said coating comprising a composition produced by the method of (a) admixing a compound selected from the group consisting of silicates, tetraborates and pentaborates having monovalent cations, with (b) the product obtained by titrating an aqueous solution of one or more compounds selected from the group consisting of organic sulfonic, phosphonic, phosphoric and tribasic or higher functionality carboxylic acids with a monovalent alkali until an alkaline pH is attained provided said titration product is selected such that it does not form a precipitate with the compound of part (a).
Claim 3
Dependent Claim
36 words
The article of claim 1 wherein said acid is selected from the group consisting of mellitic acid, pyrromellitic acid, polybenzene phosphonic acid, polystyrene sulfonic acid, poly diisopropyl benzene sulfonic acid, polyacrylic acid and poly methacrylic acid.
Claim 4
Dependent Claim
23 words
The article of claim 1 wherein said compound (a) comprises a compound selected from the group consisting of sodium, potassium and lithium silicate.
Claim 5
Dependent Claim
23 words
The article of claim 1 wherein said compound (a) comprises a compound selected from the group consisting of ammonium pentaborate and potassium tetraborate.
Claim 6
Dependent Claim
35 words
The article of claim 1 wherein said acid is selected from the group consisting of polyvinyl phosphonic acid, phytic acid, polyvinyl sulfonic acid, polyvinyl methyl ether maleic anhydride copolymer and 2 ethyl hexyl polyphosphoric acid.
Claim 7
Dependent Claim
23 words
The article of claim 5 wherein said compound (a) comprises a compound selected from the group consisting of sodium, potassium and lithium silicate.
Claim 8
Dependent Claim
23 words
The article of claim 5 wherein said alkali comprises a compound selected from the group consisting of sodium, lithium, potassium and ammonium hydroxide.
Claim 9
Dependent Claim
23 words
The article of claim 7 wherein said compound (a) comprises a compound selected from the group consisting of sodium, potassium and lithium silicate.
Claim 10
Dependent Claim
18 words
The article of claim 1 or 8 further comprising a lithographically suitable photosensitive composition applied to said coating.
Claim 11
Dependent Claim
23 words
The article of claim 1 wherein said alkali comprises a compound selected from the group consisting of sodium, lithium, potassium and ammonium hydroxide.
Claim 12
Dependent Claim
23 words
The article of claim 10 wherein said compound (a) comprises a compound selected from the group consisting of sodium, potassium and lithium silicate.
Claim 13
Independent Claim
125 words
A method for producing an article comprising treating an aluminum sheet for at least about 30 seconds with a coating composition having a temperature in the range of from about 60° C. to about 100° C., said coating comprising a composition produced by the method of (a) admixing a compound selected from the group consisting of silicates, tetraborates and pentaborates having monovalent cations, with (b) the product obtained by titrating an aqueous solution of one or more compounds selected from the group consisting of organic sulfonic, phosphonic, phosphoric and tribasic or higher functionality carboxylic acids with a monovalent alkali until an alkaline pH is attained provided said titration product is selected such that it does not form a precipitate with the compound of part (a).
Claim 14
Independent Claim
125 words
A method for producing an article comprising treating an aluminum sheet for at least about 30 seconds with a coating composition having a temperature in the range of from about 60° C. to about 100° C., said coating comprising a composition produced by the method of (a) admixing a compound selected from the group consisting of silicates, tetraborates and pentaborates having monovalent cations, with (b) the product obtained by titrating an aqueous solution of one or more compounds selected from the group consisting of organic sulfonic, phosphonic, phosphoric and tribasic or higher functionality carboxylic acids with a monovalent alkali until an alkaline pH is attained provided said titration product is selected such that it does not form a precipitate with the compound of part (a).
Claim 15
Dependent Claim
70 words
The method of claim 12 wherein said acid is selected from the group consisting of polyvinyl phosphonic acid, phytic acid, polyvinyl sulfonic acid, polyvinyl methyl ether maleic anhydride copolymer and 2-ethyl hexyl polyphosphoric acid; and said alkali comprises a compound selected from the group consisting of sodium, lithium, potassium and ammonium hydroxide; and said compound (a) comprises a compound selected from the group consisting of sodium, potassium and lithium silicate.
Claim 16
Dependent Claim
18 words
The method of claim 12 or 13 further comprising applying a lithographically suitable photosensitive composition to said coating.
Claim 17
Independent Claim
107 words
A method for producing an article comprising treating an aluminum sheet, by electrodepositing a coating on said sheet, said coating comprising a composition produced by the method of (a) admixing a compound selected from the group consisting of silicates, tetraborates and pentaborates having monovalent cations, with (b) the product obtained by titrating an aqueous solution of one or more compounds selected from the group consisting of organic sulfonic, phosphonic, phosphoric and tribasic or higher functionality carboxylic acids with a monovalent alkali until an alkaline pH is attained provided said titration product is selected such that it does not form a precipitate with the compound of part (a).
Claim 18
Independent Claim
107 words
A method for producing an article comprising treating an aluminum sheet, by electrodepositing a coating on said sheet, said coating comprising a composition produced by the method of (a) admixing a compound selected from the group consisting of silicates, tetraborates and pentaborates having monovalent cations, with (b) the product obtained by titrating an aqueous solution of one or more compounds selected from the group consisting of organic sulfonic, phosphonic, phosphoric and tribasic or higher functionality carboxylic acids with a monovalent alkali until an alkaline pH is attained provided said titration product is selected such that it does not form a precipitate with the compound of part (a).
Claim 19
Dependent Claim
70 words
The method of claim 15 wherein said acid is selected from the group consisting of polyvinyl phosphonic acid, phytic acid, polyvinyl sulfonic acid, polyvinyl methyl ether maleic anhydride copolymer and 2-ethyl hexyl polyphoric acid; and said alkali comprises a compound selected from the group consisting of sodium, lithium, potassium and ammonium hydroxide; and said compound (a) comprises a compound selected from the group consisting of sodium, potassium and lithium silicate.
Claim 20
Dependent Claim
18 words
The method of claim 15 or 16 further comprising applying a lithographically suitable photosensitive composition to said coating.
Claim 21
Dependent Claim
66 words
The method of claim 15 or 16 wherein said electrolysis is conducted in an electrolyte maintained at from about its freezing point to about 90° C., the cathode to anode distance is from about 2 to about 75 cm; a current density of from about 3 to about 30 A/dm 2 is applied, and a voltage of from about 1 to about 120 volts is used.
Claim 22
Dependent Claim
16 words
The method of claim 18 further comprising applying a lithographically suitable photosensitive composition to said coating.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-14 | 1986-09-13 | 1987-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-14 | 1990-09-13 | 1991-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-14 | 1994-09-13 | 1995-03-15 | $7700.00 | Window Closed / Lapsed |