US4313983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for depositing latex films on metal surfaces
Assignee: Individual
•
Filing: 1980-08-04
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Granted: 1982-02-02
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Expires: 2000-08-04
Abstract
Abstract Process for depositing latexes having a net electrical charge on metal surfaces without the application of electrical current, preferably by the generation of the metal cation at the surface of the metal in a bath containing hydrogen peroxide and an organic acid which forms negatively-charged or neutral complexes with that particular metal ion.
Inventors
- 👤 Mouhanad Chaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:18
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/08; C09D5/088; B; B05; B05D; B05D7/00; B05D7/14; B05D7/142
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
97 words
An autodeposition process for coating a metallic surface which comprises preparing an aqueous solution substantially free of dissolved inorganic electrolyte, containing 2 to 30% by weight of cationically stabilized latex particles substantially free of hydrogen peroxide, adding to said aqueous solution about 10×10 -3 to 300×10 -3 mol per liter of hydrogen peroxide and about 10×10 -3 to 300×10 -3 mol per liter of an organic acid which is capable of forming charged metal complexes from metal ions, contacting said metallic surfaces with the said solution until a latex coating of a predetermined thickness has formed thereon.
Claim 2
Dependent Claim
97 words
An autodeposition process for coating a metallic surface which comprises preparing an aqueous solution substantially free of dissolved inorganic electrolyte, containing 2 to 30% by weight of cationically stabilized latex particles substantially free of hydrogen peroxide, adding to said aqueous solution about 10×10 -3 to 300×10 -3 mol per liter of hydrogen peroxide and about 10×10 -3 to 300×10 -3 mol per liter of an organic acid which is capable of forming charged metal complexes from metal ions, contacting said metallic surfaces with the said solution until a latex coating of a predetermined thickness has formed thereon.
Claim 3
Dependent Claim
30 words
The autodeposition process of claim 1 wherein said organic acid is selected from the group consisting of oxalic acid, malonic acid, malic acid, tartaric acid, citric acid and mandelic acid.
Claim 4
Dependent Claim
26 words
The autodeposition process of claim 1 wherein said metallic surface is formed from a metal selected from the group consisting of aluminum, zinc and carbon steel.
Claim 5
Dependent Claim
28 words
The autodeposition process of claim 1 wherein a ratio of the organic acid to hydrogen peroxide in said solution is in the range of about 0.25 to 10.
Claim 6
Dependent Claim
27 words
The autodeposition process of claim 1 wherein said latex particles comprise non-ionic stabilized latexes, and including the step of adding a cationic surfactant to said aqueous solution.
Claim 7
Dependent Claim
39 words
An autodeposition process of claim 1 where said aqueous solution substantially free of dissolved inorganic electrolytes contains about 4.2% by weight of cationically stabilized latex particles having an average diameter in the range of about 0.15 to 2 microns.
References Cited (Backward Citations)
US3585084A
Cited
US4214022A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-02-01 | 1985-08-03 | 1986-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-01 | 1989-08-03 | 1990-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-01 | 1993-08-03 | 1994-02-02 | $7700.00 | Window Closed / Lapsed |