US3709743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acidic deposition process
Assignee: Hi Tek Polymers Inc
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Filing: 1971-06-16
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Granted: 1973-01-09
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Expires: 1991-06-16
Abstract
Abstract A metallic article is coated with an adherent polymer film by contacting the metallic article with an aqueous bath containing an anionic surfactant stabilized emulsion of a synthetic resinous film forming composition and an oxidizing acid. Interaction of the oxidizing acid and the metallic article produces ions at the surface of the article which ions in turn cause coagulation of the emulsion polymer at the bath-article interface and, thereby, the formation of a coating of the polymer on the surface of the article.
Inventors
- 👤 J Dalton
- 👤 R Graver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:40
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/14; B05D7/142; C; C09; C09D; C09D5/00; C09D5/08; C09D5/088
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
52 words
The process of claim 1 wherein the resinous film-forming composition is present in the amount of 5 to 20% by weight based on the total weight of the bath and the nitric acid is present in the amount of 0.5 - 2% by weight based on the total weight of the bath.
Claim 2
Dependent Claim
14 words
nitric acid in the amount of 0.1 to 5 weight of the bath and
Claim 3
Dependent Claim
37 words
water: B. removing the article from contact with the bath; C. rinsing the article with water and D. heating the article at about 150* F. to about 450* F. for a time sufficient to dry the coating.
Claim 4
Dependent Claim
20 words
The process of claim 1 wherein the resinous film-forming composition is a homopolymer or copolymer of ethylenically unsaturated polymerizable monomers.
Claim 5
Dependent Claim
16 words
The process of claim 1 wherein pigments are added to the bath to produce pigmented coatings.
Claim 6
Dependent Claim
26 words
The process of claim 1 wherein the emulsion is stabilized with 50 to 100 weight percent anionic surfactant and 0 to 50 weight percent nonionic surfactant.
Claim 7
Dependent Claim
21 words
The process of claim 1 wherein the synthetic resinous film-forming composition is a homopolymer or copolymer of ethylenically unsaturated polymerizable monomers.
Claim 8
Dependent Claim
29 words
The process of claim 6 wherein the copolymer contains 0.25 to 5.0 weight percent based on the copolymer of a polymerizable acid which contains three to four carbon atoms.
Claim 9
Dependent Claim
65 words
A process for coating ferriferous, zincferrous and stanniferrous metal articles which comprises: A. contacting the articles for a time sufficient to form a coating thereon with an aqueous emulsion containing bath which chemically attacks the surface of the metal article and generates ions which render the emulsion unstable adjacent to the surface and cause coagulation of the emulsion onto the surface, wherein said bath contains
Claim 10
Dependent Claim
63 words
The process of claim 8 wherein the resinous film-forming composition is a homopolymer or copolymer of ethylenically unsaturated polymerizable monomers and is present in the amount of 5 to 20 weight percent based on the total weight of the bath and the nitric acid is present in the amount of 0.5 to 2 weight percent based on the total weight of the bath.
Claim 11
Dependent Claim
16 words
The process of claim 9 wherein pigments are added to the bath to produce pigmented coatings.
Claim 12
Dependent Claim
26 words
The process of claim 9 wherein the emulsion is stabilized with 50 to 100 weight percent anionic surfactant and 0 to 50 weight percent nonionic surfactant.
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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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |