US3772060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pre-treatment of metal substrates with complex halogen-containing phosphates of aluminum
Assignee: Imperial Chemical Industries Ltd
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Filing: 1971-11-29
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Granted: 1973-11-13
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Expires: 1991-11-29
Abstract
Abstract Pre-treatment of a metal, especially aluminum or zinc, prior to painting, by means of a complex halogen-containing phosphorus or aluminum containing chemically-bound molecules of water and/or an organic hydroxy compound. The preferred complex phosphate contains ethyl alcohol molecules and has an empirical formula of A1PC1H25C8O8, and is most conveniently used in solution in methyl alcohol or ethyl alcohol.
Inventors
- 👤 J Birchall
- 👤 J Cassidy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:22
CPC Classifications
A; A01; A01G; A01G9/00; A01G9/14; A01G9/1407; B; B05; B05D; B05D3/00; B05D3/10; C; C08; C08J; C08J7/00; C08J7/04; C08J7/042; C08J7/0423; C08J7/043; C23; C23C; C23C22/00; C23C22/02; C23C22/03; D; D21; D21H; D21H19/00; D21H19/10; D21H19/14; D21H19/24; D21H19/28; D21H19/30; C03; C03C; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/229; C03C2218/00; C03C2218/10; C03C2218/11; Y; Y02; Y02A; Y02A40/00; Y02A40/10; Y02A40/25
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
69 words
A coating process in which there is applied to a metal substrate, firstly a complex halogen-containing phosphate of aluminum containing at least one chemically bound molecule of a hydroxy compound ROH, where R is selected from the group consisting of hydrogen and organic groups containing one to 10 carbon atoms, and secondly, a coating composition selected from the group consisting of paints, lacquers, varnishes, enamels and aqueous emulsion paints.
Claim 2
Dependent Claim
12 words
A process according to claim 2 in which the halogen is chlorine.
Claim 3
Dependent Claim
32 words
A process according to claim 2 in which the ratio of the number of gram atoms of aluminum to the number of gram atoms of phosphorus in the complex is substantially 1:1.
Claim 4
Dependent Claim
20 words
A process according to claim 2 in which R is an organic group containing from one to four carbon atoms.
Claim 5
Dependent Claim
25 words
A process according to claim 2 in which the complex phosphate of aluminum has the empirical formula Al P Cl H25C8O8 or Al PCl H11O9.
Claim 6
Dependent Claim
18 words
A process according to claim 2 in which the complex phosphate of aluminum is dissolved in an alcohol.
Claim 7
Dependent Claim
21 words
A process according to claim 2 in which there is also present, with the complex phosphate of aluminum, an organic polymer.
Claim 8
Dependent Claim
20 words
A process according to claim 2 in which the coated substrate is heated to a temperature of at least 50*C.
References Cited (Backward Citations)
US2743203A
Cited
US3489595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |