Patent US3935349A successfully refreshed from Google Patents.
US3935349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of coating an aluminum article
Assignee: Sumitomo Light Metal Industries Ltd
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Filing: 1973-10-01
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Granted: 1976-01-27
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Expires: 1993-10-01
Abstract
Abstract A paint film based on a thermo-setting resin which is applied on an aluminum article may be improved in its adhesion properties and resistance to chemical and mechanical attacks as well as in its resistance to weathering, if the surface of the aluminum article is previously anodized to form the oxide surface layer or is treated in boiling water to form the boehmite surface layer and if the oxide surface layer, including the boehmite layer, is pre-treated with a silane compound prior to the application of the coating composition. The application of the paint composition is conducted in this invention by means of a known coating technique such as dipping, spraying, showering, brushing or roller-coating, other than the electro-deposition technique.
Inventors
- 👤 Shiro Terai
- 👤 Akinari Ichiryu
- 👤 Toshio Suzuki
- 👤 Toshinori Maeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:57
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/14; C; C23; C23C; C23C22/00; C23C22/82; C23C22/83; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/18; C25D11/24; B05D1/00; B05D1/18; B05D1/185; B05D2202/00; B05D2202/20; B05D2202/25; B05D3/00; B05D3/10; B05D3/102; B05D7/50; B05D7/52
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
162 words
A process for coating an aluminum article, which comprises treating an aluminum article having an anodized oxide surface layer or a boehmite surface layer with a silane compound of the formula: [R(CH.sub.2).sub.n ]--Si--X.sub.3 wherein n is 1, 2 or 3, R is an alkylenediamino group of 1-4 carbon atoms, an alkoxy group having an epoxy group and containing 1-4 carbon atoms, X is at least one group which is reactive with aluminol and is selected from the group consisting of an alkoxy group of 1-4 carbon atoms and an alkyl group of 1-4 carbon atoms provided that all of the group X do not constitute the alkyl group simultaneously; then coating the so-treated aluminum article with a known coating composition containing a thermo-setting resin as the film forming material by applying said coating composition onto the oxide layer surface of the aluminum article by means of a coating technique other than electrodeposition, and finally heat-curing the resin coating on the aluminum article.
Claim 2
Dependent Claim
162 words
A process for coating an aluminum article, which comprises treating an aluminum article having an anodized oxide surface layer or a boehmite surface layer with a silane compound of the formula: [R(CH.sub.2).sub.n ]--Si--X.sub.3 wherein n is 1, 2 or 3, R is an alkylenediamino group of 1-4 carbon atoms, an alkoxy group having an epoxy group and containing 1-4 carbon atoms, X is at least one group which is reactive with aluminol and is selected from the group consisting of an alkoxy group of 1-4 carbon atoms and an alkyl group of 1-4 carbon atoms provided that all of the group X do not constitute the alkyl group simultaneously; then coating the so-treated aluminum article with a known coating composition containing a thermo-setting resin as the film forming material by applying said coating composition onto the oxide layer surface of the aluminum article by means of a coating technique other than electrodeposition, and finally heat-curing the resin coating on the aluminum article.
Claim 3
Dependent Claim
16 words
A process as claimed in claim 1 in which the silane compound employed is N-(β-aminoethyl)-γ-aminopropyl trimethoxysilane.
Claim 4
Dependent Claim
16 words
A process as claimed in claim 1 in which the silane compound employed is N-(β-aminoethyl)-γ-aminopropyl methyldimethoxysilane.
Claim 5
Dependent Claim
16 words
A process as claimed in claim 1 in which the silane compound employed is γ-glycidoxypropyl tri-methoxysilane.
References Cited (Backward Citations)
US2902389A
Cited
US3175921A
Cited
US3664888A
Cited
US3711313A
Cited
US3734784A
Cited
US3706592A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-26 | 1979-07-28 | 1980-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-26 | 1983-07-28 | 1984-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-26 | 1987-07-28 | 1988-01-27 | $7700.00 | Window Closed / Lapsed |