US4017334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treating aluminum cans
Assignee: Henkel Corp
•
Filing: 1975-12-15
•
Granted: 1977-04-12
•
Expires: 1995-12-15
Abstract
Abstract Disclosed is a process for treating aluminum wherein the surface is contacted with a solution containing phosphate, a tannin, titanium and fluoride prior to inking or lacquering. The process produces a coating exhibiting adhesion, color and corrosion resistance comparable to that obtained via conventional chromium-based processes without creating the pollution problems of chromium disposal.
Inventors
- 👤 Yasunobu Matsushima
- 👤 Hideo Oka
- 👤 Katsuyoshi Noji
- 👤 Hiroyoshi Nakagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:36
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/40; C23C22/44; C23C22/34; C23C22/36; C23C22/361
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
71 words
In a process for treating aluminum to impart corrosion resistance and paint adhesion to the surface thereof, the improvement comprising treating the surface with an aqueous solution having an acidic pH and containing in dissolved form: a vegetable tannin: 0.0l - 10 g/l a titanium compound: 0.01 - 10 g/l as Ti a fluoride compound: 0.01 - 10 g/l as F a phosphate compound: 0.01 - 50 g/l as PO.sub. 4
Claim 2
Dependent Claim
71 words
In a process for treating aluminum to impart corrosion resistance and paint adhesion to the surface thereof, the improvement comprising treating the surface with an aqueous solution having an acidic pH and containing in dissolved form: a vegetable tannin: 0.0l - 10 g/l a titanium compound: 0.01 - 10 g/l as Ti a fluoride compound: 0.01 - 10 g/l as F a phosphate compound: 0.01 - 50 g/l as PO.sub. 4
Claim 3
Dependent Claim
44 words
The process of claim 1 wherein the solution contains: a vegetable tannin: 0.1 - 10 g/l a titanium compound: 0.01 - 1 g/l as Ti a fluoride compound: 0.1 - 5 g/l as F a phosphate compound: 0.05 - 5 g/l as PO 4
Claim 4
Dependent Claim
22 words
The process of claim 1 wherein the solution is contacted with the aluminum surface for a period of 5 - 30 seconds.
Claim 5
Dependent Claim
17 words
The process of claim 1 wherein the pH value of the solution is from 1.2 to 5.5.
Claim 6
Dependent Claim
40 words
The process of claim 1 wherein the solution contains: a vegetable tannin about 0.15 g/l a titanium compound about 0.07 g/l as Ti a fluoride compound about 0.5 g/l as F a phosphate compound about 0.05 g/l as PO 4
Claim 7
Dependent Claim
60 words
A corrosion resisting aqueous acidic composition suitable for imparting improved corrosion resistance and paint adhesion to an aluminum surface which composition comprises in dissolved form; a vegetable tannin: 0.01 - 10 g/l a titanium compound: 0.01 - 10 g/l as Ti a fluoride compound: 0.01 - 10 g/l as F a phosphate compound: 0.01 - 50 g/l as PO 4
Claim 8
Dependent Claim
60 words
A corrosion resisting aqueous acidic composition suitable for imparting improved corrosion resistance and paint adhesion to an aluminum surface which composition comprises in dissolved form; a vegetable tannin: 0.01 - 10 g/l a titanium compound: 0.01 - 10 g/l as Ti a fluoride compound: 0.01 - 10 g/l as F a phosphate compound: 0.01 - 50 g/l as PO 4
Claim 9
Dependent Claim
50 words
The composition of claim 6 comprising: a vegetable tannin: 0.1 - 10 g/l a titanium compound: 0.01 - 1 g/l as Ti a fluoride compound: 0.1 - 5 g/l as F a phosphate compound: 0.5 - 5 g/l as PO 4 and exhibiting a pH of from 1.2 to 5.5.
Claim 10
Dependent Claim
30 words
The composition of claim 7, comprising: a vegetable tannin about 0.15 g/l a titanium compound about 0.07 g/l a fluoride compound about 0.5 g/l a phosphate compound about 0.05 g./l
Claim 11
Dependent Claim
45 words
An aqueous concentrate composition, suitable for treating an aluminum surface when diluted with water comprising in dissolved form a vegetable tannin, a titanium compound, a fluoride compound and a phosphate compound in a weight ratio of tannin:titanium:fluoride:phosphate of 1 : 0.001-1000 : 0.001-1000 : 0.001-5000.
Claim 12
Dependent Claim
45 words
An aqueous concentrate composition, suitable for treating an aluminum surface when diluted with water comprising in dissolved form a vegetable tannin, a titanium compound, a fluoride compound and a phosphate compound in a weight ratio of tannin:titanium:fluoride:phosphate of 1 : 0.001-1000 : 0.001-1000 : 0.001-5000.
Claim 13
Dependent Claim
16 words
The concentrate of claim 9 wherein the ratio is 1 : 0.001-10 : 0.01-50 : 0.005-50.
Claim 14
Dependent Claim
17 words
The concentrate of claim 10 wherein the ratio is about 1 : 0.5 : 3 : 0.3.
Claim 15
Dependent Claim
11 words
The modified aluminum surface obtained by the process of claim 1.
Claim 16
Dependent Claim
11 words
The modified aluminum surface obtained by the process of claim 5.
References Cited (Backward Citations)
US2502441A
Cited
US2813814A
Cited
US2854368A
Cited
US3148984A
Cited
DE2446492A1
Cited
FR2246653A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-11 | 1980-10-11 | 1981-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-11 | 1984-10-11 | 1985-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-11 | 1988-10-11 | 1989-04-12 | $7700.00 | Window Closed / Lapsed |