US4012351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of acidic aqueous coating compositions containing an organic coating-forming material
Assignee: Henkel Corp
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Filing: 1974-09-30
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Granted: 1977-03-15
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Expires: 1994-09-30
Abstract
Abstract An acidic aqueous coating composition containing an organic coating-forming material forms on a metallic surface immersed therein a coating, the weight or thickness of which is related to the time the surface is immersed in the composition. The coating composition, which tends to become unstable as a result of the build up of metal ions in the composition, is stabilized by removing the metal ions with an ion exchange material. Also, in maintaining stability, anionic and/or nonionic surfactants or dispersing agents, which are present in the composition to disperse the organic-coating forming material, are added to the composition in an amount in excess of that which is added to replenish the organic coating-forming material as it is consumed during use. Also, coating compositions treated with the ion exchange material tend to produce coatings which have a textured or grainy appearance. The texturing of coatings can be avoided by contacting the coating composition with the ion exchange material in the presence of a cationic surfactant or an amphoteric surfactant which has cationic properties in the acidic aqueous coating composition, or other material which maintains the relatively small particles of the organic coating-forming material in the composition.
Inventors
- 👤 Wilbur S. Hall
- 👤 Harry M. Leister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:22
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/14; B05D7/142; C; C09; C09D; C09D5/00; C09D5/08; C09D5/088; C09D7/00
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
101 words
In an acidic aqueous coating composition comprising (A) solid particles of an organic coating-forming material dispersed in the aqueous phase of said composition by an anionic or nonionic dispersing agent or a mixture thereof and (B) an oxidizing agent, wherein said composition is effective in forming on a metallic surface immersed therein, in the absence of the use of electricity, an organic coating which increases in weight or thickness the longer said surface is immersed in said composition, the improvement comprising including in said composition a surfactant having cationic properties in an amount of at least about 0.5 g/l of composition.
Claim 2
Dependent Claim
101 words
In an acidic aqueous coating composition comprising (A) solid particles of an organic coating-forming material dispersed in the aqueous phase of said composition by an anionic or nonionic dispersing agent or a mixture thereof and (B) an oxidizing agent, wherein said composition is effective in forming on a metallic surface immersed therein, in the absence of the use of electricity, an organic coating which increases in weight or thickness the longer said surface is immersed in said composition, the improvement comprising including in said composition a surfactant having cationic properties in an amount of at least about 0.5 g/l of composition.
Claim 3
Dependent Claim
12 words
A composition according to claim 1 wherein said particles are resin particles.
Claim 4
Dependent Claim
13 words
A composition according to claim 2 wherein said surfactant is a cationic surfactant.
Claim 5
Dependent Claim
13 words
A composition according to claim 2 wherein said surfactant is an amphoteric surfactant.
Claim 6
Dependent Claim
106 words
An acidic aqueous coating composition in accordance with claim 2 comprising: a. about 5 g/l to about 550 g/l of resin dispersed in the composition; b. about 0.4 g/l to about 5 g/l of fluoride ion; c. an oxidizing agent selected from the class consisting of H 2 O 2 and dichromate, said agent being present in an amount sufficient to provide from about 0.01 to about 0.2 of oxidizing equivalent per liter of composition; d. hydrogen ion in an amount sufficient to impart a pH to the composition of about 1.6 to about 3.8; and e. about 0.05 to about 0.5 g/l of said surfactant.
Claim 7
Dependent Claim
46 words
A composition in accordance with claim 5 comprising: a. styrene-butadiene copolymer resin solids; b. about 1 to about 5 g/l of hydrofluoric acid; and c. about 1.5 to about 6 g/l of hydrogen peroxide; wherein the pH of said composition is about 1.6 to about 3.0.
Claim 8
Dependent Claim
92 words
A composition according to claim 5 comprising: a. about 40 g/l to about 200 g/l of styrene-butadiene copolymer dispersed in the composition; b. about 1 g/l to about 3 g/l of hydrofluoric acid; c. about 1 g/l to about 3 g/l of hydrogen peroxide; d. about 0 g/l to about 5 g/l of phosphoric acid; e. about 0.35 g/l to about 3.5 g/l of a black pigment; and f. about 0.2 g/l to about 0.4 g/l of an amphoteric surfactant, wherein said composition has a pH of about 1.6 to about 3.
Claim 9
Dependent Claim
19 words
A composition acording to claim 7 including about 0.1 to about 5 g/l of a nonionic or anionic surfactant.
Claim 10
Dependent Claim
34 words
A composition according to claim 7 wherein said surfactant is an amphoteric surfactant which is: N-coco, beta-amino propionic acid; N-lauryl, myristil beta-amino propionic acid; or the compound of Formula I or Formula II above.
Claim 11
Dependent Claim
20 words
A composition according to claim 9 wherein said resin solids are dispersed in the composition by a nonionic dispersing agent.
Claim 12
Dependent Claim
19 words
A composition according to claim 4 wherein the amount of said surfactant is about 0.05 to about 0.5 g/l.
Claim 13
Dependent Claim
30 words
A composition according to claim 11 wherein said amphoteric surfactant is: N-coco, beta-amino propionic acid; N-lauryl, myristil beta-amino propionic acid; or the compound of Formula I or Formula II above.
Claim 14
Dependent Claim
19 words
A composition according to claim 3 wherein the amount of said surfactant is about 0.05 to about 0.5 g/l.
Claim 15
Dependent Claim
18 words
A composition according to claim 11 wherein the amount of said surfactant is at least about 0.1 g/l.
Claim 16
Dependent Claim
18 words
A composition according to claim 11 wherein the amount of said surfactant is at least about 0.2 g/l.
Claim 17
Dependent Claim
18 words
A composition according to claim 13 wherein the amount of said surfactant is at least about 0.1 g/l.
Claim 18
Dependent Claim
18 words
A composition according to claim 13 wherein the amount of said surfactant is at least about 0.2 g/l.
Claim 19
Dependent Claim
9 words
A composition according to claim 2 including black pigment.
Claim 20
Dependent Claim
9 words
A composition according to claim 11 including black pigment.
Claim 21
Dependent Claim
9 words
A composition according to claim 13 including black pigment.
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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) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |