Patent US4313769A successfully refreshed from Google Patents.
US4313769A
Expired / Lapsed
US
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Coating solution for metal surfaces
Assignee: Henkel Corp
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Filing: 1980-07-03
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Granted: 1982-02-02
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Expires: 2000-07-03
Abstract
Abstract In an acidic aqueous coating solution which contains zirconium, hafnium or titanium, and fluoride and which is effective in forming on an aluminum surface a non-chromate coating to which overlying coatings adhere tightly and which is corrosion resistant and resists being discolored when subjected to hot water, the improvement comprising including in said coating solution a surfactant in an amount such that a coating formed from the surfactant-containing coating solution has an improved tendency to resist being discolored by hot water.
Inventors
- 👤 Frank J. Frelin
- 👤 Timm L. Kelly
- 👤 Anthony J. Malloy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:22
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/34
Claims Analysis
Total Claims: 43
Claim 1
Independent Claim
97 words
An acidic aqueous coating solution which is effective in forming a non-resinous, non-chromate, corrosion-resistant coating on an aluminum surface, said solution consisting essentially of a metal selected from the group consisting of zirconium, titanium and hafnium and mixtures of two or more of said metals, said metal being present in an amount of at least about 0.5×10 -3 m/l, fluoride in an amount at least sufficient to combine with all of said metal, and surfactant in an amount such that the coating formed from said solution has an improved tendency to resist being discolored by hot water.
Claim 2
Dependent Claim
97 words
An acidic aqueous coating solution which is effective in forming a non-resinous, non-chromate, corrosion-resistant coating on an aluminum surface, said solution consisting essentially of a metal selected from the group consisting of zirconium, titanium and hafnium and mixtures of two or more of said metals, said metal being present in an amount of at least about 0.5×10 -3 m/l, fluoride in an amount at least sufficient to combine with all of said metal, and surfactant in an amount such that the coating formed from said solution has an improved tendency to resist being discolored by hot water.
Claim 3
Dependent Claim
20 words
The coating solution of claim 1 wherein the surfactant is present in an amount of at least about 10 ppm.
Claim 4
Dependent Claim
37 words
The coating solution of claim 2 having a pH of about 3.5 to about 4.5 and including about 0.75×10 -3 to about 2×10 -3 m/l of zirconium and about 10 ppm to about 500 ppm of surfactant.
Claim 5
Dependent Claim
22 words
The coating solution of claim 3 wherein the amount of fluoride is at least about 4 moles per mole of said metal.
Claim 6
Dependent Claim
14 words
The coating solution of claim 1 including at least about 10 ppm of boron.
Claim 7
Dependent Claim
22 words
The coating solution of claim 5 wherein the boron is present in an amount of from about 10 to about 200 ppm.
Claim 8
Dependent Claim
8 words
The coating solution of claim 1 including tannin.
Claim 9
Dependent Claim
17 words
The coating solution of claim 1 including one or more of glutaric, ascorbic, maleic, or salicylic acid.
Claim 10
Dependent Claim
19 words
The coating solution of claim 1 or 5 including a polyhydroxy compound having no more than about 7 carbons.
Claim 11
Dependent Claim
12 words
The coating solution of claim 9 wherein said compound is gluconic acid.
Claim 12
Dependent Claim
92 words
An acidic, aqueous coating solution which is effective in forming a non-resinous, non-chromate, corrosion resistant coating on an aluminum surface, said solution consisting essentially of zirconium in an amount of from about 1×10 -3 to about 1.75×10 -3 m/l, surfactant in an amount of from about 20 to about 100 ppm, fluoride in an amount of at least about 4 moles per mole of zirconium, and boron in an amount of from about 10 to about 200 ppm, said solution having a pH within the range of about 3.7 to about 4.3.
Claim 13
Dependent Claim
92 words
An acidic, aqueous coating solution which is effective in forming a non-resinous, non-chromate, corrosion resistant coating on an aluminum surface, said solution consisting essentially of zirconium in an amount of from about 1×10 -3 to about 1.75×10 -3 m/l, surfactant in an amount of from about 20 to about 100 ppm, fluoride in an amount of at least about 4 moles per mole of zirconium, and boron in an amount of from about 10 to about 200 ppm, said solution having a pH within the range of about 3.7 to about 4.3.
Claim 14
Dependent Claim
13 words
The coating solution of claim 11 wherein the surfactant is a nonionic surfactant.
Claim 15
Dependent Claim
12 words
The coating solution of claim 12 wherein the pH is about 4.
Claim 16
Dependent Claim
15 words
The coating solution of claim 12 wherein the source of fluoride is HBF 4 .
Claim 17
Dependent Claim
11 words
The coating solution of claim 1 or 11 including nitric acid.
Claim 18
Dependent Claim
21 words
The coating solution of claim 3, 11, or 13 wherein the source of both the zirconium and fluoride is fluozirconic acid.
Claim 19
Dependent Claim
18 words
The coating solution of claim 1, 3, or 13 wherein the surfactant is a low-foaming alky polyethoxylated ether.
Claim 20
Dependent Claim
19 words
The coating solution of claim 1, 3, or 13 wherein the surfactant is a low-foaming polyethoxylated straight chain alcohol.
Claim 21
Dependent Claim
30 words
A method of coating an aluminum surface comprising contacting the surface with the coating solution of claim 1, 2, 3, 4, 5, 6, 7, 8, 11, 12, 13, or 14.
Claim 22
Dependent Claim
18 words
A method of coating an aluminum surface comprising contacting the surface with the coating solution of claim 9.
Claim 23
Dependent Claim
18 words
A method of coating an aluminum surface comprising contacting the surface with the coating solution of claim 15.
Claim 24
Dependent Claim
18 words
A method of coating an aluminum surface comprising contacting the surface with the coating solution of claim 16.
Claim 25
Dependent Claim
18 words
A method of coating an aluminum surface comprising contacting the surface with the coating solution of claim 17.
Claim 26
Dependent Claim
18 words
A method of coating an aluminum surface comprising contacting the surface with the coating solution of claim 18.
Claim 27
Dependent Claim
20 words
A method for coating aluminum cans comprising contacting the cans with the solution of claim 1, 3, 11, or 13.
Claim 28
Dependent Claim
89 words
An acidic aqueous concentrate such that an aqueous coating solution containing about 0.5 to about 10 weight percent of the concentrate is effective in forming a non-resinous, non-chromate, corrosion-resistant coating on an aluminum surface, said coating solution consisting essentially of: (A) at least about 0.5×10 -3 m/l of one or more of zirconium, titanium, and hafnium; (B) fluoride in an amount at least sufficient to combine with substantially all of the zirconium, titanium, or hafnium to form a complex therewith; and also (C) at least about 10 ppm surfactant.
Claim 29
Dependent Claim
89 words
An acidic aqueous concentrate such that an aqueous coating solution containing about 0.5 to about 10 weight percent of the concentrate is effective in forming a non-resinous, non-chromate, corrosion-resistant coating on an aluminum surface, said coating solution consisting essentially of: (A) at least about 0.5×10 -3 m/l of one or more of zirconium, titanium, and hafnium; (B) fluoride in an amount at least sufficient to combine with substantially all of the zirconium, titanium, or hafnium to form a complex therewith; and also (C) at least about 10 ppm surfactant.
Claim 30
Dependent Claim
59 words
An aqueous concentrate for replenishing a coating solution of the type defined in claim 1, 3, or 11 and consisting essentially of: (A) about 0.05 m/l to about 0.5 m/l of one or more of zirconium, titanium, and hafnium; (B) about 0.2 m/l to about 10 m/l of fluoride; and (C) about 1 to about 100 g/l of surfactant.
Claim 31
Dependent Claim
111 words
An acidic aqueous coating solution which is effective in forming a non-resinous, non-chromate, corrosion-resistant coating on an aluminum surface, said solution consisting essentially of a metal selected from the group consisting of zirconium, titanium and hafnium and mixtures of two or more of said metals, said metal being present in an amount of at least about 0.5×10 -3 m/l, fluoride in an amount at least sufficient to combine with all of said metal, and surfactant in an amount such that the coating formed from said solution has an improved tendency to resist being discolored by hot water, said solution having a pH within the range of about 3.5 to about 4.5.
Claim 32
Dependent Claim
111 words
An acidic aqueous coating solution which is effective in forming a non-resinous, non-chromate, corrosion-resistant coating on an aluminum surface, said solution consisting essentially of a metal selected from the group consisting of zirconium, titanium and hafnium and mixtures of two or more of said metals, said metal being present in an amount of at least about 0.5×10 -3 m/l, fluoride in an amount at least sufficient to combine with all of said metal, and surfactant in an amount such that the coating formed from said solution has an improved tendency to resist being discolored by hot water, said solution having a pH within the range of about 3.5 to about 4.5.
Claim 33
Dependent Claim
72 words
An acidic aqueous coating solution which is effective in forming a non-resinous, non-chromate, corrosion-resistant coating on an aluminum surface, said solution consisting essentially of about 0.75×10 -3 to about 2×10 -3 m/l of zirconium, fluoride in an amount at least sufficient to combine with all of said zirconium, and surfactant in an amount such that the coating formed from said solution has an improved tendency to resist being discolored by hot water.
Claim 34
Dependent Claim
72 words
An acidic aqueous coating solution which is effective in forming a non-resinous, non-chromate, corrosion-resistant coating on an aluminum surface, said solution consisting essentially of about 0.75×10 -3 to about 2×10 -3 m/l of zirconium, fluoride in an amount at least sufficient to combine with all of said zirconium, and surfactant in an amount such that the coating formed from said solution has an improved tendency to resist being discolored by hot water.
Claim 35
Dependent Claim
84 words
An acidic aqueous coating solution which is effective in forming a non-resinous, non-chromate, corrosion-resistant coating on an aluminum surface, said solution consisting essentially of a metal selected from the group consisting of zirconium, titanium, and hafnium and mixtures of two or more of said metals, said metal being present in an amount of at least about 0.5×10 -3 m/l, fluoride in an amount at least sufficient to combine with all of said metal, and about 10 to about 500 ppm of a nonionic surfactant.
Claim 36
Dependent Claim
84 words
An acidic aqueous coating solution which is effective in forming a non-resinous, non-chromate, corrosion-resistant coating on an aluminum surface, said solution consisting essentially of a metal selected from the group consisting of zirconium, titanium, and hafnium and mixtures of two or more of said metals, said metal being present in an amount of at least about 0.5×10 -3 m/l, fluoride in an amount at least sufficient to combine with all of said metal, and about 10 to about 500 ppm of a nonionic surfactant.
Claim 37
Dependent Claim
72 words
An acidic aqueous coating solution which is effective in forming a non-chromate, corrosion-resistant coating on an aluminum surface, said solution consisting essentially of zirconium in an amount of at least about 0.5×10 -3 m/l, fluoride in an amount at least sufficient to combine with all of said metal, and surfactant in an amount such that the coating formed from said solution has an improved tendency to resist being discolored by hot water.
Claim 38
Dependent Claim
72 words
An acidic aqueous coating solution which is effective in forming a non-chromate, corrosion-resistant coating on an aluminum surface, said solution consisting essentially of zirconium in an amount of at least about 0.5×10 -3 m/l, fluoride in an amount at least sufficient to combine with all of said metal, and surfactant in an amount such that the coating formed from said solution has an improved tendency to resist being discolored by hot water.
Claim 39
Dependent Claim
59 words
An acidic aqueous coating solution which is effective in forming a non-chromate, corrosion-resistant coating on an aluminum surface, said solution consisting essentially of zirconium in an amount of at least about 0.5×10 -3 m/l, fluoride in an amount at least sufficient to combine with all of said metal, and surfactant in an amount of at least about 10 ppm.
Claim 40
Dependent Claim
59 words
An acidic aqueous coating solution which is effective in forming a non-chromate, corrosion-resistant coating on an aluminum surface, said solution consisting essentially of zirconium in an amount of at least about 0.5×10 -3 m/l, fluoride in an amount at least sufficient to combine with all of said metal, and surfactant in an amount of at least about 10 ppm.
Claim 41
Dependent Claim
23 words
The coating solution of claim 32 wherein the surfactant is present in an amount of from about 10 ppm to about 500 ppm.
Claim 42
Dependent Claim
77 words
An acidic aqueous concentrate such that an aqueous coating solution containing about 0.5 to about 10 weight percent of the concentrate is effective in forming a non-chromate, corrosion-resistant coating on an aluminum surface, said coating solution consisting essentially of: (A) at least about 0.5×10 -3 m/l zirconium; (B) fluoride in an amount at least sufficient to combine with substantially all of said zirconium to form a complex therewith; and also (C) at least about 10 ppm surfactant.
Claim 43
Dependent Claim
77 words
An acidic aqueous concentrate such that an aqueous coating solution containing about 0.5 to about 10 weight percent of the concentrate is effective in forming a non-chromate, corrosion-resistant coating on an aluminum surface, said coating solution consisting essentially of: (A) at least about 0.5×10 -3 m/l zirconium; (B) fluoride in an amount at least sufficient to combine with substantially all of said zirconium to form a complex therewith; and also (C) at least about 10 ppm surfactant.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-02-01 | 1985-08-03 | 1986-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-01 | 1989-08-03 | 1990-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-01 | 1993-08-03 | 1994-02-02 | $7700.00 | Window Closed / Lapsed |