US4490181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkaline cleaning of tin surfaces
Assignee: Henkel Corp
•
Filing: 1982-11-22
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Granted: 1984-12-25
•
Expires: 2002-11-22
Abstract
Abstract A process for cleaning soil, lubricants or other such contaminants from tin surfaces without visibly etching the tin surface by applying aqueous alkaline cleaning solutions to said surfaces. Spraying is a preferred means for contacting the surface with the solutions. The cleaning solutions may be effectively employed at temperatures as low as about 100° F. and thus may be characterized as low temperature cleaners. The cleaning solutions comprise an alkaline component in an amount effective to substantially remove said contaminants from the tin surface and an inhibitor in an amount effective to inhibit or deter etching of the tin surface. The inhibitor is a compound selected from the group consisting of substituted benzenes having at least two or more hydroxy substituents, quinones and substituted quinones.
Inventors
- 👤 Newton W. McCready
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:08
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/14; C23G1/20; C23G1/16; C23G1/18
Claims Analysis
Total Claims: 45
Claim 1
Independent Claim
118 words
A process for cleaning tin surfaces to substantially remove soil, lubricants or other contaminants therefrom without visibly etching the tin surface, comprising contacting said surface at a temperature effective to substantially remove said contaminants from the tin surface with an aqueous cleaning solution having a pH about 11 to about 13 comprising an alkaline component in an amount effective to substantially remove said contaminant from the tin surface, and an inhibitor in an amount effective to inhibit etching of the surface, said inhibitor being selected from the group consisting of benzoquinones, and substituted benzoquinones, wherein the substituents on the said substituted benzoquinones are selected from the group consisting of hydroxy, hydrogen, halo, alkyl, alkyldienyl, alkoxy, nitro and cyano.
Claim 2
Dependent Claim
118 words
A process for cleaning tin surfaces to substantially remove soil, lubricants or other contaminants therefrom without visibly etching the tin surface, comprising contacting said surface at a temperature effective to substantially remove said contaminants from the tin surface with an aqueous cleaning solution having a pH about 11 to about 13 comprising an alkaline component in an amount effective to substantially remove said contaminant from the tin surface, and an inhibitor in an amount effective to inhibit etching of the surface, said inhibitor being selected from the group consisting of benzoquinones, and substituted benzoquinones, wherein the substituents on the said substituted benzoquinones are selected from the group consisting of hydroxy, hydrogen, halo, alkyl, alkyldienyl, alkoxy, nitro and cyano.
Claim 3
Dependent Claim
18 words
A process according to claim 1, wherein the cleaning temperature is about 100° F. to about 130° F.
Claim 4
Dependent Claim
26 words
A process according to claim 1 or 2 wherein the concentration of alkaline component in the cleaning solution is about 3 g/l to about 5 g/l.
Claim 5
Dependent Claim
25 words
A process according to claim 3 wherein the concentration of the inhibitor in the cleaning solution is about 0.02 g/l to about 0.06 g/l. PG,34
Claim 6
Dependent Claim
21 words
The process according to claim 4 wherein the inhibitor is selected from the group consisting of 1,4-benzoquinone, 1,2-benzoquinone, α-naphthaquinone, and β-naphthaquinone.
Claim 7
Dependent Claim
71 words
The process according to claim 4 wherein the inhibitor is selected from the group consisting of benzoquinones and substituted benzoquinones of the formulae ##STR2## wherein: R 1 , R 2 , R 3 and R 4 are hydrogen, hydroxy, alkyl, halo, carboxyl, alkoxy, nitro or cyano; or R 1 and R 2 are together an alkyldienyl group, and together with the quinone ring to which they are attached, form a naphthaquinone.
Claim 8
Dependent Claim
34 words
The process according to claim 3 wherein the alkaline component of the cleaning solution is selected from the group consisting of alkali metal hydroxides, carbonates, and silicates, ammonium hydroxides and carbonates, and mixtures thereof.
Claim 9
Dependent Claim
31 words
The process of claim 7 wherein the alkaline component comprises a mixture of sodium metasilicate, sodium carbonate and a compound selected from the group consisting of sodium hydroxide and potassium hydroxide.
Claim 10
Dependent Claim
20 words
The process of claim 1 wherein the cleaning solution includes a polyelectrolyte in an amount effective to substantially prevent precipitation.
Claim 11
Dependent Claim
16 words
The process of claim 9 wherein the amount of polyelectrolyte is at least about 0.1 g/l.
Claim 12
Dependent Claim
20 words
The process of claim 1 wherein the cleaning solution includes at least about 0.2 g/l of one or more surfactants.
Claim 13
Dependent Claim
16 words
The process of claim 11 wherein the surfactant comprises about 0.2 g/l to about 0.5 g/l.
Claim 14
Dependent Claim
17 words
The process of claim 11 or 12 wherein the cleaning solution includes a low foaming nonionic surfactant.
Claim 15
Dependent Claim
16 words
The process of claim 1 wherein the surface is contacted with the cleaning solution by spraying.
Claim 16
Dependent Claim
19 words
The process of claim 1 including rinsing the surface with water after it is contacted with the cleaning solution.
Claim 17
Dependent Claim
86 words
An aqueous cleaning composition having a pH of about 11 to about 13 for cleaning tin surfaces to substantially remove soil, lubricants or other contaminants therefrom without visibly etching the tin surface, at temperatures between about 100° F. to about 130° F., comprising an alkaline component in an amount effective to substantially remove said contaminants from the tin surface and an inhibitor in an amount effective to inhibit visible etching of the surface, said inhibitor being selected from the group consisting of benzoquinones and substituted benzoquinones.
Claim 18
Dependent Claim
86 words
An aqueous cleaning composition having a pH of about 11 to about 13 for cleaning tin surfaces to substantially remove soil, lubricants or other contaminants therefrom without visibly etching the tin surface, at temperatures between about 100° F. to about 130° F., comprising an alkaline component in an amount effective to substantially remove said contaminants from the tin surface and an inhibitor in an amount effective to inhibit visible etching of the surface, said inhibitor being selected from the group consisting of benzoquinones and substituted benzoquinones.
Claim 19
Dependent Claim
64 words
A cleaning solution according to claim 16 wherein the benzoquinones and substituted benzoquinones are of the formulae ##STR3## wherein: R 1 , R 2 , R 3 and R 4 are hydrogen, hydroxy, halo, alkoxy, alkyl, carboxyl, nitro, and cyano; or R 1 and R 2 form an alkyldienyl group, and together with the quinone ring to which they are attached, form a napthaquinone.
Claim 20
Dependent Claim
24 words
A cleaning composition according to claim 16 or 18 wherein the inhibitor is selected from the group consisting of 1,2-benzoquinone, 1,4-benzoquinone, and substituted benzoquinones.
Claim 21
Dependent Claim
20 words
A cleaning composition according to claim 16 wherein the amount of inhibitor is about 0.02 g/l to about 0.06 g/l.
Claim 22
Dependent Claim
35 words
A cleaning composition according to claim 16 wherein the alkaline component of the cleaning solution is selected from the group consisting of alkali metal hydroxides, carbonates, and silicates, ammonium hydroxides and carbonates and mixtures thereof.
Claim 23
Dependent Claim
33 words
A cleaning composition according to claim 20 wherein the alkaline component comprises a mixture of sodium metasilicate, sodium carbonate and a compound selected from the group consisting of sodium hydroxide and potassium hydroxide.
Claim 24
Dependent Claim
18 words
A cleaning composition according to claim 16 including a polyelectrolyte in an amount effective to substantially prevent precipitation.
Claim 25
Dependent Claim
18 words
A cleaning composition according to claim 22 wherein the amount of polyelectrolyte is at least about 0.1 g/l.
Claim 26
Dependent Claim
87 words
A solid cleaning composition which when added to water at a concentration of from about 3 g/l to about 7 g/l produces an aqueous alkaline cleaning solution having a pH of about 11 to about 13 for cleaning tin surfaces to substantially remove soil, lubricants or other contaminants therefrom without visibly etching the tin surface, and which comprises an alkaline component and an inhibitor in an amount effective to inhibit etching of the surface, said inhibitor being selected from the group consisting of benzoquinones and substituted benzoquinones.
Claim 27
Dependent Claim
87 words
A solid cleaning composition which when added to water at a concentration of from about 3 g/l to about 7 g/l produces an aqueous alkaline cleaning solution having a pH of about 11 to about 13 for cleaning tin surfaces to substantially remove soil, lubricants or other contaminants therefrom without visibly etching the tin surface, and which comprises an alkaline component and an inhibitor in an amount effective to inhibit etching of the surface, said inhibitor being selected from the group consisting of benzoquinones and substituted benzoquinones.
Claim 28
Dependent Claim
65 words
A solid cleaning composition according to claim 24 wherein the benzoquinones and substituted benzoquinones are of the formulae ##STR4## wherein: R 1 , R 2 , R 3 and R 4 are hydrogen, hydroxy, halo, alkoxy, alkyl, carboxyl, nitro, and cyano; or R 1 and R 2 form an alkyldienyl group, and together with the quinone ring to which they are attached, form a napthaquinone.
Claim 29
Dependent Claim
21 words
The solid cleaning composition of claim 24 wherein the alkaline component comprises at least about 15% by weight of the composition.
Claim 30
Dependent Claim
31 words
The solid cleaning composition of claim 24 wherein the alkaline component is selected from the group consisting of alkali metal hydroxides, carbonates and silicates, ammonium hydroxides and carbonates, and mixtures thereof.
Claim 31
Dependent Claim
20 words
The solid cleaning composition of claim 24 wherein the inhibitor comprises at least about 0.1% by weight of the composition.
Claim 32
Dependent Claim
18 words
The solid cleaning composition of claim 24 including a polyelectrolyte in an amount effective to substantially prevent precipitation.
Claim 33
Dependent Claim
98 words
An aqueous concentrate which when added to water at a concentration of about 0.5% to about 2% by volume produces an aqueous alkaline cleaning solution having a pH of about 11 to about 13 for cleaning tin surfaces to substantially remove soil, lubricants or other contaminants therefrom without visibly etching the tin surface and which comprises an alkaline component in an amount effective to substantially remove said contaminants from the tin surface, and an inhibitor, in an amount effective to inhibit etching of the surface, said inhibitor being selected from the group consisting of benzoquinones and substituted benzoquinones.
Claim 34
Dependent Claim
98 words
An aqueous concentrate which when added to water at a concentration of about 0.5% to about 2% by volume produces an aqueous alkaline cleaning solution having a pH of about 11 to about 13 for cleaning tin surfaces to substantially remove soil, lubricants or other contaminants therefrom without visibly etching the tin surface and which comprises an alkaline component in an amount effective to substantially remove said contaminants from the tin surface, and an inhibitor, in an amount effective to inhibit etching of the surface, said inhibitor being selected from the group consisting of benzoquinones and substituted benzoquinones.
Claim 35
Dependent Claim
19 words
The concentrate of claim 30 wherein the alkaline component comprises up to about 770 grams per liter of concentrate.
Claim 36
Dependent Claim
18 words
The concentrate of claim 30 wherein the inhibitor comprises at least about 2 grams per liter of concentrate.
Claim 37
Dependent Claim
16 words
The concentrate of claim 30 including a polyelectrolyte in an amount effective to substantially prevent precipitation.
Claim 38
Dependent Claim
63 words
The concentrate of claim 30 or 32 wherein benzoquinones and substituted benzoquinones are of the formulae ##STR5## wherein: R 1 , R 2 , R 3 and R 4 are hydrogen, hydroxy, halo, alkoxy, alkyl, carboxyl, nitro, and cyano; or R 1 and R 2 form an alkyldienyl group, and together with the quinone ring to which they are attached, form a naphthaquinone.
Claim 39
Dependent Claim
85 words
An aqueous cleaning composition having a pH of about 11 to about 13 for cleaning tin surfaces to substantially remove soil, lubricants or other contaminants therefrom without visibly etching the tin surface, at temperatures between about 100° F. to 130° F., comprising an alkaline component in an amount effective to substantially remove said contaminants from the tin surface, and an inhibitor in an amount effective to inhibit visible etching of the surface, said inhibitor being selected from the group consisting of 1,2,4-trihydroxybenzene, 1,3,5-trihydroxybenzene, and 1,2,4,5-tetrahydroxybenzene.
Claim 40
Dependent Claim
85 words
An aqueous cleaning composition having a pH of about 11 to about 13 for cleaning tin surfaces to substantially remove soil, lubricants or other contaminants therefrom without visibly etching the tin surface, at temperatures between about 100° F. to 130° F., comprising an alkaline component in an amount effective to substantially remove said contaminants from the tin surface, and an inhibitor in an amount effective to inhibit visible etching of the surface, said inhibitor being selected from the group consisting of 1,2,4-trihydroxybenzene, 1,3,5-trihydroxybenzene, and 1,2,4,5-tetrahydroxybenzene.
Claim 41
Dependent Claim
20 words
A cleaning composition according to claim 35 wherein the amount of inhibitor is about 0.03 g/l to about 0.06 g/l.
Claim 42
Dependent Claim
82 words
A solid cleaning composition which when added to water at a concentration of from about 3 g/l to about 7 g/l produces an aqueous alkaline cleaning solution having a pH of about 11 to about 13 for cleaning tin surfaces to substantially remove soil, lubricants or other contaminants therefrom without visibly etching the tin surface, and which comprises an alkaline component and about 0.5% to about 2% by weight of an inhibitor selected from the group consisting of 1,2,4-trihydroxybenzene, 1,3,5-trihydroxybenzene, and 1,2,4,5-tetrahydroxybenzene.
Claim 43
Dependent Claim
82 words
A solid cleaning composition which when added to water at a concentration of from about 3 g/l to about 7 g/l produces an aqueous alkaline cleaning solution having a pH of about 11 to about 13 for cleaning tin surfaces to substantially remove soil, lubricants or other contaminants therefrom without visibly etching the tin surface, and which comprises an alkaline component and about 0.5% to about 2% by weight of an inhibitor selected from the group consisting of 1,2,4-trihydroxybenzene, 1,3,5-trihydroxybenzene, and 1,2,4,5-tetrahydroxybenzene.
Claim 44
Dependent Claim
99 words
An aqueous concentrate which when added to water at a concentration of about 0.5% to about 2% by volume produces an aqueous alkaline cleaning solution having a pH of about 11 to about 13 for cleaning tin surfaces to substantially remove soil, lubricants or other contaminants therefrom without visibly etching the tin surface and which comprises an alkaline component in an amount effective to substantially remove said contaminants from the tin surface, and an inhibitor in an amount effective to inhibit visible etching of the surface, said inhibitor being selected from the group consisting of 1,2,4-trihydroxybenzene, 1,3,5-trihydroxybenzene, and 1,2,4,5-tetrahydroxybenzene.
Claim 45
Dependent Claim
99 words
An aqueous concentrate which when added to water at a concentration of about 0.5% to about 2% by volume produces an aqueous alkaline cleaning solution having a pH of about 11 to about 13 for cleaning tin surfaces to substantially remove soil, lubricants or other contaminants therefrom without visibly etching the tin surface and which comprises an alkaline component in an amount effective to substantially remove said contaminants from the tin surface, and an inhibitor in an amount effective to inhibit visible etching of the surface, said inhibitor being selected from the group consisting of 1,2,4-trihydroxybenzene, 1,3,5-trihydroxybenzene, and 1,2,4,5-tetrahydroxybenzene.
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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) | 1987-12-25 | 1988-06-25 | 1988-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-25 | 1992-06-25 | 1992-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-25 | 1996-06-25 | 1996-12-25 | $7700.00 | Window Closed / Lapsed |