US3969135A
Expired / Lapsed
US
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Low temperature aluminum cleaning composition and process
Assignee: MAN-GILL CHEMICAL COMPANY AN OH CORP
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Filing: 1975-02-13
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Granted: 1976-07-13
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Expires: 1995-02-13
Abstract
Abstract Aluminum surfaces are cleaned at low temperature by the addition of a polyalkylene glycol-abietic acid surfactant and a polyalkylene glycol-hydrocarbon surfactant to an aqueous acidic solution. Preferably, the solution contains fluoride as an accelerator.
Inventors
- 👤 Peter F. King
- 👤 Douglas D. Fekete
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:12
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/12; C23G1/125; C11; C11D; C11D1/00; C11D1/66; C11D1/72; C11D7/00; C11D7/02; C11D7/04; C11D7/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
96 words
An aqueous acidic composition suitable for the low temperature cleaning of aluminum surfaces comprising both a first hydrocarbon derivative surfactant having the general formula: R(or') n OH and a second abietic acid derivative surfactant having the general formula: A(r'o) n H wherein R is an alkyl or alkylaryl group of 8-22 carbon atoms; R' is a divalent radical selected from ethylene, propylene and combinations thereof; each n is an integer from 7 to 22; and A is the abietic acid radical; said surfactants being present in amounts sufficient to remove both readily emulsifiable and difficult-to-emulsify oils.
Claim 2
Dependent Claim
96 words
An aqueous acidic composition suitable for the low temperature cleaning of aluminum surfaces comprising both a first hydrocarbon derivative surfactant having the general formula: R(or') n OH and a second abietic acid derivative surfactant having the general formula: A(r'o) n H wherein R is an alkyl or alkylaryl group of 8-22 carbon atoms; R' is a divalent radical selected from ethylene, propylene and combinations thereof; each n is an integer from 7 to 22; and A is the abietic acid radical; said surfactants being present in amounts sufficient to remove both readily emulsifiable and difficult-to-emulsify oils.
Claim 3
Dependent Claim
18 words
The composition of claim 1, wherein each surfactant is present in a concentration of at least 0.01 wt.%.
Claim 4
Dependent Claim
21 words
The composition of claim 1, wherein the pH of the solution is adjusted to a value not in excess of 2.0.
Claim 5
Dependent Claim
18 words
The composition of claim 2, wherein each surfactant is present in a concentration of at least 0.05 wt.%.
Claim 6
Dependent Claim
18 words
The composition of claim 1, containing fluoride in an effective concentration of from 0.001 to 0.4 wt. %.
Claim 7
Dependent Claim
17 words
A process for cleaning an aluminum surface comprising contacting the surface with the composition of claim 1.
Claim 8
Dependent Claim
19 words
The process of claim 6, wherein the composition is maintained at a temperature not in excess of about 130°F.
Claim 9
Dependent Claim
22 words
The process of claim 6, wherein the composition is sprayed on the surface for a period of 10 seconds to 5 minutes.
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) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |