US4735735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Salts of esters of long-chain fatty alcohols with alpha-sulfofatty acids as corrosion inhibitors in oils or oil emulsions
Assignee: Henkel AG and Co KGaA
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Filing: 1987-05-22
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Granted: 1988-04-05
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Expires: 2007-05-22
Abstract
Abstract A method for corrosion inhibition in oil or oil emulsions comprising adding thereto a corrosion-inhibition-effective amount of at least one salt corresponding to the general formula ##STR1## in which R 1 is a linear or branched C 8-36 alkyl or C 8-36 alkenyl or a mono- or polyethoxylated C 8-18 alkyl containing from 1 to 10 ethoxy groups, R 2 is a linear or branched C 10-20 alkyl and M is half an equivalent of a divalent metal which is magnesium, calcium, barium, or zinc.
Inventors
- 👤 Gerhard Borggrefe
- 👤 Robert Piorr
- 👤 Alfred Struve
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:53
CPC Classifications
C; C10; C10M; C10M173/00; C10M135/00; C10M135/08; C10M135/10; C10M2201/00; C10M2201/02; C10M2219/00; C10M2219/04; C10M2219/044; C10N; C10N2030/00; C10N2030/12; C10N2040/00; C10N2040/08; C10N2040/20; C10N2050/00; C10N2050/01
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
76 words
A method for corrosion inhibition comprising adding to an oil or oil-containing emulsion a corrosion-inhibition-effective amount of at least one compound of the formula ##STR5## wherein: R 1 is a linear or branched C 8-36 alkyl, C 8-36 alkenyl, or a C 8-18 alkyl ethoxylated with about 1 to 10 moles of ethylene oxide; R 2 is a linear or branched C 10-20 alkyl; and M is a half equivalent of magnesium, calcium, barium, or zinc.
Claim 2
Independent Claim
76 words
A method for corrosion inhibition comprising adding to an oil or oil-containing emulsion a corrosion-inhibition-effective amount of at least one compound of the formula ##STR5## wherein: R 1 is a linear or branched C 8-36 alkyl, C 8-36 alkenyl, or a C 8-18 alkyl ethoxylated with about 1 to 10 moles of ethylene oxide; R 2 is a linear or branched C 10-20 alkyl; and M is a half equivalent of magnesium, calcium, barium, or zinc.
Claim 3
Dependent Claim
27 words
The method of claim 1 wherein said compound is present in about 0.05 to 10.0% by weight, based upon the weight of the oil to be treated.
Claim 4
Dependent Claim
27 words
The method of claim 1 wherein said compound is present in about 0.5 to 5.0% by weight, based upon the weight of the oil to be treated.
Claim 5
Dependent Claim
25 words
The method of claim 1 wherein said oil or oil-containing emulsion is a lubricating oil, lubricating grease, transmission oil, or mineral oil based machine oil.
Claim 6
Dependent Claim
16 words
The method of claim 1 wherein R 1 is at least one linear C 8-22 alkyl.
Claim 7
Dependent Claim
16 words
The method of claim 5 wherein R 1 is a mixture of several of said alkyls.
Claim 8
Dependent Claim
16 words
The method of claim 1 wherein R 1 is a mixture of several of said alkyls.
Claim 9
Dependent Claim
15 words
The method of claim 1 wherein R 1 is a mixture of C 12-18 alkyls.
Claim 10
Dependent Claim
15 words
The method of claim 1 wherein R 1 is a mixture of cetyl and oleyl.
Claim 11
Dependent Claim
18 words
The method of claim 1 wherein R 1 is at least one branched alkyl of a Guerbet alcohol.
Claim 12
Dependent Claim
25 words
The method of claim 1 wherein R 1 is at least one C 12-18 alkyl ethoxylate with about 3 to 6 moles of ethylene oxide.
Claim 13
Dependent Claim
15 words
The method of claim 1 wherein R 2 is an even-numbered linear C 10-16 alkyl.
Claim 14
Dependent Claim
15 words
The method of claim 5 wherein R 2 is an even-numbered linear C 10-16 alkyl.
Claim 15
Dependent Claim
15 words
The method of claim 6 wherein R 2 is an even-numbered linear C 10-16 alkyl.
Claim 16
Dependent Claim
15 words
The method of claim 7 wherein R 2 is an even-numbered linear C 10-16 alkyl.
Claim 17
Dependent Claim
15 words
The method of claim 8 wherein R 2 is an even-numbered linear C 10-16 alkyl.
Claim 18
Dependent Claim
15 words
The method of claim 9 wherein R 2 is an even-numbered linear C 10-16 alkyl.
Claim 19
Dependent Claim
15 words
The method of claim 10 wherein R 2 is an even-numbered linear C 10-16 alkyl.
Claim 20
Dependent Claim
15 words
The method of claim 11 wherein R 2 is an even-numbered linear C 10-16 alkyl.
Claim 21
Dependent Claim
25 words
The method of claim 3 wherein R 1 is a mixture of cetyl and oleyl and R 2 is an even-numbered linear C 10-16 alkyl.
References Cited (Backward Citations)
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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) | 1991-04-05 | 1991-10-05 | 1992-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-05 | 1995-10-05 | 1996-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-05 | 1999-10-05 | 2000-04-05 | $7700.00 | Window Closed / Lapsed |