US4117237A
Expired / Lapsed
US
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Unsymmetrical sulfosuccinate diesters
Assignee: Witco Corp
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Filing: 1976-06-30
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Granted: 1978-09-26
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Expires: 1996-06-30
Abstract
Abstract Unsymmetrical sulfosuccinate diesters in which one carboxyl group of the sulfosuccinate is esterified with an alcohol, for instance, a C 8 -C 12 aliphatic monohydric such as octyl or dodecyl alcohol, or with an ethoxylated or propoxylated alkyl phenol, and in which the other carboxyl group is esterified by reaction with an α-monoepoxide such as propylene oxide, or higher α-epoxides. The said diesters have utility as surfactants, such as detergents and emulsifiers.
Inventors
- 👤 Kermit D. Longley
- 👤 Anastasios J. Karalis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:01
CPC Classifications
C; C07; C07C; C07C309/00; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
169 words
An unsymmetrical sulfosuccinate surfactant having the formula: ##STR9## where: R = C 1 -C 20 alkyl, or an alkylbenzene radical having at least 1, but not more than 3, nuclearly attached alkyl groups and at least 1, but not more than 2, of these alkyl groups containing 5 to 12 carbon atoms and the said such other alkyl group or groups, as may be present, containing 1 to 3 carbon atoms, R' = alkyl containing 1 to 18 carbon atoms or a benzene radical, R" = ethylene or propylene, x = 0 to 6 and is at least 1 when R = an alkylbenzene radical, with the proviso that the sum of the number of carbon atoms in R and R' is from 5 to 33 and that there is a difference in the number of carbon atoms in R and R' which difference is at least 4; and M is a cation selected from the group of alkali metals, ammonium, alkaline earth metals and water soluble organic amines.
Claim 2
Dependent Claim
169 words
An unsymmetrical sulfosuccinate surfactant having the formula: ##STR9## where: R = C 1 -C 20 alkyl, or an alkylbenzene radical having at least 1, but not more than 3, nuclearly attached alkyl groups and at least 1, but not more than 2, of these alkyl groups containing 5 to 12 carbon atoms and the said such other alkyl group or groups, as may be present, containing 1 to 3 carbon atoms, R' = alkyl containing 1 to 18 carbon atoms or a benzene radical, R" = ethylene or propylene, x = 0 to 6 and is at least 1 when R = an alkylbenzene radical, with the proviso that the sum of the number of carbon atoms in R and R' is from 5 to 33 and that there is a difference in the number of carbon atoms in R and R' which difference is at least 4; and M is a cation selected from the group of alkali metals, ammonium, alkaline earth metals and water soluble organic amines.
Claim 3
Dependent Claim
25 words
A surfactant according to claim 1, in which the difference in the number of carbon atoms between R and R' is from 6 to 16.
Claim 4
Dependent Claim
22 words
A surfactant according to claim 1, in which R is alkyl containing from 8 to 15 carbon atoms and R' is methyl.
Claim 5
Dependent Claim
14 words
A surfactant according to claim 3, in which R is a straight chain alkyl.
Claim 6
Dependent Claim
22 words
A surfactant according to claim 1, in which R contains from 3 to 18 carbon atoms and is a branched chain alkyl.
Claim 7
Dependent Claim
83 words
A surfactant according to claim 1, in which R-(OR") x -- is: ##STR10## where R 2 and R 3 are the same or dissimilar C 5 -C 12 alkyl radicals, R 4 is a C 1 -C 3 alkyl radical, R 5 is C 2 H 4 or C 3 H 6 , each of w, m, and n is zero to 1, subject to the proviso that, when w is zero, m is 1 or 2, and y is 1 to 6.
Claim 8
Dependent Claim
27 words
A surfactant according to claim 1, in which R-(OR") x-- is: ##STR11## where R 5 is C 2 H 4 , and y is 1 to 6.
Claim 9
Dependent Claim
30 words
A surfactant according to claim 1, in which R is a C 1 -C 3 alkyl radical, and R' is an alkyl radical containing from 6 to 10 carbon atoms.
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) | 1981-09-25 | 1982-03-27 | 1982-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-25 | 1986-03-27 | 1986-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-25 | 1990-03-27 | 1990-09-26 | $7700.00 | Window Closed / Lapsed |