US4675128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkane sulfonates as viscosity regulators
Assignee: Henkel AG and Co KGaA
•
Filing: 1985-12-18
•
Granted: 1987-06-23
•
Expires: 2005-12-18
Abstract
Abstract Alkali metal alkane sulfonates containing on averge 11 to 21 carbon atoms are used as viscosity regulators for aqueous, highly concentrated commercial anionic surfactant concentrates, more especially for alpha -sulfofatty acid ester salt concentrates containing at least 30% by weight of alpha -sulfofatty acid ester salt. The viscosity regulators are used in quantities of from 0.5 to 10% by weight, based on the surfactant content, so that the concentrates have a viscosity at 40 DEG C. of at most 10,000 mPas.
Inventors
- 👤 Karl-Heinz Linde
- 👤 Dietrich Kloetzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:42
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/02; C11D1/37; C11D1/12; C11D1/28; C11D1/14; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
60 words
An aqueous anionic surfactant concentrate comprising: A. at least about 30% by weight of an α-sulfofatty acid ester salt; and B. at least one alkali metal alkane sulfonate having on average from 11 to 21 carbon atoms which is present in an amount sufficient to reduce the viscosity of the concentrate to no greater than 10,000 mPas at 40° C.
Claim 2
Dependent Claim
60 words
An aqueous anionic surfactant concentrate comprising: A. at least about 30% by weight of an α-sulfofatty acid ester salt; and B. at least one alkali metal alkane sulfonate having on average from 11 to 21 carbon atoms which is present in an amount sufficient to reduce the viscosity of the concentrate to no greater than 10,000 mPas at 40° C.
Claim 3
Dependent Claim
29 words
A concentrate of claim 1 wherein component B is present in an amount of from about 0.5 to about 10% by weight, based on the weight of component A.
Claim 4
Dependent Claim
24 words
A concentrate of claim 1 wherein the α-sulfofatty acid ester salt is an alkali metal or ammonium salt of α-sulfotallow fatty acid methyl ester.
Claim 5
Dependent Claim
13 words
A concentrate of claim 1 wherein component B is a sodium alkane sulfonate.
Claim 6
Dependent Claim
21 words
A concentrate of claim 1 wherein component B contains from about 15 to about 50% by weight of disulfonates and/or polysulfonates.
Claim 7
Dependent Claim
14 words
A concentrate of claim 1 wherein component B comprises salts of alkane monosulfonic acids.
Claim 8
Dependent Claim
28 words
A concentrate of claim 1 wherein said alkane sulfonate comprises a combination of alkane sulfonates having average chain lengths of 13, 15 and 20 to 21 carbon atoms.
Claim 9
Dependent Claim
34 words
A concentrate of claim 1 wherein component A is derived from fatty acids containing from 10 to 20 carbon atoms and from aliphatic alcohols containing from 1 to 10 carbon atoms in the molecule.
Claim 10
Dependent Claim
68 words
A process for reducing the viscosity of an aqueous anionic surfactant concentrate comprising at least about 30% by weight of an α-sulfofatty acid ester salt; said process comprising adding to said concentrate at least one alkali metal alkane sulfonate having on average from 11 to 21 carbon atoms in an amount sufficient to reduce the viscosity of said concentrate to no greater than 10,000 mPas at 40° C.
Claim 11
Dependent Claim
68 words
A process for reducing the viscosity of an aqueous anionic surfactant concentrate comprising at least about 30% by weight of an α-sulfofatty acid ester salt; said process comprising adding to said concentrate at least one alkali metal alkane sulfonate having on average from 11 to 21 carbon atoms in an amount sufficient to reduce the viscosity of said concentrate to no greater than 10,000 mPas at 40° C.
Claim 12
Dependent Claim
26 words
A process of claim 9 wherein the viscosity reducing amount is from about 0.5 to about 10% by weight, based on the weight of anionic surfactant.
Claim 13
Dependent Claim
24 words
A process of claim 9 wherein said α-sulfofatty acid ester salt is an alkali metal or ammonium salt of α-sulfotallow fatty acid methyl ester.
Claim 14
Dependent Claim
13 words
A process of claim 9 wherein said alkane sulfonate comprises sodium alkane sulfonate.
Claim 15
Dependent Claim
22 words
A procss of claim 9 wherein said alkane sulfonate contains from about 15 to about 50% by weight of disulfonates and/or polysulfonates.
Claim 16
Dependent Claim
15 words
A process of claim 9 wherein said alkane sulfonate comprises salts of alkane monosulfonic acid.
Claim 17
Dependent Claim
28 words
A process of claim 9 wherein said alkane sulfonate comprises a combination of alkane sulfonates having average chain lengths of 13, 15 and 20 to 21 carbon atoms.
Claim 18
Dependent Claim
37 words
A process of claim 9 wherein said α-sulfofatty acid ester salt is derived from fatty acids containing from 10 to 20 carbon atoms and from aliphatic alcohols containing from 1 to 10 carbon atoms in the molecule.
References Cited (Backward Citations)
US3527707A
Cited
US3741913A
Cited
US3676374A
Cited
US3893955A
Cited
US3899448A
Cited
GB1437089A
Cited
JPS5379904A
Cited
US4239641A
Cited
US4384978A
Cited
US4495092A
Cited
JPS64209A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-22 | 1990-12-22 | 1991-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-22 | 1994-12-22 | 1995-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-22 | 1998-12-22 | 1999-06-23 | $7700.00 | Window Closed / Lapsed |