Patent US4495092A successfully refreshed from Google Patents.
US4495092A
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Viscosity regulators for high-viscosity surfactant concentrates
Assignee: Henkel AG and Co KGaA
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Filing: 1984-02-06
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Granted: 1985-01-22
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Expires: 2004-02-06
Abstract
Abstract C 8 -C 40 Alcohols, or C 8 - C 40 alcohol containing one or more hydroxyl groups and onto which up to 20 moles of ethylene oxide and/or propylene oxide can be added per mole of alcohol, when added to aqueous industrial anionic surfactant concentrates, particularly concentrates of α-sulfofatty acid esters containing at least 50% by weight of the sodium salt of α-sulfofatty acid ester, significantly improve the rheological behavior thereof. The alcohols are added in quantities of from about 1 to about 15% by weight, based on the quantity of surfactant, whereupon the viscosity of the surfactant concentrate becomes at most 10,000 mPas at 70° C.
Inventors
- 👤 Karl H. Schmid
- 👤 Hans J. Rommerskirchen
- 👤 Herbert Reuter
- 👤 Wolfgang Seiter
- 👤 Robert Piorr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:05
CPC Classifications
C; C09; C09K; C09K23/00; C11; C11D; C11D3/00; C11D3/16; C11D3/20; C11D3/2003; C11D3/2006; C11D3/2027; C11D3/2031; C11D1/00; C11D1/02; C11D1/12; C11D1/28; C11D1/66; C11D1/72; C11D3/201; C11D3/2013; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
179 words
A process for the preparation of an aqueous concentrate of an α-sulfofatty acid ester comprising the steps of: (a) Sulfonating a fatty acid ester in the α-position with an excess of gaseous SO 3 to produce an α-sulfofatty acid ester; (b) removing most or all of the excess SO 3 from the α-sulfofatty acid ester; (c) adding to the α-sulfofatty acid ester (i) a monohydric or polyhydric alcohol containing from 8 to 40 carbon atoms or (ii) a reaction product a monohydric or polyhydric alcohol containing from 8 to 40 carbon atoms of with from 1 to 20 moles of ethylene oxide, propylene oxide, or a mixture of ethylene oxide and propylene oxide, per mole of alcohol; (d) neutralizing the α-sulfofatty acid ester with concentrated aqueous alkali metal hydroxide solution wherein said solution is at a concentration sufficient to produce an α-sulfofatty acid ester concentration of at least 50% by weight; and wherein the alcohol in step (c) is added in quantity sufficient to produce a viscosity of the aqueous concentrate of less than 10,000 mPas at 70° C.
Claim 2
Dependent Claim
179 words
A process for the preparation of an aqueous concentrate of an α-sulfofatty acid ester comprising the steps of: (a) Sulfonating a fatty acid ester in the α-position with an excess of gaseous SO 3 to produce an α-sulfofatty acid ester; (b) removing most or all of the excess SO 3 from the α-sulfofatty acid ester; (c) adding to the α-sulfofatty acid ester (i) a monohydric or polyhydric alcohol containing from 8 to 40 carbon atoms or (ii) a reaction product a monohydric or polyhydric alcohol containing from 8 to 40 carbon atoms of with from 1 to 20 moles of ethylene oxide, propylene oxide, or a mixture of ethylene oxide and propylene oxide, per mole of alcohol; (d) neutralizing the α-sulfofatty acid ester with concentrated aqueous alkali metal hydroxide solution wherein said solution is at a concentration sufficient to produce an α-sulfofatty acid ester concentration of at least 50% by weight; and wherein the alcohol in step (c) is added in quantity sufficient to produce a viscosity of the aqueous concentrate of less than 10,000 mPas at 70° C.
Claim 3
Dependent Claim
33 words
A process in accordance with claim 1 wherein the quantity of alcohol in step (c) is from about 1 to about 15% by weight, based on the weight of the α-sulfofatty acid ester.
Claim 4
Dependent Claim
24 words
A process in accordance with claim 2 wherein the quantity of alcohol in step (c) is from about 5 to about 12% by weight.
Claim 5
Dependent Claim
22 words
A process in accordance with claim 1 wherein the alcohol in step (c) is a mixture of saturated and unsaturated fatty alcohols.
Claim 6
Dependent Claim
32 words
A process in accordance with claim 4 wherein the alcohol in step (c) is a reaction product with from 1 to 8 moles of ethylene oxide, propylene oxide, or a mixture thereof.
Claim 7
Dependent Claim
47 words
A process in accordance with claim 5 wherein the mixture of saturated and unsaturated fatty alcohols is at least 80% by weight C 16 -C 18 fatty alcohols and is a reaction product with about 1 mole of propylene oxide and about 6 moles of ethylene oxide.
Claim 8
Dependent Claim
18 words
A process in accordance with claim 1 wherein the alcohol in step (c) contains a branched carbon chain.
Claim 9
Dependent Claim
32 words
A process in accordance with claim 7 wherein the alcohol in step (c) is a reaction product with from 1 to 15 moles of ethylene oxide, propylene oxide, or a mixture thereof.
Claim 10
Dependent Claim
23 words
A process in accordance with claim 1 wherein the alcohol in step (c) contains a total of from 2 to 6 hydroxyl groups.
Claim 11
Dependent Claim
26 words
A process in accordance with claim 9 wherein the alcohol in step (c) is a reaction product with from 10 to 15 moles of ethylene oxide.
Claim 12
Dependent Claim
99 words
A composition in concentrated aqueous form comprising at least 50% by weight of an α-sulfofatty acid ester surfactant and (i) a monohydric or polyhydric alcohol containing from 8 to 40 carbon atoms or (ii) a reaction product of a monohydric or polyhydric alcohol containing from 8 to 40 carbon atoms. with from 1 to 20 moles of ethylene oxide, propylene oxide, or a mixture of ethylene oxide and propylene oxide, per mole of alcohol; said alcohol being present in an amount sufficient to reduce the viscosity of the surfactant concentrate to no more than 10,000 mPas at 70° C.
Claim 13
Dependent Claim
99 words
A composition in concentrated aqueous form comprising at least 50% by weight of an α-sulfofatty acid ester surfactant and (i) a monohydric or polyhydric alcohol containing from 8 to 40 carbon atoms or (ii) a reaction product of a monohydric or polyhydric alcohol containing from 8 to 40 carbon atoms. with from 1 to 20 moles of ethylene oxide, propylene oxide, or a mixture of ethylene oxide and propylene oxide, per mole of alcohol; said alcohol being present in an amount sufficient to reduce the viscosity of the surfactant concentrate to no more than 10,000 mPas at 70° C.
Claim 14
Dependent Claim
29 words
A composition in accordance with claim 11 wherein the viscosity reducing quantity of alcohol is from about 1 to about 15% by weight, based on the weight of surfactant.
Claim 15
Dependent Claim
23 words
A composition in accordance with claim 11 wherein the viscosity reducing quantity of alcohol is from about 5 to about 12% by weight.
Claim 16
Dependent Claim
19 words
A composition in accordance with claim 11 wherein the alcohol is a mixture of saturated and unsaturated fatty alcohols.
Claim 17
Dependent Claim
29 words
A composition in accordance with claim 14 wherein said alcohol is a reaction product with from 1 to 8 moles of ethylene oxide, propylene oxide, or a mixture thereof.
Claim 18
Dependent Claim
47 words
A composition in accordance with claim 14 wherein the mixture of saturated and unsaturated fatty alcohols is at least 80% by weight C 16 -C 18 fatty alcohols and is a reaction product with about 1 mole of propylene oxide and about 6 moles of ethylene oxide.
Claim 19
Dependent Claim
15 words
A composition in accordance with claim 11 wherein the alcohol contains a branched carbon chain.
Claim 20
Dependent Claim
29 words
A composition in accordance with claim 17 wherein the alcohol is a reaction product with from 1 to 15 moles of ethylene oxide, propylene oxide, or a mixture thereof.
Claim 21
Dependent Claim
20 words
A composition in accordance with claim 11 wherein the alcohol contains a total of from 2 to 6 hydroxyl groups.
Claim 22
Dependent Claim
23 words
A composition in accordance with claim 11 wherein the alcohol is a reaction product with from 10 to 15 moles of ethylene oxide.
Claim 23
Dependent Claim
35 words
A composition in accordance with claim 11 which also contains from about 0.5 to about 5% by weight, based on the weight of surfactant, of a water soluble alkali or alkaline earth metal inorganic salt.
References Cited (Backward Citations)
US3413221A
Cited
US3274117A
Cited
US3393213A
Cited
DE2326006A1
Cited
US3954643A
Cited
EP0024711A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-01-22 | 1988-07-23 | 1989-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-22 | 1992-07-23 | 1993-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-22 | 1996-07-23 | 1997-01-22 | $7700.00 | Window Closed / Lapsed |