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US4606840A
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Aqueous composition for the dispersion of hydrophobic substances, particularly applicable to the cleaning of objects soiled by paint or the like
Assignee: NATIONALE ELF AQUITAINE TOUR AQUITAINE Ste
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Filing: 1984-09-13
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Granted: 1986-08-19
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Expires: 2004-09-13
Abstract
Abstract Aqueous composition for the dispersion of hydrophobic substances, constituted by a microemulsion of one or more hydrocarbons, ketones and alcohols and/or glycol ethers or esters in the presence of a surfactant compound, in water, characterized in that the water has a pH of 8 to 14 and that the molar ratio of the carbonyl groups (--CO--) present to the hydrocarbon is from 0.2 to 1. Application of this composition to the removal of various paints, in particular to washing brushes; washing can be finished with water.
Inventors
- 👤 Jean-Claude Gautier
- 👤 Francois Lanore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:54
CPC Classifications
C; C11; C11D; C11D3/00; C09; C09D; C09D9/00; C09D9/005; C11D17/00; C11D17/0008; C11D17/0017; C11D17/0021; C11D3/43; C23; C23G; C23G5/00; C23G5/06
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
106 words
An aqueous composition for dispersing hydrophobic substances, which is miscible with water in any proportion without separation and which comprises an aqueous microemulsion containing at least one hydrocarbon or chlorocarbon, ketone, surfactant and cosurfactant, wherein the cosurfactant is selected from the group consisting of liquid mono-alcohols and gylcols and ethers and esters of liquid mono-alcohols and glycols, the molar ratio of carbonyl groups (--CO--) to hydrocarbon molecules is in the range from 0.2 to 1, the weight ratio of the surfactant to the cosurfactant is in the range from 0.5 to 2.6 and the microemulsion has a pH in the range of from 8 to 14.
Claim 2
Dependent Claim
106 words
An aqueous composition for dispersing hydrophobic substances, which is miscible with water in any proportion without separation and which comprises an aqueous microemulsion containing at least one hydrocarbon or chlorocarbon, ketone, surfactant and cosurfactant, wherein the cosurfactant is selected from the group consisting of liquid mono-alcohols and gylcols and ethers and esters of liquid mono-alcohols and glycols, the molar ratio of carbonyl groups (--CO--) to hydrocarbon molecules is in the range from 0.2 to 1, the weight ratio of the surfactant to the cosurfactant is in the range from 0.5 to 2.6 and the microemulsion has a pH in the range of from 8 to 14.
Claim 3
Dependent Claim
33 words
A composition according to claim 1, wherein the ketone contains 3 to 12 carbon atoms and the molar ratio of carbonyl groups to hydrocarbon molecules is in the range from 0.3 to 0.9.
Claim 4
Dependent Claim
21 words
A composition according to claim 1 or 2, wherein the microemulsion has a pH in the range from 10 to 13.5.
Claim 5
Dependent Claim
24 words
A composition according to claim 3, wherein the weight ratio of the surfactant to the cosurfactant is in the range from 0.8 to 2.2.
Claim 6
Dependent Claim
36 words
A composition according to claim 1 wherein the cosurfactant is an alcohol of 1 to 8 carbon atoms and the molar ratio of the alcohol to the hydrocarbon is in the range from 0.3 to 2.5.
Claim 7
Dependent Claim
33 words
A composition according to claim 5, wherein the alcohol contains 1 to 4 carbon atoms and the molar ratio of the alcohol to the hydrocarbon is in the range from 0.9 to 2.
Claim 8
Dependent Claim
38 words
A composition according to claim 1, wherein the cosurfactant is an ether or ester of a glycol containing 4 to 6 carbon atoms and its molar ratio to the hydrocarbon is in the range from 0.45 to 2.5.
Claim 9
Dependent Claim
20 words
A composition according to claim 7, wherein the cosurfactant is ethylene glycol mono-ethyl ether or ethylene glycol monoacetate mono-ethyl ether.
Claim 10
Dependent Claim
27 words
A composition according to claim 1, wherein the hydrocarbon is a C 1 to C 4 alkane or alkene having 1 to 3 chlorine atoms per molecule.
Claim 11
Dependent Claim
24 words
A composition according to claim 1, wherein the surfactant is selected from alkylaryl-sulphonates, alkali metal and alkaline earth metal alkyl sulphates and ethoxylated alkyl-phenols.
Claim 12
Dependent Claim
29 words
A composition according to claim 10, wherein the surfactant is present in the composition in an amount in the range from 0.1 to 0.6 mole per mole of ketone.
Claim 13
Dependent Claim
81 words
A composition according to claim 1, which comprises by weight 15% to 30% of at least one chlorinated C 1 to C 4 hydrocarbon, 4% to 15% of at least one C 3 to C 12 ketone, 6% to 15% of at least one C 1 to C 8 alcohol as the cosurfactant and 6% to 16% of surfactant, the balance being water, wherein the molar ratio of the alcohol to the hydrocarbon is in the range from 0.45 to 2.5.
Claim 14
Dependent Claim
140 words
An aqueous composition for cleaning objects soiled with hydrophobic substances, the composition being miscible with water in any proportion without separating into distinct phases, which comprises a microemulsion containing by weight 15% to 30% of at least one liquid hydrocarbon or chlorocarbon containing less than 13 carbon atoms, 4% to 15% of at least one C 3 to C 12 ketone, 6% to 15% of at least one cosurfactant selected from the group consisting of C 1 to C 8 alcohols, glycol ethers and glycol esters, and 6% to 16% of a surfactant, the balance being water having a pH of 8 to 14, wherein the weight ratio of the surfactant to the cosurfactant is in the range from 0.5 to 2.6 and the ketone is present in an amount providing 0.2 to 1 carbonyl group per mole of hydrocarbon.
Claim 15
Dependent Claim
140 words
An aqueous composition for cleaning objects soiled with hydrophobic substances, the composition being miscible with water in any proportion without separating into distinct phases, which comprises a microemulsion containing by weight 15% to 30% of at least one liquid hydrocarbon or chlorocarbon containing less than 13 carbon atoms, 4% to 15% of at least one C 3 to C 12 ketone, 6% to 15% of at least one cosurfactant selected from the group consisting of C 1 to C 8 alcohols, glycol ethers and glycol esters, and 6% to 16% of a surfactant, the balance being water having a pH of 8 to 14, wherein the weight ratio of the surfactant to the cosurfactant is in the range from 0.5 to 2.6 and the ketone is present in an amount providing 0.2 to 1 carbonyl group per mole of hydrocarbon.
Claim 16
Dependent Claim
70 words
An aqueous composition according to claim 13, comprising by weight 17% to 25% of at least one C 1 to C 4 chlorinated hydrocarbon, 6% to 12.5% of ketone, 7% to 15% of at least one C 1 to C 4 alcohol and 8% to 16% of surfactant, the balance being water, wherein the weight ratio of the surfactant to the cosurfactant is in the range from 0.8 to 2.2.
Claim 17
Dependent Claim
44 words
An aqueous composition according to claim 14 wherein the alcohol is selected from the group consisting of methanol, ethanol and monoethyl ether of ethylene glycol and the ketone is selected from the group consisting of methyl ethyl ketone, methyl isobutyl ketone and diacetone alcohol.
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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) | 1989-08-18 | 1990-02-17 | 1990-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-18 | 1994-02-17 | 1994-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-18 | 1998-02-17 | 1998-08-19 | $7700.00 | Window Closed / Lapsed |