SELF-INVERTIBLE INVERSE LATEX COMPRISING, AS AN INVERTING AGENT, SURFACTANT SPECIES OF THE POLYGLYCEROL ESTER FAMILY, USE THEREOF AS A THICKENING AGENT, AND AQUEOUS LIQUID DETERGENT COMPOSITIONS COMPRISING SAME FOR HOUSEHOLD OR INDUSTRIAL USE

Abstract

Disclosed is a self-invertible inverse latex including, as an inverting agent, surfactant species of the polyglycerol ester family, the use thereof as a thickening and/or emulsifying and/or stabilising agent for a detergent or cleaning formulation for industrial or household use, and aqueous liquid detergent compositions including same, for household or industrial use.

Claims

1. A self-invertible inverse latex of a crosslinked anionic polyelectrolyte (P) comprising, per 100 mol %: (a.sub.1)a proportion of greater than or equal to 30 mol % and less than or equal to 100 mol %, of monomer units derived from 2-methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid in free acid or partially or totally salified form; (a.sub.2)a proportion of greater than 0 mol % and less than or equal to 70%, of monomer units derived from at least one monomer chosen from the elements of the group consisting of acrylic acid, methacrylic acid, 2-carboxyethylacrylic acid, itaconic acid, maleic acid, 3-methyl-3-[(1-oxo-2-propenyl)amino]butanoic acid, the carboxylic function of said monomers being in free acid, partially or totally salified form, and/or from the elements of the group consisting of (2-hydroxyethyl) acrylate, (2,3-dihydroxypropyl) acrylate, (2-hydroxyethyl) methacrylate, (2,3-dihydroxypropyl) methacrylate or vinylpyrrolidone; (a.sub.3)a proportion of greater than 0 mol % and less than or equal to 1 mol %, of monomer units derived from at least one diethylenic or polyethylenic crosslinking monomer (AR); the sum of said molar proportions of monomer units according to a.sub.1), a.sub.2) and a.sub.3) being equal to 100 mol %; said self-invertible inverse latex being an emulsion of water-in-oil type (E) comprising, per 100% of its mass: a)from 10% by mass to 90% by mass of said crosslinked anionic polyelectrolyte (P); b)from 5% by mass to 50% by mass of a fatty phase consisting of at least one oil (H); c)from 1% by mass to 50% by mass of water; d)from 0.5% by mass to 10% by mass of an emulsifying system of water-in-oil type (S.sub.1); and e)from 2% by mass to 10% by mass of an emulsifying system of oil-in-water type (S.sub.2); the sum of the mass proportions of compounds according to a), b), c), d) and e) being equal to 100% by mass; wherein said emulsifying system of oil-in-water type (S2) comprises, per 100% of its mass: f)a proportion of greater than or equal to 50% by mass and less than or equal to 100% by mass of a composition (Ce) comprising, per 100% of its mass: e.sub.1)from 10% by mass to 60% by mass of at least one compound of formula (I):
HO[CH.sub.2CH(OH)CH.sub.2O].sub.nH(I) in which n represents an integer greater than or equal to 1 and less than or equal to 15; e.sub.2)from 40% by mass to 90% by mass of at least one compound of formula (II):
R.sub.1(CO)[OCH.sub.2CH(OH)CH.sub.2].sub.pOH(II), in which p, which is different from or identical to n, represents an integer greater than or equal to 1 and less than or equal to 15; and in which the group R.sub.1(CO) represents a saturated or unsaturated, linear or branched aliphatic radical including from 6 to 22 carbon atoms; and e.sub.3)up to 30% by mass of at least one composition (C.sub.11) represented by formula (III):
HO[CH.sub.2CHOHCH.sub.2O].sub.q-(G).sub.r-H(III), in which q, which is different from or identical to n, represents an integer greater than or equal to 1 and less than or equal to 3, G represents a reducing sugar residue and r represents a decimal number greater than or equal to 1.05 and less than or equal to 5.00; said composition (C.sub.11) consisting of a mixture of the compounds of formulae (III.sub.1), (III.sub.2), (III.sub.3), (III.sub.4) and (III.sub.5):
HO[CH.sub.2CHOHCH.sub.2O].sub.qO-(G).sub.1-H(III.sub.1),
HO[CH.sub.2CHOHCH.sub.2O].sub.qO-(G).sub.2-H(III.sub.2),
HO[CH.sub.2CHOHCH.sub.2O].sub.qO-(G).sub.3-H(III.sub.3),
HO[CH.sub.2CHOHCH.sub.2O].sub.qO-(G).sub.4-H(III.sub.4),
HO[CH.sub.2CHOHCH.sub.2O].sub.qO-(G).sub.5-H(III.sub.5), in molar proportions of said compounds of formulae (III.sub.1), (III.sub.2), (III.sub.3), (III.sub.4) and (III.sub.5) respectively equal to a.sub.1, a.sub.2, a.sub.3, a.sub.4 and a.sub.5, such that the sum a.sub.1+a.sub.2+a.sub.3+a.sub.4+a.sub.5 is equal to 1, and such that the sum a.sub.1+2a.sub.2+3a.sub.3+4a.sub.4+5a.sub.5 is equal to r; the sum of the mass proportions of compounds according to e.sub.1), e.sub.2) and e.sub.3) being equal to 100% by mass.

2. The self-invertible inverse latex as defined in claim 1, wherein said crosslinked anionic polyelectrolyte (P) is a homopolymer of 2-methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid partially or totally salified in the sodium salt or ammonium salt form, crosslinked with triallylamine and/or methylenebis(acrylamide); a copolymer of 2-methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid and of acrylic acid which are partially or totally salified in the sodium salt or ammonium salt form, crosslinked with triallylamine and/or methylenebis(acrylamide); a copolymer of 2-methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid () partially or totally salified in the sodium salt form and of acrylic acid () partially or totally salified in the sodium salt form in a mole ratio ()/() of greater than or equal to 30/70 and less than or equal to 90/10, crosslinked with triallylamine and/or methylenebis(acrylamide); or a copolymer of 2-methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid () partially or totally salified in the sodium salt form and of acrylic acid () partially or totally salified in the sodium salt form in a mole ratio ()/() of greater than or equal to 40/60 and less than or equal to 90/10, crosslinked with triallylamine and/or methylenebis(acrylamide).

3. The self-invertible inverse latex as defined in either of claim 1, wherein in formula (I) as defined previously, n represents an integer greater than or equal to 1 and less than or equal to 10, and wherein, in formula (II) as defined previously, p, which may be identical to or different from n, represents an integer greater than or equal to 1 and less than or equal to 10, and the group R.sub.1(CO) is chosen from octanoyl, decanoyl, -undecylenoyl, dodecanoyl, tetradecanoyl, hexadecanoyl, octadecanoyl, 9-octadecenoyl and 9,12-octadecadienoyl radicals.

4. The self-invertible inverse latex as defined in claim 1, wherein, in said emulsifying system of oil-in water type (S.sub.2), said composition (C.sub.e) as defined previously consists of, per 100% of its mass: e.sub.1)from 10% by mass to 60% by mass of at least one compound of formula (I) as defined previously and e.sub.2)from 40% by mass to 90% by mass of at least one compound of formula (II) as defined previously.

5. The self-invertible inverse latex as defined in claim 1, wherein, in formula (III) as defined previously, q is equal to 1, G represents a glucose residue and r represents a decimal number greater than or equal to 1.05 and less than or equal to 2.5.

6. The self-invertible inverse latex as defined in claim 1, wherein, in said emulsifying system of oil-in water type (S.sub.2), said composition (C.sub.e) as defined previously consists of, per 100% of its mass: e.sub.1)from 5% by mass to 15% by mass of at least one compound of formula (I) as defined previously, e.sub.2)from 60% by mass to 80% by mass of at least one compound of formula (II) as defined previously, and e.sub.3)from 5% by mass to 15% by mass of at least one composition (C.sub.11) represented by formula (III) as defined previously.

7. The inverse latex as defined in claim 1, wherein said emulsifying system of oil-in water type (S.sub.2) is said composition (C.sub.e) as defined previously.

8. A composition (CO comprising, per 100% of its mass: e.sub.1)from 10% by mass to 60% by mass of at least one compound of formula (I):
HO[CH.sub.2CH(OH)CH.sub.2O].sub.nH(I) in which n represents an integer greater than or equal to 1 and less than or equal to 15; e.sub.2)from 40% by mass to 90% by mass of at least one compound of formula (II):
R.sub.1(CO)[OCH.sub.2CH(OH)CH.sub.2].sub.pOH(II), and in which p, which is different from or identical to n, represents an integer greater than or equal to 1 and less than or equal to 15 and the group R.sub.1(CO) represents a saturated or unsaturated, linear or branched aliphatic radical including from 6 to 22 carbon atoms; the sum of the mass proportions of compounds according to e.sub.1) and e.sub.2) being equal to 100% by mass.

9. The composition (CO as defined in claim 8, wherein, in formula (I) as defined previously, n represents an integer greater than or equal to 1 and less than or equal to 10, and wherein, in formula (II) as defined previously, p, which may be identical to or different from n, represents an integer greater than or equal to 1 and less than or equal to 10, and the group R.sub.1(CO) is chosen from octanoyl, decanoyl, -undecylenoyl, dodecanoyl, tetradecanoyl, hexadecanoyl, octadecanoyl, 9-octadecenoyl and 9,12-octadecadienoyl radicals.

10. The composition (C.sub.e) as defined in claim 8, consisting of, per 100% of its mass: e.sub.1)from 10% by mass to 60% by mass of at least one compound of formula (I) as defined previously and e.sub.2)from 40% by mass to 90% by mass of at least one compound of formula (II) as defined previously.

11. The composition (C.sub.e) as defined in claim 8, characterized in that, in formula (III) as defined previously, q is equal to 1, G represents a glucose residue and r represents a decimal number greater than or equal to 1.05 and less than or equal to 2.5.

12. The composition (C.sub.e) as defined in claim 8, consisting of, per 100% of its mass: e.sub.1)from 5% by mass to 15% by mass of at least one compound of formula (I) as defined previously, e.sub.2)from 60% by mass to 80% by mass of at least one compound of formula (II) as defined previously, and e.sub.3)from 5% by mass to 15% by mass of at least one composition (C.sub.11) represented by formula (III) as defined previously.

13. A method of thickening, and or emulsifying, and/or stabilizing a detergent liquid aqueous composition for household or industrial use, comprising adding an effective amount of said self-invertible inverse latex as defined in claim 1 to the detergent liquid aqueous composition.

14. A detergent liquid aqueous composition (F) for household or industrial use, comprising as thickener, per 100% of its total mass, between 0.1% and 10% by mass of said self-invertible inverse latex as defined in claim 1.

15. (canceled)

16. A process for cleaning a hard surface, comprising at least one step a1) of applying said detergent liquid aqueous composition (F) as defined in claim 14, followed by at least one step b1) of rinsing said hard surface.

17. A self-invertible inverse latex of a crosslinked anionic polyelectrolyte (P) comprising, per 100 mol %: (a.sub.1)a proportion of greater than or equal to 30 mol % and less than or equal to 100 mol %, of monomer units derived from 2-methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid in free acid or partially or totally salified form; and (a.sub.2)a proportion of greater than 0 mol % and less than or equal to 1 mol %, of monomer units derived from at least one diethylenic or polyethylenic crosslinking monomer (AR); the sum of said molar proportions of monomer units according to a.sub.1) and a.sub.2) being equal to 100 mol %; said self-invertible inverse latex being an emulsion of water-in-oil type (E) comprising, per 100% of its mass: a)from 10% by mass to 90% by mass of said crosslinked anionic polyelectrolyte (P); b)from 5% by mass to 50% by mass of a fatty phase consisting of at least one oil (H); c)from 1% by mass to 50% by mass of water; d)from 0.5% by mass to 10% by mass of an emulsifying system of water-in-oil type (S.sub.1); and e)from 2% by mass to 10% by mass of an emulsifying system of oil-in-water type (S.sub.2); the sum of the mass proportions of compounds according to a), b), c), d) and e) being equal to 100% by mass; wherein said emulsifying system of oil-in-water type (S.sub.2) comprises, per 100% of its mass: f)a proportion of greater than or equal to 50% by mass and less than or equal to 100% by mass of a composition (Ce) comprising, per 100% of its mass: e.sub.1)from 10% by mass to 60% by mass of at least one compound of formula (I):
HO[CH.sub.2CH(OH)CH.sub.2O].sub.nH(I) in which n represents an integer greater than or equal to 1 and less than or equal to 15; e.sub.2)from 40% by mass to 90% by mass of at least one compound of formula (II):
R.sub.1(CO)[OCH.sub.2CH(OH)CH.sub.2].sub.pOH(II), and in which p, which is different from or identical to n, represents an integer greater than or equal to 1 and less than or equal to 15; and in which the group R.sub.1(CO) represents a saturated or unsaturated, linear or branched aliphatic radical including from 6 to 22 carbon atoms; the sum of the mass proportions of compounds according to e.sub.1) and e.sub.2) being equal to 100% by mass.

18. The self-invertible inverse latex as defined in either of claim 17, wherein, in formula (I) as defined previously, n represents an integer greater than or equal to 1 and less than or equal to 10, and wherein, in formula (II) as defined previously, p, which may be identical to or different from n, represents an integer greater than or equal to 1 and less than or equal to 10, and the group R.sub.1(CO) is chosen from octanoyl, decanoyl, -undecylenoyl, dodecanoyl, tetradecanoyl, hexadecanoyl, octadecanoyl, 9-octadecenoyl and 9,12-octadecadienoyl radicals.

19. The self-invertible inverse latex as defined in claim 18, wherein, in said emulsifying system of oil-in water type (S.sub.2), said composition (C.sub.e) as defined previously consists of, per 100% of its mass: e.sub.1)from 10% by mass to 60% by mass of at least one compound of formula (I) as defined previously and e.sub.2)from 40% by mass to 90% by mass of at least one compound of formula (II) as defined previously.

20. The composition of claim 8, further comprising: e.sub.3)up to 30% by mass of at least one composition (C.sub.11) represented by formula (III):
HO[CH.sub.2CHOHCH.sub.2O].sub.q-(G).sub.r-H(III), in which formula (III) q, which may be identical to or different from n, represents an integer greater than or equal to 1 and less than or equal to 3, G represents a reducing sugar residue and r represents a decimal number greater than or equal to 1.05 and less than or equal to 5.00, said composition (C.sub.11) consisting of a mixture of the compounds of formulae (III.sub.1), (III.sub.2), (III.sub.3), (III.sub.4) and (III.sub.5):
HO[CH.sub.2CHOHCH.sub.2O].sub.qO-(G).sub.1-H(III.sub.1),
HO[CH.sub.2CHOHCH.sub.2O].sub.qO-(G).sub.2-H(III.sub.2),
HO[CH.sub.2CHOHCH.sub.2O].sub.qO-(G).sub.3-H(III.sub.3),
HO[CH.sub.2CHOHCH.sub.2O].sub.qO-(G).sub.4-H(III.sub.4),
HO[CH.sub.2CHOHCH.sub.2O].sub.qO-(G).sub.5-H(III.sub.5), in molar proportions of said compounds of formulae (III.sub.1), (III.sub.2), (III.sub.3), (III.sub.4) and (III.sub.5) respectively equal to a.sub.1, a.sub.2, a.sub.3, a.sub.4 and a.sub.5, such that the sum a.sub.1+a.sub.2+a.sub.3+a.sub.4+a.sub.5 is equal to 1, and such that the sum a.sub.1+2a.sub.2+3a.sub.3+4a.sub.4+5a.sub.5 is equal to r; the sum of the mass proportions of compounds according to e.sub.1), e.sub.2) and e.sub.3) being equal to 100% by mass.

21. The composition (C.sub.e) as defined in claim 20, wherein, in formula (I) as defined previously, n represents an integer greater than or equal to 1 and less than or equal to 10, and wherein, in formula (II) as defined previously, p, which may be identical to or different from n, represents an integer greater than or equal to 1 and less than or equal to 10, and the group R.sub.1(CO) is chosen from octanoyl, decanoyl, -undecylenoyl, dodecanoyl, tetradecanoyl, hexadecanoyl, octadecanoyl, 9-octadecenoyl and 9,12-octadecadienoyl radicals.

Description

DESCRIPTION OF THE PREFERRED EMBODIMENTS

IPreparation of Surfactant Compositions According to the Invention and Comparative Compositions

I.SUB.A.Preparation of a Composition Comprising Glyceryl Polyglucoside and Glycerol

[0151] 650 g of glycerol, i.e. 5 molar equivalents, are introduced into a jacketed glass reactor, in which jacket circulates a heat-transfer fluid, and equipped with an efficient stirrer. The glycerol is heated to a temperature of about 100 C.

[0152] 423.9 g, i.e. 1 molar equivalent, of glucose are then added gradually to the reaction medium to enable its homogeneous dispersion. An acidic catalytic system consisting of 0.51 g of 98% sulfuric acid is added to the mixture thus obtained.

[0153] The reaction medium is placed under a partial vacuum of 30 mbar, and maintained at a temperature of 100 C. to 105 C. for 4 hours with removal of the water formed by means of a distillation assembly.

[0154] The reaction medium is then cooled to 95 C.-100 C. and neutralized with 30% sodium hydroxide to bring the pH of a 1% solution of this mixture to a value of about 7.0.

[0155] The reaction mixture is emptied out to obtain the reference composition (E.sub.IB).

The analytical characteristics of composition (E.sub.IB) thus obtained are as follows: [0156] Appearance (visual): clear liquid; [0157] pH of 1% solution: 6.8; [0158] Residual glycerol: 55.1%; [0159] Residual glucose: <1%; [0160] Glyceryl polyglucosides: 44.7%
I.sub.BPreparation of Composition (EM.sub.2) Based on Decaglyceryl Laurate (EM.sub.1) and Hexaglycerol

[0161] 71.5 g of decaglyceryl monolaurate sold under the brand name Decaglyn 1-L (referred to hereinbelow as Composition (EM.sub.1)) and 28.5 g of polyglycerol-6 (sold under the brand name Polyglycerol-6 by the company Spiga) are introduced into a jacketed glass reactor, in which jacket circulates a heat-transfer fluid, and equipped with an efficient mechanical stirrer, at a temperature of 35 C. with anchor-type mechanical stirring at a speed of 80 rpm. After stirring under such conditions for 30 minutes, the mixture is emptied out to obtain composition (EM.sub.2).

I.sub.CPreparation of Composition (EM.sub.3) Based on Decaglyceryl Laurate (EM.sub.1) and Decaglycerol

[0162] 71.5 g of decaglyceryl monolaurate sold under the brand name Decaglyn 1-L (referred to hereinbelow as Composition (EM.sub.1)) and 28.5 g of polyglycerol-10 (sold under the brand name Polyglycerin-10) are introduced into a jacketed glass reactor, in which jacket circulates a heat-transfer fluid, and equipped with an efficient mechanical stirrer, at a temperature of 35 C. with anchor-type mechanical stirring at a speed of 80 rpm.

After stirring under such conditions for 30 minutes, the mixture is emptied out to obtain composition (EM.sub.3).
I.sub.DPreparation of Composition (EM.sub.4) Based on Decaglyceryl Laurate (EM.sub.1), Glyceryl Polyglucoside and Glycerol (E.sub.IB)

[0163] 71.5 g of decaglyceryl monolaurate sold under the brand name Decaglyn 1-L (referred to hereinbelow as Composition (EM.sub.1)) and 28.5 g of composition (E.sub.IB), the preparation of which is described above, are introduced into a jacketed glass reactor, in which jacket circulates a heat-transfer fluid, and equipped with an efficient mechanical stirrer, at a temperature of 35 C. with anchor-type mechanical stirring at a speed of 80 rpm. After stirring under such conditions for 30 minutes, the mixture is emptied out to obtain composition (EM.sub.4).

I.sub.EPreparation of Composition (EM.sub.5) Based on Decaglyceryl Laurate (EM.sub.1) and Glycerol

[0164] 71.5 g of decaglyceryl monolaurate sold under the brand name Decaglyn 1-L (referred to hereinbelow as Composition (EM.sub.1)) and 28.5 g of glycerol are introduced into a jacketed glass reactor, in which jacket circulates a heat-transfer fluid, and equipped with an efficient mechanical stirrer, at a temperature of 35 C. with anchor-type mechanical stirring at a speed of 80 rpm. After stirring under such conditions for 30 minutes, the mixture is emptied out to obtain composition (EM.sub.5).

[0165] The analytical characteristics of compositions (EM.sub.1), (EM.sub.2), (EM.sub.3), (EM.sub.4), (EM.sub.5) and (EM.sub.6) are collated in table 1 below.

TABLE-US-00001 TABLE 1 Emulsifying composition (EM.sub.1) (EM.sub.2) (EM.sub.3) (EM.sub.4) (EM.sub.5) Proportions of constituents (mass %) Decaglyceryl monolaurate 100% 71.5% 71.5% 71.5% 71.5% Mass proportion of 0% 28.5 0% 0% 0% hexaglycerol Mass proportion of 0% 0% 28.5 0% 0% decaglycerol Mass proportion of glyceryl 0% 0% 0% 12.8% 0% polyglucoside Mass proportion of glycerol 0% 0% 0% 15.7% 28.5
IIPreparation and Evaluation of Self-Invertible Inverse Latices of a Crosslinked Copolymer of the Sodium Salt of 2-methyl-[(1-oxo-2-propenyl)amino]-1-propanesulfonic Acid and of Partially Salified Acrylic Acid

[0166] An aqueous phase is prepared by successively pouring into a beaker, with stirring, 75.4 g of glacial acrylic acid, 577.5 g of an aqueous solution containing 55% of the sodium salt of 2-methyl[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid, 42.5 g of an aqueous solution containing 48% by mass of sodium hydroxide, 0.45 g of a commercial aqueous solution containing 40% by mass of sodium diethylenetriaminepentaacetate and 0.167 g of methylenebis(acrylamide). The pH of this aqueous phase is then adjusted to 5.5.

[0167] Independently, an organic phase is prepared by mixing 208 g of the alkane mixture sold under the brand name Emogreen L15, 14 g of Montane 80, 9.5 g of Montane 70 and 0.2 g of azobis(isobutyronitrile) (AIBN).

[0168] The aqueous phase prepared is then gradually added to the oily phase and then dispersed using an Ultra-Turrax rotor-stator sold by the company IKA.

[0169] The emulsion obtained is transferred into a reactor, subjected to sparging with nitrogen to remove the oxygen, and cooled to about 5-6 C. 5 cm.sup.3 of a solution containing 0.42% by mass of cumene hydroperoxide in EmogreenL15 are added to the emulsion with continuous stirring, followed by gradual introduction of an aqueous solution containing 0.1% by mass of sodium metabisulfite at a flow rate of 0.5 cm.sup.3 per minute to initiate the polymerization reaction. The temperature of the medium increases up to a steady stage. The reaction medium is then heated at 85 C. for 1 hour and the assembly is then cooled to about 35 C. to obtain the noted mixture (M.sub.2).

[0170] The mixture (M.sub.2) obtained previously is split into various portions, to which are added the various surfactant compositions (EM.sub.1), (EM.sub.2), (EM.sub.3), (EM.sub.4) and (EM.sub.5), as described above, heated beforehand to 60 C., in mass proportions as indicated in table 2 below.

[0171] The self-invertible inverse latices resulting from these mixtures are respectively noted (IL.sub.1), (IL.sub.2), (IL.sub.3), (IL.sub.4) and (IL.sub.5), and are evaluated by observation of their appearance at 25 C., by the rate of inversion during the preparation of an aqueous gel containing 2% by mass of self-invertible inverse latex, and by the viscosity of this aqueous gel containing 2% by mass of a self-invertible inverse latex.

[0172] The method for evaluating the inversion time of the self-invertible inverse latices consists in pouring into a 2 liter beaker the required amount of water for the preparation of 800 g of an aqueous gel. A 2004 model Turbotest mechanical stirrer impeller sold by the company VMI, connected to a motor, is placed at the bottom of the beaker. Stirring is started at a speed of 900 rpm and the required amount of self-invertible inverse latex to be evaluated is introduced into the beaker with stirring. The stirrer creates a vortex which disappears when the polymer becomes inverted and the gel forms. The inversion time, measured in seconds, of the self-invertible inverse latices corresponds to the time elapsed between the start of addition of the test self-invertible inverse latex and the disappearance of the vortex, leading to the production of a smooth gel, free of lumps. This evaluation is performed on conclusion of the manufacture of the test inverse latices (t=0) and then after a period of storage of 3 months at 25 C. (t=3 months). The results obtained are given in table 2 below. The viscosity of an aqueous gel containing 2% by mass of self-invertible inverse latex () is measured at t=0 and then at t=3 months, using a Brookfield RVT viscometer (spindle 6, speed 5). Similarly, the appearance of the self-invertible inverse latex is evaluated visually at t=0.

TABLE-US-00002 TABLE 2 Self-invertible inverse latices (IL.sub.1) (IL.sub.2) (IL.sub.3) (IL.sub.4) (IL.sub.5) Reference of the test surfactant composition (EM.sub.1) (EM.sub.2) (EM.sub.3) (EM.sub.4) (EM.sub.5) Amount tested 5% 7% 7% 7% 7% (EMi)/(ILi) (mass %) Measured at t = 0 (in mPa .Math. s) 120 000 116 000 104 000 98 000 104 000 Inversion time 130 s 38 s 38 s 60 s 16 s Appearance of the self- Mle* Mle* Mle* Mle* Mle* invertible latex at 25 C. Measured at T = 3 months (3M) (in mPa .Math. s) 97 000 98 000 100 000 94 000 95 000 Inversion time 151 s 55 s 78 s 78 s 17 s Mle*: Milky liquid emulsion

[0173] The self-invertible inverse latices (IL.sub.2), (IL.sub.3), (IL.sub.4) and (IL.sub.5) according to the invention, and free of alkoxylated and more particularly ethoxylated derivatives, make it possible to obtain smooth gels, with an inversion time that is considerably shorter than that observed for the self-invertible inverse latex (IL.sub.1) comprising only decaglyceryl monolaurate as constituent of the inverting surfactant system, while at the same time maintaining excellent thickening properties. Furthermore, they are characterized by better reproducibility of the rate of inversion and of the thickening properties after three months of storage than for the comparative self-invertible inverse latex (IL.sub.1).

IIIPreparation and Evaluation of Self-Invertible Inverse Latices of a Crosslinked Copolymer of the Sodium Salt of 2-methyl-[(1-oxo-2-propenyl)amino]-1-propanesulfonic Acid and of Partially Salified Acrylic Acid

[0174] Example II, described above, is repeated, replacing the 208 g of Emogreen L15 with 208 g of isohexadecane, to obtain the noted mixture (M.sub.3), which is split into various portions to which are added the various surfactant compositions (EM.sub.1), (EM.sub.2) and (EM.sub.3) as described above, heated beforehand to 60 C., in mass proportions as indicated in table 3 below. The self-invertible inverse latices resulting from these mixtures are respectively noted (IL.sub.6), (IL.sub.7) and (IL.sub.8), and are evaluated by observation of their appearance at 25 C., by the rate of inversion during the preparation of an aqueous gel containing 2% by mass of self-invertible inverse latex (the method of which is described above), and by the viscosity of this aqueous gel containing 2% by mass of a self-invertible inverse latex (; Brookfield RVT viscometer (spindle 6, speed 5)). This evaluation is performed on conclusion of the manufacture of the test inverse latices (t=0) and then after a period of storage of 3 months at 25 C. (t=3 months).

[0175] The results obtained are given in table 3 below.

TABLE-US-00003 TABLE 3 Self-invertible inverse latices (IL.sub.6) (IL.sub.7) (IL.sub.8) Test surfactant composition (EM.sub.1) (EM.sub.2) (EM.sub.3) Amount tested (EMi)/(ILi) (mass %) 5% 7% 7% Measured at t = 0 (in mPa .Math. s) 108 000 106 000 110 000 Inversion time 125 s 60 s 25 s Appearance of the self-invertible latex at Mle* Mle* Mle* 25 C. Measured at t = 3 months (in mPa .Math. s) 97 000 102 000 105 000 Inversion time 155 s 70 s 72 s Mle*: Milky liquid emulsion

[0176] The self-invertible inverse latices (IL.sub.7) and (IL.sub.8) according to the invention, and free of alkoxylated and more particularly ethoxylated derivatives, make it possible to obtain smooth gels, with an inversion time that is considerably shorter than that observed for the self-invertible inverse latex (IL.sub.6) comprising only decaglyceryl monolaurate as constituent of the inverting surfactant system, while at the same time maintaining excellent thickening properties. Furthermore, they are characterized by better reproducibility of the rate of inversion and of the thickening properties after three months of storage than for the comparative self-invertible inverse latex (IL.sub.1).

IV: Illustrative Detergent Formulations

[0177] In the formulations below, the percentages are expressed as mass percentages per 100% of the mass of the formulation.

IV.SUB.A.Cleaning Composition for Ovens and Cooking Grills

[0178]

TABLE-US-00004 Ingredients Mass content SimulsolOX1309L.sup.(1) 2% SimulsolSL7G.sup.(2) 2% Composition (IL.sub.2) 6% Sodium hydroxide: 25% Water: qs 100% .sup.(1)Simulsol OX1309L: detergent surfactant composition sold by the company SEPPIC, comprising polyethoxylated alcohols resulting from the reaction of 1 molar equivalent of an alcohol sold under the brand name Exxal13 with 9 molar equivalents of ethylene oxide. .sup.(2)SimulsolSL7G: solution of n-heptyl polyglucosides, hydrotropic and solubilizing agent sold by the company SEPPIC

Preparation

[0179] a) A pre-gel is prepared at 20 C. by adding Simulsol OX1309L and then SimulsolSL7G in water. Composition (IL.sub.2) according to the invention is then 10 introduced into the aqueous solution and mixed until a gel of stable viscosity is obtained.
b) Sodium hydroxide is then gradually introduced with mechanical stirring at a temperature of 20 C. until a homogeneous gel is obtained. The gel obtained on conclusion of step b) is of homogeneous and clear appearance, with a 15 viscosity of 10 000 mPa.Math.s (Brookfield LVT at a speed of 6 rpm). After a period of storage of 6 months at 25 C., the gel obtained on conclusion of step b) of this procedure is of homogeneous and clear appearance, with a viscosity of 12 000 mPa.Math.s (Brookfield LVT at a speed of 6 rpm).

Cleaning Process

[0180] The composition prepared above is sprayed at room temperature onto the walls of an oven soiled with food grease and onto cooking grills also soiled with food grease. After 10 minutes, the walls of the oven and of the cooking grills are rinsed with hot water at 60 C. The walls of the oven and the surfaces of the cooking grills thus cleaned no longer have any soiling.

IV.SUB.B.Cleaning Agent for Aluminum Surfaces

[0181]

TABLE-US-00005 Ingredients Mass content SimulsolOX1309L 3% SimulsolSL7G 3% Composition (IL.sub.2) 5% 75% phosphoric acid 40% Hordaphos.sup.(3) MDGB 1% 5% Dipropylene glycol methyl ether 5% Water: qs 100% .sup.(3)Hordaphos MDGB is a composition based on phosphoric esters, used as an anticorrosion agent.

Preparation

[0182] Each ingredient is successively introduced into a mixing tank with moderate mechanical stirring, at room temperature, until a homogeneous, clear composition is obtained. Stirring is maintained for 30 minutes at 20 C. The composition obtained has a measured pH value of less than 1.0 and is clear and homogeneous after storage for a period of one month at 40 C.

Cleaning Process

[0183] The composition prepared in the preceding paragraph is diluted to 3% in water and the solution thus obtained is sprayed onto the aluminum wall to be cleaned. This wall is then rinsed with hot water at 60 C.