DETERGENT COMPOSITION COMPRISING AN INVERSE LATEX COMBINING A PARTICULAR SEQUESTRANT AND A POLYELECTROLYTE COMPRISING A STRONG ACID FUNCTION AND A NEUTRAL FUNCTION

Abstract

Disclosed is a detergent composition (F) for domestic or industrial use including, as thickener, a self-invertible inverse latex including an aqueous phase including: a) a crosslinked anionic polyelectrolyte (P) consisting of: —at least one monomer unit 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 the monomers being in free acid, partially salified or totally salified form; and—at least one monomer unit derived from a polyethylenic crosslinking monomer (AR), b) ethylenediaminedisuccinic acid in trisodium salt form.

Claims

1. Detergent composition (F) suitable for domestic or industrial use comprising, as thickener, a self-invertible inverse latex comprising an aqueous phase comprising: a) a crosslinked anionic polyelectrolyte (P) consisting of: at least one monomer unit 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 salified or totally salified form; and at least one monomer unit derived from a polyethylenic crosslinking monomer (AR), b) ethylenediaminedisuccinic acid in trisodium salt form.

2. The detergent composition according to claim 1, wherein the aqueous phase of the inverse latex comprises at least 0.01 mol % of ethylenediaminedisuccinic acid in trisodium salt form.

3. The detergent composition according to claim 1, wherein the polyethylenic crosslinking monomer (AR) is chosen from methylenebis(acrylamide), ethylene glycol dimethacrylate, diethylene glycol diacrylate, ethylene glycol diacrylate, diallylurea, triallylamine, trimethylolpropane triacrylate, diallyloxyacetic acid or a salt thereof, or a mixture of these compounds.

4. The detergent composition according to claim 1, wherein the crosslinking monomer (AR) is methylenebis(acrylamide) or triallylamine.

5. The detergent composition according to claim 1, wherein the self-invertible inverse latex comprises between 10% and 90% by weight of the crosslinked anionic polyelectrolyte (P).

6. The detergent composition according to claim 1, comprising between 0.1% and 10% by weight of said inverse latex.

7. Process for preparing a detergent composition as defined in claim 1, comprising a step of preparing the inverse latex comprising the following sub-steps: a) preparing the aqueous phase, b) preparing an organic phase comprising at least one oil and an emulsifying system of water-in-oil type, c) mixing the aqueous phase and the organic phase prepared in steps a) and b) and emulsifying so as to form an emulsion, d) inerting the emulsion with nitrogen, e) initiating the polymerization reaction by introducing a free-radical initiator into the inerted emulsion, and f) introducing into the reaction medium resulting from step e) an emulsifying system of oil-in-water type at a temperature between 30° C. and 50° C.

8. The process according to claim 7, wherein, in step e), the radical initiator is a redox pair which generates hydrogen sulfite (HSO.sub.3.sup.−) ions.

9. The process according to claim 7, wherein, in step e), a polymerization coinitiator is introduced into the inerted emulsion.

10. The process according to claim 7, wherein, in step a), the pH of the aqueous phase is adjusted between 3.0 and 6.5.

11. The process according to claim 7, characterized in that the reaction medium derived from step e) is concentrated by distillation before carrying out step f).

12. The process according to claim 7, wherein the reaction medium derived from step e) or f) is spray-dried.

13. A thickener and/or emulsifier and/or stabilizer for a detergent liquid aqueous composition for domestic or industrial use comprising the inverse latex of claim 1.

14. (canceled)

15. Process for cleaning a solid surface, comprising at least one first step of applying said detergent composition (F) as defined in claim 1, followed by at least one second step of rinsing said solid surface.

16. The detergent composition of claim 1, wherein the polyethylenic crosslinking monomer (AR) is sodium diallyloxyacetate.

17. The process according to claim 8, wherein, in step e), the redox pair is the cumene hydroperoxide/sodium metabisulfite (Na.sub.2S.sub.2O.sub.5) pair or the cumene hydroperoxide/thionyl chloride (SOCl.sub.2) pair.

18. The process according to claim 9, wherein the polymerization coinitiator is azobis(isobutyronitrile).

19. The detergent composition according to claim 2, wherein the polyethylenic crosslinking monomer (AR) is chosen from methylenebis(acrylamide), ethylene glycol dimethacrylate, diethylene glycol diacrylate, ethylene glycol diacrylate, diallylurea, triallylamine, trimethylolpropane triacrylate, diallyloxyacetic acid or a salt thereof, or a mixture of these compounds.

20. The detergent composition according to claim 2, wherein the crosslinking monomer (AR) is methylenebis(acrylamide) or triallylamine.

21. The detergent composition according to claim 3, wherein the crosslinking monomer (AR) is methylenebis(acrylamide) or triallylamine.

Description

DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0124] The examples that follow illustrate the invention without, however, limiting it.

Examples

1.1 Preparation of an Inverse Latex (LI.SUB.1.) Comprising a Crosslinked Homopolymer of the Ammonium Salt of Acrylic Acid Containing Ethylenediaminedisuccinic Acid in Trisodium Salt Form as Sequestrant.

[0125] The following are charged to a beaker, with stirring: [0126] 250 grams of deionized water, [0127] 250 grams of glacial acrylic acid, [0128] 125 grams of an aqueous 30 wt % solution of ammonia, [0129] 0.62 gram of a commercial 35 wt % solution of ethylenediaminedisuccinic acid in trisodium salt form (sold under the brand name Natriquest™ E30), [0130] 0.139 gram of copper sulfate pentahydrate (i.e. an amount of 160 molar ppm relative to the sum of the number of moles of acrylic acid), [0131] 0.71 gram of triallylamine.

[0132] The pH of the aqueous phase is adjusted to 5.5 and the solution is made up with deionized water to 682 grams.

[0133] The organic phase is prepared at the same time: [0134] 250 grams of isohexadecane, [0135] 15 grams of Montane™ 80 VG, [0136] 10 grams of Hypermer™ 6212.sup.(1).
(1): Hypermer™ 6212 is a Surfactant of Oil-in-Water Type Derived from PolylsoButylene Succinic Anhydride

[0137] The aqueous phase is gradually introduced into the organic phase and is then subjected to vigorous mechanical stirring with an Ultra-Turrax machine sold by IKA™. The emulsion obtained is then transferred to a polymerization reactor. The emulsion is subjected to significant nitrogen bubbling so as to remove the oxygen for 45 minutes and the medium is cooled to a temperature of around 5-6° C.

[0138] 0.11 g of AIBN and a solution of cumene hydroperoxide (0.08 g in 5 ml of isohexadecane) are then introduced.

[0139] After a sufficient time for good homogenization of the solution, an aqueous solution of sodium metabisulfite (0.1 g in 25 ml of water) is then introduced at a rate of 0.5 ml/minute. During this introduction, the temperature in the polymerization reactor is allowed to increase to the final polymerization temperature. The reaction medium is then maintained at this temperature for about 90 minutes. The whole medium is cooled to a temperature of around 35° C. 37.5 g of Montanox 80 are added to the emulsion, as well as 12.5 g of Simulsol OL50.

[0140] The product obtained is referenced (LI.sub.1).

1.2 Preparation of an Inverse Latex (LI.SUB.2.) Comprising a Crosslinked Homopolymer of the Ammonium Salt of Acrylic Acid Containing Sodium Diethylenetriaminepentaacetate as Sequestrant.

[0141] The same protocol as in example D.3.4 except that the 0.62 gram of solution of ethylenediaminedisuccinic acid in trisodium salt form are substituted with 0.45 gram of a commercial solution containing 40% by weight of sodium diethylenetriaminepentaacetate (sold under the brand name Versenex™80).

[0142] The product obtained is referenced (L.sub.2).

1.3 Preparation of an Inverse Latex (LI.SUB.3.) Comprising a Crosslinked Homopolymer of the Ammonium Salt of Acrylic Acid Containing Glutamic Acid, N,N-Diacetic Acid, Tetrasodium Salt as Sequestrant.

[0143] The same protocol as in example 1.1 except that the 1.24 grams of solution of ethylenediaminedisuccinic acid in trisodium salt form are substituted with 0.62 gram of a commercial solution containing 47% by weight of the glutamic acid, N,N-diacetic acid, tetrasodium salt (sold under the brand name Dissolvine™GDA 47-S).

[0144] The product is referenced (LI.sub.3).

[0145] This test was not analysed since the reaction was not complete, in view of the low exothermicity recorded.

TABLE-US-00001 TABLE 1 Characterizations Viscosity Viscosity of Viscosity of of latex at aqueous gel aqueous gel Polymerization 25° C., containing 2 wt %, containing 3 wt % + Polymerization mPa .Math. s mPa .Math. s 0.1% NaCl, mPa .Math. s Test Chelating Inhibition Exothermicity time (Brookfield RVT, (Brookfield RVT, (Brookfield RVT, no. agent (min) (° C.) (min) Spindle 3 Speed 20) Spindle 6 Speed 5) Spindle 6 Speed 5) (Ll.sub.2) Versenex ™ 0 51.7 18 1250 102 600 14060 80 (103 ppm) (Ll.sub.1) Natriquest ™ 0 47.1 23 620  61 400 11 100  E30 (177 ppm) (Ll.sub.3) Dissolvine ™ 0 17 24 nr nr nr GLDA 47-S (478 ppm)

[0146] Properties of the self-invertible inverse latexes obtained in examples 1.1, 1.2, 1.3.

[0147] (*): The amount of sequestrant is expressed in molar ppm and calculated relative to the number of moles of acrylic acid).

[0148] Test (LI.sub.3) demonstrates the lower efficacy of the glutamic acid, N,N-diacetic acid, tetrasodium salt (sold under the brand name Dissolvine™GLDA 47-S) despite its higher chelating capacity (29.92 grams of Cu/gram of sequestrant [1]) than that of ethylenediaminedisuccinic acid in trisodium salt form (6.59 grams of Cu/grams of sequestrant [2]). Specifically, added before the polymerization under greater stoichiometric conditions, glutamic acid, N,N-diacetic acid, tetrasodium salt enables the initiation of the polymerization reaction but an increase in exothermicity of only 17° C., which suggests that the conversion of the monomers is not complete. The process has not therefore taken place in a similar manner to the process of tests (LI.sub.1) and (LI.sub.2), and the self-invertible inverse latex obtained does not allow gels in solution containing 2% and containing 3% to be obtained.

[0149] On the contrary, test (LI.sub.1) using ethylenediaminedisuccinic acid in trisodium salt form as sequestrant makes it possible to obtain a self-invertible inverse latex which has thickening properties similar to those of the self-invertible inverse latex (LI.sub.2).

[0150] Ethylenediaminedisuccinic acid in trisodium salt form may therefore be considered as an alternative to sodium diethylenetriaminepentaacetate for preparing thickening self-invertible inverse latices comprising a homopolymer of salified acrylic acid.

II: Illustrative Detergent Formulations

[0151] In the formulations below, the percentages are expressed as weight percentages per 100% of the weight of the formulation.

II.SUB.A.—Cleaning Composition for Ovens and Cooking Grills

[0152]

TABLE-US-00002 Ingredients Weight content SIMULSOL ™OX1309L.sup.(1) 2% SIMULSOL ™SL7G.sup.(2) 2% Composition (Ll.sub.6) 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 Exxal ™13 with 9 molar equivalents of ethylene oxide. .sup.(2)Simulsol ™SL7G: solution of n-heptyl polyglucosides, hydrotropic and solubilizing agent sold by the company SEPPIC.

Preparation

[0153] a) A pre-gel is prepared at 20° C. by adding Simulsol™ OX1309L and then Simulsol™SL7G in water. Composition (LI.sub.6) according to the invention is then introduced into the aqueous solution and mixed until a gel of stable viscosity is obtained.

[0154] 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 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 has a homogeneous and clear appearance, with a viscosity of 12 000 mPa.Math.s (Brookfield LVT at a speed of 6 rpm).

Cleaning Process

[0155] 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 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.

II.SUB.B.—Cleaner for Aluminium Surfaces

[0156]

TABLE-US-00003 Ingredients Weight content Simulsol ™OX1309L 3% Simulsol ™SL7G 3% Composition (Ll.sub.6) 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

[0157] 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

[0158] The composition prepared in the preceding paragraph is diluted to 3% in water and the solution thus obtained is sprayed onto the aluminium wall to be cleaned. This wall is then rinsed with hot water at 60° C.

[0159] The definitions of the products used in the examples are as follows: [0160] Micropearl™ M 100 is an ultrafine powder which is very soft to the touch and which has a mattifying action, sold by the company Matsumo. [0161] Sepicide™ CI, imidazolidinyl urea, is a preservative sold by the company SEPPIC. [0162] Simulsol™ 165 is self-emulsifying glycerol stearate, sold by the company SEPPIC. [0163] Sepicide™ HB, a mixture of phenoxyethanol, methylparaben, ethylparaben, propylparaben and butylparaben, is a preservative sold by the company SEPPIC. [0164] Parsol™ MCX is octyl para-methoxycinnamate, sold by the company Givaudan. [0165] Lanol™ 37T is glycerol triheptanoate, sold by the company SEPPIC. [0166] Solagum™ L is a carrageenan, sold by the company SEPPIC. [0167] Eusolex™ 4360 is a sunscreen, sold by the company Merck. [0168] Deepaline™ PVB is an acylated wheat protein hydrolysate, sold by the company SEPPIC. [0169] Primol™ 352 is a mineral oil, sold by the company Exxon. [0170] Pecosil™ PS 100 is Dimethicone PEG-7, sold by the company Phoenix. [0171] Montanov™ 68 (INCI name: cetearyl alcohol (and) cetearyl glucoside) is an emulsifier, sold by the company SEPPIC. [0172] Montanov™ L (INCI name: C14-22 alcohols (and) C12-20 alkyl glucoside) is an emulsifier sold by the company SEPPIC. [0173] Montanov™ 202 (INCI name: arachidyl alcohol (and) behenyl alcohol (and) arachidyl glucoside) is an emulsifier, sold by the company SEPPIC.