Detergent composition comprising an inverse latex combining EDDS as sequestrant and a polyelectrolyte comprising AMPS and acrylamide

Abstract

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 2-methyl-2-[(1 -oxo-2-propenyl)amino]-1-propanesulfonic acid in free acid form or partially or totally salified form; —at least one monomer unit derived from at least one monomer chosen from the elements of the group consisting of acrylamide, N,N-dimethylacrylamide, ethacrylamide, N-isopropylacrylamide, N-tert-butylacrylamide; 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 2-methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid in free acid form or partially or totally salified form; at least one monomer unit derived from at least one monomer selected from the group consisting of acrylamide, N,N-dimethylacrylamide, methacrylamide, N-isopropylacrylamide, and N-tert-butylacrylamide; 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 selected from the group consisting of methylenebis(acrylamide), ethylene glycol dimethacrylate, diethylene glycol diacrylate, ethylene glycol diacrylate, diallylurea, triallylamine, trimethylolpropane triacrylate, diallyloxyacetic acid or a salt thereof, and mixtures thereof.

4. The detergent 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 crosslinked anionic polyelectrolyte of the aqueous phase of the inverse latex comprises per 100 mol %: a proportion between 20% and 90% of the monomer unit derived from 2-methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid in free acid form or partially or totally salified form; a proportion between 10% and 80% of the monomer unit derived from at least one monomer selected from the group consisting of acrylamide, N,N-dimethylacrylamide, methacrylamide, N-isopropylacrylamide, and N-tert-butylacrylamide; and a proportion of greater than 0 mol % and less than or equal to 1 mol % of monomer units derived from at least one polyethylenic crosslinking monomer (AR).

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

7. A 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 (O) and an emulsifying surfactant system (S.sub.1) 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 to provide an inerted emulsion, e) initiating a polymerization reaction by introducing a free-radical initiator into the inerted emulsion, forming a reaction mixture, and f) introducing into the reaction mixture resulting from step e) an emulsifying surfactant system (S.sub.2) of oil-in-water type at a temperature between 30° C. and 60° C.

8. The process according to claim 7, wherein, in step e), the free-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 7.0.

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

12. The process according to claim 7, wherein the reaction mixture 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. A process for cleaning a solid surface, comprising at least one first step a″1) of applying said detergent liquid aqueous composition (F) as defined in claim 1 to the solid surface, followed by at least one second step b″1) of rinsing said solid surface.

15. The detergent composition according to claim 1, wherein the polyethylenic crosslinking monomer (AR) is sodium diallyloxyacetate.

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

17. The process according to claim 9, wherein, in step e), the polymerization coinitiator is azobis(isobutyronitrile).

18. The detergent composition according to claim 2, wherein the polyethylenic crosslinking monomer (AR) is selected from the group consisting of methylenebis(acrylamide), ethylene glycol dimethacrylate, diethylene glycol diacrylate, ethylene glycol diacrylate, diallylurea, triallylamine, trimethylolpropane triacrylate, diallyloxyacetic acid or a salt thereof, and mixtures thereof.

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

20. The detergent composition according to claim 2, wherein the crosslinked anionic polyelectrolyte of the aqueous phase of the inverse latex comprises per 100 mol %: a proportion between 20% and 90% of the monomer unit derived from 2-methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid in free acid form or partially or totally salified form; a proportion between 10% and 80% of the monomer unit derived from at least one monomer selected from the group consisting of acrylamide, N,N-dimethylacrylamide, methacrylamide, N-isopropylacrylamide, and N-tert-butylacrylamide; and a proportion of greater than 0 mol % and less than or equal to 1 mol % of monomer units derived from at least one polyethylenic crosslinking monomer (AR).

Description

DESCRIPTION OF THE PREFERRED EMBODIMENTS

(1) The example that follows illustrates the invention without, however, limiting it.

I—Example

(2) 1.1 Preparation of an inverse latex (LI.sub.1) comprising a crosslinked copolymer of the sodium salt of 2-methyl-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid and of acrylamide containing ethylenediaminedisuccinic acid in trisodium salt form as sequestrant.

(3) The following are charged to a beaker, with stirring: 272 g of a commercial solution containing 55% of sodium salt of 2-methyl-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid, 255 g of a solution containing 50% of acrylamide, 115 g of 2-methyl-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid, 0.115 g of methylenebis(acrylamide), 0.62 g of a commercial solution of ethylenediaminedisuccinic acid in trisodium salt form, 0.14 g of copper sulfate pentahydrate.

(4) The pH of the aqueous phase is adjusted to 6 with a 48% sodium hydroxide solution. The organic phase is prepared at the same time by mixing: 220 grams of isohexadecane, 21 grams of Montane™ 80.sup.(1).

(5) (1): Montane™ 80 is a sorbitan monooleate, emulsifying surfactant of water-in-oil type, sold by the company SEPPIC.

(6) The aqueous phase prepared above is gradually added to the oily phase and then dispersed using a rotor-stator of Ultra Turrax™ type sold by the company IKA™.

(7) The emulsion obtained is then transferred to a jacketed reactor, and subjected to nitrogen bubbling in order to remove the oxygen. A solution containing 0.56% by weight of cumene hydroperoxide in 5 ml of isohexadecane is introduced and the emulsion is kept stirring for 5 minutes of homogenization at room temperature.

(8) The polymerization reaction is initiated by adding 15 ml of an aqueous solution containing 0.2% of sodium metabisulfite. Once the polymerization reaction has finished, the reaction medium is heated at 85° C. for 1 h and then the whole medium is cooled to around 35° C., then 50 g of Montanox™ 80.sup.(2) are added to the preparation.

(9) (2): Montanox™ 80 is a polyoxyethylenated derivative of a sorbitan monooleate, used as surfactant of oil-in-water type, sold by the company SEPPIC.

(10) The product obtained is referenced (LI.sub.1) and the results of its evaluations are given in Table 1.

(11) 1.2 Preparation of an inverse latex (LI.sub.2) comprising a crosslinked copolymer of the sodium salt of 2-methyl-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid and of acrylamide containing sodium diethylenetriaminepentaacetate as sequestrant.

(12) The same protocol as in example 1.1 is used but the 0.62 g of a commercial solution of ethylenediaminedisuccinic acid in trisodium salt form is replaced by 0.45 g of a solution of sodium diethylenetriaminepentaacetate (sold under the brand name Versenex™ 80).

(13) The product is referenced (LI.sub.2).

(14) TABLE-US-00001 TABLE 1 Properties of the copolymers obtained in examples 1.1 and 1.2. Analyses Viscosity of Viscosity of aqueous gel Viscosity of aqueous gel containing 3 latex at 25° C. containing 2 wt % + 0.1% Sequestrant (mPa .Math. s) wt %, mPa .Math. s NaCl, mPa .Math. s (amount in Polymerization (Brookfield RVT, (Brookfield RVT, (Brookfield RVT, Test molar ppm) Inhibition Exothermicity Polymerization Spindle 3 Spindle 6 Spindle 6 no (*) (min) (° C.) time (min) Speed 20) Speed 5) Speed 5) (LI.sub.2) Versenex ™ 1 52.2 12 2500 97 000 9100 80 120 ppm (LI.sub.1) Natriquest ™ 0 52.8 10 3220 90 000 8640 E30 200 ppm

(15) In conclusion, the tests of copolymerization of 2-methyl-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid and of acrylamide show that in the presence of copper cations, the trisodium salt of ethylenediaminedisuccinic acid has a similar efficacy to the sodium diethylenetriaminepentaacetate.

(16) In each of the tests, the polymerization has similar characteristics: inhibition time, polymerization time and exothermicity. The self-invertible inverse latices obtained under these conditions have equivalent thickening properties in water and in the presence of electrolytes.

(17) II: Illustrative Detergent Formulations

(18) In the formulations below, the percentages are expressed as weight percentages per 100% of the weight of the formulation.

(19) TABLE-US-00002 II.sub.A - Cleaning composition for ovens and cooking grills Ingredients Weight content SIMULSOL ™OX1309L.sup.(1) 2% SIMULSOL ™SL7G.sup.(2) 2% Composition (LI.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.

(20) (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.

(21) (2): Simulsol™SL7G: solution of n-heptyl polyglucosides, hydrotropic and solubilizing agent sold by the company SEPPIC.

(22) Preparation

(23) 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.

(24) 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).

(25) Cleaning Process

(26) 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.

(27) TABLE-US-00003 II.sub.B - Cleaner for aluminium surfaces Ingredients Weight content Simulsol ™OX1309L 3% Simulsol ™SL7G 3% Composition (LI.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.

(28) (3): Hordaphos™ MDGB is a composition based on phosphoric esters, used as an anticorrosion agent.

(29) Preparation

(30) 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.

(31) Cleaning Process

(32) 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.

(33) The definitions of the products used in the examples are as follows: 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.

(34) Sepicide™ CI, imidazolidinyl urea, is a preservative sold by the company SEPPIC.

(35) Simulsol™ 165 is self-emulsifying glycerol stearate, sold by the company SEPPIC.

(36) Sepicide™ HB, a mixture of phenoxyethanol, methylparaben, ethylparaben, propylparaben and butylparaben, is a preservative sold by the company SEPPIC.

(37) Parsol™ MCX is octyl para-methoxycinnamate, sold by the company Givaudan.

(38) Lanol™ 37T is glycerol triheptanoate, sold by the company SEPPIC.

(39) Solagum™ L is a carrageenan, sold by the company SEPPIC.

(40) Eusolex™ 4360 is a sunscreen, sold by the company Merck.

(41) Deepaline™ PVB is an acylated wheat protein hydrolysate, sold by the company SEPPIC.

(42) Primol™ 352 is a mineral oil, sold by the company Exxon.

(43) Pecosil™ PS 100 is Dimethicone PEG-7, sold by the company Phoenix.

(44) Montanov™ 68 (INCI name: cetearyl alcohol (and) cetearyl glucoside) is an emulsifier, sold by the company SEPPIC.

(45) Montanov™ L (INCI name: C14-22 alcohols (and) C12-20 alkyl glucoside) is an emulsifier sold by the company SEPPIC.

(46) Montanov™ 202 (INCI name: arachidyl alcohol (and) behenyl alcohol (and) arachidyl glucoside) is an emulsifier, sold by the company SEPPIC.