FR2824069A1 - COMPOSITION CONTAINING AT LEAST ONE CELLULOSE SULFO-ACETATE AND AT LEAST ONE SURFACTANT, PROCESS FOR THE PREPARATION THEREOF AND USES THEREOF - Google Patents

Abstract

The invention concerns a composition containing at least a cellulose sulphoacetate and/or at least one of its derivatives, and at least a surfactant. The invention also concerns the method for preparing said composition, in particular in gel form. The invention further concerns the use of said composition.

Description

COMPOSITION CONTAINING AT LEAST ONE CELLULOSE SULFO-ACETATE AND

  AT LEAST ONE SURFACTANT, ITS PREPARATION PROCESS AND ITS

USES.

  The present invention relates to a composition which contains at least one cellulose sulfo-acetate and / or at least one of its derivatives, and at least one surfactant.

  It also relates to the process for the preparation of said composition.

  It also relates to the use of this composition.

  Many industries incorporate surfactants into their formulations.

  The surfactants are mainly used for their specific properties which make it possible to make dispersions, in particular emulsions or suspensions. In fact surfactants are substances that lower the surface tension of water

  or the medium in which they are dissolved. They can be fat-soluble or water-soluble.

  The rheology of formulations incorporating surfactants is of great interest to manufacturers. Indeed it is important to be able to incorporate surfactants as well in liquids, solids, as gels, according to the fields of applications. The present invention relates in particular to surfactant gels, which are

very useful for industrialists.

  The term “gel” is understood to mean any type of system exhibiting a viscoalastic solid behavior at long times (for example, beyond 100 s in a creep experiment or below 10-2 Hz in harmonic regime). From a rheological point of view, this results in the presence of a plateau of G '(conservative module) and values of G' greater than G "(loss module), these two criteria being obtained at low

  frequency (in practice between 10 and 10-2 Hz).

  The known gelling methods for making surfactant gels notably use phase gelling. In these methods, the surfactants and electrolytes are mixed in previously optimized concentrations which cause a

lamellar structuring.

  However, these methods are limited to lamellar structures and are unsatisfactory. Indeed, many problems arise during the development of these gels, in particular problems of compatibility of the media and problems of

  loss of viscosity of the gels obtained.

  In addition, when a formulation is sought in the form of a gel, incorporating surfactants, the known methods do not make it possible to obtain formulations which are

dissolve quickly in an aqueous medium.

  Another drawback is the limit in the choice of surfactants used in the composition of these gels. In fact, not all surfactants make it possible to obtain

structured phases.

  One of the problems which the invention proposes to solve is in particular to be able to provide gels which dissolve quickly in an aqueous medium. In addition, another problem which the invention proposes to solve is notably to be able to supply gels incorporating large amounts of surfactants, and which

dissolve quickly in an aqueous medium.

  The invention further aims to provide surfactant gels which are

  more particularly thermoreversible and thixotropic gels.

  The term “thermoreversible” means a gel which forms after cooling and after having undergone a heat treatment beyond its melting point, and which has a melting point. This melting temperature is the temperature at

beyond which the gel melts.

  By thixotropy, we mean the property of a gel losing its structure under the effect of a shearing force and, then, recovering all or part of its initial state

after a certain period of rest.

  Another object of the invention is to provide a simple and inexpensive method for the

  preparation of the compositions according to the invention.

  The purpose of the present invention is mainly to respond to all of

  these requirements in one formulation.

  Other advantages and characteristics of the present invention will appear.

  clearly on reading the description and the examples which follow.

  The solution provided by the invention is to introduce the surfactants into an aqueous composition which contains at least one cellulose sulfoacetate and / or

minus one of its derivatives.

  Thus the subject of the present invention is an aqueous composition which contains at least one cellulose sulfo-acetate and / or at least one of its derivatives, and at least one surfactant. The invention also relates to the process for the preparation of said

  composition, in particular in the form of a gel having the desired properties.

  It also relates to the use of this composition in various

industrial fields.

  The present invention will now be described in detail in these objects and other characteristics and with the aid of examples given purely by way of non-limiting illustration in reference to the appended figures in which: - Figure n 1 (1/1 and 2/1) represents the evolution of the apparent viscosity of the sulfo-cellulose acetate (15 g / l) / surfactant / water mixtures as a function of the quantity of surfactant, - Figure n 2 represents the mechanical spectrum of the mixtures cellulose sulfoacetate (15 g / l) / surfactant (0 and 10 times the CMC / water for SDS and C12E8, - Figure n 3 (1/3 and 2/3) represents the evolution of module G '' at 1 rad / s of the sulfo-cellulose acetate mixtures (15 g / l) / surfactant as a function of the amount of surfactant (spectrum a: anionic surfactants SDS and LABS; spectrum b:

non-ionic surfactant C12E8).

  The invention relates firstly to a composition which contains at least one sulfo

  cellulose acetate and / or at least one of its derivatives, and at least one surfactant.

  This composition can be in the form of a gel.

  The first essential constituent of the composition consists of at least one surfactant. By surfactants, we mean all substances that lower blood pressure

  surface of the water or the medium in which they are dissolved.

  The surfactants used according to the invention can be ionic or nonionic, and

  can be used alone or in mixtures.

  Mention may be made, as ionic surfactants, without limitation, of the alkyl esters sulfonates, the alkyl sulfides and their alkoxylated derivatives (in particular ethoxylated (OE) eVou propoxylated (OP)), the alkylamide sulfates and their alkoxylated derivatives (in particular ( OE) eVou (OP)), the salts of saturated or unsaturated fatty acids eVou their alkoxylated derivatives (in particular (OE) eVou (OP)), alkylbenzenesulfonates, primary or secondary alkylsulfonates, alkylglycerol sulfonates, sulfonated polycarboxylic acids, paraffin sulfonates, N-acyl N-alkyltaurates, alkylphosphates, isethionates, alkylsuccinamates, alkylsulfosuccinates, monoesters or diesters of sulfosuccinates, N-acyl sarcosinates, sulfates of alkyl glycosides, such as sophorolipids especially in acid form or

  lactone and derivatives of 1 7-hydroxyoctadecenic acid.

  As examples of ionic surfactants, non-limiting mention may be made of anlonic surfactants such as: At the alkyl esters sulfonates of formula of the R-CH (SO3M) -COOR 'type, where R represents an alkyl radical in Cg-20, preferably C10-C16, R 'a C1-C6 alkyl radical, preferably C1-C3 and M an alkali cation (sodium, potassium, lithium), substituted or unsubstituted ammonium (methyl-, dimethyl- , trimethyl-, tetramethylammonium, dimethylpiperidinium ...) or derived from an alkanolamine (monoethanolamine, diethanolamine, triethanolamine ...). Mention may very particularly be made of methyl ester sulfonates, the radical R of which is C14-C16; In the alkyl sulphates of formula of the ROSO3M type, where R represents a C5-C24, preferably C10-C18 alkyl or hydroxyalkyl radical, M representing a hydrogen atom or a cation of the same definition as above, as well as their alkoxylated derivatives (in particular (OE) eVou (OP)), having on average from 0.5 to 30 units, preferably from 0.5 to 10 OE eVou OP units; To sulfated alkylamides in particular of formula of the type RCONHR'OSO3M o R represents an alkyl radical in C2-C22, preferably in C6-C20, R 'an alkyl radical in C2-C3, M representing a hydrogen atom or a cation with the same definition as above, as well as their alkoxylated derivatives (in particular (OE) eVou (OP)), having on average from 0.5 to 60 OE eVou OP units; To the salts of saturated or unsaturated fatty acids, in particular eVou their alkoxylated derivatives (in particular (OE) eVou (OP)), in Cg-C24, preferably in C1 4-C20, alkylbenzenesulfonates in Cg-C20, primary alkylsulfonates or secondary in C, -C22, alkylglycerol sulfonates, paraffin sulfonates, N-acyl N alkyltaurates, alkylphosphates, isethionates, alkylsuccinamates alkylsulfosuccinates, monoesters or diesters of sulfosuccinates, N-acyl sarcosinates, sulfates d 'alkylglycosides; the cation being an alkali metal (sodium, potassium, lithium), a substituted or unsubstituted ammonium residue (methyl-, dimethyl-, trimethyl-, tetramethylammonium, dimethylpiperidinium) or derived from an alkanolamine (monoethanolamine, diethanolamine, triethanolamine); By way of examples of ionic surfactants, non-limiting mention may be made of cationic surfactants such as: To alkylammonium salts of formula of the type R1 R2R3R4N + X o X is a halogen ion, methylsulfate (CH3SO4- ) or ethylsulfete (C2H5SO4-), R1 and R2 are similar or different and represent an alkyl radical in C, -C20, a benzyl or alkylbenzyl radical in C, -C4, R3 and R4 are similar or different and represent an alkyl radical in C-C20, a C, -C4 benzyl or alkylbenzyl radical or an ethylene oxide condensate eVou of propylene (CH2CH2O) X- (CH2CHCHO) yH, ox and y range from 0 to 30 and are never harmful together, as cethylmethylammonium bromide, alkylammonium halides, alkylpyridinium halides; To be a diester of quaternized triethanolamine; At Nmethylimidazoline tallow methyl sulfate ester; To di-hardened tallowdiethyl ammonium chloride (Arquad 2HT O); Dialkyldimethylammonium chloride; With alkylbenzyldimethylammonium chloride; By way of examples of ionic surfactants, non-limiting mention may be made of amphoteric and zwitterionic surfactants such as: In alkyldimethylbetaines, alkylamidopropyldimethylbetaines, al kyltri methyls u lfobetaines, acid condensation products es g ras and protein hydrolysates. As non-ionic surfactants, non-limiting mention may be made of alkoxylated alkylphenols (in particular (OE) eVou (OP)), aliphatic alcohols more particularly in CB_C22, the products resulting from the condensation of the oxide ethylene or propylene oxide with propylene glycol or ethylene glycol, products resulting from the condensation of ethylene oxide or propylene oxide with ethylene diamine, alkoxylated fatty acids (especially (OE) eVou (OP)), alkoxylated fatty acid amides (especially (OE) eVou (OP)), alkoxylated amines (especially (OE) eVou (OP)), alkoxylated amidoamines (especially (OE) ) eVou (OP)), amine oxides, alkoxylated terpene hydrocarbons (in particular (OE) eVou

  (OP)), alkylpolyglycosides, amphiphilic polymers or oligomers.

  As examples of non-ionic surfactants, non-limiting mention may be made of surfactants such as: Alkoxylated alkylphenols (in particular (OE) eVou (OP)), in which the alkyl substituent is in particular C6-C12 and containing from 5 to 25 oxyalkylene units; by way of example, mention may be made of the TRITON X-45, X-114, X-100 or X-102 sold by Rohm & Haas Cy .; Glucosamide, glucamide, glycerolamide; Aliphatic alcohols, in particular C-C22 and their alkoxylated derivatives (in particular (OE) eVou (OP)), containing from 1 to 25 units (OE) eVou (OP); by way of example, mention may be made of TERGITOL 15-S-9, TERGITOL 24-L-6 NMW sold by Unlon Carbide Corp., NEODOL 45-9, NEODOL 23-65, NEODOL 45-7, NEODOL 45-4 marketed by Shell Chemical Cy., KYRO EOB marketed by The Procter & Gamble Cy .; To products resulting from the condensation of ethylene oxide, the compound resulting from the condensation of propylene oxide with propylene glycol, such as the Pluronic sold by BASF; To the products resulting from the condensation of ethylene oxide, the compound resulting from the condensation of propylene oxide with ethylenediamine, such as the TETRON ICs sold by BASF; To amine oxides such as in particular alkyl oxides, more particularly to C10-C1 dimethylamines, alkoxy oxides C3-C22 ethyl dihydroxy ethylamines; To the alkylpolyglycosides in particular described in US-A-4,565,647;

  To fatty acid amides, more particularly to C-C20.

  As for the non ionic amphiphilic amphiphilic polymers or oligomers entering into the composition according to the invention, they are more particularly chosen, alone or as mixtures, from the polymers, oligomers or copolymers at least miscible in

part in the aqueous composition.

  By amphiphilic polymers or oligomers is meant polymers or

  oligomers having a surface tension in an aqueous medium.

  Amphiphilic polymers or oligomers can have a statistical distribution

or a multi-block distribution.

  By way of example of such amphiphilic polymers or oligomers, mention may in particular be made of polysaccharides having hydrophobic groups, in particular

  alkyl groups. Examples include guars.

  Examples of amphiphilic polymers or oligomers that may also be mentioned are the polyhydroxystearate - polyethylene glycol polyhydroxystearate triblock polymers (the products of the Arlacel range from ICI are an example),

hydrophabited polyacrylamides.

  As regards non-ionic amphiphilic polymers more particularly alkoxylated (in particular (OE) eVou (OP)), the latter are more particularly chosen from polymers of which at least a part (at least 50% by weight) is miscible

in water.

  As examples of polymers of this type, mention may be made, among others, of

  polyethylene glycol / polypropylene glycol / polyethylene glycol triblock polymers.

  The preferred surfactants according to the invention are nonionic surfactants and

anlonic surfactants.

  Mention may be made, as non-ionic surfactants, of fatty alcohols

alkoxylated (OE eVou OP).

  According to a preferred embodiment of the invention, the preferred surfactant is monon-dodecyl

  octactethylene glycol ether, alone or as a mixture.

  Mention may be made, as preferred anlonic surfactants, of

  alkylbenzenesulfonates, in particular Cg-C20.

  Mention may also be made, as preferred anionic surfactants, of sodium

  dodecyl sullate or the sodium salt of dodecylbenzene sulfonic acid.

  In the context of the present invention the concentration of nonionic surfactant in the composition is less than or equal to 150 times the critical micellar concentration of the surfactant, preferably less than or equal to 100 times the micellar concentration

surfactant review.

  As for the concentration of ionic surfactant, it is lower or

  equal to 10 times the critical micelle concentration.

  The term “critical micellar concentration” (CMC) of a compound is understood to mean the concentration of this compound, in the medium, above which the compound micelles are formed in this medium. For concentrations below CM C, the surfactant molecules are free and for concentrations above CM C,

  an aggregation of these surfactant molecules appears to form micelles.

  It should be noted that the critical micellar concentration can be determined by

interfacial tension.

  In the case of ionic surfactants, the critical micellar concentration may

  also be determined by conductimetry.

  The second essential constituent of the composition is constituted by at least one

  cellulose sulfo-acetate and / or at least one of its derivatives.

  By cellulose sullo-acetate derivatives is meant cellulose sulfo-butyrate or cellulose sulfo-butyrate or cellulose sulfoproplonate

  or cellulose sulfo-aceto-propionate.

  These products, which are advantageously water-soluble, are well known

  skilled in the art and are prepared by esterification of a cellulosic compound.

  The concentration of cellulose sulfo-acetate or one of its derivatives can be between 0.01% and 20%, preferably between 0.1% and 5%, more particularly

  between 0.5% and 3% by weight of the composition.

  The second aspect of the present invention relates to the preparation process

of composition.

  This process consists in contacting an aqueous phase, at least one tensio

  active ingredient and cellulose sulfoacetate or one of its derivatives (step (i)).

  Preferably, the preparation process is carried out by introducing, during step (i), into an aqueous phase the cellulose sulfoacetate or one of its

  derivatives then at least one surfactant.

  According to a variant of the invention, in particular for preparing the composition according to the invention in the form of a gel, the preparation process can comprise a heat treatment step after step (i) where the temperature is between 30 ° C. and

   C, advantageously between 60 C and 120 C.

  According to another variant of the process according to the invention, the preparation process is carried out by introducing at least one surfactant into an aqueous phase containing the cellulose sulfoacetate or one of its derivatives having undergone the same

heat treatment.

  The duration of the heat treatment can vary from 1 minute to 6 hours, from

  preferably 15 minutes to 4 hours.

  At the end of the heat treatment, said solution obtained from step (i) can be cooled,

  up to a temperature between 0 C and the ambient temperature (20 C - 25 C).

  The purpose of this step is to structure the gel, when it is desired to obtain a gel.

  Another aspect of the present invention relates to the use of the compositions in the fields of cosmetics, detergency, food, paper,

  agrochemical, pharmaceutical, dye, drilling fluids.

  In these fields, the compositions according to the invention, whatever their

  variants, can be used in formulations as a detergent.

  The invention also extends to detergent formulations comprising

compositions according to the invention.

  The following examples illustrate the invention without, however, limiting its scope.

EXAMPLES

  Example 1: Preparation of cellulose sulfo-acetate or one of its derivatives Avicel cellulose grams are suspended in 200 ml of acetic acid

  and left under magnetic stirring for 30 minutes at room temperature.

  After filtration or centrifugation, the excess liquid is removed and the same operation

is repeated twice.

  The final filter cake is then immersed in 192 ml of acetic acid containing 1.32 ml of sulfuric acid. The whole is then stirred at room temperature for 1 minute, after which 19.1 ml of acetic anhydride are added. After stirring for 1 minute, the medium is heated to 40 ° C. for 30 minutes. The reaction is stopped by adding 46 ml of a water / acetic acid mixture (15/30). Then, the medium is partially neutralized, at room temperature, by adding sodium hydroxide. The

  polymer is isolated by precipitation or dialysis then lyophilization.

  The product obtained is analyzed by gel permeation chromatography in the eluting solvent Dimethyl acetate / LiCI (DMAc / LiCI). The molar mass by weight measured is 80,000. The content of acetate function is obtained by prior saponification of the acetate functions, the degree of substitution for acetate function calculated is then equal to 2.5. The content of sulfate functions is estimated by the method described by Quemener et al. (Appl. Phycology, 9, p 179-188 1997). The degree of substitution as a sulfete function is equal to 0.3 Example 2: Preparation of a composition of cellulose sulto-acetate and of surfactant and appearance of the mixtures grams of cellulose sulfo-acetate are introduced into 1 liter of distilled water. The mixture is dispersed with stirring for 1 hour at 80 ° C. and then left for 1 hour at room temperature. Then, the quantity of surfactants is introduced and the mixture is again stirred for 30 minutes then left to stand for 24 hours before the measurement. Different experiments have been carried out with sodium dodecyl sulfate (SDS), the sodium salt of dodecylbenzene sulfonic acid (LABS) and mono-n-dodecyl ether

octaethylene glycol (C12E8).

  With SDS and LABS, a gel is obtained at 25 ° C. at a concentration of 10 × the critical micellar concentration of the surfactant. For C12E8, a gel is obtained at 25 ° C. at a concentration of 100 × the critical micellar concentration of the surfactant Example 3: Rheological properties of the gels The measurements are carried out using a rheometer (Rheometrics Fluid Spectrometer II. Piscataway, USA) and a "flat cone" measurement system. The sample undergoes a stress between the plane perpendicular to the axis of the cone, rotating at a certain speed Q and the fixed cone of radius 25 mm. During the deformation imposed, the shear stress in any point of the air gap is given by = 3c / 3nr3 and the speed of

  shear by = Q / oc (with c = 0.0397 rad).

  The flow curves are established over a range of shear speed going

from 100 to 0.025 s'.

  Figure 1 (1/1 and 2/1) shows the evolution of the apparent viscosity of the sulfo-cellulose acetate (15 gil) / surfactant / water mixtures as a function of the amount of surfactant. The flow curves all exhibit marked shear thinning behavior and a Newtonian plateau at low shear rates. The apparent viscosity increases first with the concentration of surfactants up to an optimal concentration which depends on the nature of the surfactant. The viscosity then decreases but always remains greater than or equal to the apparent viscosity of the control gel

containing no surfactant.

  The viscoelastic behavior of the mixtures has been studied. Figure 2 shows the mechanical spectrum of the sulfo-cellulose acetate (15 g / l) / surfactant (0 and 10

  times the CMC / water for SDS and C12E8.

  Thus, in the absence of surfactant, the modules G 'and G "increase with frequency and G' is greater than G" which indicates that the system is structured (gel). In the presence of the surfactant SDS, G 'and G "are independent of the frequency up to a frequency of 0.1 rad / s then the modules increase with the frequency. For the two types of surfactants, G' is greater than G ". With the C12E8, the modules increase with the

  frequency from 0.01 to 100 rad / s. Again, G 'is greater than G ".

  These results indicate that the gel structure is preserved in the presence of surfactant.

whatever their nature.

  The evolution of the module G 'at 1 rad / s for the surfactants SDS, LABS and C12E8 is given in FIG. 3 (1/3 and 2/3). In addition, the tan at 0.01 rad / s is reported in table 2. These data indicate the more or less pronounced elastic nature of these gels and confirm that the mechanical properties of these gels are preserved, even

  improved, compared to gels without surfactant.

  Figure 3 (1/3 and 2/3) shows the evolution of the G 'module at 1 rad / s of the sulfo-cellulose acetate (15 g / l) / surfactant mixtures as a function of the amount of tensio active (spectrum a: SDS and LABS anlonic surfactants; spectrum b: nonionic surfactant

C12E8)

  Concentration 0 0.5 1 5 10 50 100 (nxCMC)

SDS 0.40 0.33 0 24 0.31 0.30

LABS 0.40 0.55 0.37 0.27 0.23

  C12E8 0.40 0.45 0.28 0.28 0.23 0.27 0.32

  Table 2: Evolution of tan at 0.01 rad / s of cellulose sulfo-acetate gels (15

  g / l), surfactant (nxCMC), water at 25 C.

Claims (18)

  1. Aqueous composition characterized in that it contains at least one cellulose acetate sulfo and / or at least one of its derivatives, and at least one surfactant. 2. Composition according to claim 1 characterized in that it is in the form of a gel.   3. Composition according to any one of claims 1 or 2 characterized in that   that the surfactant is chosen from ionic, nonionic surfactants, alone or in mixture.   4. Composition according to claim 3 characterized in that the surfactant is 1 5 ionic.   5. Composition according to any one of claims 3 or 4 characterized in that   that the ionic surfactant is chosen from alkyl esters sulfonates, alkyl sulfates and their alkoxylated derivatives (in particular ethoxylated (OE) eVou propoxylés (OP)), alkylamides sulfates as well as their alkoxylated derivatives (in particular (OE) eVou (OP) ), the salts of saturated or unsaturated fatty acids eVou their alkoxylated derivatives (in particular (OE) eVou (OP)), alkylbenzenesulfonates, primary or secondary alkylsulfonates, alkylglycerol sulfonates, sulfonated polycarboxylic acids, paraffin sulfonates, N-acyl N alkyltaurates, alkylphosphates, isethionates, alkylsuccinamates, alkylsulfosuccinates, monoesters or diesters of sulfosuccinates, N-acyl   sarcosinates, alkyl glycoside sulfates, sophorolipids.   6. Composition according to claim 3 characterized in that the surfactant is non-ionic.   7. Composition according to any one of claims 3 or 6 characterized in that   that the nonionic surfactant is chosen from alkoxylated alkylphenols   (in particular (OE) eVou (OP)), aliphatic alcohols more particularly in C-   C22, the products resulting from the condensation of ethylene oxide or propylene oxide with propylene glycol or ethylene glycol, the products resulting from the condensation of ethylene oxide or oxide of propylene with ethylene diamine, alkoxylated fatty acids (especially (OE) eVou (OP)), alkoxylated fatty acid amides (especially (OE) eVou (OP)), alkoxylated amines (especially (OE) eVou (OP)), alkoxylated amidoamines (in particular (OE) eVou (OP)), amine oxides, alkoxylated terpene hydrocarbons (in particular (OE) eVou (OP)), alkylpolyglycosides, amphiphilic polymers or oligomers.   8. Composition according to any one of claims 3 or 6 or 7 characterized   in that the surfactant is mono-n-dodecyl ether octactethylene glycol.   9. Composition according to any one of claims 1 to 3 and 6 to 8 characterized   in that the concentration of nonionic surfactant is less than or equal to 150 times the critical micellar concentration of the surfactant, preferably less than or   equal to 100 times the critical micellar concentration of the surfactant.   10. Composition according to any one of claims 1 to 5 characterized in that   the ionic surfactant concentration is less than or equal to 10 times the   critical micellar concentration of the surfactant.   11. Composition according to any one of claims 1 to 10 characterized in that   the concentration of cellulose sulfoacetate or one of its derivatives is between 0.01% and 20%, preferably between 0.1% and 5%, more particularly   between 0.5% and 3% by weight of the composition.   12. Process for preparing the composition according to any one of   Claims 1 to 11, characterized in that this process consists in   contact an aqueous phase, at least one surfactant and the sulfo-acetate   cellulose or one of its derivatives (step (i)).   13. Preparation process according to claim 12 characterized in that at least one surfactant is introduced during step (i) into an aqueous phase   then cellulose sulfo-acetate or one of its derivatives.   14. Method according to one of claims 12 or 13 characterized in that one   performs a heat treatment at a temperature between 30 C and   140 C, advantageously between 60 C and 120 C, after step (i).   15. The method of claim 14 characterized in that the heat treatment is carried out for a period of 1 minute to 6 hours, preferably of minutes to 4 hours.   16. Method according to any one of claims 12 to 15 characterized in that   that said solution from step (i) is cooled to a temperature   between 0 C and the ambient temperature.   17. Use of the composition according to any one of claims 1 to 11   in formulations intended for the cosmetics, detergency, food, paper, agrochemical, pharmaceutical,   dye, drilling fluids.   18. Detergent formulation comprising the composition according to one of claims