FR2511030A1 - LIQUID DETERGENT COMPOSITION AND PROCESS FOR PREPARING THE SAME - Google Patents

Abstract

THE INVENTION CONCERNS A LIQUID DETERGENT FOR SMALL WASHES CONTAINING ABOUT 0.1 TO 0.6 OF A NON-IONIC HYDROXYPROPYL DERIVATIVE OF GUAR GUM, AS AN AGENT PROMOTING FOAMING IN AN AQUEOUS SOLUTION CONTAINING A MAXIMUM OF 40%. PREFERENCE LESS THAN 35 OF A TERNARY SURFACTANT SYSTEM INCLUDING ONE (ALKYL CAC) ETHENOXY-ETHER-SULPHATE, ONE (ALKYL CAC) ALKYL-SULPHATE AND A BETAINE.

Description

I

  The present invention relates to new compounds.

  Liquid detergent solutions for small washes with better foaming properties, containing small amounts of a nonionic hydroxypropyl derivative of guar gum as a foam stabilizing agent. More particularly, this detergent system contains a ternary mixture of an alkyl- ethenoxy ether sulfate, of an alkyl

sulfate and betaine.

  The foam boosters commonly used Io for conventional liquid detergents for small washes

  are either amides or amine oxides

  to reinforce the foam, we used them

  relatively high rates (3 to 6%).

  The prior art abounds in liquid detergent compositions I 5 for small washes, containing mixtures of bftanes and one or more detergents

  anior ics as indicated in the United States patent of an A-

  risk N 3 849 548 which describes a shampoo composition

  with several detergents containing betaine and lauryl-

  sulfate or a lauryl ether sulfate (Example 3 and Table III); US Pat. No. 3,950,417 which describes a composition containing several intense foaming detergents, comprising a betalne and an anionic surfactant such as an alkyl ether sulphate or an alkyl sulphate and a nonionic surfactant, for example the monolaurate of

  polyoxyethylene-scrbitan; the patent of the United States of America

  risk N 3 996 I 46 which describes a shampoo formulation

  acid containing a cationic resin, at least two deter-

  anionic gents, one of which is an alkyl ether sulfate, and a betaine; U.S. Patent 4,009,256

  which also describes a composition of shampoo containing

  nant a cationic polymer, a b 6 talne, and an alkyl ether-

  sulfate (Example VI); the patent of the United States of America

  N 4 I 48 762 which describes a detergent composition containing

  giving a betaine and from 5 to 30% of anionic surfactants such as an alkyl sulfate, an alkyl ether sulfate and an alkyl aryl ether sulfate; and the United States patent

  America N 4 I 66 845 which describes an anti-dandruff shampoo

  ring with strong foaming power containing a betadne and

  another detergent which can be an alkyl sulfate.

  wise of the above compositions results from the use of conventional foam boosters, or the combination

particular of detergents.

  However, none of the above-mentioned patents describes a liquid detergent composition containing the mixture

  ternary of a beta Ine, an alkyl sulfate and an alkyl-

I O ethenoxy ether sulfate.

  The patent of the United States of America N 4,075 I 3 I describes a treatment shampoo containing an amphoteric surfactant such as betaine, and a zwitterionic polymer, and which can also contain foam enhancers I 5 such as alkanolamide (Example I) The ternary mixture

  an alkyl sulfate, an alkyl ether sulfate and a be-

  tayne is described there (column 7) as a control concentrate for evaluating the effectiveness of the treating shampoo containing

  the treatment agent, i.e. the polymer zwitte-

rionic.

  The prior art also describes the use of hydroxyalkyl ethers of guar gum (a galactomanan gum) as thickeners in pastes

  printing, paint dispersions and suspensions

  explosive ions, as indicated in United States patents

  United States of America NO 3,748 20 I and NO 3,700,612 However, the compositions described do not include compositions

liquid detergents.

  The Jaguar catalog from Stein-Hall and Company Inc, describes hydroxypropylated guar gum derivatives useful as thickening agents Guar gum is chemically listed as a galactomannan; it is a high molecular weight polymer or polysaccharide carbohydrate made up of many mannose and galactose units

  linked together (page 5 of the catalog).

  Japanese patents N 76 20 202 and 20 203 (I 976)

  describe the preparation of sugar or hydroxy glucose

  propylated and their use as an additive for detergents; and the preparation of hydroxyethylated starch or hydroxypropylated amylose and their use as a soil redeposition inhibitor for detergents, said detergent composition containing a sodium salt of a coconut alcohol sulfate; sodium carbonate and sodium sulphate The particular example cited in these patents indicates that with lauryl alcohol sulphate (surfactant), the traditional detergent auxiliary, tripolyphosphate, can be replaced by Hydroxypropyl ether of glucose and the detergent properties of the composition are still preserved.

  particulars mentioned here are the hydroxyal ethers

  kylics (ethyl, propyl and butyl) of I 5 mono and disaccharides However, there is no mention of guar gum or guar gum derivatives or

foam stabilization.

  We have now discovered that the addition-of pe-

  small amounts of a nonionic hydroxypropylated guar gum derivative (O, OI at 1%) to a liquid detergent for delicate washing containing a ternary mixture of an alkyl-ethenoxy-ether-sulfate, an alkyl-sulfate and of a betalne significantly improved the stability of the foam, the cleaning power and the consistency

liquid detergent.

  Consequently, the invention proposes to provide

  nir new liquid detergent compositions for small washes containing small amounts of a nonionic hydroxypropyl derivative of guar gum as stabilizer

  foam and thickening agent.

  The invention further proposes to provide a new liquid detergent composition containing a reduced amount of active detergent ingredients while providing better foaming properties.

and cleaning.

  The invention also proposes to provide a new liquid detergent having better foaming properties and a viscosity of at least 0.1 Pa s (IOO

  centipoises) containing the ternary mixture of an alkyl-

  ethenoxy ether sulfate, an alkyl sulfate and a betaine.

  Other objects and advantages of the invention emerge.

  will derive from the description which follows.

  To achieve the objects of the invention as well as others, the new liquid detergent composition for small washes according to the present invention contains a

  ternary mixture of the following surfactants: alkyl-ethenoxy-

  I O ether sulfate, alkyl sulfate and beta 5 ne, and about

  0.1 to I% preferably 0.1 to 0.6% of a hydroxy derivative

  non-ionic guar gum propyl.

  Consequently, the present invention relates to a liquid detergent composition for light washing having a good foam stability consisting essentially of 0.01 to I%, preferably from 0.025 to 0.6%, better still from 0.1 0.6% by weight of a hydroxypropyl derivative of

  guar gum, in an aqueous vehicle containing a maximum

  mum of 40%, preferably 35%, of a hydroso- ternary system

  luble of a (C 8 to C 18 alikyl) -ethenoxy-ether-sulfate, of a

  (C 8 to C 8 alkyl) -sulfate and betaine Formu-

  lations containing as little as 22% information

  active ingredients are capable of foaming and cleaning in the presence of small amounts of the hydroxypr 9 pylic derivative of

guar gum.

  The foam enhancer used in the present invention, which also acts as a thickening agent, is

  a nonionic hydroxypropyl derivative of guar gum.

  The above derivative is prepared by hydroxypropylant, the guar molecule, which is a straight chain mannan

  branched at fairly regular intervals with uniform patterns.

  galactose ques on alternating mannose patterns,

  as described in the aforementioned Jaguar catalog from Stein-

  Hall Company The hydroxypropylated guar gum derivatives used in the present invention are hydrates of

  particulate, dry, water-soluble carbon having a dimension

  particulate sion such that a proportion of at least 90% passes through a mesh screen with 0.10 05 mm opening and an index of substitution MS moles from 0.2 to 0.8, preferably 0.3 at 0.65 In general, their 1% aqueous solutions have a p H of 5 to II and a viscosity of approximately 3 to 4 Pa s (3000 'i 4000 hundred ipoises measured on a Brookfield RVF viscometer using an N pin 3 rotating at 20 rpm at a temperature of 25 ° C., and the resulting solutions are thixotropic since the viscosity varies with the shearing force. It is possible to obtain hydroxypropylated guar gum derivatives.

  suitable from the Stein-Hall Company under the names

  Jaguar (R) HP 60, Jaguar (R) 1 PS and Jagular (5)

  HP II, which generally contain 5 to I 3%, preferably

  rence from 8 to 10% hu- midity as is.

  I 5 The hydroxypropylated guar gum derivatives are

  known to have thickening properties in solu-

  However, it is generally not known that a thickening agent improves the foaming properties of aqueous solutions containing surfactants, while

  the hydroxypropylated guar gommae derivative above aug-

  lies in the viscosity of a detergent formulation and improves its foaming power Since the volume of foam and its stability are often used to judge the cleaning power, it is advantageous to formulate a composition of detergent having better foaming power Another advantageous feature of the new detergent compositions of the invention containing said

  hydroxypropylated guar gum derivative is that it strengthened

  foaming agent with a thickening function which allows a reduction in the proportion of active ingredient of a formulation while maintaining its foaming power, which

  ensures a saving in the manufacturing cost of this pro-

  liquid detergent for small laundry Another advantage is that smaller amounts of this booster

  foam (O, OI at I%, compared to 3 to 6%) are necessary

  compared to conventional foam boosters,

  further reducing the cost of this detergent product.

  It has also been discovered that the nonionic hydroxypropyl derivative of guar gum acts as a foam stabilizer for certain detergent systems and has no effect on the behavior of the foam of other systems such as (linear alkyl) benzene sulfonate. / alkyl, ether sulfate, or (linear alkyl) benzene sulfonate / alkyl / ether sulfate / lauric-myristic monoethanolamide As a result, it has been found that the particular detergent system in which the behavior of the foam is greatly improved IO by the presence of the nonionic guar gum derivative is

  a ternary mixture containing an alkyl-ethenoxy-ether-

  sulphate, an alkyl sulphate and a betaine Thus, it is obvious that the particular detergent system used with the non-ionic hydroxypropylated derivative of guar gum I 5 is decisive for obtaining a liquid detergent for small washing whose foam behavior is strongly improved. The essential components of this liquid detergent

  for small wash contain an (alkyl in 08 to CI 8) ethé-

  noxy-ether-sulfate-water-soluble and an ammonium or alkali metal salt of a (C 8 to CI 8 alkyl) sulfate, both

  being anionic surfactants? and a betaine, preferably

  an amidobetaine, which is a zwitterionic surfactant, dissolved in an aqueous vehicle The betaine component represents approximately 2 to 3% and at most 5% by weight of

  the liquid detergent composition, and the anio surfactants

  picnics preferably represent around 20 to 30% in

  weight of the liquid composition, the ratio of the alkyl-

  ethenoxy ether sulfate to alkyl sulfate not being determined

  The present invention can be used

  1/29 to 29 / l ratios of alkyl sulfate to alkyl-

  ethenoxy-ether-sulfate and preferably I 7 / I 3 to I 2/8 res-

  pectively. The anionic surfactants which can be used in the detergent composition of the invention comprise at least one surfactant chosen from water-soluble salts, for example the sodium, potassium, ammonium and alkanolammonium salts, an (alkyl in C 8 to CI 8) sulfate, and preferably (C1 to CI 2 alkyl and CI 2 to CI 5) sulfates, for example lauryl sulfates, myristyl sulfates, etc;

  and at least one surfactant chosen from alkyl-ethenoxy-

  water-soluble ether sulphates of general formula R (CIH 2 CH 20) n O 503 M, in which R is an alkyl radical of 8 to I 8 atoms

  of carbon, N is an integer from I to I 2, and preferably

  between I and 5, and M is an alkali metal, ammonium or a

  alkylolanmonium, for example a lauryl-triethenoxy-ether-

  I O sulfate, (tridecyl alcohol) triethenoxy-ether-sulfate etc.

  Other anionic surfactants such as lauryl-sarcosi-

  nates, alkyl sulfonates, alkyl benzene sulfonates and (alcohol

  lauryl) sodium sulphate etc cannot be substituted

  killed in either of the above two groups of anionic surfactants as a component of the ternary detergent system of the present invention by coating a liquid product having a

better foam behavior.

  The betaine component of the detergent composition li-

  which of the invention corresponds to the general formula: R

R -NR-c 00-

  R R 3 in which RI is an alkyl group of IO with about 20 atoms

  of carbon, preferably I 2 to I 6 carbon atoms or the ra-

dical amido: O H ltl

R-C-N- (CM 2) a-

  wherein R is an alkyl group of about 9 to about 9 carbon atoms, and a is an integer from I to 4; R 2 and R 3 are each alkyl groups of I to 3 carbon atoms, and preferably to I carbon atom; R 4 is an alkylene group

  or hydroxyalkylene of I to 4 carbon atoms and, optionally-

  a hydroxyl group Examples of alkyldimethyl-

  betaines include decyl dimethyl betaine or 2-

  (N-decyl-N, N-dimethylaminmonio) acetate, coco-dimethyl betaine or 2 (N-coco-N, N-dimethylammonio) acetate, myristyl-dimethyl-betaine, palmityl-dimethyl-betaine lauryl- dimethyl betaine, cetyl dimethyl betalne, stearyl dimethyl betaine, etc. Amidobetaines include

  similarly co-coamidoethyl betaine, coco

  amidopropyl betaine etc. Io All of the above components of this small wash detergent are water soluble and remain water soluble

during storage.

  This particular combination of anio-

  niques et de betaine provides a ternary detergent system which cooperates with the nonionic hydroxypropylated derivative to give advantageous foaming properties,

  stability of foam and detergents as well as -

  advantageous viscosity characteristics The resulting homogeneous liquid detergent has a higher foaming behavior compared to the same detergent composition not containing the nonionic guar gum derivative, as indicated in Table I below, using the "Tergotometer" foam, in which soiled pellets (2.54 cm in diameter and 3.8 mm thick), each containing Ig of "Crisco" soiling, are added at specified intervals (every 2 minutes) at a 0.1% aqueous test solution with a hardness of 150 ppm in the form of Ca CO (Ca / Mg = 2 / I), and an alkalinity of 100 ppm in the form of HCO 3 at a temperature of 500 C, and stirred at 75 rpm for one minute The degree of foaming is recorded when the agitation stops after each addition of pellets and the total number of pellets necessary to destroy the

foam is recorded.

TABLE I

  No. of tablets detergent formula II 7 / I 3/3 AEOS / AIS Bétaine 19 2 I 7 / I 3/3 / 0.3 AEOS / A US Béta'ine / Jaguar HP-60 22 3 I 2/8/2 AEOS / ALS / Betaine 16 4 I 2/8/2 / 0.5 AEOS / ALS Betaine / Jaguar HP-60 19 AEOS = (CI 2-CI 5 alkyl) (C 2 H 40) 3-ammonium sulfate ALS = Lauryl sulphate of ammonium Beta'ine = Coco-amido-propyl-betaine Jaguar HP-60 = hydroxypropylated derivative of guar gum (9% of H 20) Io In addition, the addition of Jaguar HP-60 to formula 3 increases its viscosity by I 8 times, from 22.5 to 407.5 x I 0-3 Pa S using a Brookfield RVF viscometer,

  spindle N I, 20 rpm and a temperature of the solu-

  tion of 25 C In addition, the dirt removal power-

  I 5 res, which is an evaluation of the cleaning power, is not adversely affected by the presence of the guar gum derivative as a thickening agent, as shown in Table II, using a static immersion test A tablet containing dirt (0.5 g of soiling), as in the above-mentioned foam behavior test, which has aged for 1.5 minutes, is immersed for 30 seconds in a warm aqueous test solution (50 C) of hardness of I 50 ppm and alkalinity of IO O ppm and containing 0.1% detergent, and is immediately transported in an ice-water bath to interrupt the process of removing dirt The not removed dirt solidifies on the tablet which is air dried and the percentage of ES (removal of soiling) is calculated as follows: Amount of soil removed IOO

% ES =

Initial amount of soiling Io

TABLE II

  Effect of agent thicken on cleaning behavior Crisco% ES formula (dirt removal) Tallow "Keen" (fat)

I 94.4 77.2 50.6

2 96.0 78.0 50.6

3 94.8 80.4 52.6

4 96.6 78.4 51.6

  IO In addition to the above-mentioned essential components of liquid detergent for small washes, normal and conventional additives can also be used, provided that

  do not adversely affect the properties of the detergent.

  Thus, various dyes and perfumes can be used; of

  I 5 agents absorbing ultraviolet light such as -

  lvinuls ", which are products of the firm GAP Corpora-

  tion; preservatives such as formaldehyde and hydrogen peroxide; pearlescent agents and

  opacifiers; modifiers of p H; hydrotropic agents

  pes such as ammonium or sodium xylene sulfonate solubilizers such as ethyl alcohol, citric acid etc. The proportion of these adjuvants does not exceed

  normally not a total of I 5% of the composition of the deter-

  gent The percentages of most of these individual components represent a maximum of 5% and preferably

less than 5%.

  Liquid detergents for small washings such as dishwashing liquids are easily prepared by simple mixing processes from readily available components which, upon storage,

  do not adversely affect the total composition Cepen-

  It is essential that the guar gum derivative is added slowly and with stirring to the previously formed aqueous solution containing the ternary surfactant system The ternary surfactant system is prepared

  by adding, with stirring, an aqueous solution of alkyl-

25110 X 3

  II sulfate, then betaine to an aqueous solution of an alkyl-ethenoxyether-sulfate which may have been previously mixed with an agent such as ethyl alcohol and / or a xylene-sulfonate to promote the solubilization of said surfactants, then by adding , with stirring, the rest of the water to form the aqueous solution of the ternary surfactant system The use of moderate heating (up to 1000 C) promotes the solubilization of the surfactants The viscosities can be adjusted by varying IO the total percentage of the active ingredients and by modifying the percentage of the foaming and thickening agent the hydroxypropylated guar gum derivative In all these cases, the product obtained can be poured from a bottle or orifice with a relatively narrow mouth I 5 (1.5 cm in diameter) and the viscosity of the formulation of

  detergent should not be low enough to resemble

  ble with water The viscosity of the detergent must be at least 0.1 Pa S at room temperature, and it can reach approximately I Pa s Its viscosity can approach those of the commercially acceptable detergents found at currently on the market The viscosity of the detergent and the detergent itself remain stable at storage for extended periods of time without color change or deposition of any insoluble matter The phl of this formulation is preferably

  neutral, i.e. around 6 to 8.

  These products have surprisingly advanced properties.

  For example, the quality of the foam is superior.

  lower than conventional liquid detergents

  for small washing while using a lower pro-

serving of active ingredients.

  The following nonlimiting examples illustrate the invention.

EXAMPLES I AND 2

  Ingredients Example I Example 2 HP-601 O 0.5 g Citric acid O l, og Deionized water 36.06 g 34.56 g Alkyl-ether-sulfate 2 (AEOE, 58.3% / A *) 20.6 g 20.6 g Ethyl alcohol 5 g 5 g Xylene ammonium sulfonate (40% AI) 5 g 5 g Lauryl sulfate am Dnium (AS, 30 AI) 26.67 g 26.67 g Cocoamidoprcpylbetane (30% IA) 6.67 g 6.67 g Active ingredient I nonionic hydroxypropylated guar gum derivative

(9% H 20)

  2 (CI 2 CI 5 alkyl) (C 2 H 40) 3 ammonium sulphate The ratio of surfactants AEOS / ALS / betaine is

I 2/8/2.

  AEOS, alcohol and ammonium xylene sulfonate

  nium are mixed together until homogeneous and

  transparent, at room temperature, or at temperatures

  slightly high tures (maximum of I 00 o C) The lauryl-

  ammonium sulphate and betaine are then added with stirring, followed by water, while stirring the

  mixture to form an aqueous solution of the ter-

  nary of surfactants In Example 2, the derivative of

  guar gum and citric acid, which promotes the disso-

  guar gum lution, are added last and slowly with stirring The resulting product is a thickened solution without any sign of particulate suspension

or haste.

  The foam tests carried out with a "Tergotometer" on the "Crisco" soiling using the test solutions of Examples I and 2 show that I 6 pellets are washed with the formulation of Example I and I 9 pellets are washed with the formulation of Example 2 (containing the

  derived from guar gum), which represents an improvement

  large ration of foaming performance (the foam lasts until the pellet I 9) It is further noted that I 3 the dirt contained in the cups containing the composition of Example I (without the gum derivative

  guar) begin to appear on top of the solu-

  tion more quickly (after the addition of the 8 th pellet) than in the wells containing the solution of Example 2. The viscosity of the formulation of Example I is

  22.5 x IO -3 Pitch, which is too watery for a pro-

  food suitable for consumers; while the viscosity of the formulation of Example 2 is 407.5% x 10-3 Pa s, which is within the range of a product

  liquid detergent suitable for small washing.

  Variations can be made to the above formulations. For example, other alkyl sulphates can be substituted for ammonium lauryl sulphate, for example

  I 5 sodium lauryl sulfate, po lauryl sulfate

  tassium, ammonium, sodium and potassium myristyl sulfates, etc. Similarly, other alkyl ethenoxy ether sulfates may be substituted for the ammonium alkyl ethenoxy ether sulfate, for example a al Kyl-ethenoxy-ether sodium and potassium sulphate etc. Similarly, other betaines can be substituted for

  cocoamidopropyl betaine, for example cocoamido-

  thylbétaine, cocobétaine, etc. In addition, the amounts of each of the anionic components may vary, provided that the total sum

  specific groups of anionic surfactants represented

  smells about 20 to 30% by weight of the composition The amount of betaine can also vary up to a maximum of about 5% by weight of the composition -The amount of non-ionic hydroxypropylated guar gum derivative can also vary between O , OI and I% approximately,

  and preferably between 0.025 and 0.6% o by weight of the com-

  position according to the desired viscosity of the liquid detergent product obtained It has been found that a composition containing I%: of guar gum derivative gave a product which is too viscous. I 4

Claims (6)

CLAIMS I Liquid detergent composition, characterized in that it essentially consists of 0.1% OI by weight of a hydroxypropylated guar gum having a substitution mol index of 0.2 to 0.8 in an aqueous vehicle containing up to 40% by weight of a ternary mixture comprising a water-soluble salt of a (C 5 to CI 8 alkyl) ethenoxy-sther-sulfate containing from I to I 2 moles of ethylene oxide, a water-soluble salt of a (C 8 to C 8 alkyl) sulfate and an active tensio-IO zwitterionic betaine of formula: R + RI-N -R 4-COO- R 3 in which RI is an alkyl group of IO to 20 carbon atoms or an amido radical of formula RC (O) N (H) (CH 2) ao Rest an alkyl group of 9 to I 9 carbon atoms a and a is an integer from I to 4, R 2 and R 3 represent I 5 each of the alkyl groups of I to 3 carbon atoms, and R 4 is an alkylene or monohydroxyalkylene group of I to 4 carbon atoms, the weight ratio of the alkyl sulfate to the alkyl-ethenoxy-ethersulfa te being between I: 29 and 29: I, the concentration of betalne being not more than 5% of the weight of the composition, and said composition having better foam stability for greasy soiling, compared to the same composition not containing said guar gum.   2 Liquid detergent composition according to the res   dication I, characterized in that the water-soluble salt of the alkylethenoxy ether sulfate and of the alkyl sulfate is   chosen from alkali metal, ammonium and aluminum salts kylol sammonium.   3 Liquid detergent composition as claimed   cation 2, characterized in that the mixture of the alkyl 3 O I 5 sulfate and the alkyl-ethenoxy-ether-sulfate represents approximately 20 to 30% by weight and the betaine represents   about 2 to 5% by weight of the composition.   4 Liquid detergent composition according to the res   indication 2, characterized in that guar gum represents   feels 0.1 to 0.6% by weight of the composition.   Liquid detergent composition according to the res-   dication I, characterized in that the surfactant zwitte- rionique is an amidobetaine.   I O 6 Liquid detergent composition according to the resale   dication 2, characterized in that the alkyl sulfate is   ammonium lauryl sulphate, alkyl-ethenoxy-ether-sul-   fate is a (C 2 -C 5 alkyl) (C 2 H 40) I-5 ammonium sulfate   nium and betaine is cocoamidopropyl-dimethyl-betaine.   7 liquid detergent according to claim I, characterized in that the aqueous vehicle additionally contains   about I% by weight of citric acid.   8 A method of preparing the liquid detergent according to claim I, characterized in that first prepares an aqueous solution of the ternary mixture of surfactants by mixing at a temperature reaching at most IO O C; then the guar gum is slowly added in the form of particles having a size such that at least 90% of them pass through a mesh screen with a 0.010 mm opening with stirring; and continue this agitation until the guar gum is dissolved in the mixture.   9 Method according to claim 8, characterized   in that the aqueous solution of the ternary mixture of over-   factifs is prepared by mixing aqueous solutions of alkyl sulphate and alkyl ethenoxy-ether sulphate as surfactants, then adding with stirring betaine   then, with stirring, adding the rest of the water.   IO O Method according to claim 8, characterized   in that the aqueous solution of the ternary mixture of over-   factifs also contains a solubilizing agent and slowly adding up to 1% citric acid at the same time as guar gum to facilitate the dissolution of said gum: