FR2723377A1 - CLEANING OR STRIPPING COMPOSITIONS, AND PREPARATIONS CONTAINING THEM - Google Patents

Abstract

The invention relates to a cleaning or scouring composition in the form of an emulsion including at least one solvent fraction, comprising at least one solvent having a solvent power with respect to at least one resin, a surfactant fraction comprising at least one main non ionic surfactant, on the one hand said solvent fraction further comprising at least one co-solvent, said solvent and co-solvent being selected so that the solvent fraction is defined within the Hansen space by the partial parameter of polarity delta p and the partial parameter of hydrogen bond delta h, inside a parallepipede whose projection in the plane delta p, delta h is a rectangular surface having a length on the delta h axis of 16 (cal/cm<3>)<1/2>, that is 32,64 (J/cm<3>)<1/2>, from the point of origin 0, and a width on the delta p axis of 12 (cal/cm<3>)<1/2>, that is 24,48 (J/cm<3>)<1/2>, from the point of origin 0, and on the other hand said main non ionic surfactant is selected among alcohols, fatty acids and esters, ethoxylated or not, and whose long hydrophobic, saturated, linear, carbon chain has at least 18 carbon atoms.

Description

The invention relates to the field of cleaning agents such as detergents and

strippers, and in particular compositions in the form of an emulsion or of a stable microemulsion, intended to remove undesirable coatings of variable chemical constitution, of the paint type, and / or soiling, in particular highly encrusting, deposited on support surfaces of various kinds, for example of

application materials or skin.

By way of example, the compositions of the invention can be used to eliminate single-component or two-component paints not yet crosslinked or else crosslinked, mastics, glues, primers, inks, applied as a layer or accidentally sprayed or no, on hard substrates such as floors, walls, but also bodywork, and on more fragile plastic and composite substrates, as well as

on the skin, especially the hands.

To cover this broad spectrum of applications, such compositions must be particularly

effective, while preserving the cleaned support intact.

They must present a low harmfulness for the handler, must meet the requirements of standards such as those regulating the use of cleansing creams for the skin, and must have a viscosity such that their action can be exerted as well.

in horizontal than vertical application.

To obtain such properties, it is proposed according to EP-0 294 041, a cleaning composition, in emulsion form, comprising, as active ingredient, a solvent fraction or internal phase chosen from dibasic esters, having a power. solvent with respect to resins, water as the external phase, and a thickening agent, giving the composition a stability of

emulsion and thixotropy.

However, this solution has a major drawback linked to the use of thickeners. Indeed, these, after partial evaporation of the water from the emulsion, form a dry surface film. The latter 5 on the one hand does not prevent the further evaporation of water, especially when the ambient temperature is high, but on the other hand hardens easily and proves difficult.

to be eliminated according to the supports.

The Applicant provides a cleaning and / or stripping composition, in the form of an emulsion consisting of an internal phase dispersed in an external phase, which does not have the drawbacks described above. A subject of the present invention is in particular a composition

without thickening agent.

A composition according to the invention comprises at least one solvent fraction comprising at least one solvent, that is to say a solvent or a mixture of solvents and at least one cosolvent, that is to say a cosolvent or a mixture cosolvents, and a surfactant fraction, in the form of an emulsion which is stable over time, in particular retaining its flexibility, not or only slightly

harmful, not very flammable and biodegradable.

Before exposing the present invention, we define

below are some terms used in the description:

an emulsion is formed by the dispersion of a so-called internal phase in a so-called continuous external phase; a microemulsion consists of an internal phase in the form of microdroplets of size 10 to 100 times smaller than the droplets of an emulsion defined above; - The internal phase is according to the invention the active solvent phase vis-à-vis at least one resin, comprising at least one active solvent, and optionally at least one cosolvent; the external phase is the continuous phase of the emulsion, aqueous or non-aqueous, which may comprise at least one cosolvent; a cosolvent is a solvent which may or may not have a solvent activity with respect to at least one resin, making it possible to adjust the specific solvent power of the solvent fraction containing it; this cosolvent can itself

be soluble or not in the external phase.

According to the present invention, it has been discovered that a cleaning composition, not very aggressive, both towards the user and the environment, easily removable, stable and practically non-volatile, could be obtained, on the one hand. by adjusting the solvent power of the solvent fraction with a cosolvent, and on the other hand by using together with the solvent fraction as well

determined specific surfactants.

According to the invention, in combination, on the one hand, the solvent fraction is defined in Hansen space by its partial parameter of polarity Cp and its partial parameter of hydrogen bonding ah, inside a parallelepiped whose projection in the op plane, ah is a rectangular surface having a length on the axis ah of 16 (cal / cm3) 1/2, or 32.64 (J / cm3) 1/2 from the point of origin 0 , and a width on the axis ap of 12 (cal / cm3) 1/2, i.e. 24.48 (J / cm3) 1/2 from the point of origin 0, the value of the partial dispersion parameter ad n 'being not limiting, and on the other hand, said surfactant fraction comprises at least one main nonionic surfactant chosen from ethoxylated or nonethoxylated alcohols, fatty acids and esters, of which the long hydrophobic linear carbon chain has at least 18

carbon atoms, and in particular 18 carbon atoms.

Hansen's theory and the calculation of the parameters ad, ap, ah have been the subject of several publications such as C.M. HANSEN, J.P.T. (1967) 39, 104, the contents of which

is incorporated into this description as needed.

Although, as mentioned above, the value ôd is not limiting, it is advantageously between 7 and (cal / cm3) 1/2, that is to say between 14.28 and 20.4 (J / cm3) 1/2 According to the invention, the term “main surfactant” is understood to mean a surfactant which is essential in the compositions described and of which the proportion by weight is not

necessarily the majority in these compositions.

Said main nonionic surfactant is advantageously present in the composition in a concentration by weight of between 1 and 15% by weight.

total composition.

Preferably, this main nonionic surfactant is chosen from glycerol mono- and distearate, ethylene-glycol mono- and distearate, diethylene-glycol mono- and distearate and mono- and propylene glycol distearate, and ethoxylated stearyl alcohol with an ethoxylation number between 2 and 21, and any

mixture of these.

The compositions of the invention make it possible to make the most of the properties of the solvent fraction, while being able to initiate concentrations

weak of the latter.

Depending on the formulation of the various ingredients of the composition, it is possible to obtain compositions having a polyvalent activity, that is to say capable of acting on different coatings and soiling, or else very selective compositions acting specifically. on such coatings or

dirt.

According to the invention, said cosolvent will be chosen as a function of the reciprocal solubilities of the solvent and of the cosolvent, as well as their respective solubilities in water. In particular, the use of a co-solvent soluble in water with a solvent insoluble in water and In particular, the use of a co-solvent soluble in water with a solvent insoluble in water and in said cosolvent, will make it possible to

minimum concentration of said solvent in the composition.

Preferably, the solvent is chosen from dialkylesters, such as mixtures of adipate, glutarate and succinate of the RPDE type (marketed by the Rhône-Poulenc company) and DBE (marketed by the Dupont de Nemours company), but also dibutylphthalate , among monoalkylesters such as ethyl lactate, butyl lactate and other esters of lactic acid, propylene carbonate, ethylene carbonate, among

ethoxy esters such as propylene glycol acetate

methyl ether, propylene glycol diacetate, ethoxy-3-

ethyl propionate (abbreviated EEP), among the mono-n-butyl ethers of propylene glycol, of dipropylene

glycol and tripropylene glycol, and mono-t-ether

butyl of propylene glycol (abbreviated as PTB), among the

ketones such as methylphenyl ketone, N-methyl-

pyrrolidone and methyl isobutyl ketone, from organic acids such as mono- and di-carboxylic acids and polyfunctional acids such as oxalic acid, citric acid, lactic acid, and from organic bases such as alkylamines, or mixtures of

these.

The cosolvent is advantageously chosen from among

glycol derivatives including mono-, di- and tri-

and other polyethylenes and polypropylenes glycol, and hexylene glycol, from glycerol, sorbitol, dextrose and sucrose, from aliphatic and aromatic alcohols such as benzyl alcohol, from acetone, N-methyl-2 -pyrrolidone, y-butyrolactone,

as well as water, or any mixture thereof.

Advantageously, the solvent fraction will consist of a dimethyl ester or a mixture of dimethyl esters, as solvent, and monopropylene glycol

or glycerol, as a cosolvent.

According to the invention, the concentration by weight of the solvent fraction, comprising at least said solvent and a cosolvent, is between 1 and 90% of the total weight.

of the composition.

The surfactant fraction of the compositions of the invention further comprises at least one other surfactant, other than the main surfactant, chosen from nonionic surfactants,

anionic, amphoteric and cationic surfactants.

The other nonionic surfactant, different from the main surfactant, will preferably be chosen from ethoxylated fatty acids, ethoxylated fatty alcohols, ethoxylated nonylphenols, alkylpolyglucosides, ethoxylated or non-ethoxylated fatty amides,

ethoxylated or unethoxylated sorbitan esters, alkanolamides.

The other anionic surfactant will preferably be chosen from alkylsulphates, alkylethersulphates, alkylsulphosuccinates, esters.

ethoxylated fatty alcohol phosphorics.

The other amphoteric surfactant will preferably be chosen from alkylbetaine derivatives. When it is intended to incorporate a washing cream for the hands, a composition of the invention comprises, as a different surfactant from the main surfactant, a mixture of surfactants having a C12-C18 carbon chain, c 'that is to say C12, C14, C16, C18, with a proportion by weight of surfactants in C16-C18, at least equivalent to that in

C12-C14 surfactants.

For this application, a composition of the invention will advantageously comprise: - 1 to 30% by weight of dibasic esters, as solvent, - 1 to 30% by weight of monopropylene glycol or glycerol, as cosolvent, - 1 15% by weight of glycerol mono- or distearate, as main surfactant, - 1 to 30% by weight of surfactants, different from the main surfactant, chosen from nonionic, anionic and / or amphoteric,

- some water.

A washing cream of the invention particularly

advantageous has a complementary solvent power vis-

vis-à-vis the fatty substances provided by the surfactant fraction.

When it is intended to incorporate a stripping preparation, a composition of the invention comprises, as a surfactant other than the main surfactant, at least one surfactant chosen from those having a C8-C12 carbon chain and which are ethoxylated with an ethoxylation number included

between 1 and 5, or not ethoxylated.

For this application, a composition of the invention will advantageously comprise: - a solvent fraction in a proportion of 1 to 90% by weight, - i to 15% by weight of glycerol mono- or distearate, - i to 50% by weight surfactants other than the main surfactant

- 0 to 88% by weight of water.

The weight concentration of the surfactant, or surfactants other than the agent

main surfactant is at most equal to 50%.

Additives can be added to the compositions of the invention, in particular neutral, acidic or alkaline, organic or inorganic salts, or else organic or inorganic acids or bases. They may or may not be dissolved and then be present in any emulsion or composition according to the invention in the form of a filler such as a fine powder in suspension, which promotes the adsorption of the pigments of the resin removed by the composition of the. invention. In addition, faster and more complete cleaning when rinsing the substrate is

also got.

The characteristics of the invention are now illustrated by the appended drawing and by the following examples, from which other advantages will emerge and

applications of the present compositions.

In the drawing, FIG. 1 represents the projection in the plane (6p, ôh) of the solubility volumes according to Hansen's theory of two resins Rx and Ry, having in common a set of points; - Figure 2 represents the projection in the plane (ô, ôh) of the points defined in the Hansen space of the solvent fractions Ll, L2, L3, L4, N, D, M1, MG1, MG2, MG3, MG4, which are the subject of Examples 4, 5, and 6, and

points defined in the same space of pure solvents.

Example 1: Method of Preparation of Emulsions These emulsions are prepared according to the direct emulsion method. The surfactant constituents and water, if this is provided as an external phase in the composition, or the component constituting the external phase of the emulsion, are heated to 70 C / 80 C and mixed thoroughly. The cosolvent (s) and then the solvent (s), or both at the same time, are then added with constant stirring. Stirring is kept constant until complete cooling during which

the emulsion is formed.

Example 2:

Use of Hansen's theory to prepare a cleaning composition of the invention with specific activity General method: To prepare such compositions, it is necessary to know the volume (s) of solubility

in the space (6d, op, Ah) of the resin (s) to be cleaned.

This is obtained experimentally by studying the action on each resin of different solvent fractions (at variable% V) of at least two known solvents. These tests are carried out with different pairs of solvents for which the solubility parameters are known or for which the solubility parameters have been calculated. Each solvent fraction is

represented by a point in Hansen space.

Solvent fractions are classified into three categories: active, not very active (limiting action) or inactive. The representative points of the active fractions are located inside the solubility volume of the resin studied. The points representative of the not very active fractions are located on the envelope of this solubility volume. Points representative of fractions

inactive are located outside this same volume.

For practical reasons, and in accordance with Fig. 1, this solubility volume is represented by its

projection on the plane (6p, Ah), parallel to the axis bd.

In FIG. 1, point A represents an active solvent fraction on the two resins Rx and Ry. Point C represents a solvent fraction active only on the resin Rx. Points D and B represent two solvent fractions inactive on Rx and Ry. Each point can represent either a pure solvent or a mixture of

several solvents.

If point A represents a pure solvent A and point B a pure cosolvent B, by mixing A and B in suitable volume ratios, a solvent fraction C will be produced which will be active on the resin Rx and inactive on the resin Ry .

Example 3:

Preparation and use of a stripping composition according to the invention The formulation of composition I according to the invention is as follows, given in percentage by weight, the internal phase of the emulsion consisting of the solvent fraction and the external phase of water mixed with the surfactant fraction: * Solvent fraction: Solvents: dibasic ester DBE 25 dibutyl phthalate DBP 25 formic acid 0.8 Cosolvent: tripropylene glycol 11 * Surfactant fraction: Main surfactant: glycerol monostearate 10 Other surfactants: C10-C16 alkyl sulphate 6 (90% of active ingredients) Ethoxylated C10-C12 fatty alcohol (50E) 3 * Water 19.2 Composition I was tested on test plates of metal coated with a primer on which The following paints were applied: 1) Glossy air-dried glycerophthalic paint corresponding to the type of paint used in industry and construction, and formerly in the automobile. 2) Glossy glycerophthalic paint dried with

oven 3 hours at 100 C (accelerated aging).

3) Cellulose type paint 4) Two-component polyurethane paint, direct gloss, oven dried for one hour at 80 C

(current type of automotive paint).

Table 1 below gives the results of these tests and the stripping times required depending on the resins to be removed, the thickness of the films to be removed varying from 40 to 50 Am.

TABLE 1

Type of paint 1 2 3 4 minimum time of 9 min 75 min 60 min 80 min stripping * * removal of the resin and of the bonding primer The partial solubility parameters of the solvent phase of composition I correspond in Fig. 1 to a point of the point A type which is located inside the solubility volumes of the various pickled resins, and in Figure 2, at point D. These values clearly demonstrate the advantage of using such compositions which are practically free of odor, non-volatile, non-flammable and non-harmful, replacing strippers based on methylene chloride, which is very volatile and very harmful and which can cause irreversible effects on the health of users. Compositions such as composition I are admittedly slower than strippers based on methylene chloride, but they have the advantage of stripping more deeply in a single operation, without evaporation and without drying. Composition I after 48 hours at 35 C

is always flexible and perfectly rinsable with water.

These compositions are not afraid of freezing and are perfectly resistant to cycles of temperature variation between - 15 C and + 400 C without alteration of the emulsion, the latter resuming its characteristics.

initials by returning to room temperature.

Example 4:

Determination of the solvent fraction of a composition of the invention intended for cleaning a dirt consisting of an Rx resin applied to a support either coated with a surface coating Ry, or constituted in its mass, by a resin Ry which we want

preserve and restore.

This case is illustrated in figure 2. The following table 2 reports the results obtained experimentally which determine the limits (that is to say the envelope) of the volume of solubility, for a few pairs of solvents.

of an Rx resin to be cleaned.

Rx resin is a cellulose paint having

the color matte black.

TABLE 2

Solvent Cosolvent Solvent fraction

Type concentra- concentra-

Sh, 8p, 8d * tion Type tion Type 8h 8p Sd weight weight dibasic ester density 1.092 19.9 R, 2 16.7 8h 9.8 (4.8) 25 75 L1 (9.75) (4.02) (8.2) 8p 4, 7 (2.3) Sd 16.9 (8.3) tripropylene glycol monopropylene glycol density 1.024 density 1.032 IX, 4 6.3 16.1 6h 15.9 (7.8) 66, 7 6h 23.25 (11.4) 33.3 L2 (9, () (3,]) (7.9) Sp 4.9 (2.4) 6p 9.4 (4.6)? D 15 , 9 (7.8) Sd 16.7 (8.2) N-methylpyrrolidone density 1.031 19.2 I0.1 17.0 8h 7.1 (3.5) 25 75 L3 (9.42) (4, 95) (8.35) 8p 12.24 (6.0) bd 17.9 (8.8) glycerol density 1.260 18.2 12.1 17.6 8h 29.2 (14.3) 50 L4 (8 , 9) (5.95) (8.65) Sp 12.0 (5.9) Sd 17.3 (8.5) * 8h, 8p, Sd are expressed in (J / cm3) / 2, and between parenthesis in (cal / cm3) / l N The calculated values of bd, Èp, Ah for the four mixtures mentioned determine the four limit points representing four solvent fractions in action limit on the Rx resin which is a mat black cellulose paint, These four points determine a portion of the solubility volume of the

Rx resin.

Figure 2 represents the projection on the plane Sp, Ah of these points and of some pure solvents, the

bd value for these points being in parentheses.

The portion of the curve connecting the points L1, L2, L3, L4 represents the projection on the plane (6p, Ah) of the portion of the volume of solubility of the resin Rx determined previously. The points to the right of this curve represent solvent fractions inactive on the Rx resin. The points to the left of this same curve represent the

active solvent fractions.

Example 5: Application of a composition of the invention to the specific cleaning of a black cellulose paint to be removed from various types of paint to be preserved The following example is carried out on four test plates made of metal coated with an adhesion primer on which the following paints were applied: 1) Brilliant glycerophthalic paint dried at room temperature, very recent (applied 7 days before the cleaning test). This film remains very fragile

to solvent attack.

2) Glossy glycerophthalic paint dried with

oven for 3 hours at 100 C (accelerated aging).

3) "Poached", "satin" alkyd paint of a type commonly used in building paint for

exterior and interior (applied for 15 days).

4) Facade painting, white, with Pliolite (marketed by the Goodyear Company) waterproof and

microporous (applied for 15 days).

On these four tests, a cellulose paint is applied by spraying. The formulation of composition II used is as follows, given in percentage by weight: * Solvent fraction: DBE dibasic ester (solvent) 25 monopropylene glycol (cosolvent) 20 * Surfactant fraction: Main surfactant: glycerol monostearate 10 Other surfactants: ethoxylated oleic acid (60E) 23 C1o-C16 alkylsulfates 2 (90% active ingredient) * Water 19.2 Point N in Figure 2 represents the position in the Hansen space and in the (op, Ah) plane of the

solvent fraction of composition II.

Composition II is applied as follows: a first application is carried out with a brush, or a soft brush or a soft cloth for 2 minutes; the mechanical action accelerates the dissolution and emulsification of the pigments of the cellulose paint - rinse with water - a second application is carried out on a dry surface to complete the cleaning, with a mechanical action as above for 1 min

- rinsing with water.

The maximum total time for each test is less than or equal to 5 minutes for a complete cleaning of the cellulose paint. The four painting films at

to restore and preserve are perfectly intact.

Composition II has an emulsified solvent fraction: a) sufficiently solvent to dissolve the cellulose paint consisting of a resin and pigments, which are emulsified and maintained in the emulsion of the composition, by the surfactant phase of the latter, and these soiling becomes easily rinsable with water b) soft enough not to alter the paint film to be restored during the time required for

cleaning.

The example cited clearly shows the great versatility of such compositions and the advantages they provide to users. Composition II is practically odorless, non-volatile, non-flammable, non-harmful, completely biodegradable, and very effective with a low concentration of active solvent (DBE 25% w / w). The variants listed below in Table 3 with different main surfactants give the same

cleaning results (only the final viscosity is modified).

TABLE 3

CONSTITUENTS COMPOSITIONS

IIa IIb IIc IId Surfactant fraction: Gycerol mono-distearate 3 Ethylene glycol mono-distearate 7 10 Diethylene glycol mono-distearate 10 Polyethoxylated stearyl alcohol 5

(OE21)

Polyethoxylated stearyl alcohol 5 (EO2) Oleic acid + 60E 23 23 23 23 Alkyl sulfate 2 2 2 2 (90% active ingredients) Water 20 20 20 20 Solvent fraction: Dibasic esters (solvent) 25 25 25 25 Monopropylene glycol (cosolvent ) 20 20 20 20

100 100 100

Example 6:

Preparation of a composition of the invention for cleaning the hands a) case of a composition whose solvent fraction comprises a solvent soluble in the cosolvent and a cosolvent soluble in water, which means that the internal phase of the The emulsion consists of the solvent and the cosolvent and the external phase is aqueous and can

possibly include a little of the solvent fraction.

The formulation of composition III used is as follows, given in percentage by weight: * Solvent fraction: dibasic esters (solvent) 15 monopropylene glycol (cosolvent) 10 * Surfactant fraction: Main surfactant: glycerol monostearate 8 Other surfactant aqents: alkylsulphate in C12-C18 10 ethoxylated sorbitan monopalmitate (200E) 2 * Water 55 Point M1 shown in Fig 2 corresponds to a

solvent fraction with reduced active solvent content.

But it allows you to perfectly remove very

encrusting such as paints, sealants, inks, etc.

b) case of a composition whose solvent fraction comprises a solvent insoluble in the cosolvent and a cosolvent soluble in water, which means that the internal phase of the emulsion consists only of the solvent and

the external phase is aqueous and includes the cosolvent.

Four compositions MG1 to MG4 were prepared,

their formulations are presented in Table 4 below.

after.

TABLE 4

COMPOSITION MG1 MG2 MG3 MG4

Solvent fraction DBE 17.3 15 11 7.7 Glycerol 7.7 10 14 17.3 Surfactant fraction Glycerol mono-distearate 10 10 10 10 Alkyl sulfate C12-Cl8 10 10 10 10 Alkyl sulfate C16-C18 2 2 2 2 Water 53 53 53 53

100 100 100

Hansen's theory makes it possible to calculate the theoretical position of the solvent power of a mixture, even if it consists of at least two insoluble constituents; in this particular case, we will speak of points

virtual, obtained by projection in the plane (6p, ôh).

Thus, the four points MG1, MG2, MG3, MG4 are virtual points. The corresponding compositions MG3 and MG4 should not be active on soiling, however these four compositions are active on all paint soiling and in particular on matte black cellulose paint. At equilibrium, the internal phase of

the emulsion contains only emulsified DBE.

This case makes it possible to initiate even lower active solvent contents than in the previous case (the difference between the four compositions lies only

in the cleaning speed which decreases from MG1 to MG4).

Claims (13)

1. Cleaning or stripping composition, in the form of a stable emulsion or microemulsion consisting of an internal phase, comprising at least one non-harmful or not very harmful, not very flammable and biodegradable solvent fraction, comprising at least one solvent having a solvent power vis- with respect to at least one resin, and an external phase comprising a surfactant fraction comprising at least one main nonionic surfactant, characterized in that in combination, on the one hand, said solvent fraction also comprises at least one cosolvent, said solvent and cosolvent being chosen so that the solvent fraction is defined in Hansen space by the partial parameter of polarity Pp and the partial parameter of hydrogen bond ôh, inside a parallelepiped whose projection in the plane op, dh is a rectangular surface having a length on the axis ah of 16 (cal / cm3) / 2, or 32.64 (J / cm3) / 2, from the point of origin 0, and a width of the axis ap of 12 (cal / cm3) / 2, or 24.48 (J / cm3), / 2, from the point of origin 0, and on the other hand said main nonionic surfactant is chosen from alcohols, acids and esters ethoxylated or unethoxylated fatty acids whose long hydrophobic linear carbon chain has at least 18 carbon atoms, and in particular 18 carbon atoms, said composition containing almost no or no no thickener. 2. Composition according to claim 1, characterized in that said main nonionic surfactant is chosen from glycerol mono- and distearate, ethylene glycol mono- and distearate, diethylene glycol mono- and distearate and mono- and propylene glycol distearate, and ethoxylated stearyl alcohol with an ethoxylation number included between 2 and 21, and any mixture of these. main nonionic surfactant is between 1 and 15% of the total weight of the composition. 4. Composition according to claim 1, characterized in that said solvent is chosen from dialkylesters, such as mixtures of adipate, glutarate and succinate, but also dibutylphthalate, from monoalkylesters such as ethyl lactate, butyl lactate and other lactic acid esters, propylene carbonate, ethylene carbonate, among the ethoxy esters such as propylene glycol acetate methyl ether, propylene glycol diacetate, ethoxy-3- ethyl propionate, from the mono-n-butyl ethers of propylene glycol, dipropylene glycol and tripropylene glycol, and the monot-butyl ether of propylene glycol, among ketones such as methylphenyl ketone, N- methyl-pyrrolidone and methyl isobutyl ketone, from organic acids such as mono- and di-carboxylic acids and polyfunctional acids such as oxalic acid, citric acid, lactic acid, and from organic bases such as alkylamines, and any mixture of these. 5. Composition according to claim 1, characterized in that the cosolvent is chosen from glycol derivatives including mono-, di- and tri- and other polyethylenes and polypropylenes glycol, and hexylene glycol, from glycerol, sorbitol, dextrose and sucrose, from aliphatic and aromatic alcohols such as benzyl alcohol, from acetone, N-methyl-2 -pyrrolidone, y-butyrolactone, as well as water, and any mixture thereof. 6. Composition according to claims 4 and 5, characterized in that said solvent is a dimethyl ester or a mixture of dimethyl esters, and said cosolvent is monopropylene glycol or glycerol. 7. Composition according to claim 1, characterized in that the weight concentration of the solvent fraction is between 1 and 90% by weight. total composition. 8. Composition according to claim 1, characterized in that the surfactant fraction further comprises at least one other surfactant chosen from firstly nonionic surfactants different from said main nonionic surfactant, such as ethoxylated alcohols, ethoxylated nonylphenols. , alkylpolyglucosides, ethoxylated or non-ethoxylated fatty amides, ethoxylated or unethoxylated sorbitan esters, alkanolamides, secondly anionic surfactants, such as alkylsulphates, alkylethersulphates, alkylsulphosuccinates and phosphoric esters of ethoxylated fatty alcohol, amphoteric surfactants, such as alkylbetaine derivatives, and fourthly cationic surfactants. 9. Composition according to claim 8, characterized in that said other surfactant is a mixture of surfactants having a C12-C18 carbon chain, that is to say C12, C14, C16 and C18, with a weight proportion of C16-C18 surfactants, at least equivalent to that of C12-C14 surfactants 10. Composition according to claim 8, characterized in that said other surfactant is chosen from surfactants having a C8 carbon chain -C12, ethoxylated or not, ethoxylated surfactants having an ethoxylation number between 1 and 5. 11. Composition according to any one of claims 8 to 10, characterized in that the weight concentration of different surfactants of the main surfactant is at most equal to 50%. 12. Composition according to claims 9 and 11, characterized in that it comprises: - 1 to 30% by weight of dibasic esters, - 1 to 30% by weight of monopropylene glycol or glycerol, - 1 to 15% by weight of glycerol mono- or distearate - 1 to 30% by weight of surfactants, nonionic different from the main surfactant, and / or anionic and / or amphoteric, and - some water. 13. Composition according to claims 10 and 11, characterized in that it comprises: - a solvent fraction in a proportion of 1 to 90% by weight, - 1 to 15% by weight of glycerol mono- or distearate, - 1 to 50% by weight of different surfactants of the main surfactant - 0 to 88% by weight of water. 14. Hand washing cream characterized in that it incorporates as active principle a composition according to any one of claims 9, 11 and 12. 15. Cream according to claim 14, characterized in that the surfactant fraction of the composition has a complementary solvent power with respect to fat body. 16. Stripping preparation characterized in that it incorporates as active principle a composition according to any one of claims 10, 11 and 13.