WO1988010294A1

WO1988010294A1 - Concentrated softening compositions

Info

Publication number: WO1988010294A1
Application number: PCT/FR1988/000318
Authority: WO
Inventors: Daniel Charpin; Isabelle D'herbomez; Michèle Rozat
Original assignee: Cotelle S.A.
Priority date: 1987-06-16
Filing date: 1988-06-16
Publication date: 1988-12-29
Also published as: ATE105331T1; JPH01501492A; EP0296995A1; AU623859B2; AU1962588A; EP0296995B1; DE3889387D1

Abstract

A concentrated, liquid, water-soluble softening composition for textiles contains: a) from 10 to 50 % by weight of at least one softening agent A chosen from the quaternary ammonium salts having at least two long C8-C22 alkyl chains, if necessary interrupted by an ester, ether, or amide group; imidazolinium salts; and the reaction products of fatty acids with polyamines chosen from the group of hydroxyalkalenediamines and dialkylenetriamines, in which the alkyl and alkylene groups contain from 1 to 3 carbon atoms, b) from 0,1 to 1 % by weight of at least one cationic compound B chosen from the cationic compounds whose solubility in aqueous or aqueous-alcoholic medium is greater than that of the softenig compound A, c) from 2 to 35 % by weight of at least one solvent C, d) if necessary, adjuvants and/or other classic additives, and e) water for the complement, the content of solvent C being greater than 10 % by weight when the content of compound A is between 10 and 20 % and the content of compound B is between 0.1 and 5 %. Application to the washing of textiles.

Description

"Concentrated softening compositions"

The present invention relates to fabric softener compositions, in particular aqueous compositions containing relatively large amounts of softeners of the cationic type, intended for use in the rinse cycle of laundering operations. More particularly, the invention relates to concentrated aqueous compositions of cationic softeners whose viscosity is adjustable and which are clear and dilutable with water, the viscosity of the diluted compositions obtained being adjustable. The concentrated compositions have a low viscosity, making it possible to pour them, and stable over time, and are capable of being diluted, in particular by tap water, this water being at any temperature. The diluted compositions thus obtained have a viscosity acceptable to the housewife and greater than that of the concentrated composition. Concentrated cationic softener compositions are already known which can be diluted with water.

Document FR-A-2 51 960 describes compositions containing a softening agent which is a dialkyldimethylammonium chloride or a dialkylmethylethoxyammonium chloride in admixture with a non-softening agent which is an alkyldimethylbenzylammonium chloride, isopropyl alcohol and 'water. This document specifies that the compositions contain the non-softening agent at a concentration greater than 33% by weight, and the softening agent at a concentration lower than the concentration of the non-softening agent. The compositions described contain from 25% to 12.5% of dialkyldimethylammonium chloride or 12.5% of softening dialkylmethylethoxyammonium chloride and approximately from 33% to 50% of non-softening alkyldimethylbenzylammonium chloride. The aim of this publication is to obtain transparent compositions.

However, such compositions are expensive and of limited effectiveness, since they contain a large amount of cationic agent that is non-softening.

Document FR-A-2 540 901 describes compositions containing

- from 15 to 50% of dialkyldimethylammonium salts,

- from 10 to 50% of hydrophilic solvents, the weight ratio between the solvents and the dialkyldimethylamium monium salts being between 0.7 and 2.3.

These compositions may possibly contain aids solubilization agents, which are for example hydrophilic nonionic surfactants. The compositions are intended to be diluted with water.

The aim of this document is to obtain concentrated softener compositions which can be diluted with cold or lukewarm water. In the examples, it is always mentioned that such compositions contain a nonionic hydrophilic solubilizing agent.

However, the concentrated compositions described in these publications have the drawback of giving very dilute, low-viscosity compositions by dilution. Document FR-A-2 523 606 describes concentrated softening compositions for fabrics comprising 8 to 20% of a softener of the imidazolinium type and 0.5 to 5% of a quaternary ammonium compound either conventional or dicationic . These compositions are presented as stable even at low or high temperatures. They can be optionally supplemented by secondary proportions, namely between 0.5 and 10%, of other ingredients among which are lower aicanols. Compositions of this type are not clear and have a viscosity which increases with time, during storage.

Document EP-A-60 003 describes concentrated softening compositions for fabrics comprising 8 to 22% of a cationic softener 0.6 to 3% of at least one water-soluble polyalkoxylated ammonium salt and 0.2 to 5% of 'a fatty acid ester of a polyoi. The objective is to obtain stable compositions, the viscosity of which does not vary appreciably, even at high temperature and over long storage periods. The compositions thus formed are not clear.

The document EP-A-1 9 382 describes softening compositions which, in order not to lose their effectiveness when they are used in the presence of anionic or non-ionic detergents that the washing products contain, contain 3 to 35% of a mixture of: (a) 10-92% of the reaction product of higher fatty acids with a selected polyamine, (b) 8-90% of cationic nitrogen salts having a single long acyclic acyl chain at C. ₅ - C- ₂ , and (c) 0-80% of cationic nitrogen salts having at least two chains of this type or a chain of this type and an arylalkyl ring. The document FR-A-2 295 122 describes concentrated softening compositions for fabrics, stable with respect to temperature, not gelling and having a disinfecting action. These compositions comprise 30 to 60% of a cationic softening agent, 5 to 20% of a include 30 to 60% of a cationic softening agent, 5 to 20% of a cationic disinfectant, 5 to 20% of a nonionic dispersant and 15 to 0% of lower alkanols. It is expressly stated that the presence of non-ionic dispersants is essential for the concentrated product to disperse well in cold water.

Document EP-A-0 562 describes concentrated softener compositions containing a cationic softening agent and a nonionic agent in a ratio of between 10/1 and 3/2, alcohol and water; the objective is to obtain softener compositions, concentrated, which can be diluted with cold or lukewarm water.

However, housewives who dilute with tap water such compositions, concentrated to prepare diluted compositions to be stored before use, prefer to obtain diluted compositions having a viscous appearance. But the temperature of tap water varies. Thus, it can vary between +5 and + 25 ° C. It has been found that when the water temperature is of the order of + 5 ° C., the viscosity of the diluted compositions is then too high, and when the housewife pours the diluted composition into a container provided for this purpose in a machine. automatic washing machine, the diluted composition, the weakness of its high viscosity, and its tendency to form flocculates, can clog the amine pipe of the softening composition in the rinsing tank. In addition, the dispersion of the composition diluted in rinsing water is more difficult when the concentrated composition is diluted with cold water, for example having a temperature of approximately + 5 ° C. The invention aims to overcome these drawbacks.

The problems to be solved are as follows: Obtaining a softening composition concentrated in softening agents:

- clear and stable in storage between -15 and + 40 ° C, - dilutable with tap water, even cold,

- containing as little alcohol as possible,

- having a low viscosity, making it possible to pour it and stable over time, and

- giving a diluted composition, stable in storage, and whose viscosity is acceptable to the housewife and greater than that of the concentrated composition.

None of the prior art documents has described or suggested this problem of viscosity of the diluted compositions, high enough to be accepted by the user, but low enough to be able to flow through the lines of washing machines, these compositions having a homogeneous physical structure and not forming agglomerates which can clog the pipes and are easily dispersible in the rinsing water.

The present invention provides concentrated, clear, fabric softener compositions which can be diluted with cold water without forming particles or agglomerates capable of clogging small diameter pipes and which are stable in storage, both in concentrated state than diluted state.

The invention relates to a concentrated softener composition for textiles, dilutable with water, characterized in that it contains: a) from 10 to 50% by weight of at least one softening agent A, chosen from the salts of quaternary ammonium having at least two long alkyl chains of C _ç -C--, optionally interrupted by an ester, ether or amide; irnidazolinium salts; and the reaction products of fatty acids with polyamines chosen from the group of hydroxyalkylalkylenediamines and diaiκylènetriamines, in which the alkyl and alkylene groups contain from 1 to 3 carbon atoms b) from 0.1 to 10% by weight d 'At least one cationic compound B, chosen from cationic compounds whose solubility in aqueous or hydroalcoholic medium is greater than the solubility of the softening compound A,. .. c) from 2 to 35% by weight of at least one solvent C, d) optionally adjuvants and / or other conventional additives, and e) water for the remainder, the content of solvent C being greater than 10% by weight when there is simultaneously a content of compound A of between 10 and 20% and a content of compound B of between 0.1 and 5%.

The preferred compositions according to the invention are such that they contain from 20 to 50% of softening compound A, from 0.1% to 96% and more advantageously 0.1 to 3% of compound B, and from 10% to 30% 9-6 by weight of solvent C.

Cationic softening agents A of compositions according to the invention are described in particular in the article "Cationic Surfactants in Laundry Detergents and Laundry Aftertreatment Aids "- JAOCS, Vol 61, n ° 2 (February 1984), and can be chosen from the compounds having the following general formulas:

in which R. and R ^' may be the same or different and are chosen from the groups C 1 to C 6 alkyl or alkenyl optionally branched, optionally substituted by ether, ester or amide groups, R 1 and R 3 may be similar or different and are selected from C 1-6 alkyl groups. to C- ,, the benzyl groups, optionally substituted, or the groups - (C H- 0) xH in which n = 2 or 3, x = 1 to 5, X being a quaternization anion. It can for example be chosen from the group of halides, methylsulfate, ethylsulfate, acetate, phosphate, carbonate, lactate.

Examples of the compound of formula (I) are dimyristyldimethylammonium chloride, distearyldimethylammonium chloride, distearyl-2-hydroxypropylmethylammonium methyl sulfate, oleylstearyl dimethylammonium ethyl sulfate; ..

in which R- and R „are similar or different and are chosen from alkyl and alkenyl groups from C„ to C ₂₂ , optionally branched, R, is chosen from alkyl groups, substituted or unsubstituted, from C. to C ^, R ₇ is chosen from hydrogen or a C ₁ -,. Substituted or unsubstituted alkyl group,

X is a quaternization anion. It can for example be chosen from the group of halides, ethyl sulphate, methyl sulphate, acetate, phosphate, carbonate, lactate;

^O.

in which R _g and R. _ are similar or different and are chosen from optionally branched C 1 to C ₂ alkyl or alkenyl groups, R _{j 0} and R. . are the same or different and are selected from substituted or unsubstituted C 1 -C 4 alkyl groups,

X is a quaternization anion. It can for example be chosen from the group of halides, methylsulfate, ethylsulfate, acetate, phosphate, carbonate, lactate.

30

in which R, -, and R. - are similar or different and are chosen from C _g to C ₂₂ alkyl or alkenyl groups, optionally branched, R,. is chosen from hydrogen, the groups, methyl, ethyl and the group - (CH ₂ 0) xH, in which n is equal to 2 or 3 and x is between 1 and 5, and X is a chosen quaternization anion in the group of halides, methysulfate, ethylsulfate, acetate, phosphate, carbonate, lactate, for example.

Examples of compounds of formula (II) are 1-tallow-amidoethyl-2-tallow-imidazolinium methyl sulfate, 1-methyl-1-oleylamidoethyl-2-oleyl-imidazolinium, 1-methyl-1-paImitoleylamidoethyl-2- palmitoleyl-imidazolinium, l-methyl-l-tallow-amidoethyI-2-tallow-imidazolinium, l-methyl-l-tallow hydrogenated-amidoethyl-2-tallow hydrogenatedimidazolinium. Examples of compounds of formula (III) are methyl sulphate

1-ethylene-bis (2-stearyl, 1-methylimidazolinium), 1-ethylene-bis (2-oleyl-1-methylimidazolinium), 1-ethylene-bis (2-tallow-1-methylimidazolinium).

Examples of compounds of formula (IV) are: di (2-hydrogenated tallow-arnidoethyD-hydroxyethylammoniurn, di (2-hydrogenated tallow-amidoethyl) -di-methylammonium and methyl-di (2-palmity-lamidoethyD) methyl sulfate -hydroxyethyiammonium.

The agents B according to the invention are in practice chosen from quaternary ammonium salts and polyammonium salts, these compounds possibly containing a single long C 1 -C 6 alkyl chain. Preferably, agents B are chosen from salts of quaternary mono- or poly-ammonium or imidazolinium compounds, optionally bactericides or their mixture.

The cationic compounds B according to the invention can thus be chosen from the compounds having the following general formulas:

in which R is a C 1 -C 4 aliphatic or hydroxyalkoxy group, optionally polyoxyalkylated,

R,, is chosen from alkyl or alkenyl groups having from 8 to 22 carbon atoms, preferably from 8 to 10 carbon atoms, optionally branched, optionally substituted by ether, ester or amide groups,

R _{] 7} is chosen from alkyl or alkenyl groups having from 1 to 4 carbon atoms, optionally branched,

R. c is selected from alkyl or alkenyl groups having 8 to 18 carbon ^'atoms, preferably 12 to 16 carbon atoms. R. _ and R_ _n are chosen from hydrogen or halogen,

Y is "a quaternization anion. It can for example be chosen from the group of halides, methylsulfate, ethylsulfate, acetate, phosphonate, carbonate, lactate.

Examples of agents B of formulas (V) or (VI) are: iauryldimethylbenzylammonium chloride, alkyldimethylbenzylammonium chloride in which the alkyl radical is C, ₇ - C o, trimethyldodecylbenzylammonium chloride ,. methyl-bis (2-hydroxyethyl) -oleylammonium chloride, methyl-i-capryI-2-caprylamido-3-ethyl-imidazoIiniurn methysulfate. The cationic compounds B can also be chosen from the compounds having the following general formula: (VII) ^R ₂ X

in which R_. is a C „to C .-, -, optionally _{] n} aliphatic group, branched, optionally unsaturated,

R__ is chosen from the groups H, alkyl, hydroxyalkyl, hydroxyalkoxy in C _j - C ^, n is an integer from 1 to 6, m is an integer from 1 to 5, 5 X ~ is a quaternization anion. It can for example be chosen from the group of halides, methylsulfate, ethylsulfate, acetate, phosphate, carbonate, lactate.

Examples of agents B of formula (VII) are: N- dimethosulfate (tallow derivative) -N, N, N, N -tetramethyl-1,3-propane-diammonium, N- dimethosulfate (derivative of tallow) -N, N, N-trimethyl-1,3-propane-diammonium, N-oleyl-N dimethosulfate, N, N, N, N -pentamethyl-1,3-propanediamonium, N dimethosulfate - (derivative of tallow) -N, N, N, N, N -pentamethyl-1,3- propanediammonium, N-stearyl-N, N, N, N, N, N -pentamethyl-1,3-propanediam- dimethosulfate monium, the diacetate of N-st earyloxypropyl-N, N, 1 ¹ ,, N, 1 ⁱ -tri (3-hydroxypropyl) -1,3-propane-diammonium.

The preferred agents B according to the invention are coco-bis (2-hydroxyethyl) methylammonium chloride, for example ETHO QUAD 0/12, containing 25% of isopropanol and manufactured by AKZO or oleyl-bis chloride (2-hydroxyethyl) methylammonium, for example ETHO QUAD 0/12, containing 25% of isopropanol and manufactured by AKZO. The compounds B according to the invention can also be chosen from the compounds having the general formulas (II), (III) and (IV), mentioned above, in which R_- and R „, R _g and R. -, R. _ and R. ^ are selected from C, -C, alkyl or alkenyl groups, optionally branched.

The solvents C according to the invention can be chosen from hydroxylated solvents or their mixtures, for example alcohols, polyols, polyol ethers, polyether polyols; the preferred solvents are isopropanol, isobutanol, n-propanol, methyl-2-pentanediol-2,4, 1,2-propy-

10. lenegiycol and the monomethyl ether of monopropylene glycol.

According to a preferred embodiment of the invention, the softening agent is 1-oieylamidoethyl-2-oleylimidazoinium methosulfate, for example in solution in isopropanol or in solution in 1,2-propylene glycol at 75% fabric softener and 25% alcohol. Such preferred compounds are marketed by REWO under the trade names REWO QU AT W 3690 and REWOQUAT W 3690 / PG.

Another preferred compound is disuif-2-hydroxypropylmethylammonium chloride sold under the name PRAEPAGEN WKL by HOECHST.

Without wishing to be bound by any theory, it is believed that component B makes it possible, in combination with solvent C, to fluidize and make the composition clear; moreover, the addition of component B makes it possible to reduce the content of solvent C, but only to a certain extent, since too large a proportion of component B would exert an undesired effect of lowering the viscosity of the diluted composition.

For the preparation of the compositions according to the invention, it is simply necessary: - in the case of ingredients which are liquid at room temperature, to mix them cold in any order,

- in the event that one of the Ingredients is not liquid at room temperature, heat this ingredient to make it melt and add to the melt obtained the other Ingredients, respecting the precautions for use, and preferably adding the solvent 35 C first and lastly the water.

The invention makes it possible to achieve the objectives mentioned above. The dilute, viscous and stable compositions which the present invention makes it possible to obtain can be prepared by dilution with city water, even cold, of the above-mentioned concentrated compositions; the dilution ratio is preferably from 1: 2 to 1:10, advantageously from 1: 4 for a composition concentrated to around 20% of cationic softening active material A.

The compositions according to the invention, used in appropriate quantities in the last rinsing cycle following the washing of loads of laundry in a domestic washing machine provide a completely suitable softening of the laundry.

The invention is described in more detail in the examples below, which do not limit it in any way. In these examples, all the percentages are given by weight on the weight of the total composition. The percentages indicated refer to the active material, without taking account of the solvents usually present in the commercial products containing them. Comparative example

The following composition is produced: DSIM-MS (*) 20 96 LDi BAC (**) 0 96

Isopropanol 14 9-6 Perfume 1 96

Water q.s.p. 100 96

An unstable gel is obtained. (*) DSIM-MS: l-tallow-amidoethyl-2-tallow-imidazolinium methyl sulfate. (**) LDMBAC: lauryldimethylbenzylammαnium chloride. Example 1

The following composition is produced by mixing: Agent A: DSHPMAC (*) 18.35% Agent B: O DHMAC (**) ^" 1, 65 96

Solvent C: Isopropanol 15%

Perfume '0.77%

Dye (1 96 solution) 0.6 96

Water qs 100 96 (*) di-tallow-2-hydroxypropyl methylammonium chloride sold under the name PRAEPAGEN WKL by the company HOECHST. (**) oleyl-bis (2-hydroxyethyl) -nethylammonium chloride, marketed under the name ETHOQUAD 0/12 by the company AKZO.

The composition obtained is fluid and clear. Its viscosity (measured with the Brookfield viscometer, mobile 1, at 6 revolutions / minute) is 35 mpa.s. After adding three times its volume of tap water to this composition, a dilute composition is obtained, the viscosity of which (measured under the same conditions) is 210 mpa.s after 1 week and 480 mpa.s after 2 months. .

The concentrated composition is stable at room temperature and at 40 ° C for more than a year. At -15 ° C. the concentrated composition takes on the consistency of a gel, but which is fairly fluid and which disappears to give a completely fluid composition after returning to ambient temperature.

Example 2

The following composition is prepared by mixing: DSHPMAC 20%

ODHMAC 2.04 96

Isopropanol 7.10 96

Dipropylene glycoi 18 96

Perfume 0.97 96 Colorant (solution at 196) 0.6 96

Water q.s.p. 100 96

The composition thus obtained is fluid and clear. It is stable and has a viscosity (measured with a Brookfield viscometer, mobile 2, at 12 revolutions / minute) of 50 mpa.s after 1 day and the same again after 1 month.

After adding three times its volume of tap water to this composition, a dilute, stable composition is obtained, the viscosity of which (measured with a Brookfield viscometer, mobile 1, at 6 revolutions / minute) is 203 mpa.s after 1 day and 486 mpa.s after 1 month. Example 3

The following composition is prepared by mixing: DSHPMAC 20%

ODHMAC 2.04-96

Isopropanol 7.10 96 Monomethyl ether of monopropylene glycol 14 96

Perfume 0.97 96 Dye (solution at 196) 0.6 96

Water q.s.p. 100 96

The composition obtained is fluid and clear. It is stable and has a viscosity (measured with a Brookfield viscometer, mobile 2, at 12 revolutions / minute) of 40 mpa.s after 1 day and 30 mpa.s after 1 month. After adding three times its volume of tap water to this composition, a stable dilute composition is obtained, the viscosity (measured with a Brookfield viscometer, mobile 1, at 6 revolutions / minute) is 549 mpa.s after 1 day and 900 mpa.s after 1 month. Example 4

The following composition is prepared by mixing: DOIMMS (*) 50 96

ODHMAC 10 96

Isopropanol 3.34 96 Perfume 0.97 96

Dye (1% solution) 0.8 96

Water q.s.p. 100%

(*) 1-oleylamidoethyl-2-oleylimidazolinium methosulfate sold under the name REWOQUAT W-3690 by the company REWO. The composition obtained is fluid and clear. Its viscosity (measured with the Brookfield viscometer, mobile 2, at 12 revolutions / minute) is 30 mpa.s after 4 days. After adding nine times its volume of tap water to this solution, a diluted composition is obtained, the viscosity (measured with a Brookfield viscometer, mobile 1, at 6 revolutions / minute) is 132 mpa.s after 4 days. Example 5

The influence of the temperature of the dilution water of a concentrated composition is studied on the viscosity of the diluted composition. The following compounds are mixed: DOIMMS 20 96

ODHMAC 2%

Isopropanol 20 96

Perfume 1 96

Water qs 100 96 This concentrated composition is diluted with three times its volume of water. The viscosities are measured with a Brookfield viscometer, mobile 1, at 6 revolutions / minute. Depending on the temperature of the dilution water, dilute compositions are obtained, the viscosities of which are given in Table 1.

Table 1

Water temperature Viscosity of the dilution (° C) diluted composition (mPa.s)

10 180-200

20 75-100

30 25-30

40 15-20

It can therefore be seen that the compositions according to the invention have a viscosity greater than 100 mPa.s for dilution water temperatures lower than 20 ° C. However, a viscosity greater than ^~ 100 mPa.s, preferably 100-200 mPa.s, is a viscosity which is perceived by the housewife as the index of an effective product. Example 6

The influence of the weight ratio of the quantity of softening agent A to the quantity of non-softening cationic compound B is studied. The following compositions are produced:

(A) DOIMMS

(B) ODHMAC

(C) Isopropanol Perfume 1% Water q.s.p. 100%

The quantities of agent A, agent B and isopropanol are varied, the quantity of perfume always being equal to 1% by weight of the composition. These compositions are diluted with water at 20 ° C. to obtain diluted compositions containing 5% by weight of softening agent A. The viscosities of the diluted compositions thus obtained are measured, with a Brookfield viscometer, mobile 1, speed 6 turns /minute. The following results are obtained (cf. table 2): Table 2

(*) Viscosity of the diluted composition It can therefore be seen that when the percentage by weight of non-softening compound B is greater than the percentage by weight of softening compound

A, the viscosity of the composition diluted with 5% of softening compound is low. On the contrary, when very little non-softening agent has been added

B, for example from 100 to 400 times less for the amount of softening agent A, the viscosities of the diluted compositions containing 5% by weight of softening agent A are between 100 and 160 mPa.s.

Example 7

We study, at equal concentrations, the influence of a cationic non-softening agent in an aqueous softening agent composition, compared to the influence of a non-ionic agent, a) The following concentrated composition is produced:

16% of N-methyl methyl sulfate, N, N, di (beta-C ₁ -C. _R acyloxyethyl) N-beta-hydroxyethylammonium marketed under the name STEPANTEX Q 185 by the company STEPAN EUROPE,

1 1 96 isopropyl alcohol,

4 96 of a mixture of nonionic surfactant and also nonionic emulsifier,

1% perfume, q.s.p. 100% water.

The composition obtained has a viscosity allowing it to be poured. This composition is diluted with three times its volume of water, the water being at 10 ° C or 20 ° C. A diluted composition is then obtained which forms lumps and whose viscosity is very high: / 1000 mPa.s (measured with the Brookfield viscometer, mobile n ° 1, 6 turns / - minute). b) The following concentrated composition is produced: 16% DOIMMS, 4% ODHMAC, 11% isopropanol,

1% perfume, q.s.p. 100 96 of water. This composition is diluted with three times its volume of water, the temperature of the dilution water being 10 ° C. The viscosity of the diluted composition is 10 mPa.s (measured in the same way as for Example 4a).

It can therefore be seen that the technical function of the non-softening cationic agent is different from the technical function of the nonionic agent. Depending on the amount of non-softening cationic agent in the concentrated composition, the viscosity of the diluted composition can be adjusted to a value acceptable to the housewife (preferably between 50 and 900 mPa.s).

Indeed, Examples 3b and 4b show that, for a composition containing approximately 15% of softening agent A and 0.1% of non-softening agent B, the viscosity of the diluted composition is 160 mPa.s, then that for a composition containing 496 of non-softening agent B, the viscosity of the diluted composition is 10 mPa.s.

In addition, when the diluted compositions 4a and 4b obtained from the concentrated compositions are dispersed in cold water, it can be seen that the diluted composition 4a is very difficult to disperse and that it is necessary to shake by hand for several tens of seconds to obtain good dispersion in water. On the contrary, the diluted composition 4b disperses very easily in water at 10 ° C (in less than 5 seconds). Example 8

The following composition is prepared: 20 96 of DSHPM-AC,

2 96 from ODHMAC,

13 96 of 1,2-propylene glycol, 11% isopropanol 1% perfume, qs 100% water. This composition is diluted with three times its volume of water. The temperature of the dilution water is 10 ° C.

A dilute, stable composition is obtained, the viscosity of which, measured in the same manner as in the previous examples, is 260 mPa.s.

Claims

1 - Concentrated softener composition for textiles, dilutable with water, characterized in that it contains: a) from 10 to 50% by weight of at least one softening agent A chosen from quaternary ammonium salts having at least two long C 1 -C ₂₂ alkyl chains, optionally interrupted by an ester, ether or amide group; imidazolinium salts; the reaction products of fatty acids with polyamines chosen from the group of hydroxyalkylalkyenediamines and dialkylenetriamines, in which the alkyl and alkylene groups contain from 1 to 3 carbon atoms, b) from 0.1 to 10 96 by weight d '' at least one cationic compound B chosen from cationic compounds whose solubility in aqueous or hydroalcoholic medium is greater than the solubility of softening compound A; the weight ratio A / B being greater than 1, c) from 2 to 35% by weight of at least one solvent C. d) optionally adjuvants and / or other conventional additives, and e) water for the addition, the content of solvent C being greater than 10% by weight when there is simultaneously a content of compound A of between 10 and 20% and a content of compound B of between 0.1 and 5%.

2 - Composition according to claim 1, characterized in that it contains from 0.1 to 10% by weight of compound B.

3 - Composition according to any one of claims 1 and

2, characterized in that it contains from 10 to 30% by weight of compound C.

4 - Composition according to any one of claims 1 to

3, characterized in that the softening agents A are chosen from the compounds having the following general formulas:

in which R. and R ₂ may be similar or different and are chosen from C 1 to C 4 alkyl or alkenyl groups, optionally branched, optionally substituted with ether, ester or amide groups,

R ~ 3, e -t- R - ^ ,. may be similar or different and are chosen from C 1 to C 6 alkyl groups, benzyl groups, optionally substituted, or - (CH ₂ O) H groups in which n - 2 or 3, x - 1 to 5, X being a quaternization anion;

in which R_- and R, are similar or different and are chosen from alkyl and alkenyl groups from C _g to C ₂₂ , optionally branched, R, is chosen from alkyl groups, substituted or unsubstituted, from C to C ^, R-, is chosen from hydrogen or substituted or unsubstituted alkyl groups, C _j -C ^, X is an anion having the same meaning as in formula (I),

in which R _g and R. _ are similar or different and are chosen from C 2 -C ₂₂ alkyl or alkenyl groups, optionally branched,

R _{j 0} and R _.. are similar or different and are chosen from substituted or unsubstituted alkyl groups, in C 1 -C 4, X is an anion having the same meaning as in formula (I),

in which R., and R., - are similar or different and are chosen from the group formed by C 2 -C ₂₂ alkyl or alkenyl radicals, optionally branched,

R 14 is chosen from the group formed by H, the methyl, ethyl and - (CH ₂ O) H radicals, in which n is equal to 2 or 3 and x is between

1 and 5, and X is an anion having the same meaning as in formula (I).

5 - Composition according to any one of claims 1 to 4, characterized in that the softening agent A is l-oieylamidoethyl-2-oleylimidazollnium methosulfate.

6 - Composition according to any one of claims 1 to 4, characterized in that the softening agent A is di-tallow-2-hydroxypro pyl ethylam monium chloride.

7 - Composition according to any one of claims I to 4, characterized in that the softening agent A is methyI-bis (tallow-amidoethyl) -2-hydroxyethylammonium ammonium methosulfate.

8 - Composition according to any one of claims 1 to 7, characterized in that the agent B is chosen from ammonium salts quaternary and polyammonium salts, this compound possibly containing a single long C ₈ -C ₂₂ alkyl chain.

9 - Composition according to any one of claims 1 to 8, characterized in that the agent B is chosen from the compounds of the following general formulas:

in which R is a C or hydroxyalkoxy radical. -VS. , possibly polyoxyalkylated,

R,. is chosen from alkyl or alkenyl groups having from 8 to 22 carbon atoms, preferably from 8 to 10 carbon atoms, optionally branched, optionally substituted by ether, ester or amide groups, R _{] 7} is chosen from alkyl groups or alkenyl having from 1 to 4 carbon atoms, optionally branched,

R. g is chosen from alkyl or alkenyl groups having from 8 to 12 carbon atoms, preferably from 12 to 16 carbon atoms,

R. _Q and R _2Q are chosen from hydrogen or halogen,

Y ^" is an anion having the same meaning as X in formula (I),

in which R-. is a C _g to C ₂₂ aliphatic radical, optionally branched, optionally unsaturated,

R ₂₂ is chosen from the groups H, alkyl, hydroxyalkyl, C 1 -C 4 hydroxyalkoxy, n is an integer from 1 to 6, m is an integer from 1 to 5,

X is an anion having the same meaning as in formula (I).

10 - Composition according to any one of claims 1 to 9, characterized in that the agent B is lauryldimethyl-benzylammonium chloride.

11 - Composition according to any one of Claims 1 to 9, characterized in that the agent B is coco-bls chloride (2-hydroxy-ethyDmethylam monium. 12 - Composition according to any one of Claims 1 to 9 , characterized in that agent B is oleyl-bis (2-hydroxyethyDmethylammonium chloride).

13 - Composition according to any one of claims 1 to 12, characterized in that the solvent C is chosen from hydroxyl solvents or their mixtures, and in particular from alcohols, polyols, polyol ethers and polyether polyols.

14 - Composition according to any one of claims 1 to 13, characterized in that the solvent is chosen from isopropanol, i'isobutanol, n-propanol, methyl-2-pentanediol-2,4, 1, 2-propylene glycol and the monomethyl ether of monopropylene glycol.