ES2317370T3 - STABLE WATERY COMPOSITIONS OF ESTERES CUATES. - Google Patents

Abstract

Aqueous compositions that are composed of a quatter ester or mixtures of four esters of the formula (I) in which R is C1-C4 alkyl, preferably methyl, X has the same meaning as R or X is a group of the formula - C2H4OR 2, R 1 and R 2 are independently hydrogen or a group -COR 3, R 3 is C7-C21 alkyl or C7-C 21 alkenyl and A is an anion, preferably chloride or methosulfate, a metal salt and optionally one or more auxiliary agents selected from the set consisting of electrolytes, perfumes, perfume vehicles, colorants, hydrophobic agents, anti-foaming agents, thickeners, opacifying agents, preservatives and anti-corrosive agents, concomitant surfactants and solvents, the composition of which is exempt from metal or alkaline earth salts, complex compounds of metals and phthalocyanine and metal salts of phthalocyanine.

Description

Stable aqueous ester compositions you guys

Quaternized esters of triethanolamine (TEA) with fatty acids and quaternized esters of methyldiethanolamine (MDEA) with fatty acids, which are usually called "ester esters" are widely known in the detergent industry. They provide an effect. fabric softener, especially those of cotton. These compounds are prepared by esterification of triethanolamine (TEA) or methyldiethanolamine (MDEA) with a fatty acid and by subsequent quaternization by reacting with a sulfate alkyl or short chain alkyl chloride. In operation esterification of ester esters of TEA, one, two or three groups hydroxyl can react with fatty acid and correspondingly, the ester ester compositions commercially available contain mono-, di- and tri-ester quates quaternized In the case of MDEA's four esters, they are only present mono- and di-esters quates.

A problem of aqueous compositions that contain these esters cuates is that the esters cuates they are not stable during prolonged storage, since They undergo hydrolysis. In order to prevent a hydrolysis, it is known to add alkali metal salts (document Japanese patent JP 10-251 972).

It has now been found that other salts also Metallic are able to prevent the hydrolysis of esters you guys

The invention correspondingly provides aqueous compositions that are composed of a cuat ester or mixtures of ester esters of formula I

one

in which R is alkyl of C 1 -C 4, preferably methyl, X has the same meaning that R or X is a group of the formula -C 2 H 4 OR 2, R 1 and R 2 are independently hydrogen or a group -COR 3, R 3 is alkyl of C_ {7} -C_ {21} or alkenyl of C 7 -C 21 and A is an anion, preferably that of chloride or methosulfate, and a metal salt, and optionally one or more auxiliary agents as defined in claim 1, whose composition is free of alkali metal salts or alkaline earth, of complex compounds of metals and phthalocyanine or metal salts of Phthalocyanine

Since X in formula (I) can be either an alkyl group R or an additional hydroxyalkyl group that can be esterified, the claimed compositions contain or either TEA ester esters or MDEA quarte esters of the following formulas II and III:

2

The group -COR3 is preferably derived from a fatty acid that occurs in nature such as acid caproic acid, caprylic acid, capric acid, lauric acid, acid myristic, palmitic acid, isostearic acid, stearic acid, oleic acid, elaidic acid, arachidic acid, behenic acid and acid erect. Preferred acids, which contain the group -COR3, are C 12 / C 18 coconut fatty acids, a fatty acid of tallow, a totally or partially hydrogenated tallow fatty acid, a palm fatty acid, a palm fatty acid partially or totally hydrogenated or stearic acid.

As mentioned before, the ester esters of the formula II are present in the form of mixtures of the mono-, di- or tri-esters of triethanolamine. Preferred mixtures are those containing 10 to 38% by weight of the monoester (being R 1 and R 2 hydrogen), from 46 to 63% by weight of the diester (R 1 being hydrogen and R 2 -COR 3) and 7 to 25% in Triester weight (R 1 and R 2 -COR 3 being). Be they especially prefer the following mixtures (all percentages are by weight):

monoester: 18-22%; diester 58-62%; Triester 18-22%.

monoester: 20-27%; diester 53-60%; Triester 16-23%.

monoester: 29-37%; diester 46-57%; Triester 7-14%.

In the same way, the four esters of the Formula III are presented in the form of mixtures of mono- and methyldiethanolamine di-esters. Preferred mixtures are the with 1 to 70% by weight of the monoester (R 1 being hydrogen) and 30 to 99% by weight of the diester (R 1 being -COR 3). The following are also especially preferred mixtures (all percentages are by weight): monoester 2-60%; 35-98% diester and monoester 2-40%; 60-98% diester.

The ester compositions according to with the present invention they generally contain from 0.5 to 30, so preferably from 2 to 24 and especially from 4 to 22% by weight of the Four esters of formula II. In order to increase the stability of these aqueous compositions, a salt is added that does not It is an alkali metal or metal salt alkaline earth. The claimed compositions They are exempt from salts of this type. Preferred salts are certain transition metal salts; the most preferred are zinc and aluminum salts such as ZnSO4, ZnCl2, AlCl 3 or Al 2 (SO 4) 3. These salts they are present in a proportion that is preferably 0.002 to 10.0, preferably 0.03 to 5.0 and more preferably from 0.04 to 3.0% by weight.

In a preferred aspect, the compositions of according to the invention they are also free of metal salts of rare earths, metal salts of fatty acids or agents chelators

The compositions according to the present invention can be prepared by mixing the aqueous solution of the four esters of formulas II and III with final formulations of softeners with salt. Salt can be added at any time during the process of preparing softening agents and can be either in a solid form or in an aqueous solution. Be recommends heating and stirring to prepare the compositions claimed.

In order to make the preparation of the described object of the invention, a pre-mix can be prepared concentrate that contains the same molar and / or mass ratio of quartered esters and additives, in order to be diluted up to 45 times Other ingredients such as a solvent, water or any ingredient that could be part of the final formulation

Depending on the intended use, the Compositions according to the invention comprise, in addition to the mentioned compounds, additive and auxiliary agents that are usual and specific in each case, selected from electrolytes, perfumes, perfume vehicles, dyes, agents hydrotropes, antifoaming agents, other thickening agents, opacifiers, preservatives, anticorrosive agents, agents concomitant surfactants and solvents.

In a second aspect of the invention, the composition may consist only of water, of one or more esters  quates of the formula (I) and of a metal salt, whose composition is free of alkali metal salts or alkaline earth or metal salts of Phthalocyanine The metal salt is preferably ZnSO4, ZnCl2, AlCl3 or Al 2 (SO 4) 3.

The compositions according to the invention are notable for good storage stability and can be use as they are as fabric softening agents or can be dilute further with water or at around temperature ambient or mediating heating.

Examples

All of the following compositions based on the Formula (II) have been prepared as follows:

I

water was heated to 85 ° C,

II

a variable proportion of a solution was added to the 50% of the indicated salt, and stirred for about 5 minutes with approximately 150 rpm (revolutions per minute),

III

the esters cuates were added (active content 5% referred to the final composition)

IV

it cooled by stirring over the course of 30 minutes

The four esters that were used in all Examples were a mixture of the following compounds:

16-24% of a compound of the formula

3

58-64% of a compound of the formula

4

16-24% of a compound of the formula

5

Examples

For compositions based on esters cuates de ASD (formula II):

6

For compositions based on esters cuates de MDEA (formula III):

I.

water was heated to 45 ° C

II.

the ester esters were added at 50 ° C

III.

cooled by stirring approximately 150 rpm during 20 minutes.

IV.

cooled rapidly with stirring for 10 minutes

V.

a variable proportion of a solution was added to the 50% of the indicated salt and stirred for approximately 5 minutes with approximately 150 rpm.

7

The stability profile of the formulations is monitored during storage at 45 ° C. Stability profile against hydrolysis it was analyzed depending on the proportion of the mono-, di- and tri-esters analyzed each time. In the case of Four esters of MDEA, only the proportion of mono- and di-esters cuates. When hydrolysis develops, the proportion of the monoester increases while the proportion of the diester decreases for both TEA and MDEA ester esters. Without however for the TEA ester esters there is also a decrease of the proportion of the trimester. After a certain period of time, the proportion of the monoester is higher than the proportion of the diester for both types of esters cuates, of TEA and MDEA, and for the TEA ester esters the triester is presented in low levels. The crossing point of the di- and mono-ester curves is defined as the reference for a comparison between formulations The later the crossing point, the lower the hydrolysis rate and, consequently, more stable is the formulation.

The results given above show that the addition of ZnCl2 or AlCl3 further displaces the point of crossover compared to the same formulation, which does not contain no salt This indicates the positive effect on stability. against the hydrolysis of these salts.

Claims (11)

1. Aqueous compositions that are composed of a cuat ester or mixtures of ester esters of the formula (I)

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8

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in which R is alkyl of C 1 -C 4, preferably methyl, X has the same meaning that R or X is a group of the formula -C 2 H 4 OR 2, R 1 and R 2 are independently hydrogen or a group -COR 3, R 3 is alkyl of C_ {7} -C_ {21} or alkenyl of C 7 -C 21 and A is an anion, preferably that of chloride or methosulfate, a metal salt and optionally one or more auxiliary agents selected from the set consisting in electrolytes, perfumes, perfume vehicles, dyes, hydrotropic agents, antifoaming agents, thickening agents, opacifiers, preservatives and anticorrosive agents, agents concomitant surfactants and solvents, whose composition is free of metal or alkaline earth salts, of complex compounds of metals and phthalocyanine and metal salts from Phthalocyanine 2. Aqueous compositions as claimed in claim 1, wherein the four esters have the formula

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9

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in which R, R 1, R 2, R3 and A are as defined in claim one. 3. Aqueous compositions as claimed in claim 1, wherein the four esters have the formula

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10

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wherein R, R 1, R 3 and A are as defined in the claim one. 4. A composition as claimed in the claim 2, wherein the four esters have the formula II and consist of 10-38% of the monoester, of 46-63% of the diester and 7-25% of the Triester 5. A composition as claimed in the claim 3, wherein the four esters have the formula III and consist of 1-70% by weight of the monoester and 30-99% by weight of the diester. 6. A composition as claimed in the claim 1, wherein the total proportion of esters cuates of formula II or formula III is 0.5 to 30% by weight. 7. A composition as claimed in the claim 1, containing ZnCl2, AlCl3, ZnSO4 or Al 2 (SO 4) 3 as metal salt. 8. A composition as claimed in the claim 1, containing from 0.002 to 10% by weight of the salt metallic 9. A composition as claimed in the claim 1, containing one or more additives or agents auxiliary 10. A composition that consists of water, of one or more four esters of formula I as defined in the claim 1 and a metal salt, the composition of which is exempt from alkali metal or alkaline earth metal salts, or of metal salts of phthalocyanine. 11. A composition as claimed in the claim 1, which is a pre-concentrated mixture of the esters cuates and a metal salt.