CH675251A5 - - Google Patents

Description

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description

The invention relates to a composition for treating and cleaning textiles. This composition contains a non-ionic liquid surfactant, an inorganic peroxygen compound as a bleaching agent and a liquid organic bleach activating compound, also called a bleach activator.

The composition according to the invention is suitable for treating textiles. The compositions are resistant to phase separation and gelling and are easy to pour.

Liquid non-aqueous heavy-duty detergents are well known. Compositions of this type may contain, for example, a liquid nonionic surfactant in which builder particles are dispersed (e.g. U.S. Patents 4,316,812, 3,630,929 and 4,264,466, and British Patents 1,205,711,1 270,040 and 1,600 981).

From the applicant's relevant applications, USSN 717 726 describes a liquid non-ionic textile detergent composition containing a perborate bleach, a bleach activator and hydroxylamine sulfate as a bleach stabilizer, in particular as a stabilizer for catalase, an enzyme present in natural body dirt, which is hydrogen peroxide, the active bleaching component of the Peroxide bleach, quickly decomposes.

USSN 597 793 describes a non-aqueous liquid detergent composition with non-ionic surfactant which contains a suspension of a builder salt and an acid-terminated nonionic surfactant (e.g. the reaction product of a nonionic surfactant with succinic anhydride) to improve the dispersibility of the composition in an automatic washing machine.

USSN 687 815 describes a non-aqueous liquid detergent composition with non-ionic surfactant which has a builder salt suspension and contains an alkylene glycol monoalkyl ether as viscosity and gel-controlling agent in order to improve the dispersibility of the composition in an automatic washing machine.

USSN 597 948 describes a non-aqueous liquid detergent composition with non-ionic surfactant, and contains a suspension of a polyphosphate builder salt containing an alkanolphosphoric acid to improve the stability of the suspension against settling during storage.

These patent applications are directed to liquid non-aqueous non-ionic laundry detergent compositions.

Liquid detergents are often considered to be more convenient to use than dry powder or particulate products, which is why they have gained considerable favor with consumers. They are easy to measure, dissolve quickly in water, can easily be applied in concentrated solutions or dispersions to soiled areas on the collar to be washed, do not dust and usually take up less storage space. In addition, liquid detergents can be incorporated with materials that would not be able to withstand dry processes without decomposition, but which are often desirable for the production of particulate detergent products. Although they have numerous advantages over "unitary" or particulate solid products, liquid detergents also often have certain disadvantages which must be eliminated when producing economically acceptable products. Some of these products separate during storage, others during cooling and are not easily redispersible. In some cases the product viscosity changes, the product either becomes too thick to cast or so thin that it appears watery. Some clear products become cloudy, others gel when standing.

The applicant has dealt with the behavior of non-ionic liquid surfactant systems with particulate substance suspended therein. There was particular interest in non-aqueous builder-containing liquid textile detergents, including the problem of the suspended builder settling and other detergent additives, and the gel problem that plays a role in nonionic surfactants. These phenomena influence, for example, the stability, pourability and dispersibility of the product.

As is known, one of the main problems of builder-containing liquid textile detergents is their physical stability. The cause of this problem is that the density of the solid particles dispersed in the nonionic liquid surfactant is greater than the density of the liquid surfactant.

Therefore the dispersed particles tend to settle. There are basically two ways to solve this settling problem: increasing the viscosity of the liquid nonionic surfactant and reducing the particle size of the dispersed solids.

It is known that suspensions can be stabilized against settling by adding inorganic or organic thickeners or dispersing agents, for example with inorganic materials with a very large surface area, e.g. finely divided silicon dioxide, clays, etc., or with organic thickeners such as cellulose ethers, acrylic and acrylamide polymers, polyelectrolytes etc. Such increases in suspension viscosity are naturally limited by the fact that the liquid suspension must be easily pourable and flowable even at low temperature. In addition, these additives do not contribute to the cleaning effect of the formulation.

Milling to reduce particle size offers the following advantages:

1. The specific surface area of the dispersed particles is increased, and therefore

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particle wetting by the non-aqueous carrier (the liquid nonionic surfactant) is improved accordingly.

2. The average distance between the dispersed particles decreases with a corresponding increase in the particle-particle interaction. Each of these effects contributes to increasing the residual gel strength and the yield stress of the suspension, while the grinding significantly reduces the plastic viscosity.

The yield stress is defined as the minimum stress required to trigger plastic deformation (flow) of the suspension. If you look at the suspension as a loose network of dispersed particles, it behaves like an elastic gel and there is no plastic flow if the applied stress is lower than the yield stress. Once the yield stress is overcome, the network breaks at some points and the sample begins to flow, but with a very high apparent viscosity. If the shear stress is much greater than the yield stress, the pigments (or the like) are partially "shear deflocculated" and the apparent viscosity drops. Finally, when the shear stress is much higher than the yield stress value, the dispersed particles are completely shear deflocculated and the apparent viscosity is very low, as if there were no particle interaction.

Therefore, the higher the yield stress of the suspension, the higher the apparent viscosity at a low shear rate, and the better the physical stability against product settling.

In addition to the problem of settling or phase separation, the non-aqueous liquid laundry detergents based on non-ionic surfactants have the disadvantage that the non-ionic surfactants tend to gel when added to cold water. This is a particularly serious problem in the ordinary use of European household washing machines, in which the consumer places the detergent in a distribution compartment, e.g. there is a distributor drawer of the machine. When the machine is operating, the detergent in the manifold is exposed to a stream of cold water which carries it to the bulk of the wash solution. Especially in the winter months, when the detergent and the water added to the distributor are particularly cold, the detergent viscosity increases noticeably and a gel forms. As a result, some of the detergent is not completely rinsed out of the manifold when the machine is operating and a detergent deposit builds up with repeated washings, which may force the consumer to rinse the manifold with hot water.

The gel phenomenon can also be a problem whenever you want to wash with cold water, which is recommended for certain synthetic and delicate fabrics, or for fabrics that can melt in warm or hot water.

The tendency of concentrated detergent compositions to gel during storage is increased by storing them in unheated warehouses or shipping them in unheated transport rooms in the winter months.

Partial solutions to the gel problem have already been proposed, for example by diluting the liquid nonionic surfactant with certain viscosity-controlling solvents and gel-preventing substances, for example with lower alcohols such as ethyl alcohol (US Pat. No. 3,953,380), alkali formates and adipates (US Pat. PS 4 368 147), hexylene glycol, polyethylene glycol etc. as well as by modification and optimization of the non-ionic structure. A particularly successful example of the modification is the acidification of the hydroxyl-bearing end group of the non-ionic molecule. The benefits of introducing a carboxylic acid at the end of the non-ionic compound include gel prevention when diluted; Lowering the pour point; and the formation of an anionic surfactant upon neutralization in the washing medium. The optimization of the nonionic surfactant structure has focused on the chain length of the hydrophobic-lipophilic part and the number and makeup or attachment of the alkylene oxide (e.g. ethylene oxide) units of the hydrophilic part. For example, it has been found that a Ci3 fatty alcohol ethoxylated with 8 moles of ethylene oxide has only a limited tendency to gel.

There is a need for non-aqueous liquid fabric treating agents which contain a bleach and a bleach activator and which are improved in bleaching properties, stability and gel prevention. The present invention now relates to a composition for treating and cleaning textiles, which is characterized by a content of a nonionic liquid surfactant, an inorganic peroxygen compound as a bleaching agent and a liquid organic bleach activating compound, also called a bleach activator.

The composition according to the invention is in a highly concentrated, stable non-aqueous liquid form. In the composition mentioned, sodium perborate monohydrate is a preferred persalting agent and a preferred liquid organic bleach activator is ethylene benzoate acetate. The liquid organic bleach activator compound is used to replace the commonly used solid bleach activators such as tetraacetylethylene diamine (TAED) and thus to reduce the solids content of the concentrated detergent composition and to improve the pourability and dispersibility of the composition.

The system of persalt bleach and or3 contained in the composition according to the invention

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Ganic liquid bleach activator can be used in builder containing detergent compositions with phosphate and low phosphate content.

An acid-terminated nonionic surfactant can be added to improve the viscosity properties of the composition. In order to further improve the viscosity and storage properties of the composition, it is possible to add viscosity-improving and gel-preventing agents such as alkylene glycol monoalkyl ether and anti-settling agents such as alkanol phosphoric acid esters. According to a preferred embodiment of the invention, the detergent composition contains sodium perborate monohydrate as a bleaching agent, ethylidene benzoate acetate as a bleach activator, an acid-terminated nonionic surfactant, an alkylene glycol monoalkyl ether and an alkanol ester of phosphoric acid as a sediment-preventing stabilizing agent.

The commonly used peroxygen bleaches, e.g. Sodium perborate, percarbonate, perphosphate and persulfate can be used as bleaching agents.

According to one embodiment of the invention, the builder constituents of the composition can be ground to a particle size of less than 100, for example less than 40 and particularly preferably less than 10 micrometers, in order to further improve the stability of the suspension of the builder constituents in the liquid nonionic surfactant.

In addition, other ingredients can be added, such as anti-scale substances, sequestering agents, anti-foaming agents, optical brighteners, enzymes, anti-repeating agents, perfume and dyes.

In one aspect the invention relates to a heavy duty liquid laundry detergent comprising a suspension of a peroxygen bleach and a builder salt, e.g. Phosphate builder salt, in a liquid nonionic surfactant and as a bleach activator, an effective amount of a liquid organic bleach activator, e.g. Ethylidene benzoate acetate.

In another aspect, the invention relates to a concentrated liquid heavy-duty laundry detergent with good bleaching properties at low temperature, which is stable, does not settle when stored and does not gel during storage or use. The liquid compositions of the invention are easy to pour, easy to measure, easy to put in the washing machine and to disperse in water.

The composition according to the invention can be used in and / or with cold water without gelling occurring. A container is filled with a non-aqueous liquid textile detergent, the cleaning component of which is at least predominantly a liquid nonionic surfactant. The detergent can be dispensed from the container into an aqueous wash bath by means of a stream of unheated water directed at and carrying the detergent into the wash bath.

Advantages of the invention are:

The use of the liquid organic bleach activator instead of solid bleach activator reduces the settling of the dispersed particles in the composition and improves the pourability of the detergent.

The use of a liquid organic bleach activator in place of the known solid activators such as TAED reduces the total solids content in the composition and makes the bleach activator available in a disperse liquid form in which it can react more easily with the persalt compound (bleach).

The concentrated non-aqueous liquid textile detergents with non-ionic surfactant according to the invention are stable, they neither settle nor gel when stored. The liquid compositions are easy to pour, easy to measure, easy to put into the washing machine and easy to disperse in water.

It is an object of the invention to provide a stable liquid non-aqueous non-ionic heavy-duty detergent composition which contains a persalt bleach and a liquid organic bleach activator, at least one viscosity-controlling and gel-preventing agent, a settling-preventing stabilizer and a phosphate as anionic builder salt suspended in a nonionic surfactant .

Another object is to provide liquid textile treatment agents with good bleaching properties at low temperatures, which are suspensions of insoluble inorganic particles in a non-aqueous liquid and are stable in storage, easy to pour and dispersible in cold, warm or hot water.

The composition according to the invention with non-ionic surfactant is pourable at all temperatures and it can easily be dispensed repeatedly from the dispenser compartment of washing machines of a European design without the dispenser compartment becoming blocked or soiled, not even during the winter months.

A particular object of the invention is to provide non-gelling, stable suspensions of builder-containing, non-aqueous, liquid, non-ionic heavy duty fabric detergent compositions containing a persalt bleach and an effective amount of a liquid organic bleach actuator compound.

To accomplish these and other tasks that emerge from the following description of preferred modes of training, a detergent composition is generally proposed that includes a

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contains non-aqueous liquid nonionic surfactant, a persalt as bleaching agent and a liquid organic compound as persalt bleaching agent activator as well as preferably also inorganic and organic fabric treatment additives, e.g. viscosity-improving substances and one or more gel-preventing substances, incrustation-preventing substances, pH value-controlling substances, foam-preventing substances, optical brighteners, enzymes, re-precipitation-preventing substances, perfume, dyes and coloring pigments.

The non-aqueous liquid non-ionic laundry detergent compositions of the invention contain a persalt bleach and a liquid organic bleach activator as essential components of the composition.

The persalt compounds used as bleaching agents are well known. They are solids that are usually dispersed in the nonionic surfactant and dissolve easily when the detergent is added to the aqueous washing medium. The persalt compounds or oxygen bleaching agents are per-compounds which release hydrogen peroxide in aqueous solution. Preferred examples are sodium and potassium perborates, percarbonates and perphosphates and potassium monopersulfate. The perborates, especially sodium perborate monohydrate, are particularly preferred.

Hydrogen peroxide and the starting compounds that release hydrogen peroxide are good oxidizing agents for removing stains from textiles, especially stains from wine, tea, coffee, cocoa, fruits etc. Hydrogen peroxide and its precursors or starting compounds bleach at relatively high temperatures, e.g. about 80 to 100 ° C, generally quick and effective.

In order to be able to take advantage of the detergents effective at low temperatures and the washing programs working at low temperatures which are generally used today for temperature-sensitive textiles, the persalt or the peroxygen compound used as bleaching agent is used in a mixture with a bleach activator.

Solid bleach activators such as tetraacetylethylene diamine (TAED) have been used to date. The use of the solid activators increased the solids content of the particles dispersed in the nonionic detergent surfactant and required the solid bleach activators to be dissolved in the aqueous bath liquid before the activators were able to react with the persalt compound.

In the composition according to the invention, clear, fluid, liquid organic bleach activators are used to activate the persalt bleach. Firstly, since the organic bleach activators are liquid, they can easily be dispersed in the nonionic liquid surfactant or detergent, and secondly they react more quickly with the persalt bleaches in the aqueous washing medium. The addition of the liquid organic detergent activators can reduce the effective temperature of the peroxide bleach to low temperatures, for example 30 to 40 ° C.

The preferred organic liquid bleach activator compounds have the general formula

O

II

° -c-r2

o-c-r,

II 3

O

wherein Ri, R2 and R3 are hydrocarbon residues. Ri, R2 and R3 can each independently be Cr to C12 alkyl, e.g. Ci to C4 alkyl such as C1 to C2 alkyl; an aromatic group such as phenyl and a lower alkyl substituted aromatic group such as C1 to C3 substituted phenyl; C4- to C6-heterocyclic radicals in which the heteroatom is oxygen, nitrogen or sulfur, such as furan, tetrahydrofuran, thiophene, tetrahydrothiophene, oxazine, pyridine, pyrrolidine and pyrolidone.

In the preferred embodiment, R 1 is C 1 -C 4 -alkyl, preferably CH 3; R2 C1 to C4 alkyl, preferably CH3; and R3 phenyl and phenyl substituted with 1 to 3 methyl groups, preferably phenyl, or heptanoyl or heptanyl, ethylidene heptanoate acetate, ethylidene octanoate acetate and ethyl dendodecanoate, or ethylidene heptanoate acetate, ethylidene octanoate acetate and ethylidene dodecanoate acetate are preferred. Any form of training (perform) is good, but the heptane oat is best, probably because the hydrophilic-lipophilic balance is suitable to enable adsorption on the fabric and yet it remains sufficiently hydrophilic to react with hydrogen peroxide.

The preferred organic liquid bleach activator is ethylidene benzoate acetate, a clear fluid liquid that is readily available commercially.

Only small amounts of the liquid organic bleach activator, e.g. Ethylidene benzoate acetate, required to activate the peroxygen bleach compound. For example, be

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based on the total weight of the liquid nonionic surfactant composition, appropriate amounts of ethyldenobenzoate acetate in the range of about 1 to about 15, preferably about 1 to about 8.0, and most preferably about 2 to 6%.

The bleach activator usually interacts with the peroxygen compound to form a bleaching peroxyacid agent in the wash water. It is preferred to incorporate a sequestering agent with high complexation capacity to prevent any undesirable reaction between such peroxyacid and hydrogen peroxide in the wash solution in the presence of metal ions.

Suitable sequestering agents for this purpose include the sodium salts of nitrilotriacetic acid (NTA), ethylenediaminetetraacetic acid (EDTA), diethylenetriaminepentaacetic acid (DETPA), diethylenetriaminepentamethylenephosphonic acid (DTPMP), sold under the name Dequest 2066, and ethylenediamine acid (EDITPA) phosphate (EDIT) PAA. The sequestering agents can be used alone or in a mixture.

To prevent loss of peroxide bleach e.g. To prevent sodium perborate, by enzyme-induced decomposition, e.g. by catalase enzyme, the compositions may optionally contain an enzyme inhibiting compound, i.e. a compound capable of inhibiting enzyme-induced decomposition of the peroxide bleach. Suitable inhibitor compounds are disclosed in U.S. Patent 3,606,990.

Hydroxylamine sulfate and other water-soluble hydroxylamine salts are mentioned as particularly interesting inhibitor compounds. According to one embodiment of the non-aqueous compositions of the invention, suitable amounts of hydroxyamine salt inhibitors are small and are about 0.01 to 0.4%. In general, however, suitable amounts of enzyme inhibitors are up to about 15, for example 0.1 to 10% by weight of the composition.

Stabilizers can also be added to the formulation, for example an acidic organic phosphorus compound with an acidic -POH group, such as a partial ester of phosphoric acid or phosphorous acid and an alkanol.

The nonionic surfactants can contain polyphosphate builder salts or have a low content of polyphosphates.

The nonionic surfactants used to practice the invention can be selected from a wide variety of known compounds.

As is known, the nonionic surfactants are distinguished by the presence of an organic hydrophobic group and an organic hydrophilic group; mostly they are made by condensing an organic aliphatic or alkyl aromatic hydrophobic compound with ethylene oxide, which is hydrophilic in nature. Practically any hydrophobic compound which has a car-boxy, hydroxyl, amido or amino group with a free hydrogen on nitrogen can be condensed with ethylene oxide or its polyhydration product, polyethylene glycol, to form a non-ionic surfactant. The length of the hydrophilic or polyoxyethylene chain can be easily adjusted in order to achieve the desired balance between the hydrophobic and the hydrophilic groups. Typical suitable nonionic surfactants are described in U.S. Patents 4,316,812 and 3,630,929.

Most of the non-ionic surfactants with lower alkoxy are polyalkoxylated lipophiles (poly (lower) alkoxylated lipophiles), in which the hydrophilic-lipophilic balance is obtained by adding a hydrophilic poly (lower) alkoxy group to a lipophilic residue. A preferred class of nonionic surfactants are the po! Y (lower) alkoxylated higher alkanols, in which the alkanol has 9 to 18 carbon atoms and the number of lower alkylene oxide (with 2 or 3 carbon atoms) groups is 3 to 12. Of these materials, the use of those in which the higher alkanol is a higher fatty alcohol having 9 to 11 or 12 to 15 carbon atoms and which contain 5 to 8 or 5 to 9 lower alkoxy groups per mole is preferred. Preferably the lower alkoxy is ethoxy, but in some cases it may be desirably mixed with propoxy, the latter often being less (less than 50%) when present.

Examples of such compounds are C12 to cis alkanols with 7 ethylene oxide groups per mole, e.g. Neodol 25-7 and Neodol 23-6.5 from Shell Chemical Company, Inc. The former is a condensation product of a mixture of higher fatty alcohols averaging about 12 to 15 carbon atoms with about 7 moles of ethylene oxide, the latter is a corresponding mixture, the carbon atom content being the higher Fatty alcohol is 12 to 13 and the number of ethylene oxide groups is about 6.5 on average. The higher alcohols are primary alkanols.

Other examples of such surfactants are Tergitol 15-S-7 and Tergitol 15-S-9, both linear secondary alcohol ethoxylates from Union Carbide Corp. The former is a mixed ethoxylation product of a linear secondary C11 to cis alkanol with 7 moles of ethylene oxide, the latter is a similar product in which 9 moles of ethylene oxide have been reacted.

In the composition according to the invention, nonionic surfactants with a higher molecular weight can also be used as neodol 45-11, which are similar ethylene oxide condensation products of higher fatty alcohols (14 to 15 carbon atoms) and the number of ethylene oxide groups per mole is approximately 11. These products are also from Shell Chemical Company.

Other preferred nonionic surfactants are represented by the Plurafacs. The Plurafacs

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are the reaction product of a higher linear alcohol and a mixture of ethylene and propylene oxides. they have a mixed ethylene oxide and propylene oxide chain, at the end of which there is a hydroxyl group. Examples of this are product A (a C13 to cis fatty alcohol condensed with

6 moles of ethylene oxide and 3 moles of propylene oxide), product B (a C13 to cis fatty alcohol, condensed with

7 moles of propylene oxide and 4 moles of ethylene oxide), Product C (a C13 to cis fatty alcohol condensed with 5 moles of propylene oxide and 10 moles of ethylene oxide), and Product D (a 1: 1 mixture of Product C and Product B).

Another group of Shell Chemical Company, Inc. is commercially available under the name Dobanol: Dobanol 91-5 is an ethoxylated Cg to Cu fatty alcohol with an average of 5 moles of ethylene oxide, Dobanol 25-7 is an ethoxylated C12 to Cis Fatty alcohol with an average of 7 moles of ethylene oxide per mole of fatty alcohol.

In the preferred poly (lower) alkoxylated higher alkanols, the number of lower alkoxy groups to achieve the best balance between hydrophilic and lipophilic portions is usually 40 to 100, preferably 40 to 60% of the number of carbon atoms in the higher alkanol, but this is not -ionic surfactant preferably contains at least 50% of these preferred higher alkanols polyalkoxylated with lower alkoxy. Higher molecular weight alkanols as well as various other normally solid non-ionic surfactants and surfactants can contribute to the gelation of the liquid surfactant and are therefore preferably omitted or limited in amount in the compositions of the invention, although small proportions thereof can be used because of their cleaning properties, etc. . In both the preferred and less preferred nonionic surfactants, the alkyl groups present are generally said to be linear, although branching may be tolerable, for example on a carbon atom adjacent to the straight chain terminal carbon atom or removing or removing two carbon atoms ) of the ethoxy chain if such branched alkyl is not more than 3 carbon atoms long. In general, the proportion of carbon atoms in such a branched configuration rarely exceeds 20% of the total carbon atom content of the alkyl. In the same way, although linear alkyls which are terminally linked to the ethylene oxide chains are highly preferred and apparently give the best combination of detergency, biodegradability and freedom from gels, medium or secondary linkage with the ethylene oxide can occur in the chain. The proportion of these alkyls is normally only small, generally less than about 20%, but, as with the tergitols, can be larger. Propylene oxide, if present in the lower alkylene oxide chain, also usually makes up less than 20%, preferably less than 10% thereof.

In the presence of larger amounts of non-terminally alkoxylated alkanols, propylene oxide-containing poly (lower) alkoxylated alkanols and less hydrophilic-lipophilic balanced non-ionic surfactant than mentioned above, and if other nonionic surfactants are used instead of the ones preferred here, the resulting product may be less good for cleaning. Have stability, viscosity and non-gelling properties than the preferred compositions, but use of the viscosity and gel control compounds of the invention can also improve the properties of detergents based on such surfactants. In some cases, for example, when poly-lower alkoxylated higher alkanol is used, which is often the case because of its cleaning power, the amount thereof is determined or limited according to the results of routine experiments to the desired washing power and yet a non-gelling one Obtain product of desired viscosity. It has also been found that it is hardly necessary to use the higher molecular weight nonionic surfactants because of their detergency, since the preferred nonionic surfactants described here are excellent cleaning agents and, moreover, make it possible to achieve the desired viscosity in the liquid detergent without gelling at low temperatures .

Another useful group of nonionic surfactants is that of the Surfacant T series from British Petroleum. The non-ionic surfactant T surfactants are obtained by ethoxylating secondary C13 fatty alcohols with a narrow ethylene oxide distribution. The Surfactant T5 has an average of 5 moles of ethylene oxide, Surfactant T7 an average of 7 moles of ethylene oxide, Surfactant T9 an average of 9 moles of ethylene oxide and Surfactant T12 an average of 12 moles of ethylene oxide per mole of secondary Ci3 fatty alcohol.

Preferred nonionic surfactants in the compositions of the invention include the secondary C12 to Ci5 fatty alcohols with relatively narrow levels of ethylene oxide in the range of about 7 to 9 moles, and the Cg to Cn fatty alcohols ethoxylated with about 5 to 6 moles of ethylene oxide.

Mixtures of two or more of the liquid nonionic surfactants can be used, which is advantageous in some cases.

The viscosity and gel properties of the liquid detergents can be improved by incorporating an effective amount of a non-ionic surfactant with a terminal acid group. The acid group nonionic surfactants are modified nonionic surfactants in which a free hydroxyl group is converted to a group with a free carboxyl group, e.g. an ester or partial ester of a nonionic surfactant with a polycarboxylic acid or anhydride.

As described in USSN 597 948, the knowledge of which is assumed here, the non-ionic surfactants modified to form a free carboxyl group, which can be characterized broadly as polyether carboxylic acids, bring about a lowering of the temperature at which the liquid non-ionic surfactant co-operates Water forms a gel.

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The addition of the acid-terminated nonionic surfactants to the liquid nonionic surfactant aids the dispensability or spreadability of the composition, i.e. pourability, and lowers the temperature at which the liquid nonionic surfactants gel in water without reducing their stability against settling. The acid-terminated non-ionic surfactant reacts in the wash water with the alkaline parts (alkalinity) of the dispersed builder salt phase of the detergent composition and acts effectively as an anionic surfactant.

Specific examples include the half esters of product A with succinic anhydride, the esters or half esters of Dobanol 25-7 with succinic anhydride, and the esters or half esters of Dobanol 91-5 with succinic anhydride. Instead of succinic anhydride, other polycarboxylic acids or anhydrides can be used, e.g. Maleic acid, maleic anhydride, glutaric acid, malonic acid, phthalic acid, phthalic anhydride, citric acid and the like.

The acid-terminated nonionic surfactants can be prepared as follows:

Acid-determined product A: 400 g of the non-ionic surfactant product A, an alkoxylated C13 to Ci5 alkanoI with 6 ethylene oxide and 3 propylene oxide units per alkanol, are mixed with 32 g of succinic anhydride and heated at 100 ° C for 7 hours. The mixture is cooled and filtered to remove unreacted succinic acid material. Infrared analysis indicates that about half of the nonionic surfactant has been converted into its acid half ester.

Acid-determined Dobanol 25-7. 522 g Dobanol 25-7, a non-ionic surfactant, which is the ethoxylation product of a C12 to Cis alkanol with about 7 ethylene oxide units per mole of alkanol, are mixed with 100 g of succinic anhydride and 0.1 g of pyridine (which acts as an esterification catalyst) and heated to 260 ° C for 2 hours, cooled and filtered to remove unreacted succinic material. Infrared analysis shows that essentially all free hydroxyl groups of the surfactant are converted.

Acid-determined Dobanol 91-5.1000 g Dobanol 91-5, a non-ionic surfactant, which is the ethoxylation product of a C9 to Cu alkanol with about 5 ethylene oxide units per molecule of alkanol, is mixed with 265 g of succinic anhydride and 0.1 g of pyridine catalyst and 2 Heated to 260 ° C for hours, cooled and filtered to remove unreacted succinic acid material. Infrared analysis indicates that essentially all free hydroxyls of the surfactant have been converted.

Instead of or in a mixture with the pyridine, other esterification catalysts can be used, e.g. an alkali alkoxide (e.g. sodium methoxide).

The acidic polyether compound, i.e. the acid-terminated non-ionic surfactant is preferably added in solution in the non-ionic surfactant.

The liquid, non-aqueous, non-ionic surfactant used in the compositions of the invention generally contains dispersed and suspended fine particles of inorganic and / or organic surfactant builder.

The detergents according to the invention preferably contain water-soluble and / or water-insoluble builder salts. Water-soluble alkaline builder salts that can be used alone with the surfactant or in a mixture with other builders are alkali carbonates, bicarbonates, borates, phosphates, poly-phosphates and silicates. (Ammonium or substituted ammonium salts can also be used.) Specific examples of such salts are sodium tripolyphosphate, sodium carbonate, sodium tetraborate, sodium pyrophosphate, potassium pyrophosphate, sodium bicarbonate, potassium tripolyphosphate, sodium hexametaphosphate, sodium sesquicarbonate, sodium mono- and diorthophosphate as well as potassium biophosphate and potassium biophosphate. Sodium tripolyphosphate (TPP) is particularly preferred.

Since the compositions of the invention are generally highly concentrated and therefore can be used in relatively low dosages, it is desirable to supplement any phosphate builder (such as sodium tripolyphosphate) with an auxiliary builder such as a poly (low) carboxylic acid or a polymeric carboxylic acid with high calcium binding capacity to incrust to avoid that could otherwise be caused by the formation of an insoluble calcium phosphate.

Suitable lower polycarboxylic acids include aicalis salts of lower polycarboxylic acids, for example the sodium and potassium salts. Suitable lower polycarboxylic acids have 2 to 4 carboxylic acid groups. The preferred sodium and potassium salts of lower polycarboxylic acids are the citric acid and tartaric acid salts.

The sodium citric acid salts are most preferred, especially the trisodium citrate. The monosodium and disodium citrates can also be used, as can the monosodium and disodium tartaric acid salts. The alkali salts of lower polycarboxylic acids are particularly good builder salts; Because of their high calcium and magnesium binding capacity, they prevent incrustations that could otherwise occur due to the formation of insoluble calcium and magnesium salts.

To produce a phosphate-free detergent composition, the polyphosphates can be replaced entirely by one or more auxiliary builder salts. Other organic builders are polymers and copolymers of polyacrylic acid and polymaleic anhydride and their alkali metal salts. In particular, such builders consist of a copolymer which is the reaction product of approximately equal amounts of methacrylic acid and maleic anhydride and which is completely neutralized to form the sodium salt. The builder is commercially available under the name Sokalan CP5. This builder prevents incrustation even in small amounts.

Examples of alkaline, organic sequestering builder salts with the tenside builder salts

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or can be used in admixture with other organic and inorganic builders, the alkali, ammonium or substituted ammonium aminopolycarboxylates, e.g. Sodium and potassium ethylenediaminetetraacetate (EDTA), sodium and potassium nitrilotriacetate (NTA) and triethanolammonium N- (2-hydroxyethyl) nitrilodiacetate. Mixed salts of these aminopolycarboxylates are also suitable.

Other suitable organic builders or auxiliary builders are, for example, carboxymethyl succinates, tartronates and glycolates. The polyacetal carboxylates are of particular value. The polyacetal carboxylates and their use in detergents are described in USSN 767 570 and in U.S. Patents 4,144,226, 4,315,092 and 4,146,495.

The alkali silicates, which also act in that they adjust or control the pH and make the composition anticorrosive to parts of the washing machine, are valuable builder salts. Sodium silicates with Na20 / SiC> 2 ratios of 1.6 / 1 to 1 / 3.2, particularly 1/2 to 1 / 2.8, are preferred. Potassium silicates of the same proportions can be used.

Other typical suitable builders include, for example, those described in U.S. Patents 4,316,812, 4,264,466 and 3,630,929. The inorganic builder salts can be used with the nonionic surfactant or in a mixture with other inorganic builder salts or with organic builder salts.

Water-insoluble crystalline and amorphous aluminum silicate zeolites can be used. The zeolites generally have the formula

(M20) X- (Al203) y- (Si02) z-WH20,

wherein x is 1, y is 0.8 to 1.2 and preferably 1, z is 1.5 to 3.5 or more and preferably 2 to 3, w is 0 to 9, preferably 2.5 to 6 and M is preferably sodium. A typical zeolite is of type A or a similar structure, with type 4A being particularly preferred. The preferred aluminum minosilicates have calcium ion exchange capacities of about 200 milliequivalents per gram or more, e.g. 400 meq / 1 g.

Various crystalline zeolites (i.e., aluminosilicates) that can be used are described in British Patent 1,504,168, U.S. Patent No. 4,409,136 and Canadian Patents 1,072,835 and 1,087,477, incorporated herein by reference. An example of amorphous zeolites which can be used according to the invention is given in Belgian PS 835 351, the knowledge of which is likewise assumed here.

Other materials such as clays, especially the water-insoluble ones, can be used as additives for the detergents of the invention. Bentonite is particularly useful. This material is mainly montmorillonite, a hydrated aluminum silicate in which about 1/6 of the aluminum atoms are replaced by magnesium atoms and with which different amounts of hydrogen, sodium, potassium, calcium, etc. can be loosely combined. In its form suitable for detergents (i.e. free of gravel, sand etc.) it contains at least 50% montmorillonite. Its cation exchange capacity is therefore at least about 50 to 75 meq per 100 g of bentonite. Particularly preferred bentonites are the Wyoming or Western US bentonites sold by Georgia Kaolin Co. as Thixo-Jels 1, 2, 3 and 4. These bentonites are known as textile softeners (GB-PSen 401 413 and 461 221).

The storage properties of the composition can be significantly improved by incorporating an effective amount of low molecular weight amphiphilic compounds which act on the nonionic surfactant to control viscosity and prevent gel. The viscosity-controlling and gel-preventing compounds lower the temperature at which the non-ionic surfactant forms a gel when added to water. Such viscosity-controlling and gel-preventing substances can be, for example, low molecular weight alkylene oxide mono (lower) alkyl ethers, amphiphilic compounds. In terms of their chemical structure, the amphiphilic compounds can be regarded as analogous to the liquid non-ionic ethoxylated and / or propoxylated fatty alcohol surfactants, but they have relatively short hydrocarbon chain lengths (C2 to Cs) and a low content of ethylene oxide (about 2 to 6 ethylene oxide groups per molecule) .

Suitable amphiphilic compounds can be represented by the following formula

R10 (CHCH "0) H 1 n are represented, wherein R1 is a C2 to Cs alkyl group, R2 represents hydrogen or methyl and n represents a number from about 1 to 6 on average.

In particular, the compounds are (lower, i.e. C2 to C3) alkylene glycol mono (lower, i.e. C2 to Cs) alkyl ethers.

Above all, the compounds are mono-, di- or tri (lower) alkylene glycol mono (lower) alkyl ether, in which the lower alkylene comprises 2 to 3 carbon atoms and the lower alkyl 1 to 5 carbon atoms.

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Specific examples of suitable amphiphilic compounds include ethylene glycol monoethyl ether C2H5-O-CH2CH2OH, diethylene glycol monobutyl ether C4H9-0- (CH2CH20) 2H, tetraethylene glycol monobutyl ether C4H7-0- (CH2CH20) 4H and dipropylene glycol monomethyl ether

CH, -0- (CH9CH0) oH.

È

Diethylene glycol monobutyl ether is particularly preferred.

The incorporation of the low molecular weight alkylene glycol monoalkyl ethers into the detergents lowers the viscosity of the composition so that it is easier to pour, improves stability against settling and improves the dispersibility of the composition when added to warm or cold water.

The compositions of the invention have improved viscosity and stability properties and remain stable and pourable at low temperatures such as 5 ° C and below.

According to one embodiment of the invention, an alkanol phosphoric acid ester can be added as a stabilizing agent. By incorporating a small effective amount of an acidic organic phosphorus compound having an acidic -POH group, such as a partial ester of phosphoric acid or phosphorous acid and an alkanol, the stability of the composition can be improved. As described in USSN 597 948, incorporated herein by reference, the acidic organic phosphorus compound with an acidic -POH group can improve the stability of the builder suspension in the non-aqueous, liquid non-ionic surfactant. The acidic organic phosphorus compound may, for example, be a partial ester of phosphoric acid and an alcohol such as an alkanol of lipophilic character, for example having more than 5 carbon atoms, e.g. 8 to 20 carbon atoms.

A specific example is a partial ester of phosphoric acid and a C16 to cis alkanol (Empiphos 5632 from Marchon); it is prepared with about 35% monoesters and 65% diesters.

The incorporation of fairly small quantities, e.g. 0.3% by weight of the acidic organic phosphorus compound stabilizes the suspension against settling on standing, but remains pourable while, due to the low stabilizer concentration, e.g. below about 1%, their plastic viscosity generally decreases.

Other bleach activators may optionally be added to the composition, for example activators such as tetraacetylethylene diamine (TAED) and pentaacetyl glucose, acetylsalicylic acid derivatives, alkyl and alkenyl succinic anhydride, tetraacetyl glycouril (TAGU) and the derivatives thereof.

In addition to the builders, various other auxiliaries or additives can be present in the detergent product in order to achieve further functional or aesthetic properties. So you can incorporate small amounts of dirt-suspending or re-precipitation-preventing substances such as polyvinyl alcohol, fatty amides, sodium carboxymethyl cellulose, hydroxypropyl methyl cellulose in the formulation. A preferred anti-precipitation agent is sodium carboxymethyl cellulose with a CMC / MC ratio of 2: 1, which is sold as Reiatin DM 4050.

Small amounts of Duet 787, a detergent or laundry perfume from International Flavors and Frangrances Inc., Union Beach, N.J. 07735. Duet 787 can be used in amounts of 0 to 3, preferably 0.2 to 2.0, for example 0.5 to 2, e.g. 0.3 to 1.0% by weight of the composition can be added.

Optical brighteners for cotton, polyamide and polyester fabrics can be used. Suitable optical brighteners include stilbene, triazole and benzidine sulfone compositions, especially sulfonated substituted triazinyl stilbene, sulfonated naphthotriazole stilbene, benzidine sulfone, etc., with stilbene and triazole combinations being most preferred. A preferred brightener is Stilbene Brightener N4, a dimorpholinodianilinostilbenesulfonate.

Enzymes can also be added, preferably proteolytic enzymes such as subtilisin, bromelin, papain, trypsin and pepsin, and enzymes of the amylase type, lipase type and mixtures thereof. Preferred enzymes contain protease porridge, esperase porridge and amylase. A preferred enzyme is Esperse SL8, a proteolytic enzyme. Foam-preventing substances such as silicone compounds, for example Silicane L 7604, a polysiloxane, can also be added in small amounts.

Bactericides, e.g. Tetrachlorosalicylanilide and hexachlorophene, fungicides, dyes, pigments (water-dispersible), protective substances, ultraviolet absorbers, anti-yellowing substances such as sodium carboxymethyl cellulose, pH modifiers and pH buffers, color-preserving bleaching agents, perfume, dyes and bluing agents can be used such as ultramarine.

According to one embodiment of the invention, the stability of the builder salts in the composition when stored and the dispersibility of the composition in water are improved if the solid builders are ground and the particles are preferably less than 100 microns in size10

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as less than 40 microns and particularly preferably less than 10 microns crushed. Solid builders such as sodium tripolyphosphate (TPP) are generally supplied in particle sizes of about 100, 200 or 400 microns. The nonionic liquid surfactant phase can be mixed with the solid builders before or after grinding.

According to a preferred embodiment of the invention, the mixture of liquid non-ionic surfactant and solid components is placed in an attritor in which the particle sizes of the solid components are less than about 10 microns, i.e. be reduced to average particle sizes of 2 to 10 microns or less (e.g. 1 micron). Preferably less than about 10, especially less than about 5% of all suspended particles have sizes over 10 microns. Compositions whose particles are so small in size have improved stability against separation or settling on storage. The addition of the acid-terminated nonionic surfactant can reduce the yield stress of such dispersions and contribute to the dispersibility of the dispersions without correspondingly lowering the dispersion stability against settling.

It is preferred that the proportion of the solid constituents be sufficient during milling (e.g. at least about 40%, e.g. about 50%) so that the solid particles are in contact with one another and essentially not shielded from one another by the non-ionic surfactant. After the milling step, any residual liquid nonionic surfactant can be added to the milled formulation. Mills with grinding balls (ball mills) or similar mobile grinding elements have delivered good results. So you can use a batch-type laboratory attritor with steatite balls with a diameter of 8 mm. For work on a larger scale, a continuous mill can be used, in which grinding balls with a diameter of 1 mm or 1.5 mm work in a very narrow gap between a stator and rotor, which is operated at a relatively high speed (e.g. a CoBall mill ); when using such a mill, it is desirable to first pass the mixture of non-ionic surfactant and solids through a less fine mill (e.g., a colloid mill) to reduce the particle size to less than 100 microns (e.g., about 40 microns) reduce before grinding to an average particle diameter below about 10 microns in the continuous ball mill.

In the preferred heavy duty liquid laundry detergent compositions of the invention, typical amounts (percent based on the total weight of the composition, unless otherwise stated) of the ingredients are as follows: liquid non-ionic surfactant, about 10 to 60, e.g. 20 to 50, e.g. about 30 to 40 percent.

Acid-terminated non-ionic surfactant (non-ionic acid-terminated surfactant) as a viscosity improving agent, about 0 to 20, e.g. 1 to 10, e.g. about 2 to 5 percent.

Surfactant builders such as sodium tripolyphosphate (TPP), about 10 to 60, e.g. 15 to 50, e.g. about 25 to 35 percent.

Copolymer of acrylic acid and maleic anhydride, alkali salt, (e.g. Sokalan CP5) about 0 to 10, e.g. 1 to 8, e.g. about 2 to 4 percent.

Alkylene glycol monoalkyl ether as a gel preventing agent, about 5 to 30, e.g. 5 to 20, e.g. about 5 to 15 percent.

Phosphoric acid alkanol esters as stabilizing agents, 0 to 2.0 or 0.1 to 1.0, e.g. 0.2 to 0.5 percent.

Persalt as bleaching agent, about 5 to 30, e.g. 2 to 20, e.g. about 5 to 15 percent.

Liquid organic compound as a bleach activator, e.g. Ethylidene benzoate acetate, about 1 to 15, for example 1 to 8, e.g. about 2 to 6 percent.

Bleach sequestering agents, e.g. Dequest 2066, about 0 to 3.0, preferably 0.5 to 2.0, e.g. about 0.50 to 1.25 percent.

Anti-precipitation agent, e.g. Relatin DM 4050, about 0 to 4.0, preferably 0.5 to 3.0, e.g. 0.5 to 1.5 percent.

Optical brightener, about 0 to 2.0, preferably 0.05 to 1.0, e.g. 0.15 to 0.75 percent.

Enzymes, about 0 to 3.0, preferably 0.5 to 2.0, e.g. 0.75 to 1.25 percent.

Perfume, about 0 to 3.0, preferably 0.10 to 1.25, e.g. 0.25 to 1.0 percent.

Optionally, various of the additives mentioned can be added to achieve the desired effect.

The liquid organic compound serving as bleach activator is preferably used at least with a viscosity-controlling and gel-preventing agent from the group consisting of alkylene glycol monoether or acid-terminated nonionic surfactant. In some cases it can be advantageous to use both the alkylene glycol monoethers and the non-ionic surfactants with a terminal acid group.

The additives are chosen so that they are compatible with the main components of the detergent composition. As indicated above, all quantities and percentages are based on the weight of the entire formulation or composition, unless stated otherwise.

The concentrated non-aqueous non-ionic liquid detergent composition of the invention is readily dispersed in the water in the washing machine.

A typical formulation of a detergent of the invention is as follows:

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Percent by weight

Nonionic surfactant or mixture thereof

20 to 45

acid-terminated surfactant to improve viscosity

0 to 20

Phosphate as builder salt

10 to 60

anti-incrusting agent

0 to 10

Alkylene glycol monoalkyl ether as a gel-preventing agent

5 to 15

Phosphoric acid alkanol esters, stabilizers

0 to 2.0

anti-precipitation agent

0 to 4.0

Alkali perborate as bleach

5 to 15

liquid organic bleach activator compound,

1.0 to 8.0

e.g. Ethylidene benzoate acetate

Bleach sequestering agent

0 to 3.0

Perfume (Duet 787)

0 to 3.0

optical brightener

0.15 to 0.75

Enzymes

0.75 to 1.25

Perfume

0 to 3.0

The following examples are intended to illustrate the invention.

example 1

A concentrated non-aqueous liquid detergent composition with non-ionic surfactant is formulated from the following ingredients in the following amounts:

Percent by weight

Nonionic surfactant 37.0

acid-determined Dobano! 91-5, 5.0 reaction product with succinic anhydride

Sodium tripolyphosphate (TPP) 31.4

Diethylene glycol monobutyl ether, gel preventing agent 10.0

Phosphoric acid alkanol ester (Empiphos 5632) 0.3

Sodium perborate monohydrate, bleach 9.0

Ethylidene benzoate acetate form activator 4.5

anti-precipitation agent (Relatin DM 4050) (1 '1.0

optical brightener (Tinopal ATSX) 0.2

Perfume 0.6

Enzyme (Esperase) 1 ^ 0

100.0

'CMC / MC 2: 1 mixture of sodium carboxymethyl cellulose and hydroxymethyl cellulose

The formulation was milled for about 1 hour to reduce the particle size of the suspended builder salts to less than 40 microns. The formulated detergent composition is stable, does not gel when stored, is easy to redisperse in water and has good bleaching properties.

Example 2

A concentrated non-aqueous liquid detergent with non-ionic surfactant was formulated from the following ingredients in the amounts indicated.

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Percent by weight

Surfactant, product D

13.5

Surfactant T7

10.0

Surfactant T9

10.0

acid-terminated Dobanol 91-5

5.0

Reaction product with succinic anhydride

Sodium tripolyphosphate (TPP)

29.6

anti-incrusting agent (Sokalan CP5)

4.0

Diethylene glycol monobutyl ether, gel-preventing agent

10.5

Phosphoric acid alkanol esters (Empiphos 5632)

0.3

Sodium perborate monohydrate, bleach

9.0

Ethylidene benzoate acetate, bleach activator

4.5

Bleach sequestering agent (Dequest 2066)

1.0

anti-reprecipitating agent (Relatin DM 4050) (1)

1.0

optical brightener (stilbene)

0.5

Enzyme (Esperase porridge)

1.0

Duet 787 (2)

0.6

100.0

'^ CMC / MC 2: 1 mixture of sodium carboxymethyl cellulose and hydroxymethyl cellulose

®Duet 787, a perfume i.e. Fragrance from IFF, Ina

The formulation was milled for about 1 hour to reduce the particle size of the suspended builder salts to less than 40 microns. The formulated detergent composition was stable, did not gel when stored and was easily dispersible in water. The bleach was effective at 40 ° C against both wine and immediate soot stains (immediate black soils).

The formulations of Examples 1 and 2 can also be prepared without grinding the builder salts and suspended solid particles to small particle size, but the best results are obtained by grinding the formulation to reduce the particle size of the suspended solid particles.

You can use the builder salts as supplied, or you can grind or partially grind the builder salts and suspended particles before mixing them with the nonionic surfactant. The grinding can be carried out partly before the mixing and can be completed after the mixing, or the entire grinding step can be carried out after the mixing with the liquid surfactant. The formulations comprising suspended builders and solid particles with sizes below 40 microns are preferred.

The system of persalt bleach and liquid organic bleach activator compound of the invention can also be used in dishwashing detergents with non-ionic surfactant, creamy abrasives, and other compositions to be bleached.

Claims (15)

Claims 1. Composition for treating and cleaning textiles, characterized by a content of a non-ionic liquid surfactant, - An inorganic peroxygen compound as a bleaching agent and - A liquid organic bleach activating compound, also called bleach activator. 2. Composition according to claim 1, characterized in that it contains a viscosity-controlling and gel-preventing agent. 3. Composition according to claim 1, characterized in that it contains at least one viscosity-controlling and gel-preventing agent from the group consisting of alkylene glycol monoalkyl ether and a nonionic surfactant with a terminal acid group. 4. Composition according to claim 1, characterized in that it contains a suspension of insoluble inorganic builder salt. 5. Composition according to claim 1, characterized in that the liquid organic bleach activating compound has the formula 13 5 10th 15 20th 25th 30th 35 40 45 50 55 CH 675 251 A5 O left Rj-CH o-c-r2 O — C — R H O in which Ri, Ffe and R3 are hydrocarbon radicals or C4-C6 heterocyclic radicals which ensure that the organic compound is a liquid. 6. The composition according to claim 4, characterized in that the insoluble inorganic builder contains 10 to 60% of a polyphosphate builder. 7. The composition according to claim 1, characterized in that it contains one or more adjuvants from the group consisting of anti-incrusting agent, sequestering agent, anti-precipitation agent, optical brightener, enzymes and perfume. 8. The composition according to claim 1, characterized in that it contains 10 to 60% of a non-ionic liquid surfactant. 9. The composition according to claim 3, characterized in that it contains 5 to 30% of an alkylene glycol colmonoalkyl ether. 10. The composition according to claim 4, characterized in that the inorganic builder salt has a particle size of less than 40 microns. 11. The composition according to claim 1, characterized in that it contains about 0.1 to about 0.5% by weight, based on the total composition, of a phosphoric acid ananol ester as a sediment-preventing stabilizing agent! contains. 12. Non-aqueous builder-containing heavy-duty textile detergent composition according to claim 1, which is pourable at high and low temperatures and does not gel when mixed with cold water, characterized by a content of at least one liquid non-ionic surfactant in an amount of about 10 to about 60% by weight; at least one inorganic builder salt suspended in the nonionic surfactant in an amount of about 10 to about 60% by weight; an inorganic peroxygen bleach in an amount of about 5 to 15% by weight; Ethylidene benzoate acetate as a bleach activator in an amount of about 1 to 8.0% by weight; an acid-terminated nonionic surfactant as a gel-preventing additive in an amount of about 0 to 20% by weight; and a compound of the formula in which Ri is a C2 to Cs alkyl group, R2 is hydrogen or methyl and n is a number with an average value of 1 to 6, as a gel-preventing additive in an amount of 5 to 30% by weight. 13. Detergent composition according to claim 12, characterized in that it contains one or more auxiliaries from the group consisting of anti-scale agent, sequestering agent, anti-precipitation agent, optical brightener, enzyme and perfume. 14. Non-aqueous liquid heavy duty laundry detergent composition according to claim 1, characterized by a weight-based content of approximately 20 to 50% non-ionic surfactant, 15. Non-aqueous liquid heavy duty detergent composition according to claim 12, characterized by a weight-based content of 30 to 40% non-ionic surfactant, 1 to 10% acid-determined non-ionic surfactant to improve viscosity, 25 to 35% sodium tripolyphosphate, 2 to 4% sodium salt of the copolymer of acrylic acid and maleic anhydride, 1 i R 0 (CHCH "0) H «TI ; 14 5 10th 15 20th 25th 30th 35 40 45 50 55 CH 675 251 A5 5 to 15% diethylene glycol monobutyl ether, 0.2 to 0.5% phosphoric acid alkanol ester, 5 to 15% sodium perborate monohydrate as bleach, 2 to 6.0% ethylidene benzoate acetate as bleach activator, 0.50 to 1.25% sequestering agent for bleaching and 0.5 to 1.5% anti-precipitation agent. 15 15 to 50% sodium tripolyphosphate (TPP), 1 to 8% sodium salt of the copolymer of acrylic acid and maleic anhydride, 5 to 20% diethylene glycol monoalkyl ether, 0.1 to 1.0% phosphoric acid alkanol ester, 2 to 20% sodium perborate monohydrate as a bleach, and 1 to 8% ethylidene benzoate acetate as a bleach activator.