JPH0572440B2 - - Google Patents

Abstract

A dishwashing liquid detergent composition comprising a surfactant mixture composed of alkyl sulphate, alkyl ether sulphate, alkane or alkene sulphonate and ethoxylated nonionic surfactants, the alkyl sulphate being present in the form of its magnesium salt. The combination of the ethoxylated nonionic and alkyl sulphate surfactants provides enhanced particulate soil suspension capability with no loss in sudsing or grease cutting properties.

Description

[Detailed description of the invention]

The present invention relates to liquid detergent compositions, and in particular to so-called light duty liquid detergents, primarily for dishwashing. More particularly, the present invention relates to dishwashing liquid detergent compositions that are formulated to ensure improved particulate soil removal ability without compromising other performance areas, such as grease and oil stain removal and foaming ability. . The greasy and/or oily nature of most food residues, along with the need to provide a satisfactory volume of suds over the duration of a dishwashing job, makes grease and oil stain removal a primary focus of dishwashing detergent performance. This is reflected in the composition of liquid detergent products formulated primarily or exclusively for dishwashing. Products of this type usually consist of a combination of one or more surfactants and foam builders dissolved or dispersed in a hydrotrope-water system. Dishwashing detergent formulations of this type include magnesium salts and magnesium surfactants, such as alkyl sulfates, alkyl ether sulfates and alkylbenzene sulfonates;
And UK Patent No. 1524441, No. 1551074, No. 2010893A and European Patent Application Publication No. 0039110 are representative disclosures of the state of the art. The art teaches that these formulations have increased performance when used in water of low mineral hardness. Liquid dishwashing detergent compositions containing alkanesulfonates and alkenesulfonates are also known, examples of disclosures of this type include GB 1050848, 1339069, 1382295, 1451228. 1551074 and 1567421. Formulations of this type, using total amounts of surfactants greater than 25% by weight, cannot tolerate significant amounts of inorganic detergent builder salts while retaining a clear single-phase solution form, and, additionally, The presence of inorganic salts results in aesthetically undesirable residues on cleaned ceramic tableware or tableware. Therefore, these formulations are usually substantially completely free of detergent builder salts, while metal chelators, if included, are used in only trace amounts. Nevertheless, particulate matter is also a significant component of food residue, and the low or no presence of detergent builder substances in regular dishwashing liquid detergents makes these formulations less susceptible to the presence of particulate soils. This results in suboptimal conditions both in terms of suds stability at the bottom and suspension of particulate soil during the cleaning process. Certain combinations of ingredients, more specifically alkaline earth metal alkyl sulfates and ethoxylated alcohols, have shown unexpected improvements in particulate soil handling ability without sacrificing the grease and oil stain removal performance of dishwashing liquid formulations. It has now been found that it gives The use of ethoxylated alcohols as a component of liquid dishwashing detergents is known in the art and is exemplified in GB 1,567,421 and GB 1,551,074. but,
The claimed benefits of these formulations are primarily in the area of suds enhancement and very little in grease removal. Additionally, the use of ethoxylated alcohols in liquid dishwashing detergents is limited by the elevated chill point temperatures they produce. For example, incorporation of ethoxylated alcohols into formulations such as those described in European Patent Application Publication No. 0039110 results in products exhibiting insufficient performance benefits as well as completely unacceptable stability properties. Thus, the discovery that the compositions of the present invention have particulate soil removal ability as well as acceptable physical properties is even more unexpected. Therefore, according to the invention, water-soluble _C13 - _C18 alkanes or alkenesulfonates in hydrotrope-water systems, water-soluble alkyl ether sulfates (the alkyl group has from 10 to 16 carbon atoms and the ether group is on average a surfactant mixture prepared by a combination of a polyethoxy group containing 0.5 to 6 ethoxy groups) and an ethoxylated _C8 to _C12 primary alcohol, and the surfactant mixture is 6-18% by weight of a primary _C10 - _C16 alkyl sulfate and of the composition.
2.0-5.0 wt% HLB7.5-12.0 ethoxylated C8 _~
Contains _C12 alcohol, composition is 0.40X~0.60X
(wherein X is the molar amount of alkyl sulfate in the composition) be done. The present invention consists of a surfactant system containing an alkane, sulfonate or alkene sulfonate, alkyl ether sulfate, alkyl sulfate, and an ethoxylated nonionic surfactant component in a liquid vehicle consisting of a hydrotrope and water. The alkyl sulfate surfactant component has an alkyl group preferably having 10 carbon atoms in the alkyl chain.
-16, more preferably a primary alkyl sulfate having an average carbon number of 12-15. _C10 to _C16 alcohols derived from natural fats or Ziegler olefin augmentation or oxo synthesis constitute suitable sources for alkyl groups. Examples of synthetically derived substances are Dobanol 23®, sold by Shell Chemicals Limited (UK), Ethyl 23®, sold by Ethyl Corporation. )
24, C ₁₃ 67%, C ₁₅ 33, sold by BASF GmbH under the trade name Lute-nsol
Formulations of _C13 - _C15 alcohols in the proportion of % and
Synperonic®, sold by ICI Limited, and Lial 125 (highly branched C ₁₂ -C ₁₅ primary alcohol), sold by Liquitimica Italiana. Examples of naturally occurring substances that are raw materials for alcohols are coconut oil and palm kernel oil and the corresponding fatty acids. The alkyl sulfate component is from 6 to 18 of the composition.
% by weight, more generally from 8 to 16% by weight. For the purposes of this invention, the alkyl sulfate is a source of magnesium ions that can be introduced as an oxide or hydroxide or added to the composition as a water-soluble salt to neutralize the acid, as described below. A meeting will be held. However, when significant amounts of magnesium salts are added to the dishwashing compositions of the present invention, the inorganic salt crystals increase the temperature that occurs in the composition upon cooling and are therefore less preferred. The molar amount of magnesium ions in the composition ranges from 0.40 to 0.60M, preferably from 0.45 to _0.55X , where X
(moles of _C16 alkyl sulfate). Most preferably, the magnesium ion content is adjusted to provide stoichiometric equivalents of the alkyl sulfate present. In practice, magnesium ions account for 0.15 to 0.70 of the composition.
It is present in an amount of 0.35-0.60% by weight. The s-alkanesulfonate (paraffin sulfonate) component or the alkenesulfonate (α-
Olefin sulfonate) ingredient is 3 in the formulation.
-15% by weight, more preferably 4-12% by weight. The secondary alkanesulfonates useful in this invention preferably have from 13 to 18 carbon atoms per molecule, most preferably from 14 to 17 carbon atoms, and include alkylaryl sulfonates and other sulfuric acids used for dishwashing detergent compositions. Characterized by high water solubility compared to the reaction products. These sulfonates are preferably produced by subjecting cuts of paraffin corresponding to the aforementioned chain lengths to the action of sulfur dioxide and oxygen according to the well-known sulfoxidation process. The product of this reaction is a secondary sulfonic acid which is neutralized with a suitable base to give a water soluble secondary alkyl sulfonate. Similar secondary alkyl sulfonates are obtained by other methods, for example by sulfochlorination methods. In the sulfochlorination process, chlorine and sulfur dioxide are reacted with paraffin in the presence of actinic radiation, and the sulfonyl chloride produced is hydrolyzed and neutralized to form a secondary alkyl sulfonate.
Whichever technique is used, the sulfonate can be produced as a monosulfonate with no or only a limited proportion of unreacted starting hydrocarbons and with little or no inorganic salt by-products. Generally desirable. Similarly, the proportion of disulfonates or higher sulfonated substances will be minimized, but some can be present. The monosulfonate may be terminally sulfonated or the sulfonate group may be attached on the 2-carbon or other carbon of the linear chain. Similarly, entrained disulfonates, which are normally formed when excess sulfonating agent is present, can have sulfonate groups distributed over different carbon atoms of the paraffin base, and the combination of monosulfonate and disulfonate Mixtures can exist. The alkane has 14 and 15 carbon atoms and the sulfonate is in a weight ratio of _C14 paraffin to _C15 paraffin of 1:3 to 3:1, preferably 1:2.
Particularly preferred are mixtures of monoalkanesulfonates present in a 2:1 ratio of . Surprisingly, this particular mixture cleans dishes better and produces a detergent that foams for a longer time, especially in hard water, than other alkanesulfonate mixtures, such as those having 13 to 17 carbon atoms. This is also true, to a lesser extent, for the individual components of mixtures of _C14 and _C15 . The term "alkenesulfonate" or "alpha-olefin sulfonate" refers to the sulfonation of alpha-olefins with simple sulfur trioxide, after which the sultone produced during the reaction is hydrolyzed to give the corresponding hydroxyalkasulfonate. used herein to mean a compound that can be produced by neutralizing an acidic reaction mixture under conditions. Sulfur trioxide can be in liquid or gaseous form, and is usually, but not necessarily, treated with an inert diluent, such as liquid SO ₂ , chlorinated hydrocarbons, etc. when used in liquid form. When used in gaseous form, it is diluted with air, nitrogen, gaseous SO ₂ , etc. α-olefin, which is a raw material for alkenesulfonate, has 12 to 16 carbon atoms, preferably 12 to 14 carbon atoms.
It is a monoolefin having the following properties. Preferably they are linear olefins. Alkenesulfonates with a carbon number higher than 16 do not give the desired high foaming performance in the mixture according to the invention;
Those with fewer carbon numbers have reduced detergency. In addition to the alkenesulfonate and the proportion of hydroxyalkanesulfonate, the alkenesulfonate can contain trace amounts of other substances resulting from impurities in the olefin feedstock and from side reactions during the sulfonation and neutralization processes. The alkyl ether sulfate component is _C10 ~
It consists of primary alkyl ethoxy sulfates derived from condensates of C ₁₆ alcohols and an average of 0.5 to 6 ethylene oxide groups. The C ₁₀ -C ₁₆ alcohol itself can be obtained from the sources mentioned in the case of the alkyl sulfate component. However, it has been found preferable to use alkyl sulfates and alkyl ether sulfates with the same carbon chain length distribution. _C12 - _C15 alkyl ether sulfates are preferred and the amount of alkyl ethoxy sulfate within the composition ranges from 0.5 to 20%, generally from 4 to 14% by weight of the composition. The usual average degree of ethoxylation is from 0.5 to 3 groups per mole of alcohol, but since conventional ethoxylation processes result in a distribution of individual ethoxylates from 1 to 10 ethoxy groups per mole of alcohol, Averages can be obtained in a variety of ways. Formulations can be prepared from materials with different degrees of ethoxylation and/or different ethoxylate distributions resulting from the particular ethoxylation technique used and subsequent processing steps, such as distillation. In fact, foaming and degreasing performance equal to that provided by a blend of alkyl sulfate and alkyl ethoxy ether sulfate reduces the overall degree of ethoxylation and increases the ethoxylated alkyl sulfate versus unethoxylated alkali. By using an alkyl ether sulfate, the proportion of sulfate is the same as that obtained by mixing the surfactants separately,
It has been discovered. Cations other than magnesium that can be used to neutralize the anionic surfactant can be sodium, potassium, ammonium or alkanol ammonium, with ammonium being the preferred cation due to its lowering effect on the chill point temperature of the composition. be. Preferred compositions have chill points below 0°C. The surfactant system also contains an ethoxylated _C8 - _C12 primary alcohol with an HLB (hydrophilic-lipophilic balance) of 7.5 to 12.0, preferably 8.0 to 9.5. The structure of the primary alcohol can be linear or branched and can be derived from sources such as those described in connection with the alkyl sulfate component. The preferred substance is alcohol with _C9 - _C11
There are those derived from hydrocarbon fractions, and the hydrocarbon materials contain up to 25% methyl branches and the degree of ethoxylation is on average 2-3, preferably 2.5 ethoxy groups per mole of alcohol. give. Typical composition ranges for the surfactant combinations are as follows. C ₁₂ - C ₁₃ alkyl sulfate 6 - 10% C ₁₂ - C ₁₃ alkyl (EO) ₂ sulfate 8 - 12% C ₁₄ - C ₁₇ alkanesulfonate 8 - 12% C ₉ - C ₁₁ (EO) _2.5 2.0 - 3.0 % C ₁₃ - C ₁₅ alkyl sulfate 12 - 16% C ₁₃ - C ₁₅ alkyl (EO) ₂ sulfate 4 - 8% C ₁₄ - C ₁₇ alkanesulfonate 4 - 8% C ₉ - C ₁₁ (EO) _2.5 2 - 4% _C13 - _C15 alkyl (EO) _0.5-1.0 sulfate ^*
16-22% _C14 - _C17 alkanesulfonates 4-8% _C9 - _C11 (EO) _2.5 2-4% *: It has alkyl sulfates 12-16% and an average degree of ethoxylation of about 2 Ethoxylation
It corresponds to 4-6% of _C13 - _C15 alkyl sulfate. A desirable ingredient optionally included in the present invention is a foam enhancer, up to 5% by weight, preferably 3-4% by weight. Foaming accelerators are _C12 - _C14 mono- and di- _C2
~ _C3 alkanolamide, per mole of amide
_C12 condensed with up to 15 moles of ethylene oxide
_-C14 alkyl amides and tertiary amine oxides containing _C8 - _C18 alkyl groups. Examples of alkanolamides are coconut alkyl monoethanolamide, coconut alkyl diethanolamide, coconut alkyl monoisopropanolamide and coconut alkyl diisopropanolamide. Examples of ethoxylated amides are coconut alkylamide condensed with an average of 6 moles of ethylene oxide, laurylamide condensed with an average of 8 moles of ethylene oxide, myristylamide condensed with an average of 10 moles of ethylene oxide, and myristylamide condensed with an average of 8 moles of ethylene oxide. It is coconut amide condensed with. Amine oxides useful in the present invention include one alkyl or hydroxyalkyl moiety having 8 to 18 carbon atoms, preferably 8 to 16 carbon atoms, and a moiety selected from alkali groups and hydroxyalkali groups having 1 to 3 carbon atoms. It has two pieces. Examples of amine oxides of this type are dimethyloctylamine oxide, diethyldecylamine oxide, bis-(2-hydroxyethyl)dodecylamine oxide, methylethylhexadecylamine oxide, and dimethyl-2-hydroxyoctadecylamine oxide. A highly preferred example of a tertiary amine oxide is
_C12 - _C14 alkali group is _derived from coconut oil
~ _C14 alkyldimethylamine oxide. The remainder of the formulation consists of the hydrotrope-water system, and the hydrotrope can be urea, a _C1 - _C3 alkanol, or a lower alkylbenzene sulfonate, such as toluene sulfonate, cumene sulfonate or xylene sulfonate. A preferred hydrotrope is ethanol used at 3-10%, preferably 4-8% by weight of the composition. Components optionally included in the liquid detergent composition of the present invention include, for example, thickeners such as guar gum,
Antibacterial agents such as glutaraldehyde and Bronopol®, anticorrosive agents such as benzoxytriazole, heavy metal chelators such as EDTA or EDTMP, fragrances and dyes. The PH of the composition can be any PH within the range of 6 to 7.5, but as-prepared the composition is usually between 6.6 and 7.5 to maintain color stability.
It has a PH in the range of 7.3, preferably between 6.6 and 6.9. The technique of incorporating magnesium ions is not believed to be critical, and the compositions can be prepared in a number of ways. Individual anionic surfactants are prepared as aqueous solutions of alkali metal or ammonium salts,
This aqueous solution is then mixed with the hydrotrope and, if incorporated, a foam enhancer, after which the magnesium ion can be introduced as a water-soluble salt, such as chloride or acetate. Optionally added minor ingredients are then added, and the PH and viscosity are then adjusted. This method has the advantage of utilizing conventional techniques and equipment, but introduces additional chloride or acetate ions that increase the chill point temperature (the temperature at which the inorganic salt precipitates as crystals in the liquid). Another method of carrying out the invention is to mix the alcohol and alcohol ethoxylate together and perform a single sulfation and neutralization. In this case, alcohol and alcohol ethoxylate should be mixed in a weight ratio of 45:1 to 1:55. Sulfation is carried out using ordinary sulfating agents,
For example, it can be produced by sulfur trioxide or chlorosulfonic acid. Neutralization of alkyl ether sulfates and alkyl sulfates is carried out using magnesium oxide or magnesium hydroxide slurries avoiding the addition of chloride or sulfate ions. Although not required, it is convenient to use mixtures of these acids since the magnesium salt of the alkyl ether sulfate has a relatively higher water solubility than the alkyl sulfate component. The separately neutralized paraffin sulfonate and neutralized alkyl sulfate and alkyl ether sulfates and hydrotropes are then added to the final bath and the PH
The C ₈ -C ₁₂ alcohol ethoxylate and optional ingredients are added before it is prepared as described above. Yet another preferred variation of the technique involves the preparation of a single alcohol ethoxylate feedstock whose composition is the same or similar to the composition of the alcohol and alcohol ethoxylate blend.
For the purposes of the present invention, an average degree of ethoxylation of 0.5
Alcohol ethoxylates having a value of ~1.0, more usually 0.75 to 0.95 are preferred. Variations on this latter technique can also be used. In this variant, either a neutralized paraffin sulfonate or a neutralized alkyl sulfate/alkyl ether sulfate mixture is used as a heel to neutralize the acid form of the other; This avoids local overheating and the formation of viscous phases. The invention is illustrated in the following examples and the percentages of ingredients are by weight based on the final composition. Example The following composition was prepared. C _{13-15 Alkyl Sulfate} (1) 8.6 C _{13-15 Alkyl} (EO) ₂ Sulfate (2) 10.4 C _14-17 Alkanesulfonate Dovanol 91E _2.5 (3)
2.7 Narrow Cutlet Coconut Monoethanolamide
4.0 Ethanol 5.0 Fragrances, colorants and trace ingredients 1.0 Water balance 100 NH ₄ ⁺ ions 0.47 parts, Na ⁺ ions 0.78 parts and
Contains 0.34 parts of Mg ⁺⁺ ion, the amount of Mg ⁺⁺ is 0.5X
(wherein, X is the number of moles of alkyl sulfate). (1) Synberol 35®, sold by ICI Limited, derived from C ₁₃ -C ₁₅ primary alcohols (2) Synverol 35® (registered trademark) fused with an average of two ethylene oxide groups per mole of alcohol Trademark) Derived from Primary Alcohols (3) _C9 to _C11 primary alcohols fused with an average of 2.5 ethylene oxide groups per mole of alcohol, sold by Ciel International Chemicals Limited. The alkanesulfonate was previously produced by sulfonating a _C14 - _C17n -alkane with _SO2 and neutralizing the resulting sulfonic acid with caustic soda to give an approximately 60% active paste starting material.
This is diluted with water and a small amount of ethanol
A 30% active solution was prepared and the monoethanolamide was dispersed under stirring to aid its dissolution. The blend of alcohol and alcohol ether condensate was sulfated using chlorosulfonic acid as the sulfating agent, and then the mixed sulfuric acid was neutralized with magnesium hydroxide and ammonia, respectively. Practical neutralization (to PH 3.0) was carried out using a heel prepared with a dilute alkanesulfonate paste in which ammonia and magnesium hydroxide were dispersed before addition of mixed sulfuric acid. The PH was then adjusted to PH 6.6 with ammonia before the ethoxylated nonionic surfactant and other minor ingredients (dye, fragrance) were added to prepare the final composition. The final product had a viscosity of 230 centipoise at 20°C and a chill point of -3°C. Examples The following compositions are prepared using the same materials as in the examples. C _13-15 alkyl sulfate _14.0 C _13-15 alkyl (EO) ₂ sulfate _6.0 C _14-17 alkanesulfonate _6.0 Dovanol 91E _2.5 3.5 Narrow cutlet coconut monoethanolamide
4.0 Ethanol 6.0 Minor components 1.3 Water 61.2 0.28 parts of NH ₄ ⁺ ions, 0.41 parts of Na ⁺ ions and
Contains 0.57 parts of Mg ⁺⁺ ion, the amount of Mg ⁺⁺ is 0.5X
(wherein, X is the number of moles of alkyl sulfate). The n-paraffin is sulfonated as in the example and neutralized to produce the sodium alkalsulfonate. _C12 ~ ₁₃ alcohol and _C12
A formulation of ~ ₁₃ alcohol ethoxylates is sulfonated using gaseous SO ₃ and then neutralized by addition to an ethanol/water mixture in which ammonia and magnesium hydroxide are dispersed. Additionally, ethanol, amide and _C9
The ~C ₁₁ alcohol ethoxylate is added to this mixture along with the alkanesulfonate. Flavors, colorants and acidic PH adjusting trace ingredients are then added to complete the preparation of a product with a -3°C chill point. Example Four liquid detergent formulations with the following compositions:
Prepared. Treatments A, B and C are commercially available liquid detergent products, while Formulation D is a product of the present invention.

[Table] Umu

TABLE A series of comparative evaluations of the formulations were performed using the mechanical foaming test method described below. This method uses a length of 30 cm + diameter of 10 cm that is fixed side by side and can rotate around the central axis at a speed of 24 rpm.
4 cylinders are used. Each cylinder is charged with 500 ml of product solution at a concentration of 0.12% and a temperature of 45°C. The two outer cylinders are used for one of the products to be compared, and the two inner cylinders are used for the other product. The cylinder is rotated for 2 minutes, stopped, the initial foam is measured, and then the soil load is added. The grease stain is made from a mixture of cooking fatty acids, namely: oleic acid, 2 parts linoleic acid, 2 parts stearic acid, 1 part palmitic acid, 2.5 parts pure corn oil, and 367 parts pure corn oil to give a 2% MFFA mixture oil base; 1 ml of this mixture (MFFA) is then added to each cylinder. If particulate soil is involved, it is all added at this stage. After 1 minute, the cylinder is restarted and allowed to rotate for 1 minute. Foam height is noted and 1ml of 1% MFFA
is added to each cylinder. After one minute, the cylinder is restarted. The height of the bubbles inside the cylinder is
This process continues until it is lower than 0.5 cm. One product is labeled Control, and foam and mileage numbers are calculated for the other products vs. the "control" product based on the following criteria: Foam in the test product = Total amount of foam produced by the test product up to and including the time when the foam reduces to 0.5 cm / By the control product until and including the time when the foam reduces to 0.5 cm Total amount of foam produced x 100 Mileage of test product = Number of soil additions to test product solution to reduce foam height to 0.5 cm / Soil to control product to reduce foam height to 0.5 cm Number of additions x 100 The mileage numbers for comparisons made using this test were as follows: The second identified product in each case constitutes the "control". 2°H 18°H BvsA ⁽¹⁾ 106 101 CvsA ⁽²⁾ 39 57 CvsB ⁽²⁾ 59 47 DvsB ⁽²⁾ 125 110 The bubble figures for the comparison made between products D and B are: It was hot on the street. DvsB ⁽²⁾ 119 109 (1) The figures quoted refer to a wide range of particulate-grease soil mixtures (i), such as (1) cake mixes (McDougalls sponge mixes).
(ii) 5 g of meat juice/wala water, 2% MFFA, (iii) 5 g of potato flour, 2% MFFA. (2) The figures quoted are CakeMitsukus 5g, 2
%MFFA for the soil mixture. Based on the above tests, it can be seen that the ranking of the formulations in terms of their mileage performance is D>B≧A≫C, where D is the formulation according to the invention. Furthermore, the data also show that the foaming performance of Formulation D in the presence of particulate soil is significantly better than that of Formulation B. In yet another mileage evaluation, the dirt (2)
Formulation B was compared to Formulation D using the formula D, and was also compared to Formulation D' in which the ethoxylated primary alcohol component was omitted. The results are shown below. Formulation B serves as a "control" and is labeled 100. 2°H 18°H DvsB 125 110 D′vsB 100 105 The benefits conferred by the incorporation of nonionic components are obvious. EXAMPLE A comparison was made of the soil suspension performance of example formulations D and B using the following test method. Two beakers were each filled with 1500 ml of soft water (2°H) at a temperature of 40°C. A magnetic stirrer was placed in each beaker and turned on. The stirring mechanism was adjusted so that both beakers were stirred at the same speed. Cake mix 20g, 2%
15 ml of MFFA and the desired weight of detergent product were placed in each beaker. One product is the "test" product, and the other product constitutes the "standard."
The solution was then stirred for about 15 minutes (to allow a homogeneous solution to form), after which the solution was allowed to stand for 10 minutes, at which time some of the solid soil settled onto the bottom of the beaker and
The remainder remained in suspension. Most of the suspension then settled onto the bottom of the beaker, with the remainder remaining in the suspension. Most of the suspension is then decanted from each beaker leaving the same volume of residual liquid in each beaker and the water is then evaporated to provide a cake mix residue. The beaker + residue was weighed and the beaker was washed and then reweighed to give the weight of the residue. The test was then repeated with the equipment for each product reversed. Soil adhesion was calculated using the following criteria. Redeposition index = % adhesion by test / % adhesion by standard x 10
0 = Amount deposited by test/Weight added to test/Amount deposited by standard/Weight added to standard x 100 For this criterion, a value greater than 100% indicates that the test product is more than the standard. indicates sticking (i.e. worse), while values less than 100%
Indicates that the test product is superior to the standard. The test can predict the ranking of products in terms of their ability to suspend particulate soil under normal use conditions. Using the test described above with Product B constituting the standard, Product D gave a value of 92% at a product concentration of 0.4% and a value of 80% at a product concentration of 0.25%, thereby making it suitable for the present invention. The particulate soil suspension benefits provided by such formulations are illustrated.

Claims (1)

Claims: 1. Hydrotrope - comprising a mixture of surfactants in an aqueous system, wherein the surfactant is (a) a water-soluble C ₁₃ -C ₁₈ alkane or a C ₁₂ -C ₁₆ alkene sulfonate (b) a water-soluble alkyl poly Ethoxy sulfate (the alkyl group has 10 to 16 carbon atoms and the polyethoxy group contains an average of 0.5 to 6 ethoxy groups) (c) ethoxyl with an HLB of 7.5 to 12.0 in 2.0 to 5.0% by weight of the composition primary C8 _{- C12} alcohol (d) is prepared in combination with 6-18% by weight of the composition of primary _C10 - _C16 alkyl sulfate; The first class C ₁₀ ~
A transparent homogeneous magnesium-containing liquid detergent composition having a chill point of 5° C. or less, characterized in that it contains an amount of magnesium ions corresponding to the molar amount of C ₁₆ alkyl sulfate. 2. The liquid detergent composition according to claim 1, wherein the ethoxylated alcohol has an HLB of 8.0 to 9.5. 3. Any one of claims 1 and 2, wherein the alkyl sulfate has an average of 12 to 15 carbon atoms in the alkyl chain and is present in an amount of 8 to 16% by weight of the composition. The liquid detergent composition described in . 4 _C12 - _C14 mono- and di- _C2 - _C3 alkanolamides, containing _C12 - _C14 alkyl amides and _C8 - _C18 alkyl groups fused with up to 15 moles of ethylene oxide per mole of amide 4. A liquid detergent composition according to any one of claims 1 to 3, further comprising a suds enhancer selected from tertiary amine oxides. 5 _C14 - _C17 alkanesulfonate 8-12% by weight
and ₈ to ₁₂ wt. Contains _C9 - _C11 primary alcohol ethoxylates 2.0
Liquid detergent composition according to any one of claims 3 and 4, which also contains ~3.0% by weight. 6 _C14 - _C17 alkanesulfonate 4-8% by weight
and 4 to 8% by weight of _C13 to _C15 alkyl polyethoxy sulfates containing on average 2 ethoxy groups per mole, and _C9 to _C11 containing on average 2 to 3 ethoxy groups per mole of alcohol. Liquid detergent composition according to any one of claims 3 and 4, comprising 2 to 4% by weight of primary alcohol ethoxylate.