DK163308B - ANTI-EFFICIENT EFFECTIVE LIQUID CLEANING BENTONITE - Google Patents

Description

in

DK 163308B

The present invention relates to a fabric softening, powerful liquid detergent having a density in the range of 1/15 - 1.35 g / ml at room temperature, a pH in the range of 9.5 to 11 and a viscosity in the range of 1,000 to 5,000 cents in 5 poise which does not rise to more than 6,000 centipoise at 30 days of quiet storage at room temperature, comprising 5-15% linear or branched alkali metal higher alkyl benzenesulfonate wherein the right alkyl has 10-16 carbon atoms, 1, 5 to 5% of alkali metal cooling polyethoxy sulfate, wherein the alkyl 10 has 10 to 16 carbon atoms and polyethoxy is of 2 to 11 ethylene oxide groups, 5 to 25% of water-soluble builder salt, 5 to 20% of a swelling bentonite and 40 to 75% of water.

In particular, the invention relates to such a liquid detergent comprising further described synthetic organic detergent and builder components together with a swelling bentonite and a low molecular weight polyacrylate in an aqueous medium. The product of the invention has an improved stable viscosity or thickness, even after being stored for a month, can be easily poured and is a good laundry detergent and fabric softener.

Powerful liquid detergents useful for machine washing have been negotiated and have been described in various patents and in the iteration. Bentonite has been included in particulate cleaners as a fabric softener and has been used in aqueous agents as a thickening agent which can help keep insoluble particulate materials, such as abrasives, suspended in a liquid medium. According to U.S. Patent No. 4,469,605, good result concrete was used to prepare what was then considered to be an acceptable stable, fabric softening, powerful liquid detergent in which the concrete was the fabric softening component. It has now been recognized that although the detergents disclosed in said patent are stable and relatively constant in viscosity upon storage when manufactured in a laboratory or pilot plant, often thickened upon storage when manufactured in a production plant. .

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The detergent according to the invention is characterized in that it contains 0.05 to 5% water-soluble polyacrylate, e.g. sodium polyacrylate, with an average molecular weight in the range of 1,000 - 5,000.

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The liquid detergent described is an industrially acceptable powerful laundry detergent capable of satisfactorily cleaning laundry containing both oily and particulate dirt, and at the same time depositing enough bentonite on the laundry 10 to soften it considerably. The disclosed agent can also be used for the pre-treatment of heavily soiled areas, such as flippers and cuffs, to be washed on clothing, by which treatment the presence of the bentonite in the liquid, which can be applied directly to the 15 areas of any rubbing, is considered to be be useful to mechanically support loosening or removing the dirt.

The synthetic anionic organic detergent mixture found in the liquid cleaners of the invention is a mixture of linear or branched (preferably linear) higher alkylbenzenesulfonate and alkyl polyethoxy sulfate. Other water-soluble linear higher alkyl benzene sulfonates may also be found in the present compositions, such as potassium salts and in some cases the ammonium and / or alkanolammonium salts, but it has been found that the sodium salt is highly preferred, as is also the case with the alkyl polyethoxysulfate component. The alkyl benzene sulfonate is one in which the higher alkyl has 12 to 16 carbon atoms, preferably 12 to 15 and more particularly 12 to 13 and 30 most conveniently 13 carbon atoms. The alkyl polyethoxy sulfate, which may also be referred to as a sulfated polyethoxylated linear alcohol, or the sulfated condensation product of a higher fatty alcohol and ethylene oxide or polyethylene glycol, is one in which the alkyl has 10 to 16 carbon atoms, preferably 12 to 15 carbon atoms, e.g. ca. 13 carbon atoms and containing 2-11 3

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ethylene oxide groups, preferably 2 - 7 and more preferably 3-5 and best 3 or ca. 3 ethylene oxide groups. Under suitable circumstances, other anionic detergents such as fatty alcohol sulfates, paraffin sulfonates, olefin sulfonates, monoglyceride sulfates, sarcosinates, sulfosuccinates and similar functioning detergents, preferably as alkali metal salts, e.g. sodium salts, sometimes present, to partially replace the aforementioned synthetic organic detergents, but usually, if present, next to these detergents. Typically, such other detergents will be sulfated or sulfonated products (usually as the sodium salts) and will contain long chain (8-20 carbon atoms) linear or fatty alkyl groups. In addition to such other or supplemental anionic synthetic organic detergents, non-ionic and amphoteric materials, such as "Neodoles" ®, which are sold by Shell Chemical Company, which are condensation products of ethylene oxide and higher fatty alcohols, can also be found. "Neodol" 23-6.5, which is a condensation product of a higher fatty alcohol of approx. 12-13 carbon atoms with approx. 6.5 moles of ethylene oxide. Illustrations of the 20 different detergents and classes of detergents mentioned can be found in Surface Active Agents, Volume II, by Schwartz, Perry & Berch (Interscience Publishers 1958) and in a number of annual publications entitled McCutcheon's Detergents and Emulsifiers, f. .g. the one published in 1969, the descriptions of which are incorporated herein by this reference.

The builder salt combination of the invention which has been found to satisfactorily improve the purity of the mixture of synthetic anionic organic detergents which provide the desired pH in the liquid detergent and in the wash water, and which cooperates with the detergent and bentonite in the softening process, is a mixture of sodium tripolyphosphate and sodium carbonate. Although in some cases incompletely neutralized tripolyphosphate can be used, the phosphate used can usually be considered as pentane sodium tripolyphosphate.

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phosphate, Naj-P ^ O ^. Of course, in some cases, when potassium salts of other materials are present, ion exchange in an aqueous medium may result in salts other than the sodium tripolyphosphate present, but for the purposes of the present disclosure, from the fact that the sodium tripolyphosphate as the pentane sodium salt, the material normally added to the mixer to prepare the present liquid detergent, is the tripolyphosphate used.

Other preferred builder salts which may be used in place of or in addition to sodium tripolyphosphate and sodium carbonate include sodium citrate and potassium citrate and sodium nitrilo triacetate (NTA). The corresponding potassium salts can be used to partially replace these other builder salts. Various mixtures of said water-soluble builder salts can of course be used. The described mixture of tripolyphosphate and carbonate has been found to be most preferred, although other builders and mixtures thereof may also be used. Still other builders can be used as a supplement in addition to the quantities of the above builders to be described below. Other phosphates, such as tetrasodium pyrophosphate or tetracotassium pyrophosphate, sodium bicarbonate, sodium sesquicarbonate, sodium gluconate, borax, sodium silicate and sodium sesquilicate may also be used. Also useful may be the polyacetal carboxylate builders disclosed in U.S. Patent No. 4,144,226 and other related Monsanto Company patents and available under the trade name "Builder U". Of the water-insoluble builders that can be used, the zeolites, such as Zeolite A, are usually in the form of its crystalline hydrate, although amorphous zeolites may also be useful. It is a feature of the invention that sodium silicate is not required to produce an effective potent cleansing and softening agent and therefore such silicate will generally be omitted from the present compositions and the undesirable properties it may have therefore be avoided

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gone. An eventual tendency of silicate to react with other components of the liquid detergent such as zeolite; sodium carbonate or other builder, to form insoluble material which may be prone to adhering to the laundry 5 thereby adversely affecting the desired clear colors of the laundry, e.g. avoided. The absence of silicate in the detergent medium also prevents the formation of insoluble silicon-containing decomposition products of the silicate, which could tend to adversely affect the appearance of the liquid detergent and the laundry if they became visible in the liquid detergent or were deposited on the laundry.

The bentonite used is a colloidal clay (aluminum silicate) containing montmorillonite. The type of bentonite that is most useful in making the found beads is that known as sodium bentonite (or Wyoming or Western bentonite), which can usually be light to cream or may be a brownish yellow intangible powder such as in water. can form a colloidal suspension that has strong thixotropic properties. In many cases, a potassium bentonite or a mixed potassium-sodium-bentonite can be used instead. In water, the swelling capacity of such a clay will usually be in the range of 3-15 or 20 ml / g, preferably 7-15 ml / g, and its viscosity at a concentration of 6% in water will usually be in the range of 3-30. centipoise, preferably 8-30 centipoise. Preferred asphyxiating bentonites 25 of this type are traded under the trade name "Mineral Colloid" as industrial bentonites by Benton Clay Company, a major clay supplier to the industry. These materials, similar to those previously sold under the trademark "THIXO-JEL", are selectively excavated and enriched bentonites, and 30 those considered to be the most useful are available as "Mineral

Colloid "No. 1, etc., corresponding to" THIXO-JEL "Nos. 1, 2, 3 and 4. Such materials have pH values (6% concentration in water) in the range of 8 - 9.4, maximum free moisture content ( before adding to the liquid detergent) of 4 - 8% and by weight 6

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of 2.6. For the powdered quality of such materials, at least 85% will go through a 200 mesh US sieving standard. Preferably, all the bentonite will pass through a 200 mesh screen and most conveniently it will all pass through or be about the size just passing through a No. 325 screen, so that the equivalent diameter of the bentonite can be considered to be less than 74 microns and preferably approx. or less than 44 microns. A useful industrial source of comminuted bentonite of satisfactory color is the American Colloid Company, and 10 of their bentonites are those traded as "AEG" 325 bentonite, the one considered to be interchangeable with the aforementioned "Mineral Colloid" and " Thixo-JEL ". Although enriched "Wyoming" bentonite is preferred as a component of the present liquid cleansers, other bentonites, including the synthetic bentonites (those made of exchangeable calcium and / or magnesium bentonites by treatment with sodium carbonate) are also useful and may be included in the compositions of the invention. Typical chemical analyzes of some bentonites useful in preparing the present liquid detergents show that they contain from 64.8 to 73.0% SiO 2, 14 - 18% Al 2 O 3, 1.6 - 2.7 % MgO, 1.3 - 3.1% CaO, 2.3 - 3.4% Fe2O3, 0.8 - 2.8% Na2O, and 0.4 - 7.0% K2O.

Use of bentonite as a fabric softener in the present liquid detergents has the advantage that the bentonite does not need to be dried as in a spray-drying apparatus and the risk of losing the softening ability of the bentonite due to immobilization of the component plates therein. Overdrying is therefore avoided. It is also unnecessary for the detergent of the invention to have such a composition that it promotes rapid decay of the detergent beads in the wash water to release the bentonite particles, since such particles in the liquid detergent are not agglomerated to hard masses which could require additional time for decay. .

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The polyacrylate used is a low molecular weight sodium polyacrylate, with the average molecular weight being in the range of approx. 1,000 to 5,000, preferably 1,000 to 3,000 and most conveniently 1,500 to 2,500, e.g. ca. 2000. The average molecular weight will generally be in the range of from 1,200 to 2,500, such as approx. 2000. Although other polyacrylates may sometimes be used in part in place of the described sodium polyacrylate, including other alkali metal polyacrylates, it is preferred that such replacements, when permitted, be limited to a minor portion of the material, and preferably the polyacrylate used will be sodium polyacrylate. These materials are available from Alco Chemical Corporation under the name "Alcosperse". The sodium polyacrylates can be obtained as clear decolorized liquids or powders which are completely soluble in water, the solutions having a solids content of approx. 25 - 40%, e.g. 30%, and where the pH of these solutions or of a 30% aqueous solution of the powder is in the range of approx. 7.0 - 9.5. Among these products, those currently marketed by Alco Chemical Corporation as "Alcosperse" 104, 107, 107D, 109 and 149 are preferred, of which "Alco-sperse" 107D, a powder with 100% solids, is much preferred, but "Alcosperse" 107, a 30% aqueous solution, can also be used instead with little difference in the result, both of which are sodium polyacrylates, the liquid (107) having a pH in the range of 8.5 to 9.5, and The pH of the powder (107D) is in the range 7.0 - 8.0 at a concentration of 30% in water.

The last mandatory component of the liquid detergents available is water. Normally, the hardness content of this water will be less than about. 300 ppm as CaCO 2, and preferably it will be less than 150 ppm. Often, it may be desirable to use deionized water, although tap water having less than 50 or 100 ppm hardness content will often be somewhat satisfactory. Harder water can be used successfully to prepare the present liquid cleansers, but it is believed that soft water is less likely to produce some harmful materials which could have an adverse effect on the appearance of the liquid.

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detergent and which could be unwanted deposited on the clothes during washing.

Various additives, both aesthetic and functional, can be found in the liquid cleansers, such as fluorescent brightening agents, perfumes and coloring agents. The fluorescent clearing agents include the well-known stilbene derivatives, including cotton and nylon clearing agents such as those traded under the trademark "Tinopal", e.g. 5BM. The perfumes used generally include essential oils, esters, aldehydes and / or alcohols, all of which are well known in the perfumery industry. The coloring agents may include dyes and water dispersible pigments of various types, including ultramarine blue. Due to the brightening effect due to the presence of the bentonite in the liquid detergent, the colors of the product can often be pleasing pastel colors. Titanium dioxide can be used to further brighten the color of the product or to make it white. Inorganic filler salts such as sodium sulfate and sodium chloride may be present, and so may agents for preventing the repositioning of debris such as sodium carboxymethyl cellulose, enzymes, bleaches, bactericides, fungicides, antifoaming agents such as silicones, antifoaming agents such as copolyesters, preservatives such as copolyesters, preservatives such as copolyesters. such as laurine myristine diethanolamide, and auxiliary solvents such as ethanol. Usually, the individual amounts of such additives will be less than 3%, often less than 1% and sometimes even less than 0.5%, with the exception of any fillers and solvents and additional detergents and builders for which the amounts are sometimes can be as high as 10%. The total amount of additives, including unspecified synthetic 30 detergents and builders, will normally be no more than 20% of the product and suitably less than 10% thereof, most conveniently less than 5% thereof. Of course, the additives used will not be detrimental to the washing and softening effects of the liquid detergent and will not promote the stability of the product upon standing. Neither will they cause 9

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producing harmful deposits on the laundry.

The amounts of the various components of the present liquid cleansers range from 5 to 15%, preferably 6-12% and most conveniently 8-10%, and most preferably about 9% of the 5 linear sodium higher alkylbenzenesulfonate, 1.5-5%, preferably 1.5-3% and more conveniently 1.7-2.7% and most conveniently approx. 2% of the sodium alkyl polyethoxy sulfate, 5 - 25%, preferably 9 - 22% and most preferably 12 - 19% builder salt, 5 - 20%, preferably 8 - 15%, most preferably 10 - 14% 10, and most preferably approx. 12% swelling bentonite, 0.05 - 0.5%, preferably 0.1 - 0.3%, more preferably 0.12 - 0.18% and most preferably 0.15% or approx. 0.15% sodium polyacrylate, and 40-75%, preferably 50-70% and most conveniently 55-70%, especially approx. 60% water.

When the builder salts are sodium tripolyphosphate and sodium carbonate, the amounts thereof will generally be from 7 to 15%, preferably 9 to 13%, and preferably approx. 11% of the tripolyphosphate, and 2 - 7%, preferably 3 - 6% and most conveniently approx. 4% sodium carbonate, with the ratio of tripolyphosphate to carbonate ranging from 2: 1 to 6: 1.

The liquid cleansers can be prepared by appropriately mixing the various components thereof, the bentonite being preferably added to a premix of most of the water with tripolyphosphate, carbonate, CMC and anionic detergent. For example, the polyphosphate and carbonate in finely divided form, usually sufficiently fine to pass a screen # 160, can be mixed with and dissolved in most of the water, after which CMC and anionic detergent can be mixed, followed by bentonite, polyacrylate and the residue of the components of the composition in any suitable order. The amount of retained water is added to the rest of the liquid detergent and causes the thickened liquid to be diluted to a desired viscosity.

Experience has shown that the desired amount of water to be retained and admixed at the end of the manufacturing process is usually 5-20% of the purified liquid purifier portion. eg. ca. 10% thereof.

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During mixing of the various components with the aqueous medium, and especially when the bentonite is added and the remaining water is mixed, it is important to keep the mixture moving, e.g. by continuous stirring. Preferably, the mixer is never stopped and the process is continuous and usually lasts 3 - 30 minutes per minute. party. The water can be heated to promote dissolution of the various components of the product and to promote dispersion of the bentonite, but this is not necessary and room temperature water, e.g. water at a temperature in the range of 15 - 30 ° C, e.g. 20-25 ° C can be used.

The viscosity of the present liquid detergent immediately after completion of the preparation is usually in the range of from about. 1,000 to 2,000 centipoise, e.g. ca. 1,500 centipoise.

The liquid detergent is intended for wrapping and dispensing from relatively narrow-necked glass or plastic bottles from which it can be poured immediately and after normal aging. When the polyacrylate is omitted from the composition, it has been found that initially industrially produced liquid detergent is thicker and becomes more viscous upon standing, so that its viscosity 20 after approx. a month's storage at room temperature may have grown from approx. 3,000 centipoise to over 18,000 centipoise. At 18,000 centipoise, the liquid detergent is too thick to be satisfactorily poured and requires the consumer to shake it or stir it to dilute it sufficiently so that it can be poured from the bottle. Clearly, such a thickening effect is undesirable. The preferred viscosity of the present liquid detergent is approx. 4,000 centipoise - 1,000 centipoise, and viscosities like these have proven to be the ones consumers prefer. Using the polyacrylate component and compositions of the invention, as exemplified in Example 1, it has been found that after ca. a month of storage, the viscosity has increased to approx. 4,000 centipoise (4,050 centipoise after 28 days), and further storage does not result in any significant additional viscosity increase. The 11

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described viscosities are measured using a Brookfield LVT viscometer using a spindle # 2 for viscosities less than 2,000 centipoise, a spindle # 3 for viscosities in the range of 2,000 - 9,000 centipoise and a spindle # 4 for viscosities greater than 9,000 centipoise. All viscosities are measured at 12 rpm. per minute and at 25 ° C.

The following examples illustrate the invention. Unless otherwise stated, all parts are by weight and all temperatures are in ° C.

EXAMPLE 1.

Components%

Linear sodium tridecylbenzenesulfonate 8.8

Sodium alkyl polyethoxy sulfate (alkyl = linear alkyl of 12-15 carbon atoms, polyethoxy * 3 ethoxy groups) 2.2 Pentane sodium tripolyphosphate 11.0

Sodium carbonate (anhydrous) 4.0

Sodium carboxymethyl cellulose 0.2

Sodium polyacrylate (average molecular weight = 2,000) 0.15

Titanium dioxide 0.5 Formalin 0.2

Bentonite (325 mesh, American Colloid Co., 325 "AEG") 12.0

Fluorescent Clearant ("Tinopal" LMS-X,

Ciba-Geigy) 0.3

Perfume 0.4 Dye ("Cl Acid Blue" 9 / CI 42090) 0.0045

Pigment ("Cl Pigment Blue" 29 / CI 77007) 0.04

Water (deionized) 60.2055 100.0 12

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Ca. 84% of the water volume of the agent is added to a suitable mixer, such as a vertical cylindrical tank equipped with heating and cooling means and connected to a discharge pump, and the quantities of polyphosphate and carbonate (with a particle size 5 passing screen No. 160 ) is added with stirring (with a Lightnin-type mixer), followed by CMC, and then the anionic detergents are added, after which the other components are mixed in any appropriate order. The rest of the water is added so that the mixture is diluted, and then 10 perfumes are added under mixing, and the product is prepared to be pumped out of the mixer and into the narrow-necked bottles intended for dispensing containers. During the mixing operation, which takes place at approx.

9 minutes, the added materials and the final product have a temperature of approx. 20 ° C. In some cases - in order to promote faster dissolution and faster dispensing of the components - the temperature of the water and the other components being filled may be raised to 40 - 50 ° C, so that the temperature of the final product may be approx. 30 - 40 ° C, in which case the mixing time can be reduced to approx. 5 or 6 minutes.

The resulting liquid detergent (at room temperature) has a viscosity of approx. 1,550 centipoise and can be poured satisfactorily from a plastic bottle with a discharge opening of approx. 2.5 cm.

It has a pH of approx. 10.5. The liquid cleanser is used to wash a mixed load of dirty laundry, some of which includes cotton pieces and polyester / cotton pieces that are soiled with particulate dirt and with grease dirt.

The liquid detergent is added to the tub in a standard washing machine, using approx. 1/2 cup of the liquid cleanser-30 per. washing (so that the concentration of liquid detergent in the washing water becomes about 0.18%). The temperature of the wash water is 21 ° C (to test the washability of the product in cold water), and the water has a mixed calcium and magnesium hardness of approx. 150 ppm as CaCO 2. After washing the laundry and test pieces 13

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they are either dried on a leash or machine dried (in a conventional laundry dryer).

The same operations as described above are repeated with a control cleaner from which the sodium polyacrylate is omitted and 5 is replaced with water.

Both test agents (the polyacrylate containing) and the control agent are excellent fabric softeners, but the test product is far superior in terms of one important property, namely maintaining a satisfactory viscosity upon storage. Thus, after 5 days, the viscosity of the test product is 2,580 centipoise, whereas the viscosity of the control is 9,400 centipoise. After 14 days, the viscosities are 3,400 centipoise and 13,500 centipoise, respectively, after 21 days the viscosities are 3,500 centipoise and 14,500 centipoise, and after 28 days 15 they are 4,050 and 18,500 centipoise, respectively. At 4,050 centipoise, the product is still pourable from the bottle, but at 18,500 centipoise it is not pourable and must be shaken or stirred to dispense. Not later than 28 days after manufacture, the viscosity of the test composition does not increase appreciably, and any increase in the viscosity of the control is of no greater importance since the product at more than 18,000 centipoise is nonetheless unsalable.

From the experiment, it is clearly seen that the presence of a very small amount of sodium polyacrylate significantly helps to stabilize the viscosity of the described cleaning agents upon storage, which effect has not been previously recognized.

The liquid test cleaner has an appealing uniform light blue appearance and does not differ by storage in different layers of materials.

30 In addition to being useful as a detergent for machine washing, 14 can be used

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The fabric according to the invention is used for hand washing of laundry and as a liquid for pre-treating extremely dirty areas of laundry, By hand washing of laundry, to promote maximum deposition of bentonite on the laundry and thereby improving the softening effects, the washing solution is allowed to drain out of the wash tub through a bottom drain so that it passes through the laundry, after which the laundry can be rinsed in the normal manner. Used as a pretreatment for dirty areas of laundry, the liquid detergent is preferably used at full strength (although dilutions can also be used) on dirty areas and rubbed into them. During such application and rubbing, the bentonite supports the detergent in loosening and removing the dirt, whether oily or particulate, and at the same time some of the bentonite adheres to the fibers in the laundry, thus helping to soften the laundry in such places. Such a softening of the material can contribute to less soiling of the area and less retention of dirt in the future, especially when the soiled areas are shirt cuffs or flaps.

EXAMPLE 2.

A liquid cleaner such as that of Example 1 is used using 9% of a linear dodecylbenzenesulfonate instead of the 8.8% linear tridecylbenzenesulfonate, 2% sodium alkyl polyethoxy sulfate, wherein the alkyl has 12-13 carbon atoms, 25 and polyethoxy has on average 6.5 ethoxy groups instead of the previously used 2.2% y, moreover 0.2% "Alcosperse" 107 (based on solid content) instead of "Alcosperse" 107D (used in Example 1), 11% STPP, 6% sodium carbonate, 15% bentonite (Mineral Colloid 101), the aforementioned additives and 55.7% tap water with a hardness of 100 ppm as CaCO

The additional sodium carbonate improves the miscibility of the various components during manufacture, and the exchange of 15

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the detergents have no known detrimental effect on the properties of the product. The product is prepared essentially in the same manner as previously described.

The liquid detergent is a stable pourable liquid having the desirable cleaning and softening properties described for the liquid detergent of Example 1, whether used for machine washing or hand washing of laundry or for pre-treatment thereof. The viscosity does not exceed 5,000 centipoises after one month of storage at room temperature.

Similarly, acceptable liquid cleansers are prepared when 3% sodium lauryl alcohol sulfate, 2% "Neodol" 23-6.5, and 0.5% silicone as antifoam oil are incorporated into the product by addition of the components of Example 1 (replacing water). When sodium citrate or potassium nitrate is used to replace the sodium carbonate (or when only partially substituting these materials, e.g., 30% replacement, with such citrates or trisodium nitrilotriacetate), useful liquid cleansers having desirable properties such as previously described agents.

EXAMPLE 3.

A liquid detergent such as that in Example 1 is prepared, but only 2% sodium carbonate is used in the composition, the water content being increased accordingly. Although the sodium carbonate content is reduced, the mixture can still be processed into a final product with desirable properties useful in powerful laundry detergents for washing cotton and synthetic materials and for softening them, and it is also useful as a pretreatment for such laundry. . When 0.5% sodium carboxymethylcellulose is added to the composition instead of a portion of the water, improved whitening of the laundry is achieved without significant loss of

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16 softening ability due to CMC1's ability to prevent re-deposition of dirt.

When in other variations of the invention the amounts of the various components of the liquid detergent in Example 1 change - 10% or - 20% / without going beyond the ranges / indicated in the present description, stable pourable liquid cleansers with useful cleansing and softening effects. In some products, it may be desirable to include as much as 10% Zeolite A or up to 4% sodium-10 silicate with a ratio of Na 2 O: SiO 2 of approx. 1: 2.4, although the silicate will often be avoided and if the zeolite is present to avoid deposition of aggregates of zeolite and silicate or reaction products thereof, the silicate will normally be omitted.

As will be seen from the foregoing description and examples, the fabric softening powerful liquid cleaners of the invention are stable, uniform, attractive and functional. Despite the presence of a substantial amount of gelling agent (bentonite) in a liquid medium, they do not form harmful gels and remain pourable during storage. Despite prolonged storage, during which the suspended bentonite is subjected to intimate contact with surfactants and inorganic builder salts in an aqueous medium, the bentonite does not agglomerate and its softening effect on laundry is not destroyed.

By using said detergents and builders in an aqueous medium which also contains sodium polyacrylate, a liquid detergent is obtained which, despite the content of a substantial amount of bentonite of the swelling type, remains liquid and pourable and retains its physical and chemical properties. which allows it to be deposited on the laundry and act as a lubricant for the fibers thereby promoting softening of the laundry.

The use of the liquid medium also avoids, as mentioned earlier, the possibility that the bentonite could be deactivated by overheating as in a spray drying tower.

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In addition to being useful as machine wash and hand washing products, the present liquid cleansers are also good for pretreating stained parts of laundry, whereby treatments are believed to have bentonite content in removing stains and softening the stains. spotty areas (and the product is also used afterwards for washing purposes). Thus, from the foregoing mention of the features and advantages of the present invention, it will be seen that it represents a significant advance in the cleaning technique because it allows convenient use of a non-gelling liquid detergent to both cleanse and soften laundry ( and pre-treating it) while employing excellent synthetic organic detergents and it is not necessary to incorporate with these anionic detergents chemically harmful reactive cationic materials, such as quaternary ammonium salts, to soften. Furthermore, the bentonites are not ecologically harmful as the quaternary ammonium salts could be, and do not cause the build-up of harmful fatty deposits on the laundry, which can often make it appear discolored, as the quaternary compounds sometimes do.

The sodium salts and sodium compounds of the various components of the present liquid detergents have been described because they are particularly satisfactory and industrially available, but the corresponding potassium compounds can be used instead, at least in part, and are also within the scope of the invention. Thus, potassium detergents, potassium builder salts and potassium bentonites and potassium forms of additive salts can be used, and these should be included together with sodium compounds as "alkali metal" compounds in the compositions listed.

Claims (5)

1. Fabric softening powerful liquid detergent having a density in the range of 1.15 - 1.35 g / ml at room temperature, a pH in the range of 9.5 - 11 and a viscosity in the range of 1,000 - 5,000 centipoise which does not increase to more than 6,000 centipoise at 30 days of quiet storage at room temperature, comprising 5-15% linear or branched alkali metal higher alkyl benzenesulfonate wherein the right alkyl has 10-16 carbon atoms, 1.5-5% alkali metal alkylpo -lyethoxy sulfate wherein the alkyl has 10 to 16 carbon atoms and polyethoxy has 2-11 ethylene oxide groups, 5 - 25% water soluble builder salt, 5 - 20% of a swelling bentonite and 40 - 75% water, characterized in that it contains 0.05 - 0.5% of a water-soluble polyacrylate having an average molecular weight in the range of 1,000 - 5,000. High-performance liquid detergent according to claim 1, wherein 20 viscosity does not rise to more than 5,000 centipoise at 30 days of calm storage at room temperature, characterized in that it comprises 6-12% linearly higher sodium alkylbenzene sulfonate wherein the higher alkyl has 12 15 carbon atoms, 1.5-3% sodium alkyl polyethoxy sulfate, wherein the alkyl has 12-25 16 carbon atoms and the polyethoxy has 2-7 ethylene oxide groups, 7-15% sodium tripolyphosphate, 2-7% sodium carbonate, 8-15% comminuted bentonite, 0, 1 - 0.3% sodium polyacrylate having an average molecular weight in the range of 1,000-3,000 and 50-70% water. 30 Liquid detergent according to claim 2, characterized in that it comprises 8-10% linearly higher sodium alkylbenzenesulfonate having 12-13 carbon atoms in the alkyl group, 1.7-2.7% sodium alkyl polyethoxy sulfate wherein the alkyl has 12-15 carbon atoms, and the polyethoxy has 3-5 ethylene oxide groups, 9-13% sodium tripolyphosphate, 3-6% sodium carbonate, 10-14% finely divided bentonite with a dry, swollen particle size of DK 163308 B less than 44 microns (No. 325 US Sieve Series), 0 , 12 - 0.18% sodium polyacrylate having an average molecular weight in the range 1,500 - 2,500 and 55 - 70% water. Liquid detergent according to claim 3, characterized in that it comprises approx. 9% linear sodium tridecylbenzenesulfonate, approx. 2% sodium alkyl polyethoxy sulfate wherein the alkyl has 12 to 15 carbon atoms and the polyethoxy has approx. 3 ethylene oxide groups, approx. 11% sodium tripolyphosphate, approx. 4% sodium carbo-10 night, approx. 12% bentonite, approx. 0.15% sodium polyacrylate having an average molecular weight of approx. 2,000 and approx. 60% water. Liquid detergent according to claim 4, characterized in that it further comprises approx. 0.2% sodium carboxymethyl cellulose and approx. 0.2% formalin and wherein the water is deionized water, the density is approx. 1.25 g / ml and the pH is approx. 10.5. 20 25 30 35