MXPA06015110A

MXPA06015110A - Stable nonaqueous bleaching detergent composition dispersion.

Info

Publication number: MXPA06015110A
Application number: MXPA06015110A
Authority: MX
Inventors: Ebert Ids Baars; Lali Pataridze; William Edward Simpson
Original assignee: Johnson Diversey Inc
Priority date: 2004-07-06
Filing date: 2005-06-15
Publication date: 2007-03-27
Also published as: US20080263778A1; CN100577786C; JP2008506005A; CA2572500A1; KR20070028521A; WO2006014223A1; CN1977037A; BRPI0512726A; EP1778827A1; EP1614741A1; AU2005270162A1

Abstract

The invention pertains to a nonaqueous bleaching detergent composition comprising: a) a solid bleaching agent in an amount from 20% to 85% by weight, said solid bleaching agent being a hypochlorite-liberating agent, b) a thickening agent in an amount from 0.1 to 10% by weight, wherein the thickening agent is a mixture of clay and polymer in a ratio of clay:polymer of 1:10 to 10:1, c)a thickening agent activator in an amount of up to 0.3% by weight, d) an auxiliary compound in an amount from 0 to 23% by weight, and e) a nonaqueous liquid in an amount of at least 14.9% by weight which is chemically inert to the bleaching agent and wherein the solubility of the bleaching agent is less than 10 mg/l, said nonaqueous liquid being selected from vegetable oils, mineral oils, synthetic oils, or animal oils including fish oils, and admixtures thereof.

Description

COMPOSITION STABLE NON-AQUEOUS WHITENING DETERGENT IN DISPERSION BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-aqueous bleaching detergent composition comprising a dispersion, a method for manufacturing said composition and a closed package containing the same. 2. Description of the Prior Art Commercially available detergents for washing machines and for dish washing applications provided in powder or in mixture, or in liquid form, have the disadvantage of not being stable in high concentrations. Stable non-aqueous bleaching detergent compositions have been developed, for example, the composition of U.S. Patent No. 5,164,106, which discloses a dishwashing detergent composition that exhibits improved cleaning performance against difficult to remove dirt. The content of this patent referred to a stable non-aqueous liquid composition, containing a dual bleaching system for use in an automatic dishwasher for cleaning dishes, glassware, kitchenware and the like. It includes a non-aqueous bleaching detergent composition containing a dispersion of a carrier liquid, a bleaching agent selected from a hypochlorite releasing compound, a non-aqueous detergency builder salt, sodium silicate, alkali metal carbonate and a bromine compound. Typical bleaching compositions contain an amount to provide 0.5 to 10% chlorine, corresponding to the use of hypochlorite releasing compounds of 1 to 18% by weight, and preferably 2 to 12% by weight. According to the concentrations of the examples of the bleaching agent, 2.5 to 5.36% by weight can be obtained. Aqueous bleaching compositions are known in the art. For example, in U.S. Patent No. 4,992, 194. This patent discloses a method in which a non-aqueous peroxide acid is kept insoluble in water by using a low pH. With higher pH the peroxide acid dissolves and therefore becomes inactivated. The disadvantage of this method is the restricted number of suitable peroxide acids. In fact, some of the few acids that can be used according to this method of previous work are the compounds of the PAP group (phthaloylaminoperoxocaproic acids). This method, therefore, certainly can not be applied generally. BRIEF DESCRIPTION OF THE INVENTION It was found that the compositions of U.S. Patent No. 5,164,106 are not stable in bleaching agent amounts above 18% by weight. This is a considerable problem, since there is a need for more concentrated bleaching compositions, which are effective for protein and starchy carbohydrate soils, and stains difficult to remove in laundry, and which are also effective for cleaning hard surfaces in CI P (cleaned on site), such as the food and beverage industry. For economic reasons it is particularly important to obtain compositions that are stable enough to be stored for longer periods of time and at higher temperatures. The latter is of particular importance when using bleaching agents that generate oxygen, since in their decomposition they can release oxygen, or chlorine in the case of hypochlorite releasing agents. In general, bleaching agents that include agents that release peroxide and hypochlorite finally release oxygen, and the decomposition of the bleaching agent will lead to a decrease in activity and an increase in oxygen pressure (in non-vented packaging), which can lead to to dangerous conditions when stored in bottles and other types of packaging (not ventilated), which are opened after decomposition has begun. Therefore there is a need for stable dispersions containing much higher concentrations of bleaching agent than those known in the art. An objective of the present invention is to obtain a stable dispersion containing at least 20% by weight, preferably about 40% by weight or more of a bleaching agent, which can be selected from a large group of bleaching agents, particularly of oxygen-liberating bleaching agents. It is also another object of the present invention that said compositions can be packaged and stored for long periods of time without their decomposition or oxygen formation occurring. The problem to be solved is the formulation of a concentrated non-aqueous liquid detergent composition that is stable in storage and effective as chlorine in automatic dishwashing, laundry and other whitening applications. In particular, the composition should easily remove stains of coffee, tea and wine. Typical stains, such as those caused by blood, starch and protein should also be removed easily. The composition should be made in substantially higher concentrations than in the compositions known in previous works of the material, but at the same time maintain stability under long-term storage conditions. Another object of the present invention is to provide a concentrated non-aqueous liquid detergent composition which is stable under storage conditions, which does not degrade or decompose (even at elevated temperatures), spills easily and disperses easily in water of washing. The present invention is directed to a non-aqueous bleaching detergent composition containing a dispersion of: a) a solid bleaching agent in an amount of 20 to 85% by weight, said solid bleaching agent is a hypochlorite releasing agent, b) an agent thickener in an amount from 0.1 to 10% by weight, which is a mixture of clay and polymer in a clay: polymer ratio of 1: 10 to 10: 1, c) a thickening agent activator in an amount of 0 to 0. 3% by weight, d) an auxiliary compound in an amount of 0 to 23% by weight, and e) a non-aqueous liquid in an amount of at least 14.9% by weight, which is chemically inert with respect to the bleaching agent and also the The solubility of the bleaching agent is less than 10 mg / L, said non-aqueous liquid is selected from among vegetable oils, mineral oils, synthetic oils or animal oils, including fish oils, and mixtures thereof. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS It was found that the compositions according to the present invention are stable for at least 6 months, usually for at least 1 year, and in most cases for an unlimited period of time, and yet They contain a highly concentrated bleaching agent. It is possible to obtain stable compositions having from 25 to 50%, preferably from 35 to 45% by weight of bleaching agent. Compositions within the preferred range, ie, those containing 35 to 45% by weight of bleaching agent, can be used in conventional washing machines, dishwashers and the like. At higher concentrations, particularly those close to 85% by weight, the compositions become more viscous but can be used in adapted machines that use higher pressures to pump the bleaching composition. Concentrations greater than 85% by weight are possible, but due to the substantial increase in viscosity, they are not commercially useful. Surprisingly, the compositions of this invention can be used for liquid automatic dishwashing detergent compositions that have improved cleaning performance in protein and carbohydrate spots in automatic dishwashing, and in coffee, tea and wine stains in textile washing . They can also be used in the food and beverage industry to clean hard surfaces. More generally, chlorine can be used as a stain remover, but also for sanitary purposes in dishwashing or laundry. The liquid detergent composition contains a source of chlorine, particularly a source of chlorine that generates oxygen, and more particularly contains a source of hypochlorite. The present invention relates specifically to concentrated liquid detergent compositions for automatic dishwashing that have improved cleaning performance against protein stains or starchy carbohydrates in tableware, glassware, kitchenware and the like, particularly stains that have been cooked or baked , and improved cleaning capacity for coffee, tea and wine stains. Said stains are removed in laundry applications. The non-aqueous liquid compositions are stable in storage, do not settle, preferably are fluid and rapidly disperse in water. The non-aqueous liquid detergent compositions of the present invention have the advantage of being stable, of not settling and of not forming gels during storage, and they are rapidly dispersed in washing machines (dishwashers). The preferred liquid compositions of the present invention are easily poured, easily measured and easily placed into the washing machine (dishwasher) and quickly dispersed in the washing water in washing machines (dishwashers). These and other objects of the invention will be better understood from the following detailed description of the invention and preferred embodiments thereof. According to the present invention there is provided a liquid and non-aqueous automatic dishwashing detergent composition, which includes at least one bleaching agent, preferably selected from an oxygen generating compound, a thickener element, a non-aqueous liquid and optionally a thickener agent activator, as well as auxiliary compound (s). The term "non-aqueous", throughout this invention, means a composition or liquid containing less than 5% by weight of free water. Therefore, the compositions and liquids of the invention, at most contain only minor amounts of free water, and preferably contain no free water at all. The present invention further provides a method for cleaning tableware, glassware and kitchenware in a homemade automatic or industrial dishwashing machine, and a method for cleaning laundry in a washing machine by means of an aqueous washing bath containing an effective amount of the laundry. non-aqueous liquid composition described above. According to this aspect of the present invention, the composition is stable in storage, can be easily measured, and can be poured and dispersed rapidly in automatic dishwashing machines. 1. Bleaching agents Oxygen-generating compounds suitable for use in bleaching compositions are those water-soluble solid materials that generate oxygen when they come into contact with water or dissolve in it. Said oxygen release can be obtained by direct oxygen release or by release by means of hypochlorite, hypobromite, hypohyde, ozone, perhydroxy ions or halodioxide ions, such as chlorodioxide. Examples of solid bleaching agents are heterocyclic n-halomides in particles, such as trihalocyanuric acid, dihalocyanuric acid and salts thereof, such as sodium and potassium dihalocyanurate, wherein the term "halo" means chlorine, bromine or iodine. The preferred halo group is chlorine. The corresponding dihaloisocyanuric and trihaloisocyanic acid salts can also be used. Other N-haloimides can be used, such as N-halosuccinimide, N-halomalonimide, N-halophthalimide and N-halonaphthalimide. Additional suitable N-haloroimides are hydantoins such as 1,3-dihalo-5,5-dimethylhydantoin; N-monohalo-C, C-dimethylhydantoin; methylene-bis- (N-halo-C, C-dimethylhydantoin); 1,3-dihalo-5-methyl-5-isobutylhydantoin; 1,3-dihalo-5-methyl-5-ethylhydantoin; 1,3-dihalo-5,5-diisobutylhydantoin; 1,3-dihalo-5-methyl-5-n-amylhydantoin and the like. Preferred solid bleaching agents are hypochlorite releasing agents. Useful hypochlorite releasing agents are trichloromelamine and particulate, dry, water soluble anhydrous inorganic salts, such as calcium and lithium hypochlorite. The hypochlorite releasing agent can, if desired, be a stable, solid or hydrate complex, such as sodium p-toluene-sulfo-chloramine trihydrate (chloramine T), sodium benzene-sulfo-chloramine dihydrate, calcium hypochlorite tetrahydrate or chlorinated trisodium phosphate containing 0.5 to 4% available chlorine, produced by the combination of trisodium phosphate in its normal form of Na3PO4.12H2O and an alkali metal hypochlorite (eg, sodium hypochlorite). In addition to potassium, sodium and calcium, other salts may be used, such as lithium, magnesium and ammonium salts. In compositions in which the alkali metal or alkaline earth metal hypochlorites are used as a source of chlorine, these compounds can be used in the form of anhydrous dispersed solids in order to prevent deterioration of the nonionic surfactants in the composition. Preferred sources of hypochlorite are dichloro- and trichloro-isocyanurates and chloramine T (p-toluenesulfochloramine). The source of hydrogen peroxide is selected from the group percarbonate, persilicate, persulfate, perborate, peroxyacids, dialkyl peroxides, diacyl peroxides, preformed percarboxylic acids, non-aqueous peroxides, inorganic peroxides, hydroperoxides and mixtures thereof. Specific examples include peroxyforic acid, peroxyacetic acid, monoperftalate, monoperoxysuccinate, monoperoxysulfate, monoperoxyphosphate, peroxyoctanoic acid, peroxybenzoic acid, ethylperoxycarbonic acid, phthalimidoperoxyhexanoic acid, sodium perborate and sodium percarbonate. Typically, the oxygen generating agents are employed in a proportion of from about 20 to 85% by weight of the composition, preferably from about 25 to 50%, and more preferably from 35 to 45% by weight. It was found that the best dispersions were obtained with solid bleaching agents having a particle size of less than 400 μm, preferably from 10 to 200 μm, more preferably from 30 to 1 μm. According to the examples, the bleaching particles have a particle size of about 70 μm. 2. Thickening Agents The composition further includes conventional thickening agents in amounts of 0.1 to 10% by weight, to obtain a product consistency similar to that of a cream or paste. Thickeners, i.e. suspending thickening agents that provide thickening properties, are known in the art, and can be water soluble or insoluble, dispersible or colloid, monomeric or polymeric formers and must of course be stable in these compositions, for example, stable with alkalinity and whitening agents, such as sodium hypochlorite and peroxide. Preferred thickeners generally comprise the inorganic and colloid-forming clays of the smectite and / or attapulgite type. These materials are generally used in amounts from about 1.5 to 10% by weight. Preferably from 2 to 5% by weight, to provide the desired thickening properties to the formulation. Smectite clays include montmorillonite (bentonite), hectorite, attapulgite, smectite, saponite and the like. Montmorillonite clays are preferred and are available under trade names such as Tixogel® MP100, Tixogel® VP, Tixogel® MIÓ from Sud-chemie, Bentone® 34, Bentone® Gel, Bentone® SD-1 from Water Ingredients, Thixogel® No .1 and Gelwhite® GP, H, etc. , from Georgia Kaolin Company; and ECCAGUM® GP, H, etc., of Georgia Kaolin Company; and ECCAGUM GP, H, etc., from Luthern Clay Products. Attapulgite clays include materials commercially available under the brand name Attagel ®, ie Attagel® 40, Attagel® 50 and Attagel® 150 from Engelhard Minerals and Chemicals Corporation. Attacks of smectite and attapulgite are also useful in ratios of 4: 1 to 1: 5. Thickening or suspending agents of the aforementioned types are well known in the art, being described, for example, in U.S. Patent No. 3,985,668, incorporated herein by reference. The preferred clays are organically modified bentonite, organically modified smectite and synthetic fruit. Conventionally used organic polymeric thickeners, such as polyacrylates, for example powdered polyacrylates having a molecular weight of 1,000 to 20,000 can be used. Suitable polyacrylates, for example sodium, are Alcosperse® 130D, MW 15,000 available from Aleo Chem. Co., Alcosperse®149D, MW2000, available from Aleo Chem. Co. and Alcrysol® 45N, MW 4,500, available from Rohm & Haas Co., Polymer WSP 10 (butene copolymer), WSP 01 (SE / P block copolymer (styrene / ethylene oxide / propylene oxide)), WSP 52 (styrene / ethylene / butylene triblock polymer), WSP 50 (styrene-ethylene / butylene-styrene triblock copolymer), WSP 22 (polybutene), PEO-1 (polyethylene oxide) from Water Ingredients. The composition preferably contains from 0.1 to 6%, preferably from 1 to 4%, more preferably from 2 to 3% by weight of thickening agent. It was further discovered that apart from the chemical stability obtained with these compositions, high physical stability (ie, stable dispersions without phase separation) can also be obtained when a mixture of a clay and a polymer was used as a thickening agent. Such mixtures are effective to increase physical stability when the ratio of clay: polymer is from 1: 10 to 10: 1, preferably from 1: 3 to 2: 1. More preferably, these mixtures are used in combination with paraffin oil as a non-aqueous liquid (see below). 3. Thickening Agent Activator The compositions may contain up to 0.3% by weight of a thickening agent activator. Such activators improve the dispersion properties of clay thickening agents, and are well known in the art. Activators suitable for use with clays include lower alcohols, such as ethanol, and propylene carbonate. 4. Auxiliary compounds The composition can also contain up to 23% by weight of an auxiliary compound. Auxiliary compounds are, for example, detergents for reducing surface tension, detergency builder salts such as phosphates, silicates and carbonates, foam inhibitors, perfumes, gloss enhancers, dyes, sequestering agents, and the like. The surfactants that can be used are diphenylic oxides of linear or branched mono- and / or di-alkyl of 8 to 14 carbon atoms of alkali metals, which are commercially available, for example, as DOWFAX® 3B-2 and DOWFAX ® 2A-1. Other suitable surfactants include the primary alkyl sulfates, alkyl sulfonates, alkylaryl sulphates, sec-alkyl sulfates, alkyl phosphonates. Examples include sodium alkyl sulfates of 1 0 to 1 8 carbon atoms such as sodium dodecyl sulfate; sulfonates sodium alkyls of 1 0 to 1 8 carbon atoms, such as sodium 1-hexadecyl sulfonate, and sodium alkylbenzene sulfonates of 1 to 18 carbon atoms, such as sodium dodecylbenzene sulfonates. The corresponding potassium salts can also be used. Sodium carbonate can be added as a detergency builder salt to act as a retarder to maintain the desired pH level. The compositions of the present invention may also contain inorganic builder salts such as NaTPP or organic builder salts., such as the alkali metal salts of polycarboxylic acids. A preferred inorganic detergency builder salt is an alkali metal polyphosphate such as sodium tripolyphosphate (TPP). One or more detergent builder salts can be used instead of all or a portion of the alkali metal polyphosphate. Other suitable builder salts are alkali metal borates, phosphates and hydrogencarbonates. Specific examples of said builder salts are sodium tetraborate, sodium pyrophosphate, potassium pyrophosphate, sodium bicarbonate, sodium hexametaphosphate, sodium sesquicarbonate, sodium mono- and di-orthophosphate, potassium bicarbonate, and sodium or potassium zeolites. Since the compositions of this invention are generally highly concentrated, and therefore can be used in relatively low doses, it is desirable to supplement any phosphatized detergent builder (such as sodium tripolyphosphate) with an auxiliary builder, such as an alkali metal polycarboxylic acid. Suitable alkali metal polycarboxylic acids are alkali metal salts of citric and tartaric acid, for example, monosodium citrate (anhydrous) and disodium. Sodium salts of citric and tartaric acids are preferred. The addition of foam inhibitors is important to increase the efficiency of the dishwashing machine and minimize the destabilizing effects that may occur due to the presence of excess foam inside the washing machine during use. The foam can be sufficiently reduced by appropriate selection of the type and / or amount of detergent active material, which is the main component in the production of foam. The degree of foam is also somewhat dependent on the hardness of the washing water inside the machine, so the proper adjustment of the proportions of NaTPP, which has a water softening effect, can help to provide the degree of inhibition of desired foam. However, it is generally chosen to include a stable chlorinated bleach foam depressant or inhibitor. Particularly effective are the alkyl esters of phosphonic acid, which are available, for example, from BASF-Wyandotte (PCUK-PAE), and the acid phosphate alkali esters which are available, for example, from Hooker (SAP) and Knapsack ( LPKN-1 58). Other foam inhibitors that can be used include, for example, the known silicones, such as Dow Corning 1400 and 1500, which are polysiloxanes mixed with dispersed silica. Alkali metal silicates, for example, sodium silicate, which provide alkalinity and protection from hard surfaces, such as fine porcelain can also be used. The sodium silicate also protects the washing machine against corrosion. The preferred silicates are sodium disilicate and sodium metasilicate. Most of the components of the composition can be added to the non-aqueous liquid composition in the form of dry powders or dispersions or non-aqueous solutions. Sequestering agents can be used in larger amounts when necessary. Preferred sequestering agents are compounds that have a strong complex formation with calcium and magnesium or that have bonds thereto. Most preferred are the sodium or potassium salts of NTA (nitrilotriacetic acid), MGDA (methylglycine diacetic acid), EDTA (ethylenediaminetetraacetic acid) and (S, S) - EDDS (ethylenediamine-N. N'-disuccinic acid) or mixtures of these . Preferred amounts of the sequestering agent accumulate up to 10 to 23% by weight. Many other conventional ingredients may be included in these compositions in small amounts, generally less than about 4% by weight, such as perfume and hydrotropic agents, preservatives, brightness enhancers, dyes, pigments and the like, all being stable with respect to the chlorine bleaching agent. and high alkalinity (properties of many of the components). For coloring, chlorinated phthalocyanines and aminosilicate polysulphides are especially preferred., which provide, respectively, pleasant green and blue tints. 5. Non-Aqueous Lugs Non-aqueous liquids that may be used in accordance with the present invention are in general vegetable oils, mineral oils, synthetic oils or animal oils, including fish oils, and mixtures thereof. Specific but not exhaustive examples are paraffin oil, coconut oil, salad oil and olive oil. The non-aqueous liquids described above may be used on their own or in mixtures in order to obtain desired viscosity and stability in the liquid product. It may be preferred to use a non-aqueous liquid that is a mixture of at least two liquids. Preferred mixtures contain, in addition to the liquids mentioned above, from 0.1 to 5% by weight of a saturated or unsaturated fatty acid having from 12 to 24 carbon atoms as a co-liquid. Examples of such co-liquids are, for example, silicone oil, lower alkanes such as hexanes, octanes, methyl esters of soybean oil (for example, Steposol® SB-W), methyl soyate / lactate ethyl (Steposol® SC), isobutyl ester (Rodiasolve® DIB, ex Rhodia), and other types of liquids, such as ethylene glycol ethers. The components dissolve only partially or do not dissolve at all in the liquids and co-liquids, and form an emulsion or suspension in the liquid. The compositions of the present invention exhibit good viscosity and stability characteristics, and remain stable at room temperature and higher, and it is possible to pour them at low temperatures. A particularly useful composition contains from 35 to 45% by weight of solid sodium dihalocyanuric acid (NaDCCA) with a particle size of approximately 60 to 80 μm, 0.5 to 3% by weight of a clay thickener such as Tixogel® MP100, 0.02 to 0.04% by weight of ethanol and 64.48 to 51.96% by weight up to 100% by weight of paraffin oil. It was found that the stability is excellent in the sense that oxygen formations did not occur. The stability of the compositions of the invention is expressed as less than 5% in the decrease of the activity of the bleaching agent after 6 months of storage at 40 ° C, measured by titration according to ASTM D 2022. For that reason The composition can be stored in closed packages for months under normal storage conditions between 0 and 40 ° C. It is then also an object of the invention to obtain stable packages (or containers) in storage containing the composition of the invention. Method of preparing the liquid composition The compositions of the present invention can be prepared by conventional means. In a suitable form for making the compositions of the present invention the method comprises the steps of: i) working at high temperature a pre-gel from a polymer and a non-aqueous liquid, which is chemically inert with respect to the agent bleach and the solubility of the bleaching agent is less than 10 mg / l: ii) make a pre-gel from a clay, non-aqueous liquid and, optionally, a thickening agent activator, in a high shear mixer; iii) adding under stirring the pre-gel of ii) to the pre-gel of i) and adding a solid bleaching agent and, optionally, an auxiliary compound. The suitable elevated temperatures which are used in step i) are above 100 ° C, preferably at about 150 ° C. The high shear mixers that are used in step ii) are known in the art and comprise mixtures such as Silverson, ULTRA TURRAX T25 and Heidolph DIAX 600. The invention can be practiced in various forms and a number of embodiments will be described. specific for the purpose of illustrating the invention. The viscosity profile was determined for a structured liquid containing 55% paraffin oil, 3% fractionated coconut oil, 2% Tixogel® MP100 and 40% sodium dichloroisocyanuric acid (NaDCCA). The following examples of formulations according to the invention illustrate it, and are not intended to restrict it. Pre-gel polymer Pre-gel (WSP01): A mixture of 96% by weight of paraffin oil and 4% by weight of WSP®01 (styrene-ethylene / propylene block copolymer, ex Water Ingredients, Zeist, Netherlands) and heated above 160 ° C for approximately 60 minutes. After the WSP01 was completely dissolved, the mixture was allowed to cool while stirring. The WSP 50 pre-gel was made according to the procedure mentioned above, in which 99% by weight is paraffin oil and 1% by weight is WSP®50 (triblock polymer styrene-ethylene / butylene-styrene, ex Water Ingredients, Zeist, The Netherlands). The solution was stirred and heated above 1 60 ° C for about 60 minutes. After the WSP50 was completely dissolved, the mixture was allowed to cool while stirring. Clay pre-gel A mixture of 88% by weight paraffin oil and 10% by weight of Tixogel® MP1 00 (ex Sud-Chemie, Munich, Germany) was placed in a plastic beaker and stirred with a mixer of high shear stress (Ultra Turrax) for 5 to 10 minutes (speed: 1 6,000 rpm), after which 2% by weight of ethanol was added to the mixture and stirred with the same high shear mixer during another 1 0 minutes at 1 6,000 rpm. Procedure The paraffin oil (32.5%) and the clay pre-gel (15%) were mixed for 5 minutes, after which the pre-gel polymer was added and the mixing was continued for a further 20 minutes. Then NaDCCA powder (40%) (ex Clearon, Terneuzen, The Netherlands) was added and the mixture was stirred for 30 minutes. Formulations The following formulations were prepared according to the invention. A) 50% Pre-gel WSP 01 + 10% Pre-gel MP 1 00 + 40% NaDCCA B) 45% Pre-gel WSP 01 + 15% Pre-gel MP 1 00 + 40% NaDCCA C) 32.5% Paraffin oil + 15% Pre-gel MP 100 + 12.5% Pre-gel WSP 01 + 40% NaDCCA D) 42.5 Paraffin oil + 15% Pre-gel MP 100 + 12.5% of Pre-gel WSP 01 + 30% NaDCCA E) 57% Paraffin oil + 2% Pre-gel WSP 01 + 1% Pre-gel MP 100 + 40% NaDCCA F) 58% Paraffin oil + 0.5% Pre-gel WSP 50 + 1 .5% Pre-gel MP 100 + 40% NaDCCA. The compositions mentioned above were tested for stability by measuring phase separation as follows. The products were placed inside a measuring cylinder and kept at 40 ° C for 40 days. The volume of the separated oil was read on the measurement rods and expressed as a percentage of the total volume. None of the compositions of the invention showed phase separation (oil volume of 0%), whereas comparison compositions made only from the clay pre-gel showed substantial phase separation (oil volume in the range of 5%). to 15%).

Claims

1. A non-aqueous bleaching detergent composition containing a dispersion of: a) a solid bleaching agent in an amount of 20 to 85% by weight, said solid bleaching agent is a hypochlorite releasing agent, b) a thickening agent in an amount from 0.1 to 10% by weight, which is a mixture of clay and polymer in a clay: polymer ratio of 1. : 10 to 10: 1, c) a thickener agent activator in an amount of 0 to 0.3% by weight, d) an auxiliary compound in an amount of 0 to 23% by weight, and e) a non-aqueous liquid in an amount of at least 14.9% by weight, which is chemically inert with respect to the bleaching agent and furthermore the solubility of the bleaching agent is less than 10 mg / L, said non-aqueous liquid is selected from among vegetable oils, mineral oils, synthetic oils or oils animals, including fish oils, and mixtures of these.

2. The bleaching detergent composition of claim 1, further characterized in that the bleaching agent is selected from a dihaloisocyanurate, trihaloisocyanurate, chloramine-T, N-halosucinimide, N-halomalonimide, N-halophthalimide, halonaphthalimide, 1,3-dihalo salt -5,5-dimethylhydantoin, N-monohalo-C, C-dimethylhydantoin, methylene-bis- (N-halo-C, C-dimethylhydantoin); 1,3-dihalo-5-methyl-5-isobutylhydantoin; 1,3-dihalo-5-methyl-5-ethylhydantoin; 1,3-dihalo-5,5-diisobutylhydantoin; 1,3-dihalo-5-methyl-5-n-amylhydantoin and the like; trihalomelamine and mixtures thereof, in which halo means chlorine.

3. The bleaching detergent composition of claim 1 or 2, further characterized in that the bleaching agent has a particle size of less than 400 μm, preferably from 1 0 to 200 μm, more preferably from 30 to 1 1 μm.

4. The bleaching detergent composition of any of claims 1 to 3, further characterized in that said clay is organically modified smectite, organically modified bentonite or synthetic hectorite. The bleaching detergent composition of any of claims 1 to 4, characterized in that said polymer is a styrene block copolymer / ethylene oxide / propylene oxide, or a styrene-ethylene / butylene-styrene triblock copolymer. 6. The bleaching detergent composition of any of claims 1 to 5, further characterized in that the auxiliary compound is selected from surfactant, whiteness activator, enzyme, dye, perfume, phosphate, foam inhibiting agent, inorganic or hydrogen carbonate, gloss enhancer, sequestering agent and non-aqueous detergent builder, or mixtures thereof. The whitening detergent composition of any of claims 1 to 6, further characterized in that it contains 25 to 50%, preferably 35 to 45% by weight of said bleaching agent. The bleaching detergent composition of any of claims 1 to 7, further characterized in that it contains from 0.1 to 6%, preferably from 1 to 4%, more preferably from 2 to 3% by weight of said thickening agent. 9. The bleaching detergent composition of any of claims 1 to 8, further characterized in that said thickening agent is in a clay: polymer ratio from 1: 3 to 2: 1. 10. The bleaching detergent composition of any of claims 1 to 9, further characterized in that the non-aqueous liquid is paraffin oil. eleven . The bleaching detergent composition of any of claims 1 to 10, further characterized in that the thickener activating agent is propylene carbonate. 12. A closed package containing the bleaching detergent composition of any of claims 1 to 11. A method for preparing the bleaching detergent composition of any of claims 1 to 11, comprising the steps of: i) making a pre-gel from a polymer and a non-aqueous liquid at elevated temperature, which is chemically inert with respect to the bleaching agent and wherein the solubility of the bleaching agent is less than 10 mg / L: ii) making a pre-gel from a clay, the non-aqueous liquid and, optionally, a thickening agent activator, in a high shear mixer; Ii) adding during the stirring the pre-gel of ii) to the pre-gel of i), and iv) adding a solid bleaching agent and, optionally, an auxiliary compound.