WO1997043211A1 - Stabilisation of alkali percarbonate - Google Patents

Stabilisation of alkali percarbonate Download PDF

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Publication number
WO1997043211A1
WO1997043211A1 PCT/EP1997/002301 EP9702301W WO9743211A1 WO 1997043211 A1 WO1997043211 A1 WO 1997043211A1 EP 9702301 W EP9702301 W EP 9702301W WO 9743211 A1 WO9743211 A1 WO 9743211A1
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WO
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Application
Patent type
Prior art keywords
water
alkali metal
use
percarbonate
wt
Prior art date
Application number
PCT/EP1997/002301
Other languages
German (de)
French (fr)
Inventor
Heinz-Manfred Wilsberg
Thomas Merz
Khalil Shamayeli
Original Assignee
Henkel Kommanditgesellschaft Auf Aktien
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Classifications

    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B15/00Peroxides; Peroxyhydrates; Peroxyacids or salts thereof; Superoxides; Ozonides
    • C01B15/055Peroxyhydrates; Peroxyacids or salts thereof
    • C01B15/10Peroxyhydrates; Peroxyacids or salts thereof containing carbon
    • C01B15/106Stabilisation of the solid compounds, subsequent to the preparation or to the crystallisation, by additives or by coating
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/39Organic or inorganic per-compounds
    • C11D3/3902Organic or inorganic per-compounds combined with specific additives
    • C11D3/3937Stabilising agents
    • C11D3/394Organic compounds

Abstract

The invention proposes to improve the storage life of particulate alkali percarbonates, in particular, when used in washing and cleaning agents and also in the presence of bleaching activators substantially by the use of water-soluble salts which can absorb water of crystallization.

Description

Stabilization of Alkalipercarhonat

The present invention relates to the use of certain salts to stabilize Alkalipercarbonaten, in particular in washing or cleaning agents.

Detergents and cleaning agents, the peroxidic oxidizing agent, alone or as a bleach system in the form of a combination of an inorganic peroxide or Perhydrats with a bleach activator, which forms an organic peroxycarboxylic acid under perhydrolysis conditions, contain, have been known for a long time. The active oxygen-containing bleach components most frequently used or

Oxidants are the alkali metal perborates, - percarbonates, - persulfate and persilicates. Suitable bleach activators are generally those compounds are used which release under hydrolysis or perhydrolysis carboxylic acids or percarboxylic acids, such compounds are set ein¬ in predominant extent, the lie¬ in the presence of the peroxidic oxidant peracetic acid remotely. Since the reaction of the activator with the peroxygen compound, which is to take place among the most aqueous application conditions of the agent, and in the production and run in particular storage of such agents can, whereby Re is zu¬ the availability of the peroxygen compound for the actual application, has been used for a long after stabilizers for the peroxygen compounds sought. For instance, the envelope of the activator or the Oxidationsmittelkom- component or both have been proposed with fatty acids. Also, the addition of certain stabilizers, for example magnesium silicate, is known. For percarbonathaltige bleaching systems, the problem of lack of storage stability is particularly difficult to resolve because this perhydrate is extremely susceptible to hydrolysis and is both rapid decomposition of the normal humidity as well as in agents, which are stored in waterproof packaging, decomposes with loss of active oxygen. On the other hand there is the problem that the perhydrates when they are free of water can decompose explosively. To stabilize these perhydrates, is usually a certain amount of water before, or as described above Stabili¬ capacitors added. In the German patent application DE 31 41 745, for example an enzyme-containing bleaching composition is described which an effective bleaching of fabrics inorganic peroxide and 0.01 to 5 wt .-%, based on the total mass of the enzymes, hydrolase, transferase, Oxyreductase, lyase , isomerase, ligase, protease, lipase, cellulase or amylase having an optimum activity temperature of 10 ° C to 80 ° C with an optimum pH of 4 to 12, and at least 0.1 to 20 wt .-%, based on the contains total mass of an anhydrous salt from the series consisting of anhydrous sodium citrate, anhydrous magnesium sulfate, anhydrous calcium chloride, and anhydrous zinc sulfate. The water content of the total mass of the composition described is less than 2 wt .-%.

In the European patent application EP 0407045 a stabilized Natriumpercar- is described bonatzusammensetzung, the wt .-% of at least one compound selected from the group consisting of urea, ureas material derivatives in addition to sodium percarbonate from 2.5 to 35, acetates, amino acids having no more than seven contains carbon atoms, or their salts, triazine compounds and guanidine compounds as stabilizers.

Conventional bleaches, detergents and cleaners usually contain in addition to peroxide oxidizing agents such as alkali percarbonate also builders and tensides. The builders and surfactants can be obtained by spray-drying aqueous slurries in powder form. This product obtained from the spray tower still contains more or less large amounts of water. When the spray dried product for producing a bleaching and Waschmittel¬ composition mixed with other substances contained therein, for example with alkali metal percarbonate, there is a risk that the water contained in the spray-dried product decomposes the alkali metal percarbonate bleach and the effect of the composition after a short storage time is reduced to a very low value.

The object of the present invention is to improve the shelf life of Alkalipercarbonaten, particularly when they are used in detergents and cleaning agents so that such agents do not have the above disadvantages and they can also contain certain amounts of water.

Surprisingly, it has been found that this can be achieved by using certain water-soluble salts.

The present invention is the use of water soluble salts, the water of crystallization can be deposited, for stabilizing particulate alkali metal percarbonate by.

Further objects of the invention are the use of water soluble salts, the water of crystallization can be deposited, for stabilizing alkali metal percarbonate in detergents or cleaning agents which may be powdered, liquid, paste or block-shaped. At the block-shaped detergents and cleaning products including tablet-shaped means. These can Application WO 94/25563 or from German patent applications DE 44 29 550 are produced or DE 196 01 840 using microwave particular according to the method of International Patent¬. For use in liquid or pasty means, these are preferably water-free.

In order to be used in the invention must have the water-soluble salts, the crystal water can accumulate, surprisingly, not be used in their crystalline anhydrous form, but are quite capable of stabilizing alkali percarbonate, even if they hydrated whole or in part, that is with water crystal lattice present.

Around the underlying effect of the invention to achieve, the spatial proximity of alkali metal percarbonate, and water-soluble salt, the water of crystallization can attach required. The inventive use can be carried out in that one can attach alkali metal percarbonate, and water-soluble salt, the water of crystallization, is mixed in particle or powder form with each other or the alkali metal percarbonate can settle with the water soluble salt, the water of crystallization in known in principle manner, enveloped or coatet. Preferably the water soluble, capable of binding water of crystallization of salt in the Ge weight ratio is 1: 1 to 1: 12, especially 1: 2 to 1: 10, based on alkali metal percarbonate, are used.

According to the invention to use water-soluble salts are preferably selected from the alkali metal acetates, the Alkalitricitrat-dihydraten and mixtures thereof. Be¬ vorzugtes alkali metal in such alkali metal salts as well as in to be stabilized alkali percarbonate is sodium. Also, alkali metal perborates such as the so-called sodium perborate monohydrate and the so-called sodium perborate tetrahydrate can be stabilized by the inventive use water-soluble salt.

In particular, in the inventive use in detergents and cleaning agents to stabilize the alkali metal percarbonate is preferably in presence of an activator Bleich¬ instead of forming an organic peroxycarboxylic acid under perhydrolysis conditions. Among the optionally present in the compositions include, in particular bleach activators give compounds which comprises optionally substituted perbenzoic acid under perhydrolysis conditions and / or peroxocarboxylic acids having from 1 to 10 carbon atoms, especially 2 to 4 carbon atoms. Suitable substances having O and / or N-acyl groups of said number of carbon atoms and / or optionally substituier¬ te benzoyl groups are particularly suitable. polyacylated alkylenediamines, more particularly sondere tetraacetylethylenediamine (TAED), acylated glycolurils, in particular Tetraace- tylglykoluril (TAGU), acylated triazine derivatives, especially l, 5-diacetyl-2,4-dioxo-hexahydro-l, 3,5-triazine are preferred (DADHT), acylated phenolsulfonates, in particular nonanoyl or isononanoyloxybenzenesulfonate, acylated polyhydric alcohols, especially triacetin, ethylene glycol diacetate and 2,5-diacetoxy-2,5-dihydrofuran, and also acetylated sorbitol and mannitol and acylated sugar derivatives, especially pentaacetylglucose (PAG), pentaacetyl fructose , tetraacetyl xylose and octaacetyl lactose and acetylated, optionally N-alkylated glucamine and gluconolactone. Also known from the German patent application DE 44 43 177 Bleichaktivatorkombinationen can be used. In addition to or instead of such bleach activators known salts or complexes as bleach catalysts transition metals of over, including in particular Mn, Co, Fe and / or Cu, are used as for example from the German patent applications DE 44 16 438, DE 195 29 905, DE 195 36 082 or DE 196 05 688, or the European Patentanmel¬ applications EP 0392592, EP 0443651, EP 0 458 397, EP 0544490, EP 0549271, EP 0630964 and EP 0 693 550. are.

Detergents and cleaning agents can except alkali metal percarbonate and the inventive use the water-soluble salt, and optionally the bleach activator contain all ingredients usual in such compositions, including in particular substances Builder¬, surfactants, additional organic and / or especially an¬ organic peroxygen compounds, water-miscible organic solvent , En¬ zyme, sequestering agents, electrolytes, pH regulators and other adjuvants such as optical brighteners, graying inhibitors, color transfer inhibitors, Schaumregula¬, silver corrosion inhibitors, abrasives, as well as dyes and fragrances include.

Among the candidate surfactants include, in particular, anionic surfactants, ionic surfactants and mixtures thereof nicht¬. Suitable nonionic surfactants are in particular alkyl glycosides and ethoxylation and / or propoxylation products of alkyl - glycosides or linear or branched alcohols containing 12 to 18 carbon atoms in the alkyl moiety and 3 to 20, preferably 4 to 10 alkyl ether. Furthermore entspre¬ sponding ethoxylation and / or propoxylation products of N-alkylamines, vicinal diols, fatty acid esters and fatty acid amides, which correspond to the long-chain alcohol derivatives with regard to the alkyl moiety, and of alkylphenols of 5 to 12 carbon atoms in the alkyl radical.

Suitable anionic surfactants are in particular soaps and those containing sulfate or sulfonate groups, preferably with alkali ions as cations. Preferred soaps are the alkali metal salts of saturated or unsaturated fatty acids having 12 to 18 carbon atoms. Such fatty acids can also be used in a not completely neutralized form. Suitable surfactants of the sulfate type are the salts of sulfuric acid half esters of fatty alcohols having 12 to 18 carbon atoms and the sulfation of said nonionic surfactants with a low degree of ethoxylation. Suitable surfactants of the sulfonate type include alkyl benzene sulfonates linear with 9 to 14 C atoms in the alkyl moiety, alkane sulfonates having 12 to 18 carbon atoms, and olefin sulfonates having 12 to 18 carbon atoms, which in the implementation chender entspre¬ monoolefins arise with sulfur trioxide sulfofatty acid esters, which result from the sulfonation of fatty acid methyl or ethyl esters.

Such surfactants are in the cleaning or washing agents in proportions of preferably 5 wt .-% to 50 wt .-%, particularly 8 wt .-% to 30 wt .-%, keep ent. In compositions for cleaning dishes, however, the lower limit mentioned can be exceeded; the surfactant in such compositions is preferably 0.1 wt .-% to 20 wt .-%, in particular 0.2 wt .-% to 5 wt .-%.

As desired, additional bleaching agents known peroxygen especially organic peracids, hydrogen peroxide and hydrogen peroxide conditions under Anwendungsbe¬ come releasing inorganic salts such as perborate, persulfate and / or persilicate. If solid peroxygen compounds are to be used, they can be used in the form of powders or granules, the manner known in principle can also be encapsulated. Alkali metal perborate monohydrate is preferably used as an additional bleaching agent. If the washing or Reinigungs¬ medium contains additional peroxygen compounds, they are, including the alkali metal carbonate in amounts of preferably 5 wt .-% to 30 wt .-%, especially 10 wt .-% to 25 wt .-% present, these amounts being are including the alkali percarbonate to understand.

Furthermore, the washing and cleaning agents may contain water-soluble and / or wasser¬ insoluble, organic and / or inorganic builder. To the union wasserlös¬ organic builders include polycarboxylic acids, particularly citric acid and sugar acids, monomeric and polymeric aminopolycarboxylic acid ins¬ particular methylglycinediacetic acid, nitrilotriacetic acid and ethylenediaminetetraacetic and polyaspartic acid, polyphosphonic acids, especially amino-tris (methylenephosphonic acid), ethylenediaminetetrakis (methylenephosphonic acid) and 1 - hydroxyethane-1,1-diphosphonic acid, polymeric hydroxy compounds such as dextrin as well as polymeric (poly) carboxylic acids, in particular the zugäng¬ by oxidation of polysaccharides union polycarboxylates the international patent application WO 93/161 10 and the international Patent application WO 92/18542 or European Patent EP 0232202, polymeric acrylic acids, methacrylic acids, maleic acids and copolymers thereof which in copolymerized form also contain small amounts of polymerizable substances with no carboxylic acid functionality may also contain , The molecular weight of the homopolymers of unsaturated carboxylic acids are generally employed is from 5000 to 200,000, that of the copolymers 2000-200000, preferably from 50,000 to 120,000, based on free acid. A particularly be¬ vorzugtes acrylic acid-maleic acid copolymer has a relative molecular weight from 50,000 to 100,000. Suitable, but less preferred compounds of this class are copolymers of acrylic acid or methacrylic acid with vinyl ethers such as vinyl methyl ethers, vinyl esters, ethylene, propylene and styrene, in which the proportion of acid is at least 50 wt .-% by weight. As the water-soluble organic builders are terpolymers may be used as monomers containing two unsaturated acids and / or their salts and as third monomer, vinyl alcohol and / or an esterified vinyl alcohol or a carbohydrate. The first acidic monomer or its salt is derived from a monoethylenically unsaturated C 3 -C 8 carboxylic acid and preferably from a C 3 -C 4 monocarboxylic acid, in particular (meth) acrylic acid. The second acidic monomer or its salt may be a derivative of a C 4 -C 8 - dicarboxylic acid, maleic acid being particularly preferred, and / or a derivative of an allyl sulfonic acid substituted in the 2-position with an alkyl or aryl radical. Such polymers can be prepared in particular according to methods which are described in the German patent DE 42 21 381 and German patent application DE 43 00 772 and a molecular weight from 1000 to 200,000 in generally. Other preferred copolymers are those which are described in the German patent applications DE 43 03 320 and DE 44 17 734 and as monomers which preferably contain acrolein and acrylic acid / acrylic acid salts or vinyl acetate. The organic builders can be used in the form of aqueous solutions, preferably in the form of 30 to 50 percent strength by weight aqueous solutions, particularly for CONSTRUCTION liquid or paste-like agent. All ge called acids are usually used in the form of their water-soluble salts, particularly their alkali metal salts. Such organic builder substances may, if desired, in amounts up to 40 wt .-%, in particular up to 25 wt .-%, and contain preferably from 1 wt .-% to 8 wt .-%. Quantities near the upper limit mentioned are preferably used in paste-form or liquid agents.

As a water-soluble inorganic builders are polyphosphates are phosphates, preferably sodium triphosphate, into consideration. Suitable water-insoluble, water-dispersible inorganic builders are alkali metal aluminosilicates, in particular crystalline or amorphous, in amounts of up to 50 wt .-%, preferably not more than 40 wt -%, and in liquid compositions and in particular of 1 wt .-% to 5 wt .-% employed. Among these, the crystalline sodium aluminosilicates in detergent quality, more particularly zeolite A, P and optionally X, are preferred. Quantities near the upper limit mentioned are preferably used in solid particulate compositions. Suitable silicates Alumosi- particular exhibit no particles having a particle size greater than 30 microns and preferably consist of at least 80 wt .-% of particles having a size below 10 microns. Their calcium binding capacity, which can be determined in accordance with German Patent DE 24 12 837, is usually in the range of 100 to 200 mg CaO per gram. Suitable substitutes or partial substitutes for the alumosilicate mentioned are crystalline alkali metal silicates which may be present alone or in admixture with amorphous silicates. The use as builders in the alkali metal silicates preferably have a molar ratio of alkali metal oxide to SiO 2 of less than 0.95, in particular from 1: 1.1 to 1: 12, and may be amorphous or crystalline. Be¬ ferred alkali metal silicates are the sodium silicates, more particularly amorphous sodium silicates, with a molar ratio Na 2 0: SiO 2 of 1: 2 to 1: 2.8. Those with a molar ratio Na 2 O: SiO 2 of 1: 1.9 to 1: 2.8 can be prepared 0425 427 by the process of European patent application EP. The crystalline silicates which may be present alone or in admixture with amorphous silicates, are preferred wise crystalline layer silicates with the general formula Na 2 Si x O 2x + used 1 y H2 O, in which x, known as the modulus, an integer from 1 , 9 to 4 and y is a number from 0 to 20, preferred values ​​for x being 2, 3 or. 4 Crystalline layer silicates which are covered by this general formula are described for example in the European patent application EP 0 164 514th Preferred crystalline layer silicates are those in which x assumes in said general formula the values ​​2 or the third In particular, both .beta.- and δ-sodium (Na 2 Si 2 O 5 y H 2 O) are preferred, with ß-sodium di-silicate, for example, by the process can be obtained, which described in the interna¬ tional Patent Application WO 91/08171 is. δ-Sodium silicates with a modulus from 1.9 to 3.2 can be prepared according to Japanese Patent Application JP 04/238 809 or JP 04/260610. prepared from amorphous alkali silicates, practically water-free crystalline alkali metal silicates of the abovementioned general formula in which x is a number from 1.9 to 2.1, prepared as described in European patent applications EP 0 548 599, EP 0502325 and EP 0 452 described 428, can be used in detergents and cleaners. In a further preferred embodiment of means in which there is the use according to the invention, a crystalline sodium layered silicate with a modulus of 2 to 3 as 0436 835 can be made of sand and soda according to the method of European patent application EP. Crystalline sodium silicates with a modulus in the range of 1.9 to 3.5, such as are obtainable by the methods of European Patent EP 0 164 552 and / or EP 0293753, are used in a further preferred embodiment of such means. If as Buildersub- punched alkali metal alumosilicate, more particularly zeolite, is also present, the weight ratio of aluminosilicate to silicate, based on anhydrous active substances, preferably 1:10 to 10: 1. In products containing both amorphous and crystalline alkali metal silicates, the ratio by weight of amorphous alkali silicate to crystalline alkali metal silicate is preferably 1: 2 to 2: 1 and especially 1: 1 to 2: 1.

Builders are preferably used .-%, particularly 5 wt .-% to 40 wt .-%, containing in the detergents or cleaning formulations in quantities of up to 60 while Desin¬ fektionsmittel preferably free of complexing to only the components of the water hardness builders and are preferably no more than 20 wt .-%, in particular 0.1 wt .-% to 5 wt .-%, of heavy metal complexing agents, preferably from the group comprising acids, aminopolycarboxylic acids, and Aminopolyphosphon- hydroxypolyphosphonic and their water-soluble salts thereof and the mixtures contain,

As usable in detergents and cleaners enzymes are those from the class of proteases, lipases, cutinases, amylases, pullulanases, cellulases, hemicellulases, xylanases, oxidases and peroxidases and mixtures thereof are suitable. Particularly suitable are from fungi or bacteria, such as Bacillus subtilis, Bacillus licheniformis, Streptomyces griseus, Humicola lanuginosa, Humicola insolens, Pseudomonas pseudoalcaligenes or Pseudomonas cepacia Enzymatic active substances obtained. The enzymes optionally used may be described 94/23005, be adsorbed on carriers and / or embedded in coating substances in order to protect against vor¬ term inactivation, such as in international patent applications WO 92/11347 or WO. They are in detergents and cleaning agents in amounts of preferably up to 2 wt .-%, particularly from 0.2 wt .-% to l, 5 wt .-%, of.

To the in detergents and cleaning agents, particularly when they are in liquid or pasty form ser, usable organic solvents include alcohols having 1 to 4 carbon atoms, especially methanol, ethanol, isopropanol and tert-butanol, diols having from 2 to 4 mix carbon atoms, particularly ethylene glycol and propylene glycol, and Ge and the derivable from the aforesaid compound classes ether. Such was¬-miscible solvents are present in detergents, cleaning and disinfecting agents is preferably not more than 30 wt .-%, particularly 6 wt .-% to 20 wt .-%, the vorhan¬.

To establish a desired, by the mixture of the remaining components does not arise pH such agents may contain system and umwelt¬ acceptable acids, in particular tartaric acid, malic acid, lactic acid, glycolic acid, Bern¬ acid, glutaric acid and / or adipic acid, mineral acids, especially sulfuric acid, or bases, particularly ammonium or alkali metal hydroxides. Such pH-regulators are in the compositions is preferably not more than 20 wt .-%, more particularly sondere of 1, 2 wt .-% to 17 wt .-%, of.

The useful for use in detergents for the washing of clothing in question dye transfer inhibitors include in particular polyvinyl pyrrolidones, polyvinyl imidazoles, polymeric N-oxides such as poly (vinyl pyridine-N-oxide) and copolymers of vinylpyrrolidone with vinylimidazole.

Graying inhibitors have the task suspended detached from the hard surface and particularly from the textile fibers dirt in the fleet to maintain and to support the builders or co-builders. Water-soluble colloids usually of an organic nature are suitable, for example, glue, gelatin, salts of ether carboxylic acids or ether sulfonic acids of starch or cellulose or salts of acidic sulfuric acid esters of cellulose or starch. Water-soluble polyamides containing acid groups are suitable for this purpose. Furthermore, other than the above-mentioned starch products, for example aldehyde. Preferred are cellulose ethers such as carboxymethyl cellulose (Na salt), methyl cellulose, hydroxyalkyl cellulose, and mixed ethers, such as methylhydroxyethylcellulose, methylhydroxypropylcellulose, Methylcarboxymethyl- cellulose and their mixtures, for example in amounts of 0, 1 to 5 wt .-%, based on the means used ,

The agents may sulfonic acid as optical brighteners, for example, derivatives of Diaminostilbendisul- respectively contain alkali metal salts thereof. Suitable are, for example, salts of 4,4'-bis (2-anilino-4-moφholino-l, 3,5-triazinyl-6-amino) stilbene-2,2'-disulfonic acid or compounds of similar structure, instead of the morpholino carry a diethanolamino group, a methylamino group, an anilino group or a 2-methoxyethylamino -. Brighteners of the substituted diphenyl styryl type, for example alkali metal salts of 4,4'-bis (2-suIfostyryI) -diphenyls, 4,4'-bis (4-chloro-3-suIfostyryl) -diphenyls, or 4 - (4 chlorostyryl) -4 - (2-sulfostyryl). Mixtures of the above-mentioned optical brighteners may be used.

In particular, when used in automatic washing and cleaning processes, it may be advantageous to add conventional foam inhibitors. Suitable foam inhibitors are, for example, soaps of natural or synthetic origin which have a high proportion of C 18 -C 24 fatty acids. Suitable non-active foam inhibitors are, for example, organopolysiloxanes and mixtures thereof with microfine, optionally silanized silica and also paraffins, waxes, microcrystalline waxes and mixtures thereof with silanized silica or Bisfettsäurealkylendiamiden. With advantages also mixtures of different foam inhibitors, for example mixtures of silicones, paraffins or waxes. Preferably, the foam inhibitors, more particularly silicone- and / or paraffin-containing foam inhibitors, to a granular-soluble or dispersible carrier material in water. Mixtures of paraffins and bistearylethylenediamides are preferred.

The preparation of solid compositions presents no difficulties and can, for example, by spray drying or granulation, in a known manner, wherein Persauerstoffverbin¬ compounds, in particular the alkali metal percarbonate, and other heat-sensitive ingredients may optionally be added separately later. For the preparation of compositions with increased bulk density, especially in the range of 650 g / 1 to 950 g / 1, 0 486 592 and known from the European patent EP aufweisen¬ an extrusion step of the method is preferred. Liquid or pasty detergent or Reinigungsmit¬ tel containing in the form of customary solvents are generally prepared by simple mixing of the ingredients can be added neat or as a solution in a mixer automa¬ tables.

Claims

claims
1. Use of water-soluble salts, the water of crystallization can be deposited, for stabilizing particulate alkali metal percarbonate by.
2. The use of water soluble salts, the water of crystallization can be deposited, for stabilizing of alkali metal percarbonate in powdered detergents or cleaning agents.
3. Use of water-soluble salts, the water of crystallization can be deposited, for stabilizing alkali metal percarbonate in of liquid detergents or cleaners.
4. The use of water-soluble salts that can accumulate water of crystallization, for stabilizing of alkali percarbonate in pastenfbrmigen washing or cleaning agents.
5. Use according to claim 3 or 4, characterized in that the liquid or pastenfbrmige agent is anhydrous.
6. The use of water soluble salts, the water of crystallization can be deposited, for stabilizing alkali metal percarbonate in of block-shaped, in particular tablettenfbrmigen washing or cleaning agents.
7. Use according to any one of claims 1 to 6, characterized in that the water-soluble salts from the alkali metal acetates, the Alkalitricitrat-dihydraten and mixtures thereof are selected.
8. Use according to any one of claims 1 to 7, characterized in that the water soluble salt is a sodium salt.
9. Use according to one of claims 1 to 8, characterized in that the alkali metal percarbonate is sodium percarbonate.
10. Use according to any one of claims 1 to 9, characterized in that the stabilization in the presence of a bleach activator takes place, the conditions under perhydrolysis forms an organic peroxycarboxylic acid.
PCT/EP1997/002301 1996-05-15 1997-05-06 Stabilisation of alkali percarbonate WO1997043211A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19619646.9 1996-05-15
DE1996119646 DE19619646A1 (en) 1996-05-15 1996-05-15 Stabilizing alkali

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EP19970922976 EP0902756A1 (en) 1996-05-15 1997-05-06 Stabilisation of alkali percarbonate

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000050557A1 (en) * 1999-02-25 2000-08-31 Henkel Kommanditgesellschaft Auf Aktien Washing and cleaning agent shaped bodies which are stable in storage
US7435714B2 (en) 2002-12-20 2008-10-14 Evonik Degussa Gmbh Liquid detergent and cleaning agent composition comprising a multi-coated bleach particle
US7588697B2 (en) 2003-05-07 2009-09-15 Evonik Degussa Gmbh Coated sodium percarbonate granules with improved storage stability
US7718592B2 (en) 2004-11-11 2010-05-18 Degussa, Gmbh Sodium percarbonate particles having a shell layer comprising thiosulfate

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DE10032177A1 (en) * 2000-07-01 2002-01-10 Henkel Kgaa Coating methods for basiche particulate compounds
DE102004060011A1 (en) * 2004-12-14 2006-07-06 Degussa Ag Compressed shaped body containing coated sodium

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FR2229766A1 (en) * 1973-05-14 1974-12-13 Procter & Gamble
EP0268170A2 (en) * 1986-11-15 1988-05-25 Henkel Kommanditgesellschaft auf Aktien Bleaching composition with a constant shelf-life and with improved solution ability
EP0546815A1 (en) * 1991-12-11 1993-06-16 Unilever Plc Sodium percarbonate
DE4324104A1 (en) * 1993-07-17 1995-01-19 Degussa Coated sodium percarbonate particles, processes for their preparation and their use
WO1995002670A1 (en) * 1993-07-14 1995-01-26 The Procter & Gamble Company Granular laundry detergent compositions containing stabilised percarbonate bleach particles
DE4424005A1 (en) * 1994-07-07 1996-01-11 Henkel Kgaa Powdered bleach and detergent

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2229766A1 (en) * 1973-05-14 1974-12-13 Procter & Gamble
EP0268170A2 (en) * 1986-11-15 1988-05-25 Henkel Kommanditgesellschaft auf Aktien Bleaching composition with a constant shelf-life and with improved solution ability
EP0546815A1 (en) * 1991-12-11 1993-06-16 Unilever Plc Sodium percarbonate
WO1995002670A1 (en) * 1993-07-14 1995-01-26 The Procter & Gamble Company Granular laundry detergent compositions containing stabilised percarbonate bleach particles
DE4324104A1 (en) * 1993-07-17 1995-01-19 Degussa Coated sodium percarbonate particles, processes for their preparation and their use
DE4424005A1 (en) * 1994-07-07 1996-01-11 Henkel Kgaa Powdered bleach and detergent

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000050557A1 (en) * 1999-02-25 2000-08-31 Henkel Kommanditgesellschaft Auf Aktien Washing and cleaning agent shaped bodies which are stable in storage
US7435714B2 (en) 2002-12-20 2008-10-14 Evonik Degussa Gmbh Liquid detergent and cleaning agent composition comprising a multi-coated bleach particle
US7588697B2 (en) 2003-05-07 2009-09-15 Evonik Degussa Gmbh Coated sodium percarbonate granules with improved storage stability
US7718592B2 (en) 2004-11-11 2010-05-18 Degussa, Gmbh Sodium percarbonate particles having a shell layer comprising thiosulfate

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Publication number Publication date Type
EP0902756A1 (en) 1999-03-24 application
DE19619646A1 (en) 1997-11-20 application

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