EP1157089A2

EP1157089A2 - Formulations containing peroxide with colouring agents in microcapsules

Info

Publication number: EP1157089A2
Application number: EP00905071A
Authority: EP
Inventors: Lidia Jimenez Carrillo
Original assignee: Henkel AG and Co KGaA
Current assignee: Henkel AG and Co KGaA
Priority date: 1999-02-27
Filing date: 2000-02-18
Publication date: 2001-11-28
Also published as: DE29903534U1; WO2000052120A3; AU2672600A; WO2000052120A2; CA2299781A1

Abstract

The invention relates to formulations containing peroxide which are characterised in that they contain colouring agents in a microencapsulation.

Description

Peroxide-containing preparations with colorants in microcapsules

Field of the Invention

The invention is in the field of bleaching and disinfecting agents and relates to peroxide-containing preparations which contain coloring agents in a microencapsulation.

State of the art

In the Mediterranean countries, but also in the United States, the cold washing of textiles still predominates. As a result, conventional bleaching agents such as e.g. Perborates or percarbonates are rarely used because they do not show any particular activity at temperatures around 20 ° C. Liquid wash bleaches, which are, for example, surfactant preparations with a content of up to 10% by weight of hydrogen peroxide, are therefore usually added to the wash liquor. These peroxide bleaching solutions rarely contain colorants, as these can easily be oxidized in a peroxide-containing environment and thus change their color.

The object of the present invention was therefore to formulate colorants stably in peroxide-containing preparations and thereby to improve their visual appearance.

Description of the invention

The invention relates to peroxide-containing preparations which are distinguished in that they contain colorants in a microencapsulation.

Surprisingly, it has been found that colorants can be stably formulated in peroxide-containing preparations in a microencapsulation and thereby the optical appearance can be improved. In the agents according to the invention, the microcapsules are chemically and physically, in particular spatially, stable, ie on average neither decomposition nor occurs Deposit the microcapsules. In this way, practically all known colorants can be used in peroxide-containing preparations.

Peroxide compounds

The term peroxide compounds is to be understood as meaning substances which contain an O-O group. Typical examples are perborates, percarbonates, percarboxylic acids and especially hydrogen peroxide. The aqueous compositions according to the invention preferably contain hydrogen peroxide in amounts of 0.5 to 10, preferably 5 to 8 and in particular 6 to 7% by weight. The calculation relates to 100% active substance, for example in the form of a 35% by weight aqueous solution.

Microcapsules

The term “microcapsule” is understood to mean aggregates which contain at least one solid or liquid core which is surrounded by at least one continuous shell. More specifically, they are finely dispersed liquid or solid phases which are coated with film-forming polymers and in the production of which the polymers after emulsification and coacervation or interfacial polymerization, deposit on the material to be encased. The microscopic capsules, also known as nanocapsules, can be dried like powders. In addition to mononuclear microcapsules, multinuclear aggregates, including microspheres, are known, which contain two or more nuclei distributed in the continuous shell material. Single-core or multi-core microcapsules can also be enclosed by an additional second, third, etc. Preferred are single-core microcapsules with a continuous shell, which can be made of natural, semi-synthetic or synthetic materials Natural wrapping materials are, for example, gum arabic, agar agar, agarose, maltodextrins, alginic acid or their salts, e.g. Sodium or calcium alginate, fats and fatty acids, cetyl alcohol, collagen, chitosan, lecithins, gelatin, albumin, shellac, polysaccharides, such as starch or dextran, sucrose and waxes. Semi-synthetic wrapping materials include chemically modified celluloses, especially cellulose esters and ethers, e.g. Cellulose acetate, ethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose and carboxymethyl cellulose, and starch derivatives, especially starch ethers and esters. Synthetic covering materials are, for example, polymers such as polyacrylates, polyamides, polyvinyl alcohol or polyvinyl pyrrolidone.

The microcapsules can have any shape in the production-related framework, but they are preferably approximately spherical. Their diameter along their largest Depending on the substances contained inside and the application, the spatial extent can be between 10 nm (not visually recognizable as a capsule) and 10 mm. Visible microcapsules with a diameter in the range from 0.1 mm to 7 mm, in particular from 0.4 mm to 5 mm, are preferred. Microcapsules that can no longer be seen with the naked eye preferably have a diameter in the range from 20 to 500 nm, preferably 50 to 200 nm. The microcapsules can be obtained by methods known in the art, with coacervation and interfacial polymerization being of the greatest importance. All surfactant-stable microcapsules available on the market can be used as microcapsules, for example the commercial products (the shell material is given in brackets), Hallcrest Microcapsules (gelatin, gum arabic), Coletica Thalaspheres (maritime collagen), Lipotec Millicapsules (alginic acid, agar-agar) , Induchem Unispheres (lactose, microcrystalline cellulose, hydroxypropylmethyl cellulose); Unicerin C30 (lactose, microcrystalline cellulose, hydroxypropylmethyl cellulose), Kobo Glycospheres (modified starch, fatty acid esters, phospholipids), Softspheres (modified agar agar) and Kuhs Probiol Nanospheres (phospholipids).

The substances are usually released from the microcapsules during use of the preparations containing them by destroying the shell as a result of mechanical, thermal, chemical or enzymatic action. In the bleaching agents which are usually used undiluted, the release is preferably carried out by mechanical action, in particular by mechanical forces, to which the microcapsules are exposed during metering, pumping over or spinning in the washing machine. In a preferred embodiment of the invention, the compositions contain identical or different microcapsules in amounts of 0.1 to 10% by weight, in particular 0.2 to 8% by weight, extremely preferably 0.5 to 6% by weight.

Colorants

For the purposes of the invention, colorants are all coloring inorganic and organic substances [DIN 55944 (Nov. 1973)]. Both natural and synthetic colorants can be used. The inorganic colorants are pigments and may also have a filler character, while the organic colorants include both pigments and dyes. The colorants include e.g. also gloss, pearlescent u. Luminous pigments. Fluorescent dyes, so-called optical brighteners, are to be excluded from this.

For the purposes of the invention, dyes are colorants which are soluble in solvents and / or binders and which absorb in the range of visible light. Both natural, for example flower and plant dyes, and synthetic dyes, such as for example aromatic or heterocyclic, ionic or nonionic compounds.

Possible color pigments include green chlorophthalocyanines (Pigmosol® green, Hostaphine® green), yellow Solar Yellow BG 300 (Sandoz), blue chlorophthalocyanine (Hostaphine® blue) or Cosmenyl® blue.

An overview of the colorants offered in Europe can be found in "Textilbetrieb", Würzburg, 1978, pp. 51-71. Suitable and approved substances can also be used as colorants, as described, for example, in the publication "Cosmetic Colorants" by the German Dye Commission Research Foundation, 3rd, completely revised edition Verlag Chemie, Weinheim, 1991, pp. 81-106.

These colorants are used in the agents according to the invention in microencapsulated form. This includes not only the use of a single colorant in microencapsulated form, for example a colorless peroxide bleach with blue microcapsules, but also the use of different colorants in microencapsulated form, for example a colorless peroxide bleaching agent with blue and green microcapsules. There is no limit to the number of microencapsulated coloring agents used at the same time, for example microcapsules with 3, 4, 5, etc. different coloring agents.

In a special embodiment of the invention, in addition to microencapsulated coloring agents, non-microencapsulated coloring agents can also be added to the peroxide-containing preparations. These include blue peroxide bleaches with blue and / or red microcapsules, for example. Colored peroxide bleaching agents with many differently colored microencapsulated coloring agents are also possible, for example a green peroxide bleaching agent with blue, green, red, etc. microcapsules. In this way, mixtures are obtainable in which the microcapsules and the agents according to the invention can contain both the same and different coloring agents.

The colorants are preferably used in concentrations of 0.05 to 0.4 and in particular 0.1 to 0.3% by weight, based on the mixture as a whole.

Sequestrant

If the preparations are used to treat textiles, it is advisable to add electrolytes that serve as sequestering agents for heavy metal ions and thus counteract yellowing of the laundry. Silicates, for example, are suitable for this purpose, Phosphonic acids or phosphonates, polyacrylic acid compounds, alkali carbonates, lignin sulfonates and mixtures of the electrolytes mentioned. The total amount of the sequestering agents used is usually 0.1 to 2, preferably 0.3 to 1.5 and in particular 0.5 to 1.0% by weight, based on the agent.

For the purposes of the invention, silicates are understood to mean salts and esters of orthosilicic acid Si (OH) ₄ and their self-condensation products. Accordingly, the following crystalline substances can, for example, be used as silicates:

(a) Neosilicates (island silicates) such as phenakite, olivine and zircon;

(b) Sorosilicates (group silicates) such as thortveitite and hemimorphite;

(c) cyclosilicates (ring silicates) such as, for example, benitoid, axinite, beryl, milarite, osumilite or eu-dialyth;

(d) inosilicates (chain and band silicates) such as metasilicates (e.g. diopside) or amphiboles (e.g. tremolite);

(e) phyllosilicates (leaf and layer silicates) such as talc, kaoiinite or mica (e.g. Mus-covit);

(f) Tectosilicates (framework silicates) such as feldspars and zeolites as well as clathrasils or dodecasils (e.g. melanophlogite), thaumasite and neptunite.

In contrast to the ordered crystalline silicates, silicate glasses such as e.g. Soda or potash water glass used. These can be of natural origin (e.g. montmorillonite) or synthetic. In a further embodiment of the invention, aluminosilicates can also be used. Typical examples of alkali or alkaline earth silicates are sodium and / or potassium silicates with a modulus in the range from 1.0 to 3.0 and preferably 1.5 to 2.0.

Phosphonic acids are organic derivatives of the acid HP (0) (OH) ₂ ; Phosphonates are the salts and esters of these phosphonic acids. The preferred organic phosphonic acids or phosphonates are known chemical compounds which can be prepared, for example, by the Michaelis-Arbuzov reaction. For example, they follow formula (I) 0

II 1-P-0R ² (I)

OR ²

in which R ^{1 represents} an optionally substituted alkyl and / or alkenyl radical having 1 to 22, preferably 2 to 18 and in particular 6 to 12 carbon atoms and R ^{2 represents} hydrogen, an alkali metal and / or alkaline earth metal, ammonium, alkylammonium and / or alkanolammonium or an optionally substituted alkyl and / or alkenyl radical having 1 to 22, preferably 2 to 18 and in particular 6 to 12 carbon atoms. Typical examples are optionally hydroxy-, nitrilo- and / or amino-substituted phosphonic acids such as ethylphosphonic acid, nitrilotris (methylenephosphonic acid), 1-amino or 1-hydroxyalkane-1, 1-diphosphonic acids. Amine oxide phosphonic acids which follow the formula (II) are preferably used

0 CH ₃ H

II I I

HO-P- (CH ₂ ) m (CH) _n -N-> 0 (II)

1 I

OR ³ H

in which R ^{3 represents} hydrogen, a (CH2) m (CHCH3) nNH2θ group or an alkali metal, m represents numbers from 1 to 4 and n represents 0 or 1. Amine oxide phosphonic acids are builders or sequestering agents which are sold, for example, by Bozetto / IT under the Sequion® brand. For their preparation, one starts from aminophosphonic acids, which are converted to the amine oxide. For the purposes of the invention, both mono- and diamine oxides can be used in the form of the phosphonic acids or their salts, which follow the formula (II). Amine oxidephosphonic acids are preferably used in which R ^{3 is} hydrogen, m is 3 and n is 0 (amine oxide based on aminotri-methylenephosphonic acid). Polyacrylic acid compounds are homopolymers of acrylic acid and methacrylic acid or their esters. In addition to the acids, esters of the acids can also be polymerized with alcohols having 1 to 4 carbon atoms. Polyacrylic acid compounds with a particularly advantageous stabilizing action are present as alkali salts and have an average molecular weight in the range from 1,000 to 10,000 and in particular 4,000 to 6,000 daltons. Surfactants

To support the cleaning performance, the preparations can furthermore contain peroxide-stable surfactants, such as, for example, fatty acid salts, alkyl sulfates, alkyl sulfonates, alkylbenzenesulfonates, xylene sulfonates, sarcosinates, taurides, isethionates, sulfosuccinates, betaines, sugar esters and fatty acid N-alkylglucamides. However, alkyl ether sulfates, amine oxides, alk (en) yl oligoglycosides or fatty alcohol polyglycol ethers are preferably used. The sum of all surfactants - based on the preparations - generally makes up 1 to 15 and preferably 5 to 10% by weight.

Alkyl ether sulfates are anionic surfactants which can be obtained by sulfating alkyl polyglycol ethers and subsequent neutralization. The alkyl ether sulfates which are suitable for the purposes of the invention follow the formula (III)

(III)

in which R ^{4 represents} an alkyl radical having 12 to 18, in particular 12 to 14, carbon atoms, n represents numbers 2 to 5, in particular 2 to 3 and X represents sodium or potassium. Typical examples are the sodium salts of sulfates of Ci2 / i4 coconut alcohol + 2, + 2,3- and + 3-EO adduct. The alkyl ether sulfates can have a conventional or narrow homolog distribution. The alkyl ether sulfates are preferably used in amounts of 1 to 8, preferably 1.5 to 6 and in particular 2 to 4% by weight, based on the composition.

Amine oxides are also known substances, which are occasionally attributed to the cationic, but usually the nonionic surfactants. They are prepared from tertiary fatty amines, which usually have either one long and two short or two long and one short alkyl radical, and are oxidized in the presence of hydrogen peroxide. The amine oxides which are suitable as surfactant ingredients for the purposes of the invention follow the formula (IV)

R ^β

(IV)

I in which R ^{5 represents} a linear or branched alkyl radical having 12 to 18 carbon atoms, and R ⁶ and R ⁷ independently of one another represent R ⁵ or an optionally hydroxy-substituted alkyl radical having 1 to 4 carbon atoms. Amine oxides of the formula (IV) are preferably used in which R ⁵ and R ^{6 are} C12 / 14- or Ci2m-cocoalkyl radicals and R ^{7 is} a methyl or a hydroxyethyl radical. Also preferred are amine oxides of the formula (IV) in which R ^{5 is} a C12 / 14 or C1218 cocoalkyl radical and R ⁶ and R ^{7 have} the meaning of a methyl or hydroxyethyl radical. The amine oxides are preferably used in amounts of 1.5 to 6, preferably 2 to 4,% by weight, based on the composition.

Alkyl and alkenyl oligogiycosides are known nonionic surfactants which follow the formula (V)

R ⁸ 0- [G] _p (V)

in which R ^{8 is} an alkyl and / or alkenyl radical having 4 to 22 carbon atoms, G is a sugar radical having 5 or 6 carbon atoms and p is a number from 1 to 10. The alkyl and / or alkenyl oligo glycosides, which are also suitable as surfactant ingredients, can be derived from aldoses or ketoses with 5 or 6 carbon atoms, preferably glucose. The preferred alkyl and / or alkenyl oligogiycosides are thus alkyl and / or alkenyl oligoglucosides. The index number p in the general formula (V) indicates the degree of oligomerization (DP), ie the distribution of mono- and oligoglycosides, and stands for a number between 1 and 10. While p must always be an integer in a given compound and especially here can assume the values p = 1 to 6, the value p for a certain alkyl oligoglycoside is an analytically determined arithmetic parameter, which usually represents a fractional number. Alkyl and / or alkenyl oligogiycosides with an average degree of oligomerization p of 1.1 to 3.0 are preferably used. From an application point of view, preference is given to those alkyl and / or alkenyl oligogiycosides whose degree of oligomerization is less than 1.7 and in particular between 1.2 and 1.4. The alkyl or alkenyl radical R ⁸ can be derived from primary alcohols having 4 to 11, preferably 8 to 10, carbon atoms. Typical examples are butanol, capronic alcohol, caprylic alcohol, capric alcohol and undecyl alcohol and their technical mixtures, as are obtained, for example, in the hydrogenation of technical fatty acid methyl esters or in the course of the hydrogenation of aldehydes from Roeien's oxosynthesis. Alkyl oligoglucosides of the chain length CS-CIQ (DP = 1 to 3) are preferred, which are obtained as a preliminary step in the separation of technical Cβ-Cis coconut fatty alcohol by distillation and are contaminated with a proportion of less than 6% by weight of Ci2 alcohol can as well as alkyl oligoglucosides based on technical Cg / n oxo alcohols (DP = 1 to 3). The alkyl or alkenyl radical R ⁸ can also differ from primary alcohols. fetch with 12 to 22, preferably 12 to 14 carbon atoms. Typical examples are lauryl alcohol, myristyl alcohol, cetyl alcohol, palmoleyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, elaidyl alcohol, petroselinyl alcohol, arachyl alcohol, gadoleyl alcohol, behenyl alcohol, erucyl alcohol, brassidyl alcohol and the technical mixtures described above, which can be obtained as described above, and the technical mixtures thereof. Alkyl oligoglucosides based on hardened C12 / 14 coconut alcohol with a DP of 1 to 3 are preferred. The glycosides are preferably used in amounts of 1.5 to 6, preferably 2 to 4% by weight, based on the composition.

The agents according to the invention can contain fatty alcohol polyglycol ethers of the formula (VI) as further surfactants,

R ⁹ 0 (CH ₂ CH ₂ 0) _n H (VI)

in which R ^{9 is} a linear or branched alkyl and / or alkenyl radical having 6 to 22 and preferably 12 to 18 carbon atoms and n is a number from 1 to 10. Typical examples are the addition products of on average 1 to 10 and preferably 2 to 5 moles of ethylene oxide with capron alcohol, caprylic alcohol, 2-ethylhexyl alcohol, capric alcohol, lauryl alcohol, isotridecyl alcohol, myristyl alcohol, cetyl alcohol, palmoleyl alcohol, stearyl alcohol, isostearyl alcohol, elaalyl alcohol, oleyl alcohol, oleyl alcohol Linolenyl alcohol, elaeostearyl alcohol, arachyl alcohol, gadoleyl alcohol, behenyl alcohol, erucyl alcohol and brassidyl alcohol and their technical mixtures, which are used, for example, in the high-pressure hydrogenation of technical methyl esters based on fats and oils or aldehydes from Roelen's oxosynthesis and as a monomer fraction in unsaturated fatty alcohols from dimerization . Addition products of 2 to 5 moles of ethylene oxide onto technical fatty alcohols with 12 to 18 carbon atoms, such as, for example, coconut, palm, palm kernel or tallow fatty alcohol, are preferred. The polyglycol ethers can have a conventionally broad, but also a narrow homolog distribution. With regard to an advantageous thickening, mixtures of fatty alcohol polyglycol ethers of linear and branched alkyl chains have proven to be advantageous. Particularly powerful preparations also contain mixtures of different fatty alcohol polyglycol ethers, in which one component has an HLB above and the other below 10. The polyglycol ethers are preferably used in amounts of 1 to 5, preferably 2 to 4% by weight, based on the composition. Thickener

The use of electrolytes is a very simple and inexpensive way of adjusting the viscosity. However, it has been found that the presence of chloride ions in addition to peroxide can lead to pitting on certain textiles as a result of chlorine formation. For this reason, a preferred embodiment of the invention uses organic thickeners which are, for example, polysaccharides, in particular xanthan gum, guar guar, agar agar, alginates and tyloses, carboxymethyl cellulose and hydroxyethyl cellulose, and also higher molecular weight polyethylene glycol mono- and diesters of fatty acids, polyacrylates (eg Carbopole® from Goodrich or Synthalene® from Sigma), polyacrylamides, polyvinyl alcohol and polyvinylpyrrolidone, clays, such as Laponite® from Southern Clay Products or Zeothix® from Huber, surfactants such as ethoxylated fatty acid glycerides, esters fatty acids with polyols such as pentaerythritol or trimethylolpropane, fatty alcohol ethoxylates with a narrow homolog distribution or alkyl oligoglucosides, which can be added to the agents in amounts of 0.1 to 2% by weight.

Industrial applicability

The agents according to the invention generally have a non-aqueous content of 5 to 35 and preferably 8 to 15% by weight and are particularly suitable for the treatment of textile fabrics, such as, for example, yarns, fabric webs and in particular textiles. They are usually used at low temperatures, i.e. in the cold wash area (approx. 15 to 25 ° C). The agents are not only characterized by excellent stain removal, they also reliably prevent deposits of lime and metal from being deposited on the fibers and thus prevent incrustation and yellowing. Although the actual use of the agents is aimed at removing stains during washing, they are also fundamentally suitable for other purposes in which bleaching solutions are used, for example for cleaning and disinfecting hard surfaces. In addition, the agents can contain fragrances and optical brighteners as well as antioxidants or preservatives, for example 2,6-di-tert-butyl-4-nrιethylphenol (BHT).

The optical brighteners which are used in microencapsulated form are preferably those which are otherwise not stable in preparations containing peroxide. Typical examples of suitable optical brighteners are derivatives of diaminostilbenedisulfonic acid or its alkali metal salts. Derivatives of 4,4'-diamino-2,2'- stilbene disulfonic acid (flavonic acid), such as, in particular, the salts of 4,4'-bis (2-anilino-4-moφholino-1, 3,5-triazinyl-6-amino) stilbene-2,2'-disulfonic acid or compounds of the same structure, which carry a diethanolamino group, a methylamino group, an anilino group or a 2-methoxyethylamino group instead of the morpholino group. Brighteners of the substituted diphenylstyryl type may also be present, for example the alkali salts of 4,4'-bis (2-sulfostyryl) diphenyl, 4,4'-bis (4-chloro-3-sulfostyryl) diphenyl, or 4- (4-chlorostyryl) -4 '- (2-sulfostyryl) diphenyls, methylumbelliferone, coumarin, dihydroquinolinone, 1, 3-diarylpyrazoline, naphthalic acid amide, benzoxazole, benzisoxalzol and benzimidazole systems linked via CH = CH bonds substituted pyrene derivatives and the like. Mixtures of the aforementioned brighteners can also be used. The potassium salt of 4,4'-bis (1, 2,3-triazolyl) - (2-) - stilbin-2,2-sulfonic acid, which is sold under the brand name Phorwite® BHC 766, is generally particularly preferred The microcapsules contain the optical brighteners in amounts of 1 to 95, preferably 10 to 60 and in particular 25 to 50% by weight, based on the weight of the capsule.

The fragrances which are used in microencapsulated form for the purposes of the invention are preferably those which are otherwise not stable in peroxide-containing preparations. Typical examples of suitable fragrances are mixtures of natural and synthetic fragrances. Natural fragrances are extracts of flowers (lily, lavender, rose, jasmine, neroli, ylang-ylang), stems and leaves (geranium, patchouli, petitgrain), fruits (anise, coriander, caraway, juniper), fruit peel (bergamot, lemon, Oranges), roots (mace, angelica, celery, cardamom, costus, iris, calmus), wood (pine, sandal, guaiac, cedar, rosewood), herbs and grasses (tarragon, lemongrass, sage, thyme), Needles and twigs (spruce, fir, pine, mountain pine), resins and balms (galbanum, elemi, benzoin, myrrh, olibanum, opoponax). Animal raw materials, such as civet and castoreum, are also suitable.

Typical synthetic fragrances are products of the ester, ether, aldehyde, ketone, alcohol and hydrocarbon type. Ester-type fragrances are e.g. Benzyl acetate, phenoxyethyl isobutyrate, p-tert-butylcyclohexyl acetate, linalyl acetate, dimethylbenzylcarbinyl acetate, phenylethyl acetate, linalyl benzoate, benzyl formate, ethylmethylphenylglycinate,

Allyl cyclohexyl propionate, styrallyl propionate and benzyl salicylate. The ethers include, for example, benzyl ethyl ether, the aldehydes, for example, the linear alkanals having 8 to 18 carbon atoms, citral, citronellal, citronellyloxyacetaldehyde, cyclamenaldehyde, hydroxycitronellal, lilial and bourgeonal, the ketones, for example, the jonones, α-isomethylionone and methylcedryl ketone the alcohols anethole, citronellol, eugenol, isoeugenol, geraniol, linalool, phenylethyl alcohol and teφineol, the hydrocarbons mainly include the terpenes and balms. However, preference is given to using mixtures of different fragrances which together produce an appealing fragrance.

Essential oils of lower volatility, which are mostly used as aroma components, are also suitable as fragrances, e.g. Sage oil, chamomile oil, clove oil, lemon balm oil, mint oil, cinnamon leaf oil, linden blossom oil, juniper berry oil, vetiver oil, oliban oil, galbanum oil, labolanum oil and lavandin oil. Bergamot oil, dihydromyrcenol, lilial, lyral, phenylethyl alcohol, α-hexylcinnamaldehyde, geraniol, benzylacetone, cyclamenaldehyde, linalool, boisambrene forte are preferably used.

Ambroxan, indole, hedione, sandelice, lemon oil, mandarin oil, orange oil, allylamyl glycolate, cyclovertal, lavandin oil, muscatel sage oil, ß-damascone, geranium oil bourbon,

Cyclohexyl salicylate, Vertofix Coeur, Vercitron, Iso-E-Super, Fixolide NP, Evernyl, Iraldein gamma, phenylacetic acid, geranyl acetate, benzyl acetate, rose oxide, Romilllat, Irotyl and Floramat used alone or in mixtures.

In addition to the substances mentioned above, it is of course also possible to use peroxide-resistant fragrances in microencapsulated form, for example: Citronellol (3,7-dimethyl-6-octen-1-ol), Dimethyloctanol (3,7-Dimethyloctanol-1) , Hydroxycitronellol (3,7-dimethyloctane-1,7-diol), mugol (3,7-dimethyl-4,6-octatrien-3-ol), myrcenol (2-methyl-6-methylene-7-octen-2 -ol), tetrahydromyrcenol (THM, 2,6-dimethyloctan-2-ol), Teφinolen (p-mentho-1, 4 (8) - diene), ethyl 2-methylbutyrate, phenylpropyl alcohol, galaxolide (1, 3.4 , 6.7 _I 8-hexahydro, 6,6,7,8,8, - hexamethylcyclopental-2-benzopyran, tonalide (7-acetyl-1, 1, 3,4,4, 6-hexamethyl-tetrahydronaphthalene), rose oxide , Linaloloxid, 2,6-Dimethyl-3-octanol, Tetrahydroethyllinalool, Tetrahydroethyllinalylacetat, o-sec-Butylcyclohexylacetat and Isolonediphorenepoxid as well as Isobomeal, Dihydroteφenöl, Isobornylacetat, Dihydroteφenylacetat). Other suitable fragrances are the substances mentioned in columns 3 and 4 of European patent application EP 0622451 A1 (Procter & Gamble). As a rule, the microcapsules contain the fragrances in amounts of 1 to 95, preferably 50 to 80 and in particular 60 to 70% by weight, based on the weight of the capsule.

The agents according to the invention are produced by stirring. If necessary, the product obtained can be decanted or filtered to remove foreign particles and / or agglomerates. The agents also have a viscosity - measured at 20 ° C. in a Brookfield viscometer (spindle 1, 10 rpm) - above 100, preferably above 200 mPas. Examples

Various hydrogen peroxide solutions were mixed with color pigments in microcapsular form and optionally also with pure color pigments. Examples 1 to 6 of the preparations according to the invention are summarized in Table 1.

Table 1

Bleach composition

¹ > Car opol 497 (Goodpin);

² > methylglycinediacetic acid tri-sodium salt (Fa.BASF);

³ > Shell material: sodium alginate

Claims

claims

1. Peroxide-containing preparations, characterized in that they contain colorants in a microencapsulation.

2. Preparations according to claim 1, characterized in that the preparations additionally contain non-microencapsulated coloring agents.

3. Preparations according to claims 1 and / or 2, characterized in that the preparations and microcapsules contain the same or different colorants.

4. Preparations according to at least one of claims 1 to 3, characterized in that - based on the agent - contain 0.5 to 10 wt .-% hydrogen peroxide.

5. Preparations according to at least one of claims 1 to 4, characterized in that they contain - based on the agent - 0.1 to 10 wt .-% microcapsule containing colorants.

6. Preparations according to at least one of claims 1 to 5, characterized in that they contain microcapsules, the coating substance of which is selected from the group formed by gum arabic, agar, agarose, maltodextrins, alginic acid, alginates, fats, fatty acids, cetyl alcohol , Collagen, chitosan, lecithin, gelatin, albumin, shellac, polysaccharides, celluloses, cellulose esters, celulose ethers, starch ethers, starch esters, polyacrylates, polyamides, polyvinyl alcohols and poly vinyl pyrrolidone.

7. Preparations according to at least one of claims 1 to 6, characterized in that they contain microcapsules, the diameter of which is 0.01 to 10,000 microns along its greatest spatial extent.

8. Preparations according to at least one of claims 1 to 7, characterized in that they further contain sequestering agents, surfactants and organic thickeners.

9. Preparations according to at least one of claims 1 to 8, characterized in that they contain microcapsules which - based on the weight of the capsules - contain 1 to 95 wt .-% colorant.

0. Preparations according to at least one of claims 1 to 9, characterized in that they have a Brookfield viscosity above 100 mPas.