ES2297606T3 - WHITENING COMPOSITION THAT INCLUDES AN IMPEDED CYCLINE AMINE. - Google Patents

Abstract

A liquid bleaching composition comprising a hypohalite bleach, an impaired cyclic amine and a compound selected from the group consisting of bleach unstable brighteners, bleach unstable coloring agents and mixtures thereof, wherein said hypohalite bleach is an alkali metal and / or alkaline earth metal hypochlorite.

Description

Bleaching composition comprising an amine Cyclic prevented.

Technical field

The present invention relates to compositions bleaching, in particular to bleaching compositions of type hypohalite, which can be used to treat different surfaces including, but not limited to, fabrics, garments of dress, carpets and the like, as well as hard surfaces such as walls, tiles, floors, glass, bathroom surfaces, kitchen surfaces, WC and dishes.

Background of the invention

Compositions containing bleach for bleach different surfaces, e.g. eg, tissues, are good known in the art. Among the different compositions of available bleaching, often those based on a bleaching with hypohalite bleach, such as hypochlorite, are preferred, mainly for reasons of ability to Whitening.

It is desirable to add other ingredients to the compositions containing hypohalite bleach. From done, to improve the whitening action of these bleaching compositions it may be beneficial to add a brightener (also known as whitening agent fluorescent). In addition, to improve the aesthetics of these bleaching compositions can be considered adding a dye or a pigment

However, an inconvenience associated with the use of compositions containing hypohalite bleach, p. eg, hypochlorite type compositions, is that some additional ingredients added in addition to bleach type Hypohalito can be decomposed by the bleach. In fact, hypohalite bleaches are oxidizing agents and some additional ingredients may have a tendency to attacks and in some cases a partial decomposition or even complete by these oxidizing agents. Therefore, it turns out difficult to incorporate into compositions containing bleach hypohalite type some additional ingredients such as certain brighteners, certain pigments and / or certain dyes. The additional ingredients that tend to partial decomposition or even complete in compositions containing bleach hypohalite type are referred to herein as "unstable bleach" ingredients, while additional ingredients that are not prone to decomposition partial or even complete in the compositions containing hypohalite bleach are mentioned herein memory as "bleach stable" ingredients.

A way to avoid partial decomposition or even full of additional ingredients present in the compositions containing hypohalite bleach is incorporate stabilizer systems in the compositions of Whitening. In fact, the addition to the compositions containing hypohalite bleach of a radical inactivator or other stabilizing agent to prevent or at least reduce the breakdown of other ingredients, in particular bleach unstable ingredients, present in the bleaching compositions. For example in EP-A-0 668 345 and EP-A-1 001 010 are described bleaching compositions comprising a bleach of type hypohalite and a radical inactivator. However, although these stabilizing systems and especially radical inactivators they are able to stabilize certain unstable ingredients by Additional bleach, such as surfactants, has been discovered that bleach unstable brighteners, pigments unstable to bleach and / or unstable dyes to bleach they are especially prone to attacks by bleach hypohalite type and therefore are extremely difficult to be stably incorporated into bleaching compositions that They comprise known stabilizer systems.

In fact, although the systems described in the technique provide a stabilization of other ingredients unstable to bleach in compositions containing hypohalite bleach, it has been discovered that the stabilization of bleach unstable brighteners and / or bleach unstable coloring agents (such as pigments and / or dyes) can be further improved. In fact, especially the stabilization of these unstable brighteners to bleach and / or bleaching agents unstable to bleach (such as pigments and / or dyes) during a period of Prolonged storage ("during storage") can be further improved.

It is, therefore, an object of the present invention provide a bleaching composition containing hypohalite bleach comprising a compound selected from the group consisting of unstable brighteners to bleach and unstable coloring agents to bleach and mixtures thereof, wherein the decomposition of said Compound is significantly reduced or even avoided.

It has now been discovered that this object can be achieve by a liquid bleaching composition that comprises a hypohalite bleach, a cyclic amine prevented and a compound selected from the group consisting of unstable brightener brighteners and coloring agents unstable to bleach and mixtures thereof, where said hypohalite bleach is an alkali metal hypochlorite and / or alkaline earth metal.

Advantageously, the bleaching composition as described herein also allows reducing of meaningful way or even inhibit the breakdown of a compound selected from the group consisting of brighteners unstable to bleach and unstable coloring agents bleach and mixtures thereof during storage said bleaching composition.

Another advantage of bleaching compositions according to the present invention is that they have an excellent capacity  of bleaching. In particular, the compositions herein invention provide excellent bleaching capacity when They are used in any laundry application ("tissue treatment applications"), p. eg, as a laundry detergent, a laundry additive and / or a pretreatment for washing clothes.

Another advantage of the compositions herein invention is that they are suitable for cleaning of different types of tissues including natural tissues (e.g., tissues made of cotton, viscose, linen, silk or wool), synthetic fabrics, such such as those made of polymeric fibers of synthetic origin as well as fabrics made of natural and synthetic fibers.

Another advantage of bleaching compositions of the present invention is that said bleaching compositions are also suitable for bleaching different types of surfaces including hard surfaces such as floors, walls, tiles, glass, kitchen surfaces, bathroom surfaces, WC and / or dishes and the like, in addition to for treatment applications of aforementioned tissues.

In EP-A-1 391 501 describes a method to stabilize the viscosity of a composition containing hypochlorite bleach using a selected group of hindered amines. However, this method It does not contain any indication that the amines prevented are suitable for stabilizing brighteners and / or coloring agents unstable to bleach. Similarly, in WO 01/07550 describes a bleaching composition comprising an amine prevented from claiming to reduce tissue damage dyed

In EP-A-0 315 204 describes a bleaching composition comprising a hindered amine compound and a halogen-containing compound active but does not describe a composition in which the bleach of hypohalite type be an alkali metal and / or metal hypochlorite alkaline earth.

US-5 057 562 describes a process to stabilize dyes using hindered amines.

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Summary of the invention

The present invention relates to a liquid bleaching composition comprising a bleach of type  hypohalite, a hindered cyclic amine and a selected compound from the group consisting of bleach unstable brighteners and bleach unstable coloring agents and mixtures of themselves, wherein said hypohalite bleach is a alkali metal hypochlorite and / or alkaline earth metal.

The present invention also relates to a method to reduce or prevent the decomposition of a compound selected from the group consisting of unstable brighteners bleach, bleach unstable coloring agents and mixtures thereof, in a bleaching composition comprising a hypohalite bleach, where the method comprises incorporate into the bleaching composition an inhibited cyclic amine, wherein said hypohalite bleach is a hypochlorite of alkali metal and / or alkaline earth metal.

In another embodiment of the present invention provides a process to treat a tissue comprising the stage of applying the liquid bleaching composition herein invention on the tissue to be treated.

In another aspect, the present invention is refers to the use, in a bleaching composition comprising a hypohalite bleach, of a cyclic amine prevented from reduce or prevent the decomposition of a compound selected from group consisting of bleach unstable brighteners, bleaching unstable coloring agents and mixtures of themselves, in the bleaching composition, wherein said bleach hypohalite type is an alkali metal and / or metal hypochlorite alkaline earth.

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Detailed description of the invention Bleaching composition

The bleaching compositions herein invention are formulated as liquids, including those that are shaped of gel and paste. The bleaching compositions are preferably, although not necessarily, formulated as aqueous compositions. Preferred liquid bleaching compositions herein invention are aqueous and therefore can comprise preferably water, more preferably they can comprise water in an amount of 60% to 98%, even more preferably from 80% to 97% and most preferably from 85% to 97%, by weight of the composition total.

Preferably, the compositions of the The present invention is thickened. Thickening can achieved by adding thickener components such as surfactants, more especially anionic surfactants.

pH

Liquid compositions according to the present invention are preferably alkaline compositions. The pH of the liquid compositions of the present invention, as is, is preferably from 10 to 14, more preferably from 11 to 14, even more preferably from 12 to 13.7 and most preferably from 12.5 to 13.5, measured at 25 ° C. In this alkalinity range you get an optimal level of stability and performance of the hypohalite, as well as of whiteness and / or tissue safety.

Therefore, the compositions herein invention may also comprise an acid or a source of alkalinity to adjust the pH appropriately. Sources Suitable alkalinity are caustic alkalis such as sodium hydroxide, potassium hydroxide and / or lithium hydroxide, and / or alkali metal oxides such as sodium oxide and / or oxide Potassium A preferred source of alkalinity is an alkali caustic, more preferably sodium hydroxide and / or hydroxide potassium Typical levels of this alkalinity source, if is present, they are from 0.1% to 1.5% by weight, preferably from 0.5% to 1.5% by weight of the composition.

Hypohalite bleach

As an essential first ingredient, bleaching compositions of the present invention comprise a hypohalite bleach where said bleach type hypohalite is an alkali metal and / or metal hypochlorite alkaline earth. More preferably, said type bleach hypohalite is an alkali metal and / or metal hypochlorite alkaline earth selected from the group consisting of hypochlorite of sodium, potassium hypochlorite, magnesium hypochlorite, hypochlorite of lithium and calcium hypochlorite, and mixtures thereof. Even more preferably, said hypohalite bleach is hypochlorite of sodium.

Preferably, bleaching compositions liquids of the present invention comprise said bleach of hypohalite type so that the active halide content (for hypochlorite: AvCl2) in the composition is 0.01% to 20% in weight, more preferably from 0.1% to 10% by weight, even more preferably from 0.5% to 6% and most preferably from 1% to 6% in Weight of the composition.

Cyclic amine prevented

As a second essential element the Compositions of the present invention comprise a cyclic amine prevented as a general stabilizer. Preferably, the amine Cyclic prevented has the general formula:

one

where X_ {1}, X_ {2}, X_ {3} and X_ {4}, independently or all together, represent methyl or ethyl; R1 is H, methyl, ethyl, oxyl, hydroxyl or group alkoxy; and R2 is H, hydroxyl, alkoxy or oxycarbonyl

In the context of the present invention, the hindered cyclic amines are also mentioned as hindered cyclic hydroxylamines or cyclic nitroxyl compounds handicapped

In a preferred embodiment, X2, X3 and X_ {4} are identical and are typically selected so that be methyl. R_ {1} is typically selected from the group of oxyl and hydroxyl. Preferably, R 1 represents oxyl group. R2 is typically selected from the hydroxyl group, alkoxy and oxycarbonyl. In a preferred embodiment, R2 is selected preferably to be hydroxyl.

Preferably, said hindered cyclic amine is selected from the group consisting of 4-hydroxy-2,2,6,6-tetramethylpiperidine; 4-methoxy-2,2,6,6-tetramethylpiperidine; 4-ethoxy-2,2,6,6-tetramethylpiperidine; 4-propoxy-2,2,6,6-tetramethylpiperidine 1-hydroxy-2,2,6,6, -tetramethyl-4-hydroxypiperidine; 1-hydroxy-2,2,6,6, -tetramethyl-4-methoxypiperidine; 1-hydroxy-2,2,6,6, -tetramethyl-4-ethoxypiperidine; 1-hydroxy-2,2,6,6, -tetramethyl-4-propoxypiperidine; bis (1-hydroxy-2,2,6,6-tetramethylpiperidin-4-yl) sebacate; 1-oxyl-2,2,6,6, -tetramethylpiperidine; 1-oxyl-2,2,6,6-tetramethyl-4-hydroxypiperidine; 1-oxyl-2,2,6,6-tetramethyl-4-hydroxypiperidine acetate; 1-oxyl-2,2,6,6-tetramethyl-4-hydroxypiperidine propanoate; 1-oxyl-2,2,6,6-tetramethyl-4-hydroxypiperidine butyrate; 1-oxyl-2,2,6,6-tetramethyl-4-hydroxypiperidine pentanoate; 1-oxyl-2,2,6,6-tetramethyl-4-hydroxypiperidine hexanoate; 1-oxyl-2,2,6,6-tetramethyl-4-hydroxypiperidine heptanoate; 1-oxyl-2,2,6,6-tetramethyl-4-hydroxypiperidine octanoate; 1-oxyl-2,2,6,6-tetramethyl-4-hydroxypiperidine nonanoate; 1-oxyl-2,2,6,6-tetramethyl-4-hydroxypiperidine decanoate; 1-oxyl-2,2,6,6-tetramethyl-4-hydroxypiperidine undecanoate; 1-oxyl-2,2,6,6-tetramethyl-4-hydroxypiperidine dodecanoate; bis (1-oxyl-2,2,6,6-tetramethylpiperidin-4-yl) propandioate; bis (1-oxyl-2,2,6,6-tetramethylpiperidin-4-yl) butandioate; bis (1-oxyl-2,2,6 pentandioate,
6-tetramethylpiperidin-4-yl); bis (1-oxyl-2,2,6,6-tetramethylpiperidin-4-yl) hexanedioate; bis (1-oxyl-2,2,6,6-tetramethylpiperidin-4-yl) heptandioate; bis (1-oxyl-2,2,6,6-tetramethylpiperidin-4-yl) octandioate; bis (1-oxyl-2,2,6,6-tetramethylpiperidin-4-yl) nonandioate; bis (1-oxyl-2,2,6,6-tetramethylpiperidin-4-yl) sebacate; bis (1-oxyl-2,2,6,6-tetramethylpiperidin-4-yl) dodecandioate; 1-oxyl-2,2,6,6-tetramethyl-4-methoxypiperidine; 1-oxyl-2,2,6,6-tetramethyl-4-ethoxypiperidine; 1-oxyl-2,2,6,6-tetramethyl-4-propoxypiperidine and a mixture thereof.

In a preferred embodiment, said amine Cyclic prevented is selected from the group consisting of 4-hydroxy-2,2,6,6-tetramethylpiperidine; 1-hydroxy-2,2,6,6-tetramethyl-4-hydroxypiperidine; 1-oxyl-2,2,6,6, -tetramethylpiperidine; 1-oxyl-2,2,6,6-tetramethyl-4-hydroxypiperidine.

In a very preferred embodiment, said amine cyclic prevented is 1-oxyl-2,2,6,6, -tetramethyl-4-hydroxypiperidine  (ie X_ {1}, X_ {{2}), X_ {3} and X_ {4} are methyl; R_ {1} it is oxyl and R2 is hydroxyl). He 4-hydroxy-2,2,6,6, -tetramethyl-piperidinyloxy  suitable is marketed by 3V Sigma with the trade name Tempoxy LO®, by Aldrich or Lancaster with the registered trademark 4-hydroxy-TEMPO.

In another very preferred embodiment, said amine cyclic prevented is 1-hydroxy-2,2,6,6, -tetramethyl-4-hydroxypiperidine  (ie X_ {1}, X_ {{2}), X_ {3} and X_ {4} are methyl; R_ {1} it is hydroxyl and R2 is hydroxyl). The 1-hydroxy-2,2,6,6, -tetramethyl-4-hydroxypiperidine suitable is marketed by Ciba with the trade name Tinogard® SF-X.

Typically, the bleaching composition of The present invention may comprise from 0.001% to 5%, preferably from 0.005% to 2.5%, more preferably from 0.01% to 1.0% and most preferably from 0.02% to 0.05%, by weight of the total composition of said cyclic amine prevented.

Compound selected from the group consisting of brighteners unstable to bleach and unstable coloring agents bleach

As a third essential element the Compositions of the present invention comprise a compound selected from the group consisting of unstable brighteners to bleach and unstable coloring agents to bleach and mixtures thereof.

A compound "unstable to bleach" means herein that said compound will be seen at less partial or even totally decomposed when it is incorporated into a composition containing bleach type hypohalite free of any stabilizer system.

In practice bleaching compositions described herein are not used immediately After its manufacture. In fact, these bleaching compositions After production they are sent to your point of sale, stored for some time at the point of sale (storage in shelves) and finally stored by the end user of said bleaching compositions before use them These prolonged storage conditions after manufacturing the bleaching compositions of the This invention must be taken into account when determine if an ingredient or compound is stable to bleach or not.

The bleach stability of a compound can be assessed in the laboratory using a test of rapid aging ("RAT"). This RAT test simulates laboratory conditions storage conditions prolonged after the manufacture of the compositions of bleaching of the present invention. In a RAT they are used aqueous compositions comprising 3% active chlorine by weight of the composition (3.15% sodium hypochlorite) and 0.02% by weight of brightener to be analyzed to determine stability to bleach or 0.002% by weight of dye to be analyzed to determine bleach stability. The compositions they are stored for 10 days at 50 ° C ± 0.5 ° C and after 10 storage days the activity of said compound.

The polishing expression "unstable at bleach ", therefore, means herein a brightener that typically experiences more than 80% loss of activity at 50 ° C ± 0.5 ° C after 10 days of storage with respect to its activity in a composition "fresh" comprising 0% active halide by weight of the composition (to avoid immediate decomposition of the compound) and 0.02% by weight of brightener.

The term "dye" means in the present a pigment and / or a dye and / or other materials used to provide color to the liquid compositions of The present invention. Coloring agents usually insoluble in water are called pigments and agents Water soluble dyes are called dyes. Without However, in the state of the art these definitions are not followed in all cases. Therefore, to avoid confusion, the term "dye" encompasses all means available for provide color to a liquid composition.

The expression "dye unstable to bleach "must therefore be understood herein as a dye that typically experiences a loss of dye or pigment activity of more than 80% at 50 ° C ± 0.5 ° C after 10 days of storage with respect to its activity in a "fresh" composition comprising 0% active halide in composition weight (to avoid immediate decomposition of the  compound) and 0.002% by weight of dye or pigment.

The term "activity" means in the present memory in the case of a brightener its fluorescence and in the case of coloring agents their ability to provide Color to a composition.

To assess the loss of activity due to bleach in a given brightener, the fluorescence under a UV lamp of a composition "aged" comprising 3% active chlorine by weight of the composition (3.15% sodium hypochlorite) and 0.02% by weight of said brightener and aged in a RAT as described above, with fluorescence under a UV lamp of a "fresh" composition comprising 0% active halide by weight of the composition and 0.02% by weight of said compound.

Loss of activity due to bleach in A brightener can be judged by visual scoring. The visual scoring can be performed by a group of panelists experts using panel scoring units (PSU) and a PSU scale with a range of 0 (no noticeable difference of fluorescence in the "aged" composition against the "fresh" composition) to 5 (a difference clearly perceptible fluorescence in the "aged" composition versus the "fresh" composition). For example, a score PSU of 1 means a loss of fluorescent activity of 20% in an "aged" composition with respect to the activity of a "fresh" composition.

Alternatively, the loss of activity due to the brightener of a brightener can be assessed using HPLC analysis (high pressure liquid chromatography) where the rinse aid levels are measured quantitatively before and after a RAT.

To assess the loss of activity due to bleach of a certain dye (such as a pigment or dye), the color of an "aged" composition that comprises 3% active chlorine by weight of the composition (3.15% of sodium hypochlorite) and 0.002% by weight of said dye and aged in a RAT, as described above, with the color of a "fresh" composition comprising 0% active halide by weight of the composition and 0.002% by weight of said dye.

Loss of activity due to bleach a certain dye can be assessed by scoring visual. The visual score can be performed by a group of expert panelists using panel scoring units (PSU) and a PSU scale in the range of 0 (no difference perceptible color in the "aged" composition with regarding the composition "fresh") to 5 (clearly difference perceptible color in the "aged" composition with regarding the "fresh" composition). For example, a PSU score of 1 means a loss of coloring activity of 20% in an "aged" composition with respect to activity of a "fresh" composition.

Alternatively, the loss of activity due to the bleach of a certain dye can be assessed using a spectrometric analysis. So specific, the instrument used is a Lambda spectrometer UV / VIS by Perkin Elmer.

Bleach unstable brighteners

The compositions of the present invention they can comprise a bleach unstable brightener according to It has been previously defined herein. Saying unstable brightener brightener can be incorporated into a 0.001% to 1.0% level, preferably 0.005% to 0.5%, plus preferably from 0.005% to 0.3% and most preferably from 0.008% at 0.1%, by weight of the composition.

Examples of unstable brighteners Suitable bleach include: 4,4'-bis- (2-sulfoestiryl) -biphenyl  disodium 4,4'-bis [(4,6-di-anilino-s-triacin-2-yl) -amino] -2,2'-stilbenedisulfonate disodium and 4,4'-bis - [(4-anilino-6-morpholin-s-triacin-2-yl) -amino] -2,2'-stilbenedisulfonate, 4,4'-bis - [(4-anilino-6-bis-2 (2-hydroxyethyl) -amino-s-triacin-2-yl) -amino] -2,2'-stilbene disulfonate and mixtures thereof.

In addition, unstable brighteners to Suitable bleach useful in the present invention are those which have the structural formula:

2

where R_ {1} is selected from anilino, N-2-bis-hydroxyethyl and NH-2-hydroxyethyl; R2 is select from N-2-bis-hydroxyethyl, N-2-hydroxyethyl-N-methylamino, morpholino, chlorine and amino; and M is a salt-forming cation like, for example sodium or potassium.

When, in the previous formula R_ {1} is anilino, R2 is N-2-bis-hydroxyethyl and M is a cation such as sodium, the brightener is acid 4,4'-bis - [(4-anilino-6- (N-2-bis-hydroxyethyl) -s-triazin-2-yl) amino] -2,2'-stilbendisulfonic acid  and the disodium salt. This particular type of brightener is marketed under the trade name Tinopal-UNPA-GX® by Ciba Specialty Chemicals

When in the previous formula R_ {1} is anilino, R2 is N-2-hydroxyethyl-N-2-methylamino and M is a cation such as sodium, the brightener is salt acid disodium 4,4'-bis [(4-anilino-6- (N-2-hydroxyethyl-N-methylamino) -s-triazin-2-yl) amino] 2,2'-stilbendisulfonic acid.  This particular type of brightener is marketed with the Trade name Tinopal 5BM-GX® by Ciba Specialty Chemicals

When, in the above formula, R_ {1} is anilino, R2 is morpholino and M is a cation such as sodium, the brightener is the acidic sodium salt 4,4'-bis [(4-anilino-6-morfilino-s-triazin-2-yl) amino] 2,2'-stilbendisulfonic acid.  This particular type of brightener is marketed with the trade name Tinopal AMS-GX® by Ciba Specialty Chemicals

Another bleach unstable brightener Suitable is Optiblanc BRB® marketed by 3V sigma.

Other acid derivatives stilbene-2,2'-disulfonic substituted also include 4,4'-bis- (2-sulfoestiryl) -biphenyl  disodium, marketed by Ciba Specialty Chemicals under the brand Registered Tinopal CBS-X®, or other brighteners hydrophilic, such as 4,4'-bis - [(4-anilino-6-bis-2 (2-hydroxyethyl) -amino-s-triacin-2-yl) -amino] -2,2'-stilbenedisulfonate,  also marketed by Ciba Specialty Chemicals.

Bleach unstable brighteners preferred in the present invention are selected from the group that consists in: 4,4'-bis- (2-sulfoestiryl) -biphenyl disodium (marketed under the trade name Tinopal CBS-X® by Ciba Specialty Chemicals); 4,4'-bis - [(4,6-di-anilino-s-triacin-2-yl) -amino] -2,2'-stilbenedisulfonate  disodium (marketed by Ciba Specialty Chemicals); 4,4'-bis - [(4-anilino-6-morpholin-s-triacin-2-yl) -amino] -2,2'-stilbenedisulfonate  (marketed by Ciba Specialty Chemicals); Y 4,4'-bis - [(4-anilino-6-bis-2 (2-hydroxyethyl) -amino-s-triacin-2-yl) -amino] -2,2'-stilbenedisulfonate  (marketed by Ciba Specialty Chemicals); and mixtures of same.

In a very preferred embodiment according to the present invention, the unstable brightener to the bleach of the present invention is 4,4'-bis- (2-sulfoestiryl) -biphenyl disodium He 4,4'-bis- (2-sulfoestiryl) -biphenyl  disodium is marketed under the trade name Tinopal CBS-X® by Ciba Specialty Chemicals.

Therefore, the expression "stable brightener to bleach "means a brightener that typically experience a loss of activity equal to or less than 80% for the brightener at 50 ° C ± 0.5 ° C after 10 days of storage with respect to its activity in a composition "fresh" comprising 0% active halide by weight of the composition (to avoid immediate decomposition of the compound) and 0.02% by weight of brightener.

Examples of stable brighteners bleach include benzoxazole, 2,2 '- (thiophenyldil) bis It has the formula C18H10N2O2S, marketed by Ciba Specialty Chemicals with the registered trademark Tinopal SOP®. Another example of This brightener is bis (sulfobenzofuranyl) biphenyl, marketed by Ciba Specialty Chemicals with the registered trademark Tinopal PLC®.

Bleach unstable coloring agents

The compositions of the present invention may comprise a bleach unstable dye as has been defined above herein. Said dye unstable to the bleach can be incorporated at a level of 0.001% at 1.0%, preferably from 0.005% to 0.5%, more preferably from 0.005% to 0.3% and most preferably 0.008% to 0.1%, by weight of the composition.

Examples of unstable coloring agents Suitable bleach include: copper phthalocyanine blue (marketed under the trade name Dye Pigmosol Blue 6900® by BASF), accosperse cyan blue GT, Aqualine blue, Arlocyanine blue PS, Bahama blue BC, Bermuda blue, Blue GLA, phthalocyanine blue in Alpha shape, Blue toner GTNF BT 4651, Calcotone blue GP, Ceres blue BHR, Chromatex blue BN, Chromofine blue 4920, C.I. 74160, C.I. pigment blue 15, Congo blue B 4, copper (II) phthalocyanine, copper phthalocyanine, copper beta-phthalocyanine, copper phthalocyanine (2+), alpha-phthalocyanine copper, copper beta-phthalocyanine, blue copper phthalocyanine, copper tetrabenzoporphracin, Cromofine blue 4950, Cromophtal blue 4G, cupric phthalocyanine, Cyan blue BNC 55-3745, Cyanine blue BB and others, Cyan peacock blue G, Dainichi cyanine blue B, Daltolite fast blue B, Duratint blue 1001, EM blue NCB, Euvinyl blue 702, Fastogen blue 5007, Fastolux blue, Fastolux peacock blue, Fenalac blue B disp, Franconia blue A 4431, Graphtol blue BL, Helio blue B, Helio fast blue B, Heliogen blue and others, Hostaperm blue AFN, Irgalite blue BCA, Irgalite blue LGLD, Irgalite fast brilliant blue BL, Irgaplast blue RBP, Isol fast blue B, Isol fast blue toner BT, Isol phthalo blue B, Japan blue 404, LBX 5, Leophoton, ERPC Lioconductor, Lionol blue E, Liophoton blue ER, Liophoton ERPC, Liophoton TPH 278, Lufilen blue 70-8100, Lumatex blue B, Lutetia fast cyanine R, Lutetia percyanine BRS, Microlith blue 4GA, Monarch blue G, Monarch blue toner NCNF X 2810, Monastral blue, Monastral blue B, Monastral fast blue, Monastral fast paper blue B, Monolite fast blue BNVSA, No 2712 cyanine blue B, Nyastral blue BC, Nylofil blue BLL, Ocean blue, Palomar blue B 4773, Peacoline blue, Permaline blue, Permanent blue BT 398, Phthalo blue B base, (phthalocyaninate) copper, copper alpha-phthalocyanine blue, blue phthalocyanine, beta-phthalocyanine blue, Phtalocyanine light blue VK, Phthalogen brilliant blue IF 3GK, Phthalogen turquoise IFBK, Pigment blue ciba 376S, Pigment fast blue BN, Pigment sky blue phtalocyanine VK, Plastol blue B, Polymo blue FFG, PV fast blue A 2R, PV fast blue B, Ramapo blue, Renol blue B 2G-H, Resamine fast blue B, Resanine blue B 4703, Resino blue F, Rubber blue BKA, Sandorin blue 2GLS, Sanyo cyanine blue BN, Segnale light turquoise BDS, Siegle fast blue BS, Siegle fast blue LBGO, Skyline blue B4712, Solastral blue B, Solfast sky blue, Sumkiaprint cyanine blue GN-O, Sumitone cyanine blue HB, Sunfast blue, Suprapal green 3X4A041, Synthaline blue, Tetor blue, Thalo blue # 1, Turquoise blue base G, Unisperse blue G-E, Versal blue A, Iragon Blue DBL86, Dispers blue 69-007 and Hostafine Blue B2G.

Bleaching agents unstable to bleach preferred in the present invention are selected from the group that consists of: copper phthalocyanine blue (marketed with the trade name Dye Pigmosol Blue 15® by BASF); Direct Blue 86 (marketed under the trade name Iragon Blue DBL86® by Clariant); Pigment Blue 15: 1 (marketed under the name Commercial Disperse Blue 69-007® by BASF) and Pigment Blue 15: 3 (marketed under the trade name Hostafine Blue B2G® by Clariant); and mixtures thereof.

In a very preferred embodiment according to the present invention, the bleach unstable dye of the The present invention is copper phthalocyanine blue. The blue of Copper phthalocyanine is marketed under the trade name Dye Pigmosol Blue 15® by BASF.

Therefore, the expression "dye stable to bleach "means a dye that typically experience a loss of activity equal to or less than 80% for the dye or pigment at 50 ° C ± 0.5 ° C after 10 days of storage with respect to its activity in a composition "fresh" comprising 0% active halide by weight of the composition (to avoid immediate decomposition of the compound) and 0.002% by weight of the dye. An example of a stable dye the bleach includes ultramarine blue that is marketed as C.I. Pigment Blue 29; C.I. 77007 by Holliday Pigments. Other Stable bleach dye is CI 69825, known with the name of C.I. Vat Blue and C.I. Pigment Blue 64.

Now it has been surprisingly discovered that the hindered cyclic amine according to the present invention is capable to stabilize unstable brighteners to bleach and agents bleach unstable dyes that are especially sensitive to attack by hypohalite bleaches and, for therefore extremely difficult to be incorporated stably to bleaching compositions that comprise them. In fact, the hindered cyclic amine of the present invention has an action of stabilization significantly better for brighteners unstable to bleach and unstable coloring agents bleach in compositions containing bleach type hypohalite with respect to radical inactivators or agents currently known stabilizers, such as benzoic acid, p-toluenesulfonate, acid m-methoxybenzoic acid and sodium m-anisic.

Without pretending to impose any theory, it is believed that the specific hindered amine of the present invention does not act simply as a radical inactivator in the composition of bleaching of the present invention but also acts as a stabilizer of other products such as intermediate products ionic formed during oxidative degradation of unstable brightener brighteners and / or coloring agents unstable to bleach in compositions containing hypohalite bleach.

In addition, it has been surprisingly discovered that the specific hindered cyclic amine according to the present invention produces a significant reduction of chlorine loss available of the compositions of the present invention during the storage of them. The% loss of available chlorine is can be measured using, for example, the method described in "Analyses des Eaux et Extraits de Javel" by "La chambre syndicale nationale de L'eau de Javel et des produits connexes ", pages 9-10 (1984). This method consists in measuring the hypohalite bleach available in the compositions fresh, that is, just after being prepared, and in these same compositions after 10 days at 50 ° C.

Optional chelating agents

In the compositions of the present invention, the presence of a chelating agent in addition to the inactivator of Radicals is not mandatory, but it is very preferred.

It is believed that the presence of a chelating agent in the compositions of the present invention also contributes to the stability of bleach unstable brighteners, pigments and / or dyes, especially after prolonged periods of storage as well as safety for tissues and whiteness of the tissues.

Suitable chelating agents may be any of those known to those skilled in the art such as selected from the group comprising chelating agents of type phosphonate, phosphate chelating agents, chelating agents polyfunctionally substituted aromatics, acids ethylenediamino-N, N'-disuccinics, or mixtures of the same.

Chelating agents may be desired in the compositions of the present invention, preferably the agents phosphate type chelants such as phytic acid, since they also contribute to the advantage provided by the inactivators of radicals of the present invention further improving the brightener stability, thus providing an action Effective whiteness in any laundry application after the aging of the compositions, that is, after prolonged storage period

Phosphonate type chelating agents Suitable for use in the present invention may include 1-hydroxy ethane diphosphonates (HEDP) of metals alkaline, alkylene poly (alkylene phosphonate) as well as compounds of aminophosphonate, including acid amino-aminotri (methylene phosphonic) (ATMP), nitrile-trimethylene phosphonates (NTP), ethylenediamine tetra methylene phosphonates and diethylene triamino pentamethylene phosphonates (DTPMP). Phosphonate type compounds may be present in its acid form or as salts of different cations in some or all its acid functions. Phosphonate type chelating agents Preferred for use in the present invention are the diethylene triamino penta methylene phosphonate  (DTPMP) and 1-hydroxy-ethane diphosphonate (HEDP). These phosphonate type chelating agents are marketed by Monsanto with the registered name DEQUEST®.

Suitable phosphate chelating agents for use in the compositions of the present invention described in EP-A-0 867 502 in the section entitled "The phosphate ingredient" and these ingredients are in particular incorporated as a reference in the present memory, especially for its bleaching advantage of tissues (i.e. yellowing inhibition effect) and / or tissue safety advantage. All the ingredients of phosphate described in EP-A-0 867 502 in the section entitled "The phosphate ingredient" are suitable for use in the present invention. The agents Preferred phosphate type chelators for use herein invention are linear phosphate ingredients, wherein R in the formula of the section entitled "The phosphate ingredient" of EP-A-0 867 502 is M and where n is 1 (pyrophosphate) or n is 2 (tripolyphosphate (STPP)), with maximum preference where n is 2. The most common available form of These phosphates is where M is sodium. In fact, chelating agents of the phosphate type preferred for use in the compositions of the present invention are pyrophosphate and / or tripolyphosphate (STPP), more preferably sodium phosphate and / or sodium tripolyphosphate (STPP).

Phytic acid, which is especially suitable For use in the present invention, it is an acid hexa-phosphoric found naturally in the seeds of many cereal grains, usually in the form of the  insoluble calcium-magnesium salt. also can Obtained from corn liquor. Quality phytic acid Commercial is marketed by J. T. Baker Co., p. ex. like a 40% aqueous solution. It is intended that the present invention cover the acidic form of phytic acid as well as its derivatives in form of alkali metal salts, particularly sodium or potassium. Sodium phytate is marketed by Jonas Chemical Co (Brooklyn, N.Y). In fact, since the characteristic pH of the compositions of the present invention is in the alkaline range, the Phytic acid component is found in liquid compositions of the present invention primarily in the form of ionized salt, even when it is added in its acid form. Mixtures of said salts Phytic acid are also covered by the invention.

They can also be useful in the compositions of the present invention aromatic chelating agents polyfunctionally substituted. See the patent US 3,812,044, issued May 21, 1974 to Connor et al. Preferred compounds of this type in acid form they are dihydroxydisulfobenzenes, such as 1,2-dihydroxy-3,5-disulfobenzene.

A preferred biodegradable chelating agent for use in the present invention is acid ethylene diamino-N, N'-disuccinic,  or salts of alkali or alkaline earth metals, ammonium or substituted ammonium or mixtures thereof. Acids ethylene diamino-N, N'-disuccinics, especially isomers (S, S) have been described extensively in the US Patent 4,704,233, issued November 3, 1987 to Hartman and Perkins. Acids ethylenediamine-N, N'-disuccinics are marketed, for example, under the trade name ssEDDS®por Palmer Research Laboratories.

Especially preferred chelating agents of use in the present invention are chelating agents of type phosphate such as sodium pyrophosphate, sodium tripolyphosphate, acid Phytic and mixtures thereof.

Typically, the compositions of the The present invention comprises up to 10%, preferably 0.01% at 5%, more preferably from 0.05% to 2% and most preferably 0.1% to 1.5%, by weight of the composition of a chelating agent or a mixture thereof.

Optional pH buffer components

In the compositions of the present invention, the presence of a pH buffer component is not mandatory, But it is preferred.

It is believed that the presence of a component pH buffer in the compositions of the present invention It also contributes to the stability of these compositions, to the Effective whitening action as well as the safety of tissues. In fact, the pH buffer component allows you to control alkalinity in the bleaching solution, that is, maintaining the pH of the bleaching solution at a value of at least 7.5, preferably of at least 8, and more preferably of at least 8.5, for a longer period of time from moment when the dilution is completed (eg when the bleaching composition of the present invention is diluted in the bleaching solution at a dilution level of 500: 1 [water: composition]). It is believed that the pH buffer component it can also contribute to the stability of the ingredients unstable to the bleach of the present invention.

The pH buffer component ensures that the pH of the composition is buffered at a pH of 7.5 to 13, preferably from 8 to 12 and more preferably from 8.5 to 11.5, after having diluted the composition in 1 to 500 times its weight in Water.

The appropriate pH buffer components for use in the present invention are selected from the group that It consists of alkali metal salts such as carbonates, polycarbonates, sesquicarbonates, silicates, polysilicates, salts of boron, phosphates, stannates, aluminates and mixtures thereof. More preferably carbonate, silicate and metal borate salts alkaline. Preferred alkali metal salts for use in the Present invention are those of sodium and potassium.

PH buffer components particularly preferred are selected from the group consisting of sodium carbonate, sodium silicate, sodium borate, sodium metaborate and mixtures thereof.

The raw materials involved in the Preparation of hypohalite bleaches contain usually secondary products, e.g. e.g. calcium carbonate, that produce an amount of up to 0.4% by weight of by-product in The composition of hypohalite. However, in this amount the by-product will not present the defined buffering action previously.

The liquid bleaching compositions of the present invention may contain a quantity of component pH buffer 0.5% to 9% by weight, preferably 0.5% to 5% by weight, and more preferably 0.6% to 3% by weight, of the composition.

Optional surfactants

The liquid compositions of the present invention may comprise a surfactant as a very preferred optional ingredient . In fact, it has been surprisingly discovered that the presence of surfactants can contribute significantly to improving the overall stability of the liquid compositions according to the present invention. Without intending to impose any theory, it is speculated that the best overall stability is due to better hydrophobic interactions between reactive compounds such as bleach unstable brighteners or bleach unstable coloring agents, and the micellar medium created when the compositions of the present invention comprise a surfactant

Such surfactants may be present in the compositions of the present invention in amounts of 0.1% to 50%, preferably from 0.1% to 40% and more preferably from 1% to 30%, in composition weight.

The surfactants suitable for use in the Present invention include anionic surfactants, surfactants nonionic, cationic surfactants, amphoteric surfactants, hybrid ion surfactants and mixtures thereof.

In a particularly preferred embodiment the Surfactant is selected from the group consisting of alkyl sulfate, alkyl ether sulfate and mixtures thereof.

Anionic surfactants suitable for use in the compositions of the present invention include salts or water soluble acids of formula ROSO 3 M where R preferably it is a hydrocarbyl C 10 -C 24, preferably linear alkyl or branched that has an alkyl component C 10 -C 20, more preferably an alkyl C 12 -C 18 linear or branched, and M is H or a cation, p. e.g., an alkali metal cation (e.g., sodium, potassium, lithium) or ammonium or substituted ammonium (e.g., cations of methyl-, dimethyl- and trimethyl ammonium and quaternary ammonium cations such as tetramethyl ammonium and dimethyl cations piperidinium and quaternary ammonium cations derived from alkylamines such as ethylamine, diethylamine, triethylamine, and mixtures thereof, and the like).

Other suitable anionic surfactants for use in the present invention are water soluble salts or acids of formula RO (A) m SO 3 M where R is a group linear or branched C 6 -C 24 alkyl substituted which has an alkyl component C 6 -C 24, preferably an alkyl C 10 -C 20 linear or branched, plus preferably linear C 12 -C 18 alkyl or branched, A is an ethoxy or propoxy unit, m is greater than zero, typically between about 0.5 and about 30, plus preferably between about 0.5 and about 5, and M is H or a cation that can be, for example, a metal cation (e.g. e.g., sodium, potassium, lithium, calcium, magnesium, etc.) or a cation of ammonium or substituted ammonium. The present invention contemplates both ethoxylated alkyl sulfates and alkyl sulfates propoxylated Specific examples of substituted ammonium cations include methylammonium, dimethylammonium, trimethylammonium and cations quaternary ammonium cations, such as tetramethylammonium or dimethyl piperidinium, and cations derived from alkylamines, such as ethylamine, diethylamine or triethylamine, mixtures thereof and Similar. Illustrative surfactants are alkyl C 12 -C 18 polyethoxylated sulfate (1.0), C 12 -C 18 sulfate E (1.0), alkyl C 12 -C 18 polyethoxylated sulfate (2.25), C 12 -C 18 sulfate E (2.25), alkyl C 12 -C 18 polyethoxylated sulfate (3.0), C 12 -C 18 E (3.0) sulfate and alkyl C 12 -C 18 polyethoxylated sulfate (4.0), C 12 -C 18 sulfate E (4.0), wherein the Counterion is conveniently selected from sodium and potassium.

In an especially preferred embodiment of the present invention the surfactant system used is a system anionic surfactant, namely alkylalkoxy (preferably ethoxy) sulfate alone, for example alkyl (ethoxy) 3 sulfate, or together with a auxiliary surfactant, preferably an alkyl C 2 -C 10 sulfate and / or an alkyl or aryl C 8 -C 22 sulfonate as benzene C 8 -C 22 sulfonate and / or other alkylalkoxysulfate other than ethoxylated. In fact the presence of said alkyl (ethoxy) 3 sulfate alone or together with a surfactant auxiliary provides the desired viscosity to those present compositions and provides excellent removal properties stains to said compositions, especially when used in any laundry application. In a very realization preferred, said alkyl (ethoxy) 3 sulfate is alcohol sulfate triethoxylated lauryl.

Typically the compositions according to the The present invention has a viscosity between 0.025 Pa.s (25 cps) and 1.5 Pa.s (1500 cps), preferably between 0.05 Pa.s (50 cps) and 1.1 Pa.s (1100 cps), depending on the relationship AE_ {S}: auxiliary surfactant, measured with a rheometer such as Carri-med CSL2-100® with the following viscosity parameters: angle: 1º58, distance: 60, diameter: 4.0 cm, iner .: 63.60 at a temperature of 25 ° C and a shear rate of 30 1 / sec.

They can also be used here. invention other anionic surfactants useful for purposes detersives

Especially suitable nonionic surfactants of use in the present invention are non-ethoxylated surfactants not Terminal protected ionics according to the formula:

R 1 (OR 2) n OR 3

where R_ {1} is a group C 8 -C 18 linear alkyl or alkenyl or branched, aryl group, alkylaryl group, preferably, R1 is an alkyl or alkenyl group C 10 -C 15, more preferably a group C 10 -C 15 alkyl; R2 is a group linear or branched C2-C10 alkyl, preferably a C4 group; R 3 is an alkyl group or C 1 -C 10 alkenyl, preferably a group C 1 -C 5 alkyl, and n is an integer in the range of 1 to 20, preferably 1 to 10, more preferably from 1 to 5; or mixtures thereof. These Surfactants are marketed by BASF under the name Plurafac®, by HOECHST with the name Genapol® or by ICI with the name Symperonic® Non-ionic ethoxylated surfactants terminally Preferred protected of the above formula are those marketed under the trade names Genapol® L 2.5 NR by Hoechst and Symperonic® LF / CS 1100 by ICI

Other suitable non-ionic surfactants for use in the present invention include a class of compounds that they can be broadly defined as compounds produced by the condensation of alkylene oxide groups (hydrophilic type) with a hydrophobic organic compound, which can be aliphatic branched or linear (eg Guerbet or secondary alcohol) or type aromatic alkyl. The length of the hydrophilic radical or polyoxyalkylene that condenses with any hydrophobic group It can be easily adjusted to obtain a water-soluble compound  having the desired balance between hydrophilic elements and hydrophobic elements

Hybrid ion detergents suitable for use in the present invention comprise the detergents of betaine and betaine type where the molecule contains basic and acidic groups that form an internal salt that brings groups to the molecule both cationic and anionic hydrophiles in a wide range of pH values Some common examples of these detergents are described in patents US-2,082,275, US-2,702,279 and US-2,255,082.

Amphoteric and ampholytic detergents, which they can be cationic or anionic depending on the pH of the system, are represented by detergents such as dodecilbeta-alanine, N-alkyltaurines, such as prepared by the reaction of dodecylamine with sodium isethionate according to the Description of the patent US-2,658,072, acids N-alkyl aspartic superiors, such as produced according to the patent description US 2,438,091 and the products sold with the name "Miranol" and described in the patent US 2,528,378. Additional synthetic detergents and listings of your commercial sources can be found in the work of McCutcheon Detergents and Emulsifiers, ed. American 1980.

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Other optional ingredients

The bleaching compositions herein invention may also comprise different ingredients optional such as bleach activators, suspensions dirt, polyamine-type dirt-suspending polymers, polymeric soil release agents, systems / agents foam reducers, catalysts, transfer agents dyes, perfumes, hydrotropes and solvents.

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Method to reduce or prevent the breakdown of a unstable brightener brightener and / or unstable dye to the bleach in a bleaching composition comprising a hypohalite bleach.

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Also the present invention also encompasses a method to reduce or prevent the decomposition of a compound selected from the group consisting of unstable brighteners bleach, bleach unstable coloring agents and mixtures thereof, in a bleaching composition comprising a hypohalite bleach, where the method comprises incorporate into the bleaching composition an inhibited cyclic amine and wherein said hypohalite bleach is a hypochlorite of alkali metal and / or alkaline earth metal.

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Use of an impaired cyclic amine to reduce or avoid the decomposition of an unstable brightener to the bleach and / or a bleach unstable dye in a bleach composition comprising a hypohalite bleach where said hypohalite bleach is an alkali metal hypochlorite and / or alkaline earth metal.

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In another aspect, the present invention is refers to the use, in a bleaching composition comprising a hypohalite bleach, of a cyclic amine prevented from reduce or prevent the decomposition of a compound selected from group consisting of bleach unstable brighteners, bleaching unstable coloring agents and mixtures of themselves, in the bleaching composition, wherein said bleach hypohalite type is an alkali metal and / or metal hypochlorite alkaline earth.

Process to treat tissues

In the present invention, the composition of bleaching of the present invention is used by applying the liquid bleaching composition to the tissue to be treated. The Liquid compositions of the present invention are applied on the own tissue in pure or diluted form.

The compositions of the present invention are typically used in diluted form in an operation of laundry By "diluted form" is understood in the present report that tissue bleaching compositions according to the present invention can be diluted by the user, preferably with water. Said dilution can be made, by example, in laundry applications by hand or by others procedures such as p. eg, in a clothes washer. These compositions can be used at a dilution level of up to 1500: 1 (solvent: composition), preferably from 5: 1 to 1000: 1 (solvent: composition) and more preferably from 10: 1 to 700: 1 (solvent: composition).

The expression "in pure form" means that liquid bleaching compositions are applied directly on the tissues to be treated without previously subjecting them to no dilution, that is, the liquid compositions of the The present invention is applied to tissues as described in This memory.

The tissues to be treated according to the present invention include, but not limited to, garments of dressing, curtains, curtains, bedding, towels, tablecloths, sleeping bags and / or tents. By "try a tissue ", it is understood herein to clean said tissue and / or bleach / disinfect said tissue.

In the process of treating (e.g., cleaning and / or bleach) a fabric, a bleaching composition of the present invention comes into contact with the tissue that must be treaty.

This can be done in the so-called "mode pretreatment ", where a liquid bleaching composition, according to  defined herein, applied purely on said tissue before rinsing the tissue, or washing and then rinsing the tissue, or in the so-called "soaking mode" where a composition of liquid or solid bleaching, as defined herein, first it is diluted in an aqueous bath and then the tissue is submerged and soaked in the bath and then rinsed, or in the called "mode of addition during washing", where a liquid or solid bleaching composition, as defined in the This report is also added to a washing solution formed by dissolution or dispersion of a laundry detergent typical, preferably in a clothes washer. It is also fundamental in both cases clarify the tissues after having been in contact with said composition and before said composition has dried completely.

More specifically, the bleaching process of fabrics according to the present invention preferably comprises the stages of firstly contacting said tissue with a bleaching composition according to the present invention, leaving said tissue in contact with said composition for a period of long enough to bleach said tissue and finally rinse said tissue with water. If it is desired to wash said fabric, e.g. eg, with a conventional composition comprising at least one surfactant, washing said tissue with a composition detergent comprising at least one surfactant can be performed before the step of contacting said tissue with said bleaching composition and / or at the stage where said tissues are contacted with said bleaching composition and / or after the stage where said tissues come into contact with the bleaching composition and before the rinsing stage and / or after the rinse stage.

The bleaching composition can be used in diluted form or pure form. If used in diluted form, the bleaching composition should remain in contact with the tissue of typically 1 to 60 minutes, preferably 5 to 30 minutes. On the contrary, if the bleaching composition is used in its pure form, must remain in contact with the tissue during a much shorter time, typically 5 seconds to 30 minutes, preferably from 1 minute to 10 minutes.

In the present invention it is preferred to perform the bleaching process before washing said fabrics. In fact, it has observed that by bleaching said tissues with the compositions of the present invention (diluted and / or pure bleaching processes) before to wash them with a detergent composition you get more whiteness and stain removal with less energy and detergent than when said tissues are washed first and then bleached.

Alternatively, instead of performing the pure bleaching process as described above (pretreatment application) in a rinsing stage and / or a conventional washing stage with a liquid or powder detergent Conventional, bleaching pretreatment operation also It can be followed by a bleaching process in diluted form as described above either in a village (manual operation) or in a washing machine

Process to treat hard surfaces

In another embodiment, the present invention covers a process to treat a hard surface with a composition, as defined herein, preferably where said process comprises the step of applying  said composition to said hard surface, more preferably only to stained parts thereof, and optionally clarify said hard surface.

In the process to treat hard surfaces according to the present invention the composition, as defined in the This memory can be applied to the desired surface treat in pure form or diluted form. When applied in form diluted, the composition is preferably diluted up to 200 times its water weight, preferably 80 to 2 times its water weight and more preferably 60 to 2 times its water weight.

Depending on the intended end use, the Compositions of the present invention can be packed in different containers including conventional jars, jars equipped with ball, sponges, brushes, sprayers, bags, sachets, boxes, etc.

Examples

The following examples illustrate further the present invention. The compositions of the examples They are intended to illustrate compositions according to the present invention although not necessarily intended to limit or otherwise define the scope of the present invention.

3

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5

All examples have a pH of 11, adjusted with NaOH

Tempoxy LO® is marketed by 3V Sigma.

Tinogard® SF-X is marketed by Ciba Specialty Chemicals.

Tinopal CBS-X®, Tinopal AMS-GX® and Tinopal 5BM-GX® are marketed by Ciba Specialty Chemicals.

Pigmosol Blue 6900® is marketed by BASF

Iragon Blue DBL86® and Hostafine Blue B2G® are marketed by Clariant.

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Comparative data

The following examples illustrate further the present invention. The compositions are prepared combining the ingredients mentioned in the proportions indicated (% by weight unless otherwise indicated). The Illustrative compositions VI, B and D are intended to illustrate compositions according to the present invention although not used necessarily to limit or otherwise define the scope of the present invention Illustrative compositions V, VII, VIII, A and C are comparative examples.

6

All examples have a pH greater than 11, adjusted with NaOH.

AvCl_ {2}: Chlorine available_ {;} compositions contain sodium hypochlorite TMBA is the acid 3,4,5, benzoic trimethoxy marketed by Hunan Shineway

3,5-DMBA is the acid 3,5, benzoic dimethoxy marketed by Aldrich.

CuPht is copper phthalocyanine blue marketed by BASF as Pigmosol Blue 6900®.

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Effect on brightener stability

Compositions V to VIII were aged in a RAT as described herein (10 days a 50 ° C). Loss of activity due to bleach Tinopal CBS-X® brightener was rated as described herein by measuring the residual content of brightener in the corresponding bleaching compositions "aged" (in ppm) by HPLC analysis. The results They are presented in the following table.

The previous results clearly demonstrate the best brightener stability obtained with a composition bleach containing hypohalite according to the present invention (composition VI), that is the composition comprising an amine cyclical prevented, with respect to comparative compositions that comprise known common stabilizers (compositions VII and VIII).

7

Effect on dye stability

A comparative study of the dye stability by aging compositions A, B, C and D in a RAT, as described herein (10 days a 50 ° C). Loss of dye activity caused by the bleach was judged by visual scoring, as has described herein above. In fact, the loss of activity of the dye produced by the bleach in the "aged" composition was compared with the activity of dye in a "fresh" composition comprising 0% of active halide by weight of the composition and 0.002% by weight thereof Colorant. The PSU activity scale of the dye comprised 0, which meant no noticeable difference in color between the "aged" composition and "fresh" composition, at 5, which meant a clearly discernible difference in color between the "aged" composition and the composition "fresh."

8

The previous results clearly show the better stabilization of the dye obtained with a composition of bleaching containing hypohalite that incorporates a cyclic amine prevented (compositions B and D) against the compositions comparatives that do not include stabilizer (composition A) and that comprise a known common stabilizer (TMBA in the composition C), respectively. The TMBA stabilizer is considered until moment as the best stabilizer in its class for compositions bleaching containing hypohalite and also comprising a bleach unstable brightener and / or an unstable dye bleach.

Claims (19)

1. A liquid bleaching composition that comprises a hypohalite bleach, a cyclic amine prevented and a compound selected from the group consisting of bleach unstable brighteners, coloring agents unstable to bleach and mixtures thereof, where said hypohalite bleach is an alkali metal hypochlorite and / or alkaline earth metal. 2. A liquid bleaching composition according to the claim 1, wherein said hindered cyclic amine is Select from compounds that have the general formula: 9 where X_ {1}, X_ {2}, X_ {3} and X4, separated or together, represent methyl or ethyl; R_ {1} it is H, methyl, ethyl, oxyl, hydroxyl or alkoxy; and R2 is H, hydroxyl, alkoxy or oxycarbonyl 3. A liquid bleaching composition according to the claims 1-2, wherein said cyclic amine disabled is selected from the group consisting of 4-hydroxy-2,2,6,6-tetramethylpiperidine; 1-hydroxy-2,2,6,6-tetramethyl-4-hydroxypiperidine; 1-oxyl-2,2,6,6, -tetramethylpiperidine; 1-oxyl-2,2,6,6-tetramethyl-4-hydroxypiperidine. 4. A liquid bleaching composition according to the claims 1-3, wherein said cyclic amine disabled is 1-oxyl-2,2,6,6, -tetramethyl-4-hydroxypiperidine. 5. A liquid bleaching composition according to the claims 1-3, wherein said cyclic amine disabled is 1-hydroxy-2,2,6,6, -tetramethyl-4-hydroxypiperidine. 6. A liquid bleaching composition according to any of the preceding claims, wherein said composition comprises from 0.001% to 5%, preferably from 0.005% to 2.5%, more preferably from 0.01% to 1.0% and most preferably from 0.02% to 0.05%, by weight of the total composition of said amine Cyclic prevented. 7. A liquid bleaching composition according to any of the preceding claims, wherein said hypohalite bleach, based on active halide, is present in an amount of 0.01% to 20% by weight of the composition. 8. A liquid bleaching composition according to any of the preceding claims, wherein the bleach unstable brightener is selected from the group that consists in: 4,4'-bis- (2-sulfoestiryl) -biphenyl disodium 4,4'-bis - [(4,6-di-anilino-s-triacin-2-yl) -amino] -2,2'-stilbenedisulfonate disodium 4,4'-bis - [(4-anilino-6-morpholin-s-triacin-2-yl) -amino] -2,2'-stilbenedisulfonate;  Y 4,4'-bis [(4-anilino-6-bis-2 (2-hydroxyethyl) -amino-s-triacin-2-yl) -amino] -2,2'-stilbenedisulfonate; and mixtures thereof. 9. A liquid bleaching composition according to any of the preceding claims, wherein the bleach unstable brightener of the present invention is 4,4'-bis- (2-sulfoestiryl) -biphenyl disodium 10. A liquid bleaching composition according to any of the preceding claims, wherein said Composition comprises from 0.001% to 1.0% by weight of the composition total of said brightener unstable to the bleach. 11. A liquid bleaching composition according to any of the preceding claims, wherein the dye  unstable to bleach is selected from the group consisting of: copper phthalocyanine blue; Direct Blue 86; Pigment Blue 15: 1; Y Pigment Blue 15: 3; and mixtures thereof. 12. A liquid bleaching composition according to any of the preceding claims, wherein the dye  Unstable to the bleach is copper phthalocyanine blue. 13. A liquid bleaching composition according to any of the preceding claims, wherein said Composition comprises from 0.001% to 1.0% by weight of the composition total of said dye unstable to bleach. 14. A method to reduce or avoid decomposition of a compound selected from the group consisting in bleach unstable brighteners, coloring agents unstable to bleach and mixtures thereof, in a bleaching composition comprising a bleach of type hypohalite, said method comprising incorporating said bleaching composition a cyclic amine hindered according to any of the preceding claims, wherein said bleach of hypohalite type is an alkali metal and / or metal hypochlorite alkaline earth. 15. A process to treat a tissue that comprises the step of applying a liquid bleaching composition according to any of claims 1-13 on said tissue that must be treated. 16. The use, in a bleaching composition that comprises a hypohalite bleach, of a cyclic amine prevented to reduce or prevent the decomposition of a compound selected from the group consisting of unstable brighteners to bleach, bleaching agents unstable to bleach and mixtures thereof, in said bleaching composition, wherein said hypohalite bleach is a metal hypochlorite alkaline and / or alkaline earth metal. 17. The use according to claim 16, for reduce or prevent the decomposition of unstable brighteners by bleach. 18. The use according to the claims 16-17, wherein said hindered cyclic amine is 1-oxyl-2,2,6,6, -tetramethyl-4-hydroxypiperidine. 19. The use according to the claims 16-17, wherein said hindered cyclic amine is 1-hydroxy-2,2,6,6, -tetramethyl-4-hydroxypiperidine.