ES2232928T3 - WHITE, COLORED, STABLE WHITENING COMPOSITIONS. - Google Patents

Abstract

THIS INVENTION REFERS TO COMPOSITIONS CONTAINING WHITENING AGENT BASED ON HYPOHALITE, THICK, COLORED AND LIQUID AND THAT HAVE A VISCOSITY OF 10 CPS AT 2000 CPS. THESE COMPOSITIONS CONTAIN A HIPOHALITE BLEACHER, A RENT SULPHATE (ALCOXI) N), WHERE N IS FROM 2 TO 4, OPTIONALLY A TENSIOACTIVE COADYUVANT AND A PIGMENT SELECTED FROM THE GROUP FORMED BY ITS SUSTAINED BLUE AND SUSTAINABLE EQUIPMENT EQUIVALENTS, ALUMINUM COBALT BLUE AND MIXTURES OF THE SAME.

Description

Thickened, colored bleaching compositions, stable.

Field of the Invention

The present invention relates to compositions colored thickened liquid bleaches, particularly at colored thickened liquid bleaching compositions of type hypochlorite that can be used to bleach different surfaces, including, but not limited to, rigid surfaces such as walls, tiles, floors, glass, room surfaces bathroom, kitchen surfaces, toilet bowls, dishes, as well as fabrics, clothes, carpets and the like.

Background of the invention

Thickened bleaching compositions are fine. known in the art. Among the different compositions available thickened bleaches are often preferred hypohalite bleaches such as hypochlorite, mainly For performance reasons.

Preferably, the viscosity will be increased by means of a so-called "surfactant or surfactant system self-thickener ", instead of using a thickener for this specific purpose Indeed, thickeners such as gums or the polymers have at least one drawback and it is that of increase the cost of the formulation without providing another benefit that Don't be the thickening action. These products do not participate in the proper cleaning of the surface and therefore are considered as "inert" materials.

Therefore, it is desirable to formulate thickened liquid bleaching compositions based on bleach hypohalite type, especially bleaching compositions thickened colored liquids, with the help of a surfactant gelling agent that, in addition to having gelling properties, also It has a good cleaning capacity, that is, a good ability to remove stains of various types, including grease spots and / or enzymatic spots and the like

In addition, there is a need to have colored thickened liquid bleaching compositions based on hypohalite bleach and a gelling surfactant that have chemical and physical stability during aging of the compositions, that is, during storage periods prolonged after manufacture. Indeed, it is desirable. provide thickened liquid bleaching compositions colored containing hypohalite bleach that have color stability during storage periods prolonged, that is, they retain a homogeneous color during prolonged storage periods.

Therefore, an object of the invention is provide a colored thickened liquid bleaching composition which contains hypohalite bleach that comprises a gelling surfactant, said composition having a physical and chemical stability during aging and providing excellent stain removal capacity of various types.

The applicant has now discovered, surprisingly, that this problem is solved by formulating a thickened liquid bleaching composition having a viscosity of 10 cps at 2000 cps, measured with a carri-med rheometer CSL2-100® at the following viscosity parameters: angle 1º58 ', separation 60 µm, diameter 4.0 cm, force of shear 63.60 dynes * cm * s2, temperature 25ºC and speed of friction 30 sec -1, said composition comprising a hypohalite bleach, an alkyl (alkoxy) 2-4 sulfate, optionally a auxiliary surfactant and a pigment selected from the group that consists of ultramarine blue (Na7 {Al} {6} Si_ {6} O_ {24} S2 {) and its equivalents, chlorinated stents and their equivalents, blue of cobalt aluminate and mixtures thereof. Indeed, it has noted that the addition of such a pigment to a self-thickened liquid bleaching composition containing hypohalite bleach according to the present invention, which comprises a hypohalite bleach, an alkyl (alkoxy) 2-4 sulfate and a surfactant optional auxiliary, does not impair the chemical and physical stability of the composition during aging, that is, during periods Prolonged storage after manufacturing. In others words, the present invention provides compositions colored thickened liquid bleaches containing bleach hypohalite type with improved rheological properties capable of stably suspend the pigments.

In a preferred embodiment the compositions of The present invention also comprises a stabilizing agent, preferably a radical scavenger, a chelating agent or a mixture thereof. Indeed, it has been found that the addition of such a stabilizing agent, preferably a remover of radicals alone or accompanied by a chelating agent, to a colored thickened liquid bleaching composition containing hypohalite bleach, an alkyl (alkoxy) 2-4 sulfate, a surfactant Optional auxiliary and pigment, improves the rheological stability of said composition during aging, that is, in periods prolonged storage after manufacturing, in comparison with the rheological stability of the same composition without said stabilizing agent during the aging of the composition. In other words, the addition of said agent stabilizer reduces, or even prevents, the decrease in viscosity of the compositions for prolonged periods of storage, which could otherwise occur in the absence of said stabilizing agent. Indeed, in the absence of said agent stabilizer the gelling surfactant can be decomposed by the hypohalite bleacher present and lose, thus, Its gelling power. Also, the presence of an agent stabilizer of this type in bleaching compositions preferred colored thickeners of the present invention also brings benefits to the compositions of the present invention, it is say, it provides chemically and physically colored compositions stable that retain their color during storage periods prolonged

Another advantage of the compositions herein invention lies in its good bleaching capacity, with a whiteness especially effective when used in any application of laundry, as well as its good ability to remove various types of stain, including greasy spots such as carmine, makeup, tallow, oils (mineral and vegetable), mayonnaise, egg and the like and / or enzymatic stains like grass, cocoa, blood and the like, even during the aging of the composition. In a preferred embodiment, in which the colored thickened liquid compositions of the present invention they also comprise a stabilizing agent, the presence of said stabilizing agent contributes to provide a good capacity bleaching and / or a good ability to eliminate various types of spots during the aging of the compositions.

Advantageously, the compositions of the invention are suitable for the bleaching of different types of surfaces, including rigid surfaces such as floors, walls, tiles, glass, kitchen surfaces, room surfaces bath, toilet bowls and / or plates and the like, as well as fabrics. Plus particularly, the compositions of the present invention are suitable for bleaching any type of fabric, including natural fabrics (e.g., cotton, viscose, linen, silk and wool), synthetic fabrics such as those made of fibers Polymers of synthetic origin, as well as fabrics made with Both types of fiber, natural and synthetic. Indeed, the Compositions of the present invention can be used on synthetic fibers, despite the prevailing prejudice against use of hypohalite bleaches, especially of hypochlorite bleaches, on synthetic fibers, as warns on the labels of hypochlorite bleaches and of existing commercial textile items. So advantageously, the compositions of the present invention not only they are safe for the tissues bleached with them, but also for the dyes thereof.

An additional advantage of the compositions Liquid bleaches of the present invention are that they are suitable for various laundry bleaching applications, whether they are used in diluted form, e.g. e.g., as a detergent additive or in a complete formulation of a laundry detergent, such as if used in pure form, p. e.g., as a liquid pretreatment (spotter)

Summary of the invention

The present invention is a composition colored thickened liquid bleacher having a viscosity of 10 cps at 2000 cps, measured with a Carri-med rheometer CSL2-100®, to viscosity parameters following: angle 1º58 ', separation 60 µm, diameter 4.0 cm, shear force 63.60 dynes * cm * s 2, temperature 25 ° C and friction speed 30 s -1 and comprising

-

a hypohalite bleach,

-

a alkyl (alkoxy) n sulfate, where n is from 2 to 4

-

a optional auxiliary surfactant,

-

and a pigment selected from the group consisting of ultramarine blue (Na_ {Al} {6} Si_ {6} O_ {24} S2} and its equivalents, chlorinated stents and their equivalents, cobalt aluminate blue and mixtures thereof.

-

and a stabilizing agent selected from radical scavengers and mixtures thereof.

However, the present invention is also refers to a process for bleaching surfaces (including fabrics, rigid surfaces and / or plates), where said surfaces are brought into contact with a bleaching composition colored liquid according to the present invention in its pure form or diluted

Detailed description of the invention Liquid bleaching compositions

The compositions according to the present invention are found in liquid form. Preferably, the compositions of The invention is in aqueous liquid form. Plus preferably, the compositions comprise water in an amount from 60% to 98% by weight, more preferably from 80% to 97% and with maximum preference of 85% to 97% by weight of the bleaching composition Total aqueous liquid.

The compositions according to the present invention are thickened compositions, that is, with a viscosity of 10 cps at 2000 cps measured with a Carri-med rheometer CSL2-100® at the following viscosity parameters: angle 1º58 ', separation 60 µm, diameter 4.0 cm, force of shear 63.60 dynes * cm * s2, temperature 25ºC and speed of friction 30 s -1, preferably from 25 cps to 1500 cps, and more preferably from 50 cps to 1200 cps.

Hypohalite bleaches

An essential component of the invention is a hypohalite bleaching. Hypohalite bleaches they can come from several sources, including the bleaches that they are oxidizing and, consequently, lead to ion formation positive halides, as well as bleaches that are organic sources of halides such as chloroisocyanurates.

Suitable hypohalite bleaches for use in the present invention include hypochlorites, hypobromites and hypoiodites of alkali metals and metals alkaline earth metals, chlorinated trisodium phosphate dodecahydrates, potassium and sodium dichloroisocyanurates, potassium and sodium trichlorocyanurates, the N-chloroimides, N-chloroamides, N-chloroamines and chlorohydantoins.

For the liquid compositions herein invention, the preferred hypohalite bleaches of between those described above are alkali metal hypochlorites and / or alkaline earth metals selected from the group consisting of sodium, potassium, magnesium, lithium and calcium hypochlorites and mixtures thereof, more preferably the alkali metal hypochlorite sodium.

Preferably the liquid compositions according to the present invention comprise said type bleach hypohalite or a mixture thereof so that the content of active halide in the composition is 0.1% to 20% by weight, plus preferably from 0.25% to 8% by weight and most preferably 0.5% to 6% by weight of the composition.

The alkyl (alkoxy) 2-4 sulfates

An essential component of the invention is a alkyl (alkoxy) n sulfate, in which n is from 2 to 4, or a mixture thereof.

Alkyl surfactants (alkoxy) 2-4 sulfate suitable for Use in the present invention are salts or water-soluble acids of formula:

RO (A) n SO 3 M,

in where

-

R is a linear or branched C 4 -C 24 alkyl, substituted or unsubstituted, preferably an alkyl C 8 -C 20 linear or branched, plus preferably a linear C 8 -C 18 alkyl or branched and most preferably an alkyl C 10 -C 16 linear or branched,

-

A is an ethoxy or propoxy group,

-

n is from 2 to 4, preferably 2 or 3 and more preferably 3,

-

and M is H or a cation, which can be a metal cation (e.g., sodium, potassium, lithium, calcium, magnesium, etc.), an ammonium cation or a substituted ammonium cation.

In the present invention alkyl are preferred (ethoxy) 2 sulfates and alkyl (ethoxy) 3 sulfates. Examples specific ammonium substituted cations include cations methylammonium, dimethylammonium, trimethylammonium and ammonium cations quaternary such as tetramethylammonium, dimethyl piperidinium and cations derived from alkanolamines such as ethylamine, diethylamine, triethylamine, mixtures thereof and the like.

The C12 / C14 E3 sodium sulfate can be, for example, the marketed by Albright & Wilson under the name EMPICOL ESC3®. The C12 / C14 E2 sodium sulfate can be, for example, the marketed by Rhone Poulenc under the name Rhodapex ES-2®.

Preferably, the liquid compositions according to the present invention comprise said alkyl (alkoxy) 2-4 sulfates in an amount of 0.1% to 20% by weight, more preferably 0.5% to 15%, even more preferably from 2% to 10% by weight and most preferably from 3% to 8% by weight of the composition.

The presence of one of these alkyls (alkoxy) 2-4 sulfates, preferably a alkyl (ethoxy) 2-4 sulfate, provides viscosity to the liquid bleaching compositions herein invention and helps to achieve a stable suspension of the pigment. Indeed, the presence of an alkyl (alkoxy) 2-4 sulfate in the compositions Colored liquid bleaches of the present invention reduce or even prevents sedimentation of the pigment, that is, the phenomenon of sedimentation and therefore allows the formulation of thickened colored thickened compositions be physically stable for prolonged periods of storage after the making.

In other words, the present compositions offer improved viscosity to compositions containing hypohalite bleaches, simultaneously providing commercially acceptable pigmented compositions with a excellent color stability

The expression "physically stable" means in the present specification that pigment sedimentation is not observed after 1 month of storage at 25 ° C.

Advantageously, liquid compositions colored thickeners containing hypohalite according to the present Invention they have the advantage of being chemically stable. By "chemically stable" it is understood that the compositions bleaching agents containing hypohalite of the present invention not lose more than 25% available chlorine after 5 days of storage at 50 ° C ± 0.5 ° C, preferably not more than 20%. The loss in% of available chlorine can be measured by the method described, p. eg, 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). Said method it consists of measuring the available chlorine in the compositions just prepared and then in those same compositions after 5 days storage at 50 ° C.

It has also been found that the presence of a alkyl (alkoxy) 2-4 sulfate of this type, preferably an alkyl (ethoxy) 2-4 sulfate, allows to provide excellent elimination capacity of spots of various types, including greasy spots and / or Enzymatic stains What's more, in a laundry application the presence of an alkyl (alkoxy) 2-4 sulfate of this type, and especially an alkyl (ethoxy) 2-4 sulfate, in the compositions bleaches of the present invention will improve the whiteness of the tissues treated with said bleaching compositions.

In other words, the presence of a single material, that is, an alkyl (alkoxy) 2-4 sulfate, provides the same time the viscosity characteristics of the compositions of the present invention and color stability to the compositions for extended periods of storage, providing the at the same time excellent ability to remove stains and / or bleaching capacity of a tissue treated with the compositions of the present invention comprising said material. So, another advantage of the present invention is that the compositions of the The present invention can be formulated at a reduced cost.

Optional auxiliary surfactants

The liquid compositions of the present invention may also comprise an auxiliary surfactant or a mixture thereof as an optional desirable ingredient to regulate the viscosity of the compositions of the present invention. Plus particularly, the auxiliary surfactants used herein invention have the necessary properties to modify the initial viscosity contributed by the presence of the alkyl (alkoxy) 2-4 sulfate in the compositions of the present invention, that is, to reduce or increase the viscosity provided by the presence of the alkyl alone (alkoxy) 2-4 sulfate as a surfactant gelling agent, in the compositions of the present invention. In others words, such an auxiliary surfactant will be selected depending on the desired initial viscosity for the compositions of the present invention.

Typically, the compositions according to the present invention comprise said auxiliary surfactant in amounts of 0.01% to 10% by weight of the total composition, preferably from 0.1% to 5% and more preferably from 0.1% to 2.5%

The auxiliary surfactants suitable for use in the present invention are typically selected from the group consisting of alkylsulfates, alkylarylsulfonates, alkylalkoxysulfates with 1 or more than 4 alkoxylated groups, hybrid ion surfactants such as betaine type surfactants, cationic surfactants such as alkyl halides trimethylammonium and mixtures thereof.

Alkylsulfates suitable for use in Compositions of the present invention include salts or acids water-soluble formula ROSO 3 M where R is preferably a C 4 -C 24 hydrocarbyl, preferably a linear or branched alkyl with an alkyl component C 6 -C 20, more preferably an alkyl C 6 -C 18 linear or branched and most preferably a linear or branched C 6 -C 16 alkyl and M is H or a cation, p. e.g., an alkali metal cation (e.g., sodium, potassium, lithium), or substituted ammonium or ammonium (e.g., cations methylammonium, dimethylammonium and trimethylammonium and ammonium cations quaternary such as tetramethylammonium and dimethylpiperidinium cations and quaternary ammonium cations derived from alkylamines as ethylamine, diethylamine, triethylamine and mixtures thereof, and Similar).

\hbox{RO(A) _{m} }

SO_{3}M en donde R es un grupo alquilo C_{4}-C_{24} lineal o ramificado, sustituido o no sustituido con un componente alquilo C_{4}-C_{24}, preferiblemente un alquilo C_{8}-C_{20} lineal o ramificado, más preferiblemente un alquilo C_{10}-C_{18} lineal o ramificado y con máxima preferencia un alquilo C_{10}-C_{16} lineal o ramificado, A es un grupo etoxi o propoxi, m es 1 o más de 4, de forma típica entre aproximadamente 5 y aproximadamente 30, más preferiblemente de aproximadamente 5 a aproximadamente 15, y M es H o un catión que puede ser, p. ej., un catión de metal (p. ej., sodio, potasio, litio, calcio, magnesio, etc.), un catión amonio o un catión amonio sustituido. En la presente memoria se contemplan tanto alquilsulfatos etoxilados como alquilsulfatos propoxilados. Ejemplos específicos de cationes amonio sustituidos incluyen los cationes metilamonio, dimetilamonio, trimetilamonio y cationes de amonio cuaternario como el tetrametilamonio, dimetilpiperidinio y cationes derivados de alquilaminas como la etilamina, dietilamina, trietilamina, mezclas de los mismos y similares. Tensioactivos ilustrativos son el alquil C_{12}-C_{18} polietoxilato(8) sulfato, el C_{12}-C_{18}E(6) sulfato, en el que el contraión se selecciona convenientemente de entre sodio y potasio.Other alkyl alkoxy sulfates of use in the present invention are salts or water-soluble acids of formula

 \ hbox {RO (A) m 

SO 3 M wherein R is a linear or branched C 4 -C 24 alkyl group, substituted or unsubstituted with a C 4 -C 24 alkyl component, preferably a C 8 alkyl -C 20 linear or branched, more preferably a linear or branched C 10 -C 18 alkyl and most preferably a linear or branched C 10 -C 16 alkyl, A is an ethoxy group or propoxy, m is 1 or more than 4, typically between about 5 and about 30, more preferably about 5 to about 15, and M is H or a cation that can be, e.g. eg, a metal cation (eg, sodium, potassium, lithium, calcium, magnesium, etc.), an ammonium cation or a substituted ammonium cation. Both ethoxylated alkyl sulfates and propoxylated alkyl sulfates are contemplated herein. Specific examples of substituted ammonium cations include methylammonium, dimethylammonium, trimethylammonium and quaternary ammonium cations such as tetramethylammonium, dimethylpiperidinium and alkylamine derived cations such as ethylamine, diethylamine, triethylamine, mixtures thereof and the like. Illustrative surfactants are C 12 -C 18 alkyl polyethoxylate (8) sulfate, C 12 -C 18 E (6) sulfate, in which the counterion is conveniently selected from sodium and potassium.

Alkylarylsulfonates suitable for use in present invention include salts or water-soluble acids of formula RSO 3 M where R is an aryl, preferably a benzyl, substituted by a C 4 -C 20 alkyl group linear or branched, saturated or unsaturated, preferably a group C 12 -C 18 alkyl and more preferably a C 14 -C 16 alkyl group, and M is H or a cation, p. e.g., an alkali metal cation (e.g., sodium, potassium, lithium, calcium, magnesium, etc.), or substituted ammonium or ammonium (e.g. eg, methylammonium, dimethylammonium and trimethylammonium cations and cations of quaternary ammonium such as tetramethylammonium and cations dimethylpiperidinium and quaternary ammonium cations derived from alkylamines such as ethylamine, diethylamine, triethylamine, and mixtures of the same and similar).

Betaine type hybrid ion surfactants suitable for use in the present invention contain a group hydrophilic cationic, that is, a quaternary ammonium group, and a hydrophilic anionic group in the same molecule in a pH range relatively broad. Typical anionic hydrophilic groups are carboxylates and sulphonates, although others may be used groups such as sulfates, phosphonates and the like. A formula generic for betaine type hybrid ion surfactants of Use in the present invention is as follows:

R 1 -N + (R 2) (R 3) R 4 X -

where R_ {1} is a group hydrophobe; R2 is hydrogen, alkyl C 1 -C 6, hydroxy alkyl or other group C 1 -C 6 substituted alkyl; R_ {3} is a C1-C6 alkyl, hydroxyalkyl or other group C 1 -C 6 substituted alkyl group that can also join R2 to form ring debris with the N, or a C 1 -C 6 carboxylic acid group or a group C 1 -C 6 sulfonate; R_ {4} is a remainder that binds the cationic nitrogen atom with the hydrophilic group, and is of typically an alkylene, hydroxyalkylene, or polyalkoxy group that contains from 1 to 10 carbon atoms; and X is the hydrophilic group, which is a carboxylate group or sulphonate

Preferred hydrophobic groups R1 are chains of aliphatic or aromatic hydrocarbons, saturated or unsaturated, substituted or unsubstituted, which may contain linking groups such as amido groups and ester groups. He Most preferred R1 is an alkyl group containing from 1 to 24 carbon atoms, preferably from 8 to 18 and more preferably from 10 to 16. These simple alkyl groups are preferred for reasons of cost and stability However, the hydrophobic group R1 also it can be an amido radical of formula R a -C (O) -NH- (C (R b) 2) m, where R_ {a} is an aliphatic or aromatic hydrocarbon chain, saturated or unsaturated, substituted or unsubstituted, preferably an alkyl group containing from 8 to 20 carbon atoms, preferably up to 18 and more preferably up to 16, R b is select from the group consisting of the hydrogen and hydroxy groups, and m is 1 to 4, preferably 2 to 3 and more preferably 3, with a hydroxy group at most in any of the remains (C (R b) 2).

The preferred R2 is hydrogen or an alkyl C 1 -C 3 and more preferably methyl. He Preferred R3 is a carboxylic acid group C 1 -C 4 or a sulfonate group C 1 -C 4, or an alkyl C 1 -C 3 and more preferably a group methyl. The preferred R4 is (CH2) n where n is a integer from 1 to 10, preferably from 1 to 6, plus preferably from 1 to 3.

Some common examples of betaine / sulfobetaine are described in patents with numbers US-2,082,275, US-2,702,279 and US 2,255,082, incorporated by reference in the present memory

Examples of alkyldimethyl betaines particularly Suitable include coco-dimethyl betaine, lauryl dimethyl betaine, decyl dimethyl betaine, acetate 2- (N-decyl-N, N-dimethyl ammonium), acetate 2- (N-coco N, N-dimethylammonium), myristyldimethyl betaine, palmityldimethyl betaine, cetyl dimethyl betaine, stearyl dimethyl betaine. For example, the coco-dimethylbetaine is in the market with the trade name Amonyl 265® of the company Seppic. The lauryl betaine is marketed by Albright & Wilson with the Registered name Empigen BB / L®.

Examples of amidobetains include the cocoamidoethylbetaine, cocoamidopropylbetaine or acyl C10-C14 acid amidopropylene (hydropropylene) sulfobetaine fatty. For example, C10-C14 acyl acid amidopropylene (hydropropylene) sulfobetaine Fat is marketed by Sherex Company under the brand "Varion CAS® sulfobetaine ".

Another example of betaine is the lauryl-imino-dipropionate, marketed by Rhone-Poulenc under the brand Mirataine H2C-HA®.

Suitable cationic surfactants are those alkyltrimethylammonium halides and surfactants of formula:

[R 2 (OR 3) y] [R 4 (OR 3) y] 2 R 5 N + X -

where R2 is a group alkyl or alkylbenzyl having 8 to 18 carbon atoms in the alkyl chain, each of the R3 is selected from the group consisting of -CH2CH2-, -CH2CH (CH3) -, -CH 2 CH 2 CH 2 -, and mixtures thereof; each of the R 4 is selected from the group consisting of alkyl C 1 -C 4, residues of benzyl rings formed by the union of the two R 4 groups, and hydrogen when and it is not 0; R 5 is the same as R 4 or is an alkyl chain in the one that the total number of carbon atoms of R2 plus R5 is not greater than about 18; every y is from 0 to approximately 10 and the sum of the values and is 0 to about 15; and X is any compatible anion. The most preferred cationic compounds are trimethyl chlorides C8-C20 linear ammonium or branched.

Pigments

The pigment is another essential component of the colored thickened compositions of the present invention.

The pigments suitable for use in the present invention are selected from the group consisting of Blue ultramarine and its equivalents, chlorinated indantrene and its equivalents, cobalt blue aluminate and mixtures thereof.

A preferred pigment used herein Invention is ultramarine blue. It is marketed as "C.I. Pigment Blue 29; C.I. 77007 "and it is a blue pigment that It is found in nature in the form of the mineral Lapis Lazuli. Be manufactures by calcining a mixture of kaolin, Na2CO3 (or Na 2 SO 4), S and carbon. It is believed that the resulting product It has the formula Na7 {AI} {6} Si_ {6} O_ {24} S2 {. He Pigment is insoluble in water and decomposes rapidly by the action of acids, including carbonic acid, with release of H2_S.

"It is used as a pigment for stamping fabrics, wallpaper for walls, marbled soap; bluish in the laundry colored tile, cement, rubber, though currently it has been widely replaced by dyes of coal tar. "Merck Index, 9th ed. The Ultramarine Blue is marketed by Whittaker, Clark & Daniels, Inc. The degree 5017 has a particle size range of 0.2 to 3.0 micrometers and grade 5151 has a size range of 0.3 to 1.3 micrometer particle.

Another preferred pigment is C.I. 69825, known as C.I. Vat Blue and C.I. Pigment Blue 64. They have the following chemical formula:

one

This pigment C.I. 69825 is marketed by Crompton & Knowles Corporation under the name Intravat Blue®.

The pigment or a mixture thereof is present. in the compositions of the present invention at concentrations of 0.0001% to 0.5%, preferably 0.0002% to 0.05%, plus preferably from 0.003% to 0.02% and most preferably from 0.006% at 0.015%.

The preferred pigment for use in the compositions colored thickened bleaches of the present invention is the Ultramarine blue Although the pigments, and especially the Ultramarine blue, are inert against hypochlorite oxidation and do not catalyze the decomposition of the type bleach hypochlorite, are insoluble and have to be suspended in the bleaching composition of hypochlorite. This type of suspension does not is achieved by simple addition of ultramarine blue particles to the hypochlorite composition, because the pigment has a density of 2.35 and sediment, even at very large particle sizes fine. The gelling surfactants used in the compositions of the present invention, that is, the alkyl alkoxy sulfate and the optional auxiliary surfactant allow a suspension excellent pigment and especially pigment particles Ultramarine blue

pH

The pH of the liquid compositions, as is, according to the present invention it is typically from 10 to 14, more preferably from 12 to 14 measured at 25 ° C. Liquid compositions of the invention have a pH of 7.5 to 13, preferably 8 to 12 and more preferably from 8.5 to 11.5 when diluted in 1 to 500 times its weight in water. 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. The pH range is Properly provides the hypohalite bleach mentioned previously herein, which consists of alkalis, and optionally also the pH buffer component. But nevertheless, A powerful source of alkalinity can also be used.

Suitable sources of alkalinity are alkalis caustics such as sodium hydroxide, potassium hydroxide and / or lithium hydroxide, and / or alkali metal oxides such as sodium oxide and / or potassium oxide. A source of alkalinity preferred potent is a caustic alkali, more preferably the sodium hydroxide and / or potassium hydroxide. Concentrations characteristics of such caustic alkalis vary from 0.1% to 1.5% in weight, preferably from 0.5% to 1.5% by weight of the composition.

The composition according to the invention can understand other additional components as components pH buffers, stabilizing agents, other surfactants stable against bleaches, reinforcing additives of the detergency, thickeners, polymers, dyes, solvents, perfumes, brighteners and mixtures thereof.

Optional pH buffer components

The compositions according to the present invention may optionally comprise a pH buffer component or a mixture thereof. A pH buffer component of this type is a very preferred optional ingredient in the compositions of the 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.

PH buffer components suitable for their use in the present invention are selected from the group consisting of alkali metal salts such as carbonates, polycarbonates, sesquicarbonates, silicates, polysilicates, boron salts, phosphates, stannates, aluminates and mixtures thereof. Metal salts Preferred alkaline for use in the present invention are those of sodium and potassium

Boron salts or mixtures thereof Suitable for use in the present invention include borates of alkali metals and alkylborates or mixtures thereof. Some Examples of boron salts include boric acid salts and metals alkalines such as metaborates, tetraborates, octoborates, pentaborates, dodecaborate, borotrifluorides and alkylborates that they contain 1 to 12 carbon atoms, preferably 1 to 4. Suitable alkylborates include methylborates, ethylborates and propylborates Particularly preferred boron salts in the present invention are alkali metal metaborates, such as the sodium metaborate, potassium metaborate and borates of alkali metals such as sodium borate, or mixtures thereof. Boron salts such as sodium metaborate and tetraborate sodium are marketed by Borax and Societa Chimica Larderello with the name of sodium metaborate and Borax®.

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 included in the preparation of hypohalite bleaches usually contain by-products, such as p. eg calcium carbonate, in amounts of up to 0.4% by weight of by-product in the hypohalite composition. However, in this quantity the by-product does not present the action buffer described above.

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

The presence of a pH buffer component of this type in the bleaching compositions of the present invention improves effective bleaching performance as well as the safety of fabric of said compositions.

Stabilizing agents

The compositions according to the present invention comprise a stabilizing agent selected from an eliminator of radicals or mixtures thereof, optionally together with an agent chelator or a mixture thereof.

The radical scavengers suitable for your Use in the present invention include radical scavengers aromatics comprising an unsaturated ring system from 3 to 20 carbon atoms, preferably from 3 to 18 and more preferably from 5 to 14, and that have a double bond comprising a total of 4n + 2 electrons, where n is an integer from 0 to 4, preferably from 1 to 3. Indeed, said eliminators of aromatic radicals include benzene derivatives, derivatives of naphthalene, anulene derivatives, cyclopentadiene derivatives, cyclopropylene derivatives and the like, especially arylcarboxylates and / or arylsulfonates.

Radical scavengers particularly suitable (arylcarboxylates, arylsulfonates and derivatives of the same) for use in the present invention have one of the formulas following:

to)

2

b)

3

C)

4

d)

5

where each X, Y, and Z are -H, -COO-M +, -Cl, -Br, -SO 3 -M +, -NO 2, -OCH 3, or groups C 1 to C 10 alkyl primary or secondary and M is H or a alkali metal, or mixtures thereof. The examples of these components include pyromellitic acid, that is, when X, Y and Z are -COO-H +; hemimelitic acid and acid trimellitic, that is, when X and Y are -COO-H + and Z is H. In the present invention it is preferred to use as radical scavengers phthalic acid; sulfophthalic acid; other monosubstituted phthalic acids; benzoic acids disubstituted; alkylbenzoic acids, chlorobenzoic acids, bromobenzoic, sulfobenzoic, nitrobenzoic and alkoxybenzoic, is that is, where Y and Z are -H and X are C1 to alkyl groups C_ {10} primary and secondary, -Cl, -Br, -SO 3 -H +, -NO 2 or -OCH 3 (acid anisic) and substituted sulfonic acids. Very preferred examples of radical scavengers useful in the present invention are acidic benzoic acid, toluic acid 4-toluene sulfonic acid 3-nitrobenzoic acid 2-n-octylbenzoic acid 2-n-octylsulfonic acid, anisic acid or mixtures thereof. The most preferred in the present invention they are benzoic acid, methoxybenzoic acid and / or acid 3-nitrobenzoic.

All described radical scavengers are the acid form of the species, that is, that M is H. It is planned that the present invention also covers derivatives in the form of salt of these species, that is, M is an alkali metal, preferably sodium or potassium. In fact, since the pH of the compositions of the present invention are in the range alkaline, the radical scavengers of the present invention are found primarily as the ionized salt in the composition aqueous of the present invention. The anhydrous derivatives of certain species described above herein they can also be used in the present invention, e.g. eg the pyromellitic dianhydride, phthalic anhydride, anhydride sulfophthalic and the like.

Chelating agents suitable for use in the The present invention may be any of those known to the experts in the art, such as those selected from the group that comprises phosphonate type chelating agents, chelating agents of phosphate type, substituted aromatic type chelating agents polyfunctionally, acids ethylenediamino-N, N'-disuccinics, or mixtures thereof.

Suitable phosphonate type chelating agents for use in the present invention may include the ethane-1-hydroxy diphosphonates (HEDP) alkali metal, alkylene poly (alkylene phosphonate), as well as the compounds of aminophosphonate, including acid amino-aminotri (methylene phosphonic) (ATMP), the nitrile-trimethylene phosphonates (NTP), the ethylene diamino tetramethylene phosphonates, and the diethylene triamino pentamethylene phosphonates (DTPMP). Phosphonate compounds may be present in their acidic 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 pentamethylene phosphonate (DTPMP) and the ethane-1-hydroxy diphosphonate (HEDP). The phosphonate type chelating agents mentioned are marketed by Monsanto under the registered trademark DEQUEST®.

Suitable phosphate chelating agents They are as follows: Phosphonic acid can condense on the reaction

6

The reaction can be repeated with any of the reactive OH groups obtaining phosphate type ingredients that They may be

-

linear or branched polyphosphates of structure

7

-

when R is M or

8

-

when M is a counterion, preferably of an alkali metal;

-

when O? N + m <500 (if n + m = 0, the compound is acidic phosphonic)

-

cyclic polyphosphates (also called metaphosphates), of structure

9

-

when R is M or

10

-

yes R is

eleven

the phosphate compound contains cycles and branched chain and can be called ultraphosphate.)

-

in where M is a counterion, preferably alkali metal

-

in where O \ n n + m <500

All these phosphate ingredients are suitable for use in the present invention and preferred are linear phosphate ingredients (i.e. R is M) where n is 1 (pyrophosphates) and n is 2 (tripolyphosphates (STPP)) and with maximum preference where n is 2. The form of these phosphates normally More available is that corresponding to M = sodium.

Phytic acid, which is a chelating agent particularly suitable for use in the present invention, it is a hexa-phosphoric acid found in seeds of many cereals, usually in the form of salt Insoluble calcium-magnesium. Can also be obtained from macerated corn solution. Quality phytic acid Commercial is marketed by J.T. Baker Co., p. eg, as a solution 40% aqueous. It is intended that the present invention cover the acidic form of phytic acid as well as its derivatives in the form of alkali metal salts, particularly sodium or potassium. Phytate Sodium is marketed by Jonas Chemical Co (Brooklyn, N.Y.). From fact, given that the characteristic pH of the compositions of the present invention is in the alkaline range, the component phytic acid is found in the liquid compositions of the present invention primarily in the form of ionized salt, including when added in its acidic form. Mixtures of said salts of Phytic acid are also covered by the invention.

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

A preferred biodegradable chelating agent for use in the present invention is the acid ethylenediamino-N, N'-disuccinic or alkali metal or alkaline earth metal salts, salts of ammonium or substituted ammonium or mixtures thereof. Acids ethylenediamino-N, N'-disuccinics, especially the isomer (S, S), are widely described in US Patent 4,704,233, issued to Hartman and Perkins on November 3, 1987. Acids ethylenediamine-N, N'-disuccinics are marketed, for example, by Palmer Research Laboratories with the registered trademark ssEDDS®.

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

Typically, the compositions according to the The present invention may comprise from 0.01% to 10% by weight of the total composition of a stabilizing agent, or mixtures of the themselves, preferably 0.01% to 8% by weight, more preferably from 0.1% to 5%, and most preferably from 0.2% to 3%.

Currently it has been found that the addition of a radical scavenger only, or optionally together with an agent chelating, the compositions of the present invention increase the rheological stability of the compositions.

Here the term "stability rheological "means that the compositions herein invention do not lose more than 30% of the initial viscosity after age the composition for 10 days at 50 ° C, preferably not more than 25% and more preferably not more than 20%.

Indeed, it is believed that the radical scavenger reacts with the free radicals present resulting from the decomposition of hypohalite bleacher radicals e prevents these from reacting or oxidizing with the alkyl (alkoxy) 2-4 sulfates. The agents chelants present also have a tendency to bind impurities in the form of metal ions (e.g., copper, iron, manganese and similar) present in the compositions (e.g., as a byproduct of the raw material), thus preventing them from attacking the hypochlorite bleaching and thus limiting the formation of free radicals, which would otherwise form in the presence of said impurities in the form of metal ions. So, the addition of chelating agents together with radical scavengers contributes to confer excellent rheological stability during Aging of the compositions.

It has also been discovered that the addition of a radical scavenger, only or optionally together with an agent chelating, to the compositions of the present invention, in addition to increase the rheological stability of the compositions, improve the ability to remove stains and / or improve the ability to tissue bleaching during the aging of compositions

The bleaching effect, that is, the effect preventive yellowing when the composition ages can be evaluated by comparing a composition according to the present invention (e.g., a composition according to the present invention that comprise a hypohalite bleach, an alkyl (alkoxy) 2-4 sulfate, a surfactant optional auxiliary, a pigment and a stabilizing agent) with a reference composition (e.g., the same composition but without the stabilizing agent) during the aging of the compositions (e.g., after a prolonged period of storage of the same).

The degree of yellowing can determined by visual or instrumental inspection. The yellow color difference between samples treated with different compositions can be determined visually by a Expert jury Instrumental assessment can be done with colorimeter aid such as Ganz Griesser® instruments (e.g., Datacolor® Spectraflash® SF 500, Machbet White-eye® 500) ZEISS ELREPHO® or others, marketed p. e.g., by Hunterlab® or Gardner®.

The ability to remove stains at aging composition can be evaluated by comparing compositions of the present invention with a composition of reference during the aging of the compositions. The stain removal ability can be determined visually with different spots like, e.g. e.g. grease spots or spots enzymatic

Advantageously, the presence of the agents stabilizers can also help reduce the loss of tensile strength of tissues and / or discoloration, particularly in a wash pretreatment application of clothes. Tissue safety can be assessed by different test methods, including the polymerization test method UNI (Ente Nazionale Italiano di Unificazione) 8282-Determination of intrinsic viscosity in solution of cupriethylene diamine (CED).

Optional surfactants

The liquid compositions of the present invention may also comprise another surfactant or a mixture thereof in addition to the alkyl (alkoxy) 2-4 sulfate and optional auxiliary surfactant mentioned earlier in the present report. These other surfactants may be present in the compositions of the present invention in amounts of up to 30% by weight of the total composition, preferably from 0.1% to 20% and more preferably from 1% to 10%.

The surfactants for use in the present invention include other anionic surfactants, nonionic surfactants, cationic surfactants, amphoteric surfactants, surfactants of hybrid ion and mixtures thereof, as long as they do not affect the viscosity and rheological properties of the compositions according to the present invention. Naturally, for the purpose of invention, additional surfactants have to be stable against the hypohalite bleach.

Optional polymers

An optional component of the compositions of the The present invention is a polymer. Has been found, surprisingly, that polymers also reduce coloration yellow of the tissues treated with them, that is, they improve their Whiteness and tissue safety. Naturally, for the purpose of the invention, the polymer has to be stable against hypohalite bleaching.

Polymers suitable for use in the The present invention are polymers comprising monomer units selected from the group consisting of carboxylic acids unsaturated, polycarboxylic acids, sulfonic acids, acids phosphonic and mixtures thereof. The copolymerization of the monomer units mentioned to each other or with other comonomers such as styrene sulfonic acid.

Preferred examples of this type of polymers are polymers and copolymers of selected monomer units from the group consisting of acrylic acid, maleic acid, acid vinyl sulfonic and mixtures thereof. They are also suitable for their use in the present invention polymers and copolymers before mentioned that are modified to contain other groups functional as aminophosphonic and / or phosphonic units. The Most preferred polymers are selected from the group consisting of polyacrylate polymers, acrylic acid and acid copolymers maleic, copolymers of styrene sulfonic acid and maleic acid, and mixtures thereof, preferably modified with groups aminophosphonic and / or phosphonic.

The molecular weight of these polymers and copolymers is preferably less than 100,000 and with maximum preference of 500 to 50,000. Most polymers and Suitable copolymers for use in the present invention will be soluble in amounts of up to 0.1% by weight in a composition aqueous comprising 5% by weight of sodium hypochlorite, with its pH set to 13 with sodium hydroxide.

Polymers of this type commercially available and suitable for use in the present invention are the polyacrylate type polymers, sold under the registered name Good-Rite® by BF Goodrich, Acrysol® by Rohm & Haas, Sokalan® by BASF, Norasol® by Norso Haas. Are too suitable for use in the present invention are copolymers of styrene sulfonic acid and maleic acid, marketed with the National Starch Versaflex® registered name as Versaflex 157, as well as Rohm and Haas Acumer® terpolymers, particularly Acumer® 3100. Preferred polymers are commercially available polyacrylate polymers, especially polymers of Norasol® polyacrylate, and the polymer of Norasol® 410N polyacrylate (PM 10,000) and polyacrylate polymer modified with phosphonic groups Norasol® 440N (PM 4000) and its corresponding Norasol® QR 784 acid form (PM 4000).

A preferred polymer for use herein invention is a polyacrylate polymer modified with groups phosphonic, which is marketed under the registered name Norasol® 440N (PM 4000) and its corresponding acidic form Norasol® QR 784 (PM 4000) from Norso-Haas.

In the present invention they can be used also polymer blends such as those described herein memory.

The polymers in the present invention are preferably found in low amounts, that is, in amounts up to 10% by weight, preferably up to 1%, more preferably from 0.001% to 0.5% by weight, most preferably from 0.005% to 0.2% by weight of the liquid composition.

Optional brighteners

The compositions according to the present invention they can also comprise as an optional ingredient a brightener or a mixture thereof. Naturally, for the purpose of the invention, the brightener must be stable against the type bleach hypohalite The presence of brighteners may be desirable. in the present invention to enhance the bleaching capacity of the compositions of the present invention.

Brighteners are compounds that have the ability to fluoresce when absorbing wavelengths corresponding to the ultraviolet and send the visible light. The brighteners, also called bleaching agents Fluorescent (FWA), have been widely described in the art as, for example, in EP-A-0 265 041, EP-A-0 322 564, EP-A-0 317 979 or "Fluorescent whitening agents "by A.K. Sarkar, published by MERROW, particularly pages 71-72.

The commercial optical brighteners that they can be useful in the present invention can be classified in subgroups that include, but not necessarily in a way excluding, derivatives of stilbene, pyrazoline, coumarin, acid carboxylic, metinocyanines, dibenzothiophene-5,5-dioxide, azoles, heterocycles with 5 and 6 member rings and other various agents. Examples of these brighteners are described in "The Production and Application of Fluorescent Brightening Agents "by M. Zahradnik, published by John Wiley & Sons, New York (1982). Other optical brighteners that may be used herein invention include naphthylimide, benzoxazole, benzofuran, benzimidazole and any mixture thereof.

In US Pat. No. 4,790,856 describe examples of optical brighteners useful in the present invention These brighteners include the series PHORWHITE® from Verona. Other brighteners described in this Reference include: Tinopal-UNPA®, Tinopal CBS® and Tinopal 5BM® marketed by Ciba-Geigy; Artic White CC® and Artic White CWD®; the 2- (4-styrene-phenyl) -2H-naphtho [1,2-d] triazoles; 4,4'-bis (1,2,3-triazol-2-yl) -stilbenes; 4,4'-bis (stretch) bisphenyls; and the amino coumarins

Specific examples of brighteners useful in the present invention include 4-methyl-7-diethyl-amino coumarin; 1,2-bis (-benzimidazol-2-yl) ethylene; 1,3-diphenyl-pyrazolines; 2,5-bis (benzoxazol-2-yl) thiophene; 2-styrene-naphtho- [1,2-d] oxazole; 2- (stilben-4-yl) -2H-naphtho [1,2-d] triazole, 3-phenyl-7- (isoindolinyl) coumarin; 3-methyl-7- (isoindolinyl) coumarin; 3-chloro-7- (isoindolinyl) coumarin; 4- (isoindolinyl) -4'-methyl ethylbeno; 4- (isoindolinyl) -4'-methoxystilbene; 4- (isoin-
sodium dolinyl) -4'-stilbenesulfonate; 4- (isoindolinyl) -4'-phenyl ethylbeno; 4- (isoindolinyl) -3-methoxy-4'-methyl ethylbeno; 4- (2-Chloroisoindolinyl) -4 '- (2-methylisoindolinyl) -2,2'-stilbendiisosulfonic acid; Disodium 4,4'-diisoindolinyl-2,2'-stilbene disulfonate; 4,4'-diisoindolinyl-2,2'-stilbene disulfonamide; 4,4 '- (7,8-dichloro-1-isoindolinyl) -2,2-stilbene disulphonate disodium; 4,4 '- (7-chloro-1-isoindolinyl) -2,2-stilbene disulfonate disodium; 4,4 '- (6-isopropoxy-1-isoindolinyl) -2,2-stilbene disulphonate disodium; 4,4 '- (7,8-diisopropyl-1-isoindolinyl) -2,2-stilbene disulphonate disodium; 4,4 '- (7-Butoxy-1-isoindolinyl) -2,2-stilbene disulphonate disodium; 4,4 '- (6-trifluoromethyl-1-isoindolinyl) -2,2-stilbene disulphonate disodium; 4,4 '- [6- (1,4,7-trioxanonyl) -1-isoindolinyl)] - 2,2-stylobenzene disulfonate disodium; 4,4 '- (7-methoxymethyl-1-isoindolinyl) -2,2-stilbene disulphonate disodium; 4,4 '- (6-phenyl-1-isoindolinyl) -2,2-stilbene disulfonate disodium; 4,4 '- (6-naphthyl-1-isoindolinyl) -2,2-stilbene disulfonate; 4,4 '- (6-methylsulfonyl-1-isoindolinyl) -2,2-stilbene disulfonate disodium; 4,4 '- (7-cyano-1-isoindolinyl) -2,2-stilbene disulfonate disodium; and 4,4 '- [7- (1,2,3-trihydroxypropyl) -1-isoindolinyl)] -2,2-stilbene disodium disodium; Disodium 4-isoindolinyl-4'-ethoxy-2,2'-stilbene disulfonate; Disodium 4-isoindolinyl-4'-methoxy-2,2'-stilbene disulfonate; Disodium 4-isoindolinyl-4'-ethoxy-2,2'-stilbene disulfonamide; 4-isoindolinyl-4'-methyl-
2,2'-stilbene disulfonamide disodium; 4,4'-bis (4-phenyl-2H-1,2,3-triazol-2-yl) -2,2'-stilbendisulfonic acid and mixtures thereof. For more examples of brighteners useful in the present invention, see patents US-3,646,015, US-3,346,502 and US-3,393,153.

Indeed, one of the salts with functionality acid-derived equivalent 4,4'-bis (4-phenyl-2H-1,2,3-triazol-2-yl) -2,2'-stilbendisulfonic acid, namely its sodium salt, is marketed by Mobay Chemical Corporation, a subsidiary of Bayer AG, with the name Phorwite® CAN. The Aminic salt is marketed by Molay under the name Phorwite® CL solution. Potassium salt is marketed under the name of Phorwite® BHC 766.

Other specific examples of brighteners Optics useful in the present invention are those of the formula structural:

12

in which 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-methyl-amino, morpholino, chlorine and amino; and M is a salt-forming cation like the sodium cation or cation potassium.

When, in the previous formula R_ {1} is anilino, R2 is N-2-bis-hydroxyethyl and M is a sodium cation, the brightener is acid 4,4'-bis - [(4-anilino-6- (N-2-bis-hydroxyethyl) -s-triazin-2-yl) amino] -2,2'-stilbenedisulfonic acid and its disodium salt. This particular kind of brightener is marketed under the name Tinopal UNPA-GX by Ciba-Geigy Corporation. Tinopal UNPA-GX is the hydrophilic optical brightener preferred useful in detergent compositions herein invention.

When in the above formula R_ {1} is anilino, R2 is N-2-hydroxyethyl-N-2-methylamino and M is a sodium cation, the brightener is the disodium salt of acid 4,4'-bis [(4-anilino-6- (N-2-hydroxyethyl-N-methylamino) -s-triazin-2-yl) amino] -2,2'-stilbenedisulfonic acid. This particular kind of brightener is marketed with the name Tinopal 5BM-GX by Ciba-Geigy Corporation

When in the above formula R_ {1} is anilino, R2 is morpholino and M is a sodium cation, the brightener is the acid sodium salt 4,4'-bis [(4-anilino-6-morpholino-s-triazin-2-yl) amino] -2,2'-stilbenedisulfonic acid. This particular kind of brightener is marketed under the Tinopal name AMS-GX by Ciba-Geigy Corporation

Other substituted acid derivatives stilbene-2,2'-disulfonic include He too 4-4'-bis (2-2 ' styryl sulfonate) biphenyl, marketed by Ciba-Geigy with the registered name Brightener 49® u other hydrophilic brighteners such as Brightener 3® or Brightener 47®, also marketed by Ciba-Geigy.

Other specific examples of brighteners useful in the present invention include oxazole derivatives polycyclic such as benzo-oxazole derivatives, or mixtures thereof, being particularly preferred in the present invention type derivatives benzo-oxazole. An example of this type of Brightener is the 2,2 '- (thiophenyldil) bis benzoxazole of the formula C18H10N2O2S, marketed by Ciba-Geigy with the registered name Tinopal SOP®. This brightener is almost insoluble in water, that is, it has a solubility of less than 1 gram per liter Another example of brightener of this type is the bis (sulfobenzofuranyl) biphenyl, marketed by Ciba-Geigy with the registered name Tinopal PLC®

Typically, the compositions according to the The present invention comprises up to 1.0% by weight of the total composition of a brightener or a mixture thereof, preferably from 0.005% to 0.5%, more preferably from 0.005% to 0.3% and most preferably from 0.008% to 0.1%.

Surface bleaching process

In the present invention the composition liquid bleach has to get in touch with the surface What do you want to try?

In the present invention it is understood by "surfaces" any inanimate surface. These surfaces inanimate include, without excluding other possible ones, the rigid surfaces that are typically found in kitchens or bathrooms in homes or inside cars as, p. eg, tiles, walls, floors, chrome, glass, vinyl smooth, any type of plastic, plasticized wood, tables, sinks, kitchen countertops, dishes, toilets as sinks, showers, shower curtains, sinks, toilets and the like, as well as fabrics including clothing, curtains, curtains, clothing bed, towels, tablecloths, sleeping bags, tents, upholstered furniture and the like, and carpets and carpets. In the inanimate surfaces are also included, although not in shape excluding, household appliances such as refrigerators, freezers, clothes washers, automatic dryers, ovens, microwave, dishwasher, etc.

In this report it is understood as "treat a surface "the bleaching and / or disinfection of said surface, since the compositions of the present invention they comprise a hypohalite bleach, as well as cleaning, that is, the removal of various types of spots from the surface, since said compositions comprise an alkyl (alkoxy) 2-4 sulfate and optionally a auxiliary surfactant

Therefore, the present invention is also refers to a process for the treatment (e.g., bleaching) of a tissue as inanimate surface. In such a process it gets in contact with a composition according to the present invention with the tissue treated.

This can be done in the so-called "mode pretreatment ", in which a liquid bleaching composition, as defined herein, it is applied in pure form on said tissues before proceeding to rinse them, or wash them and clarify them, or in a "soak mode", in which a composition liquid bleach, as defined herein, is Dilute previously in an aqueous bath and the tissues are submerged and soak in the bathroom before proceeding to rinse them, or in a "mode during washing ", in which a bleaching composition liquid, as defined herein, is added to a liquor wash formed by dissolution or dispersion of a detergent Typical laundry. It is also essential in both cases lighten the tissues after having been in contact with said composition and before said composition has dried totally.

The surface treatment processes and fabrics according to the present invention, especially fabrics, offer an effective bleaching capacity and / or an effective capacity for stain removal during the aging of compositions

The compositions according to the present invention are they contact the tissues preferably in liquid form. Here the expression "in liquid form" means that the liquid compositions themselves according to the The present invention are in pure form or in diluted form.

The compositions according to the present invention are typically used in diluted form in a wash operation of clothes. Hereby "in diluted form" is understands that the 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, as well as by other procedures, p. Eg in a washing machine. These compositions they can be diluted up to 500 times, preferably 5 to 200 times and more preferably 10 to 80 times.

More specifically, the bleaching process of fabrics according to the present invention comprise the steps of putting first contacting said tissues with a bleaching composition according to the present invention, in its diluted form, below allow said tissues to remain in contact with said composition for a period sufficient to bleach said tissues, typically 1 to 60 minutes, preferably 5 to 30 minutes, and then rinse said tissues with water. When said fabrics have to be washed, namely with a composition conventional comprising at least one surfactant, said washing can be done together with the bleaching of said tissues simultaneously contacting said tissues with a bleaching composition according to the present invention and with said detergent composition, or said washing can also be performed before or after bleaching said tissues. Therefore said process according to the present invention allows to bleach tissues and, optionally, wash fabrics with a detergent composition that comprises at least one surfactant before the step of putting in contact of said tissues with said bleaching composition and / or at the stage in which said tissues come into contact with said bleaching composition and / or after the stage in which said tissues are contacted with the bleaching composition and before of the rinse stage and / or after the rinse stage.

In another embodiment of the present invention the tissue bleaching process comprises the step of putting in contact the tissues with a liquid bleaching composition according to the present invention, in its pure form, leaving said tissues in contact with said bleaching composition for a period enough to bleach said tissues, typically 5 seconds to 30 minutes, preferably 1 minute to 10 minutes, and to then rinse said tissues with water. When said tissues they have to wash, p. eg, with a conventional composition that it comprises at least one surfactant, said washing can be done before or after bleaching said tissues. In the embodiment of the present invention in which the composition liquid bleach of the present invention is contacted with tissues in their pure form, it is preferred that the concentration of hypohalite bleach is 0.01% to 5%, preferably of 0.1% to 3.5%, more preferably 0.2% to 2% and with maximum Preference from 0.2% to 1%. Advantageously, the present invention provides liquid bleaching compositions containing hypohalite that can be applied purely on the tissue that want to bleach, despite the prevailing prejudice against pure use on fabrics of compositions that They contain hypochlorite.

In the present invention it is preferred to perform the bleaching process before washing said fabrics. Indeed, it has observed that the bleaching of said tissues with the compositions according to the present invention (bleaching processes in diluted form and / or pure) before washing with a detergent composition provides greater whiteness and improves stain removal with less expense of energy and detergent against the previous washing of said fabrics and its subsequent bleaching.

Alternatively, instead of performing the pure bleaching process described above in the present memory (pretractant application) followed by a stage of rinse with water and / or a conventional washing stage with a conventional liquid or powder detergent, the operation of bleaching pretreatment can also be followed by the process of bleaching in diluted form described hereinabove memory, either in a bucket (manual operation) or in a washing machine.

In another embodiment the present invention is also refers to a rigid surface treatment process As an inanimate surface. In such a process it is put into contact a composition as defined herein with Rigid surfaces subject to treatment. In this way, the The present invention also relates to a process of treating a rigid surface with a composition as defined in the present report, wherein said process comprises the stage of applying said composition to said rigid surface, preferably only to stained parts of said rigid surface, and optionally the step of clearing said rigid surface.

In the surface treatment process rigid according to the present invention the composition as defined here it can be applied to the surface object of treatment in its pure form or in its diluted form, typically up to 200 times its weight in water, preferably 80 to 2 times its weight in water, and more preferably 60 to 2 times.

When the compositions according to the present invention are used as bleaches / disinfectants of Rigid surfaces are easily removed by rinsing and provide good gloss characteristics to surfaces treated.

"Rigid surfaces" means any rigid surface like those mentioned above in the Present memory, as well as dishes.

Examples

The invention is illustrated by the following examples, which do not exclude other possible ones. The percentages are Express by weight, unless otherwise indicated.

13

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14

16

17

Na C_ {12} -C_ {14} E3S is a C 12/14 alkyl (ethoxy) 3 sulfate marketed by Rhone Poulenc and Albright & Wilson.

Na C_ {12} -C_ {14} E2S is a C 12/14 alkyl (ethoxy) 2 sulfate marketed by Rhone Poulenc

Na C_ {12} -C_ {14} E1S is a C 12/14 alkyl (ethoxy) 1 sulfate sold by Rhone Poulenc

NaC 8 S is C 8 alkyl sodium sulfate.

Betaine is lauryl dimethyl amino betaine from Albright & Wilson.

LAS is sodium paraffin-benzene sulphonate Albright & Wilson.

All the above compositions are chemistry and physically stable in accelerated storage conditions, it is say that the compositions of the previous examples do not have losses greater than 25% of free Cl2 after 5 days of storage at 50 ° C and show no visible sedimentation of pigment after storage for 10 days at 50 ° C.

Also, these compositions have a effective ability to remove stains and bleach when used in a laundry application in pure form or in diluted form, e.g. e.g. 200 times its water weight, after prolonged storage periods, e.g. eg, after 3 months storage at room temperature (25ºC) after manufacturing.

These compositions also have a capacity effective cleaner when used in any application of Domestic cleaning.

Claims (17)

1. A thickened liquid bleaching composition colored having a viscosity of 10 cps at 2000 cps, measured with a Carri-med CSL2-100® rheometer, to the following viscosity parameters: angle 1º58 ', separation 60 um, diameter 4.0 cm, shear force 63.60 dynes * cm * s 2, temperature 25 ° C and a friction rate of 30 s -1 and that understands:

-

a hypohalite bleach,

-

a alkyl (alkoxy) n sulfate, where n is from 2 to 4,

-

a optional auxiliary surfactant,

-

a pigment selected from the group consisting of ultramarine blue and its equivalents, chlorinated indantrene and its equivalents, aluminate blue of cobalt and mixtures thereof,

-

and a stabilizing agent selected from radical scavengers and mixtures thereof.

2. A composition according to any of the previous claims, wherein said type bleach Hypohalite is an alkali metal sodium hypochlorite. 3. A composition according to any one of the previous claims, wherein said type bleach hypohalite, based on active halide, is present in an amount from 0.1% to 20% by weight, preferably from 0.25% to 8% by weight of the total liquid composition. 4. A composition according to any of the previous claims, wherein said alkyl (alkoxy) 2-4 sulfate is a salt or a Water soluble acid of formula: RO (A) n SO 3 M, in where

-

R is a linear or branched C 4 -C 24 alkyl, substituted or unsubstituted, preferably an alkyl C 8 -C 20 linear or branched, plus preferably a linear C 8 -C 18 alkyl or branched and most preferably an alkyl C 10 -C 16 linear or branched,

-

A is an ethoxy or propoxy unit,

-

n is an integer from 2 to 4, preferably 2 or 3, more preferably 3,

-

and M is H or a cation, preferably a metal cation, ammonium cation or substituted ammonium cation, or a mixture thereof.

5. A composition according to any one of the previous claims, wherein the alkyl (alkoxy) 2-4 sulfate or a mixture of It is present in an amount of 0.1% to 20% by weight, plus preferably from 2% to 10% by weight and most preferably from 3% to 8% by weight of the total composition. 6. A composition according to any of the previous claims, wherein said pigment is Blue ultramarine. 7. A composition according to any of the previous claims, wherein said pigment or a mixture thereof is present in the composition at a level of 0.0001% a 0.5% by weight of the total composition, preferably 0.0002% at 0.05% and more preferably from 0.003% to 0.02%. 8. A composition according to any of the previous claims, wherein said stabilizing agent is an aromatic radical scavenger or a mixture thereof, preferably a benzene derivative, naphthalene derivative, anulene derivative, cyclopentadiene derivative, derivative of cyclopropene, aryl carboxylate, aryl sulfonate or a mixture of themselves, more preferably a radical scavenger having a of the following formulas:

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to) 19 b) twenty C) twenty-one d) 22 where each X, Y and Z are -H, -COO-M +, -Cl, -Br, -SO 3 -M +, -NO 2, -OCH 3, or groups C 1 to C 10 alkyl primary and secondary and M is H or a alkali metal, or mixtures thereof, more preferably said radical scavenger is phthalic acid, sulfophthalic acid, other monosubstituted phthalic acid, disubstituted benzoic acid, acid alkylbenzoic acid, chlorobenzoic acid, bromobenzoic acid, acid sulfobenzoic acid, nitrobenzoic acid or alkoxybenzoic acid, that is, wherein Y and Z are -H and X is a C 1 to C 10 alkyl group primary and secondary, -Cl, -Br, -SO 3 -H +, -NO2, or -OCH3, respectively, or a sulfonic acid substituted, even more preferably is benzoic acid, acid toluic, 4-toluene sulfonic acid, 3-nitrobenzoic acid, 2 acid n-octyl-benzoic, 2 n-octyl, sulfonic acid, anisic acid or mixtures thereof. The most preferred in the present invention are the benzoic acid, methoxybenzoic acid and / or acid 3-nitrobenzoic. 9. A composition according to any of the previous claims, which also comprises an agent chelator, preferably a phosphonate type chelating agent, a chelating agent of phosphate type, a chelating agent of type polyfunctionally substituted aromatic, ethylenediamine- N, N'- acids detergents, or mixtures thereof, more preferably sodium pyrophosphate, sodium tripolyphosphate and / or phytic acid. 10. A composition according to any one of the previous claims, wherein the stabilizing agent or a mixture thereof is present in an amount of 0.01% to 10% in weight of the total composition, preferably from 0.01% to 8% by weight, more preferably from 0.1% to 5% and most preferably from 0.2% to 3%. 11. A composition according to any of the previous claims, wherein said auxiliary surfactant is typically selected from the group consisting of alkyl sulfates, alkylarylsulfonates, alkyl (alkoxy) n-sulfates, where n is 1 or more than 4, hybrid ion surfactants, cationic surfactants and mixtures of the same, typically in amounts of 0.01% to 10% by weight of the total composition, preferably from 0.1% to 5% and more preferably from 0.1% to 2.5%. 12. A composition according to any of the previous claims, wherein said composition comprises also a powerful source of alkalinity. 13. A composition according to any of the previous claims, having a viscosity of 25 cps at 1500 cps, and more preferably from 50 cps to 1200 cps. 14. A process of bleaching tissue, which It comprises the stages of:

to)

put on said tissues in contact with a liquid bleaching composition according to any of the preceding claims, in its form diluted or in its pure form,

b)

leave said tissues in contact with said bleaching composition during a sufficient period to bleach said tissues and

C)

finally rinse those tissues with Water.

15. A tissue bleaching process according to the claim 14, wherein the bleaching composition is diluted with water at a dilution level of up to 500 times its weight, preferably 5 to 200 times and more preferably 10 to 80 times. 16. A process according to any of the claims 14 or 15, wherein said fabrics are washed with a detergent composition comprising at least one surfactant before the step of contacting said tissues with said bleaching composition and / or at the stage in which said tissues are in contact with said bleaching composition in its form diluted and / or after the stage in which said tissues are in contact with the bleaching composition and before the stage of rinse and / or after the rinse stage. 17. A surface treatment process rigid with a composition according to any of the claims previous 1 to 13, in which said process comprises the stage of applying said composition to said rigid surface, preferably only to the stained parts of it, and optionally rinse said rigid surface typically with water.