ES2367851T3 - LAUNDRY TREATMENT COMPOSITIONS. - Google Patents

Abstract

A domestic method for treating a textile garment, the method including the following steps: (i) adding a laundry treatment composition comprising between 0.0000001% and less than 0.00005% p of a hydrophobic dye, from 0.005 to 2 % p of a contrast agent selected from: 2- (4-styryl-3-sulfophenyl) 2H-naphthol [1,2-d] triazole sodium, 4,4'-bis {[(4-anilino-6- (N-methyl-N-2-hydroxyethyl) amino-1,3,5-triazin-2-yl)] amino} stilbene 2,2'-disulfonate disodium, 4,4'-bis {[(4-anilino -6-morpholino-1,3,5-triazin-2-yl)] amino} stilbene-2,2'-disulfanate disodium and 4,4'-bis (2-sulfoestyl) biphenyl disodium, and between 2 and 60% p of a surfactant, the hydrophobic dye having an anthraquinone structure, to an aqueous medium, to form a darkening medium; (ii) treat the textile garment with the darkening medium; (iii) rinse the textile material with an aqueous medium; and (iv) dry the treated textile.

Description

Technical field

The present invention relates to laundry treatment compositions with an improved deposition of the dye on a substrate.

Background of the invention

Garments comprising polyester fibers are widely used. Many garments are white, but throughout the life of these garments, the whiteness darkens, reducing the aesthetic qualities of the garment. There is a need to maintain the white appearance of these garments, so that aesthetic qualities are retained for as long as possible.

In modern washing procedures bleaching, contrast and darkening agents are used to maintain whiteness. The contrast agents and darkens that are currently available are not deposited on polyester fibers of garments to a significant degree. All fibers can be subjected to a bleaching procedure, but over time this treatment can lead to the garment adopting a yellow hue

US Patent 3,958,928 describes a liquid dye composition together with methods for its use. The dye composition is a mixture of anthraquinone dyes due to be used with liquid laundry detergents. The composition substantially reduces the dyeing characteristics of undesirable fabrics of a detergent in which the dye is used, while retaining the ability to tile the fabric. The composition is a combination of an oil-soluble dye such as 1,4-bis (2-ethylhexylamino) -antraquinone (CI Solvent Blue 58) with a water-soluble dye such as sodium salt of 1-amino2-sulfo-4 (2-sulfo -para-toluidino) -antraquinone (CI Acid Blue 145) and / or 1,4-bis (3-sodium sulfomethylenyl) anthraquinone (CI Acid Blue 80). The dye described has two carbon branched substituents. The dye levels described are above 0.0005% of the formulation. Long alkyl chains help the incorporation of the highly hydrophobic dye into aqueous surfactant compositions. Surprisingly, a wide range of anthraquinone dyes have been discovered in solvents without long alkyl chains that have a much better function as darkening dyes in homogeneous (isotropic) or granular liquid laundry formulations.

USP 6,521,581 describes the use of anthraquinone dyes in a biphasic liquid detergent composition (anisotropic) with elevated levels of colored inorganic salts.

There is a need to provide a technology that maintains and improves the white appearance of garments comprising polyesters.

DE 2557783 describes water soluble dyes and also describes hydrophobic dyes disperse blue 87 and disperse blue 7 at a level of 0.0001% p. None of these hydrophobic dyes have been shown to be substantive for textiles.

The application being processed simultaneously PCT / EP2005 / 009884, whose publication number is WO 2006032397, describes laundry formulations containing hydrophobic darkening dyes in the range of 0.0001 to 0.1% p, which provide bleaching advantages in synthetic fabrics. It has been found that even lower levels of hydrophobic dyes described in WO 2006032397 provide bleaching advantages in fabrics after multiple washes.

The application being processed simultaneously PCT / EP2005 / 009518, whose publication number is WO 2006053598, describes laundry formulations containing dyes at a low value of 0.00005% p in a final laundry detergent composition.

JP 01/180816 describes a shampoo composition comprising 0.000001% p of an anthraquinone dye.

JP 2004/210961, from Lion Corporation, describes the use of anthraquinone dyes in a liquid detergent composition merely to improve the aesthetic appearance of the liquid detergent composition. The compositions comprise alkanolamine, an anionic surfactant and a nonionic surfactant. In all the examples in JP 2004/210961 an alcohol is present as a solubilizing agent for the dye, that is, 5% p of ethanol is present. In some of the examples propylene glycol is also present to facilitate the solubility of the dye.

The dyes described herein are known to be used for dyeing textile materials in industrial processes performed at elevated temperatures together with high concentrations of dyes and dispersing agents. Surprisingly, dyes can be used to darken at low levels of dye and surfactant and at routine laundry temperatures. It has been found that hydrophobic dyes are not only substantive for polyester fibers under normal household washing conditions, but also provide an advantage of darkening whiteness at low dye levels. The advantages are provided to a range of synthetic fibers, in particular nylon and elastane. A synergy has been found between dyes and specific contrast agents.

If the dyes are applied to conditioning products of the main wash and rinse, the advantages are multiplied.

In one aspect, the present invention provides a domestic method for treating a textile garment, the method including the following steps:

(i)

 add a laundry treatment composition comprising between 0.0000001% and less than 0.00005% p of a hydrophobic dye, 0.005 to 2% p of a contrast agent selected from: 2- (4-styryl-3- sulfophenyl) 2H-naphthol [1,2-d] sodium triazole, 4,4'-bis {[(4-anilino-6- (N-methyl-N-2-hydroxyethyl) amino-1,3,5- triazin-2-yl)] amino} stilbene2,2'-disulfonate disodium, 4,4'-bis {[(4-anilino-6-morpholino-1,3,5-triazin-2-yl)] amino} disodium stilbene-2,2'-disulfanate and 4,4'-bis (2-sulfoestyryl) biphenyl disodium, and between 2 and 60% p of a surfactant, having the hydrophobic dye of an anthraquinone structure, to a medium aqueous, to form a darkening medium;

(ii)

 treat the textile garment with the darkening medium;

(iii) rinse the textile material with an aqueous medium; Y

(iv) dry the treated textile.

Preferably, the anthraquinone is different from one having a branched alkyl or linear alkyl chain of more than seven carbon atoms. Preferably, the alkyl chain has no OH or OMe substituents present in disperse blue 87 and disperse blue 7. Most preferably, the upper limit of a hydrophobic dye is 0.000049% p.

To maintain whiteness, it is preferred that the composition contains a sequestrant to separate transition metals. In this regard, it is preferred that the composition contains less than 3 ppm of free transition metals.

It is preferred that the hydrophobic dye be present in the range of 100 ppt to 800 ppt. Preferably, the aqueous solution has an ionic strength of 0.001 to 0.5. Most preferably, in another aspect, it is preferred that the aqueous solution also comprises 1 ppb to 5 ppm, preferably 5 to 100 ppb of one or more other dyes selected from dye dyes of the cotton group consisting of: dye hydrolyzed reagent; acid dye and direct dye.

The method of the present invention is preferably applied to a soiled textile garment that has been used at least once. It is preferred that the treatment temperature is 10 to 60 ° C, most preferably 15 to 40 ° C.

A "unit dose", as used herein, is a particular amount of the laundry treatment composition used for a type of washing, conditioning or necessary treatment stage. The unit dose may be in the form of a defined volume of powder, granules or tablet or detergent liquid in unit dose.

Detailed description of the invention

Hydrophobic dyes are defined as organic compounds with a maximum extinction coefficient of more than 1000 l / mol / cm in the wavelength range of 400 to 750 nm and which have no charge in aqueous solution at a pH in the range of 7 to 11. Hydrophobic dyes are devoid of polar solubilizing groups. In particular, the hydrophobic dye does not contain any group of sulfonic acid, carboxylic acid or quaternary ammonium. The chromophore of the dye is an anthraquinone dye chromophore

Many examples of hydrophobic dyes are found in the coils of solvent dyes and dispersed.

The darkening of white garments can be done with any color depending on the preferences of the consumer. Blue and Violet are particularly preferred obscurators and, consequently, the dyes or It is preferred that the dye (s) have a peak absorption wavelength of 550 nm to 650 nm, preferably 570 nm to 630 nm. A combination of dyes that have the visual effect together

5 on the human eye as a single dye having a peak absorption wavelength on polyester from 550 nm to 650 nm, preferably 570 nm to 630 nm. This can be provided, for example, by mixing a red and green-blue dye to produce a blue or violet darkening.

A wide range of solvent and suitable dispersing dyes is available. However, some studies

Detailed toxicological agents have shown that a certain number of these dyes are possible carcinogens, for example, disperse blue 1. These dyes are not preferred. More suitable dyes can be selected from solvent and disperse dyes used in cosmetics. For example, as cited by the European Union in directive 76/768 / EEC Annex IV part 1. For example, disperse violet 27 and solvent violet 13.

15 A preferred anthraquinone has the following structure (I):

image 1

wherein R1, R4, R5 and R8 are independently selected from the groups consisting of -H, -OH, -NH2, NHR9 and -NO2, so that a maximum of only one -NO2 group and a maximum are present of two -H as substituents R1, R4, R5 and R8;

wherein R9 is a branched or linear C1-C7 alkyl chain or an aryl group or substituted aryl groups, the branched or linear C1-C7 alkyl chain is preferably unsubstituted with a -OH or -OMe group;

R2, R3, R6 and R7 can be selected from -H, -F, -Br, -Cl, -SO3-aryl or -NO2, and -OR10 in which R10 is selected from the group consisting of C1-C7 alkyl branched or linear or aryl; and R2 and R3 may be together joined to form a five-member non-aromatic ring of the form -C (= O) N (HR11) C (= X) -, in which X is O or NH and R11 is selected from the group consisting of C1-C6 alkyl optionally substituted with alkoxy groups. Be

30 prefers that R9 and / or R10 be a branched or linear alkyl chain and then the chain has less than six carbon atoms and does not have an OH or OMe substituent.

It is preferred that R9 and R10 are not branched and linear alkyl chains; R9 and R10 can be methyl, that is, they are not a chain. It is preferred that R2 and R3 are individual substituents and are not covalently linked from

35 together to form a ring. In particular, it is preferred that R2 and R3 are not joined to form a five-member non-aromatic ring of the form -C (= O) N (HR11) C (= X) -, in which X is O or NH and R11 is selected from the group consisting of C1-C6 alkyl optionally substituted with alkoxy groups.

It is preferred that R1, R4, R5 and R8 be independently selected from the groups consisting of -H, -OH, -NH2

40 and -NO2 and R2, R3, R6 and R7 are selected from -H, -F, Br, Cl or -NO2 and -O-aryl. It is also preferred that the aryl be an optionally substituted phenyl. Of the R1, R4, R5 and R8, it is most preferred that they be -OH and one is selected from -NH2 and -NHR9.

It is preferred that R2, R3, R5, R6, R7 and R8 be -H, R1 = OH, R4 = -NHR9 or -NH2. It is preferred that R5, R6, R7 and R8 = -H, R1 = R4 = -NH2, R2 = R3 = -O-aryl or -Cl.

The most preferred dyes are disperse blue 56, solvent violet 13, disperse violet 26 and disperse violet 28.

50 It is preferred that disperse blue 87 and disperse blue 7 be excluded from the hydrophobic dye of the anthraquinone structure.

The composition may also comprise between 0.0001 and 0.1% p of one or more other dyes selected from dimming dyes for cotton from the group consisting of: hydrolyzed reactive dye; acid dye and direct dye. Examples of preferred acid dyes are: acid blue 62, 40 and

290.

The laundry treatment composition, in addition to the dye, comprises adjuvant ingredients and balancing vehicles up to 100% p of the composition.

These may be, for example, surfactants, detergency builders, foaming agents, antifoaming agents, solvents, contrast agents, bleaching agents and enzymes. The use and quantities of these components are such that the composition yields depending on economic and environmental factors and the use of the composition.

The composition may comprise a surfactant and, optionally, other conventional detergent ingredients. The composition may also comprise an enzymatic detergent composition comprising from 0.1 to 50%, based on the total composition, of one or more surfactants. This surfactant system may in turn comprise 0 to 95% of one or more anionic surfactants and 5 to 100% p of one or more nonionic surfactants. The surfactant system may additionally contain amphoteric or hybrid ion detergent compounds, but this is usually not desired due to its relatively high cost. The enzymatic detergent composition according to the invention will generally be used in the form of a dilution in water of about 0.05 to 2% p.

It is preferred that the composition comprises between 2 and 60% p of a surfactant, most preferably 10 to 30% p. In general, the nonionic and anionic surfactants of the surfactant system can be chosen from the surfactants described in "Surface Active Agents", Vol. 1, of Schartz, Perry and Berch, Interscience 1958, in the current edition of "MaCutcheon's Emulsifiers and Detergents ”Published by the Manufacturing Confectioners Company or in“ Tenside-Taschenbuch ”, H. Stache, 2nd Edn., Carl Hauser Verlag, 1981.

Suitable non-ionic detergent compounds that can be used include, in particular, the reaction products of compounds having a hydrophobic group and a reactive hydrogen atom, for example, aliphatic alcohols, acids, amides or alkyl phenols with alkylene oxides , especially ethylene oxide alone or with propylene oxide. Specific non-ionic detergent compounds are condensates of C6 to C22 alkyl-phenol / ethylene oxide, generally 5 to 25 EO, that is, 5 to 25 units of ethylene oxide per molecule, and condensation products of C8 aliphatic alcohols to primary or linear, branched or branched C18, generally 5 to 40 EO.

Suitable anionic detergent compounds that can be used are usually water-soluble alkali metal salts of organic sulfates and sulphonates having alkyl radicals containing from about 8 to about 22 carbon atoms, the term "alkyl" being used to include the alkyl part of upper acyl radicals. Examples of suitable synthetic anionic detergent compounds are sodium and potassium alkyl sulfates, especially those obtained by sulfating higher C8 to C18 alcohols, produced, for example, from tallow or coconut oil, C9 to C20 alkyl benzene sulphonates of sodium and potassium, particularly linear C10 to C15 secondary alkyl-sodium benzene sulphonates; and sodium alkyl glyceryl ether sulfates, especially the ethers of the higher alcohols derived from tallow or coconut oil and synthetic alcohols derived from petroleum. Preferred anionic detergent compounds are C11 to C15 alkyl sodium benzene sulphonates and C12 alkyl to C18 sodium sulfates. Also applicable are surfactants such as those described in EP-A-328177 (Unilever), which show desalination resistance, the alkyl polyglycoside surfactants described in EP-A-070074 and alkyl monoglycosides.

Preferred surfactant systems are mixtures of active materials such as anionic and non-ionic detergents, in particular the groups and examples of anionic and non-ionic surfactants indicated in EP-A-346995 (Unilever). A surfactant system which is a mixture of an alkali metal salt of a C8 to C18 primary alcohol sulfate together with ethoxylate 3 to 7 EO of a C12 to C15 primary alcohol is especially preferred.

The non-ionic detergent is preferably present in amounts greater than 10%, for example, 25 to 90% p of the surfactant system. Anionic surfactants may be present, for example, in amounts in the range of about 5% to about 40% p of the surfactant system.

Cationic compound

When the present invention is used as a fabric conditioner, it is necessary to contain a cationic compound.

Most preferred are quaternary ammonium compounds.

It is advantageous that the quaternary ammonium compound is a quaternary ammonium compound having at least one C12 to C22 alkyl chain.

It is preferred that the quaternary ammonium compound has the following formula: wherein R1 is a C12 to C22 alkyl or alkenyl chain; R2, R3 and R4 are independently selected from C1 to C4 alkyl chains and X-is a compatible anion. A preferred compound of this type is the quaternary ammonium compound cetyl-trimethyl-quaternary ammonium bromide.

image 1

A second class of materials to be used in the present invention are the quaternary ammonium derivatives of the above structure in which R1 and R2 are independently selected from a C12 to C22 alkyl or alkenyl chain; R3 and R4 are independently selected from C1 to C4 alkyl chains and X- is a compatible anion.

A detergent composition according to claim 1, wherein the ratio of (ii) cationic material to (iv) anionic surfactant is at least 2: 1.

Other suitable quaternary ammonium compounds are described in EP 0239910 (Procter and Gamble).

It is preferred that the ratio of cationic to non-ionic surfactant is 1: 100 to 50:50, more preferably 1:50 to

20:50

The cationic compound may be present from 0.02% p to 20% p of the total weight of the composition.

Preferably, the cationic compound may be present from 0.05% to 15% p, a range of the most preferred composition is 0.2% to 5% p, and most preferably, the range of the composition is 0.4 % pa 2.5% p of the total weight of the composition.

If the product is a liquid, it is preferred that the level of cationic surfactant is 0.05% p to 10% p of the total weight of the composition. Preferably, the cationic compound may be present from 0.2% p to 5% p and, most preferably, from 0.4% p to 2.5% p of the total weight of the composition.

If the product is a solid, it is preferred that the level of cationic surfactant is 0.05% p to 15% p of the total weight of the composition. A more preferred range of the composition is 0.2% p to 10% p, and the most preferred range of the composition is 0.9% p to 3.0% p of the total weight of the composition.

It is most preferred that the present composition contain less than 0.1% p of any colored inorganic electrolytes such as nickel or cupric sulfate. Most preferably, the present composition is devoid of any colored inorganic electrolytes.

Whitening species

The laundry treatment composition may comprise bleaching species. The bleaching species can be selected, for example, from perborate and percarbonate. These peroxyl species can be further enhanced by the use of an activator, for example, TAED or SNOBS. Alternatively or additionally, a transition metal catalyst with the peroxyl species can be used. A transition metal catalyst may also be used in the absence of peroxyl species in which the bleach is intended to be through atmospheric oxygen, see, for example, WO 02/48301.

Photobleach, including singlet oxygen photobleach, may be used in the laundry treatment composition. A preferred photobleach is vitamin K3.

Contrast agent

The laundry treatment composition comprises a contrast agent (optical brightener). It has been found that the presence of a contrast agent improves dye deposition. Contrast agents are well known and many of these contrast agents are commercially available. Usually, these contrast agents are supplied and used in the form of their alkali metal salts, for example, sodium salts. The total amount of the contrast agent or agents used in the laundry treatment composition is 0.005 to 2% p, more preferably 0.01 to 0.1% p. Preferred contrast agents are: 2- (4-Styryl-3-sulfophenyl) -2H-naphthol [1,2-d] triazole sodium, 4,4'-bis {[(4-anilino-6- (N-methyl) -N-2-hydroxyethyl) amino-1,3,5-triazin-2-yl)] amino} stilbene-2,2'-disulfonate disodium, and 4,4'-bis (2-sulfoestyryl) biphenyl disodium.

Preferably, the laundry treatment composition comprises a perfume. The perfume is preferably in the range of 0.001 to 3% p, most preferably in the range of 0.001 to 3% p, most

5 preferably 0.1 to 1% p. Many suitable examples of perfumes are provided in the CTFA (Cosmetic, Toiletry and Fragance Association) 1992 International Buyers Guide, published by CFTA Publications and OPD 1993 Chemicals Buyers Directory 80th Annual Edition, published by Schnell Publishing Co.

Example

10 65:35 pieces of water-woven polyester-cotton containing 0.5 g / l SDS surfactant and 0.5 g / l NaCl were washed for 30 minutes at room temperature (20 ° C). To this were added varying levels of the Tinopal CBS-X contrast agents (from Ciba Specialty Chemiclas, Basel) and solvent violet 13. Solvent violet 13 was added with vigorous stirring from a 50 ppm ethanol stock solution. . After washing, the

15 clothes were dried and their reflectance spectra were recorded excluding UV light from below 420 nm. The level of solvent violet 13 deposited in the clothing can be conveniently measured through the reflectance at 580 nm.

The results are shown in the following table, which provides the value of K / S at 580 nm. 20 K / S = (1-R) 2 / (2R) and is proportional to the contribution of dye in clothing.

As expected, CBS-X does not significantly alter the baseline value of K / S (580) since UV light is excluded and the molecules do not absorb or emit at this wavelength. 25

ppb SV13 in wash solution

ppm CBS-X in wash solution

0

0.5 1.0 2.0

0

0.0067 0.0064 0.0064 0.0068

200

 0.0151 0.0157 0.0163 0.0174

The adsorption of solvent violet 13 to clothing is clearly observed by the increase in K / S (580). Surprisingly, adsorption increases as the level of CBS-X increases, so there is more coloring in the clothing. This is completely unexpected, since CBS-X is deposited in cotton fibers and solvent violet 13 in the fibers of

30 polyester on clothes. The contrast agenda makes the solvent violet 13 tank more efficient.

Tinopal CBS-X is a di-styryl biphenyl compound of the following structure:

image 1

Claims (10)

1. A domestic method to treat a textile garment, including the method the following stages: 5 (i) adding a laundry treatment composition comprising between 0.0000001% and less than 0.00005% p of a hydrophobic dye, 0.005 to 2% p of a contrast agent selected from: 2- (4- sodium styryl-3-sulfophenyl) 2H-naphthol [1,2-d] triazole, 4,4'-bis {[(4-anilino-6- (N-methyl-N-2-hydroxyethyl) amino-1, 3,5-triazin-2-yl)] amino} stilbene2,2'-disulfonate disodium, 4,4'-bis {[(4-anilino-6-morpholino-1,3,5-triazin-2-yl )] amino} stilbene-2,2'-disulfanate disodium and 4,4'-bis (2-sulfoestyryl) biphenyl disodium, and between 2 and 60% p of a surfactant, having the dye 10 hydrophobic an anthraquinone structure, to an aqueous medium, to form a darkening medium; (ii) treat the textile garment with the darkening medium; (iii) rinse the textile material with an aqueous medium; and 15 (iv) dry the treated textile. 2. A method according to claim 1, wherein the hydrophobic dye has the following structure of anthraquinone (I): 20 image 1 wherein R1, R4, R5 and R8 are independently selected from the groups consisting of -H, -OH, -NH2, NHR9 and -NO2, so that a maximum of only one -NO2 group and a maximum of two -H as 25 substituents R1, R4, R5 and R8; wherein R9 is a branched or linear C1-C7 alkyl chain or an aryl group or substituted aryl groups; R2, R3, R6 and R7 can be selected from -H, -F, -Br, -Cl, -SO3-aryl or -NO2, and -OR10 in which R10 is selected from the group consisting of C1-C7 alkyl branched or linear or aryl. 3. A method according to claim 2, wherein the branched or linear alkyl chain of R9 and R10 has less than six carbon atoms and does not have an OH or OMe substituent. A method according to claim 2, wherein R1, R4, R5 and R8 are independently selected from the groups consisting of -H, -OH, NH2 and -NO2 and R2, R3, R6 and R7 are select between -H, F, Br, Cl or NO2 and -O-aryl. 5. A method according to any one of claims 2 to 4, wherein the aryl is an optionally substituted phenyl. 6. A method according to any one of claims 2 to 5, wherein at least one of R1, R4, R5 and R8 is -OH and one of R1, R4, R5 and R8 is selected from -NH2 and - NHR9. A method according to claim 2, wherein R2, R3, R5, R6, R7 and R8 are -H, R1 = -OH, R4 = -NHR9 or -NH2. 8. A method according to claim 2, wherein R5, R6, R7 and R8 = -H, R1 = R4 = -NH2, R2 = R3 = -O aryl or -Cl. fifty 9. A method according to claim 1, wherein the dye is selected from the group consisting of: solvent violet 13, disperse blue 56, disperse violet 26 and disperse violet 28. 10. A method according to claim 9, wherein the dye is solvent violet 13. 55

eleven.

 A method according to any of the preceding claims, wherein the dye provides a blue or violet darkening when deposited in white polyester.

12.

 A method according to any of the preceding claims, wherein the composition comprises between 0.0001 and 0.1% p of one or more other dyes selected from dye dyes substantive for cotton from the group consisting of: dye Hydrolyzed reagent, acid dye and direct dye.