WO2010142503A1 - Cationic dye polymers - Google Patents

Cationic dye polymers Download PDF

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Publication number
WO2010142503A1
WO2010142503A1 PCT/EP2010/056336 EP2010056336W WO2010142503A1 WO 2010142503 A1 WO2010142503 A1 WO 2010142503A1 EP 2010056336 W EP2010056336 W EP 2010056336W WO 2010142503 A1 WO2010142503 A1 WO 2010142503A1
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Prior art keywords
dye
detergent composition
composition according
selected
ch
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PCT/EP2010/056336
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French (fr)
Inventor
Stephen Norman Batchelor
Jayne Michelle Bird
Wei Chen
Qingsheng Tao
Jinfang Wang
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Unilever Plc
Unilever N.V.
Hindustan Unilever Limited
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Priority to EP09162563 priority Critical
Priority to EP09162563.2 priority
Application filed by Unilever Plc, Unilever N.V., Hindustan Unilever Limited filed Critical Unilever Plc
Publication of WO2010142503A1 publication Critical patent/WO2010142503A1/en

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Classifications

    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/40Dyes ; Pigments
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09BORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B69/00Dyes not provided for by a single group of this subclass
    • C09B69/10Polymeric dyes; Reaction products of dyes with monomers or with macromolecular compounds
    • C09B69/103Polymeric dyes; Reaction products of dyes with monomers or with macromolecular compounds containing a diaryl- or triarylmethane dye
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09BORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B69/00Dyes not provided for by a single group of this subclass
    • C09B69/10Polymeric dyes; Reaction products of dyes with monomers or with macromolecular compounds
    • C09B69/106Polymeric dyes; Reaction products of dyes with monomers or with macromolecular compounds containing an azo dye
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09BORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B69/00Dyes not provided for by a single group of this subclass
    • C09B69/10Polymeric dyes; Reaction products of dyes with monomers or with macromolecular compounds
    • C09B69/109Polymeric dyes; Reaction products of dyes with monomers or with macromolecular compounds containing other specific dyes
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06LDRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
    • D06L4/00Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
    • D06L4/60Optical bleaching or brightening
    • D06L4/614Optical bleaching or brightening in aqueous solvents
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06PDYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS, OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/0052Dyeing with polymeric dyes

Abstract

The present invention provides a laundry treatment composition comprising a cationic dye-polymer.

Description

CATIONIC DYE POLYMERS

FIELD OF INVENTION

The present invention relates to the delivery of dyes polymers to fabrics.

BACKGROUND OF THE INVENTION

WO2005/003274, to Unilever, discloses that shading dyes may be included in detergent formulations to enhance the whiteness of garments.

WO2006/055787 and WO2009/040731, to Proctor and Gamble, discloses anionic reactive dyes bound to polysaccharide polymers for use in laundry formulations. The reactive dyes used are negatively charged. The shading benefit is found predominately on cellulosic garments.

WO2008/009579 (Ciba) discloses polymer chains with pendant cationic charged dyes for use in hair dyeing.

WO2006/004876 discloses the use on non-polymeric cationic dyes (basic dyes) for shading cotton fabrics.

EP 0128619 discloses water insoluble polystyrene based polymer dyes for providing colour to a hypochlorite composition, the dyes are resistant to bleaching in a hypochlorite solution. The dyes disclosed are anionic or neutral in an aqueous solution at a pH in the range from 7 to 11. The reason the dyes are not bleached is because they are insoluble in the medium.

WO 2005/068596 discloses polymeric violet colourents in which an unidentified proprietary dye is used in the experimental .

WO 2005/003274 discloses that cationic dyes of the classes basic blue and basic violet may be used to shade cotton from laundry detergent compositions.

SUMMARY OF THE INVENTION

Dye-polymer of the current invention provide shading to a variety of fabrics whilst providing soil removal benefits.

Dyes are coloured molecules having high extinction coefficients in the visible range. Molar extinction coefficients is a standard scientific way to quantify the absorption of light by a molecule.

In one aspect the present invention provides a detergent composition comprising from 2 to 70 wt % of a surfactant together with from 0.0001 to 50 wt% of a dye-polymer of molecular weight of at least 500, wherein the dye-polymer is obtainable by polymerisation of: (a) a dye monomer, the dye monomer an alkene covalently bound to a cationic charged dye, the dye monomer having a molar extinction coefficient at a wavelength in the range 400 to 700nm of at least 1000 mol"1 L cm"1, preferably greater than 4000 mol"1 L cm"1, and

(b) one or more further alkene comonomer (s) , the alkene monomer (s) having molar extinction coefficient at a wavelength in the range 400 to 700nm that is less than 100 mol"1 L cm"1, preferably less than 10 mol"1 L cm"1.

In another aspect the present invention provides a domestic method of treating a textile, the method comprising the steps of:

(i) treating a textile with an aqueous solution of the dye-polymer, the aqueous solution comprising from 10 ppb to 100 ppm of the dye-polymer; and, from 0.0 g/L to 3 g/L of a surfactant; (ϋ) optionally rinsing; and, (iii) drying the textile.

DETAILED DESCRIPTION OF THE INVENTION

The detergent composition as described herein is most preferably a granular detergent composition.

DYE MONOMER

The dye monomer is an organic molecule which when dissolved in an organic solvent has a molar absorption extinction coefficient of 1000 mol"1 L cm"1, preferably greater than 4000 mol"1 L cm"1, most preferably greater than 15 000 mol"1 L cm"1, at a wavelength in the range 400-700nm, preferably 500- 650nm, most preferably 540-600nm. Molar absorption coefficients are preferably measured in an organic solvent, preferably propan-2-ol, using a 1, 5 or 10cm cell.

The dye monomer is cationically charged in aqueous solution at a pH in the range from 7 to 11. The dye monomer contains at least one quaternary amine group.

Most preferably the cationic charge is delocalised across the aromatic rings of the dye.

Preferably, the dye monomer is of the form:

Figure imgf000005_0001
wherein Y is an organic bridging group covalently connecting a dye to the alkene moiety of the dye monomer and Ri is selected from: alkyl; aryl; benzyl; halogen; ester; acid amide; and, CN.

Preferably, the organic bridging group is selected from: - CONR4-; -NR4CO-; -COOR4- ; -NR4- ; -O- ; -S-; -SO2-; -SO2NR4-; -

N(COR4)-; and -N(SO2R4)-; wherein R4 is selected from: H; Cl-

C6 branched or linear alkyl; phenyl and benzyl groups; wherein R4 has 0 to 1 spacing units selected from: -0-; -S-;

-SO2-; -C(O)O-; -OC(O)-; and an amine. Most preferably, the organic bridging group is -NR4CO- or -CONR4-. Preferably, R4 is selected: from: H and Me. Preferably, the Y group is bound directly to a carbon atom of an aromatic ring of the dye.

Preferably, Ri is selected from: H; Me; Et; Pr; CO2C1-C4 branched and linear alkyl chains; phenyl; benzyl; CN; Cl; and, F. More preferably, Ri is selected from: H; and, Me.

Preferably, the dye is an organic dye selected from the following chromophore classes: anthraquinone, azo, azine, triphenodioxazine, triphenyl methane, xanthene and phthalocyanin . Most preferred chromophore classes are mono- azo and azine. Of the mono-azo dye class the following are preferred, thiazoliums, isothiazoliums, pyridine and pyridazine dyes. Preferably, the azo group is covalently bound to a benzene ring and para to an -NHCOC(Ri)=CH2 group.

A preferred class per se are azine dyes. Preferred azine dyes are selected from:

Figure imgf000006_0001

Figure imgf000007_0001

wherein R7 and Rs are independently selected from H, C1-C8 branched or linear alkyl, C1-C8; branched or linear alkyl- NHCOC(Ri)=CH2, phenyl, benzyl, -COC(Ri)=CH2; and R7 and R8 may be joined to form a cyclic alkyl amine group, and when R7 and Re do not contain a branched or linear alkyl-NHCOC (Ri) =CH2 or -COC(Ri)=CH2 group then a -Y-C(Ri)=CH2 is bound to the A or B ring. The azine dye may be further substituted with uncharged organic groups.

Preferably, the dye-monomer is selected from: Basic Violet 2; Basic Violet 5; Basic Violet 12; Basic Violet 14; Basic Violet 8; Basic Blue 12; Basic Blue 16; Basic Blue 17; Basic Blue 47; and, Basic Blue 99, wherein the one -NH2 of the dye is converted to -NH-C(O)-CH=CH2 or -NH-C(O)-C(Me)=CH2.

The dye monomer may be further substituted by uncharged organic groups having a total molecular weight of less than 400. Preferred, uncharged organic groups are selected from: NHCOCH3; CH3; C2H5; CH3O; C2H5O; amine; Cl; F; Br; I; NO2; CH3SO2; and, CN. Most preferably the dye monomer is of the form dye-NH-C (O) CH=CH2 or dye-NH-C (O) -C (Me)=CH2. Most preferably the dye monomer is formed by reaction of a dye containing an NH2 group with acryloyl chloride (2-propenoyl chloride) or methacryloyl chloride (2-methylprop-2-enoyl chloride) .

An alternative preferred route to form a dye monomer is via reaction of the amin groups of a dye with an alkene bearing a pendant epoxide group. For example:

dye—NH2

Figure imgf000008_0001

Preferred dye monomers include:

Figure imgf000009_0001
ALKENE COMONOMERS

The alkene co-monomer may be selected from any suitable alkene . The comonomer i s preferably of the form :

Figure imgf000010_0001

wherein R2 and R3 are independently selected from: H, C1-C8 branched, cyclic and linear alkyl chains, C(O)OH, CO2CI-CI8 branched and linear alkyl chains, -C(O)N (Cl-C18)2; -C (O)N(C1-C18)H; -C(0)NH2; heteroaromatic, phenyl, benzyl, polyether, cyano, Cl and F. Where C1-C18 is specified a preferred range is Cl to C4.

The R2 and R3 of the comonomer may be further substituted by charged and uncharged organic groups having a total molecular weight of less than 400. Preferred uncharged organic groups are selected from: NHCOCH3, CH3, C2H5, OH, CH3O, C2H5O, amine, Cl, F, Br, I, NO2, CH3SO2, and CN.

The phenyl, benzyl and alkyl chains may be substituted by further organic groups selected from: OH; F; Cl; alkoxy (preferably OCH3) , S03 ~, COOH, amine, quaternary amine, acid amide and ester. When phenyl or benzyl groups are present, the aromatic is not substituted by OH.

Where the alkyl has not been specified, Cl to C4 branched or linear is preferred. Examples of suitable co-monomers include. Examples of suitable co-monomers include. Preferred co-monomer are indicated.

Figure imgf000011_0001
Figure imgf000012_0001
Figure imgf000013_0001
1 -sulfonate

1 -propanesulfonic acid

Figure imgf000014_0001

Mixtures of co-monomer may be used. It is preferred that the >50wt%, more preferably >80wt%, of the co-monomers are selected from co-monomer that have a molecular weight of less than 300 and contains an amine, amide, OH, OCH3 SO3 ' or COO" group. Most preferably, the co-monomers contain an amine or OCH3 group.

Most preferably >50wt%, preferably >80wt%, of the comonomers are acrylates with pendant tertiary amine groups, most preferably selected from DMAEMA and DEAEMA.

Additional comonomer may be added to the polymer which are covalently bound to radical photobleaches such as vitamin K3 or 2-ethyl anthraquinone . Other organic active ingredients such as sunscreens, antifungal agents, bleach catalysts, antimicrobial, antiwrinkle may also be covalently linked to the polymer. Examples of such ingredients are 5-chloro-2- (2, 4-dichlorophenoxy) phenol, 6-acetoxy-2, 4-dimethyl-m- dioxane, para-aminobenzoic acid, diethanolamine-p-methoxy cinnamate and oxybenzone. Most preferably the ingredient contains an NH2 group and the monomer is created in an analogous manner to the dye monomer. These are preferably present at a lower level than the dye.

DYE POLYMER

Preferably, the dye polymer is blue or violet in colour. Preferably the dye polymer gives a blue or violet colour to the cloth with a hue angle of 240 to 345, more preferably 265 to 330, most preferably 270 to 300. The cloth used to determine the hue angle is white bleached non-mercerised woven cotton sheeting.

The polymer is obtainable by co-polymerisation of the dye monomer with suitable unsaturated organic co-monomers. Preferably the polymer contains 0.1 to 30 Molar% dye monomers units, more preferably 1 to 15 Molar% dye monomers units, most preferably 2 to 10 Molar%.

Preferably the polymer contains less than 20 Molar%, more preferably less than 5 Molar% of co-monomers bearing COOH or Sθ3~ groups .

The monomers within the polymer may be arranged in any suitable manner. For example as Alternating copolymers possess regularly alternating monomer residues; Periodic copolymers have monomer residue types arranged in a repeating sequence; Random copolymers have a random sequence of monomer residue types; Statistical copolymers have monomer residues arranged according to a known statistical rule; Block copolymers have two or more homopolymer subunits linked by covalent bonds. Most preferably the polymer is a random copolymer. The polymer should have a molecular weight 500 and greater, preferably 2000 and greater, preferably 5000 and greater. In this context the molecular weight is the number average molecular weight. This is the ordinary arithmetic mean of the molecular weights of the individual macromolecules . It is determined by measuring the molecular weight of j polymer molecules, summing the weights, and dividing by j. Molecular weights are determined by Gel Permeations Chromatography.

It is preferred that the dye-polymer is soluble in surfactant solution. Specifically that at lg/L sodium dodecyl sulfate aqueous solution at pH=7 the dye polymer has a solubility of greater than lmg/L, preferably greater than lOmg/L. Water solubility is enhanced by the presence of hydroxy, amino and charged groups in the polymer, preferably anionic charged groups. Preferably the polymer is of the form:

Figure imgf000017_0001
wherein X = Y-Dye.

Preferably, a is greater than b (a>b) . More preferably the ratio a:b is from 99.9:0.1 to 70:30.

It is preferred that the dye-polymer has a number average molecular weight in the range from 500 to 500000, preferably from 2000 to 100000, more preferably 5000 to 50000.

For addition to a granular formulation the polymer dye may be added to the slurry to be spray dried or preferably added via post-dosed granules.

In a preferred embodiment the polymer dye powder obtained from the polymer dye synthesis is mixed with a Na2SO4 or NaCl or pre-prepared granular base or full detergent formulation to give a 0.1 to 20 polymer dye wt% mixture. This dry mix is then mixed into the granular formulation. The polymer dye powder is preferably formed by drying a liquid slurry or solution of the dye, for example by vacuum drying, freeze drying, drying in drum dryers, Spin Flash ® (Anhydro) , but most preferably by spray drying. The polymer dye powder may be ground before, during or after the making of the slurry. This grinding is preferably accomplished in mills, such as for example ball, swing, bead or sand mills, or in kneaders .

Other ingredients such as dispersants or alkali metal salts may be added to the liquid slurry. The polymer dye powder preferably contains 20 to 100 wt% of the dye.

Preferably, the polymer dye powder has an average particle size, APS, from 0.1 to 300 microns, preferably 10 to 100 microns. Preferably this is as measured by a laser diffraction particle size analyser, preferably a Malvern HP with 100 mm lens.

SURFACTANT

The composition comprises between 2 to 70 wt percent of a surfactant, most preferably 10 to 30 wt %. In general, the nonionic and anionic surfactants of the surfactant system may be chosen from the surfactants described "Surface Active Agents" Vol. 1, by Schwartz & Perry, Interscience 1949, Vol. 2 by Schwartz, Perry & Berch, Interscience 1958, in the current edition of "McCutcheon ' s Emulsifiers and Detergents" published by Manufacturing Confectioners Company or in "Tenside-Taschenbuch" , H. Stache, 2nd Edn., Carl Hauser Verlag, 1981. Preferably the surfactants used are saturated.

Suitable nonionic detergent compounds which may 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 - I i

with alkylene oxides, especially ethylene oxide either alone or with propylene oxide. Specific nonionic detergent compounds are Ce to C22 alkyl phenol-ethylene oxide condensates, generally 5 to 25 EO, i.e. 5 to 25 units of ethylene oxide per molecule, and the condensation products of aliphatic Cs to Cis primary or secondary linear or branched alcohols with ethylene oxide, generally 5 to 40 EO.

Suitable anionic detergent compounds which may be used are usually water-soluble alkali metal salts of organic sulphates and sulphonates having alkyl radicals containing from about 8 to about 22 carbon atoms, the term alkyl being used to include the alkyl portion of higher acyl radicals. Examples of suitable synthetic anionic detergent compounds are sodium and potassium alkyl sulphates, especially those obtained by sulphating higher Cs to Cis alcohols, produced for example from tallow or coconut oil, sodium and potassium alkyl Cg to C20 benzene sulphonates, particularly sodium linear secondary alkyl Cio to Ci5 benzene sulphonates; and sodium alkyl glyceryl ether sulphates, especially those ethers of the higher alcohols derived from tallow or coconut oil and synthetic alcohols derived from petroleum. The preferred anionic detergent compounds are sodium Cu to Ci5 alkyl benzene sulphonates and sodium C12 to Cis alkyl sulphates. Also applicable are surfactants such as those described in EP-A-328 177 (Unilever), which shows resistance to salting-out, the alkyl polyglycoside surfactants described in EP-A-070 074, and alkyl monoglycosides .

Preferred surfactant systems are mixtures of anionic with nonionic detergent active materials, in particular the groups and examples of anionic and nonionic surfactants pointed out in EP-A-346 995 (Unilever). Especially preferred is surfactant system that is a mixture of an alkali metal salt of a Ci6 to Cis primary alcohol sulphate together with a Ci2 to Ci5 primary alcohol 3 to 7 EO ethoxylate.

The nonionic detergent is preferably present in amounts greater than 10%, e.g. 25 to 90 wt % of the surfactant system. Anionic surfactants can be present for example in amounts in the range from about 5% to about 40 wt % of the surfactant system.

In another aspect which is also preferred the surfactant may be a cationic such that the formulation is a fabric conditioner.

CATIONIC COMPOUND

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

Most preferred are quaternary ammonium compounds.

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

It is preferred if the quaternary ammonium compound has the following formula: R2

I +

R1—N-R3 X I R4 in which R1 is a C12 to C22 alkyl or alkenyl chain; R2, R3 and R4 are independently selected from Ci 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.

A second class of materials for use with the present invention are the quaternary ammonium of the above structure in which R1 and R2 are independently selected from C12 to C22 alkyl or alkenyl chain; R3 and R4 are independently selected from Ci to C4 alkyl chains and X~ is a compatible anion.

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

Other suitable quaternary ammonium compounds are disclosed in EP 0 239 910 (Proctor and Gamble) .

It is preferred if the ratio of cationic to nonionic surfactant is from 1:100 to 50:50, more preferably 1:50 to 20:50.

The cationic compound may be present from 1.5 wt % to 50 wt % of the total weight of the composition. Preferably the cationic compound may be present from 2 wt % to 25 wt %, a more preferred composition range is from 5 wt % to 20 wt %. The softening material is preferably present in an amount of from 2 to 60% by weight of the total composition, more preferably from 2 to 40%, most preferably from 3 to 30% by weight .

The composition optionally comprises a silicone.

BUILDERS OR COMPLEXING AGENTS

Builder materials may be selected from 1) calcium sequestrant materials, 2) precipitating materials, 3) calcium ion-exchange materials and 4) mixtures thereof.

Examples of calcium sequestrant builder materials include alkali metal polyphosphates, such as sodium tripolyphosphate and organic sequestrants, such as ethylene diamine tetra- acetic acid.

Examples of precipitating builder materials include sodium orthophosphate and sodium carbonate.

Examples of calcium ion-exchange builder materials include the various types of water-insoluble crystalline or amorphous aluminosilicates, of which zeolites are the best known representatives, e.g. zeolite A, zeolite B (also known as zeolite P) , zeolite C, zeolite X, zeolite Y and also the zeolite P-type as described in EP-A-O, 384, 070.

The composition may also contain 0-65 % of a builder or complexing agent such as ethylenediaminetetraacetic acid, diethylenetriamine-pentaacetic acid, alkyl- or alkenylsuccinic acid, nitrilotriacetic acid or the other builders mentioned below. Many builders are also bleach- stabilising agents by virtue of their ability to complex metal ions.

Zeolite and carbonate (carbonate (including bicarbonate and sesquicarbonate) are preferred builders.

The composition may contain as builder a crystalline aluminosilicate, preferably an alkali metal aluminosilicate, more preferably a sodium aluminosilicate. This is typically present at a level of less than 15%w. Aluminosilicates are materials having the general formula:

0.8-1.5 M2O. Al2O3. 0.8-6 SiO2

where M is a monovalent cation, preferably sodium. These materials contain some bound water and are required to have a calcium ion exchange capacity of at least 50 mg CaO/g. The preferred sodium aluminosilicates contain 1.5-3.5 SiO2 units in the formula above. They can be prepared readily by reaction between sodium silicate and sodium aluminate, as amply described in the literature. The ratio of surfactants to alumuminosilicate (where present) is preferably greater than 5:2, more preferably greater than 3:1.

Alternatively, or additionally to the aluminosilicate builders, phosphate builders may be used. In this art the term λphosphate' embraces diphosphate, triphosphate, and phosphonate species. Other forms of builder include silicates, such as soluble silicates, metasilicates, layered silicates (e.g. SKS-6 from Hoechst) .

Preferably the laundry detergent formulation is a non- phosphate built laundry detergent formulation, i.e., contains less than 1 wt% of phosphate.

FLUORESCENT AGENT

The composition preferably comprises a fluorescent agent

(optical brightener) . Fluorescent agents are well known and many such fluorescent agents are available commercially. Usually, these fluorescent agents are supplied and used in the form of their alkali metal salts, for example, the sodium salts. The total amount of the fluorescent agent or agents used in the composition is generally from 0.005 to 2 wt %, more preferably 0.01 to 0.1 wt %. Preferred classes of fluorescer are: Di-styryl biphenyl compounds, e.g. Tinopal (Trade Mark) CBS-X, Di-amine stilbene di-sulphonic acid compounds, e.g. Tinopal DMS pure Xtra and Blankophor (Trade Mark) HRH, and Pyrazoline compounds, e.g. Blankophor SN. Preferred fluorescers are: sodium 2 (4-styryl-3- sulfophenyl) -2H-napthol [ 1, 2-d] triazole, disodium 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-l , 3, 5-triazin-2-yl) ] amino } stilbene-2-2' disulfonate, and disodium 4, 4 '-bis (2- sulfostyryl) biphenyl .

It is preferred that the aqueous solution used in the method has a fluorescer present. When a fluorescer is present in the aqueous solution used in the method it is preferably in the range from 0.0001 g/1 to 0.1 g/1, preferably 0.001 to 0.02 g/1.

PERFUME

Preferably the composition comprises a perfume. The perfume is preferably in the range from 0.001 to 3 wt %, most preferably 0.1 to 1 wt %. Many suitable examples of perfumes are provided in the CTFA (Cosmetic, Toiletry and Fragrance Association) 1992 International Buyers Guide, published by CFTA Publications and OPD 1993 Chemicals Buyers Directory 80th Annual Edition, published by Schnell Publishing Co.

It is commonplace for a plurality of perfume components to be present in a formulation. In the compositions of the present invention it is envisaged that there will be four or more, preferably five or more, more preferably six or more or even seven or more different perfume components.

In perfume mixtures preferably 15 to 25 wt% are top notes. Top notes are defined by Poucher (Journal of the Society of Cosmetic Chemists 6(2): 80 [1955]). Preferred top-notes are selected from citrus oils, linalool, linalyl acetate, lavender, dihydromyrcenol, rose oxide and cis-3-hexanol . Perfume and top note may be used to cue the whiteness benefit of the invention.

It is preferred that the laundry treatment composition does not contain a peroxygen bleach, e.g., sodium percarbonate, sodium perborate, and peracid. POLYMERS

The composition may comprise one or more polymers. Examples are carboxymethylcellulose, poly (ethylene glycol) , poly (vinyl alcohol), polycarboxylates such as polyacrylates, maleic/acrylic acid copolymers and lauryl methacrylate/acrylic acid copolymers.

Polymers present to prevent dye deposition, for example poly (vinylpyrrolidone) , poly (vinylpyridine-N-oxide) , and poly (vinylimidazole) , are preferably absent from the formulation .

ENZYMES

The laundry treatment composition may contain an enzyme. Preferred enzymes are disclosed in WO 2007/087243 and WO 2007/087257.

Examples

Example 1 Polymer Synthesis The dye monomer shown in the scheme below was prepared by the reaction of methylene violet RAX and acryloyl chloride in the presence of sodium dicarbonate.

Dye polymers were created via radical polymerisation of the dye monomer with dimethyl amino ethyl methacrylate (DMAEMA) according to the reaction scheme:

Figure imgf000027_0001

Example 2 UV-VIS spectroscopy

The UV-Vis spectra of the dye polymers of example 1 were recorded in demineralised water at lg/L dye polymer. The UV- Vis spectra of the dye polymers of example 3 were recorded in demineralised water at lg/L dye polymer and containing lg/L of linear alkly benzene sulphonate surfactant (LAS) . The results are given in the tables below and an identifying code given to each polymer.

Figure imgf000028_0001

* measured at 50% dilution

Example 3 : Dye deposition experiments

Knitted white polyester (microfiber) , knitted nylon-elastane (80:20) and white woven non-mercerised cotton fabrics were used together in 4g/L of a detergent which contained 15% Linear Alkyl benzene sulfonate (LAS) surfactant, 30% Na2CO3, 40% NaCl, remainder minors included calcite and fluorescer and moisture. Washes were conducted in 6° French Hard water at room temperature with a liquor to cloth ratio of 30:1, for 30 minutes. This was then repeated once more to accomplish 2 washes in total. Following the washes the cloths were rinsed twice in water, dried, their reflectance spectrum measured on a reflectometer and the colour expressed as CIE L* a* b* values (UV-excluded) .

The experiment was repeated with the addition of the dye polymers of example 2. The polymers were added to give 5ppm in the wash solution. The deposition of the dye-polymers to the fabrics was expressed as the Δb value such that Δb = b (control) -b (dye polymer) +ve values indicate a blueing of the fabric, due to dye- polymer deposition.

Dye-polymer Δb 2nd wash

Cotton Nylon elastane polyester

C13 0.1 0. 1 0 2

C14 0.6 0. 6 0 5

C15 1.4 0. 8 0 5

C16 2.1 1. 2 0 8

The dye-polymers deposit to nylon-elastane, cotton and polyester fabrics.

An added advantage is that the dye-polymer also facilitates soil removal and alter fabric feel.

Example 4 : Soil Removal

Knitted white polyester (microfiber) , white woven non- mercerised cotton fabrics and a sebum stain monitor [WFK 10 D (Cotton) . (Supplied by WFK-Testgewebe GmbH, Adlerstr. 42, D-4150)] were washed together in 4g/L of a detergent which contained 15% Linear Alkyl benzene sulfonate (LAS) surfactant, 30% Na2CC>3, 40% NaCl, remainder minors included calcite and fluorescer and moisture. Washes were conducted in 6° French Hard water at room temperature with a liquor to cloth ratio of 30:1, for 30 minutes. Following the washes the cloths were rinsed twice in water, dried, their reflectance spectrum measured on a reflectometer (UV- excluded) . The experiment was repeated with the addition of lppm in the wash solution of dye polymer C15 of example 3.

The soil removal on the WFKlOD cloth was measured as the change in %Reflectance at 460nm before and after washing: ΔR46o = R460 (after wash) - R46o (before wash) .

The experiments were repeated 4 times and the average values of AR46O calculated. The results were

AR46O (control) = 5.1 ΔR46o (C15) = 5.8

The increase in ΔR46o for C15 cannot be due to dye deposition. Colouring of the cloth by the dye will reduce ΔR46o as the dye reduces the base reflectance due to absorption of light. The dye polymer C15 increases the soil removal.

Exemplary Base Powder Formulations A, B, C and D

Figure imgf000031_0001

Disperse violet 28 is Dianix Brill Violet B, ex DyStar,as received. Exemplary Base Liquid Formulations A, B, C and D

Figure imgf000032_0001

For both powder and liquids formulations, enzyme levels are given as percent pure enzyme. NI (7EO) refers to R- (OCH2CH2) nOH, where R is an alkyl chain of C12 to C15, and n is 7. NaLAS is linear alkyl benzene sulphonate (LAS) and (SLES(3EO)) is Ci2-Ci8 alkyl polyethoxylate (3.0) sulphate. Formulations were made using Lipex as the lipase, Savinase and Polarzyme and the protease, Carezyme as the cellulose and Stainzyme as the amylase.

Claims

We claim:
1. A detergent composition comprising from 2 to 70 wt % of a surfactant together with from 0.0001 to 50 wt% of a dye- polymer of molecular weight of at least 500, wherein the dye-polymer is obtainable by polymerisation of:
(a) a dye monomer, the dye monomer an alkene covalently bound to a cationic charged dye, the dye monomer having a molar extinction coefficient at a wavelength in the range 400 to 700nm of at least 1000 mol"1 L cm"1, preferably greater than 4000 mol"1 L cm"1, and
(b) one or more further alkene comonomer (s) , the alkene monomer (s) having molar extinction coefficient at a wavelength in the range 400 to 700nm that is less than 100 mol"1 L cm"1, preferably less than 10 mol"1 L cm"1, wherein the dye monomer is cationically charged in aqueous solution at a pH in the range from 7 to 11.
2. A detergent composition according to claim 1, wherein the dye monomer is of the form:
H2C=(^
Y—Dye, wherein Y is an organic bridging group covalently connecting a dye to the alkene moiety of the dye monomer and Ri is selected from: alkyl; aryl; benzyl; halogen; ester; acid amide; and, CN.
3. A detergent composition according to claim 2, wherein the organic bridging group, Y, is selected from: -CONR4-; - NR4CO-; -COOR4-Z-NR4-; -0-; -S-; -SO2-; -SO2NR4-; -N(COR4)-; and -N(SO2R4)-; wherein R4 is selected from: H; C1-C6 branched or linear alkyl; phenyl and benzyl groups; wherein R4 has 0 to 1 spacing units selected from: -0-; -S-; -SO2-; - C(O)O-; -OC(O)-; and an amine.
4. A detergent composition according to claim 2, wherein the organic bridging group is -NR4CO- or -CONR4-.
5. A detergent composition according to any one of claims 3 to 4, wherein R4 is selected: from: H and Me.
6. A detergent composition according to any one of claims 2 to 5, wherein the Y group is bound directly to a carbon atom of an aromatic ring of the dye.
7. A detergent composition according to any one of the preceding claims, wherein the dye is an organic dye selected from the following chromophore classes: anthraquinone, azo, azine, triphenodioxazine, triphenyl methane, xanthene and phthalocyanin .
8. A detergent composition according to claim 7, wherein the organic dye is selected from the following chromophore classes: mono-azo and azine.
9. A detergent composition according to any one of claims 2 to 8, wherein R1 is selected from: H; Me; Et; Pr; CO2C1-C4 branched and linear alkyl chains; phenyl; benzyl; CN; Cl; and, F.
10. A detergent composition according to claim 9, wherein Ri is selected from: H; and, Me.
11. A detergent composition according to any one of the preceding claims, wherein the dye-monomer is selected from: Basic Violet 2; Basic Violet 5; Basic Violet 12; Basic Violet 14; Basic Violet 8; Basic Blue 12; Basic Blue 16; Basic Blue 17; Basic Blue 47; and, Basic Blue 99, wherein the one -NH2 of the dye is converted to -NH-C (O) -CH=CH2 or - NH-C (O) -C (Me)=CH2.
12. A detergent composition according to claim 8, wherein the mono-azo dye is selected from the group consisting of: thiazoliums, isothiazoliums, pyridine and pyridazine dyes.
13. A detergent composition according to claim 12, wherein the azo group is covalently bound to a benzene ring and para to an -NHCOC(Rl)=CH2 group.
14. A detergent composition according to claim 8, wherein the dye is an azine dye.
15. A detergent composition according to claim 14, wherein the azine dye is selected from:
Figure imgf000036_0001
wherein R7 and Rs are independently selected from H, C1-C8 branched or linear alkyl, C1-C8; branched or linear alkyl- NHCOC(Ri)=CH2, phenyl, benzyl, -COC(Ri)=CH2; and R7 and R8 may be joined to form a cyclic alkyl amine group, and when R7 and Rs do not contain a branched or linear alkyl-NHCOC (Ri) =CH2 or -COC(Ri)=CH2 group then a -Y-C(Ri)=CH2 is bound to the A or B ring.
16. A detergent composition according to any preceding claim, wherein the dye monomer is further substituted by uncharged organic groups having a total molecular weight of less than 400.
17. A detergent composition according to claim 16, wherein the uncharged organic groups are selected from: NHCOCH3; CH3; C2H5; CH3O; C2H5O; amine; Cl; F; Br; I; NO2; CH3SO2; and, CN.
18. A detergent composition according to any one of the preceding claims, wherein the comonomer is selected from:
Figure imgf000037_0001
wherein R2 and R3 are independently selected from:
H, C1-C8 branched, cyclic and linear alkyl chains, C(O)OH, CO2CI-CI8 branched and linear alkyl chains, -C(O)N (C1-C18) 2; -C (O)N(C1-C18)H; -C(0)NH2; heteroaromatic, phenyl, benzyl, polyether, cyano, Cl and F.
19. A detergent composition according to claim 18, wherein R2 and R3 of the comonomer is further substituted by groups selected from: charged; and, uncharged organic, the further groups having a total molecular weight of less than 400.
20. A detergent composition according to any one of the preceding claims, wherein detergent composition comprises a fluorescent agent.
21. A domestic method of treating a textile, the method comprising the steps of:
(i) treating a textile with an aqueous solution of the dye-polymer as defined in any one of claims 1 to 19, the aqueous solution comprising from 10 ppb to 100 ppm of the dye-polymer; and, from 0.0 g/L to 3 g/L of a surfactant; (ii) optionally rinsing; and, (iii) drying the textile.
22. A domestic method of treating a textile according to claim 21.
23. , wherein the aqueous solution comprises from 0.3 to 2 g/L of a surfactant.
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