Title of Invention

LAUNDRY TREATMENT COMPOSITIONS

Abstract The present invention provides a treatment composition comprising a hydrophobic dye and a second dye, selected from hydrolysed reactive dyes, acid dyes and direct dyes; and a surfactant.
Full Text C4404/C
FORM - 2
THE PATENTS ACT, 1970
(39 of 1970)
&
The Patents Rules, 2003
COMPLETE SPECIFICATION
(See Section 10 and Rule 13)
LAUNDRY TREATMENT COMPOSITIONS
HINDUSTAN LEVER LIMITED, a company incorporated under the Indian Companies Act, 1913 and having its registered office at Hindustan Lever House, 165/166, Backbay Reclamation, Mumbai -400 020, Maharashtra, India
The following specification particularly describes the invention and the manner in which it is to be performed

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LAUNDRY TREATMENT COMPOSITIONS
TECHNICAL FIELD
The present invention relates to laundry treatment
5 compositions that comprise a dye.
BACKGROUND OF THE INVENTION
Garments comprising polyester fibres are ubiquitous. Many garments are white but over the lifetime of these garments
10 the whiteness is dulled reducing the aesthetic value of the garment. There is a need to maintain the white appearance of such garments such that the aesthetic value is retained as long as possible. Such maintenance need also take into account mixed fibre garments such that any treatment is not
15 overly selective to one type of fibre over another.

Bleach, fluorescers and shading agents are used in modern wash processes to maintain-whiteness. The fluorescers and shading agents that are currently available, do not deposit
20 on polyester fibres of garments to a significant degree. All fibres may be subjected to a bleaching process but over time such treatment can lead to the garment taking a yellow hue.
There is a need to provide technology that maintains and
25 enhances the white appearance of polyester-cotton comprising garments.
SUMMARY OF THE INVENTION
Hydrophobic dyes have been found to be substantive to
30 polyester fibres under normal domestic wash conditions. At
low levels this provides a shading whiteness benefit.

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In one aspect the present invention provides a laundry treatment composition comprising: between 0.0001 to 0.1 wt % of a hydrophobic dye for shading polyester; between 0.0001 to 0.1 wt % of one or more other dyes selected from cotton
5 substantive shading dyes of the group consisting of: hydrolysed reactive dye; acid dye; and direct dye; and, between 2 to 60 wt % of a surfactant.

In another aspect the present invention provides a method of 10 treating a textile, the method comprising the steps of:
(i) treating a textile with an aqueous solution of a hydrophobic dye, the aqueous solution comprising from 1 ppb to 5 ppm of the hydrophobic dye, from 1 ppb to 5 ppm of a second dye selected from the group consisting of: hydrolysed
15 reactive dye; acid dye; and direct dye; and, from 0.2 g/L to 3 g/L of a surfactant; and, (ii) rinsing and drying the textile. Most preferably the hydrophobic dye is at a concentration in the range from 10 ppb to 500 ppb. It is preferred that the aqueous solution has an ionic strength
20 from 0.001 to 0.5. The present invention also extends to the aqueous solution used in the method. The method is preferably applied to a textile that has been worn at least one and therefore is soiled.
25 A "unit dose" as used herein is a particular amount of the laundry treatment composition used for a type of wash, conditioning or requisite treatment step. The unit dose may be in the form of a defined volume of powder, granules or tablet or unit dose detergent liquid.
30

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DETAILED DESCRIPTION OP THE INVENTION
When a garment is of mixed fibre, i.e., polyester cotton, dyes that are substantive to each respective fibre are required because otherwise even whiteness across the fibre
5 threads is not maintained.
It is preferred that the other dye, as for the hydrophobic dye, has a maximum extinction coefficient greater than 1000 L/mol/cm in the wavelength range of 400 to 750 nm. Tuning
10 of levels of the respective dyes in the composition will be such that dye deposition to the polyester and cotton will be aesthetically matched. It is preferred that the dyes have a peak absorption wavelength of from 550nm to 650nm, preferably from 570nm to 630nm. A combination of dyes may be
15 used which together have the visual effect on the human eye as a single dye having a peak absorption wavelength on polyester or cotton of from 550nm to 6 50nm, preferably from 570nm to 630nm. This may be provided, for example by mixing a red and green-blue dye to yield a blue or violet shade. A
20 specific example for the acid dyes is a mixture of acid red 17 and acid black 1. The same spectral quantities are required for both the cotton and polyester substantive dyes.
HYDROPHOBIC DYE
25 Hydrophobic dyes are defined as organic compounds with a
maximum extinction coefficient greater than 1000 L/mol/cm in the wavelength range of 400 to 750 nm and that are uncharged in aqueous solution at a pH in the range from 7 to 11. The hydrophobic dyes are devoid of polar solubilizing groups. In
30 particular the hydrophobic dye does not contain any
sulphonic acid, carboxylic acid, or quaternary ammonium

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groups. The dye chromophore is preferably selected from the group comprising: azo; anthraquinone; phthalocyanine; and, triphenylmethane chromophores. Most preferred are azo and anthraquinone dye chromophores.
5
Many examples of hydrophobic dyes are found in the classes of solvent and disperse dyes.
Shading of white garments may be done with any colour 10 depending on consumer preference. Blue and Violet are
particularly preferred shades and consequently preferred dyes or mixtures of dyes are ones that give a blue or violet shade on white polyester.
15 A wide range of suitable solvent and disperse dyes are
available. However detailed toxicological studies have shown that a number of such dyes are possible carcinogens, for example disperse blue 1. Such dyes are not preferred. More suitable dyes may be selected from those solvent and
20 disperse dyes used in cosmetics. For example as listed by the European Union in directive 76/768/EEC Annex IV part 1. For example disperse violet 27 and solvent violet 13.

It is most preferred that the hydrophobic dye is
25 incorporated into a composition by dissolution in a surfactant slurry or by granulation using non-ionic surfactant to solubilize the dye.

HYDROLYSED REACTIVE DYE (C4400)
30 The reactive dyes may be considered to be made up of a chromophore which is linked to an anchoring moiety. The

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chromophore may be linked directly to the anchor or via a bridging group. The chromophore serves to provide a colour and the anchor to bind to a textile substrate.
5 A marked advantage of reactive dyes over direct dyes is that their chemical structure is much simpler, their absorption bands are narrower and the dyeing/shading are brighter; industrial Dyes, K. Hunger ed. Wiley-VCH 2003 ISBN 3-527-30426-6. However, mammalian contact with reactive dyes
10 results in irritation and/or sensitisation of the
respiratory tract and/or skin. In addition, wash conditions are not ideal for deposition of dyes because the efficiency of deposition is low.
15 With regard to reducing irritation and/or sensitisation, it is preferred that each individual anchor group of each reactive dyes is hydrolysed such that the most reactive group(s) of anchor groups of the dye is/are hydrolysed. In this regard, the term hydrolysed reactive dye encompasses
20 both fully and partially hydrolysed reactive dyes.
The reactive dye may have more than one anchor. If the dye has more than one anchor, then each and every anchor, that contributes to irritation and/or sensitisation, needs to be
25 hydrolysed to the extent discussed above.
The hydrolysed dyes comprise a chromophore and an anchor that are covalently bound and may be represented in the following manner: chromophore-anchor. The linking between
30 the chromophore and an anchor are preferably provided by -NH-CO-, -NH-, NHCO-CH2CH2-, -NH-CO-, or -N=N-.

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Preferably the hydrolysed reactive dye comprises a chromophore moiety covalently bound to an anchoring group, the anchoring group for binding to cotton, the anchoring group selected from the group consisting of:
5 heteroaromatic ring, preferably comprising a nitrogen heteroatom, having at least one -OH substituent covalently

bound to the heteroaromatic ring, and

-SO2C—C—OH
H2 H2


It is preferred that the anchor group is of the form:












wherein:
n takes a value between 1 and 3;
15 X is "selected .from the group consisting of: -CI, -F, NHR, a quaternary ammonium group, -OR and -OH; R is selected from: an aromatic group, benzyl, a C1-C6-alkyl; and, wherein at least one X is -OH. It is preferred that R is selected from napthyl, phenyl, and -CH3. Most
20 preferably the anchor group is selected from the group consisting of:

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Preferably, the chromophore is selected from the group consisting of: azo, anthraquinone, phthalocyanine, formazan
5 and triphendioaxazine.
Preferably, the chromophore is linked to the hydrolysed anchor by a bridge selected from the group consisting of: -NH-CO-, -NH-, NHCO-CH2CH2-, -NH-CO-, and -N=N-.
10
Most preferred hydrolysed reactive dyes are hydrolysed Reactive Red 2, hydrolysed Reactive Blue 4, hydrolysed Reactive Black 5, and hydrolysed Reactive Blue 19.
15 ACID DYE (C4397) (C4389) (C4334) (C4335) (C4308) (C4333) The following are preferred classes of acid dyes.
The group comprising blue and violet acid dyes of structure

20 -03S
NH2 0 HN

where at least one of X and Y must be an aromatic group, preferably both, the aromatic groups may be a substituted
25 benzyl or napthyl group, which may be substituted with non water solubilising groups such as alkyl or alkyloxy or

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aryloxy groups, X and Y may not be substituted with water solubilising groups such as sulphonates or carboxylates, most preferred is where X is a nitro substituted benzyl group and Y is a benzyl group.
5
The group comprising red acid dyes of structure



-O3s
-O3S
or

10
15

where B is a napthyl or benzyl group that may be substituted with non water solubilising groups such as alkyl or alkyloxy or aryloxy groups, B may not be substituted with water solubilising groups such as sulphonates or carboxylates.
The group the following structures:



and

20 wherein:
the naphthyl is substituted by the two SO3- groups in one of the following selected orientations about ring: 7,8; 6,8;

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5,8; 4,8; 3,8; 7,6; 7,5; 7,4; 7,3; 6,5; 6,4; 5,4; 5,3, and 4,3;
B is an aryl group selected from phenyl and naphthyl, the aryl group substituted with a group independently selected from: one -NH2 group; one -NH-Ph group; one -N=N~C6H5; one -N=N-C10H7 group; one or more -OMe; and, one or more -Me. The group of the following structures:



10








15

wherein:
X is selected from the group consisting of -OH and -NH2;
R is selected from the group consisting of -CH3 and -OCH3;
n is an integer selected from 0, 1 2 and 3; and
one of the rings A, B- and C is substituted by one sulphonate
group.


The following are examples of preferred acid dyes that may 20 be used with the present invention: acid black 24, acid blue
25, acid blue 29, acid black 1, acid blue 113, acid red 17, acid red 51, acid red 73, acid red 88, and acid red 87, acid red 91, acid red 92, acid red 94, and acid violet 17.

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DIRECT DYE (C43Q7)
The following are examples of direct dyes that may be used with the present invention. Preferably the hydrolysed dye is used in combination with a direct dye.
5
Preferred direct dyes are selected from the group comprising tris-azo direct blue dyes of the formula:



10
where at least two of the A, B and C napthyl rings are subsituted by a sulphonate group, the C ring may be substituted at the 5 position by an NH2 or NHPh group, X is
15 a benzyl or napthyl ring substituted with upto 2 sulphonate groups and may be substituted at 2 position with a OH group and may also be substituted with an NH2 or NHPh group,
Most preferred direct dyes are selected from the group 20 comprising bis-azo direct violet dyes of the formula:


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where Z is H or phenyl, the A ring is preferably substituted by a methyl and methoxy group at the positions indicated by arrows, the A ring may also be a naphthyl ring, the Y group is a benzyl or naphthyl ring, which is substituted by
5 sulphate group and may be mono or disubstituted by methyl groups.

Preferred examples of these dyes are direct violet 5, 7, 9, 11, 31, and 51. Further preferred examples of these dyes
10 are also direct blue 34, 70, 71, 72, 75, 78, 82, and 120.
BALANCE CARRIERS AND ADJUNCT INGREDIENTS
The laundry treatment composition in addition to the dye comprises the balance carriers and adjunct ingredients to
15 10O wt % of the composition.
These may be, for example, surfactants, builders, foam agents, anti-foam agents, solvents, fluorescers, bleaching agents, and enzymes. The use and amounts of these components
20 are such that the composition performs depending upon
economics, environmental factors and use of the composition.
The composition may comprise a surfactant and optionally other conventional detergent ingredients. The composition
25 may also comprise an enzymatic detergent composition which comprises from 0.1 to 50 wt %, based on the total detergent composition, of one or more surfactants. This surfactant system may in turn comprise 0 to 95 wt % of one or more anionic surfactants and 5 to 100 wt % of one or more
30 nonionic surfactants. The surfactant system may additionally contain amphoteric or zwitterionic detergent compounds, but

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this in not normally desired owing to their relatively high cost. The enzymatic detergent composition according to the invention will generally be used as a dilution in water of about 0.05 to 2 wt%.
5
It is preferred that the composition comprises between 2 to 60 wt % 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
10 described "Surface Active Agents" Vol. 1, by Schwartz &
Perry, Interscience 1949, Vol. 2 by Schwartz, Perry & Berch, Interscience 1958, in the current edition of "McCutcheon1s Emulsifiers and Detergents" published by Manufacturing Confectioners Company or in "Tenside-Taschenbuch", H.
15 Stache, 2nd Edn., Carl Hauser Verlag, 1981.
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
20 example, aliphatic alcohols, acids, amides or alkyl phenols with alkylene oxides, especially ethylene oxide either alone or with propylene oxide. Specific nonionic detergent compounds are C6 to C22 alkyl phenol-ethylene oxide condensates, generally 5 to 25 EO, i.e. 5 to 25 units of
25 ethylene oxide per molecule, and the condensation products of aliphatic C8 to C18 primary or secondary linear or branched alcohols with ethylene oxide, generally 5 to 40 EO.
Suitable anionic detergent compounds which may be used are 30 usually water—soluble alkali metal salts of organic
sulphates and sulphonates having alkyl radicals containing

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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
5 obtained by sulphating higher C8 to C18 alcohols, produced for example from tallow or coconut oil, sodium and potassium alkyl C9 to C20 benzene sulphonates, particularly sodium linear secondary alkyl to C10 to C15 benzene sulphonates; and sodium alkyl glyceryl ether sulphates, especially those
10 ethers of the higher alcohols derived from tallow or coconut oil and synthetic alcohols derived from petroleum. The preferred anionic detergent compounds are sodium C11 to C15 alkyl benzene sulphonates and sodium C12 to Cu alkyl sulphates. Also applicable are surfactants such as those
15 described in EP-A-328 177 (Unilever), which show resistance to salting-out, the alkyl polyglycoside surfactants described in EP-A-070 07 4, and alkyl monoglycosides.

Preferred surfactant systems are mixtures of anionic with
20 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 C16 to C18 primary alcohol sulphate together with a
25 C12 to C15 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
30 amounts in the range from about 5% to about 40 wt % of the surfactant system.

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CATIONIC COMPOUND
When the present invention is used as a fabric conditioner
it needs to contain a cationic compound.
5 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.
10
It is preferred if the quaternary ammonium compound has the
following formula:

I

in which R1 is a Cu to C22 alkyl or alkenyl chain; R2, R3 and
15 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.
20 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 axe independently selected from C1 to C4 alkyl chains and X" is a compatible anion.
25
A detergent composition according to claim 1 in which the ratio of (ii) cationic material to (iv) anionic surfactant is at least 2:1.

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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
5 surfactant is from 1:100 to 50:50, more preferably 1:50 to 20:50.
The cationic compound may be present from 0.02 wt % to 20 wt % of the total weight of the composition.
10
Preferably the cationic compound may be present from 0.05 wt % to 15 wt %, a more preferred composition range is from 0.2 wt % to 5 wt %, and most preferably the composition range is from 0.4 wt % to 2.5 wt % of the total weight of the
15 composition.
If the product is a liquid it is preferred if the level of cationic surfactant is from 0.05 wt % to 10 wt % of the total weight of the composition. Preferably the cationic
20 compound may be pre-sent from 0.2 wt % to 5 wt %, and most
preferably from 0.4 wt % to 2.5 wt % of the total weight of the composition.

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

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BLEACHING SPECIES
The laundry treatment composition may comprise bleaching species. The bleaching species, for example, may selected from perborate and percarbonate. These peroxyl species may
5 be further enhanced by the use of an activator, for example, TAED or SNOBS. Alternatively or in addition to, a transition metal catalyst may used with the peroxyl species. A transition metal catalyst may also be used in the absence of peroxyl species where the bleaching is termed to be via
10 atmospheric oxygen, see, for example WO02/48301.
Photobleaches, including singlet oxygen photobleaches, may be used with the laundry treatment composition. A preferred photobleach is vitamin K3.
15 FLUORESCENT AGENT
The laundry treatment composition most preferably comprises a fluorescent agent(optical brightener). Fluorescent agents are well known and many such fluorescent agents are available commercially. Usually, these fluorescent agents
20 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 laundry treatment composition is generally from 0.005 to 2 wt %, more preferably 0.01 to 0.1 wt %. Preferred classes of fluorescer
25 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-
30 napthol[l,2-d]trazole, disodium 4,4'-bis{[(4-anilino-6- (N methyl-N-2 hydroxyethyl) amino 1,3,5-triazin-2-

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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-sulfoslyryl)biphenyl.
5
EXAMPLES
Example 1
Approximately 1000 ppm solutions of the dyes listed in the 10 table below, were made in ethanol.
A stock solution of 1.8g/L of a base washing powder in water was created. The washing powder contained 18% NaLAS, 7 3% salts (silicate, sodium tri-poly-phosphate, sulphate,
15 carbonate), 3% minors including perborate, fluorescer and enzymes, remainder impurities and water. The solution was divided into 100ml aliquots and the solvent dyes added from the ethanol solutions to give approximately 5.8ppm solutions. 1 g of pure woven polyester fabric was added to
20 each of the wash solutions and the solution then shaken for 30 minutes, rinsed and dried. From the colour of the fabric it was clear that dye had deposited to the fabric. To quantify this the colour was measured using a reflectance spectrometer and expresses as the deltaE value compared to a
25 polyester washed analogously but without dye present.

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The results are given below

Dye Dye - ppmin solution deltaE
No dye {to indicate error level) 0 0.2
solvent blue 59 5.8 0.7
solvent blue 35 5.6 2,7
solvent violet 13 5.9 2.2
solvent black 3 5,7 5.0

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Example 2
Experiment was repeated using polyester Pleece rabric.The
5 solvent dyes, solvent violet 13, solvent black 3, solvent red 24, solvent blue 35 and solvent blue 59 gave deltaE's of 6.2, 9.5, 15.8, 13.5 and 1.8 respectively. Again showing they all deposited to polyester fabric.

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Example 3
To examine the sensitivity of deposition to formulation components the experiment of Example 2 was repeated, except different wash solutions were utilised as outlined below and
5 4.9ppm solvent violet 13 used in solution. In all
experiments washes were also conducted without dye, the colour of the cloth compared using a reflectometer and expressed as deltaE. The results are shown below.
Wash conditions deltaE
0.3g/L SDS surfactant 7.0
0.3g/L SDS surfactant + 3g/LNaCl 8.3
0.3g/L SDS surfactant + 3g/LNaCl + pH adjusted to 10.5using NaOH 4.7
0.3g/L SDS surfactant + 3g/LNaCl + 0.5g/L 7EO nonionicsurfactant 4.2
1.6g/L surfactant 5.5

















10
Dye was deposited to the polyester in all cases.
Example 4
15 The experiments of Example 1 was repeated using different levels of solvent violet 13 and solvent black 3 and a wash time of 45 minutes. The results are shown below. The shading effect expresses as deltaE builds up approximately linearly with amount of dye in this range.
20

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Dye deltaE
No dye 0.2
0.5 ppm solvent violet 13 0.5
2.0 ppm solvent violet 13 1.3
4.0 ppm solvent violet 13 3.3
0.9 ppm solvent black 3 1.0
1.9 ppm solvent black 3 2.0
Example 5
The experiments of Example 1 was repeated except 2.5 ppm
5 solvent violet 13 was used and a liquor to cloth ratio of 30:1. After the wash the cloth was dried and the deltaE measured compared to cloth washed without dye. The process was the repeated 5 more times and the results shown below. The shading effect shading effect expresses as deltaE builds
10 up approximately linearly with, washes in this range.

Wash number deltaE
1 0.7
2 . 1.5
3 1.9
4 2.1
5 2.5
6 3.1
This experiment in combination with Example 4 shows that
15 very low levels of solvent violet 13 could be used in
formulations and the shading effect allowed to build over a number of washes (5-40).

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Example 6
The experiment of Example 1 was repeated except using a different selection and combination of dyes as shown in the table below. The cloth used was 1.4g of woven 50:50
5 polyester:cotton, washed in 100ml solution for 30 minutes. Polyester substantive and cotton substantive dyes may be used together to give bigger benefits.

Ppm dye
Solvent violet 13 Direct Violet 51 deltaE
0 0 0.1
1 0 1.1
1 0.06 2.9
0 0.06 2.0
10

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We Claim:
1. A laundry treatment composition comprising:
between 0.0001 to 0.1 wt % of a hydrophobic dye for
5 shading polyester;
between 0.0001 to 0.1 wt % of one or more other dyes selected from cotton substantive shading dyes of the group consisting of: hydrolysed reactive dye; acid dye; and direct dye; and,
10 between 2 to 60 wt % of a surfactant.
2. A laundry treatment composition according to claim 1,
wherein the hydrophobic dye is an organic compounds with
a maximum extinction coefficient greater than 1000
15 L/mol/cm in the wavelength range from 400 to 750 nm and uncharged in an aqueous solution having a pH in the range 7 to 11.
3. A laundry treatment composition according to claim 2,
20 wherein the hydrophobic dye has a maximum extinction
coefficient in the wavelength range from 550 to 650 nm
4. A laundry treatment according to any preceding claim,
wherein respective dyes individually substantive to
25 cotton and polyester have respective peak absorption wavelength on cotton and polyester of from 550nm to 650nm, preferably from 570nm to 630nm.
5. A laundry treatment according to claim 4, wherein the
30 dye comprises a combination of dyes which together have
the visual effect on the human eye as a single dye

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having a peak absorption wavelength on polyester and cotton of from 550nm to 650nm, preferably from 570nm to 630nm.
5 6. A laundry treatment composition according to any
preceding claim, wherein the chromophore of the hydrophobic dye is selected from the group consisting of: azo; and, anthraquinone, and the chromophore of the other dye is selected from the group consisting of: azo,
10 anthraquinone, phthalocyanine, formazan and triphendioaxazine.

7. A laundry treatment composition according to any preceding claim, wherein the hydrophobic dye is selected
15 from: disperse blue 79, solvent black 3, solvent violet 13, solvent blue 59, solvent blue 35, solvent red 24, disperse red 1, disperse blue 3, and disperse blue 106.
8. A laundry treatment composition according to any preceding claim, wherein the laundry treatment composition comprises from 0.005 to 2 wt % of a fluorescer.
A method of treating a textile, the method comprising
25 the steps of:
(i) treating a textile with an aqueous solution of a
hydrophobic dye, the aqueous solution comprising from 10 ppb to 1 ppm of the hydrophobic dye, from 10 ppb to 1 ppm of a second dye selected from the group consisting
30 of: hydrolysed reactive dye; acid dye; and direct dye; and, from 0.2 g/L to 3 g/L of a surfactant; and,

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(ii) rinsing and drying the textile.
10. A method of treating a textile according to claim 9,
wherein the aqueous solution has an ionic strength from 5 0.001 to 0.5.

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AMENDED CLAIMS
[received by the International Bureau on 08 December 2005 (08.12.2005)]
We Claim:
1. A laundry treatment composition comprising:
between 0.0001 to 0.1 wt % of a hydrophobic dye for 5 shading polyester;
between 0.0001 to 0.1 wt % of one or more other dyes selected from cotton substantive shading dyes of the group consisting of: hydrolysed reactive dye; acid dye; and direct dye; and, between 2 to 60 wt % of a
10 surfactant,
wherein the acid dye is selected from a group consisting of: blue and violet acid dyes of structure

15

/Y


where at least one of X and Y must be an aromatic group, preferably both, the aromatic groups may be a
20 substituted benzyl or napthyl group, which may be
substituted with non water solubilising groups such as alkyl or alkyloxy or aryloxy groups, X and Y may not be substituted with water solubilising groups such as sulphonates or carboxylates, most preferred is where X
25 is a nitro substituted benzyl group and Y is a benzyl group ;
red acid dyes of structure:
AMENDED SHEET (ARTICLE 19)

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where B is a napthyl or benzyl group that may be
5 substituted with non water solubilising groups such as alkyl or alkyloxy or aryloxy groups, B may not be substituted with water solubilising groups such as sulphonates or carboxylates;


10


acid dyes the following structures:



and

15
20

wherein:
the naphthyl is substituted by the two S03- groups in one of the following selected orientations about ring: 7,8; 6,8; 5,8; 4,8; 3,8; 7,6; 7,5; 7,4; 7,3; 6,5; 6,4; 5,4; 5,3, and 4,3;
B is an aryl group selected from phenyl and naphthyl, the aryl group substituted with a group independently selected from: one -NH2 group; one -NH-Ph group; one -

AMENDED SHEET (ARTICLE 19)

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N=N-C6H5; one -N=N-C10H7 group; one or more -OMe; and,
one or more —Me;
acid dyes of the following structures:




10

wherein:
X is selected from the group consisting of -OH and -NH2;
R is selected from the group consisting of -CH3 and -
OCH3 ;
n is an integer selected from 0, 12 and 3; and
one of the rings A, B and C is substituted by one
sulphonate group; and



15

wherein the direct dye is selected from the group consisting of: tris-azo direct blue dyes of the formula:

X— N


20

AMENDED SHEET (ARTICLE 19)

WO 2006/032327 PCT/EP2005/008629
29

10

where at least two of the A, B and C napthyl rings are subsituted by a sulphonate group, the C ring may be substituted at the 5 position by an NH2 or NHPh group, X is a benzyl or napthyl ring substituted with upto
sulphonate groups and may be substituted at 2 position with a OH group and may also be substituted with an NH2 or NHPh group; and
bis-azo direct violet dyes of the formula:
o3s
OCH3


where Z is H or phenyl, the A ring is optionally substituted by a. methyl and methoxy group at the
15 positions indicated by arrows, the A ring may also be a naphthyl ring, the Y group is a benzyl or naphthyl ring, which is substituted by sulphate group and may be mono or disubstituted by methyl groups.
20 2. A laundry treatment composition according to claim 1,
wherein the hydirophobic dye is an organic compounds with a maximum extinction coefficient greater than 1000 L/mol/cm in the wavelength range from 4 00 to 750 nm and uncharged in an aqueous solution having a pH in the
25 range 7 to 11.
AMENDED SHEET (ARTICLE 19)

WO 2006/032327

PCT/EP2005/008629

30
3. A laundry treatment composition according to claim 2, wherein the hydrophobic dye has a maximum extinction coefficient in the wavelength range from 550 to 650 nm.
5 4. A laundry treatment according to any preceding claim,
wherein respective dyes individually substantive to cotton and polyester have respective peak absorption wavelength on cotton and polyester of from 550nm to 650nm.
10
5. A laundry treatment according to claim 4, wherein the
dye comprises a combination of dyes which together have
the visual effect on the human eye as a single dye
having a peak absorption wavelength on polyester and
15 cotton of from 57 Onm to 630nm.
6. A laundry treatment composition according to any
preceding claim, -wherein the chromophore of the
hydrophobic dye is selected from the group consisting
20 of: azo; and, anthraquinone, and the chromophore of the hydrolysed reactive dye is selected from the group consisting of: azo, anthraquinone, phthalocyanine, formazan and triphendioaxazine.
25 7. A laundry treatment composition according to any
preceding claim, -wherein the hydrophobic dye is selected from: disperse blue 79, solvent black 3, solvent violet 13, solvent blue 59, solvent blue 35, solvent red 24, disperse red 1, disperse blue 3, and disperse blue 106.
30
AMENDED SHEET (ARTICLE 19)

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31
8. A laundry treatment composition according to any preceding claim; wherein the laundry treatment composition comprises from 0.005 to 2 wt % of a fluorescer.
9. A method of treating a textile, the method comprising the steps of:
(i) treating a textile with an aqueous solution of a hydrophobic dye, the aqueous solution comprising from
10 ppb to 1 ppm of the hydrophobic dye, from 10 ppb to 1 ppm of a second dye selected from the group consisting of: hydrolysed reactive dye; acid dye as defined in claim 1; and direct dye as defined in claim 1; and, from 0.2 g/L to 3 g/L of a surfactant; and,
15 (ii) rinsing and drying the textile.
10. A method of treating a textile according to claim 9,
wherein the aqueous solution has an ionic strength from
0.001 to 0.5.
20
Dated this 20th day of March 2007
HINDUSTAN LEVER LIMITED
(S. Venkatramani) Senior Patents Manager
AMENDED SHEET (ARTICLE 19)

Documents:

398-mumnp-2007-cancelled pages(19-2-2009).pdf

398-MUMNP-2007-CLAIMS(19-2-2009).pdf

398-mumnp-2007-claims(20-3-2007).pdf

398-mumnp-2007-claims(amended)-(19-2-2009).pdf

398-mumnp-2007-claims(amended)-(20-3-2007).pdf

398-MUMNP-2007-CLAIMS(CANCELLED PAGES)-(19-2-2009).pdf

398-mumnp-2007-claims(granted)-(9-9-2009).pdf

398-mumnp-2007-claims.doc

398-mumnp-2007-claims.pdf

398-mumnp-2007-correspondence 1(12-5-2008).pdf

398-mumnp-2007-correspondence(11-7-2007).pdf

398-MUMNP-2007-CORRESPONDENCE(18-8-2008).pdf

398-MUMNP-2007-CORRESPONDENCE(19-2-2009).pdf

398-MUMNP-2007-CORRESPONDENCE(3-8-2009).pdf

398-MUMNP-2007-CORRESPONDENCE(8-2-2012).pdf

398-mumnp-2007-correspondence(ipo)-(15-9-2009).pdf

398-mumnp-2007-correspondence-others.pdf

398-mumnp-2007-correspondence-received.pdf

398-mumnp-2007-description (complete).pdf

398-MUMNP-2007-DESCRIPTION(COMPLETE)-(19-2-2009).pdf

398-mumnp-2007-description(complete)-(20-3-2007).pdf

398-mumnp-2007-description(granted)-(9-9-2009).pdf

398-MUMNP-2007-FORM 1(20-3-2007).pdf

398-mumnp-2007-form 13(3-10-2007).pdf

398-mumnp-2007-form 18(11-7-2007).pdf

398-mumnp-2007-form 2(19-2-2009).pdf

398-mumnp-2007-form 2(complete)-(20-3-2007).pdf

398-mumnp-2007-form 2(granted)-(9-9-2009).pdf

398-MUMNP-2007-FORM 2(TITLE PAGE)-(19-2-2009).pdf

398-mumnp-2007-form 2(title page)-(20-3-2007).pdf

398-mumnp-2007-form 2(title page)-(granted)-(9-9-2009).pdf

398-MUMNP-2007-FORM 3(19-2-2009).pdf

398-mumnp-2007-form 3(20-3-2007).pdf

398-MUMNP-2007-FORM 5(19-2-2009).pdf

398-mumnp-2007-form 5(20-3-2007).pdf

398-mumnp-2007-form-1.pdf

398-mumnp-2007-form-2.doc

398-mumnp-2007-form-2.pdf

398-mumnp-2007-form-3.pdf

398-mumnp-2007-form-5.pdf

398-mumnp-2007-form-pct-ipea-409.pdf

398-mumnp-2007-form-pct-ipea-416.pdf

398-mumnp-2007-form-pct-ipea-seperate sheet-409.pdf

398-MUMNP-2007-OTHER DOCUMENT(19-2-2009).pdf

398-mumnp-2007-pct-search report.pdf

398-mumnp-2007-wo international publication report(20-3-2007).pdf


Patent Number 235940
Indian Patent Application Number 398/MUMNP/2007
PG Journal Number 38/2009
Publication Date 18-Sep-2009
Grant Date 09-Sep-2009
Date of Filing 20-Mar-2007
Name of Patentee HINDUSTAN UNILEVER LIMITED
Applicant Address Hindustan Lever House, 165-166 Backbay Reclamation, Mumbai 400 020
Inventors:
# Inventor's Name Inventor's Address
1 BATCHELOR STEPHEN NORMAN Unilever R&D Port Sunlight, Quarry Road East, Bebington Wirral Merseyside CH63 3JW
PCT International Classification Number C11D3/42
PCT International Application Number PCT/EP2005/008629
PCT International Filing date 2005-08-08
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 0421145.4 2004-09-23 U.K.