A liquid laundry composition

Abstract

The present invention relates to a liquid laundry composition which has been found to deliver enhanced fragrance impact. This has been achieved through a combination of a surfactant, specific chelating agent and select polymer for use in a fabric cleaning composition that comprises a fragrance component that delivers enhanced fragrance impact.

Description

[0001] P0001101CPL

[0002] 1

[0003] A LIQUID LAUNDRY COMPOSITION

[0004] Field of the Invention

[0005] The present invention relates to a liquid laundry composition which has been found to deliver 5 enhanced fragrance impact.

[0006] Background of the Invention

[0007] Washing fabrics, also known as laundering or simply as laundry, is one of the main chores that people undertake routinely. For this, people have been relying on detergent compositions that are widely available. Typically, a fabric is washed by contacting it with a detergent composition either in neat or diluted form, rinsing the fabric one or more times with water; and finally, drying it. In the washing step, a fabric is cleaned by mechanically agitating it using hands and / or by using suitable cleaning means e.g. a brush, in so-called hand-wash method. Alternatively, in so-called machine-wash method, a fabric is cleaned by mechanical agitations carried out by a machine. In 15 either case, a step of soaking a fabric, in a neat or diluted detergent composition, may be carried out for a desired duration e.g. 30 to 60 minutes. The step of drying may also be carried out by using machines; or simply by exposing the fabric to air, and if possible, under the sun.

[0008] The present invention relates to a liquid laundry composition that could be delivered either during 20 the wash step or the rinsing step for delivering enhanced perfume impact in addition to making the fabric clean and free of stains.

[0009] The present inventors in seeking to solve the above problem have hit upon a combination of a surfactant, specific chelating agent and select polymer for use in a fabric cleaning composition 25 that comprises a fragrance component that delivers enhanced fragrance impact.

[0010] It is therefore an object of the present invention to provide for a fabric cleaning composition that delivers enhanced fragrance impact.

[0011] 30 Summary of the Invention

[0012] The first aspect of the present invention relates to a liquid laundry composition comprising (i) a surfactant,

[0013] (ii) a sequestrant selected from trisodium methyl glycine diacetate (MGDA), L-glutamic acid N, N-diacetic acid tetrasodium salt (GLDA), Tetra sodium iminosuccinic acid sodium (IDS) ,P0001101CPL

[0014] 2

[0015] ethylene diamine diacetic acid (EDDA) , ethylene diamine disuccinic acid (EDDS), capryl hydroxamic acid (CHA) or mixtures thereof,

[0016] (iii) a fragrance compound and

[0017] (iv) an anionic polymer of

[0018] 5 Formula I

[0019]

[0020] Where x has a value from 20 to 200;

[0021] y has a value from 0 to 200; and

[0022] R is CH2COOH or H; and

[0023] (v) 40 to 90 wt% water.

[0024] Detailed Description of the Invention

[0025] For the avoidance of doubt, any feature of one aspect of the present invention may be utilised in 15 any other aspect of the invention. The word "comprising" is intended to mean "including" but not necessarily "consisting of” or "composed of". Thus, the term "comprising" is meant not to be limiting to any subsequently stated elements, but rather to optionally also encompass nonspecified elements of major or minor functional importance. In other words, the listed steps or options need not be exhaustive. Whenever the words "including" or "having" are used, these 20 terms are meant to be equivalent to "comprising" as defined above. It is noted that the examples given in the description below are intended to clarify the invention and are not intended to limit the invention to those examples per se. Except in the examples, or where otherwise explicitly indicated, all numbers in this description indicating amounts of material or conditions of reaction, physical properties of materials and / or use are to be understood as modified by the word "about".

[0026] 25 Unless specified otherwise, numerical ranges expressed in the format "x to y" are understood to include x and y. When for a specific feature multiple preferred ranges are described in the format "x to y", it is understood that all ranges combining the different endpoints are also contemplated. Unless specified otherwise, amounts as used herein are expressed in percentage by weight based on total weight of the composition and is abbreviated as “wt%”.

[0027] 30 The present invention relates to the benefit of delivering fragrance on to surfaces. The surfaces may be soft surfaces like those in upholstery, curtains, bedsheets, blankets, towels and mops used for cleaning and more importantly clothes worn by people. They may be made from cotton,P0001101CPL

[0028] 3

[0029] fabric made from synthetic polymer fiber or combinations of these or other fibers like wool, silk or similar material. Most preferably the fabric is made of cotton, synthetic polymer or combinations of these.

[0030] The composition of the invention includes a surfactant. The surfactant may be selected from 5 anionic, non-ionic, amphoteric or mixtures thereof. The most preferred surfactant for inclusion in the composition of the invention is one or more of alcohol ethoxylate, alkyl ether sulfate and linear alkyl benzene sulfonate surfactant. Preferably the surfactant is included in a 3 to 30 wt%, more preferably 8 to 25 wt% of the composition.

[0031] The surfactant is preferably anionic in nature. Preferred anionic surfactants are of the organic 10 sulfates and sulfonates 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 such materials include alkyl sulfates, alkyl ether sulfates, alkaryl sulfonates, alpha-olefin sulfonates and mixtures thereof. The alkyl radicals preferably contain from 10 to 18 carbon atoms and may be unsaturated. The alkyl ether sulfates may contain from one to ten ethylene oxide or propylene oxide units per molecule. The counterion for anionic surfactants is generally an alkali metal such as sodium or potassium; or an ammoniacal counterion such as monoethanolamine, (MEA) diethanolamine (DEA) or triethanolamine (TEA). Mixtures of such counterions may also be employed. Sodium and potassium are preferred.

[0032] Most preferred surfactants are of the alkylbenzene sulfonates type, particularly linear 20 alkylbenzene sulfonates (LAS) with an alkyl chain length of from 10 to 18 carbon atoms. Some alkyl sulfate surfactant (PAS) may be used, such as non-ethoxylated primary and secondary alkyl sulphates with an alkyl chain length of from 10 to 18. Preferred anionic surfactants are selected from one or more of alkyl benzene sulphonate, alkyl sulphate and alkyl ether sulphate. When anionic surfactant is included, it is preferably in 2 to 25%, more preferably 3 to 18%, further more 25 preferably 4 to 15% by weight of the composition.

[0033] Preferably, the composition comprises from 1 to 20%, more preferably 3 to 20 wt% non-ionic surfactant based on the total weight of composition. A preferred class of nonionic surfactant for use in the invention includes aliphatic Cs to Cis, more preferably C12 to C15 primary linear alcohol ethoxylates with an average of from 3 to 20, more preferably from 5 to 10 moles of ethylene oxide per mole of alcohol. A preferred non-ionic surfactant are the C 16 / 18 Alcohol ethoxylates.

[0034] The non-ionic surfactant may be an alkyl polyglycosides. The alkyl chain length is generally defined as an average alkyl chain length. The alkyl chain length of the alkyl poly glycoside preferably comprises between 4 and 18 carbon atoms. The alkyl chain is preferably a linear alkyl chain. The alkyl chain is preferably derived from fatty alcohols, more preferably the alkyl chain is 35 derived from natural fatty alcohols. The preferred alkyl polyglycoside is alkyl polyglucoside.P0001101CPL

[0035] 4

[0036] It is preferred that the composition comprises a surfactant system which is mixture of an anionic surfactant and a non-ionic surfactant. The surfactant system may be included in 3 to 30% by weight of the composition. The surfactant system preferably comprises an anionic surfactant 5 selected from one or more of an alkyl ether sulphate surfactant, an alkyl sulphate surfactant and an alkyl benzene sulphonate surfactant; and a non-ionic surfactant which is an alcohol ethoxylate surfactant.

[0037] The surfactant may be an amphoteric surfactant. The amphoteric surfactant is preferably selected from one or both of alkyl amidopropyl betaine surfactant and amine oxide surfactant. Preferred alkyl amidopropyl betaine is cocoamido propyl betaine. The amine oxide may be any one of the C8 - C18 alkyl amine n-oxide (which is broadly referred to an amine oxide). The preferred amine oxide is one or both of lauramine oxide or lauryl / myristyl amido propyl amine oxide. The more preferred amine oxide is lauramine oxide. Preferably, the composition 15 preferably comprises 0.1 to 5 wt%, more preferably 0.1 to 3 wt%, of the amphoteric surfactant.

[0038] The composition of the invention comprises a sequestrant. It is selected from one or more of trisodium methyl glycine diacetate (MGDA), L-glutamic acid N, N-diacetic acid tetrasodium (GLDA), Tetra sodium iminosuccinic acid sodium (IDS) , ethylene diamine diacetic acid (EDDA), ethylene diamine disuccinic acid (EDDS), or capryl hydroxamic acid (CHA). The preferred 20 sequestrant is one or more of MGDA, GLDA, or CHA most preferred being MGDA or GLDA. The composition preferably comprises 0.01 to 5.0%, more preferably 0.1 to 2% sequestrant by weight of the composition.

[0039] The composition of the invention comprises an anionic polymer which belongs to f the following 25 classes of polymers:

[0040] 30 Formula I

[0041]

[0042] P0001101CPL

[0043] 5

[0044] Where x has a value from 20 to 200;

[0045] y has a value from 0 to 200; and

[0046] R is CH2COOH or H;

[0047] An especially preferred polymer of this class is poly acrylic acid where R is H and y has a value 5 of 0.

[0048] Another preferred polymer of this class is poly acrylic acid co maleic acid where R is H and y has a value from 10 to 200.

[0049] Yet another preferred polymer of this class is poly itaconic acid where R is CH2COOH and y has a value of 0.

[0050] Commercially available polymers of the above class are available as Acusol 402, Acusol 445, and Acusol 479 (from Dow Chemicals), or Poly itaconate (from Itaconix).

[0051] Especially suitable polymer from the above classes of polymers for use in the present invention 15 is selected from polyacrylic acid, or polyitaconate. The composition preferably comprises 0.1 to 5%, more preferably 0.2 to 3% anionic polymer by weight of the composition.

[0052] The cleaning composition of the invention comprises a fragrance compound. Fragrance compound is also referred to as a fragrance component, a perfume or a perfume component and so these words / phrases are used interchangeably throughout this specification. Perfume 20 components may comprise odiferous materials and / or pro-fragrance materials. The liquid laundry composition of the invention preferably comprises 0.1 to 5 wt.% perfume, more preferably 0.5 to 3 wt. % free perfume.

[0053] Particularly preferred perfume components are blooming perfume components and substantive perfume components. Blooming perfume components are defined by a boiling point less than 25 250°C and a LogP or greater than 2.5. Substantive perfume components are defined by a boiling point greater than 250°C and a LogP greater than 2.5. Boiling point is measured at standard pressure (760 mm Hg). Preferably a perfume composition will comprise a mixture of blooming and substantive perfume components. The perfume composition may comprise other perfume components.

[0054] Useful fragrance components may include materials of both natural and synthetic origin. They include single compounds and mixtures. Specific examples of such components may be found in the current literature, e.g., in Fenaroli's Handbook of Flavor Ingredients, 1975, CRC Press; Synthetic Food Adjuncts, 1947 by M. B. Jacobs, edited by Van Nostrand; or Perfume and Flavor Chemicals by S. Arctander 1969, Montclair, N.J. (USA). These substances are well known to the 35 person skilled in the art of perfuming, flavouring, and / or aromatizing consumer products.P0001101CPL

[0055] 6

[0056] Preferably, the fragrance comprises a component selected from the group consisting of ethyl-2- methyl valerate (manzanate), limonene, (4Z)-cyclopentadec-4-en-1-one, dihyro myrcenol, dimethyl benzyl carbonate acetate, benzyl acetate, spiro[1,3-dioxolane-2,5'-(4',4',8',8'- tetramethyl-hexahydro-3',9'-methanonaphthalene)], benzyl acetate, Rose Oxide, geraniol, methyl 5 nonyl acetaldehyde, decanal, octanal, undecanal, verdyl acetate, tert-butylcyclohexyl acetate, cyclamal, beta ionone, hexyl salicylate, tonalid, phenafleur, octahydrotetramethyl acetophenone (OTNE), the benzene, toluene, xylene (BTX) feedstock class such as 2-phenyl ethanol, phenoxanol and mixtures thereof, the cyclododecanone feedstock class, such as habolonolide, the phenolics feedstock class such as hexyl salicylate, the C5 blocks or oxygen containing heterocycle moiety feedstock class such as gamma decalactone, methyl dihydrojasmonate and mixtures thereof, the terpenes feedstock class such as dihydromycernol, linalool, terpinolene, camphor, citronellol and mixtures thereof, the alkyl alcohols feedstock class such as ethyl-2- methylbutyrate, the diacids feedstock class such as ethylene brassylate, and mixtures of these components.

[0057] 15

[0058] Liquid laundry detergent compositions also generally comprise agents like soil release polymers, hydrotropes, co-surfactants, builders, polymeric thickeners, and shading dyes in addition to the above described ingredients. Soil release polymers (SRP) help to improve the detachment of 20 soils from fabric by modifying the fabric surface during washing. The SRP structure may also include capping groups to control molecular weight or to alter polymer properties such as surface activity. Preferred SRPs for use in the invention include copolyesters formed by condensation of terephthalic acid ester and diol, preferably 1 ,2 propanediol, and further comprising an end cap formed from repeat units of alkylene oxide capped with an alkyl group. The SRP, when included, 25 may range from 0.1 to 10%, desirably from 0.3 to 7%, more preferably from 0.5 to 5% by weight of the composition.

[0059] The composition of the invention preferably comprises an enzyme. Suitable enzymes for inclusion are amylase, protease or lipase.

[0060] 30 The laundry detergent composition in which the present invention is delivered, is in the liquid form. The term liquid may encompass emulsions, suspensions, and compositions having flowable yet stiffer consistency, known as gels or pastes. Pourable liquid detergent compositions preferably have a viscosity of from 200 to 1 ,500 mPa.s, preferably from 200 to 700 mPa.s. Such compositions generally have an aqueous continuous phase. The comprises 40 wt% to 90 wt%,P0001101CPL

[0061] 7

[0062] preferably 50 to 85 wt%, more preferably 60 to 85 wt% water. More preferably it comprises at least 70% wt. water.

[0063] A composition of the invention may contain further optional ingredients to enhance performance 5 and / or consumer acceptability. Examples of such ingredients include foam boosting agents, preservatives (e.g. bactericides), polyelectrolytes, anti-shrinking agents, anti-wrinkle agents, antioxidants, sunscreens, anti-corrosion agents, drape imparting agents, anti-static agents, ironing aids, colorants, pearlisers and / or opacifiers, and shading dye. Each of these ingredients will be present in an amount effective to accomplish its purpose. Generally, these optional ingredients are included individually at an amount of up to 5% (by weight based on the total weight of the diluted composition) and so adjusted depending on the dilution ratio with water.

[0064] The pH of the composition as measured at 25 °C using a pH meter is preferably in the range of 5 to 10 more preferably in the range of 6 to 8.

[0065] 15

[0066] Another aspect of the present invention relates to a method of delivering enhanced fragrance to a fabric comprising the step of contacting the fabric with a composition of the invention preferably diluted with water followed by the step of rinsing said fabric with water to make it substantially free of said composition.

[0067] 20 Preferably the process comprising treating the fabric with from 0.5 to 10 g / L, preferably from 1 to 8 g / L of an aqueous solution of the composition and allowing it to remain in contact with the fabric for from 5 minutes to 1 day, preferably from 5 minutes to 2 hours, then rinsing and drying the fabric.

[0068] 25 The invention will now be illustrated with the help of the following non-limiting examples

[0069] Examples

[0070] Examples A-E, 1 ,2: Effect of inclusion of the combination of actives as per the invention on fragrance impact

[0071] A base formulation as shown in Table -1 was prepared. Actives as shown in table -2 were included in the base formulation of Table -1 and the fragrance impact of the fabric washed with the composition of table - 2 was assessed using the procedure as given below.

[0072] Method for evaluating the intensity of fragrance from fabric using GC-MS:P0001101CPL

[0073] 8

[0074] 5cm x 5cm Nylon elastane swatches are used for the study. Around 1.4% of a representative fragrance compound D-Limonene is dissolved in the laundry liquid formulations. Cut de-sized swatches are washed in a dilution made from the laundry liquid. The swatches were added to the wash liquor at a dilution of 3 gpl. The wash conditions were: 25FH hardwater, liquor: cloth 5 ratio is 1:6, Ca: Mg ratio is 4:1, wash time 10mins, 2 rinses and 3gpl dilution. All these conditions were optimized based on an average consumer usage across regions.

[0075] As soon as the liquor was added to the tarsons, the lid was closed and the washing is done using a griffin shaker at 250-300 rpm, that would mimic a constant motion mimicking the realistic washing scenario. The wash liquor was drained after completion of main wash time. The 10 swatches were rinsed using 25FH hardwater twice for one minute each on the griffin shaker at 250-300rpm. The damp swatches were immediately transferred to 20ml glass vials and sealed immediately. The headspace of the vials were allowed to stabilize for a minimum of 30minutes, evaluation is done in triplicates using GCMS using an optimized headspace analysis method.

[0076] 15 Table -1

[0077]

[0078] Table - 2

[0079]

[0080] P0001101CPL

[0081]

[0082] “Base” in the above table refers to the base formulation as given in Table - 1.

[0083] Acusol 402 is a poly acrylic acid polymer (as in claim 1) which was sourced from Dow.

[0084] 5 The data in Table - 1 above indicates that compositions as per the invention (Example 1 and 2) provides for enhanced fragrance impact as compared to each of the individual ingredients. Different polymer, polyitaconic acid were used in the base formulation of Table - 1 and the fragrance impact obtained using the same procedure as described earlier is summarised in Table -3 below:

[0085] 10

[0086] Table - 3

[0087]

[0088] The data in Table - 3 above indicates that composition as per the invention (Example 3 ) with a different polymer delivers enhanced fragrance impact (similar to the data in Table - 2).

[0089] Different sequestrants (EDDS and IDS) were used in the base formulation of Table - 1 and the fragrance impact obtained using the same procedure as described earlier is summarised in Table -4 below:

[0090] 20P0001101CPL

[0091] 10

[0092] Table -4:

[0093]

[0094] The data in Table - 4 above indicates that compositions as per the invention (Example 4 and 5) with different sequestrants deliver enhanced fragrance impact (similar to the data in Table - 2 5 and 3).

Claims

P0001101CPL11Claims1. A liquid laundry composition comprising(i) a surfactant,(ii) a sequestrant selected from trisodium methyl glycine diacetate (MGDA), L-glutamic acid N, N-diacetic acid tetrasodium salt (GLDA), Tetra sodium iminosuccinic acid sodium (IDS), ethylene diamine diacetic acid (EDDA), ethylene diamine disuccinic acid (EDDS), capryl hydroxamic acid (CHA) or mixtures thereof,(iii) a fragrance compound;(iv) an anionic polymer ofFormula Iwhere x has a value from 20 to 200;y has a value from 0 to 200; andR is CH2COOH or H; and.(v) 40 to 90 wt% water.

2. A composition as claimed in claim 1 wherein the polymer is selected from polyacrylic acid, or polyitaconate.

3. A composition as claimed in claim 1 or 2 comprising 0.1 to 5 wt%, preferably 0.5 to 2 wt% anionic polymer.

4. A composition as claimed in any one of the preceding claims where the sequestrant is selected from MGDA, GLDA or mixtures thereof.

5. A composition as claimed in any one of the preceding claims comprising 0.01 to 5 wt% preferably 0.1 to 2 wt% sequestrant.

6. A composition as claimed in any one of the preceding claims comprising 3 to 30 wt%, preferably 8 to 25 wt% surfactant.P0001101CPL127. A composition as claimed in any one of the preceding claims wherein the surfactant is selected from an alcohol ethoxylate, alkyl ether sulfate and linear alkyl benzene sulfonate.

8. A composition as claimed in any one of the preceding claims having a pH of 5 to 10, preferably 6 to 8.

9. A composition as claimed in any one of the preceding claims comprising one or more enzymes.

10. A method of delivering enhanced fragrance to a fabric comprising the steps of treating the fabric with a 0.5 to 10 g / L, preferably from 1 to 8 g / L of an aqueous solution of a liquid laundry composition as claimed in any one of the preceding claims; allowing said composition to remain in contact with said fabric for from 5 minutes to 1 day, preferably from 5 minutes to 2 hours, followed by rinsing and drying the fabric.

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