A cleaning composition for delivering enhanced fragrance impact

Abstract

The present invention relates to a cleaning composition which has been found to deliver enhanced fragrance impact. Particularly, the present invention relates to a fabric cleaning composition or a fabric conditioning composition that ensures that the fabric, after it has been cleaned free of dirt, is seen to have enhanced fragrance for a long time after the cleaning process is complete. This is achieved by including two specific polysaccharides in a fabric cleaning / treatment composition which contains a fragrance.

Description

[0001] P0000976 CPL

[0002] 1

[0003] A CLEANING COMPOSITION FOR DELIVERING ENHANCED FRAGRANCE IMPACT

[0004] Field of the Invention

[0005] The present invention relates to a cleaning composition which has been found to deliver

[0006] 5 enhanced fragrance impact. Particularly, the present invention relates to a fabric cleaning composition or a fabric conditioning composition that ensures that the fabric, after it has been cleaned free of dirt, is seen to have enhanced fragrance for a long time after the cleaning process is complete.

[0007] Background of the Invention

[0008] Washing fabrics, also known as laundering or simply as laundry, makes up 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

[0009] 15 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 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

[0010] 20 may also be carried out by using machines; or simply by exposing the fabric to air, and if possible, under the sun.

[0011] During the rinsing steps, which may be with fresh water two or three times, often a fabric conditioning composition is added especially in the final rinse step to provide various benefits like

[0012] 25 anti yellowing, fabric conditioning, or antimicrobial benefits. Fabric conditioners were generally developed to deliver certain surface treatments to the fabric to ensure they are soft, smooth and free of static. The present invention relates to a composition that could be included in either the wash step or the rinsing step for delivering enhanced perfume impact in addition to making the fabric clean and free of stains.

[0013] 30

[0014] The present inventors in seeking to solve the above problem have hit upon a combination of two specific polysaccharides which when included in a fabric cleaning composition delivers enhanced fragrance impact for a long time after the fabric has been cleaned and dried. P0000976 CPL

[0015] 2

[0016] It is therefore an object of the present invention to provide for a fabric treatment composition that delivers enhanced fragrance impact.

[0017] Summary of the Invention

[0018] 5 The first aspect of the present invention relates to a cleaning composition for delivering enhanced fragrance impact comprising

[0019] (i) a first polysaccharide selected from algin or pectin;

[0020] (ii) a second polysaccharide selected dextrin or resistant dextrin;

[0021] (iii) a fabric treatment active selected from one or both of a surfactant or a fabric softening active; and

[0022] (iv) a fragrance; wherein the first polysaccharide is pectin; and wherein the second polysaccharide is resistant dextrin.

[0023] According to another aspect of the present invention there is provided a method of delivering

[0024] 15 fragrance impact on fabric for up to five days comprising the step of contacting the fabric pre-wet with water with a composition of the first aspect; followed optionally by the steps of rinsing with water; and then drying.

[0025] Detailed Description of the Invention

[0026] 20 For the avoidance of doubt, any feature of one aspect of the present invention may be utilised in 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

[0027] 25 options need not be exhaustive. Whenever the words "including" or "having" are used, these 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,

[0028] 30 physical properties of materials and / or use are to be understood as modified by the word "about". 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. P0000976 CPL

[0029] 3

[0030] 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%”.

[0031] The composition of the invention comprises a first polysaccharide selected from one or both of

[0032] 5 algin and pectin.

[0033] Alginic acid, also called algin, is a polysaccharide distributed widely in the cell walls of brown algae that is hydrophilic and forms a viscous gum when hydrated. Alginic acid is a linear copolymer with homopolymeric blocks of (1 — 4)-linked p-D-mannuronate (M) and a-L- guluronate (G) residues, respectively, covalently linked together in different sequences or blocks. The monomers may appear in homopolymeric blocks of consecutive G-residues (G-blocks), consecutive M-residues (M-blocks) or alternating M and G-residues (MG-blocks). a-L-guluronate is the C-5 epimer of p-D-mannuronate. Alginates are refined from brown seaweeds. Throughout the world, many of the Phaeophyceae class brown seaweeds are harvested to be processed and

[0034] 15 converted into sodium alginate and alginic acid.

[0035] Pectin is a structural acidic heteropolysaccharide contained in the primary and middle lamella and cell walls of terrestrial plants. Its main component is galacturonic acid, a sugar acid derived from galactose. It is produced commercially as a white to light brown powder, mainly

[0036] 20 extracted from citrus fruits, and is used in food as a gelling agent, particularly in jams and jellies. It is also used in dessert fillings, medicines, sweets, as a stabiliser in fruit juices and milk drinks, and as a source of dietary fibre. Pectin also known as pectic polysaccharides, are rich in galacturonic acid. Several distinct polysaccharides have been identified and characterised within the pectic group. Homogalacturonans are linear chains of a-(1— 4)-linked D-galacturonic acid.

[0037] 25 Substituted galacturonans are characterised by the presence of saccharide appendant residues (such as D-xylose or D-apiose in the respective cases of xylogalacturonan and apiogalacturonan) branching from a backbone of D-galacturonic acid residues. Rhamnogalacturonan pectins (RG- I) contain a backbone of the repeating disaccharide: 4)-a-D-galacturonic acid-(1 ,2)-a-L- rhamnose-(1. From many of the rhamnose residues, sidechains of various neutral sugars branch

[0038] 30 off. The neutral sugars are mainly D-galactose, L-arabinose and D-xylose, with the types and proportions of neutral sugars varying with the origin of pectin. Another structural type of pectin is rhamnogalacturonan II (RG-II), which is a less frequent, complex, highly branched polysaccharide. P0000976 CPL

[0039] 4

[0040] Pectin is the first polysaccharide for inclusion in the composition of the invention. Pectin when included is preferably derived from one or more of a fruit chosen from pear, apple, guava, plum, gooseberry, orange or any other citrus fruit, preferably citrus. It is preferably from apple or citrus fruit.

[0041] 5

[0042] Pectin consists predominantly of a-D galacturonic acid units, but also contains some amount of neutral sugars such as rhamnose, xylose, arabinose, galactose and glucose.

[0043] The percentage of galacturonic acid units is therefore the amount of galacturonic acid groups present relative to the total amount of the pectin. The galacturonic acid content of a sample can be determined by methods known in the art, such as for example the Saeman hydrolysis method (Englyst and Cummings (Analyst, 109(7), 937-942 (1984), Filisetti-Cozzi and Carpita (Analytical Biochemistry, 197, 157-162 (1991)).

[0044] Galacturonic acid typically has the following repeat unit structure:

[0045] It is possible to esterify galacturonic acids on the carboxylic acid group. The percentage of esterified units is called the degree of esterification (DE). The degree of esterification can be determined according to methods known in the art, such as the base titration method (Shultz, 1965) as proposed by the Food Chemical Codex (FCC (1981). 3rd ed., (1981) National Academy

[0046] 20 of Science, Washington, DC), quantification of methanol released during de-esterification using gas chromatography (GC) (Walter et al. (1983), Journal of Food Science, 48: 1006-10070), colorimetry (Hou et al. (1999), Botanical Bulletin of Academia Sincia, 40:115-119), high performance liquid chromatography (HPLC) (Levigne S., et al. (2002), Food Hydrocolloids 16: 547-550), nuclear magnetic resonance (NMR) (Rosenbohm et al. (2003) Carbohydrate Research,

[0047] 25 338: 637-649) and capillary zone electrophoresis (CZE) (Williams et al. (2003), Journal of Agricultural Food and Chemistry, 51 : 1777-1781).

[0048] A method to separate pectin into fractions with different DE is described, for example, by Strom, et al. (2005), Carbohydrate Polymers, Volume 60, Issue 4, 20 June 2005, Pages 467-473. P0000976 CPL

[0049] 5

[0050] In nature, the carboxylic groups are typically methylated to varying degrees to provide pectin methyl esters. The number fraction of carboxylic acid groups methylated is known as the degree of methyl esterification.

[0051] 5 The pectin used in the composition of the present invention preferably has a degree of methyl esterification higher than 50 wt%, more preferably 52.5 wt% or higher, further more preferably 55 wt% or higher, yet more preferably 57.5 wt% or higher and yet further more preferably 60 wt% or higher, and most preferably 62.5wt% or higher.

[0052] 10 The pectin used according to the invention preferably has a molecular weight of higher than 50kDa, preferably higher than 100kDa, more preferably higher than 150 kDa. Typical upper limits of pectin molecular weights are of the order of 1000kDa, more preferably 800kDa. Thus, the pectin for use in the composition of the invention has a molecular weight of between 50 kDa and 1000kDa.

[0053] 15

[0054] The molecular weight of the pectin used in the present invention is determined using Triple Detection Size Exclusion Chromatography (TD-SEC)

[0055] The analysis is conducted using the Malvern OMNISEC system. The complete OMNISEC system consists of OMNISEC RESOLVE (chromatography module) and OMNISEC REVEAL (detectors

[0056] 20 module). Using multi-detector technologies, it combines refractive index, absorbance, light scattering and viscometer detectors to measure concentration, molecular weight and other parameters. The data are analysed using the OMNISEC software.

[0057] Depending on the molecular weight of the polysaccharide, appropriate aqueous columns such as the A6000 and A7000 set of columns and the corresponding guard columns are used. Depending

[0058] 25 on the nature of the polysaccharide to be analysed (whether they have anionic, neutral or cationic functional groups), routinely used eluents of choice are demineralised water containing 0.02wt% Na azide as the preservative or buffer solutions such as Na or Li nitrate (0.05-0.1 M), buffered to the appropriate pH range using NaOH or acetic acid. Polysaccharides with hydrophobic functionality can be analysed using 10-20% MeOH.

[0059] 30 Depending on the molecular weight range of the polysaccharides, typical sample solutions are prepared at 0.5mg / ml and then filtered using 0.45pm Nylon filters prior to dispensing into sample vials. The eluent is filtered using a 0.2 pm Nylon filter. The flow rate throughout all runs is typically at 1ml / min; the detector and column oven temperatures are set to 40°C.

[0060] 35 The detector calibration is carried out using a narrow molecular weight standard to calculate the P0000976 CPL

[0061] 6 detector offsets, the detector constants for all detectors and the band broadening and tailing corrections. The calibration is performed using a standard of known concentration, molecular weight, dispersity and intrinsic viscosity; in this case the narrow molecular weight standard of choice usually is a Pullulan standard material.

[0062] 5 A verification standard is also run with every sequence. This standard is usually a broad (polydisperse) standard, whose properties are known and can be measured. This independently verifies that the calculation method has been correctly calibrated. For polysaccharide analyses, a Dextran 73KDa material is chosen.

[0063] For accuracy (and also to allow for the possibility of sample impurities being present), a fixed dn / dc method is used to calculate the molecular weight data for all samples assuming a dn / dc of 0.147.

[0064] The composition of the invention comprises a second polysaccharide selected from one or both of a dextrin and a resistant dextrin. Dextrin is preferably prepared by partial hydrolysis of starches from corn, potato, arow root, tapioca starch or wheat. The hydrolysis may be by thermal or

[0065] 15 enzymatic means. Dextrin is a combination of D-glucose units linked through a(1 - 4) or a(1 - 6) glycosidic bonds. Dextrin generally has the chemical formula (CeHioOsjn. A preferred dextrin is one having CAS No. 9004-53-9. It generally has a pH in the range of 4 to 5 when a 20% solution is measured at 25 °C. It is usually sold as a pale yellow powder which is odourless. The power usually has a particle size in the range of 100 to 200 .m. It is soluble in water at 20 °C. The

[0066] 20 viscosity is low since a 50% solution in water at 20 °C is measured to have a value in the range of about 50 to 200 mPa.s. A preferred supplier of dextrin is Roquette Freres, France who sell it under the brand name NutrioseRFB 06.

[0067] The second polysaccharide may be resistant dextrin. Resistant dextrin is also known by some

[0068] 25 as digestion resistant maltodextrin. It is usually prepared by highly controlled partial hydrolysis of corn, potatoes, barley or wheat, preferably from corn starch. It usually contains 3 to 20 D- glucose units that are linked by a(1 -4), a(1 -6), p(1 -4) and p(1 -6) glycosidic bond. It is also reported to contain some 1 ,2 and 1 ,3 glycosidic bonds. It usually has the chemical formula C6nH( n+2)O(5n+i) or (C6HioOs)n where ‘n’ represents the number of glucose units linked together. It is usually sold as an off-white powder which is odourless. It is soluble in water. A preferred supplier of resistant dextrin is ADM Bio Science & Technology (Tianjin) Co. Ltd., Tianjin, China who sell it under the brand name FibersolRor FibersolR2.

[0069] For the sake of clarity, the resistant dextrin referred herein is not what is generally known as maltodextrin (or digestible maltodextrin) which predominantly contains only a(1-4) glycosidic

[0070] 35 bonds. P0000976 CPL

[0071] 7

[0072] The second polysaccharide is preferably included in 0.01 to 5%, more preferably 0.05 to 4%, further more preferably 0.1 to 3% by weight of the composition. The second polysaccharide is resistant dextrin.

[0073] 5 It is preferred that the weight ratio of the first polysaccharide and the second polysaccharide is in the range of 1 :2 to 1 :6, preferably in the range of 1 :3 to 1 :5.

[0074] The cleaning composition of the invention comprises a fragrance. Fragrance 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 components may comprise odiferous materials and / or pro-fragrance materials. The cleaning composition preferably comprises 0.1 to 15 wt.% perfume, more preferably 0.5 to 8 wt. % free perfume.

[0075] Particularly preferred perfume components are blooming perfume components and substantive perfume components. Blooming perfume components are defined by a boiling point less than

[0076] 15 250°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.

[0077] 20

[0078] It is commonplace for a plurality of perfume components to be present in a cleaning composition. In the compositions for use in the present invention it is envisaged that there will be three or more, preferably four or more, more preferably five or more, most preferably six or more different perfume components. An upper limit of 300 perfume components may be applied.

[0079] 25

[0080] The perfume may be included in the cleaning composition of the invention through perfume microcapsules, although delivery through a perfume microcapsule is not necessary for obtaining the benefits of the invention.

[0081] 30 The composition of the invention preferably comprises a hydrotrope. Suitable hydrotropes for inclusion in the composition of the invention are one or more of an alkali metal cumene sulphonate, alkali metal xylene sulphonate, polyethylene glycol (PEG), mono propylene glycol (MPG), and dipropylene glycol (DPG). The preferred alkali metal cumene sulphonate is sodium cumene sulphone (SOS). The preferred alkali metal xylene sulphonate is sodium xylene P0000976 CPL

[0082] 8 sulphonate (SXS). The most preferred hydrotrope for use in the present invention is one or both of SCS and MPG. The composition preferably comprises 0.05% to 5 wt%, more preferably 0.1 to 4 wt% hydrotrope.

[0083] 5 It is especially preferred that the composition of the invention includes a preservative.

[0084] The composition of the invention comprises a fabric treatment active selected from one or both of a surfactant or a fabric softening active. When the composition of the invention is delivered to wash and clean fabric as in a laundry detergent composition, the fabric treatment active is a surfactant.

[0085] The composition when delivered as a laundry detergent composition preferably includes 1 to 80% surfactant. Laundry detergent composition may be delivered in the form of a solid or as a liquid of which the liquid form is more preferred. A preferred aspect relates to a laundry detergent composition which comprises 5 to 60% anionic surfactant.

[0086] 15

[0087] The solid laundry compositions herein can take a variety of physical solid forms including forms such as powder, granule, ribbon, noodle, paste, tablet, flake, pastille and bar, and preferably the composition is in the form of powder, granule or a bar. The composition according to the present invention may be made via a variety of conventional methods known in the art including dry¬

[0088] 20 mixing, compaction such as agglomerating, extrusion, tabletting, or spray-drying of the various compounds comprised in the detergent component, or combinations of these techniques. The powder or granule compositions preferably have a density of more than 350 grams / litre, more preferably more than 450 grams / litre or even more than 570 grams / litre.

[0089] 25 Typical solid laundry detergent compositions comprise one or more of surfactants chosen from anionic, nonionic, zwitterionic, cationic, amphoteric types, preferably it is of the anionic type. These compositions in solid form typically comprise from 2 to 30% by weight surfactants. They may also comprise other adjuvents to provide benefits to the fabric being washed e.g soil release polymers and antiredeposition polymers which together may be included in 0 to 5% by weight of

[0090] 30 the composition. Builders are generally included especially to counteract the ill effects of hardness of water being used to wash the fabric and these account for up to 50% typically 10 to 30% by weight of the composition. Other fabric benefit agents like shading dyes and optical brightener may be included in up to 1 % by weight of the composition. Bleaches may sometimes P0000976 CPL

[0091] 9 be included and when it is included it accounts for up to 10% by weight of the composition and fillers generally account for up to 40% by weight of the composition.

[0092] The solid laundry detergent composition according to the present invention preferably has a pH from 7.0 to 10.5, preferably 7.0 to 10.2, still preferably from 8.5 to 10.2, when measured at 1 wt.%

[0093] 5 dilution in de-ionised water at 25°C. The composition may preferably include a buffer.

[0094] The laundry detergent composition in which the present invention may be delivered 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

[0095] 10 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. Preferably, the composition comprises at least 50% wt. water and more preferably at least 70% wt. water. Water is generally present in an amount of 20% to 99.9% preferably from 40% to 80% by weight of the composition.

[0096] 15 Liquid laundry detergent compositions generally comprise 5 to 60% and preferably from 10 to 40% by weight of one or more surfactants. The surfactant is generally anionic in nature. Preferred anionic surfactants are of the organic 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

[0097] 20 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, and preferably contain one to three ethylene 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

[0098] 25 monoethanolamine, (MEA) diethanolamine (DEA) or triethanolamine (TEA). Mixtures of such counterions may also be employed. Sodium and potassium are preferred.

[0099] Most preferred surfactants are of the alkylbenzene sulfonates type, particularly linear alkylbenzene sulfonates (LAS) with an alkyl chain length of from 10 to 18 carbon atoms. Some

[0100] 30 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.

[0101] Preferably, the composition comprises from 1 to 20%, more preferably 5 to 20 wt% non-ionic surfactant based on the total weight of composition. A preferred class of nonionic surfactant for

[0102] 35 use in the invention includes aliphatic Cs to Cis, more preferably C12 to C15 primary linear alcohol P0000976 CPL

[0103] 10 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 C16 / 18 Alcohol ethoxylates.

[0104] Liquid laundry detergent compositions also generally comprise agents like soil release polymers,

[0105] 5 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 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, 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.

[0106] 15 The liquid laundry detergent composition of the invention may contain one or more cosurfactants (such as amphoteric (zwitterionic) and / or cationic surfactants) in addition to the non-soap anionic and / or nonionic detersive surfactants described above. Such cosurfactant, when included, may be present in an amount ranging from 0.1 to 5% by weight of the composition.

[0107] 20 The liquid laundry detergent composition may also optionally contain relatively low levels of organic detergent builder or sequestrant material. Examples include the alkali metal citrates, succinates, malonates, carboxymethyl succinates, carboxylates, polycarboxylates aminocarboxylates and polyacetyl carboxylates. If utilized, the organic builder materials may comprise from about 0.5 percent to 20 wt percent, preferably from 1 wt percent to 10 wt percent,

[0108] 25 of the composition.

[0109] When the composition of the invention is delivered as a fabric conditioner composition, the fabric treatment active is a fabric softening active. Fabric conditioner composition generally comprises 1 to 50 wt. %, preferably 1.5 to 30 wt.% and more preferably 2 to 20 wt. % fabric softening active

[0110] 30 by weight of the composition. The fabric softening actives may be any material known to soften fabrics. These may be polymeric materials or compounds known to soften materials. Examples of suitable fabric softening actives include: quaternary ammonium compounds, silicone polymers, clays, amines, fatty esters, dispersible polyolefins, polymer latexes and mixtures thereof. P0000976 CPL

[0111] 11

[0112] The fabric softening actives may preferably be cationic or non-ionic materials. Preferably, the fabric softening actives of the present invention are cationic materials. Suitable cationic fabric softening actives are described herein.

[0113] 5 The preferred softening actives for use in fabric conditioner compositions of the invention are quaternary ammonium compounds (QAC).

[0114] The QAC preferably comprises at least one chain derived from fatty acids, more preferably at least two chains derived from a fatty acids. Generally fatty acids are defined as aliphatic monocarboxylic acids having a chain of 4 to 28 carbons. Fatty acids may be derived from various sources such as tallow or plant sources. Preferably the fatty acid chains are derived from plants. Preferably the fatty acid chains of the QAC comprise from 10 to 50 wt. % of saturated C18 chains and from 5 to 40 wt. % of monounsaturated C18 chains by weight of total fatty acid chains. In a further preferred embodiment, the fatty acid chains of the QAC comprise from 20 to 40 wt. %,

[0115] 15 preferably from 25 to 35 wt. % of saturated C18 chains and from 10 to 35 wt. %, preferably from 15 to 30 wt. % of monounsaturated C18 chains, by weight of total fatty acid chains.

[0116] The preferred quaternary ammonium fabric softening actives for use in compositions of the present invention are ester linked quaternary ammonium compounds or so called "ester quats".

[0117] 20

[0118] Particularly preferred materials are the ester-linked triethanolamine (TEA) quaternary ammonium compounds comprising a mixture of mono-, di- and tri-ester linked components.

[0119] Typically, TEA-based fabric softening compounds comprise a mixture of mono, di- and tri ester

[0120] 25 forms of the compound where the di-ester linked component comprises no more than 70 wt.% of the fabric softening compound, preferably no more than 60 wt.% e.g. no more than 55%, or even no more that 45% of the fabric softening compound and at least 10 wt.% of the monoester linked component.

[0121] 30 A first group of quaternary ammonium compounds (QACs) suitable for use in the present invention is represented by formula (I): P0000976 CPL

[0122] [(CH;)rl(TR)]m wherein each R is independently selected from a C5 to C35 alkyl or alkenyl group; R1 represents a C1 to C4 alkyl, C2 to C4 alkenyl or a C1 to C4 hydroxyalkyl group; T may be either O-CO. (i.e. an ester group bound to R via its carbon atom), or may alternatively be CO-O (i.e. an ester group

[0123] 5 bound to R via its oxygen atom); n is a number selected from 1 to 4; m is a number selected from 1 , 2, or 3; and X- is an anionic counter-ion, such as a halide or alkyl sulphate, e.g. chloride or methylsulfate. Di-esters variants of formula I (i.e. m = 2) are preferred and typically have mono- and tri-ester analogues associated with them. Such materials are particularly suitable for use in the present invention.

[0124] Also suitable are actives rich in the di-esters of triethanolammonium methylsulfate, otherwise referred to as "TEA ester quats".

[0125] A second group of QACs suitable for use in the invention is represented by formula (II):

[0126] (R NHCH?CH-TR?X- (ir)

[0127] 15 wherein each R1 group is independently selected from C1 to C4 alkyl, hydroxyalkyl or C2 to C4 alkenyl groups; and wherein each R2 group is independently selected from C8 to C28 alkyl or alkenyl groups; and wherein n, T, and X- are as defined above.

[0128] 20 Preferred materials of this second group include 1 ,2 bis[tallowoyloxy]-3- trimethylammonium propane chloride, 1 ,2 bis[hardened tallowoyloxy]-3- trimethylammonium propane chloride, 1 ,2- bis[oleoyloxy]-3-trimethylammonium propane chloride, and 1 ,2 bis[stearoyloxy]-3- trimethylammonium propane chloride. Such materials are described in US 4, 137,180 (Lever Brothers). Preferably, these materials also comprise an amount of the corresponding mono-ester.

[0129] 25 A third group of QACs suitable for use in the invention is represented by formula (III): P0000976 CPL wherein each R1 group is independently selected from C1 to C4 alkyl, or C2 to C4 alkenyl groups; and wherein each R2 group is independently selected from C8 to C28 alkyl or alkenyl groups; and n, T, and X- are as defined above. Preferred materials of this third group include bis(2- tallowoyloxyethyl)dimethyl ammonium chloride, partially hardened and hardened versions

[0130] 5 thereof.

[0131] A particular example of the third group of QACs is represented the by the formula:

[0132] A fourth group of QACs suitable for use in the invention are represented by formula (V)

[0133] R1 and R2 are independently selected from C10 to C22 alkyl or alkenyl groups, preferably C14 to C20 alkyl or alkenyl groups. X- is as defined above.

[0134] The iodine value of the quaternary ammonium fabric conditioning material is preferably from 0 to

[0135] 15 80, more preferably from 0 to 60, and most preferably from 0 to 45. The iodine value may be chosen as appropriate. Essentially saturated material having an iodine value of from 0 to 5, preferably from 0 to 1 may be used in the compositions of the invention. Such materials are known as "hardened" quaternary ammonium compounds.

[0136] 20 A further preferred range of iodine values is from 20 to 60, preferably 25 to 50, more preferably from 30 to 45. A material of this type is a "soft" triethanolamine quaternary ammonium compound, preferably triethanolamine di-alkylester methylsulfate. Such ester-linked triethanolamine quaternary ammonium compounds comprise unsaturated fatty chains.

[0137] 25

[0138] A further type of softening compound may be a non-ester quaternary ammonium material represented by formula (VI): P0000976 CPL

[0139] 14 wherein each R1 group is independently selected from C1 to C4 alkyl, hydroxyalkyl or C2 to C4 alkenyl groups; R2 group is independently selected from C8 to C28 alkyl or alkenyl groups, and X- is as defined above.

[0140] 5

[0141] The fabric conditioner composition preferably comprises one or more cationic polymers more preferably 0.1 to 10 wt. % cationic polymer by weight of the formulation, even more preferably 0.2 to 7.5 wt. %, and most preferably 0.3 to 5 wt. % cationic polymer by weight of the formulation.

[0142] Cationic polymer refers to polymers having an overall positive charge. The cationic polymer may be naturally derived or synthetic. Examples of suitable cationic polymers include: acrylate polymers, cationic amino resins, cationic urea resins, cationic proteins and cationic polysaccharides.

[0143] 15 Preferably the cationic charge of the cationic polymer is provided by the incorporation a quaternary ammonium salt. In other words, preferably the cationic polymer comprises a quaternary ammonium group. Preferably the quaternary ammonium salt is linked to the polysaccharide backbone by a hydroxyethyl or hydroxypropyl group. Preferably the charged nitrogen of the quaternary ammonium salt has one or more alkyl group substituents.

[0144] 20

[0145] The counterion of the cationic polymer is freely chosen from the halides: chloride, bromide, and iodide; or from hydroxide, phosphate, sulphate, hydrosulphate, ethyl sulphate, methyl sulphate, formate, and acetate.

[0146] 25 The molecular weight of the cationic polymer is preferably greater than 20 000 g / mol, more preferably greater than 25 000 g / mol. The molecular weight is preferably less than 2 000 000 g / mol, more preferably less than 1 000 000 g / mol.

[0147] Polysaccharide based cationic polymers include cationic celluloses, cationic guars and cationic

[0148] 30 starches. Polysaccharides are polymers made up from monosaccharide monomers joined together by glycosidic bonds. P0000976 CPL

[0149] 15

[0150] Examples of suitable polysaccharide polymers are salts of hydroxyethyl cellulose reacted with trimethyl ammonium substituted epoxide, referred to in the field under the International Nomenclature for Cosmetic Ingredients as Polyquatemium 10 and is commercially available from

[0151] 5 the Amerchol Corporation, a subsidiary of The Dow Chemical Company, marketed as the Polymer LR, JR, and KG series of polymers.

[0152] Other suitable cationic polymers include Polyquatemium 24, cocodimethylammonium hydroxypropyl oxyethyl cellulose, lauryldimethylammonium hydroxypropyl oxyethyl cellulose, stearyldimethylammonium hydroxypropyl oxyethyl cellulose, and stearyldimethylammonium hydroxyethyl cellulose; cellulose 2-hydroxyethyl 2- hydroxy 3-(trimethyl ammonio) propyl ether salt, polyquaternium-4, polyquaternium-10, polyquaternium-24, polyquaternium-37 and polyquaternium-67 or mixtures thereof.

[0153] 15 Non-polysaccharide-based cationic polymers are comprised of structural units, these structural units may be non-ionic, cationic, anionic or mixtures thereof. The polymer may comprise noncationic structural units, but the polymer must have a net cationic charge.

[0154] The cationic polymer may comprise a nonionic structural units derived from monomers selected

[0155] 20 from: (meth)acrylamide, vinyl formamide, N, N-dialkyl acrylamide, N, N-dialkylmethacrylamide, 01-012 alkyl acrylate, 01-012 hydroxyalkyl acrylate, polyalkylene glyol acrylate, 01-012 alkyl methacrylate, 01-012 hydroxyalkyl methacrylate, polyalkylene glycol methacrylate, vinyl acetate, vinyl alcohol, vinyl formamide, vinyl acetamide, vinyl alkyl ether, vinyl pyridine, vinyl pyrrolidone, vinyl imidazole, vinyl caprolactam, and mixtures thereof.

[0156] 25

[0157] The cationic polymer may comprise a cationic structural units derived from monomers selected from: N, N-dialkylaminoalkyl methacrylate, N, N-dialkylaminoalkyl acrylate, N, N-dialkylaminoalkyl acrylamide, N, N-dialkylaminoalkylmethacrylamide, methacylamidoalkyl trialkylammonium salts, acrylamidoalkylltrialkylamminium salts, vinylamine, vinylimine, vinyl imidazole, quaternized vinyl imidazole, diallyl dialkyl ammonium salts, and mixtures thereof.

[0158] Preferably, the cationic monomer is selected from: diallyl dimethyl ammonium salts (DADMAS), N, N-dimethyl aminoethyl acrylate, N,N-dimethyl aminoethyl methacrylate (DMAM), [2- (methacryloylamino)ethyl]trl-methylammonium salts, N, N-dimethylaminopropyl acrylamide

[0159] 35 (DMAPA), N, N-dimethylaminopropyl methacrylamide (DMAPMA), acrylamidopropyl trimethyl P0000976 CPL

[0160] 16 ammonium salts (APTAS), methacrylamidopropyl trimethylammonium salts (MAPTAS), quaternized vinylimidazole (QVi), and mixtures thereof.

[0161] The cationic polymer may comprise anionic structural units derived from monomers selected

[0162] 5 from: acrylic acid (AA), methacrylic acid, maleic acid, vinyl sulfonic acid, styrene sulfonic acid, acrylamidopropylmethane sulfonic acid (AMPS) and their salts, and mixtures thereof.

[0163] Some cationic polymers disclosed herein will require stabilisers i.e. materials which will exhibit a yield stress in the ancillary laundry composition of the present invention. Such stabilisers may be selected from: thread like structuring systems for example hydrogenated castor oil or trihydroxystearin e.g. Thixcin ex. Elementis Specialties, crosslinked polyacrylic acid for example Carbopol ex. Lubrizol and gums for example carrageenan.

[0164] Preferably the cationic polymer is selected from; cationic polysaccharides and acrylate polymers.

[0165] 15

[0166] The fabric conditioner compositions described herein may preferably additional ingredients as will be known by the person skilled in the art. A non-limiting list of such ingredients include: solvents, antifoams, insect repellents, shading or hueing dyes, preservatives (e.g. bactericides), anti microbial agents, pH buffering agents, perfume carriers, additional malodor ingredients, dye

[0167] 20 transfer inhibitors, hydrotropes, anti-redeposition agents, soil-release agents, polyelectrolytes, anti-wrinkle agents, oils (e.g. plant based oils and mineral oils), plant extracts, waxes, sugaresters, anti-oxidants, dyes, colorants, sunscreens, anti-corrosion agents, anti-static agents, sequestrants and silicones.

[0168] 25 The fabric conditioner composition is preferably aqueous, preferably comprises water, more preferably at least 60 wt.% water, even more preferably 70 wt.% water. The compositions preferably comprise less than 98 wt.% water, more preferably less than 95 wt.% water.

[0169] In certain embodiments, ancillary or top-up compositions may be applied subsequent to a primary

[0170] 30 wash cycle, either in conjunction with or independent of a fabric conditioning composition. When such ancillary compositions comprise polysaccharides as per the invention, the efficacy in facilitating fragrance deposition is modulated by the surfactant system present within the formulation. It has been observed that use of a surfactant system wherein the weight ratio of anionic to nonionic surfactant is at least 1 , enhances the fragrance impact. P0000976 CPL

[0171] 17

[0172] Furthermore, the presence of higher amounts of anionic or cationic surfactants as compared to non-ionic surfactants in any composition as per the invention has been found to be advantageous for promoting enhanced fragrance deposition.

[0173] 5 The present invention also relates to a method of delivering fragrance impact on fabric for up to five days comprising the step of contacting the fabric pre-wet with water with a composition of the first aspect; followed optionally by the steps of rinsing with water; and then drying.

[0174] The invention will now be illustrated with the help of the following non-limiting examples.

[0175] 10 Examples

[0176] Examples A-C, 1 : Impact of inclusion of pectin and resistant dextrin on the fragrance score when included in a fabric conditioning composition:

[0177] A fabric conditioning composition (Example A) as shown in Table -1 below was taken.

[0178] Table - 1 :

[0179] Other actives as given in Table - 2 below were included in the fabric conditioning composition (fabcon) of Table -1. They were then used for washing the fabric using the procedure as given below. The average fragrance score measured using the method as given below is also given in

[0180] 20 the table -2.

[0181] Wash Cycle 1 : 100% cotton terry towels were soaked in 3gpl laundry detergent for 18 minutes, scrubbed with a laundry brush (10 strokes each from top to bottom and 10 strokes from left to right) and rinsed twice in 24 FH hard water.

[0182] This cycle of washing in laundry detergent and rinsing was repeated for 10 wash cycles. P0000976 CPL

[0183] 18

[0184] During the 10thwash cycle, in the second rinse stage, the fabric conditioner was added to the rinse water and fabrics were rinsed in it. The water was removed by wringing the towels and line dried indoor. Dried fabrics were evaluated for fragrance intensity on fabric by a naive panel by sniffing them. Scores were given from 0 to 5, 5 being strongest fragrance and 0 being no 5 fragrance on towels.

[0185] Table -2:

[0186] Pectin used in Table -2 above was 0.5% from CP Kelco (supplier) which has a degree of 10 methylation of >65%.

[0187] Fibersol used was Fibersol2 from ADM

[0188] The data in the table - 2 above indicates that the combination of pectin and resistant dextrin (Example -1) gives enhanced perfume impact even after 48 hours post wash as compared to the 15 same total amount of individual polysaccharide in the fabric conditioning composition (Example B and C).

Claims

P0000976 CPL19Claims1. A cleaning composition for delivering enhanced fragrance impact comprising(i) a first polysaccharide selected from algin or pectin;(ii) a second polysaccharide selected dextrin or resistant dextrin;(iii) a fabric treatment active selected from one or both of a surfactant or a fabric softening active; and(iv) a fragrance; wherein the first polysaccharide is pectin; and wherein the second polysaccharide is resistant dextrin.

2. The composition as claimed in any one of the preceding claims wherein the first polysaccharide is present in a concentration of 0.01 to 5 % by weight of the composition.

3. The composition as claimed in any one of the preceding claims wherein the second polysaccharide is present in a concentration of 0.01 to 5 % by weight of the composition.

4. The composition as claimed in any one of the preceding claims wherein the pectin is derived from one or more of a fruit selected from pear, apple, guava, plum, gooseberry, orange and any other citrus fruit, preferably citrus fruit.

5. The composition as claimed in any one of the preceding claims wherein the weight ratio of first polysaccharide and the second polysaccharide is in the range of 1:2 to 1 :6.

6. The composition as claimed in any one of the preceding claims which is a laundry detergent composition comprising 1 to 80 wt% surfactant.

7. The composition as claimed in any one of the preceding claims 1 to 6 which is a fabric conditioning composition comprising 1 to 50% of a fabric softening active.

8. The fabric conditioning composition as claimed in claim 7 wherein the fabric softening active is a quaternary ammonium compound.

9. The fabric conditioning composition as claimed in claim 7 or 8 comprising 0.1 to 10 wt% of a cationic polymer.P0000976 CPL2010. A method of delivering fragrance impact on fabric for up to five days comprising the step of contacting the fabric pre-wet with water with a composition as claimed in any one of the preceding claims; followed optionally by the steps of rinsing with water; and then drying.

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