Classifications

• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/16—Organic compounds
  • C11D3/38—Products with no well-defined composition, e.g. natural products
  • C11D3/382—Vegetable products, e.g. soya meal, wood flour, sawdust

Definitions

• the present invention relates to fabric conditioning compositions comprising micro powders of botanical origin.
• US2003/0087788 discloses water dispersible granules comprising a hydrophobic fragrance in the form of droplets, which is finely divided in and encapsulated by a water-soluble/dispersible solid organic matrix, which may be polypeptides of plant or synthetic origin, such as soya or wheat.
• EP0908171 (Gem Energy Industry Ltd) discloses a dry powder herbal cleaning composition containing (a) a herb which acts as a soap or detergent; (b) a herb which acts as a foaming accelerating agent; (c) a herb which acts as a foaming agent; (d) a herb which acts as a pigmentation or colour restoring or maintenance agent; and (e) a herb which acts as a conditioner.
• WO00/77153 discloses a detergent tablet containing (a) particles which contain organic surfactant and detergency builder, and (b) water insoluble but water swellable particles of plant material which contain both cellulose and lignin, such as coconut husk, obtainable by fragmentation of plant material without separation of its fibres into a liquid dispersion.
• US 5,840,669 A relates to a herbal dry cleaning powder based on a mixture of Cocoa nucifera, Hibiscus Rosa sinesis, Sapindus trifoliatus, Trigonella foenum graeceum, Melia azadirachta, of botanical origin, in combination with a preservative.
• the constituents can be crushed to a mesh size of from 150-350.
• WO 2007/009621 A relates to a softening particle having an oil in polymer matrix comprising a polysaccharide which is preferably carrageenan or alginate based; the former being obtained from red seaweed.
• US 2004/110652 A1 concerns a particulate detergent composition which comprises a herbal extract beneficial to human skin, absorbed onto or into a granular clay carrier.
• WO 2007/147698 A discloses a granular laundry detergent composition comprising from 2 to 70 wt % of surfactant, form 2 to 40 wt % of sodium carbonate and from 5 to 80 wt % of a base treated insoluble agricultural plant by-product.
• the plant by-products are organic insoluble remnants of plant material grown as animal food and waste products from natural materials used to make consumer goods, but does not include starch.
• US 2002/119904 A1 provides a tablet of compacted particulate cleaning composition comprising at least one cleaning ingredient and a cellulosic material from a plant source other then timber or plant material which contains both cellulose and lignin, in combination with a carrier material.
• US 5 898 026 A relates to a liquid crystal composition
• a liquid crystal composition comprising a water insoluble organic compound, a non-ionic surfactant, wood particles an ethoxylated alkyl ether sulphate surfactant, a cosurfactant and water.
• micronised powders of botanical origin can be deposited onto fabrics from a laundry rinse product to impart fabrics with benefit agents or for novel fragrance enhancement.
• powders include ginger for fragrance; lime, lemon or orange rind for freshness; flower petals for perfume; exfoliating agents such as oat kernel flour, rice or rice bran flour; various pigments of natural origin, such as turmeric powder for anti-inflammatory benefit; seed derivatives such as cardamom and coriander for perfuming; various dried herbs such as mint, oregano, green tea, bay leaf and tea-tree for perfuming and anti-microbial benefits.
• the present invention provides a fabric conditioning composition, which comprises:
• a method of preparing a composition comprising the step of pulverizing the powder of botanical origin to a particle size of from 0.1 to 100 microns preferably from 0.2 to 90 microns, more preferably from 0.5 to 60, even more preferably from 1 to 45 microns and most preferably from 2 to 30 microns.
• the present invention requires the use of ultra-fine powders.
• the powders suitable for use in the compositions of the invention are sparingly soluble, preferably insoluble particulate structures of botanical origin. They are preferably aromatic and as such preferably comprise one or more aromatic essential oils.
• the powders of the present invention can be of any shape and are not necessarily spherical and can have aspect ratio (ratio of length to diameter) greater than 1.
• aspect ratio ratio of length to diameter
• micronised, ultra-fine, or finely divided particle sizes having a maximum axis of from 0.1 to 100 microns preferably from 0.2 to 90 microns, more preferably from 0.5 to 60, even more preferably from 1 to 45 microns and most preferably from 2 to 30 microns.
• Particles of suitable size may be obtained by any suitable process, for example pulverizing, milling, etc. Fractionation, for example by sieving, may be used to separate the required particle size range.
• the powder is a material of botanical origin, and may be derived from any part of the plant, such as tubers, fruits, flowers, flower parts (calyx, stamen, etc), seeds, beans, pods, pith, woods, barks, stalks, stems, leaves, roots, rhizomes, husks, skins, rinds and mixtures thereof.
• aromatic powders examples include vanilla bean powder, ginger powder, cinnamon powder, cocoa powder, clove powder, cardamom powder, coriander powder, cumin powder, caraway powder, dill powder, chili powder, cyanine powder, turmeric powder, coffee bean powder, tea leaf powder, tea-tree powder, blackberry leaf powder, Lemon balm leaf powder, herb powders (for example, rosemary, thyme, sweet bay, sage, tarragon, mint, basil, balm, lemon verbena, red bergamot, marjoram, lavender and oregano), chamomile powder, fennel powder, lime rind powder, lemon rind powder, grapefruit rind powder, tangerine rind powder, mandarin rind powder, lemon grass powder, apple pomace powder, Lemon myrtle powder, red clover powder, liquorice powder and mixtures thereof.
• herb powders for example, rosemary, thyme, sweet bay, sage, tarragon, mint, basil, balm, lemon verbena, red bergamot
• Preferred non-aromatic powders include ginseng powder, rice husk flour, wheat husk flour, buckwheat husk flour and mixtures thereof.
• the powder can be an exfoliating agent selected from oat kernel flour, rice, rice bran flour and mixtures thereof.
• the powdered material can be in native form or may result from processes such as ageing, fermenting and roasting that would increase or alter the constituent aroma chemicals.
• the plant powders of the invention can be incorporated into laundry compositions in a similar fashion as other powdered ingredients.
• the powder of botanical origin is present in an amount of from 0.1 to 10 wt %, preferably from 0.3 to 6 wt %, more preferably from 0.4 to 4 wt % and most preferably from 0.5 to 3 wt % by weight of the total composition.
• the powders of botanical origin suitable for use in the invention are not extracted or isolated materials, such as polymers, for example lignin, starches or proteins, but are plant parts that are powdered in their bulk state.
• the powders are not intended to include cellulose or cellulose derivatives such as polymeric derivatives such as cellulose ethers.
• the plant parts (i.e. pre-powdered) and the powders are not subject to chemical purification, for example, to remove components such as lignin or pigments (but may, of course, be washed or cleaned).
• Deposition of micro-powder from the laundry formulations of the invention onto a substrate may be achieved by any suitable route.
• the particle size of the powder is such that the particles are trapped between the fibres of the fabric.
• the filtration mechanism requires particles or clusters of primary particles of a size comparable with the interyarn pore size.
• the particle size suitable for filtration is typically in the range of from 1 to 30 microns. Larger particles begin to be visible to the unaided eye, whereas smaller particles tend to be removed in the wash. Particles of around from 5 to 15 microns are preferred as they tend to be invisible to the eye and exhibit good deposition by filtration onto fabrics.
• Deposition of micro-powders from laundry formulations of the invention may also be achieved and enhanced over and above the delivery by filtration method, by polymer aided deposition.
• the polymeric deposition aid is suitably present at a level of from 0.01 to 5% by total weight of the composition preferably from 0.02 to 3%, more preferably from 0.2 to 2 % and most preferably from 0.5 to 1.6%.
• Polymeric deposition agent suitable for use in the present invention include modified natural polymers and synthetic polymers.
• Polymers suitable for the deposition of micro-powders are disclosed in WO9709406 , particularly high MW polyethylene oxides (PEO) which are used to deposit clay particles in the main wash;
• EP0299575B1 and WO9527037 disclose high MW PEO, polyacrylates, polyacryl amides, poly vinyl alcohol and poly ethylene imines, which are used to deposit clay particles in the main wash;
• EP0387426B1 which utilizes a similar list of polymers as well as guar gums.
• WO 01/07546 A1 discloses suitable rinse stage polymeric deposition aids for emulsion droplets including cationic guar polymers, cationic polyacrylamides, cationic potato starch, and cationic cellulose derivates.
• Preferred modified natural polymers suitable for use in the present invention may be selected from the group consisting of cationic starches, cationic guars, cationic cellulose, and nonionic locust bean gums (LBGs).
• a preferred cationic starch is a cationically modified potato starch.
• cationic polymers include cationic guar polymers such as Jaguar (ex Rhone Poulenc), cationic cellulose derivatives such as Celquats (ex National Starch), Flocaid (ex National Starch), cationic potato starch such as Softgel (ex Aralose) and cationic polyacrylamides such as PCG (ex Allied Colloids).
• cationic guar polymers such as Jaguar (ex Rhone Poulenc), cationic cellulose derivatives such as Celquats (ex National Starch), Flocaid (ex National Starch), cationic potato starch such as Softgel (ex Aralose) and cationic polyacrylamides such as PCG (ex Allied Colloids).
• Suitable non-ionic deposition aids include high molecular weight polyethylene glycols, for example PEO WSRN 750 (ex Union Carbide).
• Preferred synthetic polymers for use as a deposition aid, may be selected from the group consisting of polyethylene oxide (PEO), polyethylene imine (PEI), poly (acrylate), poly (acrylamide), polyethylene terephthalate-polyoxyethylene terephthalate (PET/POET) polymers and mixtures thereof.
• PEO polyethylene oxide
• PEI polyethylene imine
• PET polyoxyethylene terephthalate
• the fabric conditioning composition of the invention is suitable for use in a laundry process.
• a rinse treatment e.g. conditioner or finisher
• a post-treatment 'wet tissue' type product e.g. conditioner or finisher
• the compositions of the present invention are preferably rinse-added softening compositions.
• compositions of the invention may be in any physical form e.g. a tablet, a bar, a paste, gel or liquid, spray, stick, impregnated substrate, foam or mousse.
• compositions may be liquid or unit dose such as a pouch.
• the liquid products of the invention may have pH ranging from 2.5 to 7. This pH range preferably remains stable over the shelf life of the product.
• the active ingredient in the compositions is a fabric conditioning agent. More than one active ingredient may be included.
• the conditioning agents may be cationic or non-ionic. They may for example be used in amounts from 0.5% to 35%, preferably from 1 % to 30% more preferably from 3% to 25% by weight of the composition.
• the preferred softening active for use in rinse conditioner compositions of the invention is a quaternary ammonium compound.
• the quaternary ammonium fabric softening material for use in compositions of the present invention can be an ester-linked triethanolamine (TEA) quaternary ammonium compound comprising a mixture of mono-, di- and tri-ester linked components.
• TAA ester-linked triethanolamine
• TEA-based fabric softening compounds comprise a mixture of mono, di-and tri-ester forms of the compound where the di-ester linked component comprises no more than 70% by weight of the fabric softening compound, preferably no more than 60%, e.g. no more than 55%, or even no more than 45% of the fabric softening compound and at least 10% of the monoester linked component by weight of the fabric softening compound.
• a first group of quaternary ammonium compounds (QACs) suitable for use in the present invention is represented by formula (I): wherein each R is independently selected from a C 5-35 alkyl or alkenyl group; R 1 represents a C 1-4 alkyl, C 2-4 alkenyl or a C 1-4 hydroxyalkyl group; T is generally O-CO. (i.e. an ester group bound to R via its carbon atom), but may alternatively be CO-O (i.e.
• TEA ester quats di-esters of triethanolamine methylsulphate, otherwise referred to as "TEA ester quats.”
• Commercial examples include Prapagen TQL, ex Clariant, and Tetranyl AHT-1, ex Kao, (both di-[hardened tallow ester] of triethanolamine methylsulphate), AT-1 (di-[tallow ester] of triethanolamine methylsulphate), and L5/90 (di-[palm ester] of triethanolamine methylsulphate), both ex Kao, and Rewoquat WE15 (a di-ester of triethanolamine methylsulphate having fatty acyl residues deriving from C 10 -C 20 and C 16 -C 18 unsaturated fatty acids), ex Witco Corporation.
• the second group of QACs suitable for use in the invention is represented by formula (II): wherein each R 1 group is independently selected from C 1-4 alkyl, hydroxyalkyl or C 2-4 alkenyl groups; and wherein each R 2 group is independently selected from C 8-28 alkyl or alkenyl groups; and wherein n, T, and X- are as defined above.
• Preferred materials of this second group include 1,2 bis[tallowoyloxy]-3-trimethylamine propane chloride, 1,2 bis [hardened tallowoyloxy]-3-trimethylamine propane chloride, 1,2- bis [oleoyloxy]-3-trimethylamine propane chloride, and 1,2 bis [stearoyloxy]-3-trimethylamine propane chloride.
• Such materials are described in US 4,137,180 (Lever Brothers).
• these materials also comprise an amount of the corresponding mono-ester.
• a third group of QACs suitable for use in the invention is represented by formula (III): (R 1 ) 2 -N + -[(CH 2 ) n -T-R 2 ] 2 X - (III) wherein each R 1 group is independently selected from C 1-4 alkyl, or C 2-4 alkenyl groups; and wherein each R 2 group is independently selected from C 8-28 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 and hardened versions thereof.
• the iodine value of the quaternary ammonium fabric softening material is from 0 to 60, preferably from 0 to 45, more preferably from 0 to 30, and most preferably from 0 to 20.
• lodine value is defined as the number of grams of iodine absorbed per 100 g of test material.
• NMR spectroscopy is a suitable technique for determining the iodine value of the softening agents of the present invention, using the method described in Anal. Chem., 34, 1136 (1962) by Johnson and Shoolery and in EP 593,542 (Unilever, 1993).
• the non-ester softening compound preferably has the alkyl or alkenyl chain lengths referred to above for the non-ester softening compound.
• non-ester softening compound is a quaternary ammonium material represented by formula (IV):- wherein each R 1 group is independently selected from C 1-4 alkyl, hydroxyalkyl or C 2-4 alkenyl groups; R 2 group is independently selected from C 8-28 alkyl or alkenyl groups, and X- is as defined above.
• compositions may comprise a total amount of from 0.5 wt % to 40 wt % by weight of the fabric softening compounds, preferably from 1.5 wt % to 30 wt %, more preferably from 4 to 25 wt %, most preferably from 10 to 30 wt %, based on the total weight of the composition.
• compositions may alternatively or additionally contain nonionic fabric softening agents such as lanolin and derivatives thereof.
• nonionic fabric softening agent suitable for use in the compositions of the invention is Castor oil, for example, from Now Chemicals.
• Lecithins and other phospholipids are also suitable softening compounds.
• a further preferred type of softening agent is a sugar polyester.
• the sugar polyester is preferably selected from the group consisting of sucrose polyesters, glucose polyesters and cellobiose polyesters, and is most preferably a sucrose polyester.
• the sugar polyester may be liquid, soft solid or solid.
• the preferred sucrose polyesters for use in the present invention have 2 to 4 hydrocarbon chains per sugar ring, where the hydrocarbon chain has a length of from 12 to 22 carbon atoms.
• a particularly preferred sucrose polyester is sucrose tetraerucate.
• sucrose polyester is Ryoto Sugar Ester ER290 supplied by Mitsubishi Kagaku Foods Corporation, which is a sucrose tetraerucate and according to the manufacturer's specification is mainly Tetraerucate, Pentaerucate and Hexaerucate and has a HLB value of 2.
• the sugar polyester may be pure, or may contain impurities.
• the impurities are preferably selected from the group consisting of free fatty acid, fatty acid methyl ester, soap, inorganic salts and mixtures thereof.
• the most preferred SPEs are commercially available, such as Emanon SCR-PK (ex KAO), which is a palm kernel derived SPE containing mainly C 12 -C 14 with about 20% C 18 mono unsaturatation and SPE-THSBO (ex Clariant), which is derived from touch hardened soy bean oil, having mainly C 16 -C 18 chains with about 80% mono and di unsaturation.
• Emanon SCR-PK ex KAO
• SPE-THSBO Clariant
• the average degree of esterification of the above preferred SPEs is from 4.2 to 4.7.
• SCR-PK contains up to 20% impurities but SPE-THSBO is pure.
• SCR-PK contains from 4 to 6 wt% of K soap, 2.5 wt% of free fatty acid, from 10 to 15 wt% of fatty acid methyl ester and less than 1 % of KCl.
• the sugar polyester being non-ionic oil, requires an emulsifier, that is to say, the sugar polyester must be in an emulsified form.
• the emulsifier is preferably selected from cationic surfactant, anionic surfactant, non-ionic surfactant, and mixtures thereof.
• the ultra-fine particles of the invention themselves can act as stabilizer and emulsifier for the nonionic softeners such as sugar polyesters (SPEs).
• SPEs sugar polyesters
• a nonionic stabilising agent may be present.
• Suitable nonionic stabilising agents may be present such as linear C 8 to C 22 alcohols alkoxylated with 10 to 20 moles of alkylene oxide, C 10 to C 20 alcohols, or mixtures thereof.
• Other stabilising agents include the deflocculating polymers as described in EP 0415698A2 and EP 0458599B1 .
• the nonionic stabilising agent is a linear C 8 to C 22 alcohol alkoxylated with 10 to 20 moles of alkylene oxide.
• the level of nonionic stabiliser is within the range from 0.1 to 10% by weight, more preferably from 0.5 to 5% by weight, most preferably from 1 to 4% by weight.
• the mole ratio of the quaternary ammonium compound and/or other cationic softening agent to the nonionic stabilising agent is suitably within the range from 40:1 to about 1:1, preferably within the range from 18:1 to about 3:1.
• the composition can also contain fatty acids, for example C 8 to C 24 alkyl or alkenyl monocarboxylic acids or polymers thereof.
• the fatty acid is non-saponified, more preferably the fatty acid is free, for example oleic acid, lauric acid or tallow fatty acid.
• the level of fatty acid material is preferably more than 0.1 % by weight, more preferably more than 0.2% by weight.
• Concentrated compositions may comprise from 0.5 to 20% by weight of fatty acid, more preferably 1% to 10% by weight.
• the weight ratio of quaternary ammonium material or other cationic softening agent to fatty acid material is preferably from 10:1 to 1:10.
• Cationic surfactants which can be used in main-wash compositions for fabrics.
• Cationic surfactants that may be used include quaternary ammonium salts of the general formula R1R2R3R4N + X-wherein the R groups are long or short hydrocarbon chains, typically alkyl, hydroxyalkyl or ethoxylated alkyl groups, and X is a counter-ion (for example, compounds in which R1 is a C 8 -C 22 alkyl group, preferably a C 8 -C 10 or C 12 -C 14 alkyl group, R2 is a methyl group, and R3 and R4, which may be the same or different, are methyl or hydroxyethyl groups); and cationic esters (for example, choline esters).
• aqueous rinse added conditioners the level of cationic or nonionic softener varies from 3 to 30% more preferably from 5 to 25%.
• botanical powders can be incorporated in predominately non-aqueous systems containing up to 60% fabric softening actives.
• the fabric conditioning compositions of the invention can also contain adjuvants that are normal in the cosmetic, pharmaceutical and/or dermatological field, such as hydrophilic or lipophilic gelling agents, hydrophilic or lipophilic active agents, preserving agents, antioxidants, solvents, fragrances, fillers, screening agents, bactericides, odour absorbers, photobleaches (singlet oxygen or radical type) and dyestuffs.
• adjuvants that are normal in the cosmetic, pharmaceutical and/or dermatological field, such as hydrophilic or lipophilic gelling agents, hydrophilic or lipophilic active agents, preserving agents, antioxidants, solvents, fragrances, fillers, screening agents, bactericides, odour absorbers, photobleaches (singlet oxygen or radical type) and dyestuffs.
• the amounts of these various adjuvants are those conventionally used in the field under consideration and are, for example, from 0.01 to 20% of the total weight of the composition. Depending on their nature, these adjuvants can be introduced into the
• the substrate When used in laundering, the substrate may be any substrate onto which it is desirable to deposit the botanical particles and which is subjected to treatment such as a washing or rinsing process.
• the substrate may be a textile fabric.
• the treatment of the substrate with the composition of the invention can be made by any suitable method such as washing, soaking or rinsing of the substrate but also by direct application such as spraying, rubbing, spotting, smearing, etc.
• the treatment may involve contacting the substrate with an aqueous medium comprising the material of the invention.
• the treatment may be provided as a spray composition e.g., for domestic (or industrial) application to fabric in a treatment separate from a conventional domestic laundering process.
• Suitable spray dispensing devices are disclosed in WO 96/15310 (Procter & Gamble).
• compositions of the invention may be used to provide a perfume and/or odour benefit, for example a reduction in malodour, to fabric.
• Plant powders having a particle size within the claimed range were prepared using a Retsch ZM1000 Ultra Centrifugal Mill operating at a speed of 10,000 rpm. The mill was fitted with a 24 tooth rotor and a 0.12 mm screen.
• Table 1 gives two examples of the size fractions that remained on each sieve from 10g of the starting powder.
• Table 1 Weight fractions remaining on the sieve from 10g of starting powder after 30 minutes of shaking (for ginger) and by brushing (for cardamom).
• Sieve aperture size ⁇ m
• Ginger g
• Cardamom g
• 180 1.75 0.34 125 1.23 0.55
• 90 1.56 1.22 75 0.93 0.93 63 1.39 2.19
• Example 2 Softener compositions 1 to 4 comprising herbs and spices, according to the invention
• Table 2 Fabric softening of compositions 1 to 4 Composition 1 2 3 4 Micro-powder Ginger powder* 5.0 Cardamom powder* 3.5 Lavender + Chamomile leaves powder* 4.0 Ayurvedic mixture* 2.5 Softener TEA Quat** 13.50 13.50 13.50 SPE Emanon SCR-PK***(Kao) 13.50 Fatty alcohol (hard tallow) 1.00 1.00 1.00 0.0 Emulsifier/deposition aid GenapolC200 (coco20EO) (ex Clariant) 0.95 0.95 0.95 0.85 Polymer Softgel BDA (Avebe) 1.0 0.0 0.0 1.5 Polymer JR-30M (Armerchol) 0.0 1.0 0.0 0.0 Polymer LBG (Sigma) 0.0 0.0 1.0 0.0 Other components Perfume 0.50 0.50 0.50 Water to 100 To 100 To 100 To 100 * Ginger, cardamom, and lavender pulverized and size fractionated as described
• the level of deposition of the particles from a rinse solution can be quantified by measuring the turbidity, or light transmission, of the rinse solution before and after the solution is contacted with the fabrics.
• Light transmission or turbidity measurements for this purpose cannot be conducted in the presence of cationic softeners because of their inherent milkiness.
• CAC cationic surfactant
• Table 3 summarizes the deposition from the rinse solution for mint particles ⁇ 45 ⁇ m in the presence of 3 different deposition polymers. Deposition is expressed as a percentage of the total amount of added particles in the solution.
• Softgel BDA (Avebe) is a cationic potato starch with low, 0.05%, degree of substitution (charge).
• Ucare polymer JR-30M (Amerchol) is a cationic hydroxyethyl cellulose with a 1.5-2.2% degree of substitution.
• LBG (Sigma) is a non-ionic locust bean gum polysaccharide.
• the level of delivery from the rinse solution simulating the washing machine condition is surprisingly good from the cationic solution alone compared to water.
• the polymers have improved the deposition except for polyester where the high charged density JR polymer has improved deposition over and above that of control CTAC.
• LBG has improved the deposition on cotton and polycotton (positively charged substrates in CTAC) most likely through its affinity and recognition of cellulose units.
• the wet monitors had a strong smell of the deposited particles which on drying had a faint remnant. On synthetics like polyester this was sufficient to mask the dusty vinegar smell of polyester fabric to a pleasant smell.

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• 2009
  • 2009-11-26 EP EP09756758A patent/EP2366011B1/en active Active
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