Benefit agent delivery particles

Abstract

The present invention provides a benefit agent delivery particle having a core-shell structure, wherein a porous shell of polymeric material encloses a core comprising the benefit agent; wherein the pores in the shell are at least partially occluded by a wash-removable coating disposed at the outer surface of the shell; characterised in that the wash-removable coating is formed from a deposited melamine / acid complex.

Description

Technical Field

[0001] This invention relates to beneficial agent (e.g., fragrance) delivery particles and compositions containing them (e.g., laundry treatment compositions). Background Technology

[0002] In laundry treatment compositions such as laundry detergents, the fragrance perceived by the consumer is one of the most important attributes. Effectively delivering the appropriate fragrance to the fabric during the washing process and releasing that fragrance at key consumer moments is crucial for delivering clean, fresh, washed clothes.

[0003] Delivering fragrances at critical moments is a difficult task because laundry detergents are typically designed to remove oily substances or particulate solids from washed fabrics. Fragrances are also typically oily substances.

[0004] The encapsulation of fragrances improves fragrance deposition on fabrics and delays fragrance release when consumers wear clothing.

[0005] However, another important moment for consumers is when clothes are in the "damp" stage, which extends from when clothes are taken out of the washing machine to when they are almost dry. A good fragrance experience is needed during this stage, without significantly impairing fragrance performance at other stages (such as in the pre-use packaging composition and when washed clothes are drying).

[0006] This invention solves the problem. Summary of the Invention

[0007] The present invention provides a beneficial agent delivery particle having a core-shell structure, wherein a porous shell of polymer material encapsulates a core containing the beneficial agent; wherein the pores in the shell are at least partially blocked by a washable removable coating disposed on the outer surface of the shell; characterized in that the washable removable coating is formed of a deposited melamine / acid composite.

[0008] The present invention also provides a laundry treatment composition comprising beneficial agent delivery particles as defined above. Detailed Implementation

[0009] The core of the beneficial agent delivery particle of the present invention is typically formed in the internal region of the particle and provides a pool for the beneficial agent. The shell typically protects the beneficial agent from the influence of the external environment and regulates the flow of the beneficial agent into and out of the core.

[0010] In the beneficial agent delivery particles of the present invention, the presence of a washable coating is used to reduce leakage of trapped beneficial agents through pores in the shell. Removing the coating during the washing operation helps to release the trapped beneficial agents.

[0011] As used herein, the term "washing operation" generally refers to a method of washing fabrics using the washing treatment composition according to the present invention.

[0012] The washable coating is formed from a deposited melamine / acid complex. The melamine / acid complex used to form the washable coating preferably has a solubility of less than about 10 mg / L in distilled water (at 25°C and atmospheric pressure), more preferably less than about 1 mg / L, to prevent the coating from being removed too quickly during washing.

[0013] Suitable melamine / acid complexes for forming washable coatings can be derived from the combination of melamine with polyfunctional organic acids.

[0014] Melamine is a heterocyclic aromatic molecule composed of a triazine ring with three amino groups at positions 2, 4, and 6. The solubility of melamine in distilled water (at 25°C and atmospheric pressure) is approximately 0.3 g / L.

[0015] The preferred polyfunctional organic acid used in this invention has a solubility of at least about 0.1 mg / L in distilled water (at 25°C and atmospheric pressure), more preferably at least about 1 mg / L; and is capable of interacting with melamine to form a self-assembled complex via an organized intramolecular network. Complex formation can be driven by various non-covalent interactions, including ionic interactions, π-π stacking, and complementary hydrogen bonding. Examples of preferred polyfunctional organic acids used in this invention include polycarboxylic acids, such as BTCA (1,2,3,4-butanediol), especially folic acid (N-[4-(2-amino-3,4-dihydro-4-oxo-6-pteridinylmethylamino)-benzoyl]-L-glutamic acid).

[0016] Any mixture of the above materials may also be suitable.

[0017] Most preferably, the melamine / acid complex used to form the washable coating corresponds to the following general formula (I):

[0018]

[0019] In a suitable method for preparing the beneficial agent delivery particles of the present invention, melamine, followed by a polyfunctional organic acid, is mixed into a slurry of preformed particles having a core-shell structure, wherein the porous shell of the polymer material encapsulates a core containing the beneficial agent (hereinafter referred to as "preformed core-shell particles").

[0020] Preferably, melamine and polyfunctional organic acids are mixed in a molar ratio of about 2:1 to about 10:1.

[0021] Preferably, the slurry for preforming core-shell particles is a dilute aqueous slurry with a water content of at least 60%, preferably at least 80% (by weight based on total weight). Dilution can help promote the dissolution of polyfunctional organic acids and / or prevent coagulation.

[0022] Preferably, the slurry is heated to at least 50°C, more preferably at least 60°C, to enable the melamine and the polyfunctional organic acid to recombine. Upon cooling, the melamine / acid complex is deposited by deposition onto the outer shell surface of the pre-formed core-shell particles. This coating is formed from the deposited melamine / acid complex, which typically forms a lamellar structure, such as fragments, flakes, or leaves, on the outer shell surface. Secondary structures (e.g., films, granules, and networks) can also be formed.

[0023] Successful coating of core-shell particles can be appropriately confirmed by high-resolution SEM imaging.

[0024] Preferred preformed core-shell particles have a negative charge on their outer shell surface, with a zeta potential of -0.1 meV to -100 meV, more preferably -10 meV to -80 meV, and most preferably -20 meV to -75 meV. The zeta potential is measured at 25°C using dynamic light scattering (DLS) with Zetasizer Nano. TM The ZS90 (Malvern Instruments Ltd, UK) is suitable for measurement. A dispersion of particles in deionized water with a solids content of approximately 500 ppm and a pH adjusted to approximately 7 is used for this measurement.

[0025] Preformed core-shell particles can be prepared appropriately using methods known to those skilled in the art, such as agglomeration, interfacial polymerization, and polycondensation.

[0026] Coagulation processes typically involve encapsulating a core material that is usually water-insoluble by depositing a colloidal material onto the surface of a droplet of material. Coagulation can be simple, for example, under carefully controlled conditions of pH, temperature, and concentration, using a single colloid such as gelatin, or a complex of two or more colloids with opposite charges, such as gelatin and gum arabic or gelatin and carboxymethyl cellulose.

[0027] Interfacial polymerization typically proceeds to the formation of fine dispersions of oil droplets (containing a core material) in an aqueous continuous phase. The dispersed droplets form the core of future core-shell particles, and the size of the dispersed droplets directly determines the size of the future core-shell particles. A shell-forming material (monomer or oligomer) is contained in both the dispersed phase (oil droplets) and the aqueous continuous phase, and they react together at the phase interface to build a polymer wall around the oil droplets, thereby encapsulating them. An example of core-shell particles produced by this method has a polyurea shell formed by reacting diisocyanates or polyisocyanates with diamines or polyamines.

[0028] Polycondensation involves forming a dispersion or emulsion of the core material in an aqueous solution of a precondensate of a polymer material under appropriate agitation conditions to produce a dispersed core material of the desired particle size, and adjusting the reaction conditions to induce condensation of the precondensate via acid catalysis, causing the condensate to separate from the solution and surround the dispersed core material to produce a cohesive film and the desired particles. An example of core-shell particles produced by this method has an amino-plastic shell formed from the polycondensation product of melamine (2,4,6-triamino-1,3,5-triazine) or urea with formaldehyde. Suitable crosslinking agents (e.g., toluene diisocyanate, divinylbenzene, butylene diacrylate) can also be used, and second-wall polymers, such as acid anhydrides and their derivatives, particularly polymers and copolymers of maleic anhydride, may also be used as appropriate.

[0029] In the beneficial agent delivery particles of the present invention, the porous shell of the polymer material is preferably an amino plastic shell formed from the condensation product of melamine and formaldehyde.

[0030] The shell is preferably approximately spherical; and typically accounts for a maximum of 20% by weight, based on the total weight of the beneficial agent delivery particles.

[0031] The beneficial agent delivery particles of the present invention typically have an average particle size between 100 nanometers and 50 micrometers. Particles larger than this range are visible. Examples of submicron particles include latexes and microemulsions with average particle sizes in the range of 100 to 600 nanometers. The average size of the core-shell particles suitable for the present invention is preferably 0.6-50 micrometers, more preferably 2-30 micrometers, and most preferably 5-25 micrometers. The particle size distribution can be narrow, wide, or multi-peaked. If necessary, the initially generated particles can be filtered or screened to produce a product with higher size uniformity.

[0032] Unless otherwise stated, “size” as used herein refers to diameter. For samples with particle diameters no greater than 1 micrometer, diameter refers to the measured z-mean particle size, for example, using dynamic light scattering (as described in international standard ISO 13321) and instruments such as the Zetasizer Nano. TM The measurement was performed using a ZS90 (Malvern Instruments Ltd, UK). For samples with particle diameters greater than 1 micrometer, the diameter refers to the apparent median diameter (D50), which can be measured, for example, by laser diffraction (as described in international standard ISO 13320) and instruments such as Mastersizer. TM Measurements were taken in 2000 (Malvern Instruments Ltd, UK).

[0033] The beneficial agent delivery particles of the present invention may have a deposition aid disposed on the surface of the shell. The deposition aid is used to modify the properties of the shell surface, for example, to make the particles more compatible with a desired matrix. The desired matrix includes cellulose (including cotton) and polyester (including those used to produce polyester fabrics).

[0034] Deposition aids can be suitably provided on the shell surface via covalent bonding, entanglement, or strong adsorption. Preferably, such deposition aids are attached to the shell surface directly or via a connecting substance through covalent bonding.

[0035] The deposition aids used in this invention can be suitably selected from polysaccharides that have an affinity for cellulose. Such polysaccharides can be naturally occurring or synthetic, and can have an inherent affinity for cellulose, or can have been derivatized or otherwise modified to have an affinity for cellulose. Suitable polysaccharides have a 1-4 linked β-glycan (generalized sugar) backbone structure, having at least 4, and preferably at least 10, β1-4 linked backbone residues, such as a dextran backbone (composed of β1-4 linked glucose residues), a mannan backbone (composed of β1-4 linked mannose residues), or a xylan backbone (composed of β1-4 linked xylose residues). Examples of such β1-4 linked polysaccharides include xyloglucan, glucomannan, mannan, galactomannan, β(1-3),(1-4)glucan, and the xylan family comprising glucurono-, arabino-, and glucuronoarabinoyl xylan. Preferred β1-4 linked polysaccharides used in this invention may be selected from plant-derived xyloglucans, such as pea xyloglucan and tamarind seed xyloglucan (TXG) (which has a β1-4 linked glucan backbone with side chains of α-D-xylpyranose and β-D-galactopyranosyl-(1-2)-α-D-xylanose, both of which are 1-6 linked to the backbone); and plant-derived galactomannans, such as locust bean gum (LBG) (which has a β1-4 linked mannan backbone with single-unit galactose side chains α1-6 linked to the backbone).

[0036] Also suitable are polysaccharides that, upon hydrolysis, have an affinity for cellulose (such as cellulose monoacetate); or modified polysaccharides that have an affinity for cellulose such as hydroxypropyl cellulose, hydroxypropyl methylcellulose, hydroxyethyl methylcellulose, hydroxypropyl guar gum, hydroxyethyl ethyl cellulose, and methylcellulose.

[0037] The deposition aids used in this invention may also be selected from phthalate-containing polymers that have an affinity for polyesters. Such phthalate-containing polymers may have one or more nonionic hydrophilic segments comprising oxyalkylene groups (such as oxyethylene, polyoxyethylene, oxypropylene, or polyoxypropylene) and one or more hydrophobic segments comprising terephthalate groups. Typically, the oxyalkylene groups will have a degree of polymerization of 1 to about 400, preferably 100 to about 350, more preferably 200 to about 300. Suitable examples of this type of phthalate-containing polymer are copolymers having random blocks of polyethylene terephthalate and polyethylene oxide terephthalate.

[0038] Any mixture of the above materials may also be suitable.

[0039] The deposition aids used in this invention will typically have a weight-average molecular weight (Mn) in the range of about 5 kDa to about 500 kDa, preferably about 10 kDa to about 500 kDa, and more preferably about 20 kDa to about 300 kDa. w ).

[0040] In the beneficial agent delivery particles of the present invention, the core contains a beneficial agent. In the case of fabric washing, preferred beneficial agents include fragrances, clays, enzymes, antifoaming agents, fluorescent agents, bleaching agents and their precursors (including photobleaching), dyes and / or pigments, conditioning agents (e.g., cationic surfactants comprising water-insoluble quaternary ammonium materials, fatty alcohols and / or silicones), lubricants (e.g., sugar polyesters), color and light protection agents (including opacifiers), antioxidants, ceramides, reducing agents, chelating agents, color care additives (including color-fixing agents), unsaturated oils, lubricants, humectants, insect repellents and / or pheromones, drape improvers (e.g., polymer latex particles, such as PVA), and antimicrobial agents or microbial control agents.

[0041] Any mixture of the above materials may also be suitable. In the context of this invention, the most preferred beneficial agent is an aromatic preparation.

[0042] The aromatic formulations used in this invention typically contain a mixture of selected aromatic components, optionally mixed with one or more excipients. The combination of various aromatic components produces a pleasant or desirable fragrance.

[0043] In the context of this invention, the term "aromatic component" refers essentially to a material used, alone or in combination with other such materials, to impart a pleasant odor to the composition (incorporated therein) and / or the surface (applied thereto). Materials possessing these properties are typically small, lipophilic molecules with sufficient volatility to be transported to the upper olfactory system of the nose.

[0044] The aromatic components used in this invention will typically have a molecular weight of less than 325 atomic mass units, preferably less than 300 atomic mass units, and more preferably less than 275 atomic mass units. This molecular weight is preferably greater than 100 atomic mass units, more preferably greater than 125 atomic mass units, because lower molecular weights may be too volatile and / or insufficiently lipophilic to be effective.

[0045] The aromatic components used in this invention will preferably have a molecular structure free of halogen atoms and / or strongly ionized functional groups such as sulfonate, sulfate or quaternary ammonium ions.

[0046] The aromatic components used in this invention will more preferably have a molecular structure containing only atoms from (but not necessarily all) of the following: hydrogen, carbon, oxygen, nitrogen, and sulfur. Most preferably, the aromatic components will have a molecular structure containing only atoms from (but not necessarily all) of the following: hydrogen, carbon, and oxygen.

[0047] Examples of aromatic components include aromatic hydrocarbons, aliphatic hydrocarbons, and araliphatic hydrocarbons having a molecular weight of about 90 to about 250; aromatic esters, aliphatic esters, and araliphatic esters having a molecular weight of about 130 to about 250; aromatic nitriles, aliphatic nitriles, and araliphatic nitriles having a molecular weight of about 90 to about 250; aromatic alcohols, aliphatic alcohols, and araliphatic alcohols having a molecular weight of about 90 to about 240; aromatic ketones, aliphatic ketones, and araliphatic ketones having a molecular weight of about 150 to about 270; aromatic lactones, aliphatic lactones, and araliphatic lactones having a molecular weight of about 130 to about 290; aromatic aldehydes, aliphatic aldehydes, and araliphatic aldehydes having a molecular weight of about 90 to about 230; aromatic ethers, aliphatic ethers, and araliphatic ethers having a molecular weight of about 150 to about 270; and condensation products of aldehydes and amines having a molecular weight of about 180 to about 320.

[0048] Specific examples of the aromatic components used in this invention include:

[0049] i) Hydrocarbons, such as D-limonene, 3-carene, α-pinene, β-pinene, α-terpinene, γ-terpinene, p-cymene, bisabolene, camphene, caryophyllene, cedrene, farnesene, longleafene, myrcene, ocimene, valencene, (E,Z)-1,3,5-undecanetriene, styrene, and diphenylmethane;

[0050] ii) Aliphatic alcohols and arylaliphatic alcohols, such as, for example, benzyl alcohol, 1-phenylethanol, 2-phenylethanol, 3-phenylpropanol, 2-phenylpropanol, 2-phenoxyethanol, 2,2-dimethyl-3-phenylpropanol, 2,2-dimethyl-3-(3-methylphenyl)propanol, 1,1-dimethyl-2-phenylethanol, 1,1-dimethyl-3-phenylpropanol, 1-ethyl-1-methyl-3-phenylpropanol, 2-methyl-5-phenylpentanol, 3-methyl-5-phenylpentanol, 3-phenyl-2-propen-1-ol, 4-methoxybenzyl alcohol, 1-(4-isopropylphenyl)ethanol, Hexanol, octanol, 3-octanol, 2,6-dimethylheptanol, 2-methyl-2-heptanol, 2-methyl-2-octanol, (E)-2-hexenol, (E)- and (Z)-3-hexenol, 1-octen-3-ol, a mixture of 3,4,5,6,6-pentamethyl-3 / 4-hepten-2-ol and 3,5,6,6-tetramethyl-4-methylenehepten-2-ol, (E,Z)-2,6-nonadienol, 3,7-dimethyl-7-methoxyoct-2-ol, 9-decenol, 10-undecenol and 4-methyl-3-decen-5-ol;

[0051] iii) Cyclic alcohols and cyclic aliphatic alcohols, such as, for example, 4-tert-butylcyclohexanol, 3,3,5-trimethylcyclohexanol, 3-isocampylcyclohexanol, 2,6,9-trimethyl-Z2,Z5,E9-cyclododecanetrien-1-ol, 2-isobutyl-4-methyltetrahydro-2H-pyran-4-ol, α,3,3-trimethylcyclohexylmethanol, 2-methyl-4-(2,2,3-trimethyl-3-cyclopentan-1-yl)butanol, 2-methyl-4-(2,2,3-trimethyl-3-cyclopentan-1-yl)-2-buten-1-ol, 2-ethyl- 4-(2,2,3-trimethyl-3-cyclopentan-1-yl)-2-buten-1-ol, 3-methyl-5-(2,2,3-trimethyl-3-cyclopentan-1-yl)-pentan-2-ol, 3-methyl-5-(2,2,3-trimethyl-3-cyclopentan-1-yl)-4-penten-2-ol, 3,3-dimethyl-5-(2,2,3-trimethyl-3-cyclopentan-1-yl)-4-penten-2-ol, 1-(2,2,6-trimethylcyclohexyl)pentan-3-ol and 1-(2,2,6-trimethylcyclohexyl)hex-3-ol;

[0052] iv) Aliphatic aldehydes and their acetals, such as hexanal, heptanal, octanal, nonanal, decanal, undecanal, lauraldehyde, tridecanal, 2-methyloctanal, 2-methylnonanal, 2-methylundecanal, (E)-2-hexenal, (Z)-4-heptenal, 2,6-dimethyl-5-heptenol, 10-undecenal, (E)-4-decenal, 2-dodecenal, 2,6,10-trimethyl-5,9-10-undecadienal, heptanal-diethyl acetal, 1,1-dimethoxy-2,2,5-trimethyl-4-hexene, and citronellyloxyacetaldehyde;

[0053] v) Aliphatic ketones and their oximes, such as, for example, 2-heptanone, 2-octanone, 3-octanone, 2-nonanone, 5-methyl-3-heptanone, 5-methyl-3-heptanone oxime and 2,4,4,7-tetramethyl-6-octen-3-one;

[0054] vi) Aliphatic sulfur-containing compounds, such as 3-methylthiohexanol, 3-methylthiohexyl acetate, 3-mercaptohexanol, 3-mercaptohexyl acetate, 3-mercaptohexylbutyrate, 3-acetylthiohexyl acetate and 1-menthol-8-thiol.

[0055] vii) Aliphatic nitriles, such as 2-nonenonitrile, 2-tetrenonitrile, 2,12-tetrenonitrile, 3,7-dimethyl-2,6-octadienonitrile and 3,7-dimethyl-6-octenonitrile;

[0056] viii) Aliphatic carboxylic acids and their esters, such as (E)- and (Z)-3-hexenyl carboxylates, ethyl acetoacetate, isoamyl acetate, hexyl acetate, 3,5,5-trimethylhexyl acetate, 3-methyl-2-butenyl acetate, (E)-2-hexenyl acetate, (E)- and (Z)-3-hexenyl acetate, octyl acetate, 3-octyl acetate, 1-octen-3-yl acetate, ethyl butyrate, butyl butyrate, isoamyl butyrate. Hexyl butyrate, (E)- and (Z)-3-hexenyl isobutyrate, hexyl crotonate, ethyl isovalerate, ethyl-2-methylvalerate, ethyl hexanoate, allyl hexanoate, ethyl heptaate, allyl heptaate, ethyl octanoate, ethyl-(E,Z)-2,4-decadienoate, methyl-2-octanoate, methyl-2-nonanoate, allyl-2-isopentyloxoacetate, and methyl-3,7-dimethyl-2,6-octadienoate;

[0057] ix) Acyclic terpene alcohols, such as citronellol; geraniol; nerol; linalool; lavenderol; nerolidol; farnesol; tetrahydrolinalool; tetrahydrogeraniol; 2,6-dimethyl-7-octen-2-ol; 2,6-dimethyloct-2-ol; 2-methyl-6-methylene-7-octen-2-ol; 2,6-dimethyl-5,7-octadien-2-ol; 2,6-dimethyl-3,5-octadien- 2-ol; 3,7-dimethyl-4,6-octadien-3-ol; 3,7-dimethyl-1,5,7-octtrien-3-ol; 2,6-dimethyl-2,5,7-octtrien-1-ol; and their formate, acetate, propionate, isobutyrate, butyrate, isovalerate, valerate, hexanoate, crotonate, tiglinates and 3-methyl-2-butenoate;

[0058] x) Acyclic terpenoid aldehydes and ketones, such as geranialdehyde, neraldehyde, citronellol, 7-hydroxy-3,7-dimethyloctanal, 7-methoxy-3,7-dimethyloctanal, 2,6,10-trimethyl-9-undecenal, α-sweet orange aldehyde, β-sweet orange aldehyde, geraniol acetone, and dimethyl and diethyl acetals of geranialdehyde, neraldehyde and 7-hydroxy-3,7-dimethyloctanal;

[0059] xi) Cyclic terpenoid alcohols, such as menthol, isomentheptyl alcohol, α-terpineol, terpinene-4-ol, mentha-8-ol, mentha-1-ol, mentha-7-ol, borneol, isoborneol, linalool oxide, nobol, cedrol, ambrinol, vetiverol, guaiacol, and α-terpineol, terpinene-4-ol, mentha-8-ol, mentha-1-ol, mentha-7-ol, borneol, isoborneol, linalool oxide, nobol, cedrol, ambrinol, vetiverol, and guaiacol in the form of esters, acetates, propionates, isobutyrates, butyrates, isovalerates, valerates, hexanoates, crotonates, cis-carboxylate, and 3-methyl-2-butenoate;

[0060] xii) Cyclic terpenoid aldehydes and ketones, such as menthone, isomenthone, 8-mercaptomenthane-3-one, carvone, camphor, fennelone, α-ionone, β-ionone, α-methylionone, β-methylionone, α-isomethylionone, β-isomethylionone, α-irisone, α-turiketone, β-turiketone, β-damasneone, δ-turiketone, γ-turiketone, 1-(2,4,4-trimethyl-2-cyclohexen-1-yl)-2-buten-1-one, 1,3,4,6,7,8a-hexahydro-1,1,5,5-tetramethyl-2H-2,4a-bridged methylenenaphthalene-8(5H)-one, nocaconone, dihydronocaconone, and cypress methyl ketone;

[0061] xiii) Cyclic ethers and cyclic aliphatic ethers, such as, for example, eucalyptol, cypress methyl ether, cyclododecyl methyl ether, (ethoxymethoxy)cyclododecane; α-cedrene epoxide, 3a,6,6,9a-tetramethyldodecanonaphtho[2,1-b]furan, 3a-ethyl-6,6,9a-trimethyldodecanonaphtho[2,1-b]furan, 1,5,9-trimethyl-13-oxabicyclo[10.1.0]-tetadeca-4,8-diene, rose oxide and 2-(2,4-dimethyl-3-cyclohexen-1-yl)-5-methyl-5-(1-methylpropyl)-1,3-dioxane;

[0062] xiv) Cyclic ketones, such as, for example, 4-tert-butylcyclohexanone, 2,2,5-trimethyl-5-pentylcyclopentanone, 2-heptylcyclopentanone, 2-pentylcyclopentanone, 2-hydroxy-3-methyl-2-cyclopenten-1-one, 3-methyl-cis-2-penten-1-yl-2-cyclopenten-1-one, 3-methyl-2-pentyl-2-cyclopenten-1-one, 3-methyl-4-cyclopentadecenone, 3-methyl 5-Cyclopentadecanone, 3-methylcyclopentadecanone, 4-(1-ethoxyvinyl)-3,3,5,5-tetramethylcyclohexanone, 4-tert-amylcyclohexanone, 5-cyclohexadecene-1-one, 6,7-dihydro-1,1,2,3,3-pentamethyl-4(5H)-indanone, 5-cyclohexadecene-1-one, 8-cyclohexadecene-1-one, 9-cycloheptadecene-1-one and cyclopentadecanone;

[0063] xv) Cycloaliphatic aldehydes and ketones, such as, for example, 2,4-dimethyl-3-cyclohexenaldehyde, 2-methyl-4-(2,2,6-trimethyl-cyclohexen-1-yl)-2-butenaldehyde, 4-(4-hydroxy-4-methylpentyl)-3-cyclohexenaldehyde, 4-(4-methyl-3-penten-1-yl)-3-cyclohexenaldehyde, 1-(3,3-dimethylcyclohexyl)-4-pentyl En-1-one, 1-(5,5-dimethyl-1-cyclohexen-1-yl)-4-penten-1-one, 2,3,8,8-tetramethyl-1,2,3,4,5,6,7,8-octahydro-2-naphthenylmethyl ketone, methyl-2,6,10-trimethyl-2,5,9-cyclododecanetrienyl ketone and tert-butyl-(2,4-dimethyl-3-cyclohexen-1-yl) ketone;

[0064] (xvi) Esters of cycloalcohols, such as, for example, 2-tert-butylcyclohexyl acetate, 4-tert-butylcyclohexyl acetate, 2-tert-pentylcyclohexyl acetate, 4-tert-pentylcyclohexyl acetate, decahydro-2-naphthyl acetate, 3-pentyltetrahydro-2H-pyran-4-yl acetate, decahydro-2,5,5,8a-tetramethyl-2-naphthyl acetate, 4,7-bridged methylene-3a,4,5,6,7,7a-hexahydro-5- or 6-indole acetate, 4,7-bridged methylene-3a,4,5,6,7,7a-hexahydro-5- or 6-indole propionate, 4,7-bridged methylene-3a,4,5,6,7,7a-hexahydro-5- or 6-indole isobutyrate and 4,7-bridged methylene octahydro-5- or 6-indole acetate;

[0065] xvii) Esters of cyclic aliphatic carboxylic acids, such as allyl 3-cyclohexyl propionate, allyl cyclohexyloxyacetate, methyl dihydrojasmonic acid ester, methyl jasmonic acid ester, methyl 2-hexyl-3-oxocyclopentanecarboxylate, ethyl 2-ethyl-6,6-dimethyl-2-cyclohexenecarboxylate, ethyl 2,3,6,6-tetramethyl-2-cyclohexenecarboxylate and ethyl 2-methyl-1,3-dioxolane-2-ethyl acetate;

[0066] xviii) Esters of aryl aliphatic alcohols and aliphatic carboxylic acids, such as benzyl acetate, benzyl propionate, benzyl isobutyrate, benzyl isovalerate, 2-phenylethyl acetate, 2-phenylethyl propionate, 2-phenylethyl isobutyrate, 2-phenylethyl isovalerate, 1-phenylethyl acetate, α-trichloromethylbenzyl acetate, α,α-dimethylphenylethyl acetate, α,α-dimethylphenylethyl butyrate, cinnamon acetate, 2-phenoxyethyl isobutyrate, and 4-methoxybenzyl acetate;

[0067] xix) Aromatic aliphatic ethers and their acetals, such as, for example, 2-phenylethyl methyl ether, 2-phenylethyl isopentyl ether, 2-phenylethyl cyclohexyl ether, 2-phenylethyl-1-ethoxyethyl ether, phenylacetaldehyde dimethyl acetal, phenylacetaldehyde diethyl acetal, 2-phenylpropanal dimethyl acetal, phenylacetaldehyde glycerol acetal, 2,4,6-trimethyl-4-phenyl-1,3-dioxane, 4,4a,5,9b-tetrahydroindo[1,2-d]-m-dioxin and 4,4a,5,9b-tetrahydro-2,4-dimethylindo[1,2-d]-m-dioxin;

[0068] xx) Aromatic and aryl aldehydes and ketones, such as benzaldehyde; phenylacetaldehyde, 3-phenylpropanal, 2-phenylpropanal, 4-methylbenzaldehyde, 4-methylphenylacetaldehyde, 3-(4-ethylphenyl)-2,2-dimethylpropanal, 2-methyl-3-(4-isopropylphenyl)propanal, 2-methyl-3-(4-tert-butylphenyl)propanal, 3-(4-tert-butylphenyl)propanal, cinnamaldehyde, α-butylcinnamaldehyde, α-pentylcinnamaldehyde, α-hexylcinnamaldehyde, 3-methyl-5-phenylpentanal, 4-methoxybenzaldehyde, 4-hydroxy-3-methoxybenzaldehyde, 4-hydroxy-3-ethoxybenzaldehyde, 3,4-methylene-dioxybenzaldehyde, 3,4-dimethoxybenzaldehyde, 2-methyl-3-(4-methoxy) 2-Methyl-3-(4-methylenedioxyphenyl)propanal, acetophenone, 4-methylacetophenone, 4-methoxyacetophenone, 4-tert-butyl-2,6-dimethylacetophenone, 4-phenyl-2-butanone, 4-(4-hydroxyphenyl)-2-butanone, 1-(2-naphthyl)acetone, benzophenone, 1,1,2,3,3,6-hexamethyl-5-indanylmethyl ketone, 6-tert-butyl-1,1-dimethyl-4-indanylmethyl ketone, 1-[2,3-dihydro-1,1,2,6-tetramethyl-3-(1-methylethyl)-1H-5-indanyl]acetone and 5′,6′,7′,8′-tetrahydro-3′,5′,5′,6′,8′,8′-hexamethyl-2-naphthyl acetone;

[0069] xxi) Aromatic and aryl carboxylic acids and their esters, such as benzoic acid, phenylacetic acid, methyl benzoate, ethyl benzoate, hexyl benzoate, benzyl benzoate, methyl phenylacetate, ethyl phenylacetate, geraniol phenylacetate, phenylethyl phenylacetate, methyl cinnamate, ethyl cinnamate, benzyl cinnamate, phenylethyl cinnamate, cinnamyl cinnamate, allyl phenoxyacetate, methyl salicylate, isoamyl salicylate, hexyl salicylate, cyclohexyl salicylate, cis-3-hexenyl salicylate, benzyl salicylate, phenylethyl salicylate, methyl 2,4-dihydroxy-3,6-dimethylbenzoate, ethyl 3-phenylglyceroate, and ethyl 3-methyl-3-phenylglyceroate;

[0070] xxii) Nitrogen-containing aromatic compounds, such as, for example, 2,4,6-trinitro-1,3-dimethyl-5-tert-butylbenzene, 3,5-dinitro-2,6-dimethyl-4-tert-butylacetophenone, cinnamonitrile, 5-phenyl-3-methyl-2-pentenonitrile, 5-phenyl-3-methylpentenonitrile, methyl anthranilate, N-methyl anthranilate, methyl anthranilate and Schiff bases of 7-hydroxy-3,3,7-dimethyloctanal, 2-methyl-3-(4-tert-butylphenyl)propanal or 2,4-dimethyl-3-cyclohexenecarboxaldehyde, 6-isopropylquinoline, 6-isobutylquinoline, 6-sec-butylquinoline, indole, methylindole, 2-methoxy-3-isopropylpyrazine and 2-isobutyl-3-methoxypyrazine;

[0071] xxiii) Phenols, phenyl ethers, and phenyl esters, such as artemisia argyi, anethole, eugenol, eugenyl methyl ether, isoeugenol, isoeugenyl methyl ether, thymol, carvacrol, diphenyl ether, β-naphthyl methyl ether, β-naphthyl ethyl ether, β-naphthyl isobutyl ether, 1,4-dimethoxybenzene, eugenol acetate, 2-methoxy-4-methylphenol, 2-ethoxy-5-(1-propenyl)phenol, and p-cresol phenylacetic acid;

[0072] xxiv) Heterocyclic compounds, such as, for example, 2,5-dimethyl-4-hydroxy-2H-furan-3-one, 2-ethyl-4-hydroxy-5-methyl-2H-furan-3-one, 3-hydroxy-2-methyl-4H-pyran-4-one, 2-ethyl-3-hydroxy-4H-pyran-4-one;

[0073] (xxv) lactones, such as, for example, 1,4-octanolide, 3-methyl-1,4-octanolide, 1,4-nonanolide, 1,4-decanolide, 8-decen-1,4-lactone, 1,4-undecanolide, 1,4-dodecanolide, 1,5-decanolide, 1,5-dodecanolide, 1,15-pentadecanolide, cis- and trans-1′-pentadecanolide, cis- and Trans-12-pentadene-1,15-lactone, 1,16-hexadecyllactone, 9-hexadecyl-1,16-lactone, 10-oxa-1,16-hexadecyllactone, 11-oxa-1,16-hexadecyllactone, 12-oxa-1,16-hexadecyllactone, vinyl-1,12-dodecanoic acid ester, vinyl-1,13-tridecanoic acid ester, coumarin, 2,3-dihydrocoumarin, and octahydrocoumarin.

[0074] Naturally occurring exudates, such as essential oils extracted from plants, can also be used as aromatic components in this invention. Essential oils are typically extracted using methods such as steam distillation, solid-phase extraction, cold pressing, solvent extraction, supercritical fluid extraction, aqueous distillation, or simultaneous distillation-extraction. Essential oils can be derived from several different parts of a plant, including, for example, leaves, flowers, roots, buds, twigs, rhizomes, heartwood, bark, resin, seeds, and fruits. Major plant families from which essential oils are extracted include Asteraceae, Myrtaceae, Lauraceae, Lamiaceae, Rutaceae, and Zingiberaceae. The oil is "essential" in the sense that it carries the unique aroma or essence of the plant.

[0075] Those skilled in the art will understand that essential oils are complex mixtures, typically composed of dozens or hundreds of components. Most of these components have an isoprene-like skeleton, having 10 carbon atoms (monoterpenes), 15 carbon atoms (sesquiterpenes), or 20 carbon atoms (diterpenes). Other components, such as alcohols, aldehydes, esters, and phenols, may also be found in smaller quantities. However, in the context of practicing aromatherapy preparations, an individual essential oil is generally considered a single component. Therefore, an individual essential oil can be considered a single aromatic component used for the purposes of this invention.

[0076] Specific examples of essential oils used as aromatic components in this invention include cypress oil, juniper oil, cumin oil, cinnamon oil, camphor oil, rosewood oil, ginger oil, basil oil, eucalyptus oil, lemongrass oil, peppermint oil, rosemary oil, spearmint oil, tea tree oil, frankincense oil, chamomile oil, clove oil, jasmine oil, lavender oil, rose oil, ylang-ylang oil, bergamot oil, grapefruit oil, lemon oil, white lemon oil, orange oil, fir needle oil, galbanum oil, geranium oil, grapefruit oil, pine needle oil, wormwood oil, labdanum oil, angelica pubescens oil, oregano oil, mandarin orange oil, sage oil, nutmeg oil, myrtle oil, clove oil, neroli oil, patchouli oil, sandalwood oil, thyme oil, verbena oil, vetiver oil, and wintergreen oil.

[0077] The number of different aromatic components contained in the aromatic preparation will generally be at least 4, preferably at least 6, more preferably at least 8 and most preferably at least 10, such as 10 to 200, more preferably 10 to 100.

[0078] Typically, no single aromatic component will account for more than 70% by weight of the total weight of the aromatic preparation. Preferably, no single aromatic component will account for more than 60% by weight of the total weight of the aromatic preparation, and more preferably, no single aromatic component will account for more than 50% by weight of the total weight of the aromatic preparation.

[0079] In the context of this invention, the term "aromatic formulation" refers to the aromatic components as defined above, plus any optional excipients. Excipients may be included in the aromatic formulation for various purposes, such as as a solvent for insoluble or poorly soluble components, as a diluent for more effective components, or for controlling the vapor pressure and evaporation characteristics of the aromatic formulation. Excipients may possess many of the characteristics of aromatic components, but they themselves do not have a strong odor. Therefore, excipients can be distinguished from aromatic components because they can be added to the aromatic formulation in high proportions (e.g., 30% by weight or even 50% by weight of the total weight of the aromatic formulation) without significantly altering the odor quality of the aromatic formulation. Some examples of suitable excipients include ethanol, isopropanol, diethylene glycol monoethyl ether, dipropylene glycol, diethyl phthalate, and triethyl citrate. Mixtures of any of the above materials may also be suitable.

[0080] Suitable aromatic formulations for use in this invention comprise a mixture of at least 10 aromatic components selected from the following: hydrocarbons i); aliphatic and aryl alcohols ii); aliphatic aldehydes and their acetals iv); aliphatic carboxylic acids and their esters viii); acyclic terpene alcohols ix); cyclic terpene aldehydes and ketones xii); cyclic ethers and cyclic aliphatic ethers xiii); esters of cyclic alcohols xvi); esters of aryl aliphatic alcohols and aliphatic carboxylic acids xviii); aryl aliphatic ethers and their acetals xix); aromatic and aryl aliphatic aldehydes and ketones xx); and aromatic and aryl aliphatic carboxylic acids and their esters xxi); as further described and exemplified above.

[0081] The content of the aromatic component is preferably in the range of 50% to 100% by weight based on the total weight of the aromatic preparation, more preferably 60% to 100% and most preferably 75% to 100%; if necessary, one or more excipients (as described above) constitute the balance of the aromatic preparation.

[0082] Based on the total weight of the beneficial agent delivery particles, the aromatic preparation typically comprises about 10% to about 60%, preferably about 20% to about 40% by weight. The amount of the aromatic preparation can be measured by taking a slurry of the beneficial agent delivery particles, extracting it into ethanol, and measuring it by liquid chromatography.

[0083] The beneficial agent delivery particles of the present invention are suitable for inclusion in all physical forms of laundry treatment compositions.

[0084] In a typical laundry treatment composition according to the invention, the content of beneficial agent delivery particles is typically 0.01-10%, preferably 0.1-5%, more preferably 0.3-3% (by weight based on the total weight of the composition).

[0085] Product Form

[0086] The laundry treatment composition according to the present invention is preferably in liquid form.

[0087] In the context of this invention, the term "liquid" refers to a composition in which the continuous phase or main component is liquid, and the composition is flowable at 15°C and above. Therefore, the term "liquid" can include emulsions, suspensions, and compositions having a flowable but firmer consistency, referred to as gels or pastes. At 25°C and 21s -1 At a certain shear rate, the viscosity of the composition can suitably be in the range of about 200 to about 10,000 mPa·s. This shear rate is the shear rate typically applied to the liquid when it is poured from the bottle. Pourable liquid compositions typically have a viscosity of 200 to 2,500 mPa·s, preferably 200 to 1,500 mPa·s.

[0088] The viscosity of the liquid composition as a pourable gel is typically from 1,500 mPa·s to 6,000 mPa·s, preferably from 1,500 mPa·s to 2,000 mPa·s.

[0089] Product Type

[0090] Preferably, the laundry treatment composition according to the invention is a laundry detergent.

[0091] Laundry detergent

[0092] In the context of this invention, the term "laundry detergent" refers to a composition formulated for and capable of wetting and cleaning household garments such as clothes, linen products, and other household textiles. The term "linen products" is frequently used to describe certain types of laundry items, including sheets, pillowcases, towels, tablecloths, napkins, and uniforms. Textiles may include woven fabrics, nonwoven fabrics, and knitted fabrics; and may include natural or synthetic fibers such as silk fibers, linen fibers, cotton fibers, polyester fibers, polyamide fibers such as nylon, acrylic fibers, acetate fibers, and mixtures thereof, including cotton and polyester blends.

[0093] Examples of laundry detergents include heavy-duty detergents for the wash cycle of automatic washing machines, as well as delicate and color-care detergents, such as those suitable for washing delicate garments (e.g., those made of silk or wool) by hand or in the wash cycle of an automatic washing machine.

[0094] To provide a cleaning effect, laundry detergents according to the invention typically contain at least 3%, for example 5-60% (by weight based on the total weight of the composition) of one or more detergency surfactants. The choice and amount of detergency surfactant depends on the intended use of the laundry detergent. For example, different surfactant systems can be selected for hand-wash products and for products used in different types of automatic washing machines. The total amount of surfactant present also depends on the intended end use and can be as high as 60% (by weight based on the total weight of the composition) in a fully formulated product, in compositions for hand-washing fabrics. In compositions for machine-washing fabrics, an amount of 5-40%, for example 15-35% (by weight based on the total weight of the composition) is generally suitable.

[0095] In the context of this invention, the term "stain-removing surfactant" refers to a surfactant that provides a stain-removing (i.e., cleaning) effect to clothing to be washed as part of a household laundry method.

[0096] Preferred detergency surfactants may be selected from non-soap anionic surfactants, nonionic surfactants, and mixtures thereof.

[0097] Non-soap anionic surfactants are primarily used to promote the removal of particulate contaminants. The non-soap anionic surfactants used in this invention are typically salts of organic sulfuric and sulfonic acids having an alkyl group containing about 8 to about 22 carbon atoms, the term "alkyl" referring to the alkyl moiety including a higher acyl group. Examples of such materials include alkyl sulfates, alkyl ether sulfates, alkylaryl sulfonates, α-olefin sulfonates, and mixtures thereof. The alkyl group preferably contains 10 to 18 carbon atoms and may be unsaturated. The alkyl ether sulfate may contain one to ten ethylene oxide or propylene oxide units per molecule, and preferably one to three ethylene oxide units per molecule. The counterions of the anionic surfactant are typically alkali metals such as sodium or potassium; or ammonia-containing counterions such as monoethanolamine (MEA), diethanolamine (DEA), or triethanolamine (TEA). Mixtures of such counterions may also be used.

[0098] Preferred types of non-soap anionic surfactants used in this invention include alkylbenzene sulfonates, particularly straight-chain alkylbenzene sulfonates (LAS) having an alkyl chain length of 10 to 18 carbon atoms. Commercial LAS are mixtures of closely related isomers and homologues of alkyl chains, each containing a sulfonated aromatic ring at the "para" position and linked to a straight-chain alkyl chain at any position except the terminal carbon. The straight-chain alkyl chain typically has a chain length of 11 to 15 carbon atoms, and the primary material has a carbon content of approximately C0.05. 12The chain length. Except for the 1-phenyl isomer, each alkyl chain homologue consists of a mixture of all possible sulfonylenous isomers. LAS are typically formulated into compositions in acid (i.e., HLAS) form and then neutralized in situ, at least partially.

[0099] Also suitable are alkyl ether sulfates having 10-18, more preferably 12-14, straight-chain or branched alkyl groups and containing an average of 1-3 EO units per molecule. A preferred example is sodium lauryl ether sulfate (SLES), wherein the C12 lauryl alkyl group has been ethoxylated, with an average of 3 EO units per molecule.

[0100] Some alkyl sulfate surfactants can be used, such as non-ethoxylated primary and secondary alkyl sulfates with alkyl chain lengths of 10-18.

[0101] Mixtures of any of the above materials may also be used. Preferred mixtures of non-soap anionic surfactants used in this invention include linear alkylbenzene sulfonates (preferably C11-C15 linear alkylbenzene sulfonates) and sodium lauryl ether sulfate (preferably having an average ethoxylated C11-C15 alkylbenzene sulfonate). 10 -C 18 Alkyl sulfates).

[0102] In the laundry detergent according to the invention, the total content of non-soap anionic surfactants may suitably be in the range of 5% to 30% (based on the total weight of the composition by weight).

[0103] Nonionic surfactants can provide enhanced performance for removing highly hydrophobic oil stains and for cleaning hydrophobic polyester and polyester / cotton blend fabrics.

[0104] The nonionic surfactants used in this invention are typically polyoxyalkylene compounds, i.e., reaction products of alkylene oxides (such as ethylene oxide or propylene oxide, or mixtures thereof) with starter molecules having hydrophobic groups and reactive hydrogen atoms (which react with the alkylene oxide). Such starter molecules include alcohols, acids, amides, or alkylphenols. When the starter molecule is an alcohol, the reaction product is called an alcohol alkoxylate. Polyoxyalkylene compounds can have a wide variety of block and mixed (random) structures. For example, they can contain a single block of alkylene oxide, or they can be diblock or triblock alkoxylates. Within a block structure, the blocks can be all ethylene oxide or all propylene oxide, or the blocks can contain a mixture of mixed blocks of alkylene oxides. Examples of such materials include C8 to C94 compounds having an average of 5 to 25 moles of ethylene oxide per mole of alkylphenol. 22 Alkylphenol ethoxylates; and fatty alcohol ethoxylates, such as those having an average of 2 to 40 moles of ethylene oxide per mole of alcohol, with C8 to C96 esters. 18Primary or secondary straight-chain or branched alcohol ethoxylates.

[0105] The preferred type of nonionic surfactant used in this invention comprises aliphatic C8 to C96 surfactants having an average of 3 to 20, more preferably 5 to 10, moles of ethylene oxide per mole of alcohol. 18 C is preferred 12 To C 15 Primary straight-chain alcohol ethoxylates.

[0106] A mixture of any of the above materials may also be used.

[0107] In the laundry detergent according to the invention, the total content of nonionic surfactants may suitably be in the range of 0 to 25% (based on the total weight of the composition by weight).

[0108] The laundry detergent according to the present invention is preferably in liquid form.

[0109] The liquid laundry detergent according to the invention typically contains 5-95%, preferably 10-90%, more preferably 15-85% water (by weight based on the total weight of the composition). The composition may also contain a non-aqueous carrier, such as a water-soluble co-solvent and a phase stabilizer. Such materials are typically low molecular weight, water-soluble or water-miscible organic liquids, such as C1 to C5 monohydric alcohols (e.g., ethanol and n-propanol or isopropanol); C2 to C6 diols (e.g., monopropylene glycol and dipropylene glycol); C3 to C9 triols (e.g., glycerol); polyethylene glycol with a weight-average molecular weight (Mw) of about 200-600; C1 to C3 alkanolamines, such as mono, di, and triethanolamines; and alkyl aryl sulfonates having up to 3 carbon atoms in the lower alkyl group (e.g., sodium and potassium xylene, sodium and potassium toluene, sodium and potassium ethylbenzene, and sodium and potassium isopropylbenzene(cumene)sulfonate).

[0110] A mixture of any of the above materials may also be used.

[0111] When included in a liquid laundry detergent according to the invention, the non-aqueous carrier may be present in an amount of 0.1-20%, preferably 1-15%, more preferably 3-12% (by weight based on the total weight of the composition).

[0112] builder

[0113] The laundry detergent according to the present invention may contain one or more builder agents. The builder agents enhance or maintain the cleaning efficiency of the surfactant, primarily by reducing the hardness of the water. This is achieved through sequestration (retaining hard minerals in solution), precipitation (forming insoluble substances), or ion exchange (exchanging charged particles).

[0114] The detergent builders used in this invention can be organic or inorganic, or mixtures thereof. Non-phosphate builders are preferred.

[0115] The inorganic non-phosphate detergent additives used in this invention include hydroxides, carbonates, silicates, zeolites, and mixtures thereof.

[0116] The hydroxide detergents suitable for use in this invention include sodium hydroxide and potassium hydroxide.

[0117] Suitable carbonate detergent builders for use in this invention include mixtures or individual, anhydrous or partially hydrated alkali metal carbonates, bicarbonates, or sesquicarbonates. Preferably, the alkali metal is sodium and / or potassium, with sodium carbonate being particularly preferred.

[0118] Suitable silicate detergent builders include amorphous and / or crystalline forms of alkali metal (such as sodium) silicates. Preferred are crystalline layered sodium silicate (sheet silicate) of general formula (I):

[0119] NaMSi x O 2x+1 ·yH2O(I)

[0120] Where M is sodium or hydrogen, x is a number from 1.9 to 4, preferably 2 or 3, and y is a number from 0 to 20. Sodium disilicate in the above formula where M is sodium and x is 2 is particularly preferred. Such materials can be prepared with different crystal structures, referred to as α, β, γ, and δ phases, with δ-sodium disilicate being the most preferred.

[0121] Zeolites are naturally occurring or synthetic compounds containing (SiO4). 4- and (AlO4) 5- Tetrahedral crystalline aluminum silicate, in its crystalline form, shares oxygen-bridge vertices and forms a cage-like structure. The ratio of oxygen, aluminum, and silicon is O:(Al+Si)=2:1. This framework acquires its negative charge by replacing some of the Si with Al. The negative charge is neutralized by cations, and under normal conditions, the framework is sufficiently open to contain active water molecules. Suitable zeolite detergents for use in this invention can be defined by general formula (II):

[0122] Na x [(AlO2) x (SiO2) y ]·zH2O(II)

[0123] Where x and y are integers of at least 6, the molar ratio of x to y is in the range of about 1 to about 0.5, and z is an integer of at least 5, preferably about 7.5 to about 276, more preferably about 10 to about 264.

[0124] Preferred inorganic non-phosphate detergent additives for use in this invention may be selected from zeolite (having the above general formula (II)), sodium carbonate, sodium δ-disilicate, and mixtures thereof.

[0125] Suitable organic nonphosphate detergent builders for use in this invention include polycarboxylic acids in acid and / or salt form. When using salt form, alkali metals (e.g., sodium and potassium) or alkanol ammonium salts are preferred. Specific examples of such materials include sodium and potassium citrate, sodium and potassium tartrate, sodium and potassium salts of tartrate monosuccinic acid, sodium and potassium salts of tartrate disuccinic acid, sodium and potassium of ethylenediaminetetraacetic acid, sodium and potassium of N-(2-hydroxyethyl)-ethylenediaminetriacetic acid, sodium and potassium of hypozoxytriacetic acid, and sodium and potassium of N-(2-hydroxyethyl)-hypozoxydiacetic acid. Polymeric polycarboxylic acids, such as polymers of unsaturated monocarboxylic acids (e.g., acrylic acid, methacrylic acid, vinylacetic acid, and crotonic acid) and / or unsaturated dicarboxylic acids (e.g., maleic acid, fumaric acid, itaconic acid, mesaconic acid, and citraconic acid and their anhydrides), may also be used. Specific examples of such materials include polyacrylic acid, polymaleic acid, and copolymers of acrylic acid and maleic acid. The polymer may be in the form of an acid, salt, or partially neutralized form, and may suitably have a molecular weight (M) in the range of about 1,000 to 100,000, preferably about 2,000 to about 85,000, more preferably about 2,500 to about 75,000. w ).

[0126] Preferred organic nonphosphate builder for use in the present invention may be selected from polycarboxylic acid esters (e.g., citrate esters) and mixtures thereof in acid and / or salt form.

[0127] A mixture of any of the above materials may also be used.

[0128] Preferably, the content of phosphate detergent in the laundry detergent of the present invention is no more than 1%, more preferably no more than 0.1%, and most preferably 0% (based on the total weight of the composition by weight). In the context of this invention, the term "phosphate detergent" refers to alkali metal, ammonium, and alkane ammonium salts of polyphosphates, orthophosphates, and / or metaphosphates (e.g., sodium tripolyphosphate).

[0129] When included, the total content of the building block can be from about 0.1% to about 80%, preferably from about 0.5% to about 50% (based on the total weight of the composition by weight).

[0130] Polymer cleaning enhancer

[0131] The laundry detergent according to the invention may also contain one or more polymer cleaning enhancers, such as anti-redeposition polymers, stain-removing polymers, and mixtures thereof.

[0132] Anti-redeposition polymers stabilize contaminants in the washing solution, thereby preventing redeposition. Suitable anti-redeposition polymers for use in this invention include alkoxylated polyethyleneimine. Polyethyleneimine is a material containing ethyleneimine units -CH2CH2NH-, and when branched, the hydrogen on the nitrogen atom is replaced by ethyleneimine units from another chain. Preferred alkoxylated polyethyleneimines for use in this invention have a weight-average molecular weight (M) of about 300 to about 10,000. w The polyethyleneimine backbone is a linear or branched chain. It can be branched to the extent that it is a dendritic polymer. Alkoxylation can typically be ethoxylation or propoxylation, or a mixture of both. When nitrogen atoms are alkoxylated, the preferred average degree of alkoxylation for each modification is 10 to 30, preferably 15 to 25 alkoxy groups. Preferred materials are ethoxylated polyethyleneimines having an average degree of ethoxylation of 10 to 30, preferably 15 to 25 ethoxy groups per ethoxylated nitrogen atom in the polyethyleneimine backbone. Another suitable type of anti-redeposition polymer for use in this invention includes cellulose esters and ethers, such as sodium carboxymethyl cellulose.

[0133] A mixture of any of the above materials may also be used.

[0134] When included, the total content of the anti-redeposition polymer may be 0.05-6%, more preferably 0.1-5% (based on the total weight of the composition by weight).

[0135] Stain-removing polymers (SRPs) help improve the separation of stains from fabrics by modifying the fabric surface during the washing process. The affinity between the chemical structure of SRPs and the target fibers promotes the adsorption of SRPs on the fabric surface.

[0136] The SRP used in this invention may comprise various charged (e.g., anionic) and uncharged monomer units, and the structure may be linear, branched, or star-shaped. The SRP structure may also include end-capping groups to control molecular weight or modify polymer properties, such as surface activity. The weight-average molecular weight (M) of the SRP... w The range may suitably be from about 1,000 to about 20,000, and preferably from about 1,500 to about 10,000.

[0137] The SRP used in this invention may suitably be selected from copolyesters of dicarboxylic acids (e.g., adipic acid, phthalic acid, or terephthalic acid), glycols (e.g., ethylene glycol or propylene glycol), and polyglycols (e.g., polyethylene glycol or polypropylene glycol). The copolyester may also include monomer units substituted with anionic groups, such as sulfonated isophthaloyl units. Examples of such materials include oligomers prepared by ester transfer / oligopolymerization of poly(ethylene glycol) methyl ether, dimethyl terephthalate (“DMT”), propylene glycol (“PG”), and poly(ethylene glycol”) (“PEG”); partially and fully anionic-terminated oligomers, such as oligomers derived from ethylene glycol (“EG”), PG, DMT, and Na-3,6-dioxa-8-hydroxyoctanesulfonic acid; nonionic-terminated block polyester oligomers, such as combinations of DMT, Me-terminated PEG and EG and / or PG, or DMT, EG and / or PG, Me-terminated PEG and Na-dimethyl-5-sulfoisophthalate, and those produced by copolymerization blocks of ethylene glycol terephthalate or propylene glycol terephthalate with polyethylene oxide or polypropylene oxide terephthalate.

[0138] Other types of SRPs used in this invention include cellulose derivatives, such as hydroxy ether cellulose polymers, C1-C4 alkyl celluloses, and C4 hydroxyalkyl celluloses; polymers having hydrophobic poly(vinyl ester) segments, such as graft copolymers of poly(vinyl ester), such as C1-C6 vinyl esters grafted onto a polyepoxide backbone (e.g., poly(vinyl acetate)); poly(vinyl caprolactam) and related copolymers with monomers such as vinylpyrrolidone and / or dimethylaminoethyl methacrylate; and polyester-polyamide polymers prepared by condensation of adipic acid, caprolactam, and polyethylene glycol.

[0139] Preferred SRPs used in this invention comprise a copolyester formed by the condensation of terephthalate and glycol (preferably 1,2-propanediol), and further comprise end caps formed from repeating units of alkyl-terminated epoxy compounds. Examples of such materials have structures corresponding to general formula (I):

[0140]

[0141] Where R 1 and R 2 They are independent of each other as X-(OC2H4) n -(OC3H6) m ;

[0142] Where X is C 1-4 Alkyl groups, preferably methyl groups;

[0143] n can be 12-120, preferably a number between 40-50;

[0144] m is a number from 1 to 10, preferably a number from 1 to 7; and

[0145] 'a' is a number from 4 to 9.

[0146] Since m, n, and a are average values, they are not necessarily integers for a large number of polymers.

[0147] A mixture of any of the above materials may also be used.

[0148] When included, the total SRP content may be 0.1-10%, preferably 0.3-7%, more preferably 0.5-5% (based on the total weight of the composition by weight).

[0149] Transition metal ion chelating agents

[0150] Liquid or particulate laundry detergents according to the invention may contain one or more chelating agents for transition metal ions (e.g., iron, copper, and manganese). Such chelating agents can help improve the stability of the composition and prevent the decomposition of certain components, for example, by transition metal catalysis.

[0151] Suitable transition metal ion chelating agents include phosphonates in acid and / or salt forms. When using salt forms, alkali metals (e.g., sodium and potassium) or alkanol ammonium salts are preferred. Specific examples of such materials include aminotris(methylenephosphonic acid) (ATMP), 1-hydroxyvinyl diphosphonic acid (HEDP), and diethylenetriaminepenta(methylenephosphonic acid) (DTPMP) and their respective sodium or potassium salts. HEDP is preferred. Mixtures of any of the above materials may also be used.

[0152] When included, the transition metal ion chelating agent may be present in an amount ranging from about 0.1 to about 10%, preferably from about 0.1 to about 3% (based on the total weight of the composition by weight).

[0153] fatty acid

[0154] The laundry detergent according to the present invention may, in certain circumstances, contain one or more fatty acids and / or their salts.

[0155] In the context of this invention, suitable fatty acids include aliphatic carboxylic acids of the formula RCOOH, wherein R is a straight-chain or branched alkyl or alkenyl chain containing 6 to 24, more preferably 10 to 22, and most preferably 12 to 18 carbon atoms and 0 or 1 double bond. Preferred examples of such materials include saturated C 12-18 Fatty acids, such as lauric acid, myristic acid, palmitic acid, or stearic acid; and 50 to 100% of which (based on the total weight of the mixture) are composed of saturated C 12-18 A mixture of fatty acids. Such mixtures can typically be derived from natural fats and / or optionally hydrogenated natural oils (such as coconut oil, palm kernel oil, or tallow).

[0156] Fatty acids can exist in the form of their sodium, potassium, or ammonium salts and / or as soluble salts of organic bases such as mono-, di-, or triethanolamine.

[0157] A mixture of any of the above materials may also be used.

[0158] When included, fatty acids and / or their salts may be present in amounts ranging from about 0.25 to 5%, more preferably 0.5 to 5%, and most preferably 0.75 to 4% (by weight based on the total weight of the composition).

[0159] For the purposes of structural explanation, fatty acids and / or their salts (as defined above) are not included in the content of surfactants or builder agents in the formulation.

[0160] rheology modifiers

[0161] Liquid laundry detergents according to the invention may contain one or more rheology modifiers. Examples of such materials include polymer thickeners and / or structuring agents, such as hydrophobically modified alkali-swellable emulsion (HASE) copolymers. Exemplary HASE copolymers for use in the invention comprise linear or crosslinked copolymers prepared by addition polymerization of a monomer mixture comprising at least one acidic vinyl monomer, such as (meth)acrylic acid (i.e., methacrylic acid and / or acrylic acid); and at least one associating monomer. The term "associating monomer" in the context of the invention refers to a monomer having an olefinically unsaturated moiety (for addition polymerization with other monomers in the mixture) and a hydrophobic moiety. Preferred types of associating monomers comprise a polyoxyalkylene moiety between the olefinically unsaturated moiety and the hydrophobic moiety. Preferred HASE copolymers for use in the invention comprise (meth)acrylic acid with (i) a monomer selected from linear or branched C8-C... 40 Alkyl (preferably straight-chain C) 12 -C 22 (i) at least one associating monomer of alkyl)polyethoxylated (meth)acrylate; and (ii) a linear or crosslinked copolymer prepared by addition polymerization of at least one other monomer selected from C1-C4 alkyl esters of (meth)acrylate, polyvinyl acetate monomers (e.g., maleic acid, maleic anhydride and / or salts thereof) and mixtures thereof. The polyethoxylated portion of the associating monomer (i) typically comprises about 5 to about 100, preferably about 10 to about 80, more preferably about 15 to about 60 oxyethylidene repeating units.

[0162] A mixture of any of the above materials may also be used.

[0163] When included, the polymeric thickener may be present in an amount of 0.1-5% (by weight based on the total weight of the composition).

[0164] The liquid laundry detergent according to the invention can also have its rheological properties modified by using one or more external structuring agents that form a structured network within the composition. Examples of such materials include hydrogenated castor oil, microfibrillated cellulose, and citrus pomace fiber. The presence of the external structuring agent can provide shear-thinning rheology and can also enable materials (e.g., encapsulants and visual cues) to be stably suspended in the liquid.

[0165] enzymes

[0166] The laundry detergent according to the invention may contain an effective amount of one or more enzymes selected from pectinase, protease, amylase, cellulase, lipase, mannanase, and mixtures thereof. The enzymes are preferably present together with corresponding enzyme stabilizers.

[0167] When the composition is diluted to 1% (by weight based on the total weight of the composition) using demineralized water, the liquid laundry detergent according to the invention preferably has a pH of 5-9, more preferably 6-8.

[0168] Other optional ingredients

[0169] The laundry treatment compositions of the present invention may contain additional optional ingredients to enhance performance and / or user acceptability. Examples of such ingredients include foam enhancers, preservatives (e.g., bactericides), antioxidants, sunscreens, colorants, pearlescent agents and / or opacifiers, and tinting dyes. Each of these ingredients is present in an amount that effectively achieves its purpose. Typically, these optional ingredients are individually contained in an amount of up to 5% by weight (based on the total weight of the composition).

[0170] Packaging and quantitative feeding

[0171] The laundry treatment composition of the present invention can be packaged as a unit dose in a polymeric film soluble in wash water. Alternatively, the composition of the present invention can be provided in a multi-dose plastic package having a top or bottom closure. The dosing measurement can be provided as part of the cap or as an integrated system with the package.

[0172] The method of treating fabrics with the laundry detergent according to the invention will often involve diluting a certain amount of detergent to obtain a washing solution, and washing the fabrics with the washing solution thus formed. The method of washing fabrics can be suitably carried out in an automatic washing machine, or it can be carried out manually.

[0173] In automatic washing machines, a certain amount of detergent is typically placed in the dispenser and from there rinsed into the machine by the water flowing into it, thus forming a washing solution. Alternatively, a certain amount of detergent can be added directly to the drum. The dosage range for a typical front-loading washing machine (using 10 to 15 liters of water to form the washing solution) is from about 10 ml to about 60 ml, preferably about 15 to 40 ml. The dosage for a typical top-loading washing machine (using 40-60 liters of water to form the washing solution) can be higher, for example, up to about 100 ml. Lower dosages of detergent (e.g., 50 ml or less) can be used for hand washing methods (using about 1 to 10 liters of water to form the washing solution). Subsequent rinsing and drying of the clothes are preferred. Any water input during any optional rinsing steps is not included when determining the volume of the washing solution.

[0174] Clothes drying can be done in an automatic dryer or outdoors.

[0175] The invention will now be further described with reference to the following non-limiting embodiments.

[0176] Example

[0177] Unless otherwise stated, all weight percentages are based on total weight.

[0178] Melamine-formaldehyde core-shell particles were prepared, which have a melamine-formaldehyde shell and a core containing a model fragrance of 15 components. The average particle diameter is about 13 μm and the zeta potential is about -20 mV (measured as described above). The particles were obtained in an aqueous slurry with a solids content of about 30% by weight.

[0179] Example 1

[0180] A water-based slurry containing 0.7g of core-shell particles was diluted with 25g of water, and the diluted slurry was placed in a reaction vessel. The coating was achieved through a two-stage process, involving the sequential addition of coating components (melamine and folic acid) to the core-shell particles at a 50% by weight ratio. To form the coating, melamine was added to the slurry of core-shell particles in the reaction vessel, and the mixture was stirred at 70°C for 10 minutes. Then, folic acid was added to the reaction vessel, and the mixture was stirred at 70°C for 10 minutes. The mixture of melamine and folic acid formed a complex. The mixture was cooled in ice, and the complex precipitated onto the surface of the core-shell particles to form the coating.

[0181] Successful coating of core-shell particles was confirmed by high-resolution SEM imaging.

[0182] Example 2

[0183] Dilute the aqueous slurry with water (×4), place it in a reaction vessel, and heat to 62°C. Add the coating components (melamine and BTCA) to the slurry of the core-shell particles in the reaction vessel, with the coating components accounting for 50% of the weight of the core-shell particles. The mixture of melamine and BTCA forms a composite. Upon cooling, the composite precipitates onto the surface of the core-shell particles to form a coating.

[0184] Comparison

[0185] Dilute 0.7g of water-based slurry with 25g of water and stir at 70°C for 15 minutes, then cool in ice. No coating components were added.

[0186] To test for leakage of fragrance from the core-shell particles, 1 ml of test particle slurry was mixed with 9 ml of laundry liquid with the ingredients shown in Table 1.

[0187] Table 1

[0188] Element Weight % (active ingredient) <![CDATA[C 12-14 Linear alkylbenzene sulfonic acid (LAS) 11.2 <![CDATA[C 12-15 Alcohol ethoxylates (7EO) 8.4 SLES(3EO) 8.4 Monopropylene glycol 8.0 monoethanolamine To pH 8.3 Water, minor ingredients Appropriate amount

[0189] Each test mixture was then placed on a drum for 24 hours, followed by centrifugation at 11,000 rpm for 30 minutes. The supernatant was then removed and filtered through a 3.1 μm filter. 1 ml of the filtrate was then transferred to a 20 ml headspace vial. The headspace above the filtrate was measured after incubation at 40 °C for 10 minutes on a CombiPAL autosampler. Sampling was performed using PDMS / Carboxen / DVB fibers with an exposure time of 60 seconds. The fibers were then desorbed at 270 °C for 5 minutes at the inlet of an Agilent 6890 gas chromatograph. Separation was achieved using a 30 m BPX-5 capillary column. Peak identification was performed using an Agilent 5973N inert mass detector combined with appropriate software / NIST libraries. The total fragrance content was given by summing the integrated peaks. A calibration plot constructed by adding a known amount of free fragrance to the model laundry detergent allowed the results to be converted into a percolation percentage plot.

[0190] The results showed that, compared with the uncoated control particles, the coated particles of Example 1 according to the present invention reduced fragrance leakage by 25% when added to the laundry detergent. Compared with the uncoated control particles, the coated particles of Example 2 according to the present invention reduced fragrance leakage by 9% when added to the laundry detergent.

[0191] The coating is removed when the laundry detergent is diluted during the washing process (typically 35 ml of liquid to 21 L of water).

[0192] In this way, the particles of the present invention provide improved stability of the fragrance in the product against leakage, while providing an enhanced fragrance experience in the early stages after washing.

Claims

1. A beneficial agent delivery particle having a core-shell structure, wherein a porous shell of polymeric material encloses a core containing the beneficial agent; wherein the pores in the shell are at least partially blocked by a washable, removable coating disposed on the outer surface of the shell; characterized in that... The washable coating is formed from a deposited melamine / acid complex, wherein the melamine / acid complex originates from the combination of melamine and a polyfunctional organic acid, and wherein the polyfunctional organic acid is selected from 1,2,3,4-butanediol, folic acid, and mixtures thereof; and The beneficial agent delivery particles are prepared by a method in which the melamine, followed by the polyfunctional organic acid, is mixed into a slurry of pre-formed core-shell particles; wherein the slurry of pre-formed core-shell particles is a dilute aqueous slurry with a water content of at least 60% based on the total weight; the slurry is heated to at least 50°C; and then cooled.

2. The particles according to claim 1, wherein the beneficial agent is an aromatic preparation comprising a mixture of at least 10 aromatic components selected from: hydrocarbons; aliphatic and aryl aliphatic alcohols; aliphatic aldehydes and their acetals; aliphatic carboxylic acids and their esters; acyclic terpenoid alcohols; cyclic terpenoid aldehydes and ketones; cyclic ethers; esters of cyclic alcohols; esters of aryl aliphatic alcohols and aliphatic carboxylic acids; aryl aliphatic ethers and their acetals; aromatic aldehydes and ketones; and aromatic carboxylic acids and their esters.

3. The particles according to claim 2, wherein the cyclic ether is a cyclic aliphatic ether.

4. The particles according to claim 2, wherein the aromatic aldehydes and ketones are arylaliphatic aldehydes and ketones.

5. The particles according to claim 2, wherein the aromatic carboxylic acid and its ester are aryl aliphatic carboxylic acids and their esters.

6. The granules according to any one of claims 2 to 5, wherein the aromatic preparation accounts for 20-40% by weight based on the total weight of the granules delivering the beneficial agent.

7. The particles according to any one of claims 1 to 5, wherein the solubility of the melamine / acid complex in distilled water is less than 10 mg / L at 25°C and atmospheric pressure.

8. The particles according to any one of claims 1 to 5, wherein the melamine / acid complex corresponds to the following general formula (I): (I)。 9. A method for preparing beneficial agent delivery particles as defined in any one of claims 1 to 8, wherein melamine, followed by a polyfunctional organic acid, is mixed into a slurry of pre-formed core-shell particles; wherein the slurry of pre-formed core-shell particles is a dilute aqueous slurry with a water content of at least 60% based on the total weight; the slurry is heated to at least 50°C; and then cooled.

10. The method of claim 9, wherein the slurry for the preformed core-shell particles is a dilute aqueous slurry with a water content of at least 80% on a weight basis.

11. The method according to claim 9 or claim 10, wherein the melamine and the polyfunctional organic acid are mixed in a molar ratio of 2:1 to 10:

1.

12. A laundry treatment composition comprising beneficial agent delivery particles as defined in any one of claims 1 to 8.

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