A method for treating fabrics using delivered particles.

Abstract

A method of treating fabric, comprising: contacting the fabric with a treatment composition, the treatment composition comprising a population of delivery particles having a shell comprising a polymeric material that is the reaction product of polyisocyanate and chitosan, and exposing the delivery particles on the surface of the fabric to ultraviolet (UV) light. A consumer product comprising such a treatment composition in a container that blocks or absorbs UV light.

Description

[Technical Field]

[0001] This disclosure relates to a method for treating fabrics with a treatment composition comprising delivery particles having a polyisocyanate / chitosan shell. This disclosure also relates to a consumer product comprising such a treatment composition in a container that blocks or absorbs ultraviolet light. [Background technology]

[0002] Core / shell delivery particles are useful for delivering beneficial agents, such as fragrance materials, at various touchpoints. One of these touchpoints may be when exposed to ultraviolet (UV) light, for example, while drying or while wearing fabric in sunlight.

[0003] While it is generally desirable for delivery particles to have low levels of leakage, it may be desirable to have a certain level of beneficial agent release, for example, via diffusion, before the physical rupture of the capsule. That being said, some delivery particles are very robust even under UV light and do not significantly release beneficial agents such as fragrances without rupturing.

[0004] To enhance emission under UV light, UV-sensitive moieties can be added to the polymer of the delivery particle shell; however, this may have the negative consequences of additional processing steps and / or additional costs. [Overview of the project] [Problems that the invention aims to solve]

[0005] There is a need for a method of treating fabrics with delivery particles that release beneficial agents when exposed to ultraviolet light, such as sunlight. Furthermore, there is a need to protect such delivery particles from ultraviolet light before use to prevent them from prematurely releasing the beneficial agents. [Means for solving the problem]

[0006] The present disclosure relates to a method for treating a fabric, comprising the steps of: contacting the fabric with a treatment composition, wherein the treatment composition comprises a group of delivery particles, the contact step resulting in one or more of the delivery particles adhering to the surface of the fabric, the delivery particles comprising a core and a shell surrounding the core, the core comprising a beneficial agent and the shell comprising a polymer material which is a reaction product of polyisocyanate and chitosan; and exposing the delivery particles on the surface of the fabric to ultraviolet (UV) light, preferably having a wavelength of about 200 nm to about 400 nm, more preferably about 280 nm to about 400 nm.

[0007] The disclosure also relates to a consumer product comprising: a container including a wall material, wherein the wall material is capable of blocking or absorbing ultraviolet light, preferably having a wavelength of about 200 nm to about 400 nm, more preferably about 280 nm to about 400 nm; and a treatment composition contained within the container, wherein the treatment composition comprises a group of delivery particles, each delivery particle comprising a core and a shell surrounding the core, the core comprising a beneficial agent, and the shell comprising a polymer material which is a reaction product of polyisocyanate and chitosan. [Brief explanation of the drawing]

[0008] The drawings in this specification are illustrative in effect and are not intended to be limiting. [Figure 1] The following are cross-sectional views of exemplary consumer products as described in this disclosure. [Figure 2] The consumer product according to this disclosure shows a sleeve positioned on the peripheral wall of the container. [Modes for carrying out the invention]

[0009] This disclosure relates to a method of treating a fabric with a treatment composition containing specific delivery particles and then exposing the fabric (on which the delivery particles are attached) to ultraviolet light such as sunlight.

[0010] The delivery particles of this disclosure are core / shell particles, the shell comprising polymer materials derived from polyisocyanate and chitosan. While not wishing to be bound by theory, the shells of the particles described herein, which may also be fragrance delivery particles, are considered to be robust enough to prevent significant leakage during product storage, but are considered to be sufficiently sensitive to ultraviolet (UV) light upon exposure to UV light, even during passive activity, to allow for the gradual release of the encapsulated beneficial agent. For example, if such particles adhere to a fabric, this can provide consumers with a pleasant olfactory experience when drying or wearing the fabric outdoors.

[0011] This disclosure also relates to consumer products that include certain materials intended to protect the delivery particles described herein from premature exposure to ultraviolet (UV) light. For example, the treatment composition containing the delivery particles according to this disclosure may be packaged in a container made of a material that blocks or absorbs ultraviolet light.

[0012] The methods, particles, compositions, and products of this disclosure are described in more detail below.

[0013] When used herein, the articles “a” and “an” as used in the claims are understood to mean one or more of the claims or described herein. When used herein, the terms “include,” “includes,” and “including” are meant to be non-limiting. The compositions of the Disclosure may include, may essentially consist of, or may consist of the components of the Disclosure.

[0014] In this specification, the terms “substantially free of” or “substantially free from” may be used. This means that the indicated material is present in minimal amounts and is not intentionally added to the composition to form part of the composition, or, preferably, is not present in an analytically detectable concentration. It means that the composition includes a composition in which the indicated material is present only as an impurity among one of the other materials that are intentionally included. If the indicated material is present, it may be present in a concentration of less than 1% by weight, less than 0.1% by weight, less than 0.01% by weight, or even 0% by weight of the composition.

[0015] As used herein, the term “fabric care composition” includes compositions and formulations designed for treating fabrics. Such compositions include, but are not limited to, laundry cleaning compositions and detergents, fabric softening compositions, fabric strengthening compositions, fabric deodorizing compositions, pre-wash detergents, pre-wash treatments, laundry additives, spray products, dry cleaning agents or compositions, wash rinse additives, cleaning additives, post-rinse fabric treatments, ironing aids, unit-dose formulations, delayed-delivery formulations, detergents contained on or in porous substrates or nonwoven sheets, and other suitable forms that may be apparent to those skilled in the art in consideration of the teachings herein. Such compositions may be used as pre-wash treatments, post-wash treatments, or added during the rinse or wash cycle of a laundry operation.

[0016] Unless otherwise noted, all concentrations of components or compositions refer to the active portion of that component or composition, excluding impurities that may be present in the commercially available source of such components or compositions, such as residual solvents or by-products.

[0017] All temperatures in this specification are in degrees Celsius (°C) unless otherwise specified. Unless otherwise stated, all measurements in this specification are performed at 20°C and atmospheric pressure.

[0018] In all embodiments of the present disclosure, all percentages are based on the weight of the total composition unless otherwise specified. Unless otherwise specified, all ratios are weight ratios.

[0019] All maximum numerical limitations given throughout this specification are to be understood as including all lower numerical limitations as if such lower numerical limitations were expressly recited herein. All minimum numerical limitations shown throughout this specification will include all higher numerical limitations as if such higher numerical limitations were expressly recited herein. All numerical ranges given throughout this specification include any narrower numerical ranges that fall within such broader numerical ranges as if such narrower numerical ranges were all expressly recited herein.

[0020] Method for treating a fabric The present disclosure relates to a method for treating a fabric. Generally, the method includes contacting the fabric with a treatment composition and exposing the fabric to ultraviolet (UV) light.

[0021] The method includes contacting the fabric with a treatment composition. The treatment composition includes a group of delivery particles. The contacting step results in one or more of the delivery particles adhering to the surface of the fabric. The delivery particles include a core and a shell surrounding the core. The core includes a beneficial agent, preferably an aromatic material including one or more perfume raw materials. The shell includes a polymeric material, for example, a reaction product of a polyisocyanate and chitosan. Suitable treatment compositions and delivery particles are described in more detail below.

[0022] The contact step may be performed during a manual washing process, for example, in a washbasin when the fabric is handled by hand, or during an automatic washing process, for example, in an automatic washing machine. The contact step may be performed during the wash cycle of an automatic washing machine. In such cases, the treatment composition may be a laundry detergent or laundry additive. The contact step may preferably be performed during the rinse cycle of an automatic washing machine. In such cases, the treatment composition may be a fabric strengthener, preferably a liquid fabric strengthener. The contact step may also be performed during the drying step of the washing process, for example, in an automatic dryer. In such cases, the treatment composition may be in the form of a nonwoven dryer sheet or dryer bar. The contact step may be performed, for example, as a result of the treatment composition being applied directly to the fabric in a pre-treatment or "refreshing" step (for example, in the case of fabric used or worn since the last wash). In such cases, the treatment composition may be in the form of a liquid, stick, or spray, preferably a spray. Bringing the target fabric into contact with the laundry relatively late in the washing process, for example during the rinse cycle, improves the likelihood or efficiency of adhesion to the fabric, as the fabric is less likely to be washed down the drain.

[0023] The contact process may occur in the presence of water. The treatment composition can be diluted with water to form a treatment solution. The treatment composition can be diluted about 100 to 1500 times, preferably 300 to 1000 times.

[0024] A liquid containing the disclosed composition may have a pH of about 3 to about 11.5. When diluted, such a composition is typically used in solution at a concentration of about 500 ppm to about 15,000 ppm. If the washing solvent is water, the temperature of the water is typically in the range of about 5°C to about 90°C, and the water-to-fabric ratio may typically be about 1:1 to about 30:1.

[0025] Dilution may be performed in the drum of the automatic washing machine. The treatment composition can be placed in the distribution drawer of the automatic washing machine. The treatment composition may be dispensed from the distribution drawer into the drum during the treatment process.

[0026] This method includes the step of exposing a fabric to UV light. More specifically, the method can be described as exposing at least a portion of delivery particles located on the fabric, preferably on the surface of the fabric, to UV light. In the method of this disclosure, it is understood that the fabric and / or particles do not need to be exposed to UV light alone. Other parts of the spectrum, e.g., visible light and / or infrared light, are also likely to be present. In other words, the exposure step is not limited to UV light, but rather is intended to be in the presence of UV light (among other wavelengths).

[0027] Ultraviolet (UV) light is a form of electromagnetic radiation typically characterized by wavelengths shorter than those of visible light. For example, the wavelength of UV light may be about 10 nm to about 400 nm. UV light can be further subdivided by wavelength. For example, UV-A radiation has wavelengths of about 315 nm to about 400 nm, while UV-B radiation has wavelengths of about 280 nm to about 315 nm. The sun is a common UV light source, but lighting devices such as UV lamps can also generate UV light. The UV light of this disclosure may preferably be about 200 nm to about 400 nm, preferably about 280 nm to about 400 nm.

[0028] Preferably, the UV light source is sunlight. Preferably, the step of exposing the fabric to UV light is performed outdoors.

[0029] The UV light source may be a lighting device rather than sunlight. The use of such a device may be preferable when the primary use of the fabric is likely to be indoors. Such a lighting device may be located inside an automatic washing machine or automatic dryer. Such a lighting device may be used during or after a drying process, including during or after a passive drying process.

[0030] At least a portion of the exposure process may occur during a passive drying process, preferably outdoors, for example, during a line drying process. Such exposure is thought to result in the release of beneficial agents, preferably fragrances, which can provide a pleasant experience to users who collect, fold, and / or use the fabric.

[0031] At least a portion of the exposure process may be carried out, preferably outdoors, while the fabric is being worn by a person or used in any other way. Preferably, the fabric is clothing, such as a shirt. Such exposure is thought to result in the release of beneficial agents, preferably fragrances, which can provide a pleasant experience to the wearer of the fabric and / or those near the wearer. In particular, the benefits of the method of the present invention may be especially appreciated by those who work, commute, or exercise outdoors.

[0032] As suggested above, the method may further include a step of drying a fabric having one or more delivery particles on its surface. The drying step may include a passive drying process, such as on a clothesline or drying rack. The drying step may also include an automatic drying process, such as an automatic dryer.

[0033] Processing composition This disclosure relates to treatment compositions. These treatment compositions may be useful in methods for treating fabrics as described herein. These treatment compositions may also be useful in consumer products as described herein.

[0034] The treatment composition is preferably a fabric care composition, more preferably a fabric conditioning composition, and even more preferably a liquid fabric conditioning composition.

[0035] The treatment composition comprises a group of delivery particles. The treatment composition may further comprise one or more auxiliary components. These materials are described in more detail below.

[0036] The processed composition may be in the form of a liquid composition, a granular composition, a hydrocolloid, a single-compartment pouch, a multi-compartment pouch, a soluble sheet, pastils or beads, a fibrous article, a tablet, a stick, a bar, a flake, a foam / mousse, a nonwoven sheet, or a mixture thereof.

[0037] The treatment composition may be in liquid form. The liquid composition may contain about 50% to about 97% by weight, preferably about 60% to about 96% by weight, more preferably about 70% to about 95% by weight, and even more preferably about 80% to about 95% by weight of water, of the fabric treatment composition. The liquid composition may be a liquid fabric conditioner. The liquid may be packaged in a refillable bottle. The liquid may be packaged in an aerosol can or other spray bottle. Suitable containers will be described in more detail below.

[0038] The treatment composition may be in solid form. The composition may be in the form of beads or pastilles, which may be molded into tablets from a liquid melt. The composition may be an extruded product. The treatment composition may be in the form of powder or granules.

[0039] The treatment composition may be in the form of a spray, for example, dispensed from a bottle via an aerosol container having a trigger sprayer and / or valve.

[0040] The composition is processed for 20 seconds. -1 Furthermore, at 21°C, it may have viscosities of 1 to 1500 centipoise (1 to 1500 mPa·s), 100 to 1000 centipoise (100 to 1000 mPa·s), or 200 to 500 centipoise (200 to 500 mPa·s).

[0041] The treatment compositions of the present disclosure may be characterized by having a pH of about 2 to about 12, or about 2 to about 8.5, or about 2 to about 7, or about 2 to about 5. The treatment compositions of the present disclosure may preferably be in aqueous liquid form and have a pH of about 2 to about 4, preferably about 2 to about 3.7, and more preferably about 2 to about 3.5. Such pH levels are thought to promote the stability of quaternary ammonium ester compounds, if present. The pH of the composition is measured by dissolving / dispersing the composition in deionized water to form a 10% solution at about 20°C.

[0042] The additional components and / or properties of the composition will be discussed in more detail below.

[0043] delivery particles The processing compositions of the present disclosure comprise a group of delivery particles. Each delivery particle comprises a core and a shell surrounding the core. The core may comprise a beneficial agent and, optionally, a partitioning modifier. The core may be liquid or solid at room temperature, preferably liquid.

[0044] As described above, the delivery particles of this disclosure can be used in a treatment composition to effectively encapsulate and deliver beneficial agents such as fragrances with relatively low leakage into the product. However, when attached to a target surface such as a washed fabric, the delivery particles are thought to be able to provide a desirable stepwise release profile when exposed to UV light, such as that provided by sunlight.

[0045] The processed composition may contain delivery particles in an amount of about 0.05% to about 20% by weight of the composition, or about 0.05% to about 10% by weight, or about 0.1% to about 5% by weight, or about 0.2% to about 2% by weight. The composition may contain a total amount of delivery particles sufficient to provide the composition with an amount of encapsulated beneficial agent, preferably a fragrance ingredient, in an amount of about 0.05% to about 10% by weight, or about 0.1% to about 5% by weight, or about 0.1% to about 2% by weight of the composition. Where used herein, the amount or weight percentage of delivery particles refers to the total of the wall material and the core material.

[0046] The group of delivery particles according to this disclosure may be characterized by a volume-weighted median particle size of about 1 to about 100 microns, preferably about 10 to about 100 microns, preferably about 15 to about 50 microns, more preferably about 20 to about 40 microns, and even more preferably about 20 to about 30 microns. Different particle sizes can be obtained by controlling the droplet size during emulsification.

[0047] The delivered particles may feature a core-to-shell ratio of up to 99:1, or even 99.5:1, based on weight.

[0048] The delivery particles may be cationic, preferably cationic at pH 4.5. The delivery particles may be characterized by a zeta potential of at least 15 millivolts (mV) at pH 4.5. The delivery particles may be shaped to have a zeta potential of at least 15 millivolts (mV) at pH 4.5, or further at at least 40 mV at pH 4.5, or further at at least 60 mV at pH 4.5. Polyurea capsules prepared using chitosan typically exhibit a positive zeta potential. Such capsules have improved adhesion efficiency to fabrics. At higher pH levels, the particles may be nonionic or anionic.

[0049] The shell of the delivery particle comprises a polymer material which may be a reaction product of polyisocyanate and chitosan. The chitosan may preferably be hydrolyzed chitosan. The shell may comprise a polyurea resin, which comprises a reaction product of polyisocyanate and chitosan, preferably hydrolyzed chitosan. The delivery particles of this disclosure may be considered polyurea delivery particles and may comprise a polyurea-chitosan shell. (As used herein, “shell” and “wall” are used interchangeably with respect to delivery particles unless otherwise indicated. The shell may be derived from isocyanate and chitosan, preferably hydrolyzed chitosan.) While not wishing to be bound by theory, the subject of the present invention is considered to enable a controlled surface charge of chitosan-urea delivery particles by chemical bonding to the surface of the delivery particle, particularly the outer surface, via charged domains or charged pendant groups of the resulting polymer.

[0050] The group of delivery particles may be produced according to a process comprising the following steps: forming an aqueous phase by hydrolyzing chitosan in an aqueous acidic medium at a pH of 6.5 or less and a temperature of at least 60°C for at least 1 hour; forming an oil phase, which optionally includes dissolving at least one beneficial agent and at least one polyisocyanate together with an additive oil; forming an emulsion by mixing the aqueous phase and the oil phase in an excess of aqueous phase under high shear stirring, thereby forming droplets of the oil phase and beneficial agent dispersed in the aqueous phase, and optionally adjusting the pH of the emulsion to a range of pH 2 to pH 6; and curing the emulsion by heating to at least 40°C for a time sufficient to form a shell at the interface between the droplets and the aqueous phase, wherein the shell contains the reaction product of the polyisocyanate and hydrolyzed chitosan, and the shell surrounds a core containing droplets of the oil phase and beneficial agent. Curing may occur at temperatures up to about 100°C, more preferably up to about 90°C. The hydrolysis of chitosan can occur at temperatures up to about 100°C, more preferably up to about 90°C. Such temperatures increase the likelihood that water will remain (e.g., not evaporate) for the desired reaction to take place.

[0051] The shell of the delivery particles may contain a polyurea resin, which contains a reaction product of polyisocyanate and chitosan, and the chitosan is first hydrolyzed in an acidic medium at a pH of 6.5 or less, preferably even less than pH 6.5, more preferably 3 to 6, and at a temperature of at least 60°C for at least 1 hour, and at least 21% by weight of the shell consists of a portion derived from hydrolyzed chitosan, and the shell decomposes by at least 40% in 14 days (or less) when tested according to the test method OECD 301B. The formed shell may be a chitosan-polyurea shell having a chitosan content of at least 21% by weight based on the weight of the shell.

[0052] The delivery particles can be prepared by hydrolyzing chitosan in a first step to produce an aqueous solution of hydrolyzed chitosan. The hydrolyzed chitosan can be used as a crosslinking agent for forming the shell of the core-shell delivery particles at an acidic to neutral pH. A pH of at least 2, preferably at least 3, and more preferably at least 4 is useful for the aqueous phase to promote crosslinking between the hydrolyzed chitosan and the isocyanate monomer. The chitosan in the hydrolysis step can preferably be depolymerized to a weight-average molecular weight of about 95 kilodaltons (kDa) or less. The chitosan of the shell may be characterized by a degree of deacetylation of at least 50%, preferably at least 75%, more preferably at least 85%, and even more preferably at least 92%.

[0053] It may be preferable to use hydrolyzed chitosan to produce the particles of this disclosure. While we do not wish to be bound by theory, compared to unhydrolyzed chitosan, hydrolyzed chitosan is thought to have improved water solubility while also possessing the ability to function as an emulsifier, making it relatively easier to form delivery particles via interfacial polymerization involving the aqueous phase. Particles produced from hydrolyzed chitosan may also exhibit a favorable biodegradability profile. For example, degradability tends to increase as the pH of hydrolysis decreases to less than pH 6.5, preferably less than 6. In addition or alternatively, hydrolyzed chitosan may be a more effective crosslinking agent when reacting with isocyanates / polyureas, possibly due to its smaller size / lower molecular weight.

[0054] The chitosan used in the delivery particle formation process can be initially hydrolyzed under acidic conditions (pH 6.5 or lower). Optionally, the chitosan can be hydrolyzed at a pH of 2–6.5, or even 4–6. This yields deacetylated and depolymerized chitosan that is water-soluble but retains its ability to function as an emulsifier or replace the need for an emulsifier, making additional emulsifiers optional. Small differences in reaction conditions can unexpectedly result in inclusions with significantly different properties. This effect is considered more pronounced in the chitosan hydrolysis step when the pH is adjusted to approximately pH 4, or pH 2–6, or pH 3–5, preferably pH 3.5–5.

[0055] Chitosan can be hydrolyzed in a pH range of 2 to 6.5 and at a temperature of at least 45°C. In the hydrolysis step, the chitosan is deacetylated to at least 75%, then at least 80%, then at least 85%, or then at least 92%. In the hydrolysis step, the chitosan is depolymerized to a weight-average molecular weight of 95 kDa or less.

[0056] In this disclosure, hydrolyzed chitosan is taught to be used as both a crosslinking agent and an emulsifier for preparing polyurea delivery particles. Hydrolysis has the advantage of deacetylating and depolymerizing chitosan, thereby solubilizing materials that would otherwise be difficult to handle. Chitosan can be added to water in a jacketed reactor at a pH of 2 or further 3 to 6.5 and adjusted with an acid such as concentrated HCl. The chitosan in this mixture can be hydrolyzed by heating to a high temperature such as 85°C for 60 minutes, and then holding at this temperature for 1 to 1440 minutes or more. The aqueous phase is then cooled to 25°C. Optionally, deacetylation may be further promoted or enhanced by an enzyme that depolymerizes or deacetylates the chitosan. The oil phase is prepared by dissolving an isocyanate, such as a trimer of xylylene diisocyanate (XDI) or a polymer of methylene diphenyl isocyanate (MDI), in oil at 25°C. A diluent, such as isopropyl myristate, may be used to adjust the hydrophilicity of the oil phase. The oil phase is then added to the aqueous phase and ground at high speed to obtain the target size. The emulsion is then cured in one or more heating steps, such as heating to 40°C for 30 minutes and holding at 40°C for 60 minutes. The time and temperature are approximate. The temperature and time are selected so as to be sufficient to form and cure a shell at the interface between the oil phase droplets and the aqueous continuous phase. For example, the emulsion is heated to 85°C for 60 minutes and then held at 85°C for 360 minutes to cure the particles. The slurry is then cooled to room temperature.

[0057] The chitosan content of the shell as a weight percentage may be about 21% to about 95% of the shell. The ratio of isocyanate monomer, oligomer, or prepolymer to hydrolyzed chitosan may be up to 1:10 by weight. The ratio of hydrolyzed chitosan in the aqueous phase to isocyanate in the oil phase may be 21:79 to 90:10, or further 1:2 to 10:1, or further 1:1 to 7:1, based on weight. The shell may contain chitosan at a concentration of 21% by weight or more of the total shell, preferably about 21% to about 90% by weight, or further 21% to 85% by weight, or further 21% to 75% by weight, or 21% to 55% by weight.

[0058] Polyisocyanates useful in the present invention should be understood for the purposes of this specification as isocyanate monomers, isocyanate oligomers, isocyanate prepolymers, or dimers or trimers of aliphatic or aromatic isocyanates. All such monomers, prepolymers, oligomers, or dimers or trimers of aliphatic or aromatic isocyanates are intended to be encompassed by the term “polyisocyanate” as used herein.

[0059] Polyisocyanates may be aliphatic or aromatic monomers, oligomers, or prepolymers that usefully contain two or more isocyanate functional groups. Polyisocyanates can preferably be selected from the group comprising toluene diisocyanate, trimethylolpropane adducts of toluene diisocyanate and trimethylolpropane adducts of xylylene diisocyanate, methylenediphenyl isocyanate, toluene diisocyanate, tetramethylxylidene diisocyanate, naphthalene-1,5-diisocyanate, and phenylenediisocyanate.

[0060] Polyisocyanates can be selected from, for example, aromatic toluene diisocyanates and their derivatives used for wall formation for inclusion bodies, or aliphatic monomers, oligomers, or prepolymers, such as hexamethylene diisocyanates and their dimers or trimers, or 3,3,5-trimethyl-5-isocyanatomethyl-1-isocyanatocyclohexanetetramethylene diisocyanate. Polyisocyanates can also be selected from 1,3-diisocyanato-2-methylbenzene, hydrogenated MDI, bis(4-isocyanatocyclohexyl)methane, dicyclohexylmethane-4,4'-diisocyanate, and their oligomers and prepolymers. This list is illustrative and is not intended to limit the polyisocyanates useful in this disclosure.

[0061] The polyisocyanates useful in the present invention include isocyanate monomers, oligomers, or prepolymers having at least two isocyanate groups, or dimers or trimers thereof. Optimal crosslinking can be achieved using polyisocyanates having at least three functional groups.

[0062] For the purposes of this disclosure, polyisocyanates are understood to encompass any polyisocyanate having at least two isocyanate groups and containing an aliphatic or aromatic moiety in the monomer, oligomer, or prepolymer. If aromatic, the aromatic moiety may include a phenyl, toluyl, xylyl, naphthyl, or diphenyl moiety, more preferably a toluyl or xylyl moiety. For the purposes of this specification, aromatic polyisocyanates may include diisocyanate derivatives such as biuret and polyisocyanurate. Polyisocyanates, in the case of aromatic polyisocyanates, may be, but are not limited to, methylenediphenyl isocyanate, toluene diisocyanate, tetramethylxylidene diisocyanate, polyisocyanurate of toluene diisocyanate (commercially available from Bayer under the trade name Desmodur® RC), trimethylolpropane adduct of toluene diisocyanate (commercially available from Bayer under the trade name Desmodur® L75), or trimethylolpropane adduct of xylylene diisocyanate (commercially available from Mitsui Chemicals under the trade name Takenate® D-110N), naphthalene-1,5-diisocyanate, and phenylene diisocyanate.

[0063] Aromatic polyisocyanates are preferred. However, aliphatic polyisocyanates and blends thereof may be useful. Aliphatic polyisocyanates are understood as polyisocyanates that do not contain any aromatic moiety. Examples of aliphatic polyisocyanates include trimers of hexamethylene diisocyanate, trimers of isophorone diisocyanate, trimethylolpropane adducts of hexamethylene diisocyanate (available from Mitsui Chemicals), or biuret of hexamethylene diisocyanate (commercially available from Bayer under the trade name Desmodur® N 100).

[0064] The particle shell may also be reinforced with additional cocrosslinking agents such as polyfunctional amines and / or polyamines, including diethylene triamine (DETA), polyethyleneimine, polyvinylamine, or mixtures thereof.

[0065] The shell may be present at a concentration of about 1 to 15% by weight of the delivery particles. The shell may be present at a concentration of at least 1% by weight, preferably at least 3% by weight, and more preferably at least 5% by weight of the delivery particles. The shell may be present at a concentration of up to about 15% by weight of the delivery particles.

[0066] The shell may decompose by at least 50% after 20 days (or less) when tested according to test method OECD 301B. The shell may decompose by at least 60% of its mass after 60 days (or less) when tested according to test method OECD 301B. The shell may preferably decompose by at least 60% of its mass after 60 days (or less) when tested according to test method OECD 301B. The shell may decompose by 30-100%, preferably 40-100%, 50-100%, 60-100%, or 60-95% after 60 days, preferably 50 days, more preferably 40 days, more preferably 28 days, and more preferably 14 days.

[0067] The delivery particles of this disclosure include a core. The core includes a beneficial agent. The core optionally also includes a partitioning denaturant.

[0068] The particle core is surrounded by a shell. When the shell ruptures, the beneficial agent inside the core is released. Suitable beneficial agents to be placed inside the core include those that provide benefits to surfaces such as fabrics or hair.

[0069] The core may contain beneficial agents in an amount of about 5% to about 100% by weight of the core, preferably including fragrance. The core may contain beneficial agents in an amount of about 45% to about 95% by weight, preferably about 50% to about 80% by weight, more preferably about 50% to about 70% by weight of the core, preferably including fragrance.

[0070] The beneficial agent may include an aldehyde-containing beneficial agent, a ketone-containing beneficial agent, or a combination thereof. Such beneficial agents, such as aldehyde or ketone-containing fragrance raw materials, are known to provide desirable benefits, such as the benefit of freshness. The beneficial agent may contain at least about 20% by weight, preferably at least about 25% by weight, more preferably at least about 40% by weight, and even more preferably at least about 50% by weight of an aldehyde-containing beneficial agent, a ketone-containing beneficial agent, or a combination thereof, of the beneficial agent.

[0071] The beneficial agent may be a hydrophobic beneficial agent. Such agents are compatible with the oil phase that is common when preparing the delivery particles of this disclosure.

[0072] Beneficial agents include fragrances, silicone oils, waxes, hydrocarbons, higher fatty acids, essential oils, lubricants, lipids, skin coolants, vitamins, sunscreens, antioxidants, glycerin, catalysts, bleaching particles, silicon dioxide particles, odor reducers, odor control materials, chelating agents, antistatic agents, softeners, insect and moth repellents, colorants, antioxidants, chelating agents, thickeners, drape and foam modifiers, smoothing agents, wrinkle inhibitors, sanitizing agents, disinfectants, antibacterial agents, mold inhibitors, mildew inhibitors, antiviral agents, desiccants, stain-resistant agents, dirt-releasing agents, and fabrics. The following may be selected from the group consisting of refreshing agents and fresh-wash-resistance-maintaining agents, chlorine bleach odor inhibitors, dye fixatives, color transfer inhibitors, color retention agents, fluorescent whitening agents, color restorers / regenerators, anti-fading agents, whiteness enhancers, anti-abrasion agents, abrasion-resistant agents, fabric integrating agents, abrasion inhibitors, anti-fuzzing agents, anti-foaming agents, anti-foaming agents, UV protectants, sun-fading inhibitors, anti-allergic agents, enzymes, waterproofing agents, fabric comfort agents, shrinkage-resistant agents, stretch-resistant agents, stretch-recovering agents, skin care agents, glycerin, synthetic or natural active substances, antimicrobial active substances, antiperspirant active substances, cationic polymers, dyes, and mixtures thereof.

[0073] The encapsulated beneficial agent may preferably contain a fragrance, which may contain one or more fragrance ingredients. The fragrance is particularly suitable for encapsulation in the delivery particles described herein because the fragrance-containing particles can provide the benefit of freshness across multiple touchpoints.

[0074] As used herein, the term “Fragrance Raw Materials” (or “PRM”) refers to compounds having a molecular weight of at least about 100 g / mol that are useful for imparting odors, fragrances, essences, or scents, either alone or in combination with other fragrance raw materials. Typical PRMs include alcohols, ketones, aldehydes, esters, ethers, nightlights, and alkenes such as terpenes. General lists of PRMs can be found in various references, such as “Perfume and Flavor Chemicals” Volumes I and II; Steffen Arctander Allured Pub.Co. (1994) and “Perfumes: Art, Science and Technology,” Miller, P.M. and Lamparsky, D., Blackie Academic and Professional (1994).

[0075] PRM may be characterized by their boiling point (BP), measured at atmospheric pressure (760 mm Hg), and an octanol / water partition coefficient (P), which can be described with respect to logP, determined according to the following test method. Based on these characteristics, as described in more detail below, PRM may be classified as a Quadrant I, Quadrant II, Quadrant III, or Quadrant IV fragrance.

[0076] The fragrance may contain fragrance ingredients having a logP of approximately 2.5 to 4. It is understood that other fragrance ingredients may also be present in the fragrance.

[0077] The fragrance raw materials may include fragrance raw materials selected from the group consisting of fragrance raw materials having a boiling point (BP) lower than about 250°C and a logP lower than about 3, fragrance raw materials having a BP higher than about 250°C and a logP higher than about 3, fragrance raw materials having a BP higher than about 250°C and a logP lower than about 3, fragrance raw materials having a BP lower than about 250°C and a logP higher than about 3, and mixtures thereof. Fragrance raw materials having a boiling point (BP) lower than about 250°C and a logP lower than about 3 are known as Quadrant I fragrance raw materials. Quadrant I fragrance raw materials are preferably limited to less than 30% of the fragrance composition. Fragrance raw materials having a BP higher than approximately 250°C and a logP higher than approximately 3 are known as Quadrant IV fragrance raw materials, fragrance raw materials having a BP higher than approximately 250°C and a logP lower than approximately 3 are known as Quadrant II fragrance raw materials, and fragrance raw materials having a BP lower than approximately 250°C and a logP higher than approximately 3 are known as Quadrant III fragrance raw materials. Suitable Quadrant I, II, III, and IV fragrance raw materials are disclosed in U.S. Patent No. 6,869,923(B1).

[0078] The consumer product composition according to any one of the preceding claims, wherein the beneficial agent comprises an aroma, preferably the aroma comprising at least about 20% by weight, preferably at least about 25% by weight, more preferably at least about 40% by weight, and even more preferably at least about 50% by weight of an aldehyde-containing fragrance raw material, a ketone-containing fragrance raw material, or a combination thereof.

[0079] Preferred aldehyde-containing fragrance ingredients include methyl nonylacetaldehyde, benzaldehyde, floralozone, isocyclocitral, tripral / ligustral, precyclemone B, lilial, decylaldehyde, undecylenic acid aldehyde, cyclamen homoaldehyde, cyclamen aldehyde, dupical, onsidal, adoxal, melonal, calypsone, anisaldehyde, heliotropin, cuminaldehyde, scentenal, 3,6-dimethylcyclohexa-3-ene-1-carbaldehyde, satinaldehyde, canthoxal, vanillin, and It may contain tilvanillin, cinnamaldehyde, cis-4-decenal, trans-4-decenal, cis-7-decenal, undecylenic acid aldehyde, trans-2-hexenal, trans-2-octenal, 2-undecenal, 2,4-dodecadeienal, cis-4-heptenal, florydral, butylcinnamaldehyde, limonelal, amylcinnamaldehyde, hexylcinnamaldehyde, citronellal, citral, cis-3-hexen-1-al, or mixtures thereof.

[0080] Preferred ketone-containing raw materials may include nerolion, 4-(4-methoxyphenyl)butan-2-one, 1-naphthalene-2-yleuthanone, nectaril, trimofix-O, fleuramone, delta-damascone, beta-damascone, alpha-damascone, methylionone, 2-hexylcyclopenta-2-en-1-one, galbascone, or mixtures thereof.

[0081] The core of the delivery particles of this disclosure may contain a partition modifier that can promote more robust shell formation. The partition modifier may be combined with the oleopropyl material of the core before the incorporation of the wall-forming monomer. The partition modifier may be present in the core at a concentration of about 5% to about 55% by weight, preferably about 10% to about 50% by weight, and more preferably about 25% to about 50% by weight of the core.

[0082] The partitioning modifier is vegetable oil, modified vegetable oil, C4-C 24 The distribution modifier may include materials selected from the group consisting of mono-, di-, and tri-esters of fatty acids, isopropyl myristate, dodecanophenone, lauryl laurate, methyl behenate, methyl laurate, methyl palmitate, methyl stearate, and mixtures thereof. The distribution modifier may preferably include isopropyl myristate, or further consist of isopropyl myristate. The modified vegetable oil may be esterified and / or brominated. The modified vegetable oil may preferably include castor oil and / or soybean oil. U.S. Patent Application Publication No. 20110268802, incorporated herein by reference, describes other distribution modifiers that may be useful in the delivery particles described herein.

[0083] If the beneficial agent itself is not sufficient to function as an oil phase or solvent, particularly for wall-forming materials, the oil phase may include a suitable carrier and / or solvent. In this sense, the oil is optional, as the beneficial agent itself can sometimes be an oil. These carriers or solvents are generally oils, preferably having a boiling point above about 80°C, low volatility, and being non-flammable. They preferably contain, but are not limited to, one or more esters having a chain length of up to 18 carbon atoms or even up to 42 carbon atoms, and / or triglycerides such as esters of C6-C12 fatty acids with glycerol. Exemplary carriers and solvents include ethyldiphenylmethane; isopropyldiphenylethane; butylbiphenylethane; benzylxylene; alkylbiphenyls such as propylbiphenyl and butylbiphenyl; dialkyl phthalates such as dibutyl phthalate, dioctyl phthalate, dinonyl phthalate, and ditridecyl phthalate; 2,2,4-trimethyl-1,3-pentanediol diisobutyrate; alkylbenzenes such as dodecylbenzene; alkyl or aralkyl benzoates such as benzyl benzoate; diaryl ethers; di(aralkyl) ethers and arylaralkyl ethers; ethers such as diphenyl ether, dibenzyl ether, and phenylbenzyl ether. Examples include, but are not limited to: liquid higher alkyl ketones (having at least 9 carbon atoms); alkyl or aralkyl benzoates such as benzyl benzoate; alkylated naphthalenes such as dipropylnaphthalene; partially hydrogenated terphenyls; high boiling point linear or branched hydrocarbons; alkaline hydrocarbons such as toluene; vegetable oils and other crop oils such as canola oil, soybean oil, corn oil, sunflower oil, cottonseed oil, lemon oil, olive oil and pine root oil; methyl esters of fatty acids derived from transesterification of vegetable oils and other crop oils, methyl esters of oleic acid, esters of vegetable oils, such as soybean methyl ester, linear paraffinic aliphatic hydrocarbons, and mixtures thereof.

[0084] Optionally, the aqueous phase may contain an emulsifier. Non-limiting examples of emulsifiers include alkyl sulfates such as water-soluble alkyl sulfates, alkyl ether sulfates, alkyl isothionates, alkyl carboxylates, alkyl sulfosuccinates, alkyl succinates, sodium dodecyl sulfate, alkyl sarcosinates, alkyl derivatives of protein hydrolysates, acyl aspartates, alkyl or alkyl ether or alkylaryl ether phosphate esters, sodium dodecyl sulfate, phospholipids or lecithin, or soaps, sodium, potassium or ammonium stearate, oleate or palmitate, alkylaryl sulfonic acids such as sodium dodecylbenzenesulfonate, sodium dialkyl sulfosuccinate, dioctyl sulfosuccinate, sodium dilauryl sulfosuccinate, sodium poly(styrene sulfonate) salts, isobutylene-maleic anhydride copolymer, gum arabic, sodium alginate, carboxymethylcellulose, cellulose sulfate and pectin, and poly(styrene Sulfonates), isobutylene-maleic anhydride copolymer, carrageenan, sodium alginate, pectin, tragacanth gum, almond gum and agar; semi-synthetic polymers, for example carboxymethylcellulose, sulfated cellulose, sulfated methylcellulose, carboxymethyl starch, phosphorylated starch, ligninsulfonic acid; and synthetic polymers, for example maleic anhydride copolymer (including its hydrolysates), polyacrylic acid, polymethacrylic acid, butyl acrylate copolymer or crotonic acid homopolymers and copolymers, vinylbenzenesulfonic acid or 2-acrylamido-2-methylpropanesulfonic acid homopolymers and copolymers, and partially amides or partially esters of such polymers and copolymers, carboxy-modified polyvinyl alcohol, sulfonic acid-modified polyvinyl alcohol, and phosphorylated polyvinyl alcohol, phosphorylated or sulfated tristyrylphenol ethoxylate, palmitoamidopropyltrimonium chloride (Varisoft PATC (trademark), Degussa Evonik (Essen,Available from Germany), distearyldimonium chloride, cetyltrimethylammonium chloride, quaternary ammonium compounds, aliphatic amines, aliphatic ammonium halides, alkyldimethylbenzylammonium halides, alkyldimethylethylammonium halides, polyethyleneimine, poly(2-dimethylamino)ethyl methacrylate) methyl chloride quaternary salts, poly(1-vinylpyrrolidone-co-2-dimethylaminoethyl methacrylate), poly(acrylamide-co-diallyldimethylammonium chloride), poly(allylamine), poly[bis(2-chloroethyl) ether-alt-1,3-bis[3-(dimethylamino)propyl]urea] quaternary, as well as poly(dimethylamine-co-epichlorohydrin-co-ethylenediamine), condensation products of aliphatic amines and alkylene oxides, quaternary ammonium compounds with long-chain aliphatic radicals (e.g., distearyldimonium Examples include nium chlorides, as well as aliphatic amines, alkyldimethylbenzylammonium halides, alkyldimethylethylammonium halides, polyalkylene glycol ethers, condensation products of alkylphenols, aliphatic alcohols, or fatty acids with alkylene oxides, ethoxylated alkylphenols, ethoxylated arylphenols, ethoxylated polyarylphenols, carboxylic acid esters solubilized with polyols, polyvinyl alcohol, polyvinyl acetate, or copolymers of polyvinyl alcohol and polyvinyl acetate, polyacrylamide, poly(N-isopropylacrylamide), poly(2-hydroxypropyl methacrylate), poly(-ethyl-2-oxazoline), poly(2-isopropenyl-2-oxazoline-co-methyl methacrylate), poly(methyl vinyl ether), and polyvinyl alcohol-co-ethylene, as well as cocoamidopropyl betaine. When used, the emulsifier is typically present in an amount of about 0.1–40% by weight, preferably 0.2–about 15% by weight, and more typically 0.5–10% by weight, based on the total weight of the formulation.

[0085] The delivery particles may also have various ratios of the distribution modifier and the beneficial agent to produce different groups of delivery particles that may have different bloom patterns. Such groups may also incorporate different fragrance oils to produce groups of delivery particles exhibiting different bloom patterns and different aroma experiences. U.S. Patent Application Publication No. 2011-0268802 discloses other non-limiting examples of delivery particles and distribution modifiers, which are incorporated herein by reference.

[0086] In the formation of chitosan delivery particles, the aqueous solution may contain residual hydrolyzed chitosan. This provides an option to dehydrate the delivery particles by decantation, filtration, centrifugation, or other separation techniques. Alternatively, the aqueous slurry of chitosan polyurea delivery particles can be spray-dried to form chitosan polyurea delivery particles further coated with a layer of residual hydrolyzed chitosan from the aqueous phase.

[0087] The slurry in which the delivery particles are formed can be further dispersed in additional water, or with a low concentration of residual overcoating hydrolyzed chitosan, to yield chitosan polyurea delivery particles that can be destroyed upon drying, providing an additional release mechanism useful in several applications such as aroma delivery, or with agricultural active substances for targeted delivery.

[0088] The group of delivery particles may comprise one or more distinct groups. The composition may have at least two distinct groups of delivery particles with varying exact compositions of the fragrance oils, as well as median particle size and / or weight ratio of the distribution modifier (PM:PO) to the fragrance oils. In some examples, the composition comprises three or more distinct groups with varying exact compositions of the fragrance oils and their fracture strengths. In some further examples, the group of delivery particles may vary with respect to the weight ratio of the distribution modifier to the fragrance oils. In some examples, the composition may include a first group of delivery particles having a first ratio in which the weight ratio of the distribution modifier to the first fragrance oil is 2:3 to 3:2, and a second group of delivery particles having a second ratio in which the weight ratio of the distribution modifier to the second fragrance oil is less than 2:3 but greater than 0.

[0089] Each distinct group of delivery particles may be prepared in a distinct slurry. For example, the first group of delivery particles may be contained in a first slurry, and the second group of delivery particles may be contained in a second slurry. The number of distinct slurries for combination is not limited and should be understood as a choice of the compounder such that 3, 10, or 15 distinct slurries may be combined. The first and second groups of delivery particles may vary in the exact composition of the fragrance oil, as well as in the median particle size and / or PM:PO weight ratio.

[0090] The compositions of the present disclosure can be prepared by combining the first and second slurries with at least one auxiliary component and optionally packaged in a container. The first and second groups of delivery particles may be prepared in separate slurries and then spray-dried to form fine particles. The separate slurries may be combined before spray-drying, or they may be spray-dried individually and then combined together if they are in the form of a fine powder. Once in powder form, the first and second groups of delivery particles may be combined with auxiliary components to form compositions useful as supply materials for the manufacture of consumer, industrial, medical, or other goods. At least one group of delivery particles may be spray-dried and combined with the slurry of the second group of delivery particles. At least one group of delivery particles may be dried and prepared by spray-drying, fluidized bed drying, tray drying, or other available such drying processes.

[0091] The composition can be prepared by combining the first and second slurries with at least one auxiliary component and optionally packaged in a container. The first and second groups of delivery particles may be prepared in separate slurries and then spray-dried to form fine particles. The separate slurries may be combined before spray-drying, or they may be spray-dried individually and then combined together if they are in the form of a fine powder. Once in powder form, the first and second groups of delivery particles may be combined with auxiliary components to form compositions useful as supply materials for the manufacture of consumer, industrial, medical, or other goods. At least one group of delivery particles may be spray-dried and combined with the slurry of the second group of delivery particles. At least one group of delivery particles may be dried and prepared by spray-drying, fluidized bed drying, tray drying, or other available such drying processes.

[0092] The slurry or dried fine particles may contain one or more auxiliary materials, such as carriers, flocculation inhibitors, adhesion aids, particle suspension polymers, and mixtures thereof, as well as processing aids selected from the group consisting of these. Non-limiting examples of flocculation inhibitors include salts that can have a charge shielding effect around the particles, such as magnesium chloride, calcium chloride, magnesium bromide, magnesium sulfate, and mixtures thereof. Non-limiting examples of particle suspension polymers include polymers such as xanthan gum, carrageenan gum, guar gum, shellac, alginate, and chitosan; cellulosic materials such as carboxymethylcellulose, hydroxypropylmethylcellulose, and cationic charged cellulose-based materials; polyacrylic acid; polyvinyl alcohol; hydrogenated castor oil; ethylene glycol distearate; and mixtures thereof.

[0093] The slurry may contain one or more processing aids, which may include water, a flocculation inhibitor such as a divalent salt, or a particulate suspension polymer such as xanthan gum, guar gum, and / or carboxymethylcellulose.

[0094] The slurry may contain one or more carriers selected from the group consisting of polar solvents including but not limited to water, ethylene glycol, propylene glycol, polyethylene glycol, and glycerol; and non-polar solvents including but not limited to mineral oil, fragrance raw materials, silicone oil, hydrocarbon paraffin oil, and mixtures thereof.

[0095] The slurry may contain an adhesion aid that may include a polymer selected from the group including: polysaccharides, in one embodiment, cationically modified starch and / or cationically modified guar; polysiloxane; polydiallyldimethylammonium halide; copolymer of polydiallyldimethylammonium chloride and polyvinylpyrrolidone; composition containing polyethylene glycol and polyvinylpyrrolidone; acrylamide; imidazole; imidazolinium halide; polyvinylamine; copolymer of polyvinylamine and N-vinylformamide; polyvinylformamide, polyvinyl alcohol; polyvinyl alcohol crosslinked with boric acid; polyacrylic acid; polyglycerol ether silicone crosspolymer; polyacrylic acid, polyacrylate, polyvinylamine and amine, in one embodiment, diethylenetriamine copolymers of ethylenediamine, bis(3-aminopropyl)piperazine, N,N-bis-(3-aminopropyl)methylamine, tris(2-aminoethyl)amine, and mixtures thereof with polyvinyl alcohol oligomers; polyethyleneimines, derivatized polyethyleneimines, and in one embodiment, ethoxylated polyethyleneimines; polymer compounds comprising at least two parts selected from a carboxylic acid part, an amine part, a hydroxyl part, and a nitrile part in the skeleton of polybutadiene, polyisoprene, polybutadiene / styrene, polybutadiene / acrylonitrile, carboxyl-terminated polybutadiene / acrylonitrile, or combinations thereof; pre-formed coacervates of anionic surfactants combined with cationic polymers; polyamines and mixtures thereof.

[0096] At least one group of delivery particles may be contained in an aggregate, which may then be combined with a separate group of delivery particles and at least one auxiliary material. The aggregate may consist of materials selected from the group consisting of silica, citric acid, sodium carbonate, sodium sulfate, sodium chloride, and binders, such as sodium silicate, modified cellulose, polyethylene glycol, polyacrylate, polyacrylic acid, zeolite, and mixtures thereof.

[0097] Suitable equipment for use in the processes disclosed herein may include continuous agitated reactors, homogenizers, turbine agitators, recirculation pumps, paddle mixers, plow shear mixers, ribbon blenders, vertical shaft granulators and drum mixers (both batch type and, where available, in continuous process configurations), spray dryers, and extruders. Such equipment is available from Lodige GmbH (Paderborn, Germany), Littleford Day, Inc. (Florence, Ky., USA), Forberg AS (Larvik, Norway), Glatt Ingenieurtechnik GmbH (Weimar, Germany), Niro (Soeborg, Denmark), Hosokawa Bepex Corp. (Minneapolis, Minn., USA), and Arde Barinco (New Jersey, USA).

[0098] The group of microcapsules may be part of an aqueous slurry containing (residual) hydrolyzed chitosan. The aqueous slurry can be spray-dried to form microcapsules overcoated with a layer of residual hydrolyzed chitosan adhering to the microcapsules from the slurry.

[0099] The process may include drying the delivery particles, which then break apart upon drying, thereby releasing the core. Dry-pop capsules that break apart upon drying are formed by controlling reaction conditions such as curing time and temperature to obtain capsules with thinner walls. Higher curing temperatures, along with longer curing times, can promote higher crosslinking density and enhanced brittleness. Thinner walls, such as 0.1 nanometers to about 300 nanometers, tend to be more brittle upon drying. Even in the dry-pop embodiment, the capsules of this disclosure can exhibit lower leakage and better retention of the core in the capsule slurry before drying.

[0100] Auxiliary materials The processing compositions disclosed herein may include one or more auxiliary materials in addition to the delivery particles. The auxiliary materials may provide benefits in the intended end use of the composition, or they may be processing aids and / or stabilizing aids.

[0101] Suitable auxiliary materials may include surfactants, conditioning agents, adhesion aids, rheological modifiers or structuring agents, bleaching agents, stabilizers, builders, chelating agents, color transfer inhibitors, dispersants, enzymes and enzyme stabilizers, catalytic metal complexes, polymer dispersants, clays and stain removers / anti-re-adhesion agents, whitening agents, foam inhibitors, silicones, colorants, aesthetic dyes, additional fragrances and fragrance delivery systems, structural elastochemicals, carriers, hydrotropes, processing aids, anti-aggregating agents, coating agents, formaldehyde scavengers, and / or pigments. Preferably, auxiliary materials include additional fabric conditioning agents, dyes, pH control agents, solvents, rheological modifiers, structuring agents, cationic polymers, surfactants, fragrances, additional fragrance delivery systems, chelating agents, antioxidants, preservatives, or mixtures thereof.

[0102] Depending on the intended form, formulation, and / or end use, the compositions of the present disclosure may contain one or more of the following auxiliary materials: bleach activators, surfactants, builders, chelating agents, color transfer inhibitors, dispersants, enzymes and enzyme stabilizers, catalytic metal complexes, polymer dispersants, clay and stain removers / anti-redeposition agents, whitening agents, foam inhibitors, dyes, additional fragrances and fragrance delivery systems, structural elastoides, fabric softeners, carriers, hydrotropes, processing aids, structuring agents, anti-aggregating agents, coating agents, formaldehyde scavengers, and / or pigments.

[0103] The exact properties of these additional components and the concentrations in which they are incorporated will depend on the physical form of the composition and the nature of the work in which it is used. However, if one or more auxiliary agents are present, such one or more auxiliary agents may be present as detailed below. The following is a non-limiting list of suitable additional auxiliary agents.

[0104] A. Surfactants The compositions of this disclosure may include surfactants. Surfactants may be useful, for example, to provide cleaning benefits. The compositions may include surfactant systems that may contain one or more surfactants.

[0105] The compositions of this disclosure may contain a surfactant system in an amount of about 0.1% to about 70% by weight, or about 2% to about 60% by weight, or about 5% to about 50% by weight of the composition. Liquid compositions may contain a surfactant system in an amount of about 5% to about 40% by weight of the composition. Concentrated formulations, such as dense liquids, gels, and / or compositions suitable for unit dose forms, may contain a surfactant system in an amount of about 25% to about 70% by weight, or about 30% to about 50% by weight of the composition.

[0106] The surfactant system may include anionic surfactants, nonionic surfactants, zwitterionic surfactants, cationic surfactants, amphoteric surfactants, or combinations thereof. The surfactant system may also include nonionic surfactants such as linear alkylbenzene sulfonates, alkyl ethoxylated sulfates, alkyl sulfates, ethoxylated alcohols, amine oxides, or mixtures thereof. The surfactant may be derived at least in part from natural resources such as naturally sourced raw material alcohols.

[0107] Suitable anionic surfactants may include any conventional anionic surfactant, such as sulfate cleaning surfactants for alkoxylated and / or non-alkoxylated alkyl sulfate materials, and / or sulfonic acid-based cleaning surfactants, such as alkylbenzene sulfonates. The anionic surfactant may be linear, branched, or a combination thereof. Preferred surfactants include linear alkylbenzene sulfonate (LAS), alkyl ethoxylated sulfate (AES), alkyl sulfate (AS), or mixtures thereof. Other suitable anionic surfactants include modified alkyl benzene sulfonates (MLAS), methyl ester sulfonates (MES), sodium lauryl sulfate (SLS), sodium lauryl ether sulfate (SLES), and / or alkyl ethoxylated carboxylates (AEC). Anionic surfactants may exist in acid form, salt form, or mixtures thereof. Anionic surfactants may be neutralized partially or whole with, for example, alkali metals (e.g., sodium) or amines (e.g., monoethanolamine). It may be desirable to limit the amount of anionic surfactant to avoid undesirable interactions of substances due to the presence of cationic ester quat materials. For example, a composition may contain less than 5% by weight of the anionic surfactant, preferably less than 3% by weight, more preferably less than 1% by weight, and even more preferably less than 0.1% of the composition.

[0108] The surfactant system may contain a nonionic surfactant. Suitable nonionic surfactants include alkoxylated aliphatic alcohols such as ethoxylated aliphatic alcohols. Other suitable nonionic surfactants include alkoxylated alkylphenols, alkylphenol condensates, medium-chain branched alcohols, medium-chain branched alkyl alkoxylates, alkyl polysaccharides (e.g., alkyl polyglycosides), polyhydroxy fatty acid amides, ether-capped poly(oxyalkylated) alcohol surfactants, and mixtures thereof. The alkoxylate units may be ethyleneoxy units, propyleneoxy units, or mixtures thereof. The nonionic surfactant may be linear, branched (e.g., medium-chain branched), or a combination thereof. Certain nonionic surfactants may include alcohols having an average of about 12 to about 16 carbons and an average of about 3 to about 9 ethoxy groups, such as a C12-C14 EO7 nonionic surfactant.

[0109] Suitable zwitterionic surfactants include betaines such as alkyldimethylbetaine and coco dimethylamidopropyl betaine, C8-C 18 (e.g., C 12 -C 18 ) amine oxides (e.g., C 12 - 14 dimethylamine oxide), and / or N-alkyl-N,N-dimethylamino-1-propanesulfonate (where the alkyl group may be C8-C 18 or C 10 -C 14 ) and any conventional zwitterionic surfactants such as sulfobetaines and hydroxybetaines. The zwitterionic surfactant may include an amine oxide.

[0110] Depending on the formulation and / or intended end use, the composition may not substantially contain certain surfactants. For example, liquid fabric-enhancing compositions such as fabric softeners may not substantially contain anionic surfactants because such surfactants can negatively interact with cationic components.

[0111] B. Conditioning Active Substances The compositions of this disclosure may contain conditioning active substances. Compositions containing conditioning active substances may provide benefits relating to flexibility, wrinkle resistance, antistatic properties, conditioning, stretch resistance, color, and / or appearance.

[0112] The conditioning active substance may be present in a concentration of about 1% to about 99% by weight of the composition. The composition may contain a conditioning active substance ranging from about 1% to about 2% to about 3% to about 99% by weight, or up to about 75% to about 50% to about 40% to about 35% to about 30% to about 25% to about 20% to about 15% to about 10% by weight of the composition. The composition may contain a conditioning active substance ranging from about 5% to about 30% by weight of the composition.

[0113] Suitable conditioning active substances for the compositions of this disclosure include quaternary ammonium ester compounds, silicones, non-esterified quaternary ammonium compounds, amines, fatty acid esters, sucrose esters, silicones, dispersible polyolefins, polysaccharides, fatty acids, softening or conditioning oils, polymer latex, or combinations thereof. Preferably, the treatment composition is a fabric care composition in which one or more auxiliary components are quaternary ammonium ester materials. Such materials are particularly useful in fabric strengthening / conditioning / softening compositions.

[0114] This composition may contain a quaternary ammonium ester compound, a silicone, or a combination of several sets thereof, preferably one set. The total amount of the quaternary ammonium ester compound and the silicone may be about 5% to about 70% by weight of the composition, or about 6% to about 50% by weight, or about 7% to about 40% by weight, or about 10% to about 30% by weight, or about 15% to about 25% by weight. The composition may contain the quaternary ammonium ester compound and the silicone in a weight ratio of about 1:10 to about 10:1, or about 1:5 to about 5:1, or about 1:3 to about 1:3, or about 1:2 to about 2:1, or about 1:1.5 to about 1.5:1, or about 1:1.

[0115] The composition may contain a mixture of different types of conditioning active substances. The composition of this disclosure may contain a specific conditioning active substance, but may not substantially contain other conditioning active substances. For example, the composition may not contain a quaternary ammonium ester compound, a silicone, or both. The composition may contain a quaternary ammonium ester compound, but may not substantially contain a silicone. The composition may contain a silicone, but may not substantially contain a quaternary ammonium ester compound.

[0116] C. Adhesion aids The compositions of the present disclosure may include adhesion enhancers. As described above, due to the synergistic effects flowing from the ester quaternary material and the delivery particles of the present disclosure, relatively little (or no) adhesion enhancers may be required to provide equivalent or even improved performance. Alternatively, adhesion enhancers may be used in the compositions of the present disclosure to further enhance performance.

[0117] Adhesion aids may promote the adhesion of delivery particles, conditioning actives, fragrances, or combinations thereof, improving the performance effects of the composition and / or enabling more efficient formulation of such beneficial agents. The composition may contain 0.0001% to 3% by weight, preferably 0.0005% to 2% by weight, more preferably 0.001% to 1% by weight, or about 0.01% to about 0.5% by weight, or about 0.05% to about 0.3% by weight of the adhesion aid. The adhesion aid may be a cationic or amphoteric polymer, preferably a cationic polymer.

[0118] Cationic polymers in general and methods for producing them are well known in the literature. Suitable cationic polymers include quaternary ammonium polymers known as "polyquaternium" polymers, named in the International Nomenclature for Cosmetic Ingredients, such as polyquaternium-6 (poly(diallyldimethylammonium chloride)), polyquaternium-7 (a copolymer of acrylamide and diallyldimethylammonium chloride), polyquaternium-10 (quaternized hydroxyethylcellulose), and polyquaternium-22 (a copolymer of acrylic acid and diallyldimethylammonium chloride).

[0119] The adhesion aid may be selected from the group consisting of polyvinylformamide, partially hydroxylated polyvinylformamide, polyvinylamine, polyethyleneimine, ethoxylated polyethyleneimine, polyvinyl alcohol, polyacrylate, and combinations thereof. The cationic polymer may include cationic acrylate.

[0120] Adhesion aids can be added to the fabric treatment composition simultaneously with the delivery particles (e.g., simultaneously with the encapsulated beneficial agent) or directly / independently. The weight-average molecular weight of the polymer may be 500 to 5,000,000 daltons, or 1,000 to 2,000,000 daltons, or 2,500 to 1,500,000 daltons, when measured by size exclusion chromatography against a polyethylene oxide standard using refractive index (RI) detection. The weight-average molecular weight of the cationic polymer may be 5,000 to 37,500 daltons.

[0121] D. Rheological modifier / structuring agent The compositions of this disclosure may include rheological modifiers and / or structuring agents. Rheological modifiers may be used to “thicken” or “thicken” the liquid composition to a desired viscosity. Structuring agents may be used to promote phase stability and / or to suspend particles in the liquid composition, such as delivery particles described herein, or to inhibit their aggregation.

[0122] Suitable rheological modifiers and / or structuring agents include nonpolymeric crystalline hydroxyl-functional structuring agents (including those based on hydrogenated castor oil), polymer structuring agents, cellulose fibers (e.g., microfibrillated cellulose, which may be derived from bacterial, fungal, or plant origins, including wood), diamide gelling agents, or combinations thereof.

[0123] Polymer structuring agents may be of natural or synthetic origin. Natural polymer structuring agents may include hydroxyethylcellulose, hydrophobic modified hydroxyethylcellulose, carboxymethylcellulose, polysaccharide derivatives, and mixtures thereof. Polysaccharide derivatives may include pectin, alginates, arabinogalactan (gum arabic), carrageenan, gellan gum, xanthan gum, guar gum, and mixtures thereof. Synthetic polymer structuring agents may include polycarboxylate, polyacrylate, hydrophobic modified ethoxylated urethane, hydrophobic modified nonionic polyol, and mixtures thereof. Polycarboxylate polymers may include polyacrylate, polymethacrylate, or mixtures thereof. Polyacrylate is composed of unsaturated monocarbonate or dicarbonate and C1-C1 (meth)acrylic acid. 30 Copolymers with alkyl esters may also be included. Such copolymers are available from Noveon Inc. under the trade name Carbopol Aqua 30. Another suitable structuring agent is available from BASF under the trade name Rheovis CDE.

[0124] E. Other supplements The processed compositions disclosed herein may include other auxiliary agents suitable for inclusion in a product and / or for end use. For example, the processed compositions may include pure fragrances, fragrance delivery technologies (such as encapsulations having auxiliary fragrances and / or non-polyisocyanate / chitosan wall materials), cationic surfactants, cationic polymers, solvents, foam inhibitors, or combinations thereof.

[0125] The treatment composition may include dyes, pigments, opacifiers, or other materials that absorb, block, reflect, or scatter ultraviolet light. Suitable opacifiers include styrene / acrylate copolymers or derivatives thereof, titanium dioxide, tin dioxide, any suitable form of modified TiO2 (e.g., carbon-modified TiO2 or metal-doped TiO2), tin oxide, bismuth oxychloride, bismuth oxychloride-coated TiO2 / mica, silica-coated TiO2, metal oxide-coated TiO2, or mixtures thereof. Such auxiliary agents can further help protect the delivery particles of this disclosure from prematurely releasing the encapsulated beneficial agent. Such auxiliary agents may be particularly useful when the treatment composition is housed in a transparent or translucent container.

[0126] consumer products This disclosure also relates to consumer products. Such consumer products comprise a container and a processing composition contained or placed within the container. The walls of the container are selected to block or absorb UV light in order to protect the delivery particles contained therein. Figure 1 shows a cross-sectional view of an exemplary consumer product 1 according to this disclosure.

[0127] Consumer product 1 includes a container 10. The container 10 has a closed end 12 having a closed end periphery 14. The periphery wall 16 extends upward to an open end 20 with respect to a longitudinal axis 18. The container 10 may also have a handle 22, which may be a through handle adjacent to a through hole 24. As shown in Figure 1, the container 10 may be in the form of a bottle.

[0128] The container 10 comprises a wall material 17. Preferably, at least the peripheral wall 16 contains the wall material 17. The wall material 17 may be petroleum-based or plant-based. Preferably, the wall material 17 is a thermoplastic material. Suitable thermoplastic materials may be selected from the group consisting of high-density polyethylene, low-density polyethylene, polypropylene, biaxially oriented polypropylene polyethylene, polyethylene terephthalate, polyethylene terephthalate glycol, processable polylactic acid, polyvinyl chloride, thermoplastic starch, cellulose bioplastics, aliphatic polyester, polylactic acid, and mixtures thereof.

[0129] Thermoplastic materials may include recycled materials, reground materials, or combinations thereof. Examples of “recycled” materials include post-consumer recycled (PCR) materials, post-industrial recycled (PIR) materials, and mixtures thereof. Examples of “regrind” materials include thermoplastic waste materials, such as sprues, runners, excess parison materials, and defective products from injection and blow molding and extrusion operations, which are recycled by shredding or granulation.

[0130] The container 10 can be formed by injection molding, injection stretch blow molding, extrusion blow molding, or a similar process. Preferably, the container 10 is a blow-molded container. The container 10 can be formed by injection stretch blow molding. The container 10 may also be a thermoformed container.

[0131] The wall material 17 is selected so as to be able to block or absorb ultraviolet (UV) light 51, preferably UV light 51 emitted by the sun 50. A suitable selection of the wall material 17 can preferably result in absorbed UV rays 52 and / or blocked or reflected UV rays 53.

[0132] The peripheral wall 16 (and / or wall material 17 if present inside the container 10) may be characterized by a light transmittance of less than 50%, preferably less than 25%, more preferably less than 10%, even more preferably less than 5%, and even more preferably less than 1% of the ultraviolet portion of the spectrum (e.g., wavelengths of about 1 nm to about 400 nm, preferably about 200 nm to about 400 nm, preferably about 280 nm to about 400 nm).

[0133] The wall material 17 may be opaque, which may be achieved by selecting a thermoplastic material and / or adding a suitable dye or opaque agent. By being opaque, the wall material 17 is expected to be able to advantageously block and / or absorb UV light. Examples of opaque wall materials that can be used include, but are not limited to, high-density polyethylene (HDPE), low-density polyethylene (LDPE), or mixtures thereof. The opaque wall material 17 may also contain spent recycled (PCR) material.

[0134] The wall material 17 may be transparent or translucent. Such a material may be preferable so that consumers can see the viscosity or volume concentration of the treatment composition 100 contained in the container 10. Examples of transparent wall materials that can be used include, but are not limited to, polypropylene (PP), polyethylene (PE), polycarbonate (PC), polyamide (PA), polyethylene terephthalate (PETE), polyvinyl chloride (PVC), and / or polystyrene (PS).

[0135] The peripheral wall 16 (and / or wall material 17 if present inside the container 10) may be characterized by a light transmittance of more than 25%, preferably more than 30%, more than 40%, or more than 50% in the visible portion of the spectrum (for example, wavelengths from about 410 nm to about 800 nm).

[0136] If the wall material 17 is transparent or translucent, it is preferable that the wall material 17 contains a UV light absorber. As used herein, the term “UV light absorber” includes any single compound or combination of compounds that absorb or reflect UV light when incorporated into the plastic package components in such a way that the transmission of UV light to the container contents is reduced. For example, a UV absorber preferably absorbs or reflects light in the wavelength range of about 200 nm to about 400 nm, preferably about 280 nm to about 400 nm. The wavelength range of light absorbed may vary outside the above range depending on the UV absorber used. The wall material may also absorb or reflect light in other spectra, as long as it absorbs or reflects light in at least one spectrum.

[0137] A suitable UV light absorber (sometimes called a "UV blocker" and / or "UV absorber") can be selected by those skilled in the art for the process of producing a given wall material 17 and / or container 10. For example, examples of UV light absorbers suitable as additives for plastic packaging can be found in the Handbook of Industrial Chemical Additives (VCH Publishers) and 2002 McCutcheon's, Volume 2: Functional Materials, North American Edition (The Manufacturing Confectioner Publishing Co.).

[0138] Suitable UV light absorbers include benzophenone, benzotriazole, oxalanilide, benzylidene malonate, phenyl-substituted triazine, salicylate, benzotriazole, hindered amine, alkoxy (e.g., methoxy) cinnamate, titanium dioxide (preferably ultrafine titanium dioxide), and zinc oxide. Among the available benzotriazole UV light absorbers is 2-(2-hydroxy-5-methylphenyl)benzotriazole, available as Tinuvin P from Ciba-Geigy Corp. in Tarrytown, New York. Other UV light absorbers include, but are not limited to, phenylbenzimidazole sulfonic acid (marketed by Haarmann and Reimer Corp. as Neo Heliopan, Type Hydro), 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid (marketed by Rhone-Poulenc as Syntase 230 and by BASF Corp. as Uvinul MS-40), sodium 2,2'-dihydroxy-4,4'-dimethoxy-5-sulfobenzophenone (marketed by BASF Corp. as Uvinul DS-49), and PEG-25 para-aminobenzoic acid (marketed by Basf Corp. as Uvinul P-25). Other examples of UV-blocking agents suitable for use include TINUVIN 234, TINUVIN 326, and TINUVIN 1577 (marketed by Ciba Speciality Chemicals, Inc.), as well as SANDUVOR VSU (oxalanilide derivative) and SANDUVOR 3035 (benzophenone) (marketed by Clariant Corporation).

[0139] The UV light absorber may be present in the wall material 17 at a concentration of about 0.01% to about 3% by weight, preferably about 0.01% to about 2% by weight.

[0140] The wall material 17 may contain a colorant, which can be selected from inorganic pigments, organic pigments, and / or organic dyes. The colorant can act to reduce the transmission of UV light through the wall. The colorant can be used in combination with a UV light absorber.

[0141] The container 10 may include a transition piece 26. The container may also include a spout 28 at the open end 20. The spout 28 may be part of the transition piece 26. The consumer product 1 may also include a closure 30, which can be used to seal the open end 20, for example, by snapping it onto the container 1, such as the transition piece 26, or by beginning to engage with it in a screwable manner. The closure 30 can be conveniently used as a dispensing cup.

[0142] The container 10 includes an internal volume 32 which may be formed by the closed end 12 and the peripheral wall 16. The container 10 may be any shape or size suitable for storing and packaging household liquids. For example, the container may have any size, but typically the container 10 will have a maximum capacity of about 0.05 to about 15 L, or about 0.1 to about 5 L, or about 0.2 to about 2.5 L.

[0143] The treatment composition 100 is contained within the container 1, specifically within the internal volume 32 of the container 1, or otherwise arranged. Preferably, the treatment composition 100 is in liquid form so that it can be dispensed from the opening end 20 by pouring. If the treatment composition is in solid form such as powder or beads / tablets, the composition may be dispensed, for example, by pouring or scooping.

[0144] The treatment compositions are as provided in this disclosure. The above disclosures relating to the treatment compositions, delivery particles, auxiliary components, etc., apply equally to this specification and will not be repeated for the sake of brevity and to provide more detail. In short, the treatment compositions comprise a group of delivery particles. The delivery particles comprise a core and a shell surrounding the core. The core comprises a beneficial agent, preferably an aromatic material comprising a fragrance raw material. The shell comprises a polymer material which is a reaction product of polyisocyanate and chitosan, preferably hydrolyzed chitosan. Preferably, the treatment composition is a fabric care composition, more preferably a fabric conditioning composition, and even more preferably a liquid fabric conditioning composition.

[0145] Figure 2 shows a consumer product 1 in which a container 10 containing a processed composition 100 further includes a sleeve 60 positioned on the peripheral wall 16 of the container 10. The sleeve 60 may function as a label and may include a printed mark thereon. The sleeve 60 is preferably a shrink sleeve and may be heat-shrinkable around the container 10. Alternatively, the sleeve 60 may be a stretch sleeve, into which a preform or parison is blown to stretch the stretch sleeve.

[0146] The sleeve 60 may include thermoplastic materials such as polyvinyl chloride (PVC), polyester terephthalate (PET), oriented polypropylene (OPP), and oriented polystyrene (OPS). The sleeve may consist of one or more layers (e.g., laminated layers). The layers may include a first layer and a second layer, and the first and second layers may be made from different materials. For example, the outer layer may be selected to be suitable for printing on.

[0147] If the container 10 is transparent or translucent, it may be advantageous for the sleeve 60 to be opaque and / or to contain a UV absorber in the area covering the transparent or translucent portion of the container 10 in particular. In such cases, it may not be very important that the wall material 17 of the container 10 contains a UV absorber. Alternatively, both the wall material 17 and the sleeve 60 may contain a UV absorber. The UV absorbers in the wall material 17 and the sleeve 60 may be different (e.g., different classes) if present in both. For example, the wall material 17 may contain a first UV absorber, and the sleeve 60 may contain a second UV absorber different from the first UV absorber. Additionally or alternatively, the UV absorber may be present in the wall material 17 at different weight percent concentrations compared to the sleeve 60. Preferably, the sleeve 60, being a thinner material, contains a higher weight percent of the UV absorber than the wall material.

[0148] The sleeve 60 may include one or more openings that can be aligned with the through-hole of the handle.

[0149] Method for manufacturing the processed composition This disclosure relates to a manufacturing process for any of the treatment compositions described herein. A process for producing a fabric care composition, which may be a consumer product composition, may include a step of combining a group of delivery particles with one or more auxiliary components, as described herein.

[0150] The delivery particles may be combined with one or more auxiliary components if the delivery particles are in one or more forms, including slurry form, neat particle form, and / or spray-dried particle form, preferably slurry form. The delivery particles may be combined with such auxiliary agents by methods including mixing and / or spraying.

[0151] The processed compositions disclosed herein can be formulated into any preferred form and can be compounded by any process selected by the compounder. One or more auxiliary components and delivery particles may be combined in a batch process, a circulating loop process, and / or an in-line mixing process. Suitable equipment for use in the processes disclosed herein includes continuous agitated tank reactors, homogenizers, turbine agitators, recirculation pumps, paddle mixers, high-shear mixers, static mixers, plow shear mixers, ribbon blenders, vertical shaft granulators and drum mixers (all in batch configuration and, where available, in continuous process configuration), spray dryers, and extruders.

[0152] As described herein, the treatment composition may be placed in a container to form a consumer product. The container may be a bottle, preferably a plastic bottle. The treatment composition may be placed in an aerosol or other spray container according to known methods.

[0153] combination The specific combinations contemplated in this disclosure are described herein in the following numbered and / or alphabetically designated paragraphs. These combinations are for illustrative purposes only and are not intended to be limiting.

[0154] 1. A method for treating a fabric, comprising the steps of: contacting the fabric with a treatment composition, wherein the treatment composition comprises a group of delivery particles, the contact step resulting in one or more of the delivery particles adhering to the surface of the fabric, the delivery particles comprising a core and a shell surrounding the core, the core comprising a beneficial agent and the shell comprising a polymer material which is a reaction product of polyisocyanate and chitosan; and exposing the delivery particles on the surface of the fabric to ultraviolet (UV) light, preferably UV light having a wavelength of about 200 nm to about 400 nm, more preferably about 280 nm to about 400 nm. 2. The method according to paragraph 1, wherein the beneficial agent comprises a fragrance raw material, preferably the fragrance raw material comprises at least about 20% by weight, preferably at least about 25% by weight, more preferably at least about 30% by weight, more preferably at least about 40% by weight, and even more preferably at least about 50% by weight of an aldehyde-containing fragrance raw material, a ketone-containing raw material, or a mixture thereof, of the aromatic fragrance raw material. 3. The method according to paragraph 1 or 2, wherein the chitosan is hydrolyzed chitosan. 4. Chitosan contains one or more of the following: a) A degree of deacetylation of at least 50%, preferably at least 75%, more preferably at least 85%, or even further at least 92%, and / or b) The method according to any one of paragraphs 1 to 3, characterized by a weight-average molecular weight of 95 kDa or less. 5. The shell must be at least approximately 21% by weight of the shell's weight. The method according to any one of paragraphs 1 to 4, comprising chitosan, preferably hydrolyzed chitosan, in a concentration of preferably about 21% to about 90% by weight, more preferably about 21% to about 85% by weight, even more preferably about 21% to about 75% by weight, or even more preferably about 21% to about 55% by weight. 6. The method according to any one of paragraphs 1 to 5, wherein the polyisocyanate is selected from the group consisting of polyisocyanurate of toluene diisocyanate, trimethylolpropane adduct of toluene diisocyanate and trimethylolpropane adduct of xylylene diisocyanate, methylenediphenyl isocyanate, toluene diisocyanate, tetramethylxylidene diisocyanate, naphthalene-1,5-diisocyanate, phenylenediisocyanate, or mixtures thereof. 7. The delivered particles go through the following process: A step of forming an aqueous phase by hydrolyzing chitosan in an aqueous acidic medium at a pH of 6.5 or less and a temperature of at least 60°C for at least 1 hour, A step of forming an oil phase, which optionally includes dissolving at least one beneficial agent and at least one polyisocyanate together with the additive oil, The process involves mixing the aqueous phase and the oil phase in an excess aqueous phase under high shear stirring to form an emulsion, thereby forming droplets of the oil phase and beneficial agent dispersed in the aqueous phase, and optionally adjusting the pH of the emulsion to a range of pH 2 to pH 6. The method according to any one of paragraphs 1 to 6, wherein the emulsion is formed by a process comprising: curing the emulsion by heating it to at least 40°C for a time sufficient to form a shell at the interface between the droplet and the aqueous phase, wherein the shell comprises a reaction product of polyisocyanate and hydrolyzed chitosan, and the shell surrounds a core containing droplets of the oil phase and a beneficial agent. 8. The method according to any one of paragraphs 1 to 7, wherein the weight ratio of hydrolyzed chitosan in the aqueous phase to polyisocyanate in the oil phase is about 21:79 to about 90:10, preferably about 1:2 to about 10:1, more preferably about 1:1 to about 7:1. 9. The method according to any one of paragraphs 1 to 8, wherein chitosan is formed by hydrolyzing chitosan in an acidic medium at a pH of 6.5 or less, preferably at a pH of about 3 to about 6, and at a temperature of at least 45°C for at least 1 hour. 10. The delivered particles are approximately 1 to 100 microns in size. The method according to any one of paragraphs 1 to 9, characterized in that it preferably has a volume-weighted median particle size of about 10 to about 100 microns, more preferably about 15 to about 60 microns, more preferably about 20 to about 50 microns, and even more preferably about 30 to about 40 microns. 11. The method according to any of paragraphs 1 to 10, wherein the delivered particles are characterized by a zeta potential of at least 15 millivolts (mV) at pH 4.5, or at least 40 mV at pH 4.5, or at least 60 mV at pH 4.5. 12. Test method: The method according to any of paragraphs 1 to 11, wherein the shell of the delivered particles degrades by at least 60% in 60 days when tested in accordance with OECD 301B. 13. The method according to any of paragraphs 1 to 12, wherein the contact step is performed during the washing cycle of an automatic washing machine. 14. The method according to any of paragraphs 1 to 13, wherein the contact step is performed during the rinse cycle of an automatic washing machine. 15. The method described in any of paragraphs 1-14, wherein the UV light source is sunlight. 16. The method according to any one of paragraphs 1 to 15, wherein at least a portion of the exposure step is carried out during a passive drying process, preferably outdoors. 17. The method according to any of paragraphs 1 to 16, wherein at least a portion of the exposure process is preferably carried out outdoors while the fabric is being worn by a person or used in any other way. 18. A method comprising the step of drying a fabric having one or more delivery particles on the surface of the fabric, Preferably, the method according to any one of paragraphs 1 to 17, further comprising the step of drying the fabric in an automatic drying process. 19. The processed composition further comprises one or more auxiliary components, Preferably, the method according to any one of paragraphs 1 to 18, wherein one or more auxiliary components include a quaternary ammonium ester material. 20. Consumer products, and the product is A container including wall material, The wall material is exposed to ultraviolet light, Preferably, a container capable of blocking or absorbing ultraviolet light having a wavelength of about 200 nm to about 400 nm, more preferably about 280 nm to about 400 nm, A processing composition contained within a container, The processing composition comprises a group of delivery particles, The delivery particle includes a core and a shell surrounding the core. The core contains beneficial agents, A consumer product comprising a processed composition in which the shell contains a polymer material which is a reaction product of polyisocyanate and chitosan. 21. The consumer product according to paragraph 20, wherein the beneficial agent comprises a fragrance raw material, preferably the fragrance raw material comprises at least about 20% by weight, preferably at least about 25% by weight, more preferably at least about 30% by weight, more preferably at least about 40% by weight, and even more preferably at least about 50% by weight of an aldehyde-containing fragrance raw material, a ketone-containing raw material, or a mixture thereof, of the aromatic fragrance raw material. 22. The consumer product according to paragraph number 20 or 21, wherein the chitosan is hydrolyzed chitosan. 23. Chitosan contains one or more of the following: a) A degree of deacetylation of at least 50%, preferably at least 75%, more preferably at least 85%, or even further at least 92%, and / or b) A consumer product as described in any of paragraphs 20 to 22, characterized by a weight-average molecular weight of 95 kDa or less. 24. The shell is at least about 21% by weight of the shell's weight. A consumer product according to any of paragraphs 20 to 23, comprising chitosan, preferably hydrolyzed chitosan, in a concentration of preferably about 21% to about 90% by weight, more preferably about 21% to about 85% by weight, even more preferably about 21% to about 75% by weight, or even more preferably about 21% to about 55% by weight. 25. A consumer product according to any of paragraphs 20 to 24, wherein the polyisocyanate is selected from the group consisting of polyisocyanurate of toluene diisocyanate, trimethylolpropane adduct of toluene diisocyanate and trimethylolpropane adduct of xylylene diisocyanate, methylenediphenyl isocyanate, toluene diisocyanate, tetramethylxylidene diisocyanate, naphthalene-1,5-diisocyanate, phenylenediisocyanate, or a mixture thereof. 26. The delivered particles go through the following process: A step of forming an aqueous phase by hydrolyzing chitosan in an aqueous acidic medium at a pH of 6.5 or less and a temperature of at least 60°C for at least 1 hour, A step of forming an oil phase, which optionally includes dissolving at least one beneficial agent and at least one polyisocyanate together with the additive oil, The process involves mixing the aqueous phase and the oil phase in an excess aqueous phase under high shear stirring to form an emulsion, thereby forming droplets of the oil phase and beneficial agent dispersed in the aqueous phase, and optionally adjusting the pH of the emulsion to a range of pH 2 to pH 6. A consumer product according to any one of paragraphs 20 to 25, formed by a process comprising: curing an emulsion by heating it to at least 40°C for a time sufficient to form a shell at the interface between a droplet and an aqueous phase, wherein the shell comprises a reaction product of polyisocyanate and hydrolyzed chitosan, and the shell surrounds a core containing droplets of an oil phase and a beneficial agent. 27. The consumer product according to paragraph 26, wherein the weight ratio of hydrolyzed chitosan in the aqueous phase to polyisocyanate in the oil phase is about 21:79 to about 90:10, preferably about 1:2 to about 10:1, more preferably about 1:1 to about 7:1. 28. A consumer product according to any one of paragraphs 20 to 27, wherein chitosan is formed by hydrolyzing chitosan in an acidic medium at a pH of 6.5 or less, preferably at a pH of about 3 to about 6, and at a temperature of at least 45°C for at least 1 hour. 29. The delivered particles are approximately 1 to 100 microns in size. A consumer product according to any one of paragraphs 20 to 28, characterized in that it preferably has a volume-weighted median particle size of about 10 to about 100 microns, more preferably about 15 to about 60 microns, more preferably about 20 to about 50 microns, and even more preferably about 30 to about 40 microns. 30. A consumer product according to any of paragraphs 20 to 29, wherein the delivered particles are characterized by a zeta potential of at least 15 millivolts (mV) at pH 4.5, or at least 40 mV at pH 4.5, or at least 60 mV at pH 4.5. 31. Test Method: When tested according to OECD 301B, the shell of the delivered particles degrades by at least 40% in 14 days, as described in any of paragraphs 20-30 of the consumer product. 32. The core of the fragrance encapsulation body is a distribution modifier, Preferably, vegetable oil, modified vegetable oil, C4-C 24 A partitioning modifier selected from the group consisting of mono-, di-, and tri-esters of fatty acids, isopropyl myristate, dodecanophenone, lauryl laurate, methyl behenate, methyl laurate, methyl palmitate, methyl stearate, and mixtures thereof. More preferably, the consumer product according to any of paragraphs 20 to 31, further comprising isopropyl myristate. 33. Consumer products described in any of paragraphs 20-32, where the wall material is opaque. 34. The wall material is transparent or translucent. The wall material contains a UV light absorber. Preferably, the consumer product according to any one of paragraphs 20 to 33, comprising a UV light absorber selected from the group consisting of benzophenone, benzotriazole, oxalanilide, benzylidene malonate, phenyl-substituted triazine, salicylate, benzotriazole, hindered amine, alkoxycinnamate, titanium dioxide, and zinc oxide. 35. The treatment composition further comprises one or more auxiliary components, Preferably, one or more auxiliary components include a quaternary ammonium ester material. More preferably, the consumer product according to any of paragraphs 20 to 34, wherein the quaternary ammonium ester material is present in a concentration of about 1% to about 35% by weight of the treated composition. 36. The treatment composition is in liquid form, The consumer product according to any one of paragraphs 20 to 35, preferably a liquid composition comprising about 50% to about 97% by weight, preferably about 60% to about 96% by weight, more preferably about 70% to about 95% by weight, and even more preferably about 80% to about 95% by weight of water in the treatment composition. 37. A consumer product according to any one of paragraphs 20 to 36, characterized in that the treated composition has a pH of about 2 to about 12, about 2 to about 8.5, about 2 to about 7, about 2 to about 5, about 2 to about 4, about 2 to about 3.7, more preferably about 2 to about 3.5. 38. A consumer product according to any one of paragraphs 20 to 37, wherein the treatment composition is a fabric care composition, preferably a fabric conditioning composition, more preferably a liquid fabric conditioning composition.

[0155] Test method It will be understood that the values ​​of each of the parameters of the subject matter of the present invention claimed and described herein should be determined using the test methods disclosed in the chapter on test methods of this application.

[0156] viscosity The viscosity of the final liquid product is measured using an AR550 rheometer / viscometer manufactured by TA Instruments (New Castle, DE, USA), with parallel steel plates having a diameter of 40 mm and a gap size of 500 μm. (20 seconds) -1 High shear viscosity and 0.05 seconds -1 The low shear viscosity in this case is 0.01 seconds over 3 minutes at 21°C. -1 ~25 seconds -1 It is obtained from the logarithmic shear rate sweep.

[0157] Fragrances, fragrance raw materials (PRMs), and / or partitioning modifiers. A. Identity and total quantity To identify the fragrance, fragrance components, or fragrance raw materials (PRM), or partitioning modifiers encapsulated in the capsule slurry and / or within the delivery agent inclusions, and to quantify their total weight, gas chromatography with a mass spectrometer / flame ionization detector (GC-MS / FID) is used. Suitable instruments include the Agilent Technologies G1530A GC / FID; Hewlett Packer Mass Selective Device 5973; and a 5%-phenyl-methylpolysiloxane column J&W DB-5 (length 30 m × inner diameter 0.25 mm × film thickness 0.25 μm). Approximately 3 g of the final product or suspension of the delivery inclusions is weighed and recorded, then the sample is diluted with 30 mL of deionized water and filtered through a nitrocellulose filter membrane with a pore size of 5.0 μm. The material captured on the filter is solubilized in 5 mL of ISTD solution (25.0 mg / L tetradecane in anhydrous alcohol) and heated at 60°C for 30 minutes. The cooled solution is filtered through a 0.45 μm pore PTFE syringe filter and analyzed via GC-MS / FID. Three known fragrance oils are used as comparative reference substances. Data analysis involves subtracting the ISTD area count from the total area count and summing them, and calculating the average response factor (RF) of the three standard fragrances. The response factor and total area count of the fragrances enclosed in the product, along with the weight of the sample, are then used to determine the total weight percentage of each PRM in the enclosed fragrance. PRMs are identified from the mass spectrometry peaks.

[0158] B. Amount of unsealed material To determine the amounts of unencapsulated fragrances and (optionally) partition-modified materials in a composition such as a slurry, the following apparatus may be used for this analysis, using the analytical procedure provided after the table.

[0159] [Table 1]

[0160] To prepare a fragrance standard in ISS hexane, weigh 0.050 ± 0.005 g of the desired PMC fragrance oil into a 50 mL volumetric flask (or another volumetric size, recalculating the amount of fragrance oil to be added in grams). Fill the flask to the line using the ISS hexane solution from above. ISS hexane is 0.1 g of tetradecane in 4 liters of hexane.

[0161] To prepare a 5% surfactant solution, weigh 50 g ± 1 g of sodium dodecyl sulfate into a beaker, and quantitatively transfer it to a 1 liter volumetric flask using purified water, ensuring that the surfactant is completely dissolved.

[0162] To prepare a sample of the PMC composition (e.g., slurry), ensure that the composition (e.g., slurry) is thoroughly mixed. Mix as needed. Weigh 0.3 ± 0.05 g of the composition sample into the bottom of a 10 mL vial. Avoid allowing the composition to adhere to the walls of the vial.

[0163] To operate the instrument, target ions for quantification of each PRM (and optionally, partitioning modifier) ​​are determined, along with a minimum of one, preferably two, confirmatory ions. Calibration curves are generated from fragrance standards for each PRM. Using the sample weight and the weight percent of each PRM, the integral and amount of extracted ions (EIC) for each PRM are plotted or recorded.

[0164] The amount of free oil is determined from the response of each PRM to the calibration curve and is summed across all different fragrance materials and, optionally, the partition modifier.

[0165] C. Determination of enclosed materials The determination of the enclosed oil and, optionally, the partitioning modifier, is made by subtracting the weight of the free / unenclosed oil found in the composition from the total weight of the oil found in the composition (e.g., slurry).

[0166] Test methods for determining LogP For each material being tested (e.g., each PRM in a fragrance mixture), calculate the log value (logP) of the octanol / water partition coefficient. The logP values ​​for individual materials (e.g., PRMs) are calculated using the Consensus logP Computational Model, version 14.02 (Linux®), available from Advanced Chemistry Development Inc. (ACD / Lab) (Toronto, Canada), to obtain dimensionless logP values. The ACD / Labs Consensus logP Computational Model is part of the ACD / Labs model suite.

[0167] Volume-weighted particle size and size distribution The volume-weighted particle size distribution is determined by single-particle optical sensing (SPOS), also known as optical particle counting (OPC), using the AccuSizer 780 AD instrument and its accompanying software CW788 version 1.82 (Particle Sizing Systems, Santa Barbara, California, USA) or equivalent. The instrument is configured with the following conditions and options: flow rate = 1 ml / sec, small diameter threshold = 0.50 μm, sensor model number = LE400-05 or equivalent, auto-dilution = on, acquisition time: 60 seconds, number of channels = 512, fluid volume in container = 50 ml, maximum simultaneous count = 9200. Measurement is initiated by cooling the sensor by flushing it with water until the background count is less than 100. Samples of delivery capsules are introduced into the suspension, and the capsule density is adjusted as needed via autodilution with deionized water so that the capsule count is at least 9200 per ml. The suspension is analyzed over 60 seconds. The obtained volume-weighted PSD data are plotted and recorded, and the desired volume-weighted particle size values ​​(e.g., median / 50th percentile, 5th percentile, and / or 90th percentile) are determined.

[0168] The broadness index can be calculated by determining the delivery particle size (90% size) where more than 90% of the cumulative particle volume is reached, the particle size (5% size) where more than 5% of the cumulative particle volume is reached, and the median volume-weighted particle size (50% size - where both the particle volume above and below this size equals 50% of the total particle volume). Broadness Index = ((90% size) - (5% size)) / 50% size

[0169] Procedure for determining the percentage of decomposition To determine the percentage of decomposition, the procedure described in the OECD Guideline for Testing of Chemicals 301B CO2Evolution (Modified Sturm Test), adopted on July 17, 1992, is used. For ease of reference, this test method is referred to herein as Test Method OECD 301B.

[0170] Procedure for determining free oil This method involves measuring the amount of oil in the aqueous phase and using 1 mg / ml dibutyl phthalate (DBP) / hexane as the internal standard solution.

[0171] Weigh slightly more than 250 mg of DBP into a small beaker, transfer it to a 250 ml beaker, and rinse the beaker thoroughly. Fill the beaker with hexane up to 250 ml.

[0172] Sample preparation: Weigh approximately 1.5-2 grams (40 drops) of capsule slurry into a 20 ml scintillation vial, add 10 ml of ISTD solution, and tightly seal the vial. Shake vigorously several times over 30 minutes, then pipette the solution into an autosampler vial and analyze by GC.

[0173] Additional details. Equipment usage: HP5890 GC connected to HP Chem Station Software; Column: 5m x 0.32mm inner diameter (using 1μm DB-1 liquid phase); Heat to 50°C for 1 minute, then to 320°C at 15°C / min; Injector: 275°C; Detector: 325°C; Inject 2μl.

[0174] Calculation: For both the sample and calibration, add the total peak area minus the DBP area.

[0175] Calculate the amount of free core oil in mg.

[0176]

number

[0177] Calculate the percentage of free core oil.

[0178]

number

[0179] Procedure for determining the leakage of beneficial agents Two 1-gram samples of the beneficial agent particle composition are obtained. 1 gram (Sample 1) of the particle composition is added to a 99-gram product matrix in which the particles will be used. The particle-containing product matrix (Sample 1) is aged for 2 weeks at 35°C in a sealed glass bottle. The other 1-gram sample (Sample 2) is aged in the same manner.

[0180] After two weeks, the particles of the particulate composition (Sample 2) are recovered from the product matrix (Sample 1) and particulate composition (Sample 2) using filtration. Each particulate sample is treated with a solvent that extracts all beneficial agents from the particles of each sample. The beneficial agent-containing solvent from each sample is injected into a gas chromatograph, and the peak area is integrated to determine the total amount of beneficial agents extracted from each sample.

[0181] The percentage of beneficial agent leakage is determined by calculating the difference between the value obtained from the total amount of beneficial agent extracted from sample 2 and the value obtained from sample 1, and is expressed as the percentage of the total amount of beneficial agent extracted from sample 2, which is represented by the following equation.

[0182]

number

[0183] The embodiments provided below are intended to be illustrative and not limiting.

[0184] Example of synthesis In the following examples, the abbreviations correspond to the materials listed in Table 1.

[0185] [Table 2]

[0186] Synthesis Example 1 The aqueous phase is prepared by dispersing 12.40 g of ChitoClear in 350.00 g of water while stirring in a jacketed reactor. The pH of the aqueous phase is then adjusted to 4.7 using concentrated HCl while stirring. The aqueous phase temperature is then raised to 85°C over 60 minutes and maintained at 85°C for a period of time to hydrolyze the ChitoClear. After the hydrolysis step over a period of 90 minutes, the aqueous phase temperature is then lowered to 25°C. The oil phase is prepared by mixing 87.50 g of fragrance oil and 22.50 g of isopropyl myristate with 15.00 g of Takenate D-110N at room temperature. The oil phase is added to the aqueous phase under high shear milling to obtain an emulsion. The emulsion is heated to 40°C over 30 minutes and held for 60 minutes. The emulsion is then heated to 85°C and maintained at this temperature for 6 hours while stirring.

[0187] Synthesis Example 2 The aqueous phase is prepared by dispersing 26.45 g of ChitoClear in 450.00 g of water while stirring in a jacketed reactor. The pH of the aqueous phase is then adjusted to 6.0 using concentrated HCl while stirring. The aqueous phase temperature is then raised to 85°C over 60 minutes and maintained at 85°C for a period of time to hydrolyze the ChitoClear. After the hydrolysis step over a period of 90 minutes, the aqueous phase temperature is then lowered to 25°C. The oil phase is prepared by mixing 159.38 g of fragrance oil and 23.91 g of isopropyl myristate with 4.00 g of Takenate D-110N at room temperature. The oil phase is added to the aqueous phase under high shear milling to obtain an emulsion. The emulsion is heated to 40°C over 30 minutes and held for 60 minutes. The emulsion is then heated to 85°C and maintained at this temperature for 6 hours while stirring.

[0188] Synthesis Example 3 The aqueous phase is prepared by dispersing 5.70 g of ChitoClear in 350.00 g of water while mixing in a jacketed reactor. The pH of the aqueous phase is then adjusted to 4.7 using concentrated HCl while stirring. The aqueous phase temperature is then raised to 85°C over 60 minutes and maintained at 85°C for a period of time to hydrolyze the ChitoClear. After the hydrolysis step over a period of 90 minutes, the aqueous phase temperature is then lowered to 25°C. The oil phase is prepared by mixing 120.00 g of perfume oil and 30.00 g of isopropyl myristate with 3.78 g of Mondur MR at room temperature. The oil phase is added to the aqueous phase under high shear milling to obtain an emulsion. The emulsion is heated to 40°C over 30 minutes and held for 60 minutes. The emulsion is then heated to 85°C and maintained at this temperature for 6 hours while mixing.

[0189] Synthesis Example 4 The aqueous phase is prepared by dispersing 5.70 g of ChitoClear in 350.00 g of water while stirring in a jacketed reactor. The pH of the aqueous phase is then adjusted to 4.0 using concentrated HCl while stirring. The aqueous phase temperature is then raised to 85°C over 60 minutes and maintained at 85°C for a period of time to hydrolyze the ChitoClear. After the hydrolysis step over a period of 90 minutes, the aqueous phase temperature is then lowered to 25°C. The oil phase is prepared by mixing 150.00 g of SAS-305 with 3.78 g of Mondur MR at room temperature. The oil phase is added to the aqueous phase under high shear milling to obtain an emulsion. The emulsion is heated to 40°C over 30 minutes and held for 60 minutes. The emulsion is then heated to 85°C and maintained at this temperature for 6 hours while stirring.

[0190] Performance Examples: Olfactory performance upon exposure to UV light. To test the performance of the delivery particles of this disclosure under UV light, a fabric is prepared by providing the delivery particles in a “forced adhesion” procedure in which a diluted particle slurry is applied directly to a target fabric. In this procedure, fabric swatches (approximately 1.5–2 g each) are provided.

[0191] Two fragrance delivery particle slurries are provided. The first slurry comprises comparative core / shell particles, the shell being formed from a polyacrylate polymer. The second slurry comprises core / shell delivery particles according to this disclosure, the shell being a polyisocyanate / chitosan shell. The same fragrance material is provided in the core of each particle group at substantially the same activity level.

[0192] For each slurry, a first dilution is formed by diluting 0.5 g of the slurry with 90 g of demineralized water. From each first dilution, a second dilution is formed by diluting approximately 0.08 g of the first dilution with approximately 10 g of demineralized water.

[0193] To deliver the particles to the fabric, apply approximately 1.1 g of the second diluent to each fabric swatch. Add the second diluent, prepared from the first (comparative) slurry, to half of the fabric swatch. These are called Group A swatches. Add the second diluent, prepared from the second slurry, to the other half. These are called Group B swatches.

[0194] [Table 3]

[0195] Dry the fabric swatches overnight on a drying rack. After the fabric swatches are dry, divide each of the swatches from groups A and B into two subgroups. Keep half of the subgroups in the dark. Expose the other half to ultraviolet (UV) light.

[0196] The UV light is supplied by a UV lamp (e.g., Analytik Jena US, California, USA; Model UVP UVGL-58; 6 watts; 0.16 amps) and is set to provide UV at a wavelength of 254 nm (short wave) at a distance of 10 cm from the fabric. Based on the settings, no significant heat is added or temperature rise is generated due to the lamp.

[0197] The treated fabrics were evaluated by a small-panel olfactory test. Panelists smelled the test fabrics under each condition (dark / UV light) and evaluated which group (distinguished by the applied delivery particles, A or B) provided a stronger fragrance at the dry fabric odor (DFO) touchpoint. The evaluation was determined at initial time (time 0), then at 1 hour and 3 hours. The results are shown in Table 1 below. In the table, Group A is indicated by an asterisk to show that they contain the comparative delivery particles. * It is marked with ).

[0198] [Table 4]

[0199] As shown in Table 1, fabric swatches from Group A treated with comparative polyacrylate delivery particles exhibit relatively high fragrance intensity at the initial start time (time 0). After 3 hours, the fragrance intensity at 3 hours of storage was relatively similar for both swatches, regardless of light conditions, indicating little difference between particles in terms of DFO intensity after long periods.

[0200] However, interesting results emerge at the one-hour mark. The fabric swatches from Group A provided a higher fragrance intensity at the start time, and continued to provide a higher intensity even after being stored in the dark for one hour. However, for the fabric swatches stored under UV light, Group B, containing polyisocyanate / chitosan delivery particles, provided a relatively high fragrance intensity at the one-hour mark.

[0201] It should be noted that, as a result of the size and position of the UV lamp used in the test, the light will provide a greater intensity than that provided by the sun for a given surface area. Therefore, the effect shown under a UV lamp after one hour of exposure is considered to be comparable to the UV exposure experienced under longer periods of exposure in natural sunlight. In consideration of this, the delivery particles of this disclosure are considered to provide an enhanced olfactory experience when a fabric treated with the particles is exposed to sunlight, for example, when the fabric is removed from an outdoor clothesline and folded, or when the treated garment is worn outdoors in sunlight.

[0202] The dimensions and values ​​disclosed herein should not be understood as being strictly limited to the exact numerical values ​​listed. Instead, unless otherwise indicated, each such dimension is intended to mean both the listed value and the functionally equivalent range encompassing that value. For example, a dimension disclosed as "40 mm" is intended to mean "approximately 40 mm".

[0203] All documents referenced herein, including any patents or patent applications that are cross-referenced or related, and any patent applications or patents for which this application claims priority or benefit thereof, are incorporated herein by reference in their entirety unless otherwise explicitly stated to be excluded or limited. No document reference shall be deemed prior art to any invention disclosed or claimed herein, nor shall it be deemed to teach, suggest or disclose any such invention, either alone or in combination with any other reference(s). Furthermore, if any meaning or definition of a term in this document conflicts with any meaning or definition of the same term in any document incorporated by reference, the meaning or definition given to the term in this document shall prevail.

[0204] While specific embodiments of the present invention have been illustrated and described, it will be apparent to those skilled in the art that various other changes and modifications can be made without departing from the spirit and scope of the invention. Therefore, it is intended that all such changes and modifications within the scope of the invention be covered in the appended claims.

Claims

1. A method for processing fabric, A step of bringing a fabric into contact with a treatment composition, The processing composition comprises a group of delivery particles, The aforementioned contact step results in one or more of the delivered particles adhering to the surface of the fabric. The delivery particle includes a core and a shell surrounding the core, The core contains a beneficial agent including a fragrance raw material, The process involves contacting the shell, which contains a polymer material that is a reaction product of polyisocyanate and hydrolyzed chitosan, The process includes exposing the delivery particles on the surface of the fabric to ultraviolet (UV) light, The hydrolyzed chitosan is formed by hydrolyzing chitosan in an acidic medium at a pH of 6.5 or less and at a temperature of at least 60°C for at least 1 hour. The hydrolyzed chitosan is one or more of the following: a) at least 50% degree of deacetylation, and / or b) Weight-average molecular weight of 95 kDa or less It is characterized by, A method comprising housing the aforementioned treatment composition in a container capable of blocking or absorbing ultraviolet light.

2. The method according to claim 1, wherein the fragrance raw material comprises at least 20% by weight of an aldehyde-containing fragrance raw material, a ketone-containing raw material, or a mixture thereof, of the fragrance raw material.

3. The method according to claim 1, wherein the shell contains hydrolyzed chitosan at a concentration of at least 21% by weight of the shell.

4. The method according to claim 1, wherein the polyisocyanate is selected from the group consisting of polyisocyanurate of toluene diisocyanate, trimethylolpropane adduct of toluene diisocyanate and trimethylolpropane adduct of xylylene diisocyanate, methylenediphenyl isocyanate, toluene diisocyanate, tetramethylxylidene diisocyanate, naphthalene-1,5-diisocyanate, phenylenediisocyanate, or mixtures thereof.

5. The aforementioned delivered particles are subjected to the following process: The process involves forming an aqueous phase by hydrolyzing chitosan in an aqueous acidic medium at a pH of 6.5 or less and a temperature of at least 60°C for at least one hour. A step of forming an oil phase, which optionally includes dissolving at least one beneficial agent and at least one polyisocyanate together with the additive oil, A step of forming an emulsion by mixing the aqueous phase and the oil phase in an excess of the aqueous phase under high shear stirring, thereby forming droplets of the oil phase and beneficial agent dispersed in the aqueous phase, and optionally adjusting the pH of the emulsion to a range of pH 2 to pH 6, The method according to claim 1, comprising the step of curing the emulsion by heating it to at least 40°C for a time sufficient to form a shell at the interface between the droplet and the aqueous phase, wherein the shell comprises the reaction product of the polyisocyanate and hydrolyzed chitosan, and the shell surrounds the core comprising the droplet of the oil phase and beneficial agent.

6. The method according to claim 5, wherein the weight ratio of hydrolyzed chitosan in the aqueous phase to the polyisocyanate in the oil phase is 21:79 to 90:

10.

7. The method according to claim 1, wherein the contact step is performed during the rinse cycle of an automatic washing machine.

8. The method according to claim 1, wherein the UV light source is sunlight.

9. The method according to claim 1, wherein at least a portion of the exposure step is performed during a passive drying process.

10. The method according to claim 1, wherein at least a portion of the exposure step is performed while the fabric is being worn by a person or otherwise used.

11. The aforementioned treatment composition further comprises one or more auxiliary components, The method according to claim 1, wherein the one or more auxiliary components include a quaternary ammonium ester material.

12. A consumer product used in a method for processing fabrics as described in claim 1, wherein the product is A container including wall material, The aforementioned wall material is capable of blocking or absorbing ultraviolet light, and the container is A processing composition contained in the aforementioned container, The processing composition comprises a group of delivery particles, The delivery particle includes a core and a shell surrounding the core, The core contains a beneficial agent including a fragrance raw material, A consumer product comprising a processed composition in which the shell contains a polymer material which is a reaction product of polyisocyanate and hydrolyzed chitosan.

13. The consumer product according to claim 12, wherein the wall material is opaque.

14. The aforementioned wall material is transparent or translucent. The consumer product according to claim 12, wherein the wall material contains a UV light absorber.

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