High core: Consumer products containing delivery particles with a high wall ratio.

Abstract

A consumer product composition comprising a population of delivery particles, the delivery particles comprising a core and a polymeric wall surrounding the core, the polymeric wall being derived from a (meth)acrylate monomer and at least one free radical initiator, the core comprising a benefit agent such as a fragrance, the core and the polymeric wall being present in a weight ratio of about 95:5 to about 99.5:0.5, and the initiator being typically used at a certain concentration. Related methods of making and using such consumer product compositions.

Description

[Technical Field]

[0001] This disclosure relates to a consumer product composition comprising a collection of delivery particles, the delivery particles comprising a core and a polymer wall surrounding the core. The polymer wall may be derived from a (meth)acrylate monomer and at least one free radical initiator, and the core comprises a beneficial agent such as a fragrance. The core and the polymer wall are present in a weight ratio of about 95:5 to about 99.5:0.5, and typically the initiator is used at a certain concentration. This disclosure also relates to methods for preparing and using such consumer product compositions. [Background technology]

[0002] Core / shell delivery particles can be an efficient and desirable method for delivering beneficial agents in various consumer products. Typical delivery particles often include a polymer wall surrounding a core, with the core containing the beneficial agent. The wall can be made from polyacrylate polymers, which can be formed from acrylate-containing monomers via a free radical polymerization reaction through the use of one or more free radical initiators. Known delivery particles may have core material and wall material present in a weight ratio of, for example, about 80:20 to about 90:10.

[0003] For reasons of delivery efficiency, it may be advantageous to use delivery particles with a relatively high packing capacity. While such particles can theoretically be achieved simply by increasing the core-to-wall weight ratio, in practice, the resulting particles often do not perform very well. For example, as a result of the relatively reduced presence of wall material, the particles tend to have a high leakage rate. Furthermore, such particles may be relatively brittle and may rupture prematurely, resulting in the release of beneficial agents at undesirable times.

[0004] Furthermore, these problems have been found to be particularly pronounced in delivery particles having a polyacrylate wall and a high core-to-wall weight ratio, when the beneficial agent in the core contains an aldehyde or ketone moiety.

[0005] Interestingly, when similar particles are fabricated with a lower core-to-wall weight ratio, such as approximately 90:10, leakage and / or brittleness tend not to be an issue, even though both capsules are made from the same polymer wall material. [Overview of the project] [Problems that the invention aims to solve]

[0006] In particular, when the core contains one or more beneficial agents, including aldehyde and / or ketone moieties, there is a need for consumer products containing high-volume delivery particles that offer improved performance. [Means for solving the problem]

[0007] This disclosure relates to consumer product compositions comprising a collection of delivery particles. The delivery particles are typically characterized by a relatively high core-to-wall weight ratio and a specific amount of free radical initiator used to create the polymer wall of the particles.

[0008] For example, the present disclosure relates to a consumer product composition comprising a group of delivery particles, each delivery particle comprising a core and a polymer wall surrounding the core, wherein the polymer wall comprises a (meth)acrylate polymer at least partially derived from a wall monomer and at least one free radical initiator, the wall monomer comprising at least 50% by weight of the (meth)acrylate monomer of the wall monomer, and at least one free radical initiator present at a concentration of about 15% to about 60% by weight of the polymer wall, the core comprising a beneficial agent, and the core and the polymer wall present in a weight ratio of about 95:5 to about 99.5:0.5, and a consumer product auxiliary material.

[0009] The Disclosure also relates to a consumer product comprising a processing aid and a group of delivery particles, wherein the delivery particles comprise a core and a polymer wall surrounding the core, and the delivery particles provide an oil phase comprising a beneficial agent, wherein the oil phase preferably further comprises a distribution modifier; dissolving or dispersing one or more oil-soluble or oil-dispersible wall monomers in the oil phase, wherein the wall monomer comprises at least 50% by weight of (meth)acrylate monomers, preferably at least three, preferably at least four, at least five, or even more than at least six radically polymerizable functional groups, wherein at least one of the radically polymerizable groups is acrylate or methacrylate; and dissolving or dispersing at least one free radical initiator (e.g., a first) in the oil phase. The present invention relates to a consumer product that can be obtained by a process comprising: providing a free radical initiator; providing an aqueous phase comprising an emulsifier or surfactant and optionally at least one other free radical initiator (e.g., a second free radical initiator); emulsifying an oil phase into an aqueous phase under high shear stirring to form an oil-in-water emulsion comprising droplets of the oil phase dispersed in the aqueous phase; and reacting dissolved or dispersed monomers by heating or chemical irradiation of the emulsion to form a polymer wall at the interface between the droplets and the aqueous phase, thereby yielding delivery particles having a core surrounded by a polymer wall, wherein one or more free radical initiators constitute about 15% to 60% by weight of the polymer wall, and the core and polymer wall are present in a weight ratio of about 95:5 to about 99.5:0.5.

[0010] This disclosure also relates to a method for treating a surface, which optionally includes the step of bringing the surface into contact with a consumer product composition described herein, in the presence of water. [Modes for carrying out the invention]

[0011] This disclosure relates to a consumer product comprising delivery particles characterized by a relatively high core-to-wall weight ratio. The particle core contains one or more beneficial agents, including aldehyde and / or ketone moieties. The particle wall comprises a polyacrylate polymer partially formed with at least one free radical initiator.

[0012] Surprisingly, it has been found that when forming delivery particles with a relatively high core-to-wall ratio, particularly when the beneficial agent contains a material having an aldehyde or ketone moiety, the concentration of the free radical initiator can affect the performance profile (e.g., leakage and / or fracture strength). This disclosure generally relates to careful selection of the free radical initiator concentration to provide desirable delivery particles.

[0013] While not bound by theory, the presence of aldehyde / or ketone-containing beneficial agents is thought to interfere with the reaction between free radical initiators and wall monomers, thereby negatively impacting wall robustness. When the amount of wall monomers is relatively high, the interaction may have only a relatively small effect on wall formation, and indeed, many monomers are available to construct robust walls. However, when the amount of wall monomers is relatively low, the aldehyde / ketone is thought to compete with the acrylate monomer of the free radical initiator, resulting in relatively poor wall formation. This competition is thought to arise through intermolecular interactions and transient radical pickup, due to the presence of the same or similar functional groups in the material and higher concentrations in a high core:wall environment.

[0014] However, it is believed that the problem of competition for acrylate monomers cannot be overcome simply by adding large amounts of free radical initiators. For example, it has also been found that when the amount of free radical initiator is relatively high compared to the amount of wall monomers, poorly performing capsules are formed. Without being bound by theory, when the initiator is relatively excessive, many simultaneous polymerization reactions are brought about, resulting in relatively short polymers and, consequently, weak particle walls. Additionally or alternatively, due to the relatively high amount of initiator, there is simply less structural monomer available to make the polymer of the polymer wall. These particles tend to be characterized by relatively low breaking strength, resulting in poor performance at the desired touch points.

[0015] The inventors have surprisingly found that by selecting an appropriate concentration of free radical initiator compared to the amount of wall monomer and / or the resulting wall polymer, particularly when the particles have a high core:wall weight ratio, polyacrylate-based delivery particles having advantageous leakage and / or breaking strength profiles are provided. Consumer products formulated using these delivery particles are expected to exhibit improved olfactory performance and / or improved stability.

[0016] Delivery particles, related consumer products, and related methods are discussed in more detail below.

[0017] As used herein, the articles "a" and "an" when used in the claims are understood to mean one or more of what is claimed or described. As used herein, the terms "include", "includes", and "including" are meant to be non-limiting. The compositions of the present disclosure can contain, consist essentially of, or consist of the components of the present disclosure.

[0018] 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 indicated material is present only as an impurity in 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.

[0019] As used herein, “Consumer Products” means baby care, beauty care, textile and home care, family care, women’s care, and / or healthcare products or devices intended for use or consumption in the form in which they are sold and not intended for subsequent commercial manufacture or modification. Such products include diapers, breast coverings, and wipes; products and / or methods relating to the treatment of human hair (including bleaching, coloring, dyeing, conditioning, shampooing, and styling); deodorants and antiperspirants; personal cleansers; skincare, including the application of creams, lotions, and other topical products for consumer use; and shaving products, textiles, hard surfaces, and any other surfaces in the textile and home care field (including air care, automotive care, dishwashing, and textile conditioning (including softening)). Examples of products and methods related to toilet paper, tissues, paper handkerchiefs, and / or paper towels; tampons, sanitary napkins; adult incontinence products; products and / or methods related to oral care, including toothpaste, toothpaste gel, tooth rinse, denture adhesive, and teeth whitening agents; over-the-counter healthcare products, including cough and cold remedies; pest control products; and purified water.

[0020] 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 improving 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.

[0021] When used herein, references to the terms "(meth)acrylate" or "(meth)acrylic" should be understood to mean both the acrylate and methacrylate versions of the specified monomer, oligomer, and / or prepolymer. For example, "allyl (meth)acrylate" indicates the possibility of both allyl methacrylate and allyl acrylate; similarly, references to alkyl esters of (meth)acrylic acid indicate the possibility of both alkyl esters of acrylic acid and alkyl esters of methacrylic acid; and similarly, poly(meth)acrylate indicates the possibility of both polyacrylate and polymethacrylate. Poly(meth)acrylate materials include, for example, polyester poly(meth)acrylate, urethane and polyurethane poly(meth)acrylate (especially those prepared by the reaction of hydroxyalkyl(meth)acrylate with polyisocyanate or urethane polyisocyanate), methyl cyanoacrylate, ethyl cyanoacrylate, diethylene glycol di(meth)acrylate, trimethylolpropane tri(meth)acrylate, ethylene glycol di(meth)acrylate, allyl(meth)acrylate, glycidyl(meth)acrylate, (meth)acrylate-functionalized silicones, di-, tri-, and tetraethylene glycol di(meth)acrylate, and dipropylene glycol di(meth)acrylate. It is intended to encompass a wide range of polymer materials, including acrylates, polyethylene glycol di(meth)acrylate, di(pentamethylene glycol) di(meth)acrylate, ethylene di(meth)acrylate, neopentyl glycol di(meth)acrylate, trimethylolpropane tri(meth)acrylate, ethoxylated bisphenol A di(meth)acrylate, bisphenol A di(meth)acrylate, diglycerol di(meth)acrylate, tetraethylene glycol dichloroacrylate, 1,3-butanediol di(meth)acrylate, neopentyl di(meth)acrylate, trimethylolpropane tri(meth)acrylate, and various polyfunctional (meth)acrylates. Monofunctional (meth)acrylates, i.e., those containing only one (meth)acrylate group, may also be advantageously used.Typical mono(meth)acrylates include 2-ethylhexyl(meth)acrylate, 2-hydroxyethyl(meth)acrylate, cyanoethyl(meth)acrylate, 2-hydroxypropyl(meth)acrylate, p-dimethylaminoethyl(meth)acrylate, lauryl(meth)acrylate, cyclohexyl(meth)acrylate, tetrahydrofurfuryl(meth)acrylate, chlorobenzyl(meth)acrylate, aminoalkyl(meth)acrylate, various alkyl(meth)acrylates, and glycidyl(meth)acrylate. Mixtures of (meth)acrylates or their derivatives, as well as combinations of one or more (meth)acrylate monomers, oligomers, and / or prepolymers or derivatives thereof, with other copolymerizable monomers including acrylonitrile and methacrylonitrile, may also be used.

[0022] As used herein, “delivery particle,” “particle,” “encapsulation,” “microcapsule,” and “capsule” are interchangeable unless otherwise indicated. As used herein, these terms typically refer to a core / shell delivery particle.

[0023] For the purposes of facilitating references within this specification and the claims, the terms “monomer” or “monomers” as used herein with respect to structural materials forming the wall polymer of delivery particles should be understood as monomers, but also include oligomers and / or prepolymers formed from specific monomers.

[0024] As used herein, the terms “free radical initiator,” “free radical initiator (initiating agent),” “initiator,” and “initiating agent” are interchangeable unless otherwise indicated.

[0025] Unless otherwise noted, all concentrations of components or compositions relate 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.

[0026] All temperatures in this specification are in degrees Celsius (°C) unless otherwise specified. Unless otherwise specified, all measurements in this specification are performed at 20°C and atmospheric pressure.

[0027] In all embodiments of this disclosure, all percentages are relative to the total weight of the composition unless otherwise specifically stated. Unless otherwise specifically stated, all ratios are by weight.

[0028] It should be understood that all maximum numerical limits given throughout this specification include all lower numerical limits to the same extent as such lower numerical limits are expressly stated herein. All minimum numerical limits given throughout this specification include all higher numerical limits to the same extent as such higher numerical limits are expressly stated herein. All numerical ranges given throughout this specification include all narrow numerical ranges that fall within such wider numerical ranges to the same extent as such narrow numerical ranges are all expressly stated herein.

[0029] consumer product compositions This disclosure relates to consumer product compositions (or, as used herein, simply “Compositions”). The compositions of this disclosure may include a collection of delivery particles and consumer product auxiliary materials, each described in more detail below.

[0030] The consumer product compositions of this disclosure may be useful for baby care, beauty care, fabric care, home care, family care, women's care, and / or healthcare applications. The consumer product compositions may be useful for treating surfaces such as fabrics, hair, or skin. The consumer product compositions may be intended to be used or consumed in the form in which they are sold. The consumer product compositions may not be intended for subsequent commercial manufacture or modification.

[0031] Consumer product compositions may include fabric care compositions, hard surface cleaning compositions, dish care compositions, hair care compositions (such as shampoo or conditioner), body cleansing compositions, or mixtures thereof.

[0032] Consumer product compositions may include fabric care compositions such as laundry detergent compositions (including strong liquid detergents or unit-dose articles), fabric conditioning compositions (including liquid fabric softening and / or improving compositions), laundry additives, fabric pretreatment compositions (including sprays, pourable liquids, or sprays), fabric refresher compositions (including sprays), or mixtures thereof.

[0033] The composition may be a beauty care composition, for example, a hair treatment product (including shampoo and / or conditioner), a skin care product (including cream, lotion, or other topical application product for consumer use), a shaving care product (including shaving lotion, foam, or pre- or post-shaving treatment), a personal cleansing product (including liquid body wash, liquid hand soap, and / or bar soap), a deodorant and / or antiperspirant, or a mixture thereof.

[0034] The composition may be a home care composition for air care, car care, dishwashing, hard surface cleaning and / or treatment, and other cleaning for consumer or commercial use.

[0035] The consumer product 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, a lozenge or beads, a fibrous article, a tablet, a stick, a bar, a flake, a foam / mousse, a nonwoven sheet, or a mixture thereof.

[0036] The composition may be in liquid form. The liquid composition may contain water in amounts ranging from about 30% by weight, or about 40% by weight, or about 50% by weight to about 99% by weight, or about 95% by weight, or about 90% by weight, or about 75% by weight, or about 70% by weight, or about 60% by weight of the composition. The liquid composition may be a liquid laundry detergent, a liquid fabric softener, a liquid dish soap, a hair shampoo, a hair conditioner, or a mixture thereof.

[0037] The composition may be in solid form. The solid composition may be in powder or granular form. Such a composition may be agglomerated or spray-dried. Such a composition may consist of a plurality of granules or particles, at least some of which contain different compositions. The composition may be a powder or granular cleaning composition which may contain a bleaching agent. The composition may be in the form of beads or lozenges which may be molded into tablets from a liquid melt. The composition may be an extruded product.

[0038] The composition may be in the form of unit-dose articles such as tablets, pouches, sheets, or textile articles. Such pouches typically contain a water-soluble film, such as a polyvinyl alcohol water-soluble film, that at least partially encapsulates the composition. Suitable films are available from MonoSol, LLC (Indiana, USA). The composition can be encapsulated in single-compartment pouches or multi-compartment pouches. Multi-compartment pouches may have at least two, at least three, or at least four compartments. Multi-compartment pouches may include compartments arranged side by side and / or overlapping. The composition contained in the pouch or its compartments may be liquid, solid (such as powder), or a combination thereof. The encapsulated composition may contain a relatively small amount of water, for example, less than about 20% by weight, or less than about 15% by weight, or less than about 12% by weight, or less than about 10% by weight, or less than about 8% by weight of the detergent composition.

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

[0040] The composition is 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] Additional components and / or features of compositions such as delivery particles and consumer product auxiliary materials will be discussed in more detail below.

[0042] A collection of delivery particles The consumer product compositions of this disclosure include a collection of delivery particles.

[0043] The composition may contain delivery particles in an amount of about 0.05% to about 20% by weight, 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 of the composition. The composition may contain an amount of delivery particles sufficient to provide the composition with an encapsulated beneficial agent 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, the beneficial agent may preferably be a fragrance ingredient. Where the amount or weight percentage of delivery particles is discussed herein, it means the total of the wall material and the core material.

[0044] The delivery particles typically comprise a core and a polymer wall, with the polymer wall surrounding the core. As described in more detail below, the core may comprise beneficial agents and optionally, a distribution modifier, and the shell may comprise a (meth)acrylate polymer that can be at least partially derived from a wall monomer and at least one free radical initiator.

[0045] The delivered particles may feature a volume-weighted median particle size of about 10 to about 100 microns, 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. The particle size is determined according to the procedure provided in the following chapter on test methods.

[0046] The delivery particle population may be characterized by one or more of the following: (i) 5th percentile volume-weighted particle size of approximately 1 micron to approximately 15 microns, (ii) 50th percentile (median) volume-weighted particle size of approximately 30 microns to approximately 50 microns, (iii) 90th percentile volume-weighted particle size of approximately 40 microns to approximately 80 microns, or (iv) a combination thereof.

[0047] The delivered particles may be characterized by their fracture strength. The fracture strength is determined according to the procedure provided in the following chapter on test methods. The population of delivered particles is subjected to an average fracture strength of approximately 0.2 MPa to approximately 30 MPa, or approximately 0.4 MPa to approximately 10 MPa, or approximately 0.6 MPa to approximately 5 MPa, or even approximately 0.8 MPa to approximately 4 MPa (the fracture strength is the median of the population / d). 50The delivery particle population may be characterized by a diameter (measured across several capsules). The delivery particle population may be characterized by an average fracture strength of about 0.2 MPa to about 10 MPa, or about 0.5 MPa to about 8 MPa, or about 0.5 MPa to about 6 MPa, or about 0.5 MPa to about 5 MPa, or about 0.7 MPa to about 4 MPa, or about 1 MPa to about 3 MPa. The delivery particle population may be characterized by an average fracture strength of about 0.2 MPa to about 10 MPa, preferably about 0.5 MPa to about 8 MPa, more preferably about 0.5 MPa to about 5 MPa. These concentrations d 50 Delivery particles having an average fracture strength of are expected to function well at one or more typical touchpoints on a surface such as a fabric treated with the composition of this disclosure.

[0048] As will be described in more detail below, the delivery particles of this disclosure comprise a core and a polymer wall surrounding the core. Delivery particles having a high core-to-wall ratio can deliver beneficial agents more efficiently and require less wall material to deliver the same amount of beneficial agent. Furthermore, since the delivery particles have a relatively high filler amount of beneficial agent, less delivery particle material may be required for a particular composition, saving costs and / or freeing up formulation space.

[0049] The delivery particles of this disclosure may be characterized by a core-to-polymer wall weight ratio (and, as used herein, “core:polymer wall ratio”, “core-wall ratio”, “core:wall ratio”, or even “C:W ratio”). Relatively high core:wall ratios are typically preferred to increase particle delivery efficiency or relative payload. However, if this ratio is too high, the capsule may become too brittle or prone to leakage, potentially providing suboptimal performance.

[0050] When used herein, the core:wall ratio is understood to be calculated based on the weight of the reacted wall monomers and initiators constituting the polymer wall, and for the purposes of the calculation, captured non-structural materials such as captured emulsifiers are excluded from the calculation. The calculation is based on the amount of starting inputs, i.e., input monomers and initiators. The calculation of a sample core:wall polymer ratio is illustrated in Example 1 below. If the amount of starting inputs is not readily available, the core:wall ratio is determined according to the analytical determination of the core:wall ratio procedure provided in the chapter on test methods.

[0051] The delivery particles, preferably a group of delivery particles, may feature a core-to-polymer wall weight ratio of at least about 95:5, preferably at least about 96:4, more preferably at least about 97:3, even more preferably at least about 98:2, and even more preferably at least about 99:1. The delivery particles, preferably a group of delivery particles, may feature a core-to-polymer wall weight ratio of about 95:5 to about 99.5:0.5, preferably about 96:4 to about 99.5:0.5, more preferably about 96:4 to about 99:1, more preferably about 97:3 to about 99:1, and even more preferably about 98:2 to about 99:1. The core-to-polymer wall weight ratio may preferably be about 95:5 to about 99.5:0.5, more preferably about 96:4 to about 99:1, more preferably about 97:3 to about 99:1, and even more preferably about 97:3 to about 98:2. As described above, such ratios attempt to balance filling efficiency with particle performance or characteristics (e.g., low leakage and / or sufficient fracture strength).

[0052] The components and processes related to the delivery particles of this disclosure are described in more detail below.

[0053] A. Polymer wall The delivery particles of this disclosure include a polymer wall surrounding a core. Note that, as used herein, the terms “polymer wall,” “wall,” and “shell” are interchangeable unless otherwise indicated.

[0054] The polymer wall comprises a polymer material, specifically a (meth)acrylate polymer. The (meth)acrylate polymer can be at least partially derived from a wall monomer and at least one free radical initiator.

[0055] 1. Wall monomer The wall monomer may contain at least 50% by weight of (meth)acrylate monomer. As described in more detail above, the term “(meth)acrylate monomer” is intended to include both acrylate monomer and methacrylate monomer. The wall monomer may contain at least 60% by weight, preferably at least 70% by weight, preferably at least 80% by weight, more preferably at least 90% by weight, and even more preferably at least 95% by weight of (meth)acrylate monomer. A relatively large amount of (meth)acrylate monomer may result in a desirable poly(meth)acrylate wall material having desirable properties.

[0056] (Meth)acrylate monomers may be oil-soluble or oil-dispersible. Being oil-soluble or oil-dispersible facilitates the encapsulation process, especially when the beneficial agent is also oil-soluble or oil-dispersible, such as a fragrance oil. (Meth)acrylate monomers may be oil-soluble or oil-dispersible polyfunctional (meth)acrylate monomers.

[0057] (Meth)acrylate monomers can be polyfunctional (meth)acrylate monomers. Polyfunctional (meth)acrylate monomers may preferably have at least three radical polymerizable functional groups, wherein at least one, more preferably at least two, more preferably at least three, preferably at least four, preferably at least five, preferably at least six, and more preferably exactly six of the radical polymerizable groups are acrylates or methacrylates. Polyfunctional (meth)acrylate monomers may contain at least three, preferably at least four, preferably at least five, preferably at least six, and more preferably exactly six radical polymerizable functional groups, wherein at least one of the radical polymerizable functional groups is an acrylate or methacrylate group. One or more polyfunctional (meth)acrylate monomers or oligomers may contain 3 to 6, preferably 4 to 6, more preferably 5 to 6, and most preferably 6 radical polymerizable functional groups. Monomers containing a relatively large number of radical polymerizable groups are thought to result in delivery particles with more compact walls and desirable properties such as less leakage, compared to walls formed from monomers with fewer radical polymerizable groups.

[0058] The radical polymerizable functional groups may be independently selected from the group consisting of acrylate, methacrylate, styrene, allyl, vinyl, glycidyl, ether, epoxy, carboxyl, or hydroxyl, provided that at least one of the radical polymerizable groups is acrylate or methacrylate. Preferably, at least two, at least three, at least four, at least five, or at least six of the radical polymerizable functional groups are acrylate or methacrylate groups. Preferably, each of the radical polymerizable functional groups is independently selected from the group consisting of acrylate and methacrylate. These functional groups are thought to result in delivery particles with desirable properties such as a high core-to-wall ratio and less leakage compared to other functional groups.

[0059] The (meth)acrylate monomer may include a polyfunctional aromatic urethane acrylate or a polyfunctional urethane acrylate ester. Preferably, the polyfunctional (meth)acrylate monomer includes a hexafunctional aromatic urethane acrylate or a hexafunctional urethane acrylate ester.

[0060] In addition or alternatively, the polyfunctional (meth)acrylate monomer may include polyfunctional aliphatic urethane acrylates.

[0061] The (meth)acrylate polymer of the polymer wall may be derived from at least two different polyfunctional (meth)acrylate monomers, for example, a first and a second polyfunctional (meth)acrylate monomer, each of which may preferably be oil-soluble or oil-dispersible. The first polyfunctional (meth)acrylate monomer may contain a different number of radical polymerizable functional groups compared to the second polyfunctional (meth)acrylate monomer. For example, the first polyfunctional (meth)acrylate monomer may contain six radical polymerizable functional groups (e.g., hexafunctional), and the second polyfunctional (meth)acrylate monomer may contain fewer than six radical polymerizable functional groups, such as a number selected from three (e.g., trifunctional), four (e.g., tetrafunctional), or five (e.g., pentafunctional), preferably five. The first and second polyfunctional (meth)acrylate monomers may contain the same number of radically polymerizable functional groups, such as six (for example, both monomers may be hexafunctional), but each monomer may be characterized by a different structure or chemistry.

[0062] (meth)acrylate monomers are amines ( Meta )a Crylate, acidic ( Meta )a It may further contain monomers selected from acrylates or combinations thereof.

[0063] The (meth)acrylate polymer of the polymer wall may be a reaction product derived from a polyfunctional (meth)acrylate (preferably oil-soluble or oil-dispersible), a second monomer, and a third monomer. Preferably, the second monomer includes a basic (meth)acrylate monomer, and the third monomer includes an acidic (meth)acrylate monomer. The basic (meth)acrylate monomer may be present in less than 2% by weight of the wall polymer. The acidic (meth)acrylate monomer may be present in less than 2% by weight of the wall polymer.

[0064] The basic (meth)acrylate monomer may contain one or more monomers such as amine-modified methacrylate, amine-modified acrylate, mono- or diacrylate amine, mono- or dimethacrylate amine, amine-modified polyether acrylate, amine-modified polyether methacrylate, aminoalkyl acrylate, or aminoalkyl methacrylate. The amine may be a primary, secondary, or tertiary amine. Preferably, the alkyl portion of the basic (meth)acrylate monomer is C1 to C12.

[0065] Suitable amine (meth)acrylates for use in the particles of this disclosure include, but are not limited to, aminoalkyl acrylates and / or aminoalkyl methacrylates, including, for example, ethylaminoethyl acrylate, ethylaminoethyl methacrylate, aminoethyl acrylate, aminoethyl methacrylate, tertiary butylethylamino acrylate, tertiary butylaminoethyl acrylate, tertiary butylaminoethyl methacrylate, diethylamino acrylate, diethylaminoethyl acrylate, diethylaminoethyl methacrylate, dimethylaminoethyl acrylate, and dimethylaminoethyl methacrylate. Preferably, the amine (meth)acrylate is aminoethyl acrylate, aminoethyl methacrylate, or tertiary butylaminoethyl methacrylate.

[0066] The acidic (meth)acrylate may, as an example, include one or more carboxy-substituted acrylates or methacrylates, preferably including carboxy-substituted alkyl acrylates or methacrylates such as carboxyalkyl acrylate, carboxyalkyl methacrylate, carboxyaryl acrylate, and carboxyaryl methacrylate, and preferably the alkyl portion is a linear or branched C1-C10 chain. The carboxyl portion can be bonded to any carbon, preferably a terminal carbon, of the C1-C10 alkyl portion. Carboxy-substituted aryl acrylates or methacrylates can also be used, or even (meth)acryloyloxyphenylalkylcarboxylates can be used. The alkyl portion of (meth)acryloyloxyphenylalkylcarboxylates can be C1-C10.

[0067] Suitable carboxy(meth)acrylates for use in the particles of this disclosure include 2-carboxyethyl acrylate, 2-carboxyethyl methacrylate, 2-carboxypropyl acrylate, 2-carboxypropyl methacrylate, carboxyoctyl acrylate, and carboxyoctyl methacrylate. Suitable carboxysubstituted aryl acrylates or methacrylates include 2-acryloyloxybenzoic acid, 3-acryloyloxybenzoic acid, 4-acryloyloxybenzoic acid, 2-methacryloyloxybenzoic acid, 3-methacryloyloxybenzoic acid, and 4-methacryloyloxybenzoic acid. Suitable (meth)acryloyloxyphenylalkylcarboxylates include, but are not limited to, 4-acryloyloxyphenylacetic acid or 4-methacryloyloxyphenylacetic acid, which are merely examples.

[0068] If the polymer wall is at least partially derived from an oil-soluble or oil-dispersible (meth)acrylate monomer, it may also be derived from a water-soluble or water-dispersible monofunctional or polyfunctional (meth)acrylate monomer that may contain hydrophilic functional groups. The water-soluble or water-dispersible monofunctional or polyfunctional (meth)acrylate monomer may be preferably selected from the group consisting of amine (meth)acrylates, acidic (meth)acrylates, polyethylene glycol di(meth)acrylates, ethoxylated monofunctional (meth)acrylates, ethoxylated polyfunctional (meth)acrylates, other (meth)acrylate monomers, other (meth)acrylate oligomers, and mixtures thereof.

[0069] 2. Free radical initiators The (meth)acrylate polymer of the polymer wall can be derived from a wall monomer and at least one free radical initiator. One or more free radical initiators can provide a free radical source during activation, thereby facilitating polymerization and forming the wall polymer.

[0070] As described above, surprisingly, it has been found that by selecting a specific amount of free radical initiator in delivery particles with a high core-to-wall weight ratio, remarkably improved performance can be provided, for example, with respect to leakage and / or fracture strength. The relative amount of free radical initiator is particularly important in particles with a high core-to-wall weight ratio, which is thought to be due to the very low relative amount of wall monomer.

[0071] At least one free radical initiator in the polymer wall of the present disclosure may be present at a concentration of about 15% to about 60% by weight of the polymer wall. At least one free radical initiator may be present at a concentration of about 20% to about 60% by weight of the polymer wall, preferably about 20% to about 50% by weight, more preferably about 20% to about 45% by weight, and even more preferably about 20% to about 35% by weight.

[0072] A wall monomer, preferably a (meth)acrylate monomer, and at least one free radical initiator may be used in a free radical polymerization reaction in a weight ratio of about 85:15 to about 40:60, preferably about 80:20 to about 40:60, more preferably about 80:20 to about 50:50, even more preferably about 80:20 to about 55:45, and even more preferably about 80:20 to about 65:35.

[0073] The (meth)acrylate polymer of the polymer wall can preferably be derived from at least two free radical initiators. The (meth)acrylate polymer can be derived from a first free radical initiator and a second free radical initiator. The first free radical initiator and the second free radical initiator may be present in a weight ratio of about 5:1 to about 1:5, or preferably about 3:1 to about 1:3, or more preferably about 2:1 to about 1:2, or even more preferably about 1.5:1 to about 1:1.5.

[0074] At least one free radical initiator may include an oil-soluble or oil-dispersible free radical initiator. At least one free radical initiator may include a water-soluble or water-dispersible free radical initiator. At least one free radical initiator may include an oil-soluble or oil-dispersible free radical initiator (e.g., as a first free radical initiator) and a water-soluble or water-dispersible free radical initiator (e.g., as a second free radical initiator).

[0075] Suitable free radical initiators include peroxy initiators, azo initiators, or mixtures thereof. More specifically, but not limited to, free radical initiators include peroxides, dialkylperoxides, alkylperoxides, peroxyesters, peroxycarbonates, peroxyketones, peroxydicarbonates, 2,2'-azobis(isobutylnitrile), 2,2'-azobis(2,4-dimethylpentanenitrile), 2,2'-azobis(2,4-dimethylvaleronitrile), 2,2'-azobis(2-methylpropanenitrile), 2,2'-azobis(2-methylbutyl (Ronitrile), 1,1'-Azobis(cyclohexanecarbonile), 1,1'-Azobis(cyanocyclohexane), Benzoyl peroxide, Decanoyl peroxide, Lauroyl peroxide, Di(n-propyl)peroxydicarbonate, Di(sec-butyl)peroxydicarbonate, Di-(2-ethylhexyl)peroxydicarbonate, 1,1-Dimethyl-3-hydroxybutylperoxyneodecanoate, α-Cumylperoxyneoheptanoate, t-Amylperoxyne Decanoate, t-butylperoxyneodecanoate, t-amylperoxypivalate, t-butylperoxypivalate, 2,5-dimethyl-2,5-di(2-ethylhexanoylperoxy)hexane, t-amylperoxy-2-ethyl-hexanoate, t-butylperoxy-2-ethylhexanoate, t-butylperoxyacetate, di-t-amylperoxyacetate, t-butylperoxide, di-t-amylperoxide, 2,5-dimethyl-2,5-di-(t-butylper The following can be selected from the group consisting of oxy)hexine-3, cumene hydroperoxide, 1,1-di-(t-butylperoxy)-3,3,5-trimethylcyclohexane, 1,1-di-(t-butylperoxy)-cyclohexane, 1,1-di-(t-amylperoxy)-cyclohexane, ethyl-3,3-di-(t-butylperoxy)-butyrate, t-amylperbenzoate, t-butylperbenzoate, ethyl-3,3-di-(t-amylperoxy)-butyrate, and combinations thereof.

[0076] Preferred free radical initiators include 4,4'-azobis(4-cyanovaleric acid), 1,1'-azobis(cyclohexanecarbonile), 2,2'-azobis(2-methylbutyronitrile), or combinations thereof.

[0077] 3. Other materials Other materials may be present within or on the polymer wall. For example, the polymer wall may include emulsifiers, coatings, or a combination thereof.

[0078] The polymer wall may contain an emulsifier as a result of the particle production process. When producing delivery particles, the emulsifier may optionally be included, preferably in the aqueous phase. The emulsifier may be a polymer emulsifier. The emulsifier may help to further stabilize the emulsion during the particle production process. In the formation of the polymer wall of the delivery particle, the polymer emulsifier may be trapped within the polymer wall material. These inclusions of the emulsifier in the polymer wall may be usefully used to help modify the polymer wall properties, affecting attributes such as flexibility, leakage, strength, and other properties. Therefore, the polymer wall of the delivery particle may further contain a polymer emulsifier trapped in the polymer wall, preferably the polymer emulsifier contains polyvinyl alcohol. However, as shown above, when determining the core:wall polymer weight ratio, the trapped polymer emulsifier is not included.

[0079] The beneficial agent delivery particles may contain about 0.5% to about 40%, preferably about 0.5% to about 20%, more preferably 0.8% to 5%, of emulsifier based on the weight of the wall material. Preferably, the emulsifier is selected from the group consisting of polyvinyl alcohol, carboxylated or partially hydrolyzed polyvinyl alcohol, methylcellulose, hydroxyethylcellulose, carboxymethylcellulose, methylhydroxypropylcellulose, salts or esters of stearic acid, lecithin, organic sulfonic acid, 2-acrylamido-2-alkylsulfonic acid, styrenesulfonic acid, polyvinylpyrrolidone, N-vinylpyrrolidone copolymer, polyacrylic acid, polymethacrylic acid, copolymer of acrylic acid and methacrylic acid, and water-soluble surfactant polymers that reduce the surface tension of water.

[0080] The emulsifier preferably contains polyvinyl alcohol, which preferably has a degree of hydrolysis of about 55% to about 99%, preferably about 75% to about 95%, more preferably about 85% to about 90%, and most preferably about 87% to about 89%. The polyvinyl alcohol may have a viscosity of about 40 cps to about 80 cps, preferably about 45 cps to about 72 cps, more preferably about 45 cps to about 60 cps, and most preferably 45 cps to about 55 cps in a 4% aqueous solution of polyvinyl alcohol at 20°C. The viscosity of the polymer is determined by measuring the newly prepared solution using a Brookfield LV viscometer with a UL adapter, as described in British Standard EN ISO15023-2:2006 Annex E Brookfield Test method. Polyvinyl alcohol may have a degree of polymerization of about 1500 to about 2500, preferably about 1600 to about 2200, more preferably about 1600 to about 1900, and most preferably about 1600 to about 1800. The weight-average molecular weight of polyvinyl alcohol may be about 130,000 daltons to about 204,000 daltons, preferably about 146,000 daltons to about 186,000 daltons, more preferably about 146,000 daltons to about 160,000 daltons, most preferably about 146,000 daltons to about 155,000 daltons, and / or the number-average molecular weight of about 65,000 daltons to about 110,000 daltons, preferably about 70,000 daltons to about 101,000 daltons, more preferably about 70,000 daltons to about 90,000 daltons, most preferably about 70,000 daltons to about 80,000 daltons.

[0081] The walls of the delivery particles may include a coating on the outer surface of the wall, for example, away from the core. The inclusion body may be manufactured and then subsequently coated with a coating material. The coating may be useful as an adhesion aid. The coating may include cationic materials such as cationic polymers. However, as shown above, coatings that are not structural or support features of the wall are not included in the calculations when determining the core:wall polymer weight ratio.

[0082] Non-limiting examples of coating materials include poly(meth)acrylate, poly(ethylene-maleic anhydride), polyamine, wax, polyvinylpyrrolidone, polyvinylpyrrolidone copolymer, polyvinylpyrrolidone-ethyl acrylate, polyvinylpyrrolidone-vinyl acrylate, polyvinylpyrrolidone methacrylate, polyvinylpyrrolidone / vinyl acetate, polyvinyl acetal, polyvinyl butyral, polysiloxane, poly(propylene-maleic anhydride), maleic anhydride derivatives, maleic anhydride derivative copolymers, polyvinyl alcohol, styrene-butadiene latex, gelatin, gum arabic, carboxymethylcellulose, carboxymethyl hydroxyethylcellulose, and hydroxycellulose. Examples of materials selected from the group consisting of ethylcellulose, other modified celluloses, sodium alginate, chitosan, casein, pectin, modified starch, polyvinyl acetal, polyvinyl butyral, polyvinyl methyl ether / maleic anhydride, polyvinylpyrrolidone and its copolymers, poly(vinylpyrrolidone / methacrylamidopropyltrimethylammonium chloride), polyvinylpyrrolidone / vinyl acetate, polyvinylpyrrolidone / dimethylaminoethyl methacrylate, polyvinylamine, polyvinylformamide, polyallylamine, and copolymers of polyvinylamine, polyvinylformamide, and polyallylamine, as well as mixtures thereof, include, but are not limited to, materials selected from the group consisting of these. The coating material may also be a cationic polymer. The coating material may contain polyvinylformamide, chitosan, or a combination thereof, preferably chitosan.

[0083] B. Core Materials The delivery particles of this disclosure include a core. The core includes a beneficial agent. The core optionally includes a distribution modifier.

[0084] The particle's core is surrounded by a polymer wall. When the polymer wall ruptures, the beneficial agent inside the core is released.

[0085] 1. Beneficial agents Suitable beneficial agents to be placed within the core include beneficial agents that provide benefits to surfaces such as fabrics or hair.

[0086] The core may contain a beneficial agent in an amount of about 5% to about 100% by weight of the core, and the beneficial agent may preferably include a fragrance. The core may contain a beneficial agent 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, and the beneficial agent may preferably include a fragrance.

[0087] The beneficial agents may include aldehyde-containing beneficial agents, ketone-containing beneficial agents, or combinations thereof. Such beneficial agents, such as aldehyde or ketone-containing fragrance raw materials, are known to provide desirable benefits, such as a fresh-wash feeling. However, as mentioned above, these agents may also interfere with wall formation during the particle formation process. Therefore, in the presence of such materials, it is particularly advantageous to form the delivered particles at the initiator concentrations described herein in order to obtain a favorable performance profile.

[0088] The beneficial agent may comprise 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.

[0089] The beneficial agent may be a hydrophobic beneficial agent. Such agents are compatible with the oil phase, which is common when preparing the delivery particles of this disclosure.

[0090] 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 fabric refreshing agents and fresh-wash feeling maintaining agents, chlorine bleach odor suppressants, 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 protection agents, sun-fading inhibitors, anti-allergic agents, enzymes, waterproofing agents, fabric comfort agents, shrinkage-resistant agents, stretch-resistant agents, stretch-recovery agents, skin care agents, glycerin, synthetic or natural active substances, antibacterial active substances, antiperspirant active substances, cationic polymers, dyes, and mixtures thereof.

[0091] The encapsulated beneficial agent may preferably contain a fragrance, which may contain one or more fragrance ingredients. Fragrances are particularly suitable for encapsulation in the delivery particles described herein because the fragrance-containing particles can provide the benefit of a fresh feeling across multiple touchpoints.

[0092] As used herein, the term “perfume raw material” (or “PRM” for short) refers to a compound having a molecular weight of at least about 100 g / mol that is useful for imparting odor, fragrance, essence, or scent, either alone or in combination with other perfume raw materials. Typical PRMs include, in particular, alcohols, ketones, aldehydes, esters, ethers, nitrides, and alkenes, such as terpenes. A general list of PRMs can be found in various references, such as “Perfume and Flavor Chemicals,” Vols. 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).

[0093] 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, PRM may be classified as quadrant I, quadrant II, quadrant III, or quadrant IV fragrances, as will be described in more detail below.

[0094] The fragrance may contain fragrance ingredients with a logP of approximately 2.5 to 4. It is understood that other fragrance ingredients may also be present in the fragrance.

[0095] 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. It is preferable that Quadrant I fragrance raw materials be limited to less than 30% of the fragrance composition. Fragrance raw materials having a BP higher than about 250°C and a logP higher than about 3 are known as Quadrant IV fragrance raw materials, fragrance raw materials having a BP higher than about 250°C and a logP lower than about 3 are known as Quadrant II fragrance raw materials, and fragrance raw materials having a BP lower than about 250°C and a logP higher than about 3 are known as Quadrant III fragrance raw materials. Preferred quadrant I, II, III, and IV fragrance ingredients are disclosed in U.S. Patent No. 6,869,923(B1).

[0096] A consumer product composition according to any one of the prior claims, wherein the beneficial agent comprises a fragrance, preferably the fragrance 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, of the fragrance.

[0097] Preferred aldehyde-containing fragrance ingredients include methyl nonylacetaldehyde, benzaldehyde, florarozone; isocyclocitral, tripral (ligstral), precyclemon B; lilial; decylaldehyde, undecylenaldehyde, cyclamen homoaldehyde, cyclamenaldehyde, dupical, onsidal, adxal; melonal; calypsone; anisaldehyde, heliotropin; cuminaldehyde, centenal; 3,6-dimethylcyclohexa-3-ene-1-carbaldehyde, satenealdehyde, and kan. Examples include toxal; vanillin, ethyl vanillin, cinnamaldehyde; cis-4-decenal, trans-4-decenal, cis-7-decenal, undecylenaldehyde, trans-2-hexenal; trans-2-octenal, 2-undecenal, 2,4-dodecadienal, cis-4-heptenal, fluorhydral, butylcinnamaldehyde, limonellal, amylcinnamaldehyde, hexylcinnamaldehyde, citronellal; citral; cis-3-hexen-1-al, or mixtures thereof.

[0098] Preferred ketone-containing raw materials include nerolion, 4-(4-methoxyphenyl)butan-2-one; 1-naphthalene-2-yleuthanone, nectaril, trimofix "O", fluramon, δ-damascone, β-damascone, α-damascone, methylionone, 2-hexylcyclopenta-2-en-1-one; galabascone, or mixtures thereof.

[0099] 2. Distribution regulator The core of the delivery particles of this disclosure may include a distribution modifier. The properties of the oily material in the core may play a role in determining how much, how quickly, and / or how permeable the polyacrylate shell material is when established at the oil / water interface. For example, if the oil phase contains highly polar materials, these materials may reduce the diffusion of acrylate oligomers and polymers to the oil / water interface, resulting in a very thin, highly permeable shell. Incorporation of a distribution modifier can adjust the polarity of the core, thereby changing the distribution coefficient of the polar material in the distribution modifier to the acrylate oligomer, resulting in the establishment of a distinct, highly impermeable shell. The distribution modifier may be combined with the oily material of the core before the incorporation of the wall-forming monomers.

[0100] The distribution 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.

[0101] The distribution regulators are 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 more precisely, 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. 2011 / 0268802, incorporated herein by reference, describes other distribution modifiers that may be useful in the delivery particles described herein.

[0102] C. Method for producing delivery particles The delivery particles can be prepared by known methods, provided that the initiator concentrations and core-to-shell ratios described herein are observed. The methods may be further modified to achieve other desirable characteristics described herein, such as volume-weighted particle size, relative amounts of beneficial agents and / or distribution modifiers.

[0103] For example, the present disclosure relates to a process for producing a collection of delivery particles comprising a core and a polymer wall enclosing the core. The process may include a step of providing an oil phase. The oil phase may include the beneficial agents and partition modifiers described above. The process may further include dissolving or dispersing in the oil phase one or more oil-soluble or oil-dispersible polyfunctional (meth)acrylate monomers having at least three, preferably at least four, at least five, or even at least six radical polymerizable functional groups, wherein at least one of the radical polymerizable groups is an acrylate or methacrylate.

[0104] Oil-soluble or dispersible polyfunctional (meth)acrylate monomers are described in more detail above. In particular, oil-soluble or dispersible polyfunctional (meth)acrylate monomers may include polyfunctional aromatic urethane acrylates, preferably trifunctional, tetrafunctional, pentafunctional, or hexafunctional aromatic urethane acrylates, or mixtures thereof, preferably including hexafunctional aromatic urethane acrylates. The monomer may include one or more polyfunctional aliphatic urethane acrylates that can be dissolved or dispersed in the oil phase. The process may further include dissolving or dispersing one or more amine (meth)acrylates or acidic (meth)acrylates in the oil phase.

[0105] The process may further include providing an aqueous phase which may contain an emulsifier, a surfactant, or a combination thereof. The process may further include dissolving or dispersing one or more water-soluble or water-dispersible monofunctional or polyfunctional (meth)acrylate monomers and / or oligomers in the aqueous phase.

[0106] The process may include dissolving or dispersing one or more amine (meth)acrylates, acidic (meth)acrylates, polyethylene glycol di(meth)acrylates, ethoxylated monofunctional or polyfunctional (meth)acrylates, and / or other (meth)acrylate monomers in an aqueous phase, an oil phase, or both.

[0107] Generally, oil-soluble polyfunctional (meth)acrylate monomers are soluble or dispersible in the oil phase, typically soluble in 100 ml of oil up to about 1 gram, or dispersible or emulsifiable in 22C. Water-soluble polyfunctional (meth)acrylate monomers are typically soluble or dispersible in water, typically soluble in 100 ml of water up to about 1 gram, or dispersible in 22C.

[0108] Typically, the oil phase is mixed with an excess of the aqueous phase. When two or more oil phases are used, they are generally mixed first and then combined with the aqueous phase. If desired, the aqueous phase may also contain one or more aqueous phases that are sequentially combined.

[0109] The oil phase can be emulsified in the aqueous phase under high shear agitation to form an oil-in-water emulsion that may contain droplets of core material dispersed in the aqueous phase. Typically, the amount of shear agitation applied can be controlled to form droplets of a target size, which affects the final size of the completed inclusion.

[0110] Dissolved or dispersed monomers can be reacted by heating or irradiating the emulsion with light. The reaction can form a polymer wall at the interface between the droplet and the aqueous phase. The radical polymerizable groups of the polyfunctional methacrylate facilitate the self-polymerization of the polyfunctional methacrylate upon heating.

[0111] One or more free radical initiators are provided in the oil phase, the aqueous phase, or both, preferably both. For example, the process may include adding one or more free radical initiators to the aqueous phase to provide a further source of free radicals during thermal activation, for example. The process may include adding one or more free radical initiators to the oil phase. One or more free radical initiators may be added to the aqueous phase, the oil phase, or both in an amount greater than 0% to about 5% by weight of each phase. Free radical initiators may be added in an amount that achieves a concentration in the polymer wall such that at least one free radical initiator is present at a concentration of about 15% to about 60% by weight of the polymer wall. At least one free radical initiator may be added so that it is present at a concentration of about 20% to about 60% by weight of the polymer wall, preferably about 20% to about 50%, more preferably about 20% to about 45%, and even more preferably about 20% to about 35% by weight of the polymer wall.

[0112] In the case of latent initiators, a first action, particularly a chemical reaction, is also intended to be required to convert the latent initiator into an active initiator, after which polymerization is initiated when the active initiator is exposed to polymerization conditions. When multiple initiators are present, it is intended and preferred that each initiator be initiated by different conditions, or preferably initiated in a particular manner.

[0113] In the described process, the heating step may include heating the emulsion for about 1 to 20 hours, preferably about 2 to 15 hours, more preferably about 4 to 10 hours, and most preferably about 5 to 7 hours, to such an extent that it is heated sufficiently to deliver about 500 joules / kg to about 5000 joules / kg to the emulsion, about 1000 joules / kg to about 4500 joules / kg to the emulsion, and about 2900 joules / kg to about 4000 joules / kg to the emulsion.

[0114] Prior to the heating step, the emulsion may feature a volume-weighted median particle size of emulsion droplets of approximately 0.5 to 100 microns, more precisely 1 to 60 microns, or even 20 to 50 microns, preferably 30 to 50 microns, for the purpose of forming a collection of delivery particles having a volume-weighted target diameter of approximately 30 to 50 microns.

[0115] The beneficial agent may be selected as described above, and is preferably a fragrance containing one or more fragrance ingredients. The beneficial agent may be the main component, or even the sole component, of the oil phase in which the other materials are dissolved or dispersed.

[0116] The distribution modifier may be selected from the group consisting of isopropyl myristate, vegetable oil, modified vegetable oil, mono-, di-, and tri-esters of C4-C24 fatty acids, dodecanophenone, lauryl laurate, methyl behenate, methyl laurate, methyl palmitate, methyl stearate, and mixtures thereof, preferably isopropyl myristate. The distribution modifier may be provided in an amount that constitutes about 5% to about 55% by weight of the core of the delivery particles.

[0117] The resulting delivery particles are preferably characterized by the core-to-wall ratio and / or particle size described above, as such characteristics have been found to yield advantageous performance.

[0118] For example, the present disclosure relates to a consumer product composition comprising a processing aid and a group of delivery particles, wherein the delivery particles comprise a core and a polymer wall surrounding the core, and the delivery particles provide an oil phase comprising a beneficial agent, wherein the oil phase preferably further comprises a partition modifier; dissolve or disperse one or more oil-soluble or oil-dispersible wall monomers in the oil phase, wherein the wall monomer comprises at least 50% by weight of (meth)acrylate monomers of the wall monomer, preferably at least 3, preferably at least 4, at least 5, or even more preferably at least 6 radical polymerizable functional groups, wherein at least one of the radical polymerizable groups is acrylate or methacrylate; and dissolve or disperse at least one free radical initiator (e.g., a first The present invention relates to a consumer product composition that can be obtained by a process comprising: providing a free radical initiator; providing an aqueous phase comprising an emulsifier or surfactant and optionally at least one other free radical initiator (e.g., a second free radical initiator); emulsifying an oil phase into an aqueous phase under high shear stirring to form an oil-in-water emulsion comprising droplets of the oil phase dispersed in the aqueous phase; and reacting dissolved or dispersed monomers by heating or chemical irradiation of the emulsion to form a polymer wall at the interface between the droplets and the aqueous phase, thereby yielding delivery particles having a core surrounded by a polymer wall, wherein one or more free radical initiators constitute about 15% to 60% by weight of the polymer wall, and the core and polymer wall are present in a weight ratio of about 95:5 to about 99.5:0.5.

[0119] The process for obtaining delivered particles may include a further step of adding one or more free radical initiators to the aqueous phase to provide an additional source of free radicals during thermal activation.

[0120] The process for obtaining delivery particles may include a further step of dissolving or dispersing one or more monofunctional or polyfunctional (meth)acrylate monomers and / or oligomers in an aqueous phase. The polyfunctional (meth)acrylate monomer having a radically polymerizable functional group may be a polyfunctional aromatic urethane acrylate. The polyfunctional (meth)acrylate monomer having a radically polymerizable functional group may be a trifunctional, tetrafunctional, pentafunctional, or hexafunctional aromatic urethane acrylate.

[0121] The step of dissolving or dispersing in an oil phase may further include dissolving or dispersing one or more polyfunctional aliphatic urethane acrylates in one or more oil phases.

[0122] The process for obtaining delivery particles may include a further step of dissolving or dispersing one or more amine methacrylates or acidic methacrylates.

[0123] The process for obtaining delivery particles may further include dissolving or dispersing one or more amine (meth)acrylates, acidic (meth)acrylates, polyethylene glycol di(meth)acrylates, ethoxylated monofunctional or polyfunctional (meth)acrylates, and / or (meth)acrylate monomers and / or oligomers in an aqueous phase, an oil phase, or both.

[0124] As a result of the method for producing the delivery particles provided herein, the delivery particles may be present in an aqueous slurry, for example, the particles may be present in the slurry at a concentration of about 20% to about 60% by weight, preferably about 30% to about 50% by weight. Additional materials such as preservatives, solvents, structuring agents, or other processing aids or stabilizing aids may be added to the slurry. The slurry may contain one or more fragrances (i.e., unencapsulated fragrances) that are different from the fragrances contained in the core of the beneficial agent delivery particles.

[0125] An exemplary synthesis method capable of forming the inclusion bodies according to this disclosure is further described in Example 1 below.

[0126] consumer product auxiliary materials The consumer product compositions of this disclosure include consumer product auxiliary materials in addition to a group of delivery particles. The consumer product auxiliary materials may provide benefits in the intended end use of the composition, or they may be processing aids and / or stabilizing aids.

[0127] Suitable consumer product auxiliary materials 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, clay and stain removers / anti-redeposition agents, whitening agents, foam inhibitors, silicones, colorants, aesthetic dyes, additional fragrances and fragrance delivery systems, structural elastochemicals, carriers, hydrotropes, processing aids, anti-aggregating agents, coatings, formaldehyde scavengers, and / or pigments.

[0128] Depending on the intended form, formulation, and / or end use, the compositions of this disclosure may not 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, coatings, formaldehyde scavengers, and / or pigments.

[0129] The exact properties of these additional components and the concentrations in which they are incorporated depend on the physical form of the composition and the nature of the work performed. 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.

[0130] 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.

[0131] 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.

[0132] The surfactant system may include anionic surfactants, nonionic surfactants, zwitterionic surfactants, cationic surfactants, amphoteric surfactants, or combinations thereof. The surfactant system may 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.

[0133] 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).

[0134] 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.

[0135] 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 other conventional zwitterionic surfactants such as sulfobetaines and hydroxybetaines. The zwitterionic surfactant may include amine oxide.

[0136] Depending on the formulation and / or intended end use, a composition may not substantially contain certain surfactants. For example, a liquid fabric softener or similar liquid fabric softener may not substantially contain anionic surfactants because such surfactants can negatively interact with cationic components.

[0137] 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.

[0138] 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 concentration of about 1% to about 2% to about 3% to about 99% by weight of the composition, or 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 concentration of about 5% to about 30% by weight of the composition of the conditioning active substance.

[0139] Suitable conditioning active substances for the compositions of this disclosure include quaternary ammonium ester compounds, silicones, non-esterified quat-ammonium compounds, amines, fatty acid esters, sucrose esters, silicones, dispersible polyolefins, polysaccharides, fatty acids, softening or conditioning oils, polymer latexes, or combinations thereof.

[0140] 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.

[0141] 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.

[0142] C. Adhesion aids The compositions of this disclosure may include adhesion aids. Adhesion aids may facilitate the adhesion of delivery particles, conditioning actives, fragrances, or combinations thereof, improve the performance effects of the composition, and / or enable a 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 composition, an adhesion aid. The adhesion aid may be a cationic or amphoteric polymer, preferably a cationic polymer.

[0143] 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).

[0144] 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.

[0145] Adhesion aids may be added to the consumer product 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.

[0146] 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 facilitate phase stability and / or to suspend particles in the liquid composition, such as delivery particles described herein, or to inhibit their aggregation.

[0147] 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.

[0148] 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 It may include copolymers with alkyl esters. 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.

[0149] Process for preparing a composition This disclosure relates to a process for producing any of the consumer product compositions described herein. The process for producing a consumer product composition may include a step of combining a delivery particle (or a group thereof) described herein with a consumer product auxiliary material described herein.

[0150] The delivery particles can be combined with one or more such consumer product auxiliary materials when the delivery particles are in one or more forms, including slurry form, undiluted delivery particle form, and spray-dried delivery particle form, preferably slurry form. The delivery particles can be combined with such consumer product auxiliary materials by methods including mixing and / or spraying.

[0151] The compositions of this disclosure can be formulated into any preferred form and can be compounded by any process selected by the compounder. The delivery particles and auxiliary materials may be combined in batch processes, recirculating loop processes, and / or in-line mixing processes. Suitable equipment for use in the processes disclosed herein includes continuous agitated tank reactors, homogenizers, turbine agitators, recirculating pumps, paddle mixers, high-shear mixers, static 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.

[0152] Methods for treating surfaces or articles This disclosure further relates to a method for treating a surface or article with a composition according to this disclosure. Such a method may provide benefits relating to cleaning, conditioning, and / or deodorization.

[0153] Suitable surfaces or articles include fabrics (including clothing, towels, or linens), hard surfaces (such as tiles, porcelain, linoleum, or wooden floors), tableware, hair, skin, or mixtures thereof.

[0154] The method may include a step of bringing a surface or article into contact with the composition of the Disclosure. The composition may be in its original form or diluted with a liquid, such as a cleaning solution or a rinsing solution. The composition may be diluted with water before, during, or after contact with the surface or article. The surface or article may optionally be washed and / or rinsed before and / or after the contact step.

[0155] Methods for treating and / or cleaning surfaces or articles are: a) Optionally, a step of washing, rinsing, and / or drying the surface or article, b) Optionally, a step of bringing a surface or article into contact with the composition described herein in the presence of water, c) Optionally, a step of washing and / or rinsing a surface or article, d) optionally includes a step of drying by passive drying and / or by an active method such as a washing machine or dryer.

[0156] With regard to the object of the present invention, washing includes, but is not limited to, scrubbing and mechanical agitation. The fabric may include almost any fabric that can be washed or treated under standard consumer use conditions.

[0157] Liquids containing the disclosed compositions may have a pH of about 3 to about 11.5. When diluted, such compositions are typically used in solution at concentrations of about 500 ppm to about 15,000 ppm. If the cleaning solvent is water, the water temperature is typically in the range of about 5°C to about 90°C, and if the area includes fabric, the water-to-fabric ratio is typically about 1:1 to about 30:1.

[0158] combination The specific combinations contemplated in this disclosure are described in the following alphabetically designated sections. These combinations are for illustrative purposes only and are not intended to limit the scope of this disclosure.

[0159] A. A consumer product composition comprising a group of delivery particles, wherein the delivery particles comprise a core and a polymer wall surrounding the core, the polymer wall comprises a (meth)acrylate polymer at least partially derived from a wall monomer and at least one free radical initiator, the wall monomer comprises at least 50% by weight of the (meth)acrylate monomer of the wall monomer, and at least one free radical initiator is present in a concentration of about 15% to about 60% by weight of the polymer wall, the core comprises a beneficial agent, and the core and the polymer wall are present in a weight ratio of about 95:5 to about 99.5:0.5, and the consumer product composition comprising a group of delivery particles and a consumer product auxiliary material. B. A consumer product composition comprising a consumer product processing aid and a group of delivery particles, wherein the delivery particles comprise a core and a polymer wall surrounding the core, and the delivery particles provide an oil phase comprising a beneficial agent, wherein the oil phase preferably further comprises a distribution regulator; dissolve or disperse one or more oil-soluble or oil-dispersible wall monomers in the oil phase, wherein the wall monomer comprises at least 50% by weight of (meth)acrylate monomers of the wall monomer, preferably at least 3, preferably at least 4, at least 5, or even more preferably at least 6 radical polymerizable functional groups, wherein at least one of the radical polymerizable groups is acrylate or methacrylate; and dissolve or disperse at least one free radical initiator (e.g., 1) in the oil phase. A consumer product composition that can be obtained by a process comprising: providing a free radical initiator; providing an aqueous phase comprising an emulsifier or surfactant and optionally at least one other free radical initiator (e.g., a second free radical initiator); emulsifying the oil phase into the aqueous phase under high shear stirring to form an oil-in-water emulsion comprising droplets of the oil phase dispersed in the aqueous phase; and reacting the dissolved or dispersed monomers by heating or chemical irradiation of the emulsion to form a polymer wall at the interface between the droplets and the aqueous phase, thereby yielding delivery particles having a core surrounded by a polymer wall, wherein one or more free radical initiators constitute about 15% to 60% by weight of the polymer wall, and the core and polymer wall are present in a weight ratio of about 95:5 to about 99.5:0.5. C. The consumer product composition according to either paragraph A or B, wherein the wall monomer comprises at least 60% by weight, preferably at least 70% by weight, preferably at least 80% by weight, more preferably at least 90% by weight, and even more preferably at least 95% by weight of (meth)acrylate monomer of the wall monomer. D. A consumer product composition according to any one of paragraphs A to C, wherein the (meth)acrylate monomer is oil-soluble or oil-dispersible. E. The consumer product composition according to any one of paragraphs A to D, wherein the (meth)acrylate monomer is preferably a polyfunctional (meth)acrylate monomer having at least three radical polymerizable functional groups, wherein at least one, more preferably at least three, of the radical polymerizable groups is acrylate or methacrylate. F. A consumer product composition according to any one of paragraphs A to E, wherein at least one free radical initiator comprises a first free radical initiator and a second free radical initiator, preferably the first free radical initiator and the second free radical initiator are present in a weight ratio of about 5:1 to about 1:5, or preferably about 3:1 to about 1:3, or more preferably about 2:1 to about 1:2, or even more preferably about 1.5:1 to about 1:1.5. G. A consumer product composition according to any one of paragraphs A to F, wherein at least one free radical initiator comprises a water-soluble or water-dispersible free radical initiator, preferably a water-soluble or water-dispersible free radical initiator and an oil-soluble or oil-dispersible free radical initiator. H. At least one free radical initiator is a material selected from the group consisting of peroxy initiators, azo initiators, and combinations thereof, preferably peroxides, dialkylperoxides, alkylperoxides, peroxyesters, peroxycarbonates, peroxyketones, peroxydicarbonates, 2,2'-azobis(isobutylnitrile), 2,2'-azobis(2,4-dimethylpentanenitrile), 2,2'-azobis(2,4-dimethylvaleronitrile), 2,2'-azobis(2-methylpropanenitrile), 2,2'- Azobis(2-methylbutyronitrile), 1,1'-azobis(cyclohexanecarbonitride), 1,1'-azobis(cyanocyclohexane), benzoyl peroxide, decanoyl peroxide, lauroyl peroxide, di(n-propyl)peroxydicarbonate, di(sec-butyl)peroxydicarbonate, di-(2-ethylhexyl)peroxydicarbonate, 1,1-dimethyl-3-hydroxybutylperoxyneodecanoate, α-cumylperoxyneoheptanoate, t-amylperoxyneodecanoate, t- Tylperoxyneodecanoate, t-amylperoxypivalate, t-butylperoxypivalate, 2,5-dimethyl2,5-di(2-ethylhexanoylperoxy)hexane, t-amylperoxy-2-ethyl-hexanoate, t-butylperoxy-2-ethylhexanoate, t-butylperoxyacetate, di-t-amylperoxyacetate, t-butylperoxide, di-t-amylperoxide, 2,5-dimethyl-2,5-di-(t-butylperoxy)hexyn-3, cumenehydroperoxide, 1,1-di-(t- A selection from the group consisting of butylperoxy)-3,3,5-trimethylcyclohexane, 1,1-di-(t-butylperoxy)-cyclohexane, 1,1-di-(t-amylperoxy)-cyclohexane, ethyl-3,3-di-(t-butylperoxy)-butyrate, t-amylperbenzoate, t-butylperbenzoate, ethyl3,3-di-(t-amylperoxy)-butyrate, and combinations thereof, more preferably 4,4'-azobis(4-cyanovaleric acid), 1,1'-azobis(cyclohexanecarbonile), 2,A consumer product composition according to any one of paragraphs A to G, comprising 2'-azobis(2-methylbutyronitrile) and at least one free radical initiator selected from the group consisting of combinations thereof. I. A consumer product composition according to any one of paragraphs A to H, wherein at least one free radical initiator is present in a concentration of about 20% to about 60% by weight, preferably about 20% to about 50% by weight, more preferably about 20% to about 45% by weight, and even more preferably about 20% to about 35% by weight of the polymer wall. The consumer product composition according to any one of paragraphs A to I, wherein the J. core and polymer wall are present in a weight ratio of about 96:4 to about 99:1, preferably about 97:3 to about 99:1, and more preferably about 97:3 to about 98:2. K. A consumer product composition according to any one of paragraphs A to J, wherein the core contains a beneficial agent in an amount of 5% to 100% by weight of the core. L. A consumer product composition according to any one of paragraphs A to K, wherein the beneficial agent comprises an aldehyde-containing beneficial agent, a ketone-containing beneficial agent, or a combination thereof. M. A consumer product composition according to any one of paragraphs A to L, wherein the beneficial agent comprises a fragrance, preferably the fragrance comprising at least about 20% by weight of an aldehyde-containing fragrance raw material, a ketone-containing fragrance raw material, or a combination thereof. The consumer product composition according to any one of paragraphs A to M, wherein the core comprises a partitioning regulator, preferably the partitioning regulator is present in the core at a concentration of about 5% to about 55% by weight, more preferably the partitioning regulator is selected from the group consisting of isopropyl myristate, vegetable oil, modified vegetable oil, mono-, di-, and tri-esters of C4-C24 fatty acids, dodecanophenone, lauryl laurate, methyl behenate, methyl laurate, methyl palmitate, methyl stearate, and mixtures thereof, and even more preferably isopropyl myristate. O. A consumer product composition according to any one of paragraphs A to N, wherein the polymer wall of the delivery particle further contains a polymer emulsifier captured in the polymer wall, and preferably the polymer emulsifier contains polyvinyl alcohol. P. A consumer product composition according to any one of paragraphs A to O, wherein the delivered particles are characterized by a volume-weighted median particle size of about 10 to about 100 microns, 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. Q. A consumer product composition according to any one of paragraphs A to P, wherein the group of delivered particles is characterized by an average breaking strength of about 0.5 to about 5 MPa, preferably about 1 to about 3 MPa, more preferably about 1 to about 2 MPa. R. A consumer product composition according to any one of paragraphs A to Q, wherein the delivered particles include a coating. S. A consumer product composition according to any one of paragraphs A to R, wherein the consumer product auxiliary material is selected from the group consisting of surfactants, conditioning active substances, adhesion aids, rheological modifiers or structuring agents, bleaching agents, stabilizers, builders, chelating agents, color transfer inhibitors, dispersants, enzymes, enzyme stabilizers, catalytic metal complexes, polymer dispersants, clay and stain removers / anti-redeposition agents, whitening agents, foam inhibitors, silicones, colorants, aesthetic dyes, undiluted fragrances, additional fragrance delivery systems, structural elastochemicals, carriers, hydrotropes, processing aids, anti-aggregating agents, coatings, formaldehyde scavengers, pigments, and mixtures thereof. T. A consumer product composition according to any one of paragraphs A to S, wherein the composition is a fabric care composition, a hard surface cleaning composition, a dish care composition, a hair care composition, a body cleansing composition, or a mixture thereof, preferably a fabric care composition, more preferably a laundry detergent composition, a fabric conditioning composition, a laundry additive, a fabric pretreatment composition, a fabric refresher composition, or a mixture thereof. U. A consumer product composition according to any one of paragraphs A to T, wherein the composition is in the form of a liquid composition, a granular composition, a hydrocolloid, a single-compartment pouch, a multi-compartment pouch, a soluble sheet, pastiles or beads, a fibrous article, a tablet, a stick, a bar, a flake, a foam / mousse, a nonwoven sheet, or a mixture thereof. V. A method for treating a surface, comprising the step of bringing the surface into contact with a consumer product composition described in any one of paragraphs A to U, optionally in the presence of water.

[0160] Test method It will be understood that the values ​​of each parameter of the subject matter claimed and described herein should be determined using the test methods disclosed in the chapter on test methods of this application.

[0161] Extraction of delivery particles from the final product Unless otherwise specified herein, preferred methods for isolating delivery particles from the final product are based on the fact that the density of most such delivery particles differs from that of water. The final product is mixed with water to dilute and / or release the delivery particles. The diluted product suspension is centrifuged to accelerate the separation of the delivery particles. Such delivery particles tend to float or sink in the diluted solution / dispersion of the final product. Using a pipette or spatula, the upper and lower layers of this suspension are removed and subjected to further dilution and centrifugation rounds to separate and concentrate the delivery particles. The delivery particles are observed at a combined magnification of 100x to at least 400x using an optical microscope equipped with a cross-polarization filter or differential interference contrast (DIC). Microscopic observation provides initial indicators of the presence, size, and aggregation of the delivery particles.

[0162] To extract delivery particles from the final liquid fabric improver product, follow these steps: 1. Place three aliquots of approximately 20 mL of liquid fabric conditioner into three separate 50 mL centrifuge tubes. Dilute each aliquot with deionized water in a 1:1 ratio (for example, 20 mL of fabric conditioner + 20 mL of deionized water), mix each aliquot thoroughly, and centrifuge each aliquot at approximately 10,000 × g for 30 minutes. 2. After centrifugation in step 1, discard the bottom water layer (approximately 10 mL) from each 50 mL centrifuge tube, and then add 10 mL of deionized water to each 50 mL centrifuge tube. 3. Repeat the process of centrifugation, removal of the bottom layer, and subsequent addition of 10 mL of deionized water to each 50 mL centrifuge tube two more times for each aliquot. 4. Remove the top layer using a spatula or pipette. 5. Transfer this top layer to a 1.8 mL centrifuge tube and centrifuge at approximately 20,000 × g for 5 minutes. 6. Remove the top layer with a spatula, transfer to a new 1.8 mL centrifuge tube, add deionized water until the tube is completely filled, then centrifuge at approximately 20,000 × g for 5 minutes. 7. Remove the bottom layer with a fine pipette, add deionized water until the tube is completely filled, and centrifuge at approximately 20,000 × g for 5 minutes. 8. Repeat step 7 five more times (a total of six times).

[0163] If both the top and bottom layers appear to be rich in delivery particles in step 1 above, proceed immediately to step 3 (i.e., skip step 2) and then to steps 4-8. Once those steps are complete, remove the bottom layer from the 50 mL centrifuge tube from step 1 using a spatula and / or pipette. Transfer the bottom layer to a 1.8 mL centrifuge tube and centrifuge at approximately 20,000 × g for 5 minutes. Remove the bottom layer from the new tube, add deionized water until the tube is completely filled, and then centrifuge at approximately 20,000 × g for 5 minutes. Remove the top layer (water), and add deionized water again until the tube is filled. Repeat this 5 more times (6 times in total). Return the isolated top and bottom layers rich in delivery particles together.

[0164] If the fabric conditioner is white or it is difficult to distinguish the layer rich in delivery particles, add 4 drops of dye (such as Liquitint Blue JH 5% premix from Milliken & Company, Spartanburg, South Carolina, USA) to the centrifuge tube in step 1 and proceed with isolation as described.

[0165] To extract delivery particles from solid end products that readily disperse in water, 1 L of deionized water is mixed with 20 g of the end product (e.g., detergent foams, films, gels, and granules, or water-soluble polymers; soap flakes and soap bars, as well as other water-soluble matrices such as salts, sugars, clays, and starches). When extracting delivery particles from end products that do not readily disperse in water, such as waxes, dryer sheets, dryer bars, and greasy materials, it may be necessary to add detergent to the product and diluent, and stir and / or gently heat it to release the delivery particles from the matrix. The use of organic solvents during the extraction process or drying of the delivery particles should be avoided, as these operations may damage the delivery particles during this stage.

[0166] For the extraction of delivery particles from liquid final products that are not fabric softeners or fabric improvers (e.g., liquid laundry detergent, liquid dish soap, liquid hand soap, lotion, shampoo, conditioner, and hair dye), 20 ml of the final product is mixed with 20 ml of deionized water. NaCl (e.g., 1-4 g of NaCl) may be added to the dilution suspension as needed to increase the density of the solution and facilitate the buoyancy of the delivery particles to the top layer. If the product has a white color that makes it difficult to distinguish the layer of delivery particles formed during centrifugation, a water-soluble dye may be added to the diluent to provide a visual contrast.

[0167] The mixture of water and product is subjected to a series of centrifugation rounds, involving the removal of the top and bottom layers and resuspending those layers in a fresh diluent, followed by further centrifugation, isolation, and resuspension. Each round of centrifugation is performed in a 1.5–50 ml tube using a centrifugal force of up to 20,000 × g for 5–30 minutes. Typically, at least 6 rounds of centrifugation are required to extract and purify enough delivery particles for testing. For example, the first round of centrifugation may be performed in a 50 ml tube rotated at 10,000 × g for 30 minutes, followed by 5 more rounds of centrifugation, where the material from the top and bottom layers is separately resuspended in fresh diluent in 1.8 ml tubes and rotated at 20,000 × g for 5 minutes per round.

[0168] If delivery particles are observed microscopically in both the upper and lower layers, the delivery particles from these two layers are combined again after the final centrifugation step to create a single sample containing all the delivery particles extracted from the product. The extracted delivery particles should be analyzed as soon as possible, but may be stored as a deionized aqueous suspension for up to 14 days before analysis.

[0169] Those skilled in the art will recognize that various other protocols can be constructed to extract and isolate delivery particles from the final product, and that such methods require verification through comparison of measurements obtained by adding the delivery particles to the final product and measuring them before and after extraction.

[0170] Determination regarding fragrance leakage To determine fragrance leakage, a liquid detergent containing a fragrance encapsulation is prepared and stored (e.g., at 35°C for one week), and then compared to a reference sample of liquid detergent containing the same concentration of total fragrance (e.g., 1% by weight) but without the encapsulation.

[0171] To prepare the internal standard solution, weigh out 70 mg of tonalid, add 20 mL of hexane-PA, and mix. Add 200 μL of this mixture to 20 mL of hexane-PA, mix and homogenize to form the internal standard solution.

[0172] To extract fragrance from the liquid phase of a test sample or reference sample, place 2 grams of detergent sample and 2 mL of internal standard solution into an extraction vessel. Extract the free fragrance from the detergent sample by gently inverting the extraction vessel 20 times by hand. Add a spoonful of sodium sulfate to the extraction vessel. This will cause layer separation.

[0173] To collect gas chromatography data, immediately after separation into layers, the hexane layer is transferred to a gas chromatograph autosampler vial and the vial is capped. 1.5 μL of the splitless sample is injected into the gas chromatograph injection port. Gas chromatography-mass spectrometry (Durawax-4 [60 m, 0.32 mm ID, 0.25 μm film] chromatographic separation at 40°C / 4°C / min / 230°C / 20') is performed.

[0174] The amount of fragrance leakage from the encapsulation per fragrance material is calculated according to the following calculation.

[0175]

number

[0176] To determine the fragrance retention rate (for example, the percentage of fragrance remaining within the inclusion), subtract the "fragrance leakage rate %" from 100.

[0177] 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.

[0178] Fragrances, fragrance ingredients, and / or distribution regulators A. Identity and total quantity To determine the identity and quantify the total amount of fragrances, fragrance components, or fragrance raw materials (PRMs), or partitioning modifiers encapsulated in the capsule slurry and / or within the delivery agent inclusions, 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 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 standards. 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 encapsulated in the product, along with the sample weight, are then used to determine the total weight percentage of each PRM in the encapsulated fragrance. PRMs are identified from the mass spectrometry peaks.

[0179] B. Amount of unsealed material To determine the amounts of unencapsulated fragrances and (optionally) distribution modifier materials in compositions such as slurries, the following apparatus may be used for this analysis, using the analytical procedure provided after the table.

[0180] [Table 1]

[0181] 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 with the above ISS hexane solution. ISS hexane is 0.1 g of tetradecane in 4 liters of hexane.

[0182] To prepare a 5% surfactant solution, weigh 50g + / - 1g 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.

[0183] To prepare a sample of the PMC composition (e.g., slurry), ensure that the composition (e.g., slurry) is thoroughly mixed, and 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.

[0184] To operate the instrument, the target ions for quantification of each PRM (and optionally, the partitioning regulator) are determined, along with at least 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.

[0185] The amount of free oil is determined from the response of each PRM to the calibration curve and is summed up across all different fragrance materials and, optionally, the distribution regulator.

[0186] C. Determination of the enclosed substance The determination of the sealed oil and, optionally, the distribution regulator is made by subtracting the weight of the free / unsealed oil found in the composition from the total weight of the oil found in the composition (e.g., slurry).

[0187] Analytical determination of wall materials This method determines the amount of wall material. First, wall material particles with a diameter greater than 0.45 micrometers are isolated by dead-end filtration. Subsequent analysis by thermogravimetric analysis allows for the exclusion of inorganic materials and other (organic) raw material slurry components.

[0188] A. Sample preparation This procedure involves applying dead-end filtration to remove the soluble fraction of the sample. Different solvents are used sequentially to maximize the removal of interfering substances before TGA analysis.

[0189] Use the following materials and / or equipment. ●Filtration device ○ Vacuum pump: Millipore Model WP6122050 or equivalent. ○Thick-walled vacuum tube for connecting a pump to a filtration system. ○ Filtration flask, 500ml or 1000ml. ○ Filtration cup: For example, a 250ml Millipore Filtration funnel ("Milli Cup"), filtration material: 0.45 micrometer membrane, solvent resistant. ○ A sealable plastic container for housing a filtration device while measuring. ○Standard laboratory glassware (glass beakers 100-250 ml, graduated cylinders 50-250 ml). ●Drying equipment ○ Vacuum oven and vacuum pump (setting 60-70°C / vacuum: 30-inch mercury vacuum). ○ Desiccator or constant humidity chamber (to keep residues under controlled conditions during cooling). ● Solvent ○All solvents: Minimum analytical grade: 2-propanol, acetone, chloroform.

[0190] The filtration procedure is as follows: To prepare the filtration device, record the weight of the filtration device (e.g., a Milli cup filter) that has been pre-dried to 0.1–0.2 mg. Pre-drying involves the same drying process that will be performed on the filter after filtration is complete.

[0191] Filter the sample by weighing 1-2 grams of slurry material (Note: up to 0.1-0.2 mg in weight) into a glass beaker (250 ml) or by weighing it directly into the filtration device. Add 20 ml of deionized water and swirl to homogenize the sample. Add 80 ml of isopropyl alcohol to homogenize the sample with the solvent. Use heat to agglomerate the sample. Place the filtration device on the filtration bottle and start filtration under vacuum. After filtration is complete, add 100 ml of chloroform. Continue filtration. Add 10-20 ml of acetone and filter through the membrane to remove trace amounts of chloroform. Remove the filter from the filtration system and dry it in a vacuum oven. After cooling, weigh the filter and record its weight.

[0192] The weight difference between the filter + residue and the filter weight alone (= net weight of the residue after filtration) is divided by the weight of the raw slurry sample, and multiplied by 100 to calculate the residue percentage (weight residue), obtaining the percentage unit. Continue measuring the residue percentage using TGA analysis.

[0193] Thermogravimetric analysis (TGA) is performed using the following equipment and setup: TGA: TA instruments Discovery TGA; Pan: Sealed aluminum; Purge: 50 ml / min N2; Procedure: Heat to 500°C at 10°C / min; The TGA is connected to a Nicolet Nexus 470 FTIR spectrometer for the generated gas.

[0194] In TGA data analysis, weight loss between 350 and 500°C is due to the decomposition of the polymer wall material of the fragrance microcapsules and the still-residual (burned) fragrance compounds. This weight loss is used for the calculation of the insoluble polymer fraction. At 500°C, unburned residues are still present and should be taken into consideration when calculating the insoluble polymer fraction.

[0195] Core: Analytical determination of wall ratio If the core and wall material inputs are not readily available, the core-to-wall ratio of the encapsulation can be determined analytically using the method described herein.

[0196] More specifically, the above method allows for the determination (by weight) of the amounts of fragrance, partitioning regulator, and wall material in a fragrance capsule composition (e.g., slurry), and can be used to calculate the core:wall ratio. This is done by dividing the total amount (by weight) of fragrance + partitioning regulator found in the composition by the amount (by weight) of crosslinking wall material found in the composition.

[0197] Test methods for determining LogP For each PRM in the fragrance mixture under test, calculate the log value (logP) of the octanol / water partition coefficient. The logP values ​​for individual PRMs are calculated using the Consensus logP Computational Model, version 14.02 (Linux®), available from Advanced Chemistry Development Inc. (ACD / Lab) (Toronto, Canada), yielding dimensionless logP values. The ACD / Labs Consensus logP Computational Model is part of the ACD / Labs model suite.

[0198] Volume-weighted particle size and particle 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. A sample of the delivery capsules in the suspension is introduced, 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 resulting volume-weighted PSD data is plotted and recorded, and the desired volume-weighted particle size values ​​(e.g., median / 50th percentile, 5th percentile, and / or 90th percentile) are determined.

[0199] The broadness index can be calculated by determining the diameter of the delivered particles that exceed 90% of the cumulative particle volume (90% diameter), the particle size that exceeds 5% of the cumulative particle volume (5% diameter), and the volume-weighted median particle size (50% diameter: the diameter that exceeds and falls below 50% of the particle volume). Broadness index = ((90% diameter) - (5% diameter)) / 50% diameter

[0200] Method of testing for fracture strength To measure the average fracture strength of a group and / or to determine the delta fracture strength, three different measurements are performed: i) the volume-weighted capsule diameter distribution, ii) the diameters of 10 individual capsules (and / or 30 individual capsules at the volume-weighted median diameter, if the average fracture strength is determined) within each of three specified diameter ranges, and iii) the fracture force of those same 30 individual capsules. a.) Determine the volume-weighted capsule diameter distribution as described above. Plot and record the obtained volume-weighted PSD data, and determine the median, 5th percentile, and 90th percentile values. b.) The diameter and breaking force (also known as bursting force) of individual capsules are measured via a custom computer-controlled micromanipulation instrument system having a lens and camera capable of imaging the delivery capsule and a thin planar-end probe connected to a force transducer (such as Model 403A, available from Aurora Scientific Inc., Canada) or equivalent, as described below and available at the University of Birmingham, Edgbaston, Birmingham, UK: Zhang, Z. et al. (1999) "Mechanical strength of single microcapsules determined by a novel micromanipulation technique." J. Microencapsulation, vol 16, no. 1, pages 117-124, and Sun, G. and Zhang, Z. (2001) "Mechanical Properties of Melamine-Formaldehyde microcapsules." J. Microencapsulation, vol 18, no. 5, pages 593-602. c.) Place a drop of the delivery capsule suspension onto a microscope slide and allow it to dry under ambient conditions for several minutes to remove water, obtaining a low-density, single-layer isolated capsule on the dry slide. Adjust the capsule concentration in the suspension as needed to obtain a suitable capsule density on the slide. Two or more slide preparations may be required. d.) Next, the slide is placed on the sample holding stage of the micromanipulation instrument. Thirty beneficial agent delivery capsules on the slide are selected for measurement, so that 10 selected capsules are present in each of three predetermined diameter ranges. Each diameter range refers to the diameter of the capsule derived from the volume-weighted PSD generated by the Accusizer. The three diameter ranges for the capsules are median / 50th percentile diameter ±2 μm, 5th percentile diameter ±2 μm, and 90th percentile diameter ±2 μm. Capsules that are shrunk, leaking, or damaged are excluded from the selection process and are not measured. i. If sufficient capsules are not available within a specific diameter range of + / - 2 μm, the diameter range may be increased to + / - 5 μm. ii. When the average fracture strength of the population is determined, 30 (or more) capsules may be measured within the median / 50th percentile diameter range. e.) For each of the 30 selected capsules, the capsule diameter is measured and recorded from the image on the micromanipulation device. The same capsule is then compressed at a speed of 2 μm / s between two flat surfaces, i.e., a force probe at the flat end and a microscope slide, causing the capsule to burst. During the compression process, the force of the probe is continuously measured and recorded by the data acquisition system of the micromanipulation device. f.) The cross-sectional area is calculated for each selected capsule, using the measured diameter and assuming a spherical capsule (where r is the radius of the capsule before compression, πr 2The breaking force is determined for each selected capsule from recorded force probe measurements, as shown in Zhang, Z. et al. (1999) "Mechanical strength of single microcapsules determined by a novel micromanipulation technique." J. Microencapsulation, vol 16, no. 1, pages 117-124, and Sun, G. and Zhang, Z. (2001) "Mechanical Properties of Melamine-Formaldehyde microcapsules." J. Microencapsulation, vol 18, no. 5, pages 593-602. g.) The fracture strength of each of the 30 capsules is calculated by dividing the fracture force (in Newtons) by the calculated cross-sectional area of ​​each capsule. h.) Calculation: The average fracture strength of the population is determined by averaging the fracture strength values ​​of (at least) 30 capsules within the median / 50th percentile diameter range.

[0201] The delta fracture strength is calculated as follows:

[0202]

number

[0203] The embodiments provided below are intended to be illustrative and not limiting.

[0204] Example 1. Exemplary synthesis of delivery particles and related calculations An exemplary synthesis process for a population of delivery particles is provided below. Details of the materials used are provided in Table 1A.

[0205] [Table 2]

[0206] A. Description of the synthesis process (36 micron capsule, 98.2 core-to-wall weight ratio, initiator concentration approximately 24%) Under nitrogen conditions, 107.3 grams of perfume oil and 103.0 grams of isopropyl myristate are mixed in a 1 L capacity stainless steel reactor with a water jacket, and then mixed using a high-shear mixer equipped with mill blades. The solution is then fermented for 35 minutes. ℃ After heating, 0.76 grams of Vazo67 (initiator) is added, followed by the entire mixture at 70°C. ℃ After heating to 50°C and maintaining that temperature for 45 minutes, the system was then heated to 50°C. ℃ Cool to this temperature. As soon as this temperature is reached, introduce the separately prepared solutions containing 47.3 grams of perfume oil, 0.06 grams of CD9055, 0.06 grams of TBAEMA, and 3.96 grams of CN975 into the reactor and mix the whole mixture for 50 minutes. ℃ Mix for 10 minutes. Then, after stopping the stirring, add an aqueous phase to the reactor consisting of 80.2 grams of emulsifier (5% solution of PVOH540), 255.0 grams of RO water, 0.51 grams of V-501, and 0.51 grams of NaOH (21% solution). Following the addition of the aqueous phase, grind until the particle size reaches a target of 36 microns. Then, first grind the emulsion to 75 ℃ Heat to 25°C, maintain that temperature for 240 minutes, then 95°C ℃ After heating for 360 minutes, 25 ℃ Cool to room temperature. At this point, drain the slurry from the reactor into a container and add the rheological modifier (xanthan gum 1.19 g) and preservative (Acticide BWS-10; 0.45 g). Mix the rheological modifier for 30 minutes. Add the preservative last and mix for 5-10 minutes. Then, characterize the finished slurry and test it to determine if it is suitable.

[0207] B. Sample Calculation - Part A Capsule Core:Wall Weight Ratio The core:wall weight ratio is determined by dividing the total weight of core material inputs (e.g., fragrance oils and distribution regulators) by the total weight of wall material inputs (e.g., wall monomers and initiators). Alternatively, the relative percentage of core material in a particle population can be determined by dividing the total weight of core material inputs by the sum of the total weight of core material inputs and the total weight of wall material inputs, and multiplying by 100. The remaining percentage (100-% core) is the relative percentage of wall material, and these numbers can then be expressed as ratios. Similarly, the relative percentage of wall material in a particle population can be determined by dividing the total weight of wall material inputs by the sum of the total weight of core material inputs and the total weight of wall material inputs, and multiplying by 100.

[0208] Sample calculations for the "98:2" capsules formed by the examples in this chapter are provided below, where the core comprises an oil and a distribution modifier (isopropyl myristate), and the wall comprises wall monomers (CN975, CD9055, and TBAEMA) and initiators (Vazo67 and V-501).

[0209]

number

[0210] C. Sample Calculation - Part A: Initiator Concentration in Capsules The amount of free radical initiator in the capsule wall, expressed as a percentage of wall weight, is determined by dividing the total amount of initiator by the wall material, i.e., the wall monomer and initiator. Sample calculations for capsules formed by the examples in this section are provided below.

[0211]

number

[0212] D. Additional delivery particle population Other populations of delivery particles can be prepared by substantially following the process described in Part A of this embodiment, but by varying the amount of inputs. For example, the comparative population of delivery particles and the population of delivery particles of the present invention can be prepared by substantially following the process described in Part A, but using the inputs shown in the table below. For convenience, the inputs for the particle population of Part A are also provided in Table 1B below. Population B is the comparative population, as the initiator concentration is about 8.9% by weight of the wall polymer.

[0213] [Table 3]

[0214] Example 2. Initiator concentration and beneficial agent leakage To test the effect of free radical initiator concentration on beneficial agent leakage, several populations of polyacrylate-walled delivery particles are prepared, generally following Example 1 above. The particles have a core:wall weight ratio of 97.5:0.5 and use the same wall material. However, the free radical initiator concentration in at least some populations is varied as provided in Table 2. In addition, a comparative population of delivery particles with a core:wall weight ratio of 90:10 is provided. The particles are prepared to have a target average particle size of approximately 38 microns (±4 microns).

[0215] In Table 2, initiator concentrations are given as weight percentages based on the weight of the polymer wall (e.g., wall monomer + free radical initiator). Relative initiator amounts are based on the initiator concentration of a 90:10 comparative delivery particle (e.g., "1x"). The 97.5:2.5 delivery particles in Leg 2 feature the same "1x" initiator concentration, even though the amount of total wall material relative to the core material is smaller, since the initiator % concentration is the same. If twice the amount of initiator is used, the relative initiator concentration will be "2x".

[0216] The core of each group contains the same fragrance material and distribution regulator (isopropyl myristate), present in a weight ratio of 60:40. The fragrance material contains approximately 9.6% aldehyde-containing fragrance raw materials and approximately 5.7% ketone-containing fragrance raw materials.

[0217] A sample of delivery particles is supplied to a heavy-duty liquid (HDL) laundry detergent and stored at 35°C for one week. At the end of the storage period, the product is tested for fragrance leakage from the delivery particles for specific fragrance ingredients according to the test method provided above. The results are provided in Table 2 below. The amount of particle leakage is presented as a percentage of the initially sealed, selected PRM.

[0218] [Table 4] a Initiator 1 = Vazo 67 b Initiator 2 = V-501 c Average leakage over 3 trials

[0219] As shown in Table 2, delivery particles with a core:wall weight ratio of 90:10 and an initiator concentration of "1x" exhibit relatively low leakage when stored in HDL laundry detergent. However, these particles are characterized by relatively low packing capacity.

[0220] Using a similar initiator concentration (here, 0.8 times) in delivery particles with a core:wall weight ratio of 97.5:2.5 results in relatively high leakage (e.g., over 20%), which is likely to result in suboptimal performance under normal operating conditions.

[0221] As shown in the results in Table 2, increasing the relative amount of free radical initiator results in particles exhibiting relatively low leakage (e.g., less than 20%). It should be noted that even when the capsules in Legs 3 and 4 use relatively little wall material, the leakage rates are quite close to those of the 90:10 capsules in Leg 1.

[0222] Example 3. Initiator concentration (core:wall ratio of 90:10 vs. 98:2) To test the effect of free radical initiator concentration on encapsulation and performance, several groups of polyacrylate wall-delivered particles are prepared, generally according to Example 1 above. The encapsulated fragrance contains approximately 17% aldehyde-based fragrance raw materials and approximately 0.2% PRM containing ketone functional groups.

[0223] Table 3 below provides the core:wall weight ratio and free radical initiator concentration for different test legs. The delivered particles are produced on a production scale of approximately 3 kg.

[0224] [Table 5]

[0225] As shown in Table 3, delivery particles with a core-to-wall weight ratio of 90:10 are characterized by good encapsulation and performance, even at relatively low initiator concentrations (Leg 1). However, with the same relative amount of initiator, increasing the core-to-wall ratio to 98:2 (Leg 2) results in poorly performing capsules. However, increasing the relative amount of initiator concentration can improve performance in such capsules (Leg 3).

[0226] Example 4. Initiator concentration To test the effect of free radical initiator concentration on encapsulation, several groups of polyacrylate wall-delivered particles are prepared, generally according to Example 1 above. The encapsulated fragrance contains approximately 30% aldehyde-based fragrance raw materials and approximately 4.2% PRM containing ketone functional groups.

[0227] The weight ratio of the core to the wall and the free radical initiator concentration are provided in Table 3 below. The delivered particles are produced on a production scale of approximately 3 kg.

[0228] [Table 6]

[0229] As shown in Table 4, relatively high concentrations of free radical initiators in delivery particles with a high core:wall weight ratio (e.g., 98:2) indicate an improvement in the relative use of wall monomers. However, in the applicant's experience, excessively high initiator concentrations can sometimes adversely affect the efficiency of fragrance encapsulation and / or leakage in the final product.

[0230] The initiator can be added before emulsification, and additional aliquots can be added after emulsification. Compared to a baseline amount of 1 to 3 times the amount of initiator, any further portion (1 to 9 times) of initiator addition in further steps during the encapsulation process was found to result in an even more robust wall and further reduction of leakage. It is assumed that the further portion in the further addition step may be added in one or more further addition steps. It was surprising to observe that the overall performance of the delivery particle population could actually be improved when initiators were added in multiple steps, even partially after emulsification.

[0231] Example 5. Initiator concentration and breaking strength To test the effect of initiator concentration on particle fracture strength, several populations of polyacrylate wall-delivered particles are prepared, generally following Example 1 above. The particles have a core:wall weight ratio of 98:2 and use the same wall material. However, the free radical initiator concentration in at least some populations is varied as provided in Table 5A. In addition, a comparative population of 90:10 core:wall-delivered particles is provided. The particles are prepared to have a target average particle size of approximately 36 microns (±3 microns).

[0232] In Table 5A, the initiator concentration is provided as a weight percentage based on the weight of the polymer wall (e.g., wall monomer + free radical initiator). As in the previous examples, the relative initiator amount is based on the initiator concentration of a 90:10 comparative delivery particle (e.g., "1x").

[0233] The cores of each group contain the same fragrance material and dispensing regulator (isopropyl myristate) and are present in a weight ratio of 60:40. The fragrance material contains approximately 9.6% aldehyde-containing fragrance raw materials and approximately 5.7% ketone-containing fragrance raw materials.

[0234]

Table 7

[0235] According to the test method provided above, each group from Table 5A is analyzed for particle size (particle size, Ps, in microns) and fracture strength (Fracture Strength, FS, in MPa). The measured values for each group are determined at different points (5%, 50%, and 90%) of the particle size distribution. The results are provided in Table 5B.

[0236]

Table 8

[0237] First, the data in Table 5B shows that the 90:10 particles of Leg 1 have a wide range of fracture strength values from particle size d5 to d90. This indicates that the particles of the group rupture under different environments, resulting in inconsistent performance. Furthermore, the particles of Leg 1 have a packing volume below the optimum.

[0238] Next, the data in Table 5B shows that the 98:2 particles of Leg 3 exhibit relatively consistent fracture strength across the particle size distribution of the group. Furthermore, the fracture strength of Leg 3 is consistently between 1 MPa and 2 MPa across the diameter distribution (1.66, 1.31, 1.18 MPa of FS), which is considered a desirable FS range for freshness performance in consumer product compositions, such as fabric care compositions.

[0239] The measured range and size of the particles in Leg 3 are compared with the measured values ​​of the particles in Leg 2 (FS of 2.65 to 0.93 MPa), which were prepared using a relatively small amount of free radical initiator, and the measured values ​​of the particles in Leg 4 (FS of 0.91 to 0.30 MPa), which were prepared using a relatively large amount of free radical initiator.

[0240] In particular, the particle population of Leg 4, which consistently exhibits a fracture strength of less than 1.0 MPa, appears to be relatively brittle and likely to rupture before reaching its intended touchpoint, making it less desirable for use in many consumer product applications.

[0241] Example 6. Exemplary formulation - liquid fabric improver Table 6 shows exemplary formulations of the compositions according to this disclosure. Specifically, the following compositions are liquid fabric conditioner products.

[0242] [Table 9] 1 Esterquat 1 is a mixture of bis-(2-hydroxypropyl)-dimethylammonium sulfate methyl fatty acid ester, (2-hydroxypropyl)-(1-methyl-2-hydroxyethyl)-dimethylammonium sulfate methyl fatty acid ester, and bis-(1-methyl-2-hydroxyethyl)-dimethylammonium sulfate methyl fatty acid ester, and the fatty acid ester is produced from a C12-C18 fatty acid mixture (REWOQUAT DIP V 20 M Conc, ex Evonik). 2 N,N-bis(hydroxyethyl)-N,N-dimethylammonium chloride fatty acid ester, manufactured from Esterquat 2: C12-C18 fatty acid mixture (REWOQUAT CI-DEEDMAC, ex Evonik). 3 Esterquat 3: Esterification products of triethanolamine-containing (C16-18 and C18 unsaturated) fatty acids, quaternized with dimethyl sulfate (REWOQUAT WE 18, ex Evonik). * The delivered particles according to this disclosure are, i.e., the aggregate formed in Example 1 above. The “active substance %” provided is the amount of fragrance delivered to the composition.

[0243] Example 7. Exemplary formulation - Laundry additive particles Table 7 shows exemplary formulations of the compositions according to the present disclosure. Specifically, the following compositions are laundry additive particles in the form of pastilles or "beads," and are commercially available products marketed, for example, as DOWNY UNSTOPABLES®.

[0244] [Table 10] 1 PLURIOL E8000 (ex BASF) 2 Esterification products of triethanolamine-containing (C16-18 and C18 unsaturated) fatty acids, quaternized with dimethyl sulfate (REWOQUAT WE 18, ex Evonik). 3 Cationically modified hydroxyethylcellulose 4 The fragrance delivery particles according to this disclosure, i.e., the aggregate formed in Example 1 above. The percentage provided is the amount of aqueous slurry provided to the composition, and the slurry contains about 45% by weight of delivery particles (core + shell).

[0245] The dimensions and values ​​disclosed herein should not be understood as being strictly limited to the exact numerical values ​​listed. Instead, unless otherwise explicitly stated, 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."

[0246] All documents referenced herein, including any patents or 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 expressly excluded or otherwise limited. No reference of any document 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.

[0247] 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 consumer product composition, A collection of delivery particles, The delivery particle comprises a core and a polymer wall surrounding the core, The polymer wall comprises a (meth)acrylate polymer at least partially derived from a wall monomer and at least one free radical initiator. The wall monomer comprises at least 50% by weight of the (meth)acrylate monomer, and the (meth)acrylate monomer comprises a polyfunctional aromatic urethane acrylate or polyfunctional urethane acrylate ester, an amine (meth)acrylate, and an acidic (meth)acrylate. The at least one free radical initiator is present in the polymer wall at a concentration of 32.3% to 60% by weight, The at least one free radical initiator comprises 4,4'-azobis(4-cyanovaleric acid) and 2,2'-azobis(2-methylbutyronitrile), The aforementioned core contains a beneficial agent, A group of delivery particles in which the core and the polymer wall are present in a weight ratio of 95:5 to 99.5:0.5, Includes consumer product auxiliary materials, A consumer product composition in which the beneficial agent comprises an aldehyde-containing fragrance raw material and a ketone-containing fragrance raw material.

2. The consumer product composition according to claim 1, wherein the wall monomer comprises at least 60% by weight of (meth)acrylate monomer of the wall monomer.

3. The consumer product composition according to claim 1 or 2, wherein the polyfunctional aromatic urethane acrylate or polyfunctional urethane acrylate ester is a hexafunctional aromatic urethane acrylate or hexafunctional urethane acrylate ester.

4. The consumer product composition according to claim 1, wherein the 4,4'-azobis(4-cyanovaleric acid) and the 2,2'-azobis(2-methylbutyronitrile) are present in a weight ratio of 5:1 to 1:

5.

5. The consumer product composition according to claim 1 or 2, wherein the core and the polymer wall are present in a weight ratio of 96:4 to 99:

1.

6. The consumer product composition according to claim 1 or 2, wherein the delivered particles are characterized by a volume-weighted median particle size of 10 to 100 microns.

7. The consumer product composition according to claim 1 or 2, wherein the group of delivered particles is characterized by an average fracture strength of 0.5 to 5 MPa.

8. The consumer product composition according to claim 1 or 2, wherein the consumer product auxiliary material is selected from the group consisting of surfactants, conditioning active substances, adhesion aids, rheological modifiers or structuring agents, bleaching agents, stabilizers, builders, chelating agents, color transfer inhibitors, dispersants, enzymes, enzyme stabilizers, catalytic metal complexes, polymer dispersants, clays and stain removers / anti-redeposition agents, whitening agents, foam inhibitors, silicones, colorants, aesthetic dyes, undiluted fragrances, additional fragrance delivery systems, structural elastochemicals, carriers, hydrotropes, processing aids, anti-aggregating agents, coatings, formaldehyde scavengers, pigments, and mixtures thereof.

9. The consumer product composition according to claim 1 or 2, wherein the composition is a fabric care composition, a hard surface cleaning composition, a dish care composition, a hair care composition, a body cleansing composition, or a mixture thereof.

10. A method for manufacturing a consumer product composition, The aforementioned consumer product composition Consumer product processing aids, A collection of delivery particles, The delivery particle comprises a core and a polymer wall surrounding the core, The aforementioned delivery particles A step of providing an oil phase containing a beneficial agent, The process of providing an oil phase in which the beneficial agent includes an aldehyde-containing fragrance raw material and a ketone-containing fragrance raw material, A step of dissolving or dispersing one or more oil-soluble or oil-dispersible wall monomers in the oil phase, The wall monomer comprises at least 50% by weight of (meth)acrylate monomer, and the (meth)acrylate monomer comprises a polyfunctional aromatic urethane acrylate or polyfunctional urethane acrylate ester, an amine (meth)acrylate, and an acidic (meth)acrylate, and the step of dissolving or dispersing the wall monomer. A step of providing at least one free radical initiator in the oil phase, The steps include: the step of comprising at least one free radical initiator, 2,2'-azobis(2-methylbutyronitrile); A step of providing an aqueous phase comprising an emulsifier or surfactant and at least one other free radical initiator, The steps include: the step of comprising at least one other free radical initiator, 4,4'-azobis(4-cyanovaleric acid); A step of emulsifying the oil phase in the aqueous phase under high shear stirring to form an oil-in-water emulsion containing droplets of the oil phase dispersed in the aqueous phase, A step of reacting the monomer dissolved or dispersed by heating or chemical irradiation of the emulsion, thereby forming a polymer wall at the interface between the droplet and the aqueous phase, and obtaining a delivery particle having the core surrounded by the polymer wall, Multiple free radical initiators constitute 32.3% to 60% by weight of the polymer wall. A method for producing a consumer product composition, which can be obtained by a process comprising the step of providing delivery particles in which the core and the polymer wall are present in a weight ratio of 95:5 to 99.5:0.

5.

11. A method for treating a surface, wherein the method optionally includes the step of bringing the surface into contact with the consumer product composition described in claim 1 or 2, in the presence of water.

Images