Silicone-containing dissolvable solid article

Abstract

Disclosed is a dissolvable solid article formed by a homogenous mixture comprising about 10% to about 50% by weight of the article of a water-soluble polymer, about 5% to about 80% by weight of the article of a surfactant, and about 0.1% to about 40% by weight of the article of a silicone, the silicone having a particle size of about 50 nm to about 25 micrometers. The present invention provides a dissolvable solid article that provides benefits from silicone while avoiding reduced dissolution rate, sticky feeling and / or non-uniform conditioning benefits, silicone staining on substrates such as fabrics, and / or discoloration of the article.

Description

[Technical Field]

[0001] The present invention relates to a dissolvable solid article formed by a homogeneous mixture comprising about 10% to about 50% by weight of the article of a water-soluble polymer, about 5% to about 80% by weight of the article of a surfactant, and about 0.1% to about 40% by weight of the article of a silicone, the silicone having a particle size of about 50 nm to about 25 micrometers. The present invention provides a dissolvable solid article that provides the benefits of silicone while avoiding slow dissolution rate, sticky feeling and / or uneven conditioning benefits, silicone staining on substrates such as fabrics, and / or discoloration of the article. [Background technology]

[0002] Flexible and dissolvable solid articles containing surfactant(s) and / or other active ingredients in a water-soluble polymer carrier or matrix are well known. Such articles are particularly useful for delivering surfactants and / or other active ingredients upon dissolution in water. Compared to traditional granular or liquid forms within the same product category, such articles have better structural integrity, are more concentrated, and are easier to store, transport / ship, carry, and handle. Compared to solid tablet forms within the same product category, such articles can offer faster dissolution and / or more aesthetic appeal to consumers.

[0003] Such dissolving solid articles may contain silicone, for example, to provide conditioning benefits.For example, P&G's US Patent Application Publication No. 2010 / 0291165(A) discloses a foaming personal care article in the form of a porous dissolving solid structure that includes a hydrophobic surface residual coating such as silicone.However, the present inventors have found that such dissolving solid structures that include a silicone surface coating may cause at least one of the following problems: - the uneven distribution of such silicones in the article may result in a sticky feeling and / or uneven conditioning effect on the target substrate, such as hair, and / or may remain as stains on the target substrate, such as fabric; and -Discoloration of such articles due to silicone surface coatings.

[0004] Another example may be P&G's U.S. Patent Application Publication No. 2012 / 270029(A), which relates to a continuous process for making flexible porous dissolvable solid structures. In this publication, Examples 13 and 14 disclose a composition for the process that includes a silicone microemulsion having a dimethiconol particle size of 30 nm. However, the inventors have found that such flexible porous dissolvable solid structures that include a silicone microemulsion having a particle size of 30 nm may cause a decrease in porosity (a decrease in open cell content if the dissolvable solid is characterized as an open cell foam), which reduces the dissolution rate of the solid article. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] U.S. Patent Application Publication No. 2010 / 0291165(A) [Patent Document 2] U.S. Patent Application Publication No. 2012 / 270029(A) Summary of the Invention [Problem to be solved by the invention]

[0006] Thus, there is a need for a dissolvable solid article that provides the benefits of silicone while avoiding slow dissolution rate, sticky feeling and / or uneven conditioning benefits, silicone staining on substrates such as fabrics, and / or discoloration of the article. [Means for solving the problem]

[0007] The present invention provides a dissolvable solid article, the dissolvable solid article comprising: a. about 10% to about 50% by weight of the article of a water-soluble polymer; b. about 5% to about 80% by weight of the article of a surfactant; c. A dissolvable solid article formed by a homogeneous mixture comprising about 0.1% to about 40% by weight of the article of a silicone, the silicone having a particle size of about 50 nm to about 25 micrometers.

[0008] The present invention provides a dissolvable solid article that provides benefits from silicone while avoiding slow dissolution rate, sticky feeling and / or uneven conditioning benefits, silicone staining on substrates such as fabrics, and / or discoloration of the article.

[0009] These and other aspects of the present invention will become more apparent from a reading of the following detailed description. DETAILED DESCRIPTION OF THE INVENTION

[0010] While the specification concludes with claims particularly pointing out and distinctly claiming the invention, it is believed the present invention will be better understood from the following description.

[0011] As used herein, "comprising" means that other steps and other ingredients that do not affect the final result may be added. This term encompasses the terms "consisting of" and "consisting essentially of."

[0012] All percentages, parts and ratios are based on the total weight of the compositions of the present invention unless otherwise specified. All such weights as they pertain to listed ingredients are based on the active level and, therefore, do not include carriers or by-products that may be included in commercially available materials.

[0013] As used herein, "mixture" is meant to include the simple combination of materials and any compounds that may result from such a combination.

[0014] The terms "molecular weight" or "M.Wt." as used herein, unless otherwise specified, refer to weight average molecular weight. Weight average molecular weight can be measured by gel permeation chromatography.

[0015] "QS" means sufficient to make 100%.

[0016] Silicones and silicone emulsions The silicones useful herein have a particle size of about 50 nm to about 25 micrometers, preferably about 80 nm to about 22 micrometers, and more preferably about 100 nm to about 22 micrometers. As used herein, particle size refers to the average particle size by volume. When the dissolvable solid article is characterized by an average cell wall thickness or an average filament diameter, it is preferred that the silicone have a particle size that is at most about 70%, more preferably at most about 50%, and even more preferably at most about 40% of the average cell wall thickness or average filament diameter.

[0017] Silicones are included in the dissolvable solid article at levels of from about 0.1% to about 40% by weight of the article.

[0018] For fabric care, silicones may be preferably included in the dissolvable solid article at a level of from about 0.5% to about 35% by weight of the article.

[0019] For personal care products such as hair shampoos, it may be preferred that the silicone be included in the dissolvable solid article at a level of from 0.1% to 20%, more preferably from about 0.5% to about 15%, and even more preferably from about 1% to about 10% by weight of the article.

[0020] The silicone useful herein can be any one that is commonly used to provide conditioning effect, such as dimethicone, dimethiconol, amodimethicone, and their mixtures.Among these, nonionic and non-amino silicones, such as dimethicone and dimethiconol, that is, silicones that do not contain nitrogen atoms, are preferred.Therefore, the product preferably contains up to about 0.3% nitrogen derived from silicone, preferably up to about 0.2% nitrogen, more preferably about 0.1% or more nitrogen.Most preferably, the product does not contain nitrogen derived from silicone, that is, the product contains 0% nitrogen derived from silicone.

[0021] The silicone is preferably contained as a silicone emulsion in the fluid composition for making the dissolvable solid article. Such a fluid composition for making the dissolvable solid article may, for example, be a. water-soluble polymer, b. surfactants, c. A silicone emulsion, wherein the silicone has a particle size of about 50 nm to about 25 micrometers.

[0022] The levels of the components in such fluid compositions are adjusted so that the components have the levels defined above in the dissolvable solid article. Preferably, such silicone emulsions contain a non-ionic emulsifier.

[0023] Nonionic emulsifiers The dissolvable solid article may contain about a non-ionic emulsifier, particularly when the silicone is contained as a silicone emulsion in the fluid composition for making the dissolvable solid article. Such a non-ionic emulsifier may be contained in the article at a level of 1 to 10% by weight of the silicone. Alternatively, such a non-ionic emulsifier may be contained in the article at a level of about 0.03% to about 6% by weight of the article, preferably about 0.03% to about 4% by weight.

[0024] Examples of such non-ionic emulsifiers include: Alcohol ethoxylates that are the condensation products of aliphatic alcohols having from about 8 to about 18 carbon atoms, either in a straight or branched chain configuration, with from about 2 to about 35 moles of ethylene oxide, such as coconut alcohol ethylene oxide condensates having from about 2 to about 30 moles of ethylene oxide per mole of coconut alcohol (the coconut alcohol fraction having from about 10 to about 14 carbon atoms). Polyethylene oxide condensates of alkylphenols, for example, the condensation products of alkylphenols having alkyl groups containing from about 6 to about 20 carbon atoms, either in a straight or branched chain configuration, with ethylene oxide, the ethylene oxide being present in an amount equivalent to from about 3 to about 60 moles of ethylene oxide per mole of alkylphenol. · derived from the condensation of ethylene oxide with the product resulting from the reaction of propylene oxide and ethylenediamine products. Long-chain dialkyl sulfoxides containing one short-chain alkyl or hydroxyalkyl radical (usually methyl) of about 1 to about 3 carbon atoms and one long hydrophobic chain containing an alkyl, alkenyl, hydroxyalkyl, or ketoalkyl radical containing about 8 to about 20 carbon atoms, 0 to about 10 ethylene oxide moieties, and 0 to about 1 glyceryl moiety. Long-chain tertiary amine oxides, such as those corresponding to the following general formula: R1R2R3N-->O, where R1 contains an alkyl, alkenyl, or monohydroxyalkyl radical of about 8 to about 18 carbon atoms, 0 to about 10 ethylene oxide moieties, and 0 to about 1 glyceryl moiety, and R2 and R3 contain about 1 to about 3 carbon atoms and 0 to about 1 hydroxy group, such as, for example, a methyl, ethyl, propyl, hydroxyethyl, or hydroxypropyl radical (the arrow in the formula represents a semipolar bond).

[0025] In embodiments, the nonionic emulsifier may be a silicone emulsifier. A wide variety of silicone emulsifiers may be useful herein. These silicone emulsifiers are typically organically modified siloxanes, also known to those skilled in the art as silicone surfactants. Useful silicone emulsifiers include dimethicone copolyols. These materials are polydimethylsiloxanes modified to include polyether side chains, such as polyethylene oxide chains, polypropylene oxide chains, mixtures of these chains, and polyether chains containing moieties derived from both ethylene oxide and propylene oxide. Other examples include alkyl-modified dimethicone copolyols, i.e., compounds containing C2-C30 pendant side chains. Still other useful dimethicone copolyols include materials with a variety of cationic, anionic, amphoteric, and zwitterionic pendant moieties.

[0026] In one embodiment, the nonionic emulsifier may have a hydrocarbon chain length of from about 16 to about 20 carbon atoms and from about 20 to about 25 moles of ethoxylate.

[0027] In one embodiment, the nonionic emulsifier may have a hydrocarbon chain length of from about 19 to about 11, alternatively from about 9 to about 11, carbon atoms, and from about 2 to about 4 moles of ethoxylate.

[0028] In one embodiment, the nonionic emulsifier may include a combination of (a) a nonionic emulsifier having a branched hydrocarbon chain having a length of about 11 to about 15 carbon atoms and about 5 to about 9 moles of ethoxylates, and (b) a nonionic emulsifier having a hydrocarbon chain having a length of about 11 to about 13 carbon atoms and about 9 to about 12 moles of ethoxylates.

[0029] Water-soluble polymers ("polymer structuring agents") The present invention includes water-soluble polymers that function as structuring agents. The water-soluble polymer is present in the article at a level of about 10% to about 50% by weight, preferably about 15% to about 40% by weight, and more preferably about 18% to about 30% by weight. As used herein, the term "water-soluble polymer" is broad enough to encompass both water-soluble and water-dispersible polymers and is defined as a polymer having a solubility in water of at least about 0.1 grams per liter (g / L), measured at 25°C. In some embodiments, the polymer has a solubility in water of about 0.1 grams per liter (g / L) to about 500 grams per liter (g / L), measured at 25°C (which indicates the formation of a macroscopically isotropic or clear, colored or colorless solution). The polymers used to create these solids may be synthetically or naturally derived and may be modified by chemical reaction. They may or may not be film-forming. These polymers should be physiologically acceptable. That is, the polymer should be compatible with the skin, mucous membranes, hair, and scalp.

[0030] The terms "water-soluble polymer" and "polymeric structurant" are used interchangeably herein. Furthermore, whenever the singular term "polymer" is mentioned, it should be understood that this term is broad enough to include one polymer or a mixture of more than one polymer. For example, if a mixture of polymers is used, the polymer solubility referred to herein will refer to the solubility of the mixture of polymers, rather than the individual solubility of each polymer.

[0031] The one or more water-soluble polymers of the present invention are selected so that they have a weight average molecular weight of from about 40,000 to about 500,000, in one embodiment from about 50,000 to about 400,000, in yet another embodiment from about 60,000 to about 300,000, and in yet another embodiment from about 70,000 to about 200,000. The weight average molecular weight is calculated by adding the average molecular weight of each polymer raw material and multiplying by their relative weight percentages by weight of the total weight of polymers present in the porous solid.

[0032] As shown below, a wide variety of water-soluble polymers can be used in the present invention, of which polyvinyl alcohol is highly preferred.

[0033] The water soluble polymer(s) of the present invention may include, but are not limited to, synthetic polymers comprising polyvinyl alcohol, polyvinylpyrrolidone, polyalkylene oxide, polyacrylate, caprolactam, polymethacrylate, polymethyl methacrylate, polyacrylamide, polymethyl acrylamide, polydimethyl acrylamide, copolymers of acrylic acid and methyl methacrylate, polyethylene glycol monomethacrylate, polyurethane, polycarboxylic acid, polyvinyl acetate, polyester, polyamide, polyamine, polyethyleneimine, maleic acid / (acrylate or methacrylate) copolymer, copolymer of methyl vinyl ether and maleic anhydride, copolymer of vinyl acetate and crotonic acid, copolymer of vinylpyrrolidone and vinyl acetate, copolymer of vinylpyrrolidone and caprolactam, copolymer of vinylpyrrolidone / vinyl acetate, copolymers of anionic, cationic and amphoteric monomers, and combinations thereof.

[0034] The water-soluble polymer(s) of the present invention may also be selected from polymers of natural origin, including those of plant origin, with examples such as karaya gum, tragacanth gum, gum arabic, acemannan, konjac mannan, acacia gum, ghatti gum, whey protein isolate, and soy protein isolate; seed extracts, including guar gum, locust bean gum, quince seed, and psyllium seed; seaweed extracts, such as carrageenan, alginic acid, and agar-agar; fruit extracts (pectins); those of microbial origin, including xanthan gum, gellan gum, pullulan, hyaluronic acid, chondroitin sulfate, and dextran; and those of animal origin, including casein, gelatin, keratin, keratin hydrolysate, keratin sulfonate, albumin, collagen, glutelin, glucagon, gluten, zein, and shellac.

[0035] Modified natural polymer(s) may also be useful as the water-soluble polymer in the present invention. Suitable modified natural polymers include, but are not limited to, cellulose derivatives such as hydroxypropyl methylcellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, methyl cellulose, hydroxypropyl cellulose, ethyl cellulose, carboxymethyl cellulose, cellulose acetate phthalate, nitrocellulose and other cellulose ethers / esters, and guar derivatives such as hydroxypropyl.

[0036] Suitable water-soluble polymers of the present invention include polyvinyl alcohol, polyvinylpyrrolidone, polyalkylene oxides, starch and starch derivatives, pullulan, gelatin, hydroxypropylmethylcellulose, methycelluloses, and carboxymethycelluloses.

[0037] More preferred water-soluble polymers of the present invention include polyvinyl alcohol and hydroxypropyl methylcellulose.Suitable polyvinyl alcohols include those available under the trade name Celvol from Celanese Corporation (Dallas, TX), including but not limited to Celvol 523, Celvol 530, Celvol 540, Celvol 518, Celvol 513, Celvol 508, Celvol 504, and combinations thereof.Suitable hydroxypropyl methylcelluloses include those available under the trade name Methocel from Dow Chemical Company (Midland, MI), including but not limited to Methocel E50, Methocel E15, Methocel E6, Methocel E5, Methocel E3, Methocel F50, Methocel K100, Methocel K3, Methocel A400, and combinations thereof, including combinations with the above-mentioned hydroxypropyl methylcellulose.

[0038] The most preferred water-soluble polymer of the present invention is polyvinyl alcohol characterized by a degree of hydrolysis ranging from about 40% to about 100%, preferably from about 50% to about 95%, more preferably from about 70% to about 92%, and most preferably from about 80% to about 90%. Commercially available polyvinyl alcohols include those sold under the tradename CELVOL from Celanese Corporation (Texas, USA), including, but not limited to, CELVOL 523, CELVOL 530, CELVOL 540, CELVOL 518, CELVOL 513, CELVOL 508, and CELVOL 504; those sold under the tradenames Mowiol® and POVAL™ from Kuraray Europe GmbH (Frankfurt, Germany); and PVA 1788 (also referred to as PVA BP17), available from various suppliers including Lubon Vinylon Co. (Nanjing, China), such as BP-17 having a degree of hydrolysis of 86-90% and an approximate MW (weight average) of 70,000-120,000 Daltons, available from Liwei Chemical Co. Ltd. (China), and combinations thereof. In a particularly preferred embodiment of the present invention, the flexible porous dissolvable solid sheet article comprises from about 10% to about 25%, more preferably from about 15% to about 23%, by weight of the total weight of such article of polyvinyl alcohol having a weight average molecular weight in the range of 80,000 to about 150,000 daltons and a degree of hydrolysis in the range of about 80% to about 90%.

[0039] surfactants The dissolvable solid article of the present invention comprises a surfactant. The surfactant is present in the article at a level of about 5% to about 80% by weight of the article, preferably about 10% to about 75% by weight, more preferably about 20% to about 70% by weight, and even more preferably about 30% to about 65% by weight. The surfactant is preferably selected from the group consisting of anionic surfactants, amphoteric surfactants, zwitterionic surfactants, and mixtures thereof.

[0040] Preferably, the surfactant comprises a blend of Group I surfactants and Group II surfactants. Surfactant blends useful herein include one or more surfactants from Group I and one or more surfactants from Group II. Group I surfactants include anionic surfactants, while Group II surfactants include amphoteric surfactants, zwitterionic surfactants, and combinations thereof. In one embodiment of the present invention, the ratio of Group I surfactants to Group II surfactants is from about 90:10 to about 55:45. In yet another embodiment of the present invention, the ratio of Group I surfactants to Group II surfactants is from about 85:15 to about 65:35.

[0041] Group I Surfactants The Group I surfactants of the present invention include one or more anionic surfactants. Suitable anionic surfactant components for use in the dissolvable articles herein include those known for use in hair care or other personal care cleansing compositions. The concentration of the anionic surfactant component in the composition should be sufficient to provide the desired cleaning and lathering performance, ranging from about 6.5% to about 71% by weight of the dry solids of the Group I surfactant.

[0042] Suitable anionic surfactants for use in the composition include sulfate-free surfactants.Such sulfate-free surfactants can include materials derived from amino acids, such as monocarboxylic acid salts and dicarboxylic acid salts, such as glutamate, glycinate, taurate, alanine salt or sarcosinate.Examples include sodium lauroyl glutamate, sodium cocoyl glutamate, potassium lauroyl glutamate, sodium cocoyl alanine salt, sodium cocoyl glycinate, sodium lauroyl sarcosinate, sodium cocoyl sarcosinate, sodium cocoyl methyl taurate, sodium lauryl methyl isethionate, sodium cocoyl isethionate or sodium oleoyl sarcosinate.

[0043] Anionic surfactants suitable for use in the present compositions include alkyl sulfates and alkyl ether sulfates. These materials have the formula ROSO3M and RO(C2H4O)xSO3M, respectively, where R is an alkyl or alkenyl group of about 8 to about 18 carbon atoms, x is an integer having a value from 1 to 10, and M is a cation such as ammonium, an alkanolamine such as triethanolamine, a monovalent metal such as sodium and potassium, or a polyvalent metal cation such as magnesium and calcium. Preferably, R, in both the alkyl and alkyl ether sulfates, has about 8 to about 18 carbon atoms, more preferably about 10 to about 16 carbon atoms, and even more preferably about 11 to about 14 carbon atoms. Alkyl ether sulfates are typically made as the condensation product of ethylene oxide and a monohydric alcohol having about 8 to about 24 carbon atoms. The alcohol can be synthetic or derived from fats, such as coconut oil, palm kernel oil, or tallow. Synthetic alcohols include grades commercially available from Shell Chemical Co. under the NEODOL trademark: NEODOL 91 (C9-11 alcohol), NEODOL 23 (C12-13 alcohol), NEODOL 25 (C12-15 alcohol), NEODOL 45 (C14-15 alcohol), and NEODOL 135 (C11-C13-C15 alcohol). Lauryl alcohol and straight-chain alcohols derived from coconut oil or palm kernel oil are preferred. Such alcohols are reacted with ethylene oxide in a molar ratio of about 0 to about 10, in one embodiment about 2 to about 5, and in another embodiment about 3, and the resulting mixture of molecular species, e.g., having an average of 3 moles of ethylene oxide per mole of alcohol, is sulfated and neutralized.

[0044] Other suitable anionic surfactants are the water-soluble salts of organic sulfuric acid reaction products conforming to the formula [R1-SO3-M], where R1 is a straight- or branched-chain saturated aliphatic hydrocarbon radical having from about 8 to about 24, preferably from about 10 to about 18, carbon atoms, and M is a cation as described above.

[0045] Still other suitable anionic surfactants are the reaction products of fatty acids esterified with isethionic acid and neutralized with sodium hydroxide, for example, the fatty acid is derived from coconut oil or palm kernel oil, for example, the sodium or potassium salt of fatty acid amide of methyl tauride derived from coconut oil or palm kernel oil.Other similar anionic surfactants are described in U.S. Patent Nos. 2,486,921, 2,486,922, and 2,396,278.

[0046] Other anionic surfactants suitable for use in the present compositions are succinates, examples of which include disodium N-octadecyl sulfosuccinate, disodium lauryl sulfosuccinate, diammonium lauryl sulfosuccinate, tetrasodium N-(1,2-dicarboxyethyl)-N-octadecyl sulfosuccinate, diamyl ester of sodium sulfosuccinate, dihexyl ester of sodium sulfosuccinate, and dioctyl ester of sodium sulfosuccinate.

[0047] Other suitable anionic surfactants include olefin sulfonates having from about 10 to about 24 carbon atoms. In addition to true alkene sulfonates and certain hydroxyalkane sulfonates, olefin sulfonates may contain small amounts of other materials, such as alkene disulfonates, depending on the reaction conditions, the ratio of reactants, the nature of the starting olefin and impurities in the olefin feedstock, and side reactions during the sulfonation process. Non-limiting examples of such alpha-olefin sulfonate mixtures are described in U.S. Pat. No. 3,332,880.

[0048] Another class of anionic surfactants suitable for use in the present compositions are the beta-alkyloxyalkanesulfonates. These surfactants have the formula:

[0049] [ka] wherein R1 is a linear alkyl group having from about 6 to about 20 carbon atoms, R2 is a lower alkyl group having from about 1 to about 3 carbon atoms, preferably 1 carbon atom, and M is a water-soluble cation as described above.

[0050] Additional anionic surfactants suitable for use in the present compositions include ammonium lauryl sulfate, ammonium laureth sulfate, ammonium laureth-1 sulfate, ammonium laureth-2 sulfate, ammonium laureth-3 sulfate, triethanolamine lauryl sulfate, triethanolamine laureth sulfate, triethanolamine laureth-1 sulfate, triethanolamine laureth-2 sulfate, triethanolamine laureth-3 sulfate, monoethanolamine lauryl sulfate, monoethanolamine laureth sulfate, diethanolamine lauryl sulfate, diethanolamine laureth sulfate, lauric monoglyceride sodium sulfate, sodium lauryl sulfate, laureth sulfate. sodium lauryl sulfate, potassium laureth sulfate, sodium lauryl sarcosinate, sodium lauroyl sarcosinate, lauryl sarcosine, cocoyl sarcosine, ammonium cocoyl sulfate, ammonium lauroyl sulfate, sodium cocoyl sulfate, sodium lauroyl sulfate, potassium cocoyl sulfate, potassium lauryl sulfate, monoethanolamine cocoyl sulfate, monoethanolamine lauryl sulfate, sodium tridecylbenzenesulfonate, sodium dodecylbenzenesulfonate, sodium cocoyl isethionate, ammonium decyl sulfate, sodium decyl sulfate, ammonium undecyl sulfate, and ammonium undecyl sulfate, and combinations thereof.

[0051] In one embodiment of the present invention, one or more of the surfactants is an alkyl sulfate. In one embodiment, the one or more alkyl sulfates have an average molar ethoxylation of about 0.0 to about 1.9; in another embodiment, the one or more alkyl sulfates have an average molar ethoxylation of about 0.0 to about 1.5; and in yet another embodiment, the one or more alkyl sulfates have an average molar ethoxylation of about 0.0 to about 1.0. In one embodiment, the one or more alkyl sulfates comprise an ammonium counterion. Suitable examples of such surfactants with an ammonium counterion include, but are not limited to, ammonium lauryl sulfate, ammonium laureth-1 sulfate, ammonium laureth-2 sulfate, and combinations thereof.

[0052] In one embodiment, the one or more Group I surfactants have the following structure:

[0053] [ka] wherein R 1 is selected from C-bonded monovalent substituents selected from the group consisting of substituted or unsubstituted straight or branched chain alkyl or unsaturated alkyl systems containing an average of 9.0 to 11.9 carbon atoms; R 2 is selected from the group consisting of C-bonded divalent straight or branched chain alkyl systems containing 2 to 3 carbon atoms, M +is a monovalent counterion selected from sodium, ammonium, or protonated triethanolamine, and x is 0.0 to 3.0. In one embodiment, one or more of the alkyl sulfate surfactants according to the above structure contain an average number of moles of ethoxylation of about 0.0 to about 1.9; in another embodiment, the alkyl sulfate surfactants according to the above structure contain an average number of moles of ethoxylation of about 0.0 to about 1.5; and in yet another embodiment, the alkyl sulfate surfactants according to the above structure contain an average number of moles of ethoxylation of about 0.0 to about 1.0. Suitable examples include ammonium decyl sulfate, sodium decyl sulfate, ammonium undecyl sulfate, sodium undecyl sulfate, triethanolamine decyl sulfate, or triethanolamine undecyl sulfate. In one embodiment, the anionic surfactant of the present invention comprises ammonium undecyl sulfate.

[0054] Group II Surfactants The Group II surfactants of the present invention include one or more amphoteric surfactants, zwitterionic surfactants, and / or combinations thereof. Suitable amphoteric or zwitterionic surfactants for use in the compositions herein include those known for use in hair care or other personal care cleansing applications. The concentration of such amphoteric, zwitterionic, and / or combinations thereof ranges from about 1.0% to about 52.5% by weight of dry solids. Non-limiting examples of suitable zwitterionic or amphoteric surfactants are described in U.S. Patent Nos. 5,104,646 (Bolich Jr. et al.) and 5,106,609 (Bolich Jr. et al.).

[0055] Amphoteric surfactants suitable for use in the present compositions are well known in the art and include surfactants broadly described as derivatives of aliphatic secondary and tertiary amines, the aliphatic radical of which can be straight or branched, one of the aliphatic substituents containing from about 8 to about 18 carbon atoms and one containing an anionic group such as carboxy, sulfonate, sulfate, phosphate, or phosphonate. Suitable examples of such amphoteric surfactants include sodium cocaminopropionate, sodium cocaminodipropionate, sodium cocoamphoacetate, sodium cocoamphohydroxypropylsulfonate, sodium cocoamphopropionate, sodium cornamphopropionate, sodium lauraminopropionate, sodium lauroamphoacetate, sodium lauroamphohydroxypropylsulfonate, sodium lauroamphopropionate, sodium cornamphopropionate.cornamphopropionate), sodium lauriminodipropionate, ammonium cocaminopropionate, ammonium cocaminodipropionate, ammonium cocoamphoacetate, ammonium cocoamphohydroxypropylsulfonate, ammonium cocoamphopropionate, ammonium cornamphopropionate, ammonium lauraminopropionate, ammonium lauroamphoacetate, ammonium lauroamphohydroxypropylsulfonate, ammonium lauroamphopropionate, ammonium cornamphopropionate, ammonium lauriminodipropionate, triethanolamine cocaminopropionate, triethanolamine cocaminodipropionate, tricoamphoacetate Ethanolamine, Triethanolamine Cocoamphohydroxypropylsulfonate, Triethanolamine Cocoamphopropionate, Triethanolamine Cornamphopropionate, Triethanolamine Lauraminopropionate, Triethanolamine Lauroamphoacetate, Triethanolamine Lauroamphohydroxypropylsulfonate, Triethanolamine Lauroamphopropionate, Triethanolamine Cornamphopropionate, Triethanolamine Lauraminodipropionate, Cocoamphodipropionic acid, Disodium Caproamphodiacetate, Disodium Caproamphodipropionate, Disodium Capryloamphodiacetate, Disodium Capryloamphodipropionate capryloamphodipriopionate), disodium cocoamphocarboxyethyl hydroxypropyl sulfonate, disodium cocoamphodiacetate, disodium cocoamphodipropionate, disodium dicarboxyethyl cocopropylenediamine, disodium laureth-5 carboxyamphodiacetate, disodium lauriminodipropionate, disodium lauroamphodiacetate, disodium lauroamphodipropionate, disodium oleoamphodipropionate, PPG-2-isodecethy-7 carboxyamphodiacetate, lauraminopropionic acid, lauroamphodipropionic acid, laurylaminopropylglycine, lauryldiethylenediaminoglycine, and combinations thereof.

[0056] In one embodiment, the amphoteric surfactant has the following structure:

[0057] [ka] wherein R1 is a C-bonded monovalent substituent selected from the group consisting of substituted alkyls containing 9 to 15 carbon atoms, unsubstituted alkyls containing 9 to 15 carbon atoms, linear alkyls containing 9 to 15 carbon atoms, branched alkyls containing 9 to 15 carbon atoms, and unsaturated alkyls containing 9 to 15 carbon atoms; R2, R3, and R4 are each independently selected from the group consisting of C-bonded divalent linear alkyls containing 1 to 3 carbon atoms and C-bonded divalent branched alkyls containing 1 to 3 carbon atoms; and M+ is a monovalent counterion selected from the group consisting of sodium, ammonium, and protonated triethanolamine. Specific examples of suitable surfactants include sodium cocoamphoacetate, sodium cocoamphodiacetate, sodium lauroamphoacetate, sodium lauroamphodiacetate, ammonium lauroamphoacetate, ammonium cocoamphoacetate, triethanolamine lauroamphoacetate, and triethanolamine cocoamphoacetate.

[0058] Zwitterionic surfactants suitable for use in the present compositions are well known in the art and include surfactants broadly described as derivatives of aliphatic quaternary ammonium, phosphonium, and sulfonium compounds, in which the aliphatic radicals may be straight or branched chain, and in which one of the aliphatic substituents contains from about 8 to about 18 carbon atoms and one contains an anionic group, such as carboxy, sulfonate, sulfate, phosphate, or phosphonate. Suitable zwitterionic surfactants include, but are not limited to, cocamidoethyl betaine, cocamidopropylamine oxide, cocamidopropyl betaine, cocamidopropyl dimethylaminohydroxypropyl hydrolyzed collagen, cocamidopropyl dimonium hydroxypropyl hydrolyzed collagen, cocamidopropyl hydroxysultaine, cocobetaineamide amphopropionate, coco-betaine, coco-hydroxysultaine, coco / oleamidopropyl betaine, coco-sultaine, lauramidopropyl betaine, lauryl betaine, lauryl hydroxysultaine, lauryl sultaine, and combinations thereof.

[0059] Other surfactants The compositions of the present invention may contain other surfactants, selected from the group consisting of anionic surfactants, amphoteric surfactants, zwitterionic surfactants, and mixtures thereof, for use in combination with or separately from the preferred surfactants described above. Suitable other surfactants include nonionic surfactants and cationic surfactants. Any such surfactants known in the art for use in hair or personal care products may be used, provided that the optional additional surfactants are chemically and physically compatible with the essential components of the composition or do not otherwise unduly impair product performance, aesthetics, or stability. The concentration of the optional additional surfactant in the composition may vary depending on the desired cleansing or foaming performance, the selected optional surfactant, the desired product concentration, the presence of other components in the composition, and other factors well known in the art.

[0060] Non-limiting examples of other anionic, zwitterionic, amphoteric, or optional additional surfactants suitable for use in the compositions are described in McCutcheon's, Emulsifiers and Detergents, 1989 Annual, published by MC Publishing Co., and U.S. Pat. Nos. 3,929,678, 2,658,072, 2,438,091, and 2,528,378.

[0061] plasticizer The dissolvable solid article of the present invention may further comprise a water-soluble plasticizer suitable for use in personal care compositions. The water-soluble plasticizer may be included in the article at a level of about 0.1% to about 25% by weight of the article. Non-limiting examples of suitable plasticizers include polyols, copolyols, and polyesters. Examples of useful polyols include, but are not limited to, glycerin, diglycerin, propylene glycol, ethylene glycol, butylene glycol, pentylene glycol, polyethylene glycol (200-600), polyhydric low molecular weight alcohols (e.g., C2-C8 alcohols), mono-, di-, and oligosaccharides such as fructose, glucose, sucrose, maltose, lactose, and high fructose corn syrup solids.

[0062] Optional Ingredients The dissolvable solid article may further comprise other optional ingredients as are known or useful for use in compositions, provided that such optional materials are compatible with the selected essential materials described herein or do not otherwise unduly impair product performance.

[0063] Such optional ingredients are most typically substances approved for use in cosmetics and described in references such as the CTFA Cosmetic Ingredient Handbook, Second Edition, The Cosmetic, Toiletries, and Fragrance Association, Inc. 1988, 1992.

[0064] Suitable emulsifiers as optional ingredients herein include mono- and diglycerides, fatty alcohols, polyglycerol esters, propylene glycol esters, sorbitan esters, and other known emulsifiers or emulsifiers otherwise commonly used to stabilize air interfaces, such as those used in the preparation of aerated food products such as cakes and other baked goods and confectionery products, or in the stabilization of cosmetic products such as hair mousses.

[0065] Further non-limiting examples of such optional ingredients include preservatives, fragrances or fragrances, colorants or dyes, conditioning agents, hair bleaches, thickeners, moisturizers, emollients, pharmaceutical actives, vitamins or nutrients, sunscreens, deodorants, sensates, botanical extracts, nutrients, astringents, cosmetic particles, absorbent particles, adhesive particles, hair fixatives, fibers, reactive agents, skin lightening agents, skin tanning agents, anti-dandruff agents, fragrances, stripping agents, acids, bases, moisturizers, enzymes, suspending agents, pH adjusters, hair colorants, hair perm agents, pigment particles, anti-acne agents, antimicrobial agents, antibacterial agents, sunscreens, tanning agents, exfoliating particles, hair thickening or growth agents, insect repellents, shaving lotions, co-solvents or other additional solvents, and other similar materials.

[0066] soluble solid articles The dissolvable solid article of the present invention is formed by a homogeneous mixture containing a silicone. Preferably, the dissolvable solid article of the present invention does not include a silicone surface coating.

[0067] The dissolvable solid article, when dissolved in water, has a pH of about 3 to about 8, preferably about 5 to about 7.5.

[0068] As used herein, the term "solid" refers to the ability of an article to substantially retain its shape (i.e., without any visible change in its shape) at 20°C and under atmospheric pressure when no external force is applied to the article.

[0069] As used herein, the term "flexible" refers to the ability of an article to withstand stress when bent 90° along a centerline perpendicular to its length without fracture or significant disruption. Preferably, such articles are capable of undergoing significant elastic deformation and are characterized by a Young's modulus of 5 GPa or less, preferably 1 GPa or less, more preferably 0.5 GPa or less, and most preferably 0.2 GPa or less.

[0070] The dissolvable solid articles useful herein can be dissolved in a liquid, particularly an aqueous carrier, more particularly water. For each part of the article, from about 1100 parts to about 50 parts, preferably from about 10 to about 40 parts, of water can be added.

[0071] As used herein, "soluble" means that the dissolvable solid article dissolves completely in water or that it provides a uniform dispersion when mixed in water according to the Hand Dissolution Test. The dissolvable solid article has a hand dissolution value of about 0 to about 30 strokes, alternatively about 0 to about 25 strokes, alternatively about 0 to about 20 strokes, and alternatively about 0 to about 15 strokes, as measured by the Hand Dissolution Method. "0 strokes" means that the article dissolves upon the addition of water alone without any shear or manual strokes.

[0072] The dissolvable solid article is preferably porous and has a density of 0.050 g / cm 3 ~ approx. 0.4g / cm 3 , preferably 0.06 g / cm 3 ~0.3g / cm 3 , more preferably 0.07 g / cm 3 ~0.2g / cm 3, most preferably 0.08 g / cm 3 ~0.15g / cm 3 The dissolvable solid structures of the present invention may be provided in the form of a dissolvable solid article comprising one or more flexible dissolvable porous sheets, each of which may be characterized by an open-cell foam, a fibrous structure, or the like. The porous sheets may optionally be bonded together via bonding means (e.g., heat, moisture, ultrasound, pressure, and the like).

[0073] As used herein, the terms "open-cell foam" or "open-cell pore structure" refer to a solid interconnected polymer-containing matrix that defines a network of voids or cells that contain a gas, typically a gas (such as air), and that maintain the physical strength and cohesiveness of the solid. The interconnectedness of the structure can be described by the open cell content, as measured by Test 1 disclosed below. Dissolvable solid articles useful herein can be characterized by an open cell content of 80% to 100%.

[0074] Hand dissolution test method Required materials: Dissolvable solid structures to be tested: 3-5 dissolvable solid structures (final product samples) are tested and the average number of strokes for each individual dissolvable solid structure sample is calculated and recorded as the average hand dissolvability value for the dissolvable solid structure. For this method, the consumer saleable dissolvable solid structure or the entire consumer dissolvable solid structure is tested. The consumer saleable dissolvable solid structure or the entire consumer dissolvable solid structure is tested in a 5cm 2 If the footprint exceeds 5cm, 2 The dissolvable solid structure is cut to have a footprint of

[0075] Nitrile gloves 5mL syringe Plastic weighing boat (approximately 3 inches by 3 inches) 50mL glass beaker Water (Singapore city water or equivalent with the following characteristics: total hardness = 64 mg / L (as CaCO2); calcium content = 23 mg / L; magnesium content = 1.58 mg / L; phosphate content = 0.017 mg / L) The water used has a hardness of 3 gpg and a temperature of 23°C + / - 2°C.

[0076] protocol: · Add 10 mL of water to a glass beaker. · Cool the water in the beaker until the water is at a temperature of 23°C + / - 2°C. Transfer 4 mL of water from the beaker via syringe into a weigh boat. Within 10 seconds of transferring the water to the weigh boat, place the dissolvable solid structure sample in the palm of your gloved hand (your non-dominant hand will be cupped to hold the dissolvable solid structure sample). Using your dominant hand, quickly add water from the weigh boat to the soluble solid structure sample, allowing it to immediately wet for 5-10 seconds. Using your opposite, dominant hand (also gloved), rub with two rapid circular strokes. After two strokes, visually inspect the dissolvable solid structure sample in your hand. If the dissolvable solid structure sample is completely dissolved, record the number of strokes = 2 dissolving strokes. If not completely dissolved, rub the remaining dissolvable solid structure sample with two more circular strokes (for a total of four) and observe the degree of dissolution. If the dissolvable solid structure sample does not contain any solid pieces after two more strokes, record the number of strokes = 4 dissolving strokes. If the dissolvable solid structure sample still contains solid pieces of the dissolvable solid structure sample that have not dissolved after a total of four strokes, continue to rub the remaining dissolvable solid structure sample with two more circular strokes until the dissolvable solid structure sample is completely dissolved or until a total of 30 strokes is reached, whichever comes first, and check whether any solid pieces of the dissolvable solid structure sample remain after each additional two strokes. Record the total number of strokes. Record 30 dissolving strokes even if solid dissolvable solid structure sample pieces remain after the maximum of 30 strokes. Repeat this process for each of the four more dissolvable solid structure samples. Calculate the arithmetic mean of the recorded dissolution stroke values ​​for the five individual dissolvable solid structure samples and record this as the mean hand dissolution value for the dissolvable solid structure. Report the mean hand dissolution value to the nearest single dissolution stroke unit.

[0077] Test 1: Open Cell Content of Sheet Article Open cell content is measured by gas pycnometry. Gas pycnometry is a common analytical technique that uses gas displacement to accurately measure volume. An inert gas, such as helium or nitrogen, is used as the displacement medium. A sample of the solid sheet article of the present invention is sealed in an instrument compartment of known volume, filled with the appropriate inert gas, and then expanded to another precise internal volume. The pressure before and after expansion is measured and used to calculate the volume of the sample article.

[0078] ASTM Standard Test Method D6226 or ASTM Standard Test Method 2856 provides a procedure for determining the percentage of open cell using an older model air comparison pycnometer. This device is no longer manufactured. However, tests using a Micromeritics AccuPyc pycnometer can be performed to conveniently and precisely determine the percentage of open cell. ASTM Procedure D2856 describes five methods (A, B, C, D, and E) for determining the open cell percentage of foamed materials. For these experiments, nitrogen gas can be used, and the Accupyc 1340 can be used to analyze samples with ASTM foampyc software. ASTM Procedure Method C should be used to calculate the percent open cell. This method simply compares the geometric volume determined using calipers and standard volume calculations to the open cell volume measured by the Accupyc according to the following equation: Percent open cell = open cell volume of sample / geometric volume of sample * 100

[0079] It is recommended that these measurements be performed by Micromeretics Analytical Services, Inc., One Micromeritics Dr, Suite 200, Norcross, GA 30093. More information about this technique is available on the Micromeretics Analytical Services website (www.particletesting.com or www.micromeritics.com) or published in "Analytical Methods in Fine Particle Technology" by Clyde Orr and Paul Webb.

[0080] The dissolvable solid article may be characterized by a total average pore size of 100 μm to 2000 μm, as measured by the micro-CT method described below in Test 2. The total average pore size defines the porosity of the dissolvable solid article.

[0081] The dissolvable solid article may be characterized by an average cell wall thickness or average filament diameter of from 1 μm to 200 μm, preferably from 10 μm to 100 μm, more preferably from 20 μm to 80 μm, and even more preferably from about 25 μm to 60 μm, as measured by Test 2 below.

[0082] Test 2: Micro-Computed Tomographic (μCT) Method for Determining Whole-Body or Regional Average Pore Size and Average Cell Wall Thickness of Open Cell Foam (OCF) Porosity is the ratio of void space to the total space occupied by the OCF. Porosity can be calculated from μCT scans by segmenting the void space by thresholding and determining the ratio of void voxels to total voxels. Similarly, solid volume fraction (SVF) is the ratio of solid space to total space, and SVF can be calculated as the ratio of occupied voxels to total voxels. Both porosity and SVF are average scalar values ​​that do not provide structural information such as the pore size distribution across the height of the OCF or the average cell wall thickness of the OCF struts.

[0083] To characterize the 3D structure of the OCF, the sample is imaged using a μCT X-ray scanning device capable of acquiring datasets with high isotropic spatial resolution. An example of a suitable instrument is a SCANCO System Model 50 μCT scanner (Scanco Medical AG, Bruttisellen, Switzerland) operating with the following settings: 45 kVp energy level at 133 μA; 3000 projections; 15 mm field of view; 750 ms integration time; 5 averaging; and a voxel size of 3 μm per pixel. After scanning and subsequent data reconstruction are complete, the scanner system creates a 16-bit dataset called an ISQ file, in which gray levels reflect changes in X-ray attenuation and are therefore related to material density. The ISQ file is then converted to 8 bits using a scaling factor.

[0084] Scanned OCF samples are typically prepared by drilling a core approximately 14 mm in diameter. The OCF punch is placed flat on a low-damping foam and then attached to a 15 mm diameter plastic cylindrical tube for scanning. Scans of the sample are acquired so that the entire volume of all attached cut samples is included in the dataset. From this larger dataset, smaller subvolumes of the sample dataset are extracted from the total cross-section of the scanned OCF to create a 3D data slab, where pores can be qualitatively evaluated without edge / boundary effects.

[0085] To characterize the pore size distribution in the elevation direction, a strut size local thickness map algorithm, or LTM, is implemented on the subvolume dataset. The LTM method begins with Euclidean Distance Mapping (EDM), assigning each void voxel a gray-level value equal to its distance from its nearest boundary. Based on the EDM data, the 3D void space representing the pores (or the 3D solid space representing the struts) is tessellated with spheres sized to match the EDM values. Voxels enclosed by the spheres are assigned the radius value of the largest sphere. In other words, each void voxel (or strut solid voxel) is assigned the radial value of the largest sphere that both fits within the void space boundary (or strut solid space boundary) and contains the assigned voxel.

[0086] The 3D labeled sphere distribution output from the LTM data scan is processed as a stack of two-dimensional images in the height direction (or Z direction) and can be used to estimate the slice-to-slice change in sphere diameter as a function of OCF depth. Strut thickness is processed as a 3D data set, and average values ​​can be evaluated for all or part of the subvolume. Calculations and measurements were performed using Thermo Fisher Scientific's AVIZO Lite (9.2.0) and Mathworks' MATLAB (R2017a).

[0087] The soluble solid article has a viscosity of 0.03 m, as measured by Test 3 described below. 2 / g~0.25m 2 / g, preferably 0.04m 2 / g~0.22m 2 / g, more preferably 0.05m 2 / g~0.2m 2 / g, most preferably 0.1m 2 / g~0.18m 2The specific surface area of ​​the solid sheet of the present invention can indicate its porosity and can affect its dissolution rate, e.g., the larger the specific surface area, the more porous the sheet and the faster its dissolution rate.

[0088] Test 3: Specific surface area of ​​sheet article The specific surface area of ​​flexible porous soluble solid sheet articles is measured via a gas adsorption technique. Surface area is a measurement of the exposed surface of a solid sample on a molecular scale. BET (Brunauer, Emmett, and Teller) theory is the most well-known model used to determine surface area and is based on gas adsorption isotherms. Gas adsorption uses physical adsorption and capillary condensation to measure gas adsorption isotherms. This technique is summarized by the following steps: The sample is placed in a sample tube and heated under vacuum or gas flow to remove contaminants on the sample's surface. The sample weight is obtained by subtracting the empty sample tube weight from the combined weight of the degassed sample and sample tube. The sample tube is then placed on the analysis port and the analysis begins. The first step in this analysis process is to evacuate the sample tube and then measure the free space volume within the sample tube using helium gas at liquid nitrogen temperature. The sample is then evacuated again and the helium gas is removed. The instrument then begins collecting the adsorption isotherm by dosing krypton gas at user-specified intervals until the required pressure measurement is achieved. The samples may then be analyzed using an ASAP 2420 with krypton gas adsorption. It is recommended that these measurements be performed by Micromeretics Analytical Services, Inc. (One Micromeritics Dr, Suite 200, Norcross, GA 30093). More information about this technique is available on the Micromeretics Analytical Services website (www.particletesting.com or www.micromeritics.com) or published in the book "Analytical Methods in Fine Particle Technology" by Clyde Orr and Paul Webb.

[0089] Dissolvable solid articles can be characterized by a final moisture content of 0.5% to 25%, preferably 1% to 20%, and more preferably 3% to 10% by weight of the article, as measured by Test 4 below. An appropriate final moisture content in the resulting solid sheet can ensure the desired flexibility / deformability of the sheet and provide a soft / smooth feel to the consumer. If the final moisture content is too low, the sheet may be too brittle or too stiff. If the final moisture content is too high, the sheet may be too sticky and its overall structural integrity may be compromised.

[0090] Test 4: Final Moisture Content of Sheet Articles The final moisture content of the solid sheet product of the present invention is obtained by using a Mettler Toledo HX204 Moisture Analyzer (Serial Number B706673091). A minimum of 1 g of the dried sheet product is placed on the measuring tray. A standard program is then run with additional program settings of 10 minutes analysis time and 110°C temperature.

[0091] product The dissolvable solid article can be any product, including, for example, a personal care product, a home care product, a fabric care product, a surface cleaning product, or an all-purpose cleaning product. Preferably, the product is a personal care product. Such personal products include, for example, personal cleansing products, such as body, face, and / or hand wash products, skin care products, such as lotions, facial mists, gels, and creams, and hair care products, such as shampoos and conditioners.

[0092] How to use A method of using the dissolvable solid article may include the steps of: a) applying an effective amount of a dissolvable porous solid to the hands; b) wetting the dissolvable porous solid with water and rubbing to dissolve the solid; c) applying the dissolved material to a subject, such as hair and / or skin; and d) rinsing the dissolved material from the subject using water.

[0093] combination 1. A dissolvable solid article, the dissolvable solid article comprising: a. about 10% to about 50% by weight of the article of a water-soluble polymer; b. about 5% to about 80% by weight of the article of a surfactant; c. A dissolvable solid article formed by a homogeneous mixture comprising from about 0.1% to about 40% by weight of the article of a silicone, the silicone having a particle size of from about 50 nm to about 25 micrometers. 2. The dissolvable solid article according to 1., wherein the silicone emulsion has a particle size of about 80 nm to about 22 micrometers, preferably about 100 nm to about 22 micrometers. 3. The dissolvable solid article of any one of 1. or 2., wherein the surfactant is selected from the group consisting of anionic surfactants, amphoteric surfactants, zwitterionic surfactants, and mixtures thereof. 4. A dissolvable solid article according to any one of 1. to 3., wherein the article further comprises a nonionic emulsifier. 5. A dissolvable solid article according to any one of 1. to 4., wherein the article contains up to about 0.3%, preferably up to about 0.2%, more preferably up to about 0.1% nitrogen derived from the silicone. 6. A dissolvable solid article according to any one of 1. to 5., wherein the article does not contain nitrogen derived from the silicone. 7. The dissolvable solid article according to any one of 1. to 6., wherein the dissolvable solid article has a density in the range of about 0.050 g / cm3 to about 0.4 g / cm3. 8. The dissolvable solid article according to any one of 1. to 7., wherein the dissolvable solid article has an open cell content of 80% to 100%. [Example]

[0094] The following examples further describe and demonstrate embodiments within the scope of the present invention. These examples are provided for illustrative purposes only and should not be construed as limiting the invention, as many variations thereof are possible without departing from the spirit and scope of the invention. Where applicable, components are identified by chemical or CTFA name, or are otherwise defined below.

[0095] [Table 1]

[0096] [Table 2]

[0097] Composition of a dissolvable solid article, e.g., for a hair conditioner (CD Example 1) The following wet slurry composition is used to prepare the dissolved porous solid article.

[0098] [Table 3]

[0099] The dissolved porous solid article prepared by using the wet slurry composition is a. about 10% to about 50% polyvinyl alcohol by weight of the article; b. about 5% to about 80% by weight of the article of surfactants (cationic surfactant and polysorbate-60); c. about 0.1% to about 40% by weight of the article of silicone, the silicone having a particle size of about 50 nm to about 25 micrometers.

[0100] [Table 4]

[0101] Manufacturing method The dissolvable solid article can be made, for example, by the manufacturing methods described in PCT Patent Application Publication Nos. 2020 / 147000 and / or 2020 / 147211.

[0102] In Comparative Example i, silicone is included in the article as a surface coating.

[0103] In HS Examples 1 to 3, FE Examples 1, FE Examples 2, and Comparative Examples ii and iii, the dissolvable solid articles are made from fluid compositions containing the ingredients listed above in the table.

[0104] The levels of the components in such fluid compositions are adjusted so that the components have the levels defined above in the dissolvable solid article. In HS Examples 1 to 3, FE Examples 1 and 2, and Comparative Example ii, the silicone is included in the fluid composition in the form of a silicone emulsion. In Comparative Example iii, the silicone is included in the fluid composition neat, i.e., in non-emulsion form.

[0105] The dissolvable solid articles of HS Example 1-3, FE Example 1 and FE Example 2, and CD Example 1 are examples of the present invention, which provide the benefits of silicone while avoiding reduced dissolution rate, sticky feeling and / or uneven conditioning benefits, silicone staining on substrates such as fabrics, and / or discoloration of the article.

[0106] The dissolvable solid articles of Comparative Examples i to iii are comparative examples. The article of Comparative Example i contains silicone as a surface coating on the article. Discoloration of the article is observed in the article of Comparative Example i, and a sticky feel and / or uneven conditioning effect is also observed. The article of Comparative Example ii contains smaller silicone particles, while the article of Comparative Example iii contains larger silicone particles. All of these articles have a reduced open cell content.

[0107] Dimensions and values ​​disclosed herein should not be understood as being strictly limited to the exact numerical values ​​recited. Instead, unless otherwise indicated, each such dimension is intended to mean both the recited value and a functionally equivalent range surrounding that value. For example, a dimension disclosed as "40 mm" is intended to mean "about 40 mm."

[0108] All documents cited herein, including any cross-referenced or related patents or patent applications, and any patent applications or patents to which this application claims priority or benefit, are incorporated herein by reference in their entirety, unless expressly stated to the contrary. The citation of any document shall not be deemed to be prior art to any invention disclosed or claimed herein, or to teach, suggest, or disclose any such invention, either alone or in combination with any other reference(s). Furthermore, to the extent that any meaning or definition of a term in this document conflicts with any meaning or definition of the same term in a document incorporated by reference, the meaning or definition assigned to that term in this document shall govern.

[0109] While particular embodiments of the present invention have been illustrated and described, it would be obvious 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. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.

Claims

1. 1. A dissolvable solid article, said dissolvable solid article comprising: a. 10% to 50% by weight of the article of a water soluble polymer selected from the group consisting of polyvinyl alcohol, polyvinylpyrrolidone, polyalkylene oxide, starch and starch derivatives, pullulan, gelatin, hydroxypropyl methylcellulose, methylcellulose, and carboxymethycellulose; b. 5% to 80% by weight of the article of a surfactant; c. 0.1% to 40% silicone by weight of the article; wherein the silicone is a solid particle having a particle size of 50 nm to 280 nm, and the dissolvable solid article is a flexible, porous, open-cell foam having an open cell content of 80% to 93.85%.

2. A dissolvable solid article as described in claim 1, wherein the silicone is a solid particle having a particle size of 80 nm to 280 nm.

3. A dissolvable solid article as described in claim 2, wherein the silicone is a solid particle having a particle size of 100 nm to 280 nm.

4. 10. The dissolvable solid article of claim 1, wherein the surfactant is selected from the group consisting of anionic surfactants, amphoteric surfactants, zwitterionic surfactants, and mixtures thereof.

5. The dissolvable solid article of claim 1 , wherein the article further comprises a non-ionic emulsifier.

6. 10. The dissolvable solid article of claim 1, wherein said article contains a maximum of 0.3% nitrogen derived from said silicone.

7. 7. The dissolvable solid article of claim 6, wherein said article contains a maximum of 0.2% nitrogen derived from said silicone.

8. 8. The dissolvable solid article of claim 7, wherein said article contains a maximum of 0.1% nitrogen derived from said silicone.

9. 9. The dissolvable solid article of claim 8, wherein said article is free of nitrogen derived from said silicone.

10. The dissolvable solid article has a viscosity of 0.050 g / cm 3 ~0.4g / cm 3 10. The dissolvable solid article of claim 1 having a density in the range of

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