Cleaning compositions comprising a mixture of fatty acids and soap, and a method for preparing cleaning strips comprising the mixture.

Abstract

A cleaning composition comprises 25%-35% by weight of a surfactant, 1.5%-5% by weight of a co-surfactant, 5%-9% by weight of water, and 50%-60% by weight of a mixture of fatty acids and soap, wherein the ratio of fatty acids to soap is 2.3:1 to 1.8:1. A method for preparing a cleaning strip includes heating the cleaning composition to a temperature sufficient to provide a molten composition, cooling the molten composition to form flakes and / or fragments, refining the flakes and / or fragments to form a blank, and stamping and / or cutting the blank to form a cleaning strip. Another method for preparing a cleaning strip includes heating the cleaning composition to a temperature sufficient to provide a molten composition, pouring the molten composition into a mold, cooling the molten composition until a cleaning strip is formed, and removing the cleaning strip from the mold.

Description

Technical Field

[0001] This document discloses a cleaning composition. This cleaning composition contains less surfactant than other cleaning compositions, thus providing a gentler soap and other benefits. The cleaning composition comprises a surfactant, a co-surfactant, water, and a mixture of fatty acids and soap. Background Technology

[0002] Fatty acid soaps are a highly effective and inexpensive cleansing product, but they can also be irritating to the skin. Short-chain (e.g., C45) soaps... 14 and below, or C 12 Soaps containing saturated and less soluble carbon chains (such as sodium oleate) and unsaturated long-chain oleate (such as sodium oleate) offer good lathering and detergency, but may also irritate and dry out the skin. Removing more soluble and irritating carbon chains from the soap chain distribution can reduce irritation, but at the expense of desired user characteristics such as lathering speed, amount of foam, and quality.

[0003] U.S. Patent Publication No. 2006 / 0225285A1 by Slavtcheff et al. discloses a razor head assembly containing a mild cleansing composition (containing an acyl hydroxyethyl sulfonate surfactant) located near the blades for shaving and skin treatment. The hydroxyethyl sulfonate surfactant provides the user with nearly simultaneous moisturizing, cleansing, and shaving. In a preferred embodiment, a post-shaving phase is provided in addition to the cleansing phase.

[0004] To achieve a gentler bar, the composition can replace some or all of the fatty acid soap content with a synthetic surfactant (“synthetic detergent” bar). Synthetic surfactants tend to be gentler than soap, but due to their high content required to achieve the desired foaming effect for consumers, they can still be irritating to the skin. The excellent detergency of high surfactant levels also hinders the deposition of additional benefits achievable through bar compositions, such as fragrances or skin-beneficial ingredients.

[0005] Therefore, the need for cleaning compositions that minimize not only irritating surfactants but also total surfactant content persists. Balancing the amounts of these materials provides gentleness and enhanced benefits, such as moisturizing and longer-lasting fragrance, while still being processed into bars without sacrificing any user experience. Summary of the Invention

[0006] The cleaning composition is disclosed in various aspects.

[0007] A cleaning composition comprises: 25% to 35% by weight of a surfactant, 1.5% to 5% by weight of a co-surfactant, 5% to 9% by weight of water; and 50% to 60% by weight of a mixture of fatty acids and soap. The ratio of fatty acids to soap is 2.3:1 to 1.8:1.

[0008] These and other features and characteristics are described in more detail below. Detailed Implementation

[0009] The cleansing composition disclosed herein relates to a solid cleansing strip composition. This cleansing composition is a balanced formulation consisting of surfactants, co-surfactants, fatty acids, soap, and optionally other blended ingredients. This cleansing composition is described as balanced because this unique composition offers clinical advantages over known compositions on the market, provides cost benefits (through minimizing surfactants and utilizing stearic acid), and achieves both clinical and cost benefits without sacrificing the foaming enjoyment expected from compositions using a similar set of ingredients. This cleansing composition achieves superior skin benefits without compromising the consumer experience.

[0010] The ratio of fatty acids to soap, and the level of incorporation of these two components in the final composition, are important characteristics of the cleaning compositions disclosed herein. Since solid synthetic detergents tend to minimize total surfactant levels, fatty acids and soap will constitute a significant portion of the formulation, and thus significantly influence the composition's structure and consequently its phase behavior and rheology by default. An unexpected benefit of this cleaning composition space is the phase behavior during component incorporation. Each unique composition can be processed in a molten state into a dough-like consistency or a molten fluid (i.e., thinned sufficiently to pour). Viscous, dough-like, or fluid melts can be crystallized, extruded, and processed into usable forms. A second option, in a fluid molten state, is to pour it into a mold, crystallize it, and remove it from the mold as a usable form.

[0011] A unique feature of the cleaning compositions disclosed herein is their phase behavior, as the formulation can exist as a viscous dough or a thin, easily pourable liquid at mixing temperatures where all materials are in a molten state. This phase behavior provides flexibility in the manufacture of the cleaning compositions, allowing dough at high temperatures (e.g., above 100°C) to be cooled by peeling on cooling rollers, belt peeling, milling, etc., and liquids at high temperatures (e.g., above 100°C) to be cooled as detailed above, or processed via a melt case process, in which molten material is poured into a mold for cooling.

[0012] Furthermore, typical soaps (i.e., neutralized fatty acids or saponified oils as is typical in the art) have proven to be an asset that does not have any negative impact on clinical performance. Maintaining the fatty acid to soap ratio and achieving the appropriate final formulation pH mitigates any negative effects commonly associated with soap (i.e., irritating, clinically poor products).

[0013] The cleaning composition may include a surfactant; specifically, the cleaning composition may include 25% to 35% by weight of a surfactant. The surfactant may be present in an amount greater than 25% by weight and less than 35% by weight. The surfactant may be present in an amount of 26% to 32% by weight.

[0014] The cleaning composition may include a co-surfactant; specifically, the cleaning composition may include 1.5% to 5% by weight of the co-surfactant. The co-surfactant may be present in an amount greater than or equal to 1.5% by weight and less than or equal to 5% by weight. The co-surfactant may be present in an amount of 2.0% to 4% by weight, for example, 2.5% to 3.5% by weight.

[0015] Surfactants and / or co-surfactants may be selected from anionic surfactants, amphoteric surfactants, amphoteric surfactants, or combinations thereof. The following discussion refers to surfactants, co-surfactants, or surfactants and co-surfactants. Surfactants and / or co-surfactants may contain C8-C. 18 Alkyl, for example, C 12 -C 16 Alkyl, for example, C 10 -C 14 Alkyl groups, or mixtures thereof. For example, surfactants and / or co-surfactants may contain C... 10 Alkyl, C 12 Alkyl, C 14 Alkyl groups or any combination thereof.

[0016] When present, the anionic surfactant used may include aliphatic sulfonates, such as primary alkanes (e.g., C8-C4). 22 ) sulfonates, primary alkanes (e.g., C8-C 22 disulfonates, C8-C 22 Olefin sulfonates, C8-C 22 Hydroxyalkyl sulfonates or alkyl glycerol ether sulfonates (AGS); or aromatic sulfonates such as alkylbenzene sulfonates. Anionic surfactants can also be alkyl sulfates (e.g., C14). 12 -C 18 Alkyl sulfates or alkyl ether sulfates (including alkyl glycerol ether sulfates). Alkyl ether sulfates include those having the following formula:

[0017] RO(CH2CH2O) n SO3M

[0018] Wherein R is an alkyl or alkenyl group having 8 to 18 carbons, preferably 12 to 18 carbons, n has an average value of at least 1.0, preferably less than 5, most preferably 1 to 4, and M is a solubilizing cation, such as sodium, potassium, ammonium, or substituted ammonium.

[0019] Anionic surfactants can also be alkyl sulfonyl succinates (including monoalkyl and dialkyl, for example, C6-C). 22 sulfosuccinates); alkyl and acyl taurates (usually methyl taurate), alkyl and acyl sarcosinates, sulfoacetates, C8-C 22 Alkyl phosphates and phosphonates, alkyl phosphates and alkoxyalkyl phosphates, acyl lactates, C8-C 22 Monoalkyl succinates and maleates, sulfoacetates, alkyl glucosides and acyl hydroxyethyl sulfonates, etc.

[0020] Sulfosuccinates can be monoalkyl sulfosuccinates having the following formula:

[0021] R 1 OC(O)CH2CH(SO3M)CO2M;

[0022] And the following amide-MEA sulfosuccinate:

[0023] R 1 CONHCH2CH2OC(O)CH2CH(SO3M)CO2M

[0024] Where R 1 The range is C8-C 22 alkyl.

[0025] Sarcosine salts are usually represented by the following formula:

[0026] R 2 CON(CH3)CH2CO2M, where R 2 The range is C8-C 20 alkyl.

[0027] Taurine salts are usually represented by the following formula:

[0028] R 3 CONR 4 CH2CH2SO3M

[0029] Where R 3 It is C8-C 20 Alkyl, R 4 It is a C1-C4 alkyl group.

[0030] M is a solubilizing cation as described above.

[0031] The cleaning compositions disclosed herein may contain C8-C 18Acyl hydroxyethyl sulfonates. These esters are prepared by reacting an alkali metal hydroxyethyl sulfonate with a mixture of aliphatic fatty acids having 6 to 18 carbon atoms and an iodine value less than 20. At least 75% of the mixed fatty acids have 12 to 18 carbon atoms and up to 25% have 6 to 10 carbon atoms.

[0032] The acylhydroxyethyl sulfonate can be an alkoxylated hydroxyethyl sulfonate, as described in U.S. Patent No. 5,393,466 to Ilardi et al., entitled “Fatty Acid Esters of Polyalkoxylatedisethonic acid,” issued February 28, 1995, which is incorporated herein by reference. The compound has the following general formula:

[0033] R 5 C—(O)O—C(X)H—C(Y)H—(OCH2—CH2) m —SO3M

[0034] Where R 5 It is an alkyl group having 8 to 18 carbons, m is an integer from 1 to 4, X and Y are each independently hydrogen or an alkyl group having 1 to 4 carbons, and M is a solubilizing cation as described above.

[0035] In one aspect of this cleaning composition, the anionic surfactant used is 2-acrylamido-2-methylpropanesulfonic acid, ammonium lauryl sulfate, ammonium perfluorononanoate, potassium lauryl sulfate, sodium alkyl sulfate, sodium dodecyl sulfate, sodium lauryl ether sulfate, sodium lauroyl sarcosinate, sodium stearate, sodium sulfosuccinate, sodium lauroyl hydroxyethyl sulfonate, or combinations thereof. Such anionic surfactants are commercially available from suppliers such as Galaxy Surfactants, Clariant, Sino Lion, Stepan Company, and Innospec.

[0036] Optionally, amphoteric surfactants may be included in the cleaning compositions disclosed herein. Amphoteric surfactants (which may be zwitterionic depending on pH) include sodium acylamphoteric acid, sodium acylamphoteric propionate, disodium acylamphoteric diacetate, and disodium acylamphoteric dipropionate, wherein the acyl group (i.e., an alkyl group) may contain C7-C. 18 Alkyl moiety. Illustrative examples of amphoteric surfactants include sodium lauroylamphoacetate, sodium cocoamphoacetate, sodium lauroylamphoacetate, or combinations thereof.

[0037] As for the zwitterionic surfactants used in this cleaning composition, such surfactants include at least one acid group. Such acid groups can be carboxylic acid or sulfonic acid groups. They typically include quaternary nitrogen groups and are therefore quaternary amino acid groups. They should typically include an alkyl or alkenyl group with 7 to 18 carbon atoms and generally conform to the following overall structural formula:

[0038] R 6 —[—C(O)—NH(CH2) q —] r —N + (R 7 (R) 8 )-A—B

[0039] Where R 6 It is an alkyl or alkenyl group with 7 to 18 carbon atoms; R 7 and R 8 Each is independently an alkyl, hydroxyalkyl, or carboxyl group with 1 to 3 carbon atoms; q is 2 to 4; r is 0 to 1; A is an alkylene group with 1 to 3 carbon atoms optionally substituted with a hydroxyl group; and B is -CO2- or -SO3-.

[0040] Ideal zwitterionic surfactants for use in the cleaning compositions disclosed herein and within the above general formulas include simple betaines of the following formula:

[0041] R 6 —N + (R 7 (R) 8 )-CH2CO2 -

[0042] And the following formula of amide betaine:

[0043] R 6 —CONH(CH2) t —N + (R 7 (R) 8 )-CH2CO2 -

[0044] Where t is 2 or 3.

[0045] In both equations, R 6 R 7 and R 8 As defined above. R 6 Specifically, it can be C derived from coconut oil. 12 and C 14 A mixture of alkyl groups, wherein at least half, preferably at least three-quarters, of the R group is present. 6 The group has 10 to 14 carbon atoms. R 7 and R 8Methyl is preferred.

[0046] Another possibility is that the zwitterionic surfactant is sulfobetaine of the following formula:

[0047] R 6 —N + (R 7 (R) 8 )-(CH2)3SO3 - or

[0048] R 6 —CONH(CH2) u —N + (R 7 (R) 8 )-(CH2)3SO3 -

[0049] Where u is 2 or 3, or where -(CH2)3SO3 - -CH2C(OH)(H)CH2SO3 - The alternative to its variants.

[0050] In these formulas, R 6 R 7 and R 8 As defined above.

[0051] Illustrative examples of desired zwitterionic surfactants include betaines, such as lauryl betaine, citrate betaine, cocamidopropyl betaine, cocamidopropyl betaine, cocamidopropyl betaine, and lauramide propyl betaine. Other suitable zwitterionic surfactants include cocamidopropyl sulfonyl betaine, for example, cocamidopropyl hydroxysulfonyl betaine. Preferred zwitterionic surfactants include lauryl betaine, citrate betaine, sodium hydroxymethylglycinate, (carboxymethyl)dimethyl-3-[(1-oxododecyl)amino]propylammonium hydroxide, cocamidopropyl dimethyl betaine, (carboxymethyl)dimethyl oleyl ammonium hydroxide, cocamidopropyl betaine, (carboxymethyl)dimethyl(octadecyl)ammonium, cocamidopropyl hydroxysulfonyl betaine, or combinations thereof. Such surfactants are commercially available from suppliers such as Stepan Company, Solvay, Evonik, etc., and mixtures of the above surfactants are within the scope of the cleaning compositions disclosed herein.

[0052] Nonionic surfactants may optionally be used in cleaning compositions. When used, the amount of nonionic surfactant is typically as low as 0.5, 1, 1.5, or 2% by weight, and as high as 6, 8, 10, or 12% by weight. Nonionic surfactants that can be used particularly include the reaction products of compounds having hydrophobic groups and reactive hydrogen atoms (e.g., aliphatic alcohols, acids, amides, or alkylphenols) with epoxides (especially ethylene oxide alone or with propylene oxide). Specific nonionic surfactant compounds are alkyl (C6-C4) compounds. 22 ) Phenols, ethylene oxide condensates, aliphatic (C8-C) 18 Condensation products of linear or branched primary or secondary alcohols with ethylene oxide, as well as products prepared by the condensation of ethylene oxide with the reaction products of propylene oxide and ethylenediamine. Other nonionic surfactants include long-chain tertiary amine oxides, long-chain tertiary phosphine oxides, dialkyl sulfoxides, etc.

[0053] In one aspect, nonionic surfactants may include fatty acid / alcohol ethoxylates having the following structure: a) HOCH2(CH2) s (CH2CH2O) c H or b)HOOC(CH2) v (CH2CH2O) d H; where s and v are each independently an integer of at most 18; c and d are each independently an integer of 1 or greater. In one aspect, s and v can each independently be from 6 to 18; c and d can each independently be from 1 to 30. Other options for nonionic surfactants include those having the formula HOOC(CH2). i —CH=CH—(CH2) k (CH2CH2O) z For H, i and k are each independently 5 to 15; z is 5 to 50. For the other case, i and k are each independently 6 to 12; z is 15 to 35.

[0054] Nonionic surfactants may also include glycoamides, such as polysaccharide amides. Specifically, the surfactant may be one of the lactobionamides described in U.S. Patent No. 5,389,279 to Au et al., entitled “Compositions Comprising Noionionic Glycolipid Surfactants,” issued February 14, 1995, which is incorporated herein by reference, or it may be one of the glycoamides described in U.S. Patent No. 5,009,814 to Kelkenberg, entitled “Use of N-Poly Hydroxyalkyl Fatty Acid Amides as Thickening Agents for Liquid Aqueous Surfactant Systems,” issued April 23, 1991, which is incorporated herein by reference.

[0055] Illustrative examples of nonionic surfactants that may be optionally used in the cleaning compositions disclosed herein include, but are not limited to, polysaccharides, cetyl alcohol, decyl glucoside, lauryl glucoside, octyl glycol monododecyl ether, n-octyl β-d-thiopyranoside, octyl glucoside, oleyl alcohol, polysorbate, sorbitol dehydrated, stearyl alcohol, or combinations thereof.

[0056] In one respect, cationic surfactants may optionally be used in the cleaning compositions of this application.

[0057] One class of cationic surfactants includes heterocyclic ammonium salts, such as hexadecyl or stearyl pyridine chloride, alkylamide ethyl pyrrolinodium methyl sulfate, and lapiroxammonium chloride.

[0058] Tetraalkylammonium salts are another class of useful cationic surfactants. Examples include hexadecyl or stearyltrimethylammonium chloride or ammonium bromide; hydrogenated palmitate or tallow trimethylammonium halide; docosyltrimethylammonium halide or methylammonium sulfate; decyl isononyl dimethylammonium halide; ditowyl (or distearate) dimethylammonium halide and docosyldimethylammonium chloride.

[0059] Other types of cationic surfactants that can be used are various ethoxylated quaternary ammonium and ester quaternary ammonium salts. Examples include PEG-5 stearyl ammonium lactate (e.g., Genamin KSL manufactured by Clariant), PEG-2 coconut oil-based ammonium chloride, PEG-15 hydrogenated tallow ammonium chloride, PEG 15 stearyl ammonium chloride, dipalmitoyl ethyl methyl ammonium chloride, dipalmitoyl hydroxyethyl methyl sulfate, and stearoylamidopropyl dimethylamine lactate.

[0060] Other useful cationic surfactants include quaternized hydrolysates of silk protein, wheat protein, and keratin, and mixtures of the above-mentioned cationic surfactants are also within the scope of cleaning compositions.

[0061] If used, the cationic surfactant shall not exceed 1.0% by weight of the cleaning composition. When present, the cationic surfactant typically comprises 0.01 to 0.7% by weight of the cleaning composition, more typically 0.1 to 0.5%, including all ranges contained herein.

[0062] Particularly preferred surfactants for use in this cleaning composition include cocamidopropyl hydroxysulfonate, cocamidosulfosuccinate, sodium lauroyl hydroxyethyl sulfonate, or combinations thereof, with the most preferred surfactant being sodium lauroyl hydroxyethyl sulfonate or combinations thereof.

[0063] Particularly preferred co-surfactants used in this cleaning composition include cocamidopropyl betaine, sodium methylcocoyl taurate, sodium cocoyl glycinate, sodium cocoyl glutamate, methyl ester sulfonate, fatty acid ester sulfonate, or combinations thereof.

[0064] The cleaning composition further contains 5% to 9% by weight of water, for example, greater than or equal to 5% by weight and less than or equal to 9% by weight of water. For example, the cleaning composition contains 6% to 8% by weight of water.

[0065] The cleansing composition also contains 50% to 60% by weight of a mixture of fatty acids and soap. The ratio of fatty acids to soap can be from 2.3:1 to 1.8:1. Compared with other formulations, the presence of a large mixture of fatty acids and soap allows for a significant reduction in the amount of surfactant without the loss, thus gaining skin benefits.

[0066] The fatty acids may be selected from lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, linoleic acid, lanonic acid, isostearic acid, arachidonic acid, hydroxystearic acid or combinations thereof, and preferably the fatty acids are selected from stearic acid, palmitic acid or combinations thereof.

[0067] The term "soap" is used herein in its common sense, namely, a salt of aliphatic alkane or olefin monocarboxylic fatty acid having 6 to 22 carbon atoms, and more preferably 8 to 18 carbon atoms.

[0068] Typical soap salts are alkali metal salts or alkyl ammonium salts of these fatty acids, although other metal salts of fatty acids, such as magnesium salts, can also be used. Sodium, potassium, magnesium, monoethanolammonium, diethanolammonium, and triethanolammonium salts of these acids are the soaps desired for use in this article.

[0069] Soap can be made from neutralized fatty acids. The neutralized fatty acids can be selected from lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, linoleic acid, lanonic acid, isostearic acid, arachidonic acid, hydroxystearic acid or combinations thereof, preferably, the fatty acids are selected from stearic acid, palmitic acid or combinations thereof.

[0070] Soap may contain lauric acid and a mixture of acids selected from myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, linoleic acid, lanonic acid, isostearic acid, arachidonic acid, hydroxystearic acid, or combinations thereof. When lauric acid is used, it may be present in the fatty acid and soap mixture at 80% by weight; for example, lauric acid may be present in the fatty acid and soap mixture at 85% by weight. Lauric acid is typically rich in C. 12 It includes coconut oil and / or palm kernel oil.

[0071] The cleaning composition may also contain a variety of additives, including but not limited to colorants, emollients, anti-dandruff agents, skin feel agents, silicone oils, cationic polymers, or combinations thereof. Each of these substances may be present in amounts from about 0.03 to about 5% by weight of the liquid and the total weight of the composition, for example, 0.03 to 5% by weight, preferably 0.1 to 3% by weight, including all ranges contained herein. For example, colorants may be present in amounts from five parts per million (ppm) to 15 ppm, for example, about 15 ppm, for example, 15 ppm.

[0072] Additional optional ingredients that may be present in the personal care formulations are, for example: fragrances; masking and chelating agents such as tetrasodium EDTA, ethane-hydroxybisphosphonic acid (EHDP), and etidronic acid, also known as 1-hydroxyethylidene bisphosphonic acid (HEDP); colorants; opacifiers and pearlescent agents such as zinc stearate, magnesium stearate, TiO2, ethylene glycol monostearate (EGMS), ethylene glycol distearate (EGDS), or Lytron 621 (styrene / acrylate copolymer); pH adjusters; antioxidants such as butylated hydroxytoluene (BHT); stabilizers; foaming agents such as cocoyl mono- or diethanolamide; ionized salts such as sodium chloride and sodium sulfate; and other ingredients conventionally used in bar soap formulations. The total amount of such additional optional ingredients is typically 0 to 10% by weight, more particularly 0.1 to 5% by weight, based on the total weight of the personal care formulation.

[0073] This composition typically contains one or more skin-beneficial agents. The term "skin-beneficial agent" is defined as a substance that softens or improves the elasticity, appearance, and youthfulness of the skin (stratum corneum) by increasing its water content, adding or replacing lipids and other skin nutrients, or both, and maintains softness by delaying the reduction of its water content. Suitable skin-beneficial agents include emollients, including, for example, hydrophobic emollients, hydrophilic emollients, or mixtures thereof.

[0074] Useful skin-beneficial agents include the following: (a) silicone oils and their modifications, such as linear and cyclic polydimethylsiloxanes; amino, alkyl, alkylaryl and aryl silicone oils; (b) fats and oils, including natural fats and oils such as jojoba oil, soybean oil, sunflower oil, rice bran oil, avocado oil, almond oil, olive oil, sesame oil, peach kernel oil, castor oil, coconut oil and mink oil; cocoa butter; tallow and lard; hardened oils obtained by hydrogenation of the above oils; and synthetic monoglycerides, diglycerides and triglycerides, such as glyceryl myristate and glyceryl 2-ethylhexanoate; (c) waxes, such as carnauba wax, cetearyl wax, beeswax, lanolin and their derivatives; (d) Hydrophobic and hydrophilic plant extracts; (e) Hydrocarbons, such as liquid paraffin, petrolatum, microcrystalline wax, pure ceresin, squalene, pterostilbene, and mineral oil; (f) Higher fatty acids, such as lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, linoleic acid, linolenic acid, lanonic acid, isostearic acid, arachidonic acid, and polyunsaturated fatty acids (PUFAs); (g) Higher alcohols, such as lauryl alcohol, cetyl alcohol, stearyl alcohol, oleyl alcohol, behenicol, cholesterol, and 2-hexyldecyl alcohol; (h) Esters, such as cetyl caprylate, myristyl lactate, cetyl lactate, isopropyl myristate, myristyl myristate, and isopropyl palmitate. Isopropyl adipate, butyl stearate, decyl oleate, cholesterol isostearate, glyceryl monostearate, glyceryl monolaurate, glyceryl distearate, glyceryl tristearate, alkyl lactate, alkyl citrate, and alkyl tartrate; (i) essential oils and their extracts, such as peppermint, jasmine, camphor, white cedar, bitter orange peel, ryu, turpentine, cinnamon, bergamot, citrus, calamus, pine, lavender, bay, clove, hiba, eucalyptus, lemon, starflower, thyme, peppermint, rose, sage, sesame, ginger, basil, juniper, lemongrass, rosemary Fragrance, rosewood, avocado, grape, grape seed, myrrh, cucumber, watercress, calendula, elderflower, geranium, linden flower, amaranth, seaweed, ginkgo, ginseng, carrot, guarana, tea tree, jojoba, alkanet root, oats, cocoa, orange blossom, vanilla, green tea, peppermint, aloe vera, menthol, eucalyptol, eugenol, citral, citronella, borneol, linalool, geraniol, evening primrose, camphor, thymol, spirantol, penene, limonene, and terpene oils; (j) polyhydroxy alcohols, such as glycerin, sorbitol, propylene glycol, etc.; and polyols, such as polyethylene glycol, examples of which are: Polyox WSR-205PEG 14M, Polyox WSR-N-60K PEG 45M or Polyox WSR-N-750 and PEG 7M; (k) lipids such as cholesterol, ceramides, sucrose esters and pseudoceramides as described in European Patent Specification No. 556,957; (l) vitamins, minerals and skin nutrients such as milk, vitamins A, E and K;Vitamin alkyl esters, including vitamin C alkyl esters; magnesium, calcium, copper, zinc and other metallic components; (m) sunscreens, such as octyl methoxycinnamate (Parsol MCX) and butyl methoxybenzoylmethane (Parsol 1789); (n) phospholipids; and (o) anti-aging compounds, such as α-hydroxy acids and β-hydroxy acids. Skin-beneficial agents typically constitute up to 30% by weight of the liquid soap formulation, in a content of 0 to 25% by weight, more particularly 0 to 20% by weight, which is typical of those skin-beneficial agents commonly referred to as "emollients" used in many of the described formulations. Preferred skin-beneficial agents include fatty acids, hydrocarbons, polyols, polyols and mixtures thereof, including at least one C; 12 To C 18 Emollients containing fatty acids, petrolatum, glycerin, sorbitol, and / or propylene glycol are of particular interest in one or more embodiments.

[0075] Strips can be manufactured by heating a mixer to approximately 80°C to approximately 90°C, for example, 80°C to 90°C, adding fatty acids, followed by the addition of a caustic alkali to form a precursor, and then adding surfactants and other strip materials. The mixture is dried to the target moisture content and then cooled. The cooled material is then extruded, formed into preforms, and pressed into strips.

[0076] A method for preparing a cleaning strip may include heating the cleaning composition disclosed herein to a temperature sufficient to provide a molten composition, then cooling the molten composition to form sheets and / or fragments, refining the sheets and / or fragments to form a blank, and stamping and / or cutting the blank to form a cleaning strip. The cleaning composition is heated to a temperature of at least 100°C, for example, 100°C to 120°C, for example, 105°C to 120°C.

[0077] Another method for preparing the cleaning composition may include heating the cleaning composition disclosed herein to a temperature sufficient to provide a molten composition, pouring the molten composition into a mold, cooling the molten composition until a cleaning strip is formed, and removing the cleaning strip from the mold. The cleaning composition is heated to a temperature of at least 100°C, for example, 100°C to 120°C, for example, 105°C to 120°C.

[0078] Example

[0079] The following examples are merely examples of the cleaning compositions disclosed herein and are not intended to limit their scope.

[0080] Batch processing is used to create individual synthetic detergent base formulations. The basic procedure involves heating fatty acids above their melting point, partially neutralizing them as needed, optionally adding them to pre-made soap, adding the desired primary and co-surfactants and optional secondary ingredients, heating until homogeneous, drying to the desired moisture content, and then crystallizing to room temperature for subsequent treatment.

[0081] Subsequent processing involves shaping the base material into a usable form for evaluation purposes. It is considered important that these formulations meet certain criteria for extrusion. Notably, the material must be sufficiently hard to be pressed into billets and optionally stamped into strips. Hardness can be defined using a TA.XT Plus Texture Analyzer. The formulation examples presented herein empirically correlate TAXT data with suitability for processing via extrusion. Five measurements were performed on each sample, and the average was taken. The measurement method required a 30° cone with a penetration procedure test speed of 1.00 mm / s, a distance of 10.00 mm, and a trigger force of 0.0050 kg. The temperature of the material was also recorded. A generally accepted range is that if a material's TAXT reading is between 1000 and 4000, it is suitable for processing.

[0082] The unique characteristic of this formulation space is its phase behavior. At the mixing temperature (defined as when all materials are in a molten state), the formulation can exist as a viscous dough or a thin, easily pourable liquid. This phase behavior is advantageous because it allows for manufacturing flexibility. Dough at high temperatures (i.e., above 100°C) can potentially be cooled in conventional ways (stripping on cooling rollers, belt stripping, milling, etc.). Liquids at high temperatures (i.e., above 100°C) also have the potential for conventional cooling as described above, but can be further processed via a casting process, in which molten material is poured into a mold for cooling.

[0083] For any ratio of ingredients in the cleaning compositions disclosed herein, the phase chemistry during mixing is determined by the amount of water in the formulation. For a given formulation, a dough consistency always has a higher moisture content than its liquid counterpart; that is, for a given formulation, a phase change based on water content can be determined. Conventional synthetic detergent manufacturing requires sufficient moisture during mixing to ensure batch homogeneity. Typically, batches begin with a moisture content higher than desired and require drying to reach the target moisture content. It is in this part of the process that it can be determined whether the formulation remains doughy or whether it is sufficiently dried to achieve a dilute fluid phase change. This phase change is unique to each specific composition, but for all compositions, there exists a phase change point below which the formulation will be liquid, and above which the formulation will be doughy. For any composition cooled into sheets and extruded, the requirements for extrusion (as described above) must be met.

[0084] Table 1 illustrates the different material ratios and the unique percentage of water content for each that can be defined as a phase transition point. Each formulation uses a “target” water content of 7.5% as a reserved placeholder in the composition, but the actual water content of the batch determines the phase chemistry. All listed amounts are in weight percent (%).

[0085] Table 1

[0086]

[0087] The selection of the space for this formulation is defined by the following parameters:

[0088] Examples 1 and 8

[0089] Example 1 defines a typical formulation within this space. Free fatty acids constitute the largest portion of the composition, but the material still exhibits sufficient hardness to allow for processing by extrusion. The ratio of fatty acids to soap is 1.9. The process for preparing this formulation is as follows: Stearic acid is heated above its melting point to approximately 100°C, at which point it is partially neutralized with a sodium hydroxide solution to obtain sodium stearate. When the mixture is homogeneous, 90 / 10 soap is added and mixed at 100°C to obtain a homogeneous solution. Sodium lauroyl hydroxyethyl sulfonate (containing residual stearic acid and lauric acid) is then added and mixed above 100°C to obtain a fluid composition. Cocamidopropyl betaine is then added, and the mixture is heated above 100°C to remove excess moisture. When the target moisture content is reached, the batch is complete, and the batch is then cooled and processed in one of the ways previously described herein. All subsequent examples are carried out in the manner just described, with appropriate substitutions made according to this example.

[0090] Example 1

[0091] composition weight% stearic acid 32.2 Sodium lauroyl hydroxyethyl sulfonate 30 Sodium stearate 12.4 90 / 10 soap 6.2 Cocamidopropyl Betaine 3.9 Lauric acid 3.4 water 7.5 other 4.4

[0092] TAXT: 2447 at 35.4℃.

[0093] In Example 1, the soap component consists of sodium stearate prepared in situ by partially neutralizing stearic acid and pre-made soap noodles. The soap component need not be a combination of sodium stearate and soap noodles, as shown in Example 8 (where the entire soap consists of sodium stearate).

[0094] Example 8

[0095] composition weight% stearic acid 32.1 Sodium lauroyl hydroxyethyl sulfonate 30 Sodium stearate 18 Sodium methylcocoyl taurate 3 Lauric acid 4.2 water 9 other 3.7

[0096] TAXT: 1651; 32.2℃

[0097] In Example 1, cocamidopropyl betaine was used as a co-surfactant, but the composition is by no means limited to this co-surfactant.

[0098] Examples 2-7

[0099] The examples below demonstrate how a variety of co-surfactants with very different chemical properties can be used without affecting the processing of the formulation. Combinations of co-surfactants can also be used. Demonstrations using different surfactant / co-surfactant combinations allow for the customization of foam properties, such as creamy, milky, small-bubble, and large-bubble foams, without significantly affecting the acceptable amount of foam. Such properties are typically evaluated by those skilled in the art by comparison with typical synthetic detergent anchors (e.g., DOVE).

[0100] Example 2

[0101] composition weight% stearic acid 38.2 Sodium lauroyl hydroxyethyl sulfonate 25 Sodium stearate 18.8 Cocamidopropyl Betaine 3 Lauric acid 3.6 water 6.5 other 5.0

[0102] Example 3

[0103] composition weight% stearic acid 32.5 Sodium lauroyl hydroxyethyl sulfonate 30 Sodium stearate 12 90 / 10 soap 6 glycine salt 3.9 Lauric acid 3.5 water 7.5 other 4.6

[0104] TAXT: 2375; 39.5℃

[0105] Example 4

[0106] composition weight% stearic acid 34.6 Sodium lauroyl hydroxyethyl sulfonate 28 Sodium stearate 12 90 / 10 soap 6 MES 5 Lauric acid 3.2 water 7.5 other 3.7

[0107] TAXT: 1208, 33.8℃

[0108] Example 5

[0109] composition weight% stearic acid 32.2 Sodium lauroyl hydroxyethyl sulfonate 30 Sodium stearate 12 90 / 10 soap 6 Sodium methylcocoyl taurate 3.9 Lauric acid 3.9 water 7.5 other 4.5

[0110] TAXT: 1739; 34.4℃

[0111] Example 6

[0112]

[0113]

[0114] TAXT: 2179; 35.2℃

[0115] Example 7

[0116] composition weight% stearic acid 32.2 Sodium lauroyl hydroxyethyl sulfonate 30 Sodium stearate 12 90 / 10 soap 6 Cocamidopropyl Betaine 3 Sodium methylcocoyl taurate 1.5 Lauric acid 3.7 water 7.5 other 4.1

[0117] TAXT: 2996; 40.6℃

[0118] Examples 9-12

[0119] The following examples demonstrate the possibility of altering the level of the primary active ingredient, sodium lauroyl hydroxyethyl sulfonate. In these systems, the amount and ratio of total surfactant, co-surfactant, acid:soap affect the phase transition depending on the water content.

[0120] Example 9

[0121] composition weight% stearic acid 38.2 Sodium lauroyl hydroxyethyl sulfonate 25 Sodium stearate 18.8 Cocamidopropyl Betaine 3 Lauric acid 3.6 water 6.5 other 4.9

[0122] Example 10

[0123] composition weight% stearic acid 32.7 Sodium lauroyl hydroxyethyl sulfonate 27 Sodium stearate 18.8 Sodium methylcocoyl taurate 3 Lauric acid 3.6 water 10 other 4.9

[0124] Example 11

[0125] composition weight% stearic acid 33.2 Sodium lauroyl hydroxyethyl sulfonate 30.1 Sodium stearate 12 90 / 10 soap 6.8 Cocamidopropyl Betaine 3 Lauric acid 3.6 water 6.5 other 4.8

[0126] TAXT: 2499; 38.2℃

[0127] Example 12

[0128] composition weight% stearic acid 30.1 Sodium lauroyl hydroxyethyl sulfonate 32 Sodium stearate 12.45 90 / 10 soap 6.2 Cocamidopropyl Betaine 3 Lauric acid 3.6 water 7.5 other 5.15

[0129] TAXT: 3610; 41.7℃

[0130] Examples 13-21

[0131] The remaining compositions further demonstrate the ability to alter the levels of fatty acids, sodium lauroyl hydroxyethyl sulfonate, soap, and co-surfactants. It should be noted that the compositions of these examples are processable formulations in terms of their TAX values, meaning that their compositions can be formulated into bars.

[0132] Example 13

[0133] composition weight% stearic acid 34 Sodium lauroyl hydroxyethyl sulfonate 28 Sodium stearate 12.4 90 / 10 soap 6.2 Cocamidopropyl Betaine 4.5 Lauric acid 3.5 water 7.5 other 3.9

[0134] TAXT: 2246; 36.0℃

[0135] Example 14

[0136] composition weight% stearic acid 34.6 Sodium lauroyl hydroxyethyl sulfonate 28 Sodium stearate 12.4 90 / 10 soap 6.2 Cocamidopropyl Betaine 3.9 Lauric acid 3.5 water 7.5 other 3.9

[0137] TAXT: 2452; 35.2℃

[0138] Example 15

[0139]

[0140]

[0141] TAXT: 2065; 33.4℃

[0142] Example 16

[0143] composition weight% stearic acid 34.3 Sodium lauroyl hydroxyethyl sulfonate 30.5 Sodium stearate 18.3 Sodium methylcocoyl taurate 2 Lauric acid 3.4 water 7.5 other 4

[0144] Example 17

[0145] composition weight% stearic acid 32.7 Sodium lauroyl hydroxyethyl sulfonate 30 Sodium stearate 16.2 90 / 10 soap 1.8 Sodium methylcocoyl taurate 3 Lauric acid 3.4 water 9 other 3.9

[0146] TAXT: 2731; 35.2℃

[0147] Example 18

[0148]

[0149]

[0150] TAXT: 2867; 38.4℃

[0151] Example 19

[0152] composition weight% stearic acid 30 Sodium lauroyl hydroxyethyl sulfonate 32 Sodium stearate 12.4 90 / 10 soap 6.2 Cocamidopropyl Betaine 3.9 Lauric acid 3.6 water 7.4 other 4.5

[0153] TAXT: 3064; 39.3℃

[0154] Example 20

[0155] composition weight% stearic acid 31.5 Sodium lauroyl hydroxyethyl sulfonate 30 Sodium stearate 12.4 90 / 10 soap 6.2 Cocamidopropyl Betaine 4.5 Lauric acid 3.4 water 7.5 other 4.5

[0156] TAXT: 2652; 37.0℃

[0157] Example 21

[0158] composition weight% stearic acid 35 Sodium lauroyl hydroxyethyl sulfonate 30 Sodium stearate 11 90 / 10 soap 5.5 Sodium methylcocoyl taurate 3.9 Lauric acid 3.4 water 7.5 other 3.7

[0159] TAXT: 1831; 33.1℃

[0160] Examples 22-25

[0161] In these embodiments, the active ingredient and the fatty acid:soap ratio varied. Example 23 contained a 1:1 fatty acid:soap ratio, while Examples 22, 24, and 25 had a fatty acid:soap ratio of 1.8:1. The amount of active ingredient varied between sodium lauroyl hydroxyethyl sulfonate, stearic acid, and combinations of soap noodles and sodium stearate. The amounts of all components are listed as a weight percentage.

[0162] Data were collected from a 7-day Forearm Controlled Application Test (FCAT). All measurements were acquired on the afternoon of day 7. SKICON was measured as the area under the curve. TEWL was measured as the change relative to baseline. The index was measured as the SKICON / TEWL ratio. Higher SKICON values ​​and lower TEWL values ​​were expected, while higher values ​​of the index were preferred over lower values.

[0163] Examples 22-25

[0164]

[0165] *SLI = Sodium lauroyl hydroxyethyl sulfonate

[0166] A typical response to improve overall performance is to reduce the amount of active ingredient (i.e., reduce the level of synthetic detergent). Reducing the level of active ingredient can be helpful for a gentler formulation that is less harmful to the consumer's skin. This was done in Examples 22 and 23, where the amount of SLI was reduced from 54% to 38%, but the fatty acid to soap ratio changed from 1.8:1 to 1:1. The results show that the fatty acid to soap ratio plays a role in achieving the desired results. When the amount of active ingredient is reduced and the fatty acid to soap ratio is disregarded, the SKICON, TEWL, and index values ​​are all affected. More simply, simply reducing the activity without maintaining an effective fatty acid to soap ratio will not result in a clinically improved formulation. Surprisingly, it has been found that by reducing the amount of active ingredient in the composition and balancing the structured system (i.e., the fatty acid to soap ratio), a gentle, well-foaming, consumer-acceptable formulation can be created.

[0167] It should be noted that, regarding the cleaning compositions and preparation methods disclosed herein, unless otherwise expressly stated, all figures indicating amounts of materials or reaction conditions, physical properties of materials, and / or the use of materials should be understood as being modified by the word “about.” Unless otherwise stated, all amounts are by weight of the final composition.

[0168] It should be noted that when specifying any concentration or amount range, any particular upper limit concentration can be associated with any particular lower concentration or amount and any subranges contained therein. In this regard, it should be noted that all ranges disclosed herein include endpoints, and endpoints are independently combined with each other (e.g., a range of “up to 25% by weight, or more specifically, 5% to 20% by weight” includes the endpoints of the 5% to 25% by weight range and all intermediate values, etc.). “Combination” includes blends, mixtures, alloys, reaction products, etc. Furthermore, the terms “first,” “second,” etc., used herein do not indicate any order, quantity, or importance, but are used to distinguish one element from another. The terms “a,” “an,” and “the” do not indicate a quantitative limitation herein, but should be interpreted to encompass both the singular and plural, unless otherwise stated herein or clearly contradicted by the context. The suffix “(s)” used herein is intended to include both the singular and plural of the term it modifies, thereby including one or more of that term (e.g., membrane(s) includes one or more membranes). Throughout this specification, references to "an embodiment," "an aspect," "another embodiment," "another aspect," "an embodiment," "an aspect," etc., indicate that a specific element (e.g., a feature, structure, and / or characteristic) described in connection with that embodiment or aspect is included in at least one embodiment or aspect described herein, and may or may not be present in other embodiments or aspects. Furthermore, it should be understood that the described elements may be combined in any suitable manner across various embodiments or aspects.

[0169] All cited patents, patent applications, and other references are incorporated herein by reference in their entirety. However, if any terminology in this application contradicts or conflicts with terminology in the incorporated references, the terminology in this application shall take precedence over the conflicting terminology in the incorporated references. While specific aspects have been described, the applicant or others skilled in the art may conceive of alternatives, modifications, variations, improvements, and substantial equivalents that are not currently foreseen or may not be foreseen. Therefore, the appended claims, both submitted and potentially amended, are intended to cover all such alternatives, modifications, variations, improvements, and substantial equivalents.

[0170] To avoid ambiguity, the word "comprising" is intended to mean "including," but not necessarily "consisting of" or "composed of." In other words, the listed steps, options, or alternatives do not need to be exhaustive.

[0171] The disclosure of the invention present herein should be considered to cover all aspects present in the claims, as if they were referenced multiple times to each other, regardless of the fact that the claims may exist without multiple dependencies or redundancy. Unless otherwise stated, numerical ranges expressed in the format "from x to y" should be understood to include both x and y. When specifying a range of any value or quantity, any particular upper limit value or quantity may be associated with any particular lower limit value or quantity. Unless otherwise stated, all percentages and ratios contained herein are by weight. Various features of the invention referenced in the individual sections above are suitably applied to other sections with necessary modifications. Thus, a feature specified in one section may be suitably combined with features specified in other sections. Any section headings are added for convenience only and are not intended to limit this disclosure in any way.

Claims

1. A cleaning composition comprising: 25% to 35% by weight of surfactant; 1.5% to 5% by weight of co-surfactant; 5% to 9% by weight of water; and A mixture of 50% to 60% by weight of fatty acids and soap, wherein the ratio of fatty acids to soap is 2.3:1 to 1.8:1, wherein the fatty acids are selected from lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, linoleic acid, lanonic acid, isostearic acid, arachidonic acid, hydroxystearic acid, or combinations thereof.

2. The cleaning composition according to claim 1, wherein the fatty acid is selected from stearic acid, palmitic acid, or a combination thereof.

3. The cleaning composition according to claim 1, wherein the surfactant is cocamidopropyl hydroxysulfonate, cocamidosulfosuccinate, sodium lauroyl hydroxyethyl sulfonate, or a combination thereof.

4. The cleaning composition according to claim 1, wherein the surfactant is sodium lauroyl hydroxyethyl sulfonate, cocamidosulfonate, or a combination thereof.

5. The cleaning composition according to any one of claims 1-4, wherein the surfactant is present in an amount of 25% to 32% by weight.

6. The cleaning composition according to any one of claims 1-4, wherein the surfactant is present in an amount of 26% to 32% by weight.

7. The cleaning composition according to any one of claims 1-4, wherein the co-surfactant comprises cocamidopropyl betaine, sodium methylcocoyl taurate, sodium cocoyl glycinate, methyl ester sulfonate, or fatty acid ester sulfonate.

8. The cleaning composition according to any one of claims 1-4, wherein the soap is a neutralized fatty acid.

9. The cleaning composition according to any one of claims 1-4, wherein the soap is a salt of aliphatic alkane or olefin monocarboxylic fatty acid.

10. The cleaning composition of claim 8, wherein the soap comprises 6 to 22 carbon atoms.

11. The cleaning composition of claim 8, wherein the soap comprises 8 to 18 carbon atoms.

12. The cleaning composition according to claim 8, wherein the neutralized fatty acid is selected from lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, linoleic acid, lanonic acid, isostearic acid, arachidonic acid, hydroxystearic acid, or combinations thereof.

13. The cleaning composition of claim 8, wherein the neutralized fatty acid is selected from stearic acid, palmitic acid, or a combination thereof.

14. The cleaning composition according to any one of claims 1-4, wherein the soap comprises lauric acid and a mixture of acids selected from myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, linoleic acid, lanolic acid, isostearic acid, arachidonic acid, hydroxystearic acid, or combinations thereof.

15. The cleaning composition according to claim 14, wherein lauric acid is present in the mixture of fatty acids and soap in an amount of 80% by weight.

16. The cleaning composition of claim 14, wherein lauric acid is present in the mixture of fatty acids and soap in an amount of 85% by weight.

17. A method for preparing a cleaning strip, comprising: The cleaning composition according to any one of claims 1-16 is heated to a temperature sufficient to provide a molten composition; Cool the molten composition to form sheets and / or fragments; Refining the sheets and / or fragments to form a billet; and The blank is stamped and / or cut to form the cleaning strip.

18. The method of claim 17, wherein the cleaning composition is heated to a temperature of at least 100°C.

19. The method of claim 17, wherein the billet has a TAXT reading of 1,000 to 4,000.

20. A method for preparing a cleaning strip, comprising: The cleaning composition according to any one of claims 1-16 is heated to a temperature sufficient to provide a molten composition; Pour the molten composition into a mold; Cool the molten composition until the cleaning strip is formed; and Remove the cleaning strip from the mold.

21. The method of claim 20, wherein the cleaning composition is heated to a temperature of at least 100°C.

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