Short chain-free strip composition comprising C18: 3 soap

Abstract

Disclosed is a cleansing strip composition comprising: 3 to 20 wt% of a C18: 3 soap, preferably 6 to 15 wt% of a C18: 3 soap, more preferably 10 to 15 wt% of a C18: 3 soap, based on the total weight of the cleansing strip composition, based on the total weight of the cleansing strip composition, where the cleansing strip composition comprises less than 0.5 wt% of a C8 to C14 soap, based on the total weight of the cleansing strip composition.

Description

Technical Field

[0001] This document discloses a cleansing strip composition. The cleansing strip comprises a composition containing C18:3 soap. The cleansing strip is extrudable. The cleansing strip has the desired foaming effect while being substantially free of short-chain soaps. Background Technology

[0002] There is always a need for skin cleansing formulations that provide the desired cleansing effect rather than harshness, do not cause skin problems, and have the ability to deliver beneficial agents (such as moisturizers, antibacterial active substances, etc.).

[0003] Soap in cleaning strip compositions is generally known to serve several purposes. First, it helps to structure the strips so that they do not break when they are finished (e.g., extruded, stamped) and used as final strips. Fatty acid soaps also provide some beneficial properties, such as good lathering and a certain skin feel that consumers may expect. Furthermore, soap is generally cheaper than most anionic surfactants, thus saving costs.

[0004] Short-chain soaps (e.g., C8-C14) are considered essential for the desired lathering in soap bars. Therefore, commercial soap bars contain various levels of short-chain soaps (e.g., C8-C14) made from palm kernel oil or coconut oil containing short-chain triglycerides, or from fatty acids derived from these oils.

[0005] Short-chain-free soap bars are disclosed in International Application No. WO 2021 / 164994. These bars comprise C18:2 soap and C18:1 soap, wherein the weight ratio of C18:2 soap to C18:1 soap in the composition must be greater than 0.7. While this composition does not contain short-chain soap, it provides bars with good foaming properties and can be prepared by a rapid extrusion process. To achieve the specific C18:2 to C18:1 ratio, i.e., greater than 0.7, the soap bars disclosed in International Application No. WO 2021 / 164994 are made from unconventional oils such as soybean oil (C18:2 / C18:1=2.4) and hydrogenated soybean oil, or suitable mixtures of these oils with conventional palm oil and palm stearin oil (C18:2 / C18:1=0.24), or fatty acids derived from these oils. International application number WO 2021 / 164994 discloses that soap can also be made from other unconventional oil sources (such as corn, rice bran, cottonseed and safflower oil).

[0006] U.S. Patent No. 5,874,392 discloses a multipurpose soap bar that can be used for cleaning the human body as well as shampooing and conditioning hair. The disclosed bar contains at least 11% by volume of C8 to C14 soap.

[0007] It is highly desirable to find other oils besides those currently disclosed that can be used in cleaning bar compositions that are substantially free of short chains, contain no short chains, or have a reduced amount of short chains, to provide a cleaning bar with a combination of good foaming and good processability on high-speed extrusion and stamping soap production lines. It is also desirable to find a cleaning bar composition that is substantially free of short chains, contains no short chains, or has a reduced amount of short chains, to provide a cleaning bar that is not constrained by a C18:2 / C18:1 ratio greater than 0.7 and allows for greater use of conventional oils such as palm oil with a C18:2 / C18:1 ratio of 0.24.

[0008] Therefore, there has always been a need for cleaning strip compositions that can produce cleaning strips with low soap content without the corresponding loss of desired cleaning strip properties such as foam. Summary of the Invention

[0009] Cleaning strips and their compositions are disclosed in various aspects.

[0010] The cleaning strip composition comprises 3 to 20% by weight of C18:3 soap based on the total weight of the cleaning strip composition, preferably 6 to 15% by weight of C18:3 soap based on the total weight of the cleaning strip composition, more preferably 10 to 15% by weight of C18:3 soap, wherein the cleaning strip composition comprises less than 0.5% by weight of C8 to C14 soap based on the total weight of the cleaning strip composition.

[0011] These and other features and characteristics are described in more detail below. Detailed Implementation

[0012] This document discloses a cleansing soap bar composition that, while substantially free of or free of short-chain soaps, also includes the desired foaming properties. Short chains, as referred to herein, generally mean C8 to C14. "Substantially free," "substantially free of," or "truly free of" as used herein means less than 0.5% by weight, preferably less than 0.3% by weight, most preferably less than 0.15% by weight, or less than 0.1% by weight, or 0.05% by weight, or 0.04 to 0.01% by weight, or 0.0% by weight (none) based on the total weight of the cleansing bar composition. For example, "substantially free of," "truly free of," or "truly free of" may refer to 0.00 to 0.5% by weight of the whole composition, such as 0.0001 to 0.5% by weight, such as 0.005 to 0.5% by weight, such as 0.001 to 0.1% by weight. The cleansing bar can be produced by extrusion and stamping. It may be desirable to eliminate or reduce short-chain soaps in the bar without impairing foaming, as reducing short-chain soaps can lead to enhanced bar gentleness on the skin, improved deposition of beneficial active substances for the skin, and longer-lasting fragrance benefits. Natural sources of these short-chain ingredients include coconut oil and palm kernel oil. Demand for these oils continues to rise because they are not only prevalent in soap bars but also in many personal care products such as shower gels and shampoos. Therefore, from a sustainability perspective, cleansing bars that are essentially free of, contain no, or have reduced amounts of short-chain soaps may be attractive, as they reduce some of the reliance on these highly sought-after ingredients.

[0013] Surprisingly, it has been found that the compositions disclosed herein, using 3 to 20% by weight of C18:3 soap comprising the cleaning strip composition, such as 4 to 18% by weight of C18:3 soap comprising the cleaning strip composition, such as 5 to 16% by weight of C18:3 soap comprising the cleaning strip composition, such as 6 to 15% by weight of C18:3 soap comprising the cleaning strip composition, such as 10 to 15% by weight of C18:3 soap comprising the cleaning strip composition, can provide cleaning strips with desired foaming and stability (e.g., storage stability, color stability, etc.). Even if the cleaning strip contains C18:3 chains with high unsaturation (e.g., three double bonds in a soap molecule), the cleaning strip can still be storage stable. Furthermore, for the cleaning strip compositions disclosed herein, methods for preparing cleaning strips that allow for greater use of oils such as palm oil, palm stearin, or combinations thereof can also be used.

[0014] Surprisingly, cleaning strips made from the cleaning strip compositions disclosed herein exhibit the desired foaming properties. The cleaning strip compositions may contain C18:3 soaps derived from linseed oil. For example, cleaning strips made using the cleaning strip compositions disclosed herein may contain C18:3 soaps made from linseed oil, hydrogenated oils, or combinations thereof. For example, hydrogenated oils may include soybean oil, palm oil, or combinations thereof. Strips made from such compositions can have the desired foaming and hardness. Strips made from such compositions can also be processed using any strip manufacturing process, including processing on rapid extrusion and stamping soap bar manufacturing lines.

[0015] Flaxseed oil can promote skin smoothness and hydration. It can also help prevent skin irritation and redness. Without being bound by theory, it is believed that not only oils (such as triglycerides) but also fatty acids contribute to these effects. In a recent study, Kendall AC, Kiezel-Tsugunova M, Brownbridge LC, Harwood JL, Nicolaou A, Lipid functions in skin: Differential effects of n-3 polyunsaturated fatty acids on cutaneous ceramides, in a human skin organculture model, Biochem Biophys Acta Biometer, Sep 2017; 1859(9 Pt B):1679-1689. doi:10.1016 / j.bbamem. 2017.03.016. Electronic publication 21 March 2017. PMID: 28341437; PMCID: PMC5504780. Polyunsaturated fatty acids such as C18:3 are considered therapeutic agents in many inflammatory skin conditions, thereby altering the lipid distribution and the production of bioactive cells in the skin. The skin converts triglycerides into fatty acids, which can be used to produce ceramides. Due to its low natural pH of approximately 5.5 and high buffering capacity, the skin can convert deposited soaps into fatty acids. Conventional soap bars contain only trace amounts of C18:3 soap, while bars made from the cleaning bar compositions disclosed herein may contain 3 to 20% by weight of the cleaning bar composition, for example, 4 to 18% by weight of the cleaning bar composition, 5 to 16% by weight of the cleaning bar composition, or 6 to 15% by weight of the cleaning bar composition, to produce cleaning bars, for example, 10 to 15% by weight of the cleaning bar composition. Bars made from the cleaning bar compositions disclosed herein may have a smoothness, increased hydration, and increased anti-inflammatory effect comparable to cleaning products in which linseed oil is incorporated as an absolute oil.

[0016] When linseed oil is blended with oils such as palm oil or palm stearin, the resulting soap bars may be excessively soft and lack foaming ability. Surprisingly, it has been found that hardness and foaming ability can be improved to desired levels using a method comprising the following steps: neutralizing a first fatty acid blend containing 15% or more C18:3 chains in a first stream to produce a first long-chain soap, for example, 15% to less than 50% C18:3 chains in the first stream, for example, 20% to less than 50% C18:3 chains in the first stream, for example, 25% to less than 50% C18:3 chains in the first stream; neutralizing a second fatty acid blend containing saturated long chains, unsaturated long chains, or combinations thereof in a second stream to produce a second long-chain soap; and combining and blending the first and second long-chain soaps to produce a cleaning bar composition. The cleaning bar composition can then be formulated into cleaning bars, wherein the cleaning bars may have the desired foaming properties and desired hardness. In one embodiment, the first fat stream may contain 15% to 49.9% of C18:3 chains, such as 20% to 49.9% of C18:3 chains, such as 25% to 49.9% of C18:3 chains.

[0017] The first fatty acid blend may contain 50% or more of C16 and C18 chains, for example, 50% to 85% of C16 and C18 chains, for example, 50% to 75% of C16 and C18 chains. The second fatty acid blend may contain 100% by weight of a combination of palm oil and palm stearin oil. In one embodiment, the second fatty acid blend contains 100% by weight of a combination of palm oil and palm stearin oil. In the combination, palm oil may be present in amounts from 0% to 50% by weight, for example, 25% by weight, 30% by weight, 35% by weight, 40% by weight, 45% by weight, or 50% by weight, including any and all ranges and combinations contained therein. Furthermore, in the combination, palm stearin oil may be present in amounts from 50% to 100% by weight, such as 50% by weight, such as 55% by weight, such as 60% by weight, such as 65% by weight, such as 70% by weight, such as 75% by weight, such as 80% by weight, such as 85% by weight, such as 90% by weight, such as 95% by weight, such as 100% by weight, including any and all ranges and combinations contained therein.

[0018] The bars prepared by the methods disclosed herein may be substantially free of C8 to C14 soap. The bars prepared by the methods disclosed herein may contain 0% by weight of C8 to C14 soap.

[0019] In the strips produced by the above method, the total weight percentage of C18:1 and C18:2 present in the cleaning strip composition may be greater than the total weight percentage of C18:3 present in the strip, and the ratio of (C18:3+C18:2) / C18:1 may be less than 0.7.

[0020] As described herein, a cleaning strip refers to a cleaning strip composition comprising 3 to 20% by weight of C18:3 soap, preferably 6 to 15% by weight of C18:3 soap, wherein the cleaning strip composition is in the form of a shaped solid. Cleaning strips are particularly suitable for personal hygiene. Cleaning strips are wash-off products that typically contain a certain amount of surfactant for cleaning desired localized surfaces, such as the body, hair, scalp, and / or face. The cleaning strip is applied to the localized surface and left there for only a few seconds or minutes, then rinsed off with plenty of water.

[0021] As mentioned in this article, soap refers to a salt of fatty acids. Soap can be a soap of C8 to C24 fatty acids, preferably with a C value greater than 14, such as C16 to C24, such as C18, such as C18:3. The basic structure of soap includes a long hydrophobic (hydrophobic) hydrocarbon "tail" and a hydrophilic (hydrophilic) anionic "head": CH3(CH2) n COO- The length (“n”) of the hydrocarbon chain varies depending on the type of fat or oil. The anionic charge on the carboxylate (COO-) head is usually due to the positively charged potassium (K) group. + ) or sodium (Na) + Cation balance. The cleaning strip compositions disclosed herein generally do not contain or contain low molecular weight soaps (C8 to C14 soaps) that are typically water-soluble. For example, a cleaning strip composition may be substantially free of C8 to C14 soaps, for instance, a cleaning strip composition may contain 0% by weight of C8 to C14 soaps.

[0022] The soap may be present in an amount less than 20% by weight of the cleaning strip composition. For example, the soap may be present in amounts of 0%, 2.5%, 3%, 5%, 7.5%, 10%, 12.5%, 15%, 16%, or 20% by weight, including any and all ranges contained herein, and wherein weight% refers to the weight percentage present in the overall cleaning strip composition. For example, the soap may be present in amounts of 3 to 20% by weight, preferably 4 to 18% by weight, more preferably 5 to 17% by weight, and even more preferably 6 to 15% by weight, including any and all ranges and values ​​contained herein.

[0023] The cleaning strip composition may contain saturated long-chain soap, unsaturated long-chain soap, or a combination thereof.

[0024] Saturated long-chain soaps may contain C16 soaps, C18 soaps, or combinations thereof. Unsaturated long-chain soaps may contain C18:1 soaps, C18:2 soaps, or combinations thereof.

[0025] The cleaning strip compositions disclosed herein can be extruded and formed into strips. The strips may contain the cleaning strip compositions disclosed herein. The cleaning strip compositions and strips made therefrom may have a pH of 9.5 to 11, for example 10 to 11, such as 10.5 to 11.

[0026] The cleaning strip composition may additionally contain a surfactant. The surfactant may be present in an amount less than or equal to 40% by weight of the total cleaning strip composition. For example, the surfactant may be present in an amount less than or equal to 30% by weight of the total cleaning strip composition, such as less than or equal to 25% by weight of the total cleaning strip composition, such as 10% to 24% by weight of the total cleaning strip composition.

[0027] Surfactants may include anionic surfactants, amphoteric surfactants, amphoteric surfactants, cationic surfactants, nonionic surfactants, or combinations thereof.

[0028] When present, the anionic surfactant used may include aliphatic sulfonates, such as primary alkanes (e.g., C8-C64). 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., C...). 12 -C 18 Alkyl sulfates or alkyl ether sulfates (including alkyl glycerol ether sulfates). Alkyl ether sulfates include those having the following formula: RO(CH2CH2O) n SO3M 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, and most preferably 1 to 4, and M is a solubilizing cation such as sodium, potassium, ammonium, or substituted ammonium.

[0029] Anionic surfactants can also be alkyl sulfonyl succinates (including monoalkyl and dialkyl, such as 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.

[0030] Sulfosuccinates can be monoalkyl sulfosuccinates having the following formula: R 1 OC(O)CH2CH(SO3M)CO2M; and The following formula is amide-MEA sulfosuccinate: R 1 CONHCH2CH2OC(O)CH2CH(SO3M)CO2M Where R 1 The range is C8-C 22 alkyl.

[0031] Sarcosine salts are usually represented by the following formula: R 2 CON(CH3)CH2CO2M, where R 2 The range is C8-C 20 alkyl.

[0032] Taurine salts are usually represented by the following formula: R 3 CONR 4 CH2CH2SO3M Where R 3 It is C8-C 20 Alkyl, R 4 It is a C1-C4 alkyl group.

[0033] M is a solubilizing cation as described above.

[0034] The cleaning strip compositions disclosed herein may contain C8-C 18 Acyl hydroxyethyl sulfonates. These esters are prepared by reaction of 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.

[0035] 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 Polyalkoxylated Isethonic Acid,” issued February 28, 1995; which is incorporated herein by reference. Such compounds have the following general formula: R 5 C-(O)-OC(X)HC(Y)H-(OCH2-CH2) m -SO3M Where R 5It 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.

[0036] In the cleaning strip 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, SinoLion, Stepan Company, and Innospec.

[0037] Optionally, an amphoteric surfactant may be included in the cleaning strip compositions disclosed herein. The amphoteric surfactant (which may be zwitterionic depending on pH) includes sodium acylamphoacetate, sodium acylamphopropionate, disodium acylamphodiacetate, and disodium acylamphodiapropionate, wherein the acyl group (i.e., alkyl acyl group) may contain C7-C. 18 Alkyl moiety. Illustrative examples of amphoteric surfactants include sodium lauroylamphoacetate, sodium cocoamphoacetate, sodium lauroylamphoacetate, or combinations thereof.

[0038] Regarding the zwitterionic surfactants used in the cleaning strip compositions of the present invention, such surfactants comprise at least one acid group. Such acid groups can be carboxylic acid or sulfonic acid groups. They typically include quaternary nitrogen groups, and therefore can be quaternary amino acids. They should typically comprise an alkyl or alkenyl group with 7 to 18 carbon atoms, and generally conform to the following overall structural formula: R 6 -[-C(O)-NH(CH2) q -] r -N + (R 7 (R) 8 )-AB 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 carboxyalkyl group having 1 to 3 carbon atoms; q is 2 to 4; r is 0 to 1; A is an alkylene group having 1 to 3 carbon atoms optionally substituted with a hydroxyl group, and B is -CO2- or -SO3-.

[0039] The desired zwitterionic surfactant used in the cleaning strip compositions disclosed herein and within the above general formula includes simple betaine of the following formula: R 6-N + (R 7 (R) 8 )-CH2CO2 - And the following amide betaine: R 6 -CONH(CH2) t -N + (R 7 (R) 8 )-CH2CO2 - , Where t is 2 or 3.

[0040] In both equations, R 6 R 7 and R 8 As previously defined. 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 groups constitute a mixture. 6 It has 10 to 14 carbon atoms. R 7 and R 8 The preferred form is methyl.

[0041] A further possibility is that the zwitterionic surfactant is sulfobetaine of the following formula: R 6 -N + (R 7 (R) 8 )-(CH2)3SO3 - or R 6 -CONH(CH2) u -N + (R 7 (R) 8 )-(CH2)3SO3 - Where u is 2 or 3, or where -(CH2)3SO3 - -CH2C(OH)(H)CH2SO3 - These are alternative variations.

[0042] In these formulas, R 6 R 7 and R 8 As defined above.

[0043] Illustrative examples of desired zwitterionic surfactants include betaines such as lauryl betaine, citrate betaine, cocamidopropyl betaine, cocamidopropyl betaine, cocamidopropyl dimethyl betaine, and lauramide propyl betaine. Other suitable zwitterionic surfactants include cocamidopropyl sulfonyl betaine, such as 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)dihydroxymethylammonium hydroxide, cocamidopropyl 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 strip compositions disclosed herein.

[0044] Nonionic surfactants may optionally be used in cleaning strip compositions. When used, nonionic surfactants are typically used at levels as low as 0.5 wt%, 1 wt%, 1.5 wt%, or 2 wt% and as high as 6 wt%, 8 wt%, 10 wt%, or 12 wt%. Nonionic surfactants that may be used particularly include compounds having hydrophobic groups and reactive hydrogen atoms (e.g., aliphatic alcohols, acids, amides, or alkylphenols) reacting with alkyl oxides (especially ethylene oxide alone or ethylene oxide with propylene oxide). Specific nonionic surfactant compounds are alkyl (C6-C6) compounds. 22 ) Phenols, ethylene oxide condensates, aliphatic (C8-C) 18 Condensation products of straight-chain 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.

[0045] In one aspect, nonionic surfactants may include fatty acid / alcohol ethoxylates having the following structures: 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; and 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; and 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; and z is 5 to 50. In another aspect, i and k are each independently 6 to 12; and z is 15 to 35.

[0046] Nonionic surfactants may also include glycoamides, such as polysaccharide amides. Specifically, the surfactant may be one of the lactosamides described in U.S. Patent No. 5,389,279, entitled “Compositions Comprising Nonionic Glycolipid Surfactants”, issued February 14, 1995, by Au et al.; or may be one of the glycoamides described in U.S. Patent No. 5,009,814, entitled “Use of N-Poly Hydroxyalkyl FattyAcid Amides as Thickening Agents for Liquid Aqueous Surfactant Systems”, issued April 23, 1991, by Kelkenberg; by introduction and inclusion in this application.

[0047] Illustrative examples of nonionic surfactants that may optionally be used in the cleaning strip compositions disclosed herein include, but are not limited to, polysaccharides, cetyl alcohol, decyl glucoside, lauryl glucoside, octaethylene glycol monododecyl ether, n-octyl β-D-thiopyranoside, octyl glucoside, oleyl alcohol, polysorbate, sorbitol, stearyl alcohol, or combinations thereof.

[0048] In one aspect, cationic surfactants may optionally be used in the cleaning strip compositions of this application.

[0049] One class of cationic surfactants includes heterocyclic ammonium salts, such as hexadecyl or stearylpyridinium chloride, methylsulfate alkyl amide ethylpyrroleium, and lapiroxium chloride.

[0050] Tetraalkylammonium salts are another class of useful cationic surfactants. Examples include cetyl or stearyl trimethylammonium chloride or ammonium bromide; hydrogenated palmitate or tallow trimethylammonium halide; docosyl trimethylammonium halide or methyl ammonium sulfate; decyl isononyl dimethylammonium halide; ditow tallow (or distearate) dimethyl ammonium halide and docosyl dimethyl ammonium chloride.

[0051] 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-based ammonium chloride, PEG 15 stearyl ammonium chloride, dipalmitoyl ethyl methyl ammonium chloride, dipalmitoyl hydroxyethyl methyl sulfate, and stearylamidopropyl dimethylamine lactate.

[0052] Other useful cationic surfactants include quaternized hydrolysates of silk, wheat, and keratin, and mixtures of the above-mentioned cationic surfactants are also within the scope of cleaning strip compositions.

[0053] If used, the cationic surfactant comprises no more than 1.0% by weight of the cleaning strip composition. When present, the cationic surfactant typically comprises 0.01 to 0.7% by weight of the cleaning strip composition, and more typically 0.1 to 0.5% by weight, including all ranges contained herein.

[0054] The cleansing strip may additionally contain up to 30% by weight of skin-beneficial agents. The term "skin-beneficial agent" is defined as a substance that softens or improves the elasticity, appearance, and youthful appearance of the skin (stratum corneum) by increasing its water content, adding or replacing lipids and other skin nutrients, or both, and maintains its softness by delaying the decrease in its water content. Suitable skin-beneficial agents include emollients, including, for example, hydrophobic emollients, hydrophilic emollients, or blends thereof. Preferred beneficial agents include moisturizers, emollients, sunscreens, and anti-aging compounds.

[0055] Ideally, optional skin-beneficial agents used in the cleansing strip compositions disclosed herein include niacinamide (vitamin B3), tocopherol (vitamin E), aloe vera, α-hydroxy acids and esters, β-hydroxy acids and esters, hydroxyethyl urea, polyhydroxy acids and esters, creatine, hydroquinone, tert-butylhydroquinone, mulberry extract, hyaluronic acid and its salts (including, but not limited to, their Na+ and K+ salts), extracts, licorice extract, resorcinol derivatives, or combinations thereof. For example, the skin-beneficial agent may be sodium hyaluronate. Based on the total weight of the cleansing strip composition, such beneficial agents including sodium hyaluronate may be present in amounts from 0.0001 to 10% by weight, for example from 0.001 to 6.5% by weight, for example from 0.01 to 3.5% by weight, and in amounts such as 0.01% by weight, including all values ​​and ranges contained herein.

[0056] Other optional water-soluble skin beneficiaries include acids, such as amino acids like arginine, valine, or histidine. Other vitamins can be used, such as vitamin B2, pyridineamide, panthenol (vitamin B5), vitamin B6, vitamin C, and combinations thereof. Derivatives (generally referring to substances already developed or obtained from other substances), especially water-soluble derivatives of these vitamins, can also be used. For example, vitamin C derivatives, such as ascorbate tetraisopalmitate, ascorbate magnesium phosphate, and ascorbate glycoside, can be used alone or in combination with each other. Niacinamide derivatives, such as nicotinamide adenine dinucleotide (NADH) and nicotinamide adenine dinucleotide phosphate (NADPH), can be used alone or in combination with each other. Other skin beneficiaries that can be used include 4-ethylresorcinol, extracts such as sage, aloe vera, green tea, sugarcane, citrus, grape seed, thyme, chamomile, yarrow, cucumber, licorice, rosemary extracts, or combinations thereof. Electrolytes, such as NaCl and / or KCl, MgCl2, can also be used. When present in the compositions disclosed herein, the total amount of optional water-soluble beneficial agents (including mixtures) may be from 0.0001 to 10% by weight, preferably from 0.001 to 6.5% by weight, and most preferably from 0.01 to 3.5% by weight, based on the total weight of the cleaning strip composition, including all values ​​and ranges contained herein.

[0057] Optionally, oil-soluble beneficial agents may also be included in the cleaning strip compositions. Illustrative examples of types of oil-soluble beneficial agents that may be optionally used in the cleaning strip compositions disclosed herein include components such as stearic acid, vitamins such as vitamins A, D, E and K (and their oil-soluble derivatives).

[0058] Other optional oil-soluble beneficial agents used include resorcinols and resorcinol derivatives, such as 4-hexylresorcinol, 4-phenylethylresorcinol, 4-cyclopentylresorcinol, 4-cyclohexylresorcinol, 4-isopropylresorcinol, or combinations thereof. Additionally, 5-substituted resorcinols, such as 4-cyclohexyl-5-methylphenyl-1,3-diol, 4-isopropyl-5-methylphenyl-1,3-diol, and combinations thereof, can be used. 5-substituted resorcinols and their synthesis are described in commonly assigned U.S. Patent Application Publication No. 2016 / 0000669A1.

[0059] Other usable oil-soluble beneficial agents include ω-3 fatty acids, ω-6 fatty acids, clomiphene, magnolol, and honokiol, farnesol, ursolic acid, myristic acid, geraniol, oleoyl betaine, cocoyl hydroxyethyl imidazoline, hexanoyl sphingosine, 12-hydroxystearic acid (12HSA), petropicrin, conjugated linoleic acid, stearic acid, palmitic acid, lauric acid, terpineol, and thymol essential oil components selected from the following dissolving aids: limonene, pinene, camphene, cymene, citronellol, citronellol, geraniol, hesperidin, linalool, rose alcohol, borneol, isoborneol, menthone, camphor, safrole, isosafrole, eugenol, isoeugenol, tea tree oil, eucalyptus oil, peppermint oil, neem oil, lemongrass oil, orange peel oil, bergamot oil, or combinations thereof.

[0060] Another optional oil-soluble beneficial agent that can be used is a retinoic acid precursor. The retinoic acid precursor can be retinol, retinaldehyde, retinyl ester, retinyl propionate, retinyl palmitate, retinyl acetate, or combinations thereof. Retinyl propionate, retinyl palmitate, and combinations thereof are generally preferred. Yet another retinoic acid precursor used is hydroxyanisole retinyl ester, marketed under the trade name REXEXTRA®, available from Molecular Design International. It can be used in combination with any of the oil-soluble beneficial agents described herein.

[0061] When an optional (i.e., 0.0 to 1.5% by weight) oil-soluble beneficial agent is used in the cleaning strip composition, it is generally present in an amount of 0.001 to 1.5% by weight of the total cleaning strip composition, including all values ​​and ranges contained herein, and for example, 0.05 to 1.2% by weight of the total weight of the cleaning strip composition, such as 0.2 to 0.5% by weight.

[0062] Other beneficial skin agents include the following: (a) Silicone oils and their modifiers, 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; beef 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, cetacean wax, beeswax, lanolin and their derivatives; (d) Hydrophobic and hydrophilic plant extracts; (e) Hydrocarbons, such as liquid paraffin, petrolatum, microcrystalline wax, ceresin, squalene, pristan, 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, lanolinic acid, isostearic acid, arachidonic acid and polyunsaturated fatty acids (PUFAs). (g) Higher alcohols, such as lauryl alcohol, cetyl alcohol, stearyl alcohol, oleyl alcohol, behenyl alcohol, cholesterol and 2-hexyldecyl alcohol; (h) Esters, such as cetyl caprylate, myristyl lactate, cetyl lactate, isopropyl myristate, myristyl myristate, 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 cedarwood, bitter orange peel, ryu, turpentine, cinnamon, bergamot, Satsuma mandarin, calamus, pine, lavender, bay leaf, clove, cypress, eucalyptus, lemon, starflower, thyme, peppermint, rose, sage, sesame, ginger, basil, juniper, lemongrass, rosemary, rosewood, avocado, grape, grape seed, myrrh, cucumber, watercress, calendula, elderflower, geranium, linden flower, amaranth, seaweed, ginkgo, ginseng, carrot, guarana, tea tree, jojoba, comfrey, oats, cocoa, orange blossom, vanilla, green tea, pennywort. royal), aloe vera, menthol, eucalyptol, eucalyptol, citral, citronella, borneol, linalool, geraniol, evening primrose, camphor, thymol, spirantol, penene, limonene, and terpene oils; (j) Polyols, such as glycerol, sorbitol, propylene glycol, etc.; and polyols, such as polyethylene glycol, examples of which are: Polyox WSR-205 PEG 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 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) Sunscreen agents, 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.

[0063] Preferred skin-beneficial agents include fatty acids, hydrocarbons, polyols, polyols, and mixtures thereof, wherein in one or more embodiments, at least one C 12 To C 12 Emollients such as fatty acids, petrolatum, glycerin, sorbitol, and / or propylene glycol are of particular interest. These agents can be added at appropriate steps in the preparation of the cleansing strips. Some beneficial agents can be introduced as a bulking agent.

[0064] During the preparation of the strips, other optional ingredients, such as antioxidants, fragrances, polymers, chelating agents, colorants, deodorants, dyes, enzymes, foaming agents, bactericides, antimicrobial agents, foaming agents, pearlescent agents, skin conditioning agents, stabilizers, or fat enriching agents, can be added in appropriate amounts. Preferably, the ingredients are added after the saponification step. Sodium metabisulfite, ethylenediaminetetraacetic acid (EDTA), borax, or ethylhexyl hydroxybisphosphonic acid (EHDP) can be added to the formulation.

[0065] Other optional ingredients that may be present in the cleaning strip composition are, for example: fragrances; isolating and chelating agents, such as tetrasodium EDTA, ethane hydroxybisphosphonate (EHDP), and etidronic acid (also known as 1-hydroxyethylidene bisphosphonate (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), pentaerythritol tetra-di-tert-butylhydroxyhydrocinnamate (e.g., TINOGARD® from BASF); stabilizers; foaming agents, such as, for example, cocoyl mono- or diethanolamide; ionized salts, such as, for example, sodium chloride and sodium sulfate; and other ingredients, such as those commonly used in cleaning strip compositions. The total amount of such other optional ingredients is typically 0 to 10% by weight based on the total weight of the personal care preparation, more specifically 0.1 to 5% by weight.

[0066] The cleaning strip compositions disclosed herein can be used to deliver beneficial antimicrobial effects. Antimicrobial agents that may be included to deliver these beneficial effects include microkinetic metals or compounds thereof. Preferred metals are silver, copper, zinc, gold, aluminum, or silver. Silver is particularly preferred. In ionic form, it can exist as a salt of any suitable oxidation state or as any compound. Preferred silver compounds are silver oxide, silver nitrate, silver acetate, silver sulfate, silver benzoate, silver salicylate, silver carbonate, silver citrate, silver phosphate, or combinations thereof, with particular interest in silver oxide, silver sulfate, and silver citrate in one or more embodiments. In at least one aspect, the silver compound is silver oxide. The content of the microkinetic metal or its compound may be from 0.0001 to 2% by weight of the composition, preferably from 0.001 to 1% by weight. Alternatively, essential oil antimicrobial active substances may be included in the cleaning strip composition. The essential oil active substances that may be included are terpineol, thymol, carvacol, (E)-2-(propenyl)phenol, 2-propylphenol, 4-pentylphenol, 4-sec-butylphenol, 2-benzylphenol, succinol, or combinations thereof. Furthermore, preferred essential oil active substances are terpineol, thymol, carvacol, thymol, or combinations thereof, with terpineol or thymol, or combinations thereof, being most preferred. When present, the content of the essential oil active substance can be from 0.001 to 1% by weight of the composition, preferably from 0.01 to 0.5% by weight.

[0067] Other ingredients that may be used include oxymethylpyrazine (pyrrolidone), zinc pyrithione, xylenol, hexadecylpyridinium chloride, and silver compounds, including silver oxide, silver nitrate, silver sulfate, silver phosphate, silver carbonate, silver acetate, silver benzoate, and combinations thereof. If used, these other components typically comprise 0.001 to 1.6% by weight of the overall cleaning strip composition, including all values ​​and ranges contained herein, and preferably 0.01 to 1.2% by weight.

[0068] Optionally, preservatives may be used in the cleaning strip compositions disclosed herein. When used, illustrative preservatives include sodium benzoate, iodopropynyl butylcarbamate, phenoxyethanol, hydroxyacetophenone, ethylhexylglycerin, methylparaben, propylparaben, imidazolidinyl urea, sodium dehydroacetate, dimethyl dimethyl (DMDM) hydantoin, and benzyl alcohol, or combinations thereof. Other suitable preservatives include sodium dehydroacetate, chlorophenyl glycerol ether, and decanediol. Preservatives are preferably used in amounts from 0.01% to 2.0% by weight of the total weight of the cleaning strip composition, including all values ​​and ranges contained therein. Preservative systems having hydroxyacetophenone alone or in mixtures with other preservatives are also preferred.

[0069] Fragrances, fixatives, opacifiers (such as titanium dioxide or ethylene glycol distearate), and chelating agents may optionally be included in the cleaning strip composition. Possible chelating agents include, but are not limited to, ethylenediaminetetraacetic acid (EDTA), diethylenetriaminepentaacetic acid (DTPA), ethylenediaminedisuccinic acid (EDDS), pentasodium diethylenetriaminepentaacetic acid, trisodium N-(hydroxyethyl)-ethylenediaminetriacetic acid, acidic forms of EDTA, sodium thiocyanate, trisodium methylglycine diacetate, tetrasodium glutamate diacetate, and phytic acid, preferably wherein the chelating agent is ethylenediaminetetraacetic acid (EDTA), diethylenetriaminepentaacetic acid (DTPA), ethylenediaminedisuccinic acid (EDDS), or combinations thereof. Each of these substances may be present in an amount of about 0.03% by weight to about 3% by weight of the total cleaning strip composition, preferably about 0.1% by weight to about 2.6% by weight, including any and all values ​​and ranges contained therein.

[0070] Strips made from the cleaning strip composition can have a hardness value greater than or equal to 2.0 kg (measured at 40°C), for example, a strip can have a hardness value greater than or equal to 2.5, for example, a strip can have a hardness value greater than or equal to 3, for example, a hardness value greater than or equal to 4, measured by the TA.XT texture analyzer described in the experimental protocol of this paper. Such hardness values ​​indicate that the strips can be processed by high-throughput extrusion processes.

[0071] The cleaning strips disclosed herein have a moisture content of 10 to 20%, preferably 12 to 16%, as measured by Karl Fischer titration.

[0072] Cleaning strip compositions can be in shaped solid form, such as strips. Cleaning strip compositions can be wash-off products that typically contain a sufficient amount of surfactant to allow them to be used to clean desired surfaces, such as localized surfaces like the entire body, hair, scalp, and / or face. Cleaning strip compositions can be applied to localized surfaces and left there for only a few seconds or minutes before rinsing off with plenty of water. Alternatively, it can be used to wash clothes. In this case, the composition or strip can typically be rubbed onto the wet clothes, optionally brushed, and then rinsed with water to remove residual soap and dirt.

[0073] In one implementation, the strip can be produced by the following method: All ingredients except the flavoring are combined in a mixer suitable for mixing viscous materials through several processes. This method is carried out at temperatures that ensure batch homogeneity, typically between 180°–240°F (80°–120°C). When the target moisture content is reached, the product is removed from the mixer and cooled, forming fragments or strips. Optionally, the cooled material is then combined with the flavoring and tumbled to ensure uniform distribution of the flavoring throughout the product. The optionally flavored material is then fed into a hopper, which feeds into a refiner, which in turn feeds into a strip press. The blanks exiting the strip press are then cut, stamped into strips, and packaged. It may be difficult to stamp blanks that are too soft (e.g., do not have a hardness of at least 1.0 kg (measured at 40°C)) into strips.

[0074] More simply, the cleaning strip composition can be made into strips by first saponifying the fat charge with alkali, and then extruding the mixture in a conventional stripping machine. The stripping machine lump can then optionally be cut into the desired size and stamped with the desired markings.

[0075] In another embodiment, when linseed oil is blended with oils such as palm oil or palm stearin, the resulting soap bars may be too soft and lack lather. This problem can be overcome by using a method comprising: neutralizing a first fatty acid blend containing 15% or more of C18:3 soap in a first stream to produce a first long-chain soap; neutralizing a second fatty acid blend containing saturated long-chain soap, unsaturated long-chain soap, or a combination thereof in a second stream to produce a second long-chain soap; and combining and blending the first and second long-chain soaps to produce a cleaning bar composition. The cleaning bar composition can then be formulated into cleaning bars, wherein the cleaning bars may have the desired lathering properties and desired hardness.

[0076] The total content of additives / fillers used in the cleaning strip composition should be no more than 50% by weight of the cleaning strip composition, preferably 1-50% by weight, more preferably 3-45% by weight.

[0077] Structurers can be included in the cleaning strip composition. Suitable starchy materials that can be used include natural starch (from corn, wheat, rice, potatoes, cassava, etc.), pregelatinized starch, various physically and chemically modified starches, and combinations thereof. The term natural starch refers to starch that has not been chemically or physically modified, also known as raw starch or natural starch. Raw starch can be used directly or modified during the preparation of the cleaning strip composition to make the starch gelatinized, partially or completely gelled. Starch can help add structure to strips prepared from the cleaning strip composition.

[0078] Silica gel can also be used as a structuring agent. The silica gel can be pre-formed silica gel, or its formation can occur in situ during the preparation of the cleaning strip. It should be understood that silica gel is a porous form of silica. Silica gel is an amorphous solid. The partial dipoles in the Si-O bonds allow silica gel to form hydrogen bonds with water molecules, and the porous nature and large surface area of ​​silica gel enable the material to readily adsorb water. According to the cleaning strip compositions disclosed herein and strips made therefrom, metal silicates can form silica gel in situ during the manufacture of the cleaning strip compositions.

[0079] Silica gel can be formed in situ by acidification of alkali metal silicates. Any metal silicate that can be converted into silica gel can be used. For example, alkali metal silicates such as sodium silicate, potassium silicate, lithium silicate, calcium silicate, or any combination thereof can be used. Alkali metal silicates can be added alone (in solid form) or in wet form (such as a slurry or solution). The alkali metal silicate component is preferably sodium silicate or optionally sodium silicate combined with another metal silicate. Sodium silicate is a water-soluble, alkaline inorganic compound, and is typically sold as an aqueous solution.

[0080] An opaque agent may optionally be present in the cleaning strip composition. When an opaque agent is present, the cleaning strip is typically opaque. Examples of opaque agents include titanium dioxide, zinc oxide, etc. A particularly preferred opaque agent that can be used when an opaque soap composition is required is ethylene glycol monostearate or ethylene glycol distearate, for example, in a 20% solution of sodium lauryl ether sulfate. An optional opaque agent is zinc stearate.

[0081] Strips made from the cleaning strip compositions disclosed herein may have a pH of 9.5 to 11, for example 10 to 11, such as 10.5 to 11.

[0082] Unless otherwise expressly stated, all figures indicating the amount of material or reaction conditions, physical properties of the material, and / or uses in this specification shall be understood to be modified by the word “about”. All quantities are by weight of the final composition unless otherwise stated.

[0083] It should be noted that when specifying any range of concentration or amount, any particular higher 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 can be combined independently of each other (e.g., "up to 25 wt%, or more specifically, a range of 5 wt% to 20 wt%", includes the endpoints of the range of 5 wt% to 25 wt% 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. Unless otherwise stated herein or clearly contradicted by the context, the terms "a," "an," and "the" used herein do not indicate a limitation of quantity, but should be interpreted to cover both the singular and plural. The suffix "(s)" as 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 "one embodiment," "one aspect," "another embodiment," "another aspect," "an embodiment," "one aspect," etc., mean that a particular 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 in various embodiments or aspects.

[0084] 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 from this application shall take precedence over the conflicting terminology from the incorporated references. While specific aspects have been described, alternatives, modifications, variations, improvements, and substantial equivalents may be conceived by the applicant or others skilled in the art that are not currently foreseeable or may not be foreseeable. Therefore, the appended claims, both submitted and possibly amended, are intended to cover all such alternatives, modifications, variations, improvements, and substantial equivalents.

[0085] To avoid ambiguity, the word "including" is intended to mean "contains," but not necessarily "composes of" or "consisting of." In other words, the steps, options, or alternatives listed do not need to be exhaustive.

[0086] The disclosure of the invention as found herein is intended to cover all aspects found in claims that are multiple dependent on each other, regardless of the fact that claims may be found without multiple dependencies or redundancy. Unless otherwise stated, numerical ranges expressed in the form of “x to y” should be understood to include both x and y. In 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 foregoing sections, with necessary modifications, are suitably applied to the other sections. Thus, features 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.

[0087] The following examples are merely illustrative of the cleaning strip compositions disclosed herein and are not intended to limit the scope of the invention.

[0088] Example The following examples are merely illustrative of the cleaning strip compositions disclosed herein and are not intended to limit the scope of the invention.

[0089] In the following embodiments, the strips are prepared according to the following method: Fat / oil is added to a mixer. The mixer is heated to a temperature of 85 to 90°C. Caustic soda is slowly added to completely convert the raw materials into a soap mixture. After the caustic soda has been completely added, the soap mixture is mixed for approximately 10 minutes to produce a final mixture. The final mixture is then cooled, rolled into a sheet, and extruded to form an extrudate. The extrudate is stamped into cleaning strips.

[0090] As described in the test protocol, various properties of the cleaning strips were tested, including foaming, grittiness, cracking, stiffness, and pH. Strip moisture content was measured by Karl Fischer titration. Table 1 lists the cleaning strip compositions of Examples 1 through 3. All quantities are listed as a percentage by weight of the cleaning strip composition. POLYOX™ refers to water-soluble polyethylene glycol (PEG-45M), commercially available from Dow Chemical. Acceptable strips have a stiffness value greater than or equal to 2.0 kg and a foaming value of at least 3.

[0091] Evaluation plan Hardness testing scheme principle A 30° conical probe penetrates a soap / synthetic detergent sample to a predetermined depth at a specified speed. The resistance generated at that specific depth is recorded. This figure can be correlated with the yield stress.

[0092] Hardness (or yield stress) can be measured using a variety of different permeameter methods.

[0093] Equipment and supplies TA-XT Express (Stable Micro Systems) 30° Conical Probe - Component # P / 30c (Stable Micro Systems) Sampling technology This test can be applied to soap / synthetic detergent (strips, granules, or small pieces) from blanks, finished strips, or small pieces from a pressing machine. In the case of blanks, small pieces of a suitable size (9 cm) for the TA-XT can be cut from a larger sample. If the granules or small pieces are too small to be installed in the TA-XT, a compression clamp is used to form several strips into a single soft ingot large enough for testing.

[0094] program Set up TA-XT Express These settings only need to be inserted into the system once. They are all saved and loaded whenever the instrument is turned on again.

[0095] Set test methods Click the menu Select test settings (press 1) Select the TPE to test (press 1) Select option 1 (Loop Test) and press OK. Click the menu Select test settings (press 1) Select parameters (press 2) Select the pre-test speed (press 1) Type 2 (mm s) -1 Press OK. Select trigger force (press 2) Type 5 (g) and press OK. Select the test speed (press 3). Type 1 (mm s) -1 Press OK. Select the return speed (press 4) Type 10 (mm s) -1 Press OK. Select distance (press 5) For soap blanks, type 15 (mm), or for soap sticks, type 3 (mm), and press OK.

[0096] Select time (press 6) Type 1 (cycle) calibration Screw the probe onto the probe carrier.

[0097] Click the menu Select an option (press 3) Select calibration force (press 1) - The instrument requires the user to check that the calibration platform is empty. Press OK to continue and wait until the instrument is ready.

[0098] Place the 2 kg calibration weight on the calibration platform and press OK. Wait until the message "Calibration complete" is displayed and the weights are removed from the platform.

[0099] Sample measurement The blank is placed on the test platform.

[0100] Press the up or down arrow to bring the probe close to the surface of the billet (without touching it).

[0101] Run Obtain the reading (g or kg) at the target distance (Fin).

[0102] After execution, the probe returns to its original position.

[0103] Remove the sample from the platform and record its temperature.

[0104] Calculation and representation of results Output The output of this test is expressed in g or kg as "force" (R0). T The TA-XT readings were combined with sample temperature measurements.

[0105] Temperature correction The hardness (yield stress) of skin cleansing strip formulations is temperature-sensitive. For meaningful comparisons, the readings at the target distance (R) should be calculated according to the following equation. T Correct to the standard reference temperature (40℃ under normal circumstances): Where R 40 =Reading at reference temperature (40℃) R T =Reading at temperature T α = Temperature correction factor T = The temperature at which the sample is analyzed.

[0106] Correction can be applied to tensile stress.

[0107] Raw data and processed data The end result is the force or stress corrected for temperature, but it is recommended to also record the instrument readings and sample temperature.

[0108] Foaming test The cleaning strips were evaluated by trained assessors at a constant temperature under specified water hardness conditions.

[0109] The test equipment and conditions are as follows: - Control the water flow rate: 2.5 L / min or bowl -10-liter bowl, filled with water at 30°C (the hardness of the local country). - Set the metronome and stopwatch to 160 / 0 -thermometer - Gravelliness and sandy texture models - Definitions used to help evaluate the comparison and scoring of samples.

[0110] -Assessment conducted by trained operators without gloves. Foaming assessment procedure: i. Pretreatment: Before starting the evaluation, wet the strip under running water and twist it 20 times between your hands at 180° to remove the dry surface layer. Then place the strip back on the tray.

[0111] ii. Remove the strip, immerse it in the bowl, and rotate it 12 times in the water at the pace of a metronome within 5 seconds on a timer.

[0112] iii. Place the strip on the tray.

[0113] iv. Sweep your left hand back once with your right hand to collect the foam produced by both hands.

[0114] v. To twist one's hand three times.

[0115] vi. Analyze the amount of foam.

[0116] The following scale measures the properties of foam quantity.

[0117] "Good" and "excellent" foam volume are considered good foaming performance, with a rating of 4 being considered acceptable to consumers and representative of sales performance. Ratings of 3 and 5 are respectively considered significantly less or more acceptable to consumers.

[0118] Comparative samples 1 to 4 (C1-C4) and samples 1 to 6 were prepared using the methods previously disclosed in the Examples section of this document. Iodine value (IV) is a measure of the relative unsaturation in an oil component, determined by the absorption of halogens. Since melting point and oxidative stability are related to unsaturation, the IV value provides an estimate of these factors. A higher iodine value indicates a higher degree of unsaturation and greater oxidative sensitivity.

[0119] Table 1. Fat fillings of bars produced during the pre-saponification oil blending process.

[0120] 1 Palm oil 2 Palm stearin oil 3 Palm kernel oil 4 Refined bleached and deodorized soybean oil 5 A mixture of stearic acid and palmitic acid fatty acids in a 1:1 ratio 6 Hydrogenated soybean oil Comparative sample 5 (C5) was prepared using the same method as C1 to C3. Samples 7 to 9 were prepared by splitting the soap into two streams: a first stream containing a high C18:3 soap stream; and a second stream containing no short-chain palmitate. The individual soap streams were processed under the aforementioned conditions. The two streams were very coarsely combined by Sigma mixing at 40°C for 2 to 3 minutes, followed by the addition of trace ingredients such as fragrance, and then mixing for another 5 minutes. The mixture was then cold-rolled into sheets, extruded, and stamped, similar to the cleaning strip process previously described in the Examples section.

[0121] Table 2. Fat fillings of bars produced during the process where the oil was not blended before saponification.

[0122] 1 Palm oil 2 Palm stearin oil 3 A mixture of stearic acid and palmitic acid fatty acids in an approximately 1:1 ratio. Sample 7 has the same composition as C5 prepared by conventional methods, wherein all oils are blended prior to saponification. However, Sample 7 exhibits higher hardness and more foaming, as shown in Table 2. Without being bound by theory, it is believed that the higher hardness and greater foaming in Sample 7 compared to C5 can be attributed to the C18:3 soap being in a separate domain, rather than being blended with other soaps at the molecular level, thus making it easier to obtain during foaming and not softening the composition by blending with C18:2 / C18:1 soaps.

[0123] Table 3. Chain composition of strips produced in the method of blending oils before saponification.

[0124] Table 4. Chain composition of strips produced in methods where the oil is not blended before saponification.

[0125] Comparative Sample 1 (C1) is a strip with a composition similar to commercially available strips. C1 produces very good foaming and also has a stiffness that allows for high-speed extrusion and stamping. This strip is made from a blend of oils commonly used in strip preparation: long-chain oils—palm oil and palm stearin oil—and short-chain oil—palm kernel oil (see Tables 1 and 3). Comparative Sample 2 (C2) is a strip made using only palm oil and palm stearin oil without short chains. It produces very poor foaming. Comparative Sample 3 (C3) is made from a blend of soybean oil, hydrogenated soybean oil, and palm oil. It does not have short chains, but because the C18:2 / C18:1 ratio is greater than 0.7, and the total content of C18:2 plus C18:1 is about 25% of the soap, the strip produces very good foaming. C3 was prepared according to International Application No. WO 2021 / 164994. Strips from C1 to C3 contain very small amounts of C18:3 chains—less than 2%. Sample 1 was a strip made from a blend of hydrogenated soybean oil and flaxseed oil in a ratio of 88:12. This strip exhibited good foaming properties, comparable to C1, and acceptable hardness for high-speed extrusion and stamping. The strip contained 7.1% C18:3 soap, which provided foaming and acceptable rheological properties for extrusion and stamping. Sample 2 had slightly less C18:3 soap—6.1%—but still provided good foaming and the desired rheological properties for extrusion and stamping. To illustrate the minimum acceptable range of C18:3 soap, Sample 6 was prepared from a blend of hydrogenated soybean oil and flaxseed oil in a ratio of 94:6. This composition contained 3.64% C18:3 soap, and it provided some foaming.

[0126] Sample 3 illustrates the upper limit range of C18:3 soap in the cleaning strip compositions disclosed herein. Sample 3 was made from a blend of ASAD and linseed oil in a ratio of 75:25. Comparative Sample 4 was made from a blend of ASAD and linseed oil in a ratio of 50:50. In these embodiments, ASAD could be replaced with fully hydrogenated palm oil. Sample 3 contained 15.1% C18:3 soap. Sample 3 had acceptable hardness and produced foam similar in volume to Samples 1 and 2, as well as C1. The hardness (below 2.0) in C4 was unacceptable.

[0127] Samples 4 and 5 illustrate the effect of the C16 / C18 ratio in long-saturated chain soaps on the hardness and foaming properties of flaxseed oil bars. Sample 4 was made from a blend of ASAD (or hydrogenated palm oil) and flaxseed oil in a ratio of 86:14. Sample 5 was made from a blend of hydrogenated soybean oil and flaxseed oil in the same ratio of 86:14. The difference between Samples 4 and 5 lies in the composition of long-saturated chain C16 and C18. Compared to Sample 5, which has a C16 / C18 ratio of approximately 1:7, Sample 4, with a C16 / C18 ratio closer to 1:1, exhibits higher hardness and lower foaming properties.

[0128] Comparative Example 5 (C5) illustrates the case where a blend of linseed oil and other long-chain oils contains a high fraction (60% by weight) of conventional (non-hydrogenated) oils (such as palm oil and palm stearin). In this case, the composition becomes unacceptably soft for extrusion and stamping due to the high level of oleic and linoleic acid chains (25.8% by weight). Furthermore, it produces very poor foaming because the C18:2 / C18:1 ratio is less than 0.7.

[0129] Surprisingly, when a similar composition with the same chain distribution was prepared by combining two separate soap streams (one being 75 / 25 ASAD / linseed oil (similar to Sample 3) and the other being 25 / 75 palm oil / palm stearin (similar to C2)), the resulting strip in Sample 7 (containing streams C2 and Sample 3 in a 60:40 ratio) exhibited greater hardness and produced good foaming. Sample 8 was prepared similarly by combining two soap streams: another high-linseed oil stream—50 / 50 ASAD / linseed oil (similar to C4)—and a long-chain soap, 25 / 75 palm oil / palm stearin (similar to C2). Sample 7 contained streams C2 and C4 in an 80:20 ratio. Despite a total oil content of 80% and a C18:2 / C18:1 ratio of 0.24, this composition produced good foaming and had the desired hardness for extrusion and stamping. Sample 9 illustrates a lower range of desired foaming C18:3 soaps when prepared according to the novel method described herein. Sample 9 was prepared by combining a soap stream corresponding to C2 with Sample 3 at a ratio of 76:24, such that the fraction of C18:3 soap in the final composition is 3.8%. Sample 9 has an acceptable hardness for extrusion and stamping.

[0130] Tables 5 and 6 show further details of the strips prepared in the embodiments described herein.

[0131] Table 5. Strip composition of strips prepared in the method of blending oils before saponification.

[0132] Table 6. Strip composition of strips prepared in the method in which the oil is not blended before saponification.

Claims

1. A cleaning strip composition comprising: Based on the total weight of the cleaning strip composition, 3 to 20% by weight of C18:3 soap, preferably 6 to 15% by weight of C18:3 soap, more preferably 10 to 15% by weight of C18:3 soap, wherein the cleaning strip composition comprises less than 0.5% by weight of C8 to C14 soap based on the total weight of the cleaning strip composition.

2. The cleaning strip composition of claim 1, wherein, based on the total weight of the cleaning strip composition, the cleaning strip composition comprises 0.0001 to 0.5% by weight of C8 to C14 soap.

3. The cleaning strip composition of claim 1 or claim 2, comprising 0.005 to 0.5% by weight of C8 to C14 soap based on the total weight of the cleaning strip composition.

4. The cleaning strip composition as described in any of the preceding claims further comprises saturated long-chain soap, unsaturated long-chain soap, or a combination thereof.

5. The cleaning strip composition as claimed in any of the preceding claims, wherein the saturated long-chain soap comprises C16 soap, C18 soap, or a combination thereof.

6. The cleaning strip composition as claimed in any of the preceding claims, wherein the unsaturated long-chain soap comprises C18:1 soap, C18:2 soap, or a combination thereof.

7. The cleaning strip composition as claimed in any of the preceding claims, wherein the cleaning strip composition is extrudable.

8. A strip comprising a cleaning strip composition as described in any of the preceding claims.

9. A method for preparing a cleaning strip composition, wherein in the cleaning strip composition: (a) The total weight percentage of C18:1 and C18:2 present in the cleaning strip composition is greater than the total weight percentage of C18:3 present in the strip; and (b) The ratio of (C18:3+C18:2) / C18:1 is less than 0.7; The method includes: Neutralize the first fatty blend containing 15% or more of C18:3 chains to produce the first long-chain soap; The middle and second streams contain a second fatty acid blend of saturated long-chain soaps, unsaturated long-chain soaps, or combinations thereof to produce a second long-chain soap; and The first long-chain soap and the second long-chain soap are combined and mixed to produce a cleaning strip composition.

10. The method of claim 9, wherein the saturated long-chain soap comprises C16 soap, C18 soap, or a combination thereof, and wherein the unsaturated long-chain soap comprises C18:1 soap, C18:2 soap, or a combination thereof.

11. The method of any one of claims 9 or 10, wherein the first fatty acid blend comprises 50% or more of C16 and C18 soaps.

12. The method of any one of claims 9 to 11, wherein the second fatty blend comprises 0 to 50% by weight palm oil and 50 to 100% by weight palm stearin oil.

13. A strip prepared by the method of any one of claims 9-12, wherein the strip comprises less than 0.5% by weight of C8 to C14 soap based on the total weight of the cleaning strip composition, preferably from 0.0001 to 0.5% by weight based on the total weight of the cleaning strip composition.

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