Transparent liquid personal cleansing composition

Abstract

The present invention provides a transparent liquid personal care composition comprising 5 to 30% by weight of soap; 0.5 to 10% by weight of a non-soap surfactant; 1 to 20% by weight of a polyol comprising a polyhydroxy diol; 60 to 90% by weight of water; and wherein the free fatty acid content is less than 0.1% by weight; and wherein the composition comprises soap of long-chain fatty acids (C14 to C30) and soap of short-chain fatty acids (C8 to C12) in a weight ratio of 1:1.5 to 1:10.

Description

Technical Field

[0001] This invention relates to aqueous skin cleansing compositions suitable for topical application for cleaning human bodies (such as skin and hair). In particular, it relates to transparent liquid compositions that maintain their transparency at low temperatures. Background Technology

[0002] Liquid soap compositions, especially transparent soaps, are aesthetically appealing. These are typically used for specialized applications such as hand and face washing, and are particularly preferred for outdoor applications, such as during travel, in hotels and restaurants where hygiene is highly valued and there is a possibility of contamination in washing areas due to the large number of people using soap.

[0003] Liquid soaps are typically alkali metal salts of saturated fatty acids. Among alkali metals, potassium is preferred over sodium because potassium soaps are more soluble in water, thus maintaining a liquid state in formulations. However, potassium salts are more expensive. Non-soap detergents (NSDs) are also incorporated into such compositions, which improve their solubility in water. The clear and transparent appearance of personal care products is advantageous in the market because it can be attributed to purity, gentleness, cleanliness, freshness, or lightness by consumers. Another benefit of combining a clear appearance with transparent packaging is that consumers can easily view and inspect the product.

[0004] US4310432 (Lever Brothers Company, 1982) claims protection for an aqueous liquid soap solution containing 20% ​​to 45% by weight of sodium soap, said sodium soap being substantially composed of a mixture of: (A) at least one sodium soap of a C8 to C14 saturated fatty acid, and (B) at least one sodium soap of a fatty acid selected from the group consisting substantially of monounsaturated and diunsaturated fatty acids of C16 to C22, and mixtures thereof.

[0005] Cleaning products based on synthetic surfactants can provide a clear appearance, but are known to have relatively weaker cleaning power and coarser foaming compared to soap-based products. While the inclusion of soap in cleaning products can improve cleaning performance and / or foaming properties to provide the rich and creamy foam of synthetic surfactant-based cleaning products, such soap inclusion often results in a translucent or opaque appearance. The inclusion of soap also leads to another problem: the composition becomes cloudy at low temperatures. It can be seen that in cold climates and winter, such compositions no longer remain transparent, and their appearance tends to change with temperature.

[0006] Therefore, there is a need for a cleaning product that is transparent and does not affect the richness and creaminess of the foam, and that remains transparent regardless of changes in location, weather, and temperature. No existing technology offers all the advantages and benefits of this invention. Summary of the Invention

[0007] According to a first aspect, the present invention discloses a transparent liquid personal care composition comprising: a. 5 to 30 percent by weight of soap; b. 0.5 to 10% by weight of non-soap surfactants; c. 1 to 20% by weight of polyols containing polyhydric glycol; d. 60 to 90% by weight of water; and The free fatty acid content is less than 0.1% by weight; and the soap contains long-chain fatty acids (C14 to C30) and short-chain fatty acids (C8 to C12) in a weight ratio of 1:1.5 to 1:10.

[0008] A second aspect of the present invention provides a method for preparing a transparent liquid personal care composition according to the first aspect, the method comprising the following steps: a. Dispersing the thickening polymer in water to obtain an aqueous mixture. b. Add fatty acids to an aqueous mixture and neutralize with an alkali to obtain liquid soap; c. Add the non-soap surfactant to the liquid soap from step “b”.

[0009] In step "a" or step "b", a chelating agent and a polyol are added.

[0010] A third aspect of the invention provides the use of the personal care composition according to the first aspect in the manufacture of a transparent personal care composition.

[0011] A fourth aspect of the invention provides the use of a polyol comprising propylene glycol in the manufacture of a transparent cleaning composition, said transparent cleaning composition being transparent at a temperature of up to 4°C.

[0012] Another aspect of the invention provides packaged personal care / personal washing products comprising: containers or bottles including labels or advertisements intended for sale or distribution to consumers; and soap compositions according to the first aspect of the invention.

[0013] These and other aspects, features, and advantages will become apparent to those skilled in the art from the following detailed description and appended claims. For the avoidance of doubt, any feature of one aspect of the invention may be used in any other aspect of the invention.

[0014] The term "comprising" does not imply limitation to any element subsequently stated, but rather includes unspecified elements of primary or secondary functional importance. In other words, the listed steps, elements, or options need not be exhaustive. Whenever the terms "comprising" or "having" are used, these terms mean equivalent to "comprising" as defined above. In other words, the listed steps or options need not be exhaustive. It should be noted that the examples given in the following description are intended to illustrate the invention and not to limit the invention to those examples alone. Similarly, unless otherwise stated, all percentages are by weight / weight percentage.

[0015] Except as expressly stated in the operational and comparative examples or elsewhere, all figures in this specification and claims indicating the amount or reaction conditions of the material, the physical properties of the material, and / or its use should be understood to be modified by the word “about”.

[0016] Numerical ranges expressed in the format "x to y" are understood to include both x and y. When describing multiple preferred ranges for a particular feature in the format "x to y", it is understood that combinations of all ranges with different endpoints can also be considered.

[0017] It should be noted that when specifying any concentration or amount range, any particular upper limit concentration can be associated with any particular lower limit concentration or amount.

[0018] To gain a more complete understanding of the above and other features and advantages of the present invention, reference should be made to the following detailed description of preferred embodiments. Detailed Implementation

[0019] This invention relates to aqueous skin cleansing compositions suitable for topical application to clean the human body (such as skin and hair). In particular, it relates to transparent liquid compositions that maintain their transparency at low temperatures.

[0020] The present invention provides a transparent liquid personal care composition comprising: 5 to 30 wt% soap; 0.5 to 10 wt% non-soap surfactant; 1 to 20 wt% polyol comprising a polyhydroxy diol; 60 to 90 wt% water; and wherein the free fatty acid content is less than 0.1 wt%; and wherein the soap comprises soap of long-chain fatty acids (C14 to C30) and soap of short-chain fatty acids (C8 to C12) in a weight ratio of 1:1.5 to 1:10.

[0021] The inventors of this invention faced the problem of maintaining the transparency of a clear liquid soap composition at low temperatures, especially when sold in colder regions of the world due to seasonal changes. Polyols had been considered for transparency in the past, but simply containing polyols did not guarantee transparency at low temperatures. Furthermore, soap compositions were particularly difficult to make transparent. Increasing the polyol content did not help solve the transparency problem and might be unacceptable to consumers for sensory reasons. In addition, the inventors faced the challenge of preparing an economical composition. They investigated many different formulations and found propylene glycol to be useful, but higher levels of polypropylene glycol significantly increased costs. Therefore, the problem to be solved multiplied: to prepare a clear, economical soap-based cleaning composition that remained transparent even at low temperatures. Surprisingly, it was discovered that, in this invention, when the composition was formulated with the key ratios and component proportions according to the first aspect of the invention, the inventors were able to obtain compositions within a range of component ranges, such that the liquid transparent composition was transparent at a low temperature of 4°C while maintaining a low propylene glycol level.

[0022] Transparent liquid personal care composition The present invention provides a transparent liquid personal care composition comprising: 5 to 30 wt% soap; 0.5 to 10 wt% non-soap surfactant; 1 to 20 wt% polyol comprising a polyhydroxy diol; 60 to 90 wt% water; and wherein the free fatty acid content is less than 0.1 wt%; and wherein the soap comprises soap of long-chain fatty acids (C14 to C30) and soap of short-chain fatty acids (C8 to C12) in a weight ratio of 1:1.5 to 1:10.

[0023] The compositions of the present invention are substantially transparent. The transparency of the liquid composition can be characterized by transmittance measurements.

[0024] soap The cleaning composition comprises about 5 to 30% by weight of soap, more preferably 7 to 25% by weight, and most preferably about 10 to 23% by weight of soap, based on the weight of the cleaning composition; wherein at least 95% by weight of fatty acid soaps of the total soap are neutralized. Preferably, the cleaning composition comprises 0.1 to 27% by weight of total fatty substances (TFM).

[0025] The term soap refers to a salt of fatty acids, wherein the accompanying cation can be an alkali metal, alkaline earth metal, or ammonium ion, preferably an alkali metal. Preferably, the cation is sodium or potassium. Soap can be saturated or unsaturated, depending on the nature of the corresponding fatty acid and / or oil used for saponification.

[0026] Preferably, the cleaning composition comprises 0.1 to 8% by weight, more preferably 2 to 7% by weight, and most preferably about 3 to 6% by weight of a salt of long-chain (C14 to C30) fatty acids based on the weight of the cleaning composition.

[0027] Preferred soaps contain 10 to 50% by weight of the total soap weight, more preferably 20 to 40% by weight, and most preferably about 25 to 35% by weight of long-chain (C14 to C30) fatty acids.

[0028] Preferred soaps contain 50 to 90% by weight, more preferably 60 to 80% by weight, and most preferably about 65 to 75% by weight of short-chain (C8 to C12) fatty acids based on the total weight of the soap.

[0029] Preferably, the cleaning composition comprises 6 to 16% by weight, more preferably 8 to 14% by weight, and most preferably about 9 to 12% by weight of a salt of a short (C8 to C12) chain fatty acid, based on the weight of the cleaning composition.

[0030] The preferred length is (C) 14 To C 30 The weight ratio of salts of 5-chain fatty acids to salts of short-chain (C8 to C12) fatty acids is in the range of 1:1.5 to 1:10; more preferably 1:2 to 1:8 and most preferably 1:2.1 to 1:6.

[0031] polyols The compositions of the present invention comprise a polyol ranging from 1 to 20% by weight, more preferably from 2 to 18% by weight, and most preferably from 3 to 15% by weight. Most preferably, the polyol comprises a polyhydroxy glycol. Preferably, the polyhydroxy glycol is present in the range of 0.5 to 10% by weight, more preferably from 1 to 10% by weight, and most preferably from 2 to 10% by weight. Preferably, the polyhydroxy glycol is selected from C3 to C6 hydroxy glycols and mixtures thereof.

[0032] Typical polyhydroxy alcohols include polyalkylene glycols, and more preferably alkylene polyols and their derivatives. Examples include propylene glycol, dipropylene glycol, polypropylene glycol, glycerol, polyethylene glycol, sorbitol, hydroxypropyl sorbitol, hexanediol, 1,3-butanediol, 1,2,6-hexanetriol, ethoxylated glycerol, propoxylated glycerol, and mixtures thereof.

[0033] Highly preferred is that the composition of the present invention comprises a mixture of glycerol and other polyhydroxy alcohols, and more preferably, the composition of the present invention comprises a mixture of glycerol and propylene glycol.

[0034] Preferably, the present invention comprises glycerol in the range of 1 to 10% by weight, more preferably 2 to 9% by weight, and most preferably 2.5 to 8.5% by weight, based on the weight of the composition cleaning composition.

[0035] Preferably, the present invention comprises propylene glycol in the range of 0.5 to 10% by weight, more preferably 1 to 9% by weight, and most preferably 1.5 to 8.5% by weight, based on the weight of the cleaning composition.

[0036] Further preferred is that the weight ratio of soap to polyol in the cleaning composition ranges from 1.1:1 to 3:1, more preferably from 1.5:1 to 2.3:1, and most preferably from 1.64:1 to 2.2:1.

[0037] Non-soap surfactants Preferably, the cleaning composition comprises 0.5 to 10% by weight, more preferably 1 to 8% by weight, even more preferably 2 to 7% by weight, and most preferably 2 to 6% by weight, of a non-soap surfactant based on the weight of the cleaning composition. The compositions of the present invention may contain anionic surfactants, nonionic surfactants, cationic surfactants, or amphoteric surfactants.

[0038] The synthetic anionic detergent active material that can be used in this invention can be an aliphatic sulfonate, such as a primary alkane (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. The anion can also be an alkyl sulfate (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: RO(CH2CH2O) n SO3M Wherein R is an alkyl or alkenyl group having 8 to 18 carbons, preferably 12 to 18 carbons, and n has an average value greater than 1.0, preferably greater than 3; and M is a solubilizing cation, such as sodium, potassium, ammonium, or substituted ammonium. Ammonium dodecyl ether sulfate and sodium dodecyl ether sulfate are preferred.

[0039] Anionic surfactants can also be alkyl sulfonyl succinates (including mono- and di-alkyl, e.g., C6-C). 22 sulfosuccinates); alkyl and acyl taurates, alkyl and acyl sarcosinates, sulfoacetates, C8-C 22 Alkyl phosphates and phosphates, alkyl phosphate esters and alkoxyalkyl phosphate esters, acyl lactates, C8-C 22 Monoalkyl succinates and maleates, sulfoacetates, alkyl glucosides and acyl hydroxyethyl sulfonates, etc.

[0040] Sulfosuccinates can be monoalkyl sulfosuccinates having the following formula: R 4 O2CCH2CH(SO3M)CO2M; and The following formula is amide-MEA sulfosuccinate: R 4 CONHCH2CH2O2CCH2CH(SO3M)CO2M Where R 4 The range is C8-C 22 Alkyl group and M is a solubilizing cation.

[0041] Creatine salts are usually represented by the following formula: R 1 CON(CH3)CH2CO2M, Where R 1 The range is C8-C 20 Alkyl group and M is a solubilizing cation.

[0042] Taurine salts are usually represented by the following formula: R 2 CONR 3 CH2CH2SO3M Where R 2 The range is C8-C 20 Alkyl, R 3 The range is C1-C4 alkyl and M is a solubilizing cation.

[0043] The cleaning composition of the present invention 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 carboxylic acids having 6 to 18 carbon atoms and an iodine value less than 20. At least 75% of the mixed carboxylic acids have 12 to 18 carbon atoms and up to 25% have 6 to 10 carbon atoms.

[0044] 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: RC-(O)OC(X)HC(Y)H2-(OCH-CH2) m -SO3M + , Where R is an alkyl group having 8 to 18 carbons, m is an integer from 1 to 4, X and Y are hydrogen or alkyl groups having 1 to 4 carbons, and M +It is a monovalent cation, such as sodium, potassium, or ammonium.

[0045] The most preferred anionic surfactant used in the compositions of the present invention is selected from sulfonic acids, their salts, alkyl ether sulfates, mixtures and combinations thereof. The most preferred anionic surfactant may include sodium dodecyl ether sulfate, its derivatives, such as ethylene oxide derivatives, etc.

[0046] Preferably, the cleaning composition comprises an anionic surfactant in the range of 0.01 to 10% by weight, more preferably 0.1 to 8% by weight, even more preferably 1 to 7% by weight, and most preferably 2 to 6% by weight.

[0047] Preferably, the cationic surfactant used for the purposes of this invention is, for example, a quaternary ammonium surfactant, including but not limited to: benzalkonium chloride, alkyl betaine, alkylamidopropyl betaine, alkylamidopropyl hydroxysulfonyl betaine alkylamine, alkylimidazolium, and ethoxylated amine. Preferably, the cleaning composition contains a cationic surfactant in the range of 0.01 to 10% by weight, more preferably 0.1 to 8% by weight, further more preferably 1 to 7% by weight, and most preferably 2 to 6% by weight.

[0048] Preferably, the amphoteric surfactant used for the purposes of this invention is, for example, an acyl / dialkylethylenediamine, such as sodium acylamphoacetate, cocamidopropyl betaine (CAPB), disodium acylamphodipropionate, disodium alkylamphodiacetate, sodium acylamphohydroxypropyl sulfonate, disodium acylamphodiacetate and sodium acylamphodipropionate, or an N-alkyl amino acid, such as aminopropylalkylglutamine, alkylaminopropionate, sodium alkylimidazolium dipropionate and lauroylamphocarboxyglycinate. Preferably, the cleaning composition comprises 0.01 to 10% by weight, more preferably 0.1 to 8% by weight, even more preferably 1 to 7% by weight, and most preferably 2 to 6% by weight of the amphoteric surfactant.

[0049] Preferably, the composition comprises a combination of anionic synthetic surfactant and amphoteric surfactant (e.g., betaine), especially when the anionic surfactant accounts for 50% or more of such synthetic surfactant mixture.

[0050] One or more nonionic surfactants can be used as co-surfactants in the cleaning compositions of the present invention. The nonionic surfactants are preferably used at levels as low as 5%, 7.5%, or 10% by weight and as high as 20%, 25%, or 30% by weight. Nonionic surfactants that can be used particularly include compounds having hydrophobic groups and reactive hydrogen atoms (e.g., fatty alcohols, acids, amides, or alkylphenols) reacting with alkyl oxides (especially ethylene oxide alone) or with propylene oxide. Specific nonionic detergent compounds are alkyl (C6-C4) compounds. 22 ) Phenolic ethylene oxide condensates, aliphatic (C8-C) 18 The condensation products of primary or secondary straight-chain or branched alcohols with ethylene oxide, as well as products obtained by the condensation of ethylene oxide with the reaction products of propylene oxide and ethylenediamine. Other so-called nonionic detergent compounds include long-chain tertiary amine oxides, long-chain tertiary phosphine oxides, and dialkyl sulfoxides.

[0051] Preferred nonionic surfactants include alkyl polyglucosides and carboxylic acid / alcohol ethoxylates having the following structures. a) HOCH2(CH2) n (CH2CH2O) x H or b) HOOC (CH2) m (CH2CH2O) y H; Where m and n are independently <18; and x and y are independently >1; preferably m and n are independently 6 to 18; and x and y are independently 1 to 30; c) HOOC (CH2) i -CH=CH-(CH2) k (CH2CH2O) z H; Where i and k are independently 5 to 15; and z is independently 5 to 50; preferably i and k are independently 6 to 12; and z is independently 15 to 35.

[0052] 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; or may be one of the glycoamides described in this application by introduction.

[0053] Preferably, the nonionic surfactant used for the purposes of this invention is, for example, an alkanolamide such as cocoamide MEADEA / MIPA, an ester produced by esterification of carboxylic acids with ethylene oxide, glycerol, sorbitan anhydride or other alcohols and esters, such as ethoxylated alcohols, ethoxylated lanolin, ethoxylated polysiloxanes, propoxylated POE ethers, and alkyl glycosides such as lauryl glucoside, decyl glucoside, and cocoyl glucoside. Preferably, the cleaning composition contains 0.01 to 10% by weight, more preferably 0.1 to 8% by weight, further more preferably 1 to 7% by weight, and most preferably 2 to 6% by weight of a nonionic surfactant.

[0054] Suitable surfactants that can be used in the formulations disclosed herein may include one or more of sodium cocoyl hydroxyethyl sulfonate, sodium lauryl sulfate, disodium lauryl sulfosuccinate, lauryl glucoside, myristyl glucoside, decyl glucoside, sodium sulfate, sodium silicate, cocamidopropyl betaine, sodium cocoyl sulfate, and sodium dodecyl sulfate. In one embodiment, the surfactant may include sodium cocoyl hydroxyethyl sulfonate. In another embodiment, the surfactant may include disodium dodecyl sulfosuccinate. In a further embodiment, the surfactant may include a mixture of dodecyl glucoside, myristyl glucoside, sodium sulfate, sodium silicate, and sodium cocoyl sulfate. In yet another embodiment, the surfactant may include sodium lauryl sulfate. Suitable surfactants are not limited to those listed herein, but may include other surfactants that are in powder form and water-soluble prior to their incorporation into the formulation to maximize the cleaning potential of the formulation.

[0055] Co-surfactants For the purposes of this invention, alkoxylated nonionic surfactants (which are a class of nonionic surfactants) are specifically defined as co-surfactants. Moreover, only for the purposes of this invention, alkoxylated nonionic surfactants as co-surfactants are distinguished from other nonionic surfactants previously defined because alkoxylated nonionic surfactants as co-surfactants contain at least two or more alkyl epoxide groups. (Conversely, nonionic surfactants having fewer than two EO groups are considered to be the surfactants described in the preceding paragraphs). Examples of alkoxylated nonionic surfactants include, but are not limited to, condensation products of straight-chain or branched aliphatic alcohols, acids, phenols, esters, glycerides, amines, and amides. Preferred co-surfactants are ethoxylated nonionic surfactants having 2-12, most preferably 2-6 ethylene oxide (EO) groups. Particularly preferred nonionic surfactants are ethoxylated fatty amides having 2-12, most preferably 2-6 (EO) groups.

[0056] Preferably, the compositions of the present invention contain a co-surfactant in the range of 0 to 10% by weight, more preferably 2 to 8% by weight, and most preferably 3 to 7% by weight.

[0057] electrolytes The cleaning compositions of the present invention may contain electrolytes. Electrolytes used for the purposes of the present invention may include inorganic salts (e.g., sodium chloride, potassium chloride) and organic salts (e.g., sodium citrate). In addition to the chlorides and citrates described above, other salts include phosphates, sulfates, and other halide ion salts. The counterions of such salts may be sodium or other monovalent cations, as well as divalent and trivalent cations.

[0058] Preferably, the cleaning composition of the present invention is substantially free of electrolytes, more preferably "substantially free" of electrolytes, and most preferably "completely free" of electrolytes. The term "substantially free" means less than 1% by weight of electrolytes in the composition. Similarly, "substantially free" means less than 0.01% by weight of electrolytes, and "completely free" means less than 2.0 × 10⁻⁶ by weight of electrolytes in the cleaning composition of the present invention. -6 Electrolyte by weight%. Most preferably, the composition of the present invention contains less than 0.5% by weight of electrolyte.

[0059] Chelating agents The cleaning composition of the present invention contains a chelating agent. Preferably, the chelating agent in the cleaning composition is present in the range of 0.1 to 3% by weight of the cleaning composition, more preferably in the range of 0.2 to 2.5% by weight of the cleaning composition, and most preferably in the range of 0.2 to 1.5% by weight of the cleaning composition.

[0060] Preferably, the chelating agent in the cleaning composition is present at a weight of at least 0.1% by weight, more preferably at least 0.8% by weight, and most preferably at least 1% by weight.

[0061] Preferably, the chelating agent in the cleaning composition is present at a maximum of 3% by weight of the cleaning composition, more preferably at a maximum of 2.5% by weight, further preferably at least 2% by weight, and most preferably at a maximum of 1.5% by weight.

[0062] Preferred chelating agents are as follows (the abbreviations are in parentheses after the names): Ethylenediaminetetraacetic acid (EDTA), disodium ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid (DTPA), ethane-1-hydroxy-1,1-diphosphonic acid (EHDP), ethylenediamine-N,N′-disuccinic acid (EDDS), nitrotriacetic acid (NTA), sodium iminodisuccinate (IDS), ethylene glycol-bis-(2-aminoethyl)-N,N,N′,N′-tetraacetic acid (EGTA), methylglycine diacetic acid (MGDA), N-(2-hydroxyethyl)ethylenediamine-N,N′,N′-triacetic acid (HEDTA) Ethylenediaminetetramethylenephosphonic acid (EDTMP), diethylenetriaminepentamethylenephosphonic acid (DTPMP), glutamic acid-N,N-diacetic acid (GLDA), cyclohexane-1,2-diamine-N,N′,N′,N'-tetraacetic acid (CDTA), 1,3-propanediaminetetraacetic acid (PDTA), ethylenediaminetriacetic acid (EDTA), L-hydroxyiminodisuccinic acid (L-IDS), trisodium N-carboxyethyliminosuccinate (CEIS), citric acid, sodium tripolyphosphate (STP), and triethylenetetraaminehexaacetic acid (TTHA). Other preferred chelating agents are trisodium ethylenediaminedisuccinate, tetrasodium iminodisuccinate, tetrasodium glutamic acid-N,N-diacetic acid, sodium 2-hydroxyethyliminodisuccinate (disodium ethanol diglycine), tetrasodium 3-hydroxy-2,2-iminodisuccinate, trisodium methylglycine diacetate, and tetrasodium L-aspartic acid-N,N-diacetic acid. More preferred chelating agents are salts of ethylenediaminetetraacetic acid (EDTA) and diethylenetriaminepentaacetic acid (DTPA). Preferred EDTA salts are disodium ethylenediaminetetraacetic acid and tetrasodium ethylenediaminetetraacetic acid. Preferred DTPA salts are pentasodium diethylenetriaminepentaacetic acid.

[0063] Most preferably, the chelating agent suitable for the compositions of the present invention is selected from ethylenediaminetetraacetic acid (EDTA), or diethylenetriaminepentaacetic acid (DTPA), derivatives and combinations thereof, and mixtures thereof. EDTA derivatives are selected from tetrasodium EDTA, trisodium EDTA, disodium EDTA, and combinations thereof. DTPA derivatives are selected from tetrasodium DTPA, trisodium DTPA, disodium DTPA, and combinations thereof.

[0064] preservative The cleaning composition of the present invention contains a preservative. Preferably, the preservative in the cleaning composition is present in the range of 0.1 to 3% by weight of the cleaning composition, more preferably in the range of 0.1 to 2% by weight of the cleaning composition, and most preferably in the range of 0.1 to 1% by weight of the cleaning composition.

[0065] Examples of very useful preservatives suitable for the compositions of the present invention include, but are not limited to, chlorite components, sorbic acid components, and mixtures thereof.

[0066] Other preferred preservatives include, but are not limited to, those commonly used in cosmetics, such as dibromo-2-bromomethylglutaronitrile (2-bromo-2-bromomethylglutaronitrile), phenoxyethanol, 3-iodo-2-propynyl butylcarbamate, 2-bromo-2-nitro-propane-1,3-diol, imidazolidinyl hamstoff, 5-chloro-2-methyl-4-isothiazolin-3-one, 2-chloroacetamide, benzalkonium chloride, and benzyl alcohol.

[0067] According to the present invention, the preservative is particularly preferred from methylisothiazolinone, methylchloroisothiazolinone, 3-iodo-2-propynyl butylcarbamate (IPBC), DMDM ​​hydantoin and benzyl alcohol and / or mixtures or combinations thereof.

[0068] Free fatty acids Preferably, the cleaning composition of the present invention is substantially free of free fatty acids, more preferably "substantially free" of free fatty acids, and most preferably "completely free" of free fatty acids. The term "substantially free" means less than 1% by weight of free fatty acids in the composition. Similarly, "substantially free" means less than 0.01% by weight and "completely free" means less than 2.0 × 10⁻⁶ by weight in the cleaning composition of the present invention. -6 Free fatty acids, by weight %.

[0069] Preferably, the composition of the present invention has less than 1.0% by weight of the cleaning composition and more preferably less than 0.1% by weight of the cleaning composition of free fatty acids.

[0070] water The cleaning composition of the present invention comprises water in the range of 60 to 90% by weight, more preferably 65 to 85% by weight, and most preferably 68 to 80% by weight, based on the weight of the composition. The composition of the present invention is primarily an aqueous composition.

[0071] Thickening polymer The compositions of the present invention comprise water-soluble / water-dispersible polymers. These polymers may be cationic, anionic, amphoteric, or nonionic, having a molecular weight greater than 100,000 Daltons. They are known to improve the viscosity and stability of liquid detergent compositions, enhance the sensory feel on and off the skin during use, and enhance the creaminess and foam stability of foams. When present, the amount of polymer can range from 0.1 to 10% by weight of the composition. Preferably, the thickening polymer is present in the range of 0.01 to 2% by weight of the compositions of the present invention.

[0072] Examples of water-soluble / or water-dispersible polymers and rheology modifiers include gums such as cellulose gum, microcrystalline cellulose, cellulose gel, hydroxyethyl cellulose, hydroxypropyl cellulose, sodium carboxymethyl cellulose, methyl cellulose, ethyl cellulose, guar gum, gum arabic, gum arabic, gum acacia, agar gum, xanthan gum, and mixtures thereof; modified and unmodified starch granules and pregelatinized cold water-soluble starch; emulsion polymers such as Aculyn® 28; cationic polymers such as modified polysaccharides, including cationic guar gum such as Jaguar® C13S, Jaguar® C17, or Jaguar® C16; cationic modified cellulose such as UCARE® Polymer JR 30 or JR 40; and N-Hance® 3000, N-Hance® 3196, N-Hance® GPX 215, or N-Hance® GPX from Hercules. 196; Synthetic cationic polymers, such as Merquat® 100, Merquat® 280, Merquat® 281, and Merquat® 550 sold by Nalco; cationic starches, such as StaLok® 100, 200, 300, and 400 sold by Staley Inc.; cationic galactomannans, such as the Galactasol® 800 series from Henkel, Inc.; Quadrosoft® LM-200; and Polyquaternium-24®. High molecular weight polyethylene glycols, such as Polyox® WSR-205 (PEG 14M), Polyox® WSR-N-60K (PEG 45), and Polyox® WSR-301 (PEG 90M), are also suitable. Other cationic cellulose derivatives are cationic starch derivatives and cationic guar gum derivatives.

[0073] pH Preferably, the pH range of the composition of the present invention is 9.0 to 11, more preferably 9.5 to 11.

[0074] The pH of a solution can be expressed as the negative logarithm of hydrogen ion activity, which is related to the millivolt potential of the pH indicator electrode. This electrode is calibrated using a standard buffer mixture whose pH value falls on either side of the pH of the solution being measured (acidic or alkaline). Approximately 1 gram of the cleaning composition is weighed into a beaker, and brought to 100 grams by adding distilled water at 25°C, and the pH value is measured.

[0075] Moisturizer "Emollients" are defined as substances that soften or improve 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 by maintaining its softness by slowing down the decrease in its water content.

[0076] Moisturizers (which are also humectants, such as polyhydroxy alcohols, for example, glycerol and propylene glycol; and polyols, such as polyethylene glycol, such as Polyox WSR N-60K (PEG-45M)) are used in preferred embodiments of the invention. The moisturizer is preferably used in amounts of at least 0.5% by weight, 2.5% by weight, or 5% by weight, and at most 15% by weight, 20% by weight, or 25% by weight.

[0077] Hydrophobic emollients are used in preferred embodiments of the invention. Preferably, they are hydrophobic emollients having a weight-average particle size of less than 1000 or 500 micrometers in diameter, and are defined herein as “finely dispersed oils.” These emollients are preferably used in amounts of a minimum of 0.5 wt%, 2.5 wt%, or 5 wt%, and a maximum of 15 wt%, 20 wt%, or 25 wt%.

[0078] Suitable hydrophobic emollients include, but are not limited to, 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 (triglycerides), 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, 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 plant extracts; (e) Hydrocarbons, such as petrolatum, polybutene, liquid paraffin, microcrystalline wax, ceresin, squalene, pristan and mineral oil; (f) Higher alcohols, such as lauryl alcohol, cetyl alcohol, stearyl alcohol, oleyl alcohol, behenyl alcohol, cholesterol and 2-hexyldecyl alcohol; (g) 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 distearate, glyceryl tristearate, alkyl lactate, alkyl citrate, and alkyl tartrate; (h) 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, eugenol, citral, citronellol, borneol, linalool, geraniol, evening primrose, camphor, thymol, spirostol, pentene, limonene, and terpene oils; (i) A mixture of any of the above components, etc.

[0079] Beneficial agents In addition to the ingredients described above, preferred embodiments of the cleaning composition may also include other optional and preferred ingredients due to their known benefits. The type and amount depend largely on the nature and type of the cleaning composition and general pharmaceutical principles.

[0080] Other optional compositions may contain one or more 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 slowing the decrease in its water content. Suitable skin-beneficial agents include emollients, including, for example, hydrophobic emollients, hydrophilic emollients, or mixtures thereof. Water-soluble skin-beneficial agents may optionally be formulated into the liquid compositions of the present invention. Various water-soluble skin-beneficial agents may be used, and the level may be 0 to 50% by weight of the composition, but preferably 1 to 30% by weight. These materials include, but are not limited to, polyhydroxy alcohols. Preferred water-soluble skin-beneficial agents are glycerol, sorbitol, and polyethylene glycol.

[0081] Water-insoluble skin-beneficial agents can also be formulated into compositions as modifiers and moisturizers. Examples include silicone oils; hydrocarbons such as liquid paraffin, petrolatum, microcrystalline wax, and mineral oils; and vegetable triglycerides such as sunflower seed oil and cottonseed oil.

[0082] Preservatives may also be added to the composition to prevent the growth of potentially harmful microorganisms. Suitable conventional preservatives for use in the compositions of the present invention are alkyl esters of hydrobenzoic acid. Other preservatives that have recently come into use include caprolactone derivatives, propionates, and various quaternary ammonium compounds. Particularly preferred preservatives are phenoxyethanol, methylparaben, propylparaben, imidazolidinyl urea, sodium dehydroacetate, and benzyl alcohol. The selection of preservatives should take into account the intended use of the composition and any potential incompatibilities between the preservative and other components. Preservatives are preferably used in amounts ranging from 0.01% to 2% by weight of the composition.

[0083] A variety of other optional materials can be formulated into the composition. These may include: antimicrobial agents; exfoliating and scrubbing particles, such as polyethylene with silica or alumina; cooling agents, such as menthol; skin soothing agents, such as aloe vera; and colorants.

[0084] Shower gels or washes may contain particles with an average diameter of approximately 50 μm, which help remove dry skin. Without being bound by theory, the degree of exfoliation depends on the size and morphology of the particles. Large, coarse particles are often very harsh and irritating. Very small particles may not be effective exfoliants. Such exfoliants used in the art include natural minerals such as silica, talc, calcite, pumice, tricalcium phosphate; seeds such as rice, apricot kernels, etc.; ground shells such as almond and walnut shells; oats; polymers such as polyethylene glycol and polypropylene glycol beads; petals and leaves; microcrystalline wax beads; jojoba ester beads, etc. These exfoliants exhibit a wide variety of particle sizes and morphologies, ranging from micrometers to millimeters. They also have a range of hardness. Some examples are talc, calcite, pumice, walnut shells, dolomite, and polyethylene.

[0085] Advantageously, active agents other than skin conditioning agents as defined above may also be incorporated into the composition. These active ingredients may advantageously include antibacterial agents, vitamins, anti-acne active substances; anti-wrinkle, anti-skin aging and skin repair active substances; skin barrier repair active substances; non-steroidal cosmetic soothing active substances; artificial tanning agents and accelerators; skin brightening active substances; sunscreen active substances; sebum stimulants; sebum inhibitors; antioxidants; protease inhibitors; skin firming agents; antipruritic ingredients; hair growth inhibitors; 5-α reductase inhibitors; desquamating enzyme enhancers; anti-glycation agents; or mixtures thereof; etc.

[0086] These active agents may be selected from water-soluble active agents, oil-soluble active agents, pharmaceutically acceptable salts, and mixtures thereof. As used herein, the term "active agent" means a personal care active substance that may be used to deliver benefits to the skin and / or hair, and is generally not used to provide skin conditioning benefits delivered via emollients as defined above. As used herein, the term "safe and effective amount" means an amount of active agent that is high enough to alter the condition being treated or to deliver the desired skin care benefit, but low enough to avoid serious side effects. As used herein, the term "benefit" means a therapeutic, preventative, and / or long-term benefit associated with the treatment of a particular condition using one or more of the active agents described herein. The safe and effective amount of an active agent will vary depending on the specific active agent, the ability of the active substance to penetrate the skin, the user's age, health condition, and skin condition, and other similar factors.

[0087] A wide variety of active ingredients can be used in the compositions of the present invention, including those selected from anti-acne active substances, anti-wrinkle and anti-skin aging active substances, skin barrier repair aids, cosmetic soothing aids, local anesthetics, artificial tanning agents and accelerators, skin brightening active substances, antimicrobial and antifungal active substances, sunscreen active substances, sebum stimulants, sebum inhibitors, anti-glycation active substances, and mixtures thereof.

[0088] Anti-acne active ingredients can effectively treat acne vulgaris, a chronic condition of the sebaceous glands and hair follicles. Non-limiting examples of useful anti-acne active substances include keratolytic agents such as salicylic acid (o-hydroxybenzoic acid), derivatives of salicylic acid such as 5-octanoyl salicylic acid and 4-methoxysalicylic acid, and resorcinol; retinoids such as retinoic acid and its derivatives (e.g., cis and trans); sulfur-containing D and L amino acids and their derivatives and salts, especially their N-acetyl derivatives, mixtures thereof, etc.

[0089] Skin barrier repair active substances are skin care active ingredients that help repair and replenish the natural moisture barrier function of the epidermis. Non-limiting examples of skin barrier repair active substances include lipids such as cholesterol, ceramides, sucrose esters and pseudoceramides, as described in European Patent Specification No. 556957; ascorbic acid; biotin; biotin esters; phospholipids, mixtures thereof, etc.

[0090] Artificial tanning agents can help mimic natural tanning by increasing melanin in the skin or by creating the appearance of increased melanin production. Non-limiting examples of artificial tanning agents and accelerators include dihydroxyacetone; tyrosine; tyrosine esters such as ethyl tyrosine ester and glucosyl tyrosine ester; mixtures thereof, etc.

[0091] Skin-brightening active ingredients can actually reduce the amount of melanin in the skin, or provide this effect through other mechanisms. Non-limiting examples of skin-brightening active ingredients used in this article include aloe vera extract, α-glycero-L-ascorbic acid, aminotyrosine, ammonium lactate, glycolic acid, hydroquinone, 4-hydroxyanisole, mixtures thereof, etc.

[0092] Sunscreen active ingredients are also useful. Non-limiting examples of sunscreen agents useful in the compositions of the present invention are those selected from octyl methoxycinnamate (Parsol MCX) and butyl methoxybenzoylmethane (Parsol 1789), 2-ethylhexyl p-methoxycinnamate, 2-ethylhexyl N,N-dimethyl-p-aminobenzoate, p-aminobenzoic acid, 2-phenylbenzimidazole-5-sulfonic acid, oxybenzone, mixtures thereof, etc.

[0093] Protease inhibitors are also useful. Protease inhibitors can be divided into two main categories: proteases and peptidases. Proteases act on specific internal peptide bonds of proteins, while peptidases act on peptide bonds adjacent to the free amino or carboxyl groups at the ends of proteins and thus cleave proteins from the outside. Protease inhibitors suitable for the personal toilet strip compositions of the present invention include, but are not limited to, proteases such as serine proteases, metalloproteinases, cysteine ​​proteases, and aspartic proteases, and peptidases such as carboxypeptidases, dipeptidases, and aminopeptidases, and mixtures thereof.

[0094] Other useful active ingredients are skin tightening agents. Non-limiting examples of skin tightening agents that can be used in the compositions of the present invention include monomers that can bind polymers to the skin, such as (meth)acrylic acid and hydrophobic monomers consisting of long-chain alkyl (meth)acrylates, mixtures thereof, etc.

[0095] The active ingredients in the personal toilet pad composition of the present invention may also include an antipruritic ingredient. Suitable examples of antipruritic ingredients that can be used in the compositions of the present invention include hydrocortisone, methdilizine, and trimeprazine, mixtures thereof, etc.

[0096] Non-limiting examples of hair growth inhibitors that can be used in the personal toilet strip compositions of the present invention include 17-β-estradiol, anti-angiogenic steroids, turmeric extract, cyclooxygenase inhibitors, evening primrose oil, linoleic acid, etc. Suitable 5-α-reductase inhibitors, such as ethinylestradiol, genistine, and mixtures thereof.

[0097] Advantageously, the cationic skin-sensing agent or polymer is used in amounts of about 0.01 wt%, 0.1 wt%, or 0.2 wt% to about 1 wt%, 1.5 wt%, or 2.0 wt%.

[0098] Cationic cellulose can be polymerized in the Polymer JR® and LR® series from Amerchol Corp. (Edison, NJ, USA), such as salts of hydroxyethyl cellulose reacted with trimethylammonium-substituted epoxides, known industrially (CTFA) as Polyquaternium® 10. Another type of cationic cellulose includes polymerized quaternary ammonium salts of hydroxyethyl cellulose reacted with lauryl dimethylammonium-substituted epoxides, known industrially (CTFA) as Polyquaternium® 24. These materials are also available from Amerchol Corp. (Edison, NJ, USA) under the trade name Polymer LM-200®, as well as quaternary ammonium compounds such as alkyl dimethyl ammonium halides.

[0099] Particularly suitable types of cationic polysaccharide polymers that can be used are cationic guar gum derivatives, such as guar gum hydroxypropyltrimethylammonium chloride (commercially available from Rhone-Poulenc under the JAGUAR® brand). Examples include JAGUAR® C13S, which has a low degree of cationic substitution and high viscosity; JAGUAR® C15, which has a moderate degree of substitution and low viscosity; JAGUAR® C17 (high degree of substitution, high viscosity); JAGUAR® C16, which is a hydroxypropylated cationic guar gum derivative containing low levels of substituent groups and cationic quaternary ammonium groups; and JAGUAR® 162, which is a high-transparency, medium-viscosity guar gum with a low degree of substitution.

[0100] Particularly preferred cationic polymers are JAGUAR® C13S, JAGUAR® C15, JAGUAR® C17, JAGUAR® C16, and JAGUAR® C162, especially JAGUAR® C13S. Other cationic skin-sensing agents known in the art may be used, provided they are compatible with the formulations of the present invention.

[0101] Other preferred cationic compounds that can be used in this invention include amide quaternary ammonium compounds, such as quaternary ammonium propionates and lactates, as well as quaternary ammonium hydrolysates of silk or wheat proteins. Many of these compounds are available from McIntyre Group Ltd. (University Park, Ill.) as Mackine® aminofunctional amines, Mackalene® aminofunctional tertiary amine salts, and Mackpro® cationic protein hydrolysates.

[0102] In embodiments containing a hydrolyzed protein regulator, the average molecular weight of the hydrolyzed protein is preferably about 2500. Preferably, 90% of the hydrolyzed protein has a molecular weight between about 1500 and about 3500. In a preferred embodiment, MACKPRO® WWP (i.e., wheat germ dimethylamine hydrolyzed wheat protein) is added to the strip at a concentration of 0.1% (as is).

[0103] use The present invention also provides the use of the personal care composition according to the first aspect in the manufacture of a transparent personal care composition.

[0104] The present invention provides the use of a polyol comprising a polydiol in the manufacture of a transparent cleaning composition, said transparent cleaning composition being transparent at a temperature of up to 4°C.

[0105] The present invention also provides packaged personal care / personal washing products comprising: containers or bottles containing labels or advertisements intended for sale or distribution to consumers; and soap compositions according to a first aspect of the invention.

[0106] method The cleaning composition of the present invention is prepared using a method comprising the following steps: a. Dispersing the thickening polymer in water to obtain an aqueous mixture. b. Add fatty acids to an aqueous mixture and neutralize with an alkali to obtain liquid soap; c. Add the non-soap surfactant to the liquid soap from step “b”.

[0107] In step "a" or step "b", a chelating agent and a polyol are added.

[0108] Preferably, in the method of the present invention, at least 95% by weight of the fatty acids in the total soap are neutralized.

[0109] Preferably, in the method of the present invention, the weight ratio of soap to polyol in the cleaning composition ranges from 1.1:1 to 3:1.

[0110] Preferably, in the method of the present invention, the polyhydroxy diol is selected from C3 to C6 hydroxy diols and mixtures thereof.

[0111] Preferably, in the method of the present invention, the polyhydroxy glycol comprises 0.5 to 10% by weight of propylene glycol based on the weight of the cleaning composition.

[0112] Preferably, in the method of the present invention, the polyhydroxy diol comprises 1 to 10% by weight of glycerol based on the weight of the cleaning composition.

[0113] Preferably, in the method of the present invention, the composition has a transmittance of 90-99% at 650 nm.

[0114] Preferably, in the method of the present invention, the composition comprises 0.1 to 3% by weight of a chelating agent.

[0115] Preferably, in the method of the present invention, the composition comprises 0.01 to 2% by weight of a thickening polymer.

[0116] Preferably, in the method of the present invention, the thickening polymer is selected from cellulose-based polymers, gum-based polymers, acrylate polymers, and mixtures and combinations thereof.

[0117] Preferably, in the method of the present invention, the non-soap surfactant is selected from anionic surfactants, amphoteric surfactants, amphoteric surfactants, or nonionic surfactants.

[0118] Preferably, in the method of the present invention, the composition contains less than 0.5% by weight of electrolyte.

[0119] Example Although the invention has been described with reference to specific embodiments, it should be understood that many other forms and modifications will readily occur to those skilled in the art. The appended claims and the invention as a whole should be construed as covering all such obvious forms and modifications that fall within the true spirit and scope of the invention.

[0120] Example 1 Preparation of formulation Add water to the main container. Add the chelating agent and mix and heat. Add the polymer (HPMC), glycerol, and propylene glycol to the main container and mix thoroughly. Add the molten fatty acid to the mixture at 70 to 80°C and neutralize with alkali. Then add the non-soap surfactant to the main container, followed by additives such as fragrance, and mix thoroughly.

[0121] Compositions P8 to P10 (the compositions of the present invention) and comparative compositions P1 to P7 were prepared using the methods given above. All compositions have similar soap content but different ratios of long-chain to short-chain fatty acid soaps, polyol composition, or free fatty acids.

[0122] Transparency measurement The formulations within the scope of this invention, namely P8 to P10, have a transmittance of 90-99% at 650 nm.

[0123] Table 1: The data in the table clearly show that, when observed over a 19-week period at 4°C, compositions P8-P10 prepared according to the present invention were transparent even at the end of the 19 weeks, while compositions P1 to P7 were opaque or exhibited crystal formation. It can be seen that even with a high soap concentration of 18% by weight, composition P10 was transparent and stable at low temperatures. The presented data clearly demonstrate that when the total polyols are less than 7% by weight of the composition of the present invention, such as 4% by weight in P7 and 6% by weight in P6, the resulting compositions are opaque within 24 hours. Furthermore, if propylene glycol is absent, as in P2, P5, and P6, the resulting compositions are opaque within 24 hours. Therefore, it can be concluded that when the components and their respective concentrations are changed to fall outside the scope of the first aspect of the present invention, the compositions are not stable and transparent at 4°C.

Claims

1. A transparent liquid personal care composition comprising: a. 5 to 30 percent by weight of soap; b. 0.5 to 10% by weight of non-soap surfactants; c. 7 to 20% by weight of polyols, including 1 to 9% by weight of glycerol and 1 to 9% by weight of propylene glycol; d. 60 to 90% by weight water; and The free fatty acid content is less than 0.1% by weight; and the soap contains soaps of C14 to C30 long-chain fatty acids and C8 to C12 short-chain fatty acids in a weight ratio of 1:1.5 to 1:

10. The weight ratio of soap to polyol in the cleaning composition ranges from 1.1:1 to 3:

1.

2. The composition according to claim 1, wherein at least 95% by weight of the fatty acids in the total soap are neutralized.

3. The composition according to claim 1 or 2, wherein the composition has 90-99% transparency at 650 nm.

4. The composition according to any one of claims 1 to 3, wherein the composition comprises 0.1 to 3% by weight of a chelating agent.

5. The composition according to any one of claims 1 to 4, wherein the composition comprises 0.01 to 2% by weight of a thickening polymer.

6. The composition according to any one of claims 1 to 5, wherein the non-soap surfactant is selected from anionic surfactants, amphoteric surfactants, amphoteric surfactants, nonionic surfactants, and mixtures thereof.

7. The composition according to any one of claims 1 to 6, wherein the composition comprises less than 0.5% by weight of an electrolyte that is not a surfactant.

8. A method for manufacturing a transparent liquid personal care composition according to any one of claims 1 to 7, the method comprising the following steps: a. Dispersing the thickening polymer in water to obtain an aqueous mixture. b. Add fatty acids to the aqueous mixture and neutralize with alkali to obtain liquid soap; c. Add a non-soap surfactant to the liquid soap described in step "b". A chelating agent and a polyol are added in step "a" or step "b".

9. The method of claim 11, wherein the polyol is in the range of 7 to 20% by weight and comprises propylene glycol. The use of 10.7 to 20% by weight of polyol in the cleaning compositions according to claims 1 to 7 for providing transparency.

Images