Cleansing product

Abstract

To provide a cleansing agent which has high cleansing power, good rinsability, good slipperiness even when rubbed on with rough fingers and causes no tightness even when an amount used of the cleansing agen is increased.SOLUTION: There is provided a cleansing agent which contains 0.1 to 10 mass% of a component (a), 2 to 40 mass%of a component (b), 1 to 30 mass% of a component (c) and 20 to 90 mass% of a component (d), wherein a mass ratio ((b) / (a)) of component (b) to the component (a) is 1 to 40. The component (a): an alkylene oxide derivative represented by the formula (1), Z-[O(PO)m(EO)n(BO)pH]y (1). The component (b): a polyoxyethylene fatty acid ester represented by the formula (2), R1-O-(CH2-CH2-O)x-R2 (2). The component (C): one or two or more nonionic surfactants selected from a group consisting of a polyoxyethylene fatty acid ester having a trivalent or more polyhydric alcohol skeleton and a polyglycerol fatty acid ester, which have a HLB value of 5 to 15. The component (d): an oil agent which is liquid at 25°C.SELECTED DRAWING: None

Description

[Technical Field]

[0001] This invention relates to a cleansing agent. [Background technology]

[0002] Cleansing products used to remove makeup and sunscreen come in various forms, including oil, emulsion, cream, and lotion types. Among these, oil-based cleansers are particularly popular and widely used because they blend well with makeup and have excellent cleansing power. On the other hand, oil-based products, which contain a high concentration of oily components, have low compatibility with water, which can result in poor rinsing and a feeling of stickiness or greasiness.

[0003] Therefore, Patent Document 1 discloses an oil-type cleansing product that has excellent cleansing effect and excellent rinsability by incorporating a specific nonionic surfactant. Furthermore, Patent Document 2 discloses a cleansing product that not only has excellent cleansing effect and rinsability but also low stickiness by incorporating a specific AO derivative, a polyhydric alcohol, and a surfactant. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2002-241224 [Patent Document 2] Japanese Patent Publication No. 2006-232717 [Overview of the project] [Problems that the invention aims to solve]

[0005] However, in recent years, there has been an increase in makeup products with high oil and water resistance, and the opportunity to double cleanse using a cleansing product and a facial wash to remove makeup and wash the face has increased. Although the cleansing products disclosed in Patent Documents 1 and 2 have good cleansing power and rinsability, when used for double cleansing, they may remove too much sebum and cause a feeling of tightness. Therefore, there is a need for a cleansing product that does not cause skin tightness even when double cleansed.

[0006] On the other hand, hand sanitizing with disinfectants such as ethanol has become commonplace recently, but frequent sanitizing can degrease the skin, leading to dryness and roughness. When cleansing with rough hands, you may feel strong friction when rubbing the product in, or a tight feeling after washing. Therefore, there has been a demand for a cleansing product that provides good lubrication even when applied to rough hands, and does not leave a tight feeling after washing.

[0007] The objective of this invention is to provide a cleansing product that has high cleansing power, is easy to rinse, has good lubrication even when applied with rough hands, and does not leave a tight feeling after washing. [Means for solving the problem]

[0008] To solve the above problems, the inventors have found that by combining the specific components shown below, a product has high cleansing power, is easy to rinse, has good lubrication even when rubbed with rough hands, and does not leave the skin feeling tight after washing.

[0009] In other words, the present invention is as follows. A cleansing agent characterized by containing 0.1 to 10% by mass of component (a), 2 to 40% by mass of component (b), 1 to 30% by mass of component (c), and 20 to 90% by mass of component (d), wherein the mass ratio of component (b) to component (a) ((b) / (a)) is 1 to 40. (a) Alkylene oxide derivatives represented by the following formula (1) Z-[O(PO)m (EO) n (BO) p H] y (1) (In formula (1), Z is a residue obtained by removing the hydroxyl groups from a polyhydric alcohol having 2 to 6 hydroxyl groups, y is 2 to 6, PO is an oxypropylene group, EO is an oxyethylene group, BO is an oxybutylene group, m and n are respectively the average added mole numbers of the oxypropylene group PO and the oxyethylene group EO, where 0<m≦50 and 0<n≦50, p is the average added mole number of the oxybutylene group BO, where 0<p≦5, The mass ratio (PO / EO) of the oxypropylene group PO to the oxyethylene group EO is 1 / 5 to 5 / 1, The oxypropylene group PO, the oxyethylene group EO, and the oxybutylene group BO may be added randomly or in blocks, and random portions and block portions may coexist.) (b) A polyoxyethylene fatty acid ester represented by the following formula (2) R 1 -O-(CH2-CH2-O)x-R 2 (2) (In formula (2), R 1 and R 2 each represent an acyl group having 10 to 18 carbon atoms, x is the average added mole number of ethylene oxide, and is 1 to 50.) Component (c): One or more nonionic surfactants selected from the group consisting of polyoxyethylene fatty acid esters and polyglycerin fatty acid esters, which have an HLB value of 5 to 15 and a trihydric or higher polyhydric alcohol skeleton Component (d): An oil agent that is liquid at 25°C Effects of the Invention

[0010] The cleansing composition of the present invention has high cleansing power, good rinsability, good slipperiness even when applied and rubbed with rough skin on the hands, and does not cause a tight feeling after washing. Modes for Carrying Out the Invention

[0011] [Component (a)] Component (a) is an alkylene oxide derivative represented by Formula (1). Z is a residue obtained by removing the hydroxyl groups from a polyhydric alcohol having 2 to 6 hydroxyl groups (Z(OH)y), y is 2 to 6, PO is an oxypropylene group, EO is an oxyethylene group, and BO is an oxybutylene group.

[0012] m is the average added mole number of the oxypropylene group PO, and 0<m≦50. m is preferably 0.5 or more, more preferably 1 or more. Further, m is preferably 20 or less.

[0013] n is the average added mole number of the oxyethylene group EO, and 0<n≦50. n is preferably 0.5 or more, more preferably 1 or more. Further, n is preferably 30 or less.

[0014] p is the average added mole number of the oxyalkylene group BO, and 0<p≦5. p is preferably 0.3 or more, more preferably 1 or more. Further, p is preferably 4 or less.

[0015] The mass ratio (PO / EO) of the oxypropylene group PO to EO is 1 / 5 to 5 / 1. If the mass ratio (PO / EO) is excessively low, a tight feeling may occur when a large amount of the cleansing agent is used, and if it is excessively high, rinsability may decrease. In addition, EO, PO and BO may be added randomly or in blocks, or a random portion and a block portion may coexist. From such a viewpoint, the mass ratio (PO / EO) is set to 1 / 5 to 5 / 1. The mass ratio (PO / EO) is preferably 4.5 or less, more preferably 3 or less. Further, the mass ratio (PO / EO) is preferably 1 / 4 or more.

[0016] The content of component (a) in the cleansing agent is 0.1 to 10% by mass. If the content of component (a) is less than 0.1% by mass, the slipperiness during application may deteriorate, or a tight feeling may occur when a large amount of the cleansing agent is used, so the content is set to 0.1% by mass or more, preferably 0.5% by mass or more, and particularly preferably 1% by mass or more. In addition, if the content of component (a) exceeds 10% by mass, the cleansing power may be insufficient, so the content is set to 10% by mass or less, particularly preferably 8% by mass or less.

[0017] [Component (b)] Component (b) is a polyoxyethylene fatty acid ester represented by formula (2). R 1 -O-(CH2-CH2-O)x-R 2 (2)

[0018] In formula (2), R 1 and R 2 are acyl groups having 10 to 18 carbon atoms. R 1 and R 2 The fatty acids (R 1 OH) and (R 2 OH) corresponding to them are preferably fatty acids having 12 to 18 carbon atoms, particularly preferably fatty acids having 14 to 18 carbon atoms. Further, the fatty acid may be any of saturated, unsaturated, linear, and branched. Furthermore, the fatty acid may be a mixed fatty acid that is a mixture of various fatty acids. Note that R 1 and R 2They may be the same or they may be different.

[0019] Fatty acids (R 1 OH, R 2 Specific examples of OH) include lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, oleic acid, linoleic acid, and coconut oil fatty acids. Among these, oleic acid, stearic acid, and isostearic acid are preferred from the viewpoint of cleansing power and slipperiness during application, with isostearic acid being particularly preferred.

[0020] Acyl group R 1 and R 2 The esterification rate is preferably 60-98%, particularly preferably 70-98%, and even more preferably 85-98%. When the esterification rate is within this range, the cleansing power is further improved, and the slipperiness during application is also further improved.

[0021] In this specification, the esterification rate is the ratio of the number of hydroxyl groups in component (b) to the number of hydroxyl groups to which the fatty acid is esterified, and is a value calculated by measuring the saponification value (SV), acid value (AV), and hydroxyl value (OHV) of component (b) using the following formula. Esterification rate = [(SV-AV) / (SV-AV+OHV)] × 100

[0022] SV, AV, and OHV are values ​​measured according to the methods described in the following Japanese Industrial Standards (JIS). SV; JIS K-0070 4.1 AV; JIS K-0070 3.1 OHV; JIS K-1557 1

[0023] In formula (1), x is the average number of moles of ethylene oxide added, and is an integer between 1 and 50, preferably between 2 and 40, more preferably between 2 and 20, and particularly preferably between 5 and 15. If the average number of moles of ethylene oxide added is excessively high, rinsability may deteriorate or the cleansing power may decrease.

[0024] Component (b) may be of one type or two or more types. The content of component (b) in the cleansing agent is 2 to 40% by mass, preferably 5 to 30% by mass, and more preferably 10 to 25% by mass. If the content of component (b) is too low, the cleansing power may decrease. If the content of component (b) is too high, rinsing may worsen or a feeling of tightness may occur.

[0025] Furthermore, the mass ratio ((b) / (a)) of the mass of component (b) to component (a) is 1 to 40, preferably 1 to 30, and more preferably 2 to 20. If the mass ratio ((b) / (a)) is too low, the cleansing power and rinsability may decrease, and if it is too high, a feeling of tightness may occur.

[0026] [Component (c)] Component (c) is one or more nonionic surfactants selected from the group consisting of polyoxyethylene fatty acid esters and polyglycerin fatty acid esters having a polyhydric alcohol skeleton of trivalent or higher, with an HLB value of 5 to 15, preferably 5 to 12, more preferably 7 to 12. If the HLB value of the nonionic surfactant is excessively low or excessively high, the cleansing power may decrease.

[0027] HLB values ​​can be determined by the Griffin method, which is shown in the following formula. HLB value = 20 × (1 - S / A) S: Saponification value of esters A: Acid value of fatty acids

[0028] Examples of polyoxyethylene fatty acid esters having a polyhydric alcohol skeleton of three or more valents include polyoxyethylene fatty acid glyceryl and polyoxyethylene fatty acid sorbit. Specifically, examples include polyoxyethylene glyceryl tristearate, polyoxyethylene glyceryl triisostearate, polyoxyethylene glyceryl trioleate, polyoxyethylene glyceryl isostearate, polyoxyethylene glyceryl diisostearate, polyoxyethylene sorbitic acid tetraisostearate, polyoxyethylene sorbitic acid tetraoleate, and polyoxyethylene sorbitic acid isostearate. In particular, polyoxyethylene glyceryl triisostearate (cosmetic labeling name: PEG-20 glyceryl triisostearate (HLB value: 8.0), PEG-30 glyceryl triisostearate (HLB value: 10.0)) and polyoxyethylene sorbitic acid tetraisostearate (cosmetic labeling name: sorbitic acid tetraisostearate sorbitic acid 30 (HLB value: 11.1)) are preferred. The valency of the polyhydric alcohol skeleton constituting the polyoxyethylene fatty acid ester having a polyhydric alcohol skeleton is 3 or more, but is preferably 6 or less, and more preferably 3.

[0029] Examples of polyglycerin fatty acid esters include polyglyceryl stearate, polyglyceryl oleate, polyglyceryl triisostearate, polyglyceryl tristearate, and polyglyceryl trioleate. Polyglyceryl tristearate (indicated name: polyglyceryl-10 tristearate (HLB value: 7.5)) and polyglyceryl trioleate (indicated name: polyglyceryl-10 trioleate (HLB value: 7.0)) are particularly preferred.

[0030] As component (c), a single nonionic surfactant may be selected and used, or two or more nonionic surfactants may be used in appropriate combinations. However, from the viewpoint of cleansing power, it is preferable to contain one or more polyoxyethylene fatty acid esters having a polyhydric alcohol skeleton.

[0031] The content of component (c) is 1 to 30% by mass in the cleansing agent, preferably 2 to 25% by mass, and more preferably 3 to 20% by mass.

[0032] [Component (d)] Component (d) is a liquid oil at room temperature (25°C), and any liquid oil commonly used in cosmetics, pharmaceuticals, etc., can be used.

[0033] Specific examples of liquid oils include hydrocarbons, ethers, esters, vegetable oils, and silicone oils. Examples of hydrocarbons include liquid paraffin, squalane, and hydrogenated polyisobutene. Examples of ethers include dioctyl ether, ethylene glycol monolauryl ether, ethylene glycol dioctyl ether, and glycerol monooleyl ether. Examples of esters include glyceryl tri-2-ethylhexanoate, cetyl 2-ethylhexanoate, isononyl isononanoate, isotridecyl isononanoate, isopropyl myristate, butyl myristate, octyldodecyl myristate, isopropyl palmitate, ethylhexyl palmitate, ethyl stearate, octyl palmitate, isocetyl isostearate, butyl stearate, ethyl linoleate, isopropyl linoleate, ethyl oleate, isocetyl myristate, isostearyl myristate, isostearyl palmitate, cetyl palmitate, cetyl caprylate, decyl laurate, and hexyl laurate. Examples include decyl myristate, myristyl myristate, cetyl myristate, stearyl stearate, decyl oleate, cetyl ricinoleate, isostearyl laurate, isotridecyl myristate, octyl stearate, isocetyl stearate, isodecyl oleate, isopropyl isostearate, hexyl isostearate, glyceryl tricaprylate, glyceryl triisopalmitate, glyceryl triisostearate, isostearyl octanoate, octyl isononanoate, isostearyl isostearate, and octyldodecyl isostearate, caprylic / capric triglyceride, etc. Examples of vegetable oils include olive oil, soybean oil and jojoba seed oil, rice bran oil, macadamia seed oil and sunflower seed oil, while examples of silicone oils include methylpolysiloxane, methylphenylpolysiloxane and methylcyclopolysiloxane.

[0034] As component (d), a single liquid oil may be selected and used, or two or more liquid oils may be used in appropriate combinations. For example, two or more types can be used in combination from hydrocarbons, ethers, esters, vegetable oils, and silicone oils.

[0035] From the viewpoint of improving cleansing power, it is preferable that component (d) contains polar oils such as esters and vegetable oils, and in particular, it is preferable that it contains glyceryl tri-2-ethylhexanoate, cetyl 2-ethylhexanoate, ethylhexyl palmitate, cetyl palmitate, caprylic / capric triglyceride, isotridecyl isononanoate, isopropyl palmitate, olive oil, and jojoba seed oil.

[0036] The content of component (d) is 20 to 90% by mass in the cleansing agent, preferably 40 to 90% by mass, and more preferably 50 to 85% by mass.

[0037] The cleansing agent of the present invention may further contain water. The amount of water is preferably 10% by mass or less, more preferably 0.2 to 8% by mass, and even more preferably 0.5 to 5% by mass, relative to the total amount of cleansing agent.

[0038] The cleansing agent of the present invention may contain additives commonly used in cosmetics, as needed. Such additives are not particularly limited as long as they do not hinder the purpose of the present invention, but examples include oils, surfactants, humectants, thickeners, colorants, alcohols, UV protection agents, amino acids, vitamins, whitening agents, organic acids, inorganic salts, enzymes, antioxidants, stabilizers, preservatives, bactericides, anti-inflammatory agents, skin activators, blood circulation promoters, anti-seborrheic agents, anti-inflammatory agents, metal ion chelating agents, pH adjusters, astringents, cooling agents, fragrances, and dyes. However, those additives corresponding to components (a) to (d) are excluded. [Examples]

[0039] The present invention will be described in more detail below with reference to examples and comparative examples, but the present invention is not limited thereto.

[0040] <Synthesis example a1,a2,a3,a4,a5,a'1,a'2,a'3> One mole of the alcohol shown in Table 1 and 0.1% by mass of potassium hydroxide as a catalyst relative to the final weight of the alkylene oxide derivative were charged into an autoclave. After replacing the air in the autoclave with dry nitrogen, the catalyst was completely dissolved at 110°C while stirring. Next, a mixture of m × y moles of propylene oxide and n × y moles of ethylene oxide was added dropwise from a dropping device. After the addition was complete, the reaction was allowed to proceed at 110°C for 3 hours. Subsequently, p × y moles of 1,2-butylene oxide were added dropwise to the autoclave from a dropping device. After the addition was complete, the reaction was allowed to proceed at 110°C for 2 hours. The reaction product was then removed from the autoclave, neutralized with hydrochloric acid to pH 6-7, and dehydrated at -0.095 MPa (50 mmHg) and 100°C for 1 hour to remove any remaining water. Furthermore, filtration was performed to remove the neutralized salts generated by dehydration, yielding the compounds of synthesis examples a1, a2, a3, a4, a5, a'1, a'2, and a'3.

[0041] Alkylene oxide derivatives with the compositions shown in Table 1 below were synthesized in accordance with the above synthesis example.

[0042] [Table 1]

[0043] <Examples 1-10, Comparative Examples 1-10> The raw materials were weighed out according to the compositions listed in Tables 2, 3, and 4, and the cleansing agents were prepared by stirring them while heating until uniform. The makeup removal effect, rinsability, slipperiness during application, and the feeling of tightness when the amount of cleansing agent used was increased were evaluated as follows. The evaluation results are also listed in Tables 2 to 4.

[0044] The esterification rates (%) of components (b) and (b') used in the examples and comparative examples are as follows. PEG-8 Diisostearate: 88% PEG-12 Diisostearate: 91% PEG-40 distearate: 93% PEG-6 dioleate: 72% PEG-10 Diisostearate: 68% PEG-75 Dioleate: 85%

[0045] <Evaluation Method> (1) <Cleansing power> Ten healthy panelists, wearing waterproof mascara (Long UP Mascara Super WP, manufactured by Isehan Co., Ltd.), took 5g of the cleansing solution prepared in the example and comparative examples, lightly rubbed it for about 30 seconds, and then rinsed it off with lukewarm water. The mascara removal effect was then relatively evaluated on a 3-point scale according to the scoring criteria below. The total scores of the 10 participants were calculated and evaluated according to the following evaluation criteria. (Scoring Criteria) 3. When you feel that your mascara has come off completely. 2. If you feel that the mascara doesn't come off easily. 1. If you notice that your mascara is clearly not coming off well. (Evaluation Criteria) ◎: 25 points or more ○: 20 points or more, less than 25 points △: 15 points or more, less than 20 points ×: Less than 15 points

[0046] (2) <Rinsing ability> Ten healthy panelists, wearing waterproof mascara (Long UP Mascara Super WP, manufactured by Isehan Co., Ltd.), took 5g of the cleansing solution prepared in the example and comparative examples, lightly rubbed it in their hands for about 30 seconds, and then rinsed it off with lukewarm water. They then gave a relative evaluation of the rinsability on a 3-point scale according to the scoring criteria below. The total scores of the 10 participants were calculated and evaluated according to the following evaluation criteria. (Scoring Criteria) 3 points: If you feel that there is no sliminess during rinsing and that rinsing was quick and easy. 2 points: If you feel that a slight sliminess remains after rinsing, or that rinsing is somewhat difficult. 1 point: If the slime is difficult to remove and you feel that it is clearly difficult to rinse off. (Evaluation Criteria) ◎: 25 points or more ○: 20 points or more, less than 25 points △: 15 points or more, less than 20 points ×: Less than 15 points

[0047] (3) <Slipperiness when rubbing> Five healthy panelists, wearing waterproof mascara (Long UP Mascara Super WP, manufactured by Isehan Co., Ltd.), degreased their hands with alcohol. They then took 5g of the cleansing solution prepared in the example and comparative examples and lightly rubbed their hands for approximately 30 seconds. They then relatively evaluated the slipperiness of the cleansing solution on a three-point scale according to the scoring criteria below. The total scores of the five panelists were calculated and evaluated according to the following evaluation criteria. (Scoring Criteria) 2 points: If you feel that the lubrication is good when applying the coating. 1 point: If you feel that the lubrication is slightly poor when applying the coating. 0 points: If you felt the lubrication was poor when applying the coating. (Evaluation Criteria) ◎: 8 points or higher ○: 6 points or more, less than 8 points △: 4 points or more, less than 6 points ×: Less than 4 points

[0048] (4) <Tightness after washing> Ten healthy panelists, wearing waterproof mascara (Long UP Mascara Super WP, manufactured by Isehan Co., Ltd.), degreased their hands with alcohol, then took 5g of the cleansing solution prepared in the example and comparative examples, lightly rubbed it for about 30 seconds, and rinsed it off with lukewarm water. They then gave a relative evaluation of the tightness of their skin on a 3-point scale according to the scoring criteria below. The total scores of the 10 participants were calculated and evaluated according to the following evaluation criteria. (Scoring Criteria) 3 points: If you feel no tightness and your skin feels moisturized. 2 points: If you feel no tightness and your skin feels slightly moisturized. 1 point: If you feel tightness. (Evaluation Criteria) ◎: 8 points or higher ○: 6 points or more, less than 8 points △: 4 points or more, less than 6 points ×: Less than 4 points

[0049] [Table 2]

[0050] [Table 3]

[0051] [Table 4]

[0052] The cleansing products of Examples 1-10 were excellent in terms of makeup removal effectiveness, rinsability, smoothness during application, and lack of tightness.

[0053] On the other hand, sufficient effects were not obtained in comparative examples 1 to 10. In other words, Comparative Examples 1 to 3 contained comparative component (a') having a structure different from component (a) of the present invention, and therefore could not simultaneously satisfy the effects of the present invention.

[0054] Comparative Example 4 contained comparative ingredient (b') which had a structure different from ingredient (b), resulting in inferior cleansing power and rinsability. In Comparative Examples 5 and 6, (b) / (a) was outside the specified range, and therefore the effects of the present invention could not be simultaneously satisfied. In Comparative Example 7, because it did not contain component (a), it had inferior rinsability, slipperiness during application, and a feeling of tightness.

[0055] In Comparative Example 8, the absence of ingredient (b) resulted in inferior cleansing power, ease of rinsing, and a feeling of tightness. In Comparative Example 9, the cleansing power was inferior because the amount of component (a) was higher than the specified range. In Comparative Example 10, the content of component (b) was lower than the specified range, resulting in inferior rinsability and a feeling of tightness.

Claims

[Claim 1] A cleansing agent characterized by containing 0.1 to 10% by mass of component (a), 2 to 40% by mass of component (b), 1 to 30% by mass of component (c), and 20 to 90% by mass of component (d), wherein the mass ratio of component (b) to component (a) ((b) / (a)) is 1 to 40. (a) Alkylene oxide derivatives represented by the following formula (1) Z-[O(2O) ｍ (EO) ｎ (BO) ｐ H] ｙ (1) (In formula (1), Z is a residue obtained by removing the hydroxyl groups from a polyhydric alcohol having 2 to 6 hydroxyl groups. y is between 2 and 6. PO is an oxypropylene group, EO is an oxyethylene group, BO is an oxybutylene group, m and n are the average number of moles added of the oxypropylene group PO and the oxyethylene group EO, respectively, where 0 < m ≤ 50 and 0 < n ≤ 50. p is the average number of moles of the oxybutylene group BO added, where 0 < p ≤ 5. The mass ratio (PO / EO) of the oxypropylene group PO to the oxyethylene group EO is 1 / 5 to 5 / 1. The oxyethylene group EO, the oxypropylene group PO, and the oxybutylene group BO may be added randomly or in a block-like manner, and a mixture of random and block-like structures may also be present. (b) Polyoxyethylene fatty acid ester represented by the following formula (2) R １ -O-(CH ２ -CH ２ -O)x-R ２ (2) (In formula (2), R １ and R ２ each represent an acyl group having 10 to 18 carbon atoms, x is the average number of moles of ethylene oxide added, and is between 1 and 50. Component (c): One or more nonionic surfactants selected from the group consisting of polyoxyethylene fatty acid esters and polyglycerin fatty acid esters having an HLB value of 5 to 15 and a polyhydric alcohol skeleton of trivalent or higher. Ingredient (d): Liquid oil at 25°C

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