JP2016124866A - Cleansing cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cleansing cosmetic having an excellent cleansing effect, no skin irritancy or no stickiness although the amount used of a surfactant is reduced.SOLUTION: There is provided a cleansing cosmetic which comprises (A) a polyoxyethylenepolyoxypropylene glyceryl ether having an average addition molar number of the oxyethylene group of 1 to 100 and an average addition molar number of the oxypropylene group of 1 to 50, (B) one or more nonionic surfactants having an HLB of 8 or more selected from a POE-sorbitan fatty acid ester, a POE-sorbit fatty acid ester, a POE-glycerol fatty acid ester, a POE-POP-alkyl ether, a POE-castor oil-cured castor oil derivative, a polyglycerol fatty acid ester and an alkanol amide and (C) water.SELECTED DRAWING: None

Description

  The present invention relates to a cleansing cosmetic that has an excellent cleaning effect, has no irritation to skin and is not sticky, and has a good feeling of use.

In recent years, with the development of foundations and makeup cosmetics that are resistant to sebum and sweat, the cleansing agents having sufficient cleansing power to remove these difficult-to-remove cosmetics are required. However, when the cleansing power becomes strong, the sebum is excessively removed, which accelerates the drying of the skin and may cause skin problems such as rough skin and fine lines.
In addition, oil-based detergents and water-in-oil detergents that are highly blended with oils that are highly compatible with makeup stains and sebum stains are known to have excellent cleansing effects, but oily components remain after use. As a result, stickiness remains, and so-called double face washing is required, such as using a cleaning agent again.

The development of an aqueous preparation that does not require this double facial cleansing has been widely performed in the past. For example, Patent Document 1 describes a detergent that uses a nonionic surfactant and alcohol in combination. However, in the present situation, when a large amount of surfactant and alcohol are contained, the irritation to the skin becomes stronger, and there are many concerns about safety.
On the other hand, Patent Document 2 discloses that a polyoxyethylene polyoxypropylene glycerin fatty acid ester which is a surfactant is used to improve the feeling of use of the cleaning agent. The amount of active agent must be increased, and skin irritation is still a problem.

Japanese Patent Laid-Open No. 9-40525 JP 2002-317195 A

  The object of the present invention has been made in view of the above-mentioned problems of the prior art, and the object is related to the fact that the amount of surfactant used is reduced in order to reduce irritation to the skin. Therefore, it is to provide a cleansing cosmetic that has an excellent cleaning effect, does not irritate the skin and is not sticky, and has a good feeling of use.

  As a result of intensive studies by the present inventors in order to achieve the above-mentioned object, when a specific amount of polyoxyethylene polyoxypropylene glyceryl ether and a specific nonionic surfactant are blended into a cleansing cosmetic, it is applied to the skin. Discovered that it is possible to alleviate irritation and stickiness and to reduce the blending amount of the surfactant, it is possible to improve the cleaning effect of the surfactant, and completed the present invention I came to let you.

  That is, the present invention relates to (A) polyoxyethylene polyoxypropylene glyceryl ether having an average addition mole number of oxyethylene groups of 1 to 100 and an average addition mole number of oxypropylene groups of 1 to 50, and (B) POE. -One or more selected from sorbitan fatty acid ester, POE-sorbite fatty acid ester, POE-glycerin fatty acid ester, POE-POP-alkyl ether, POE-castor oil hydrogenated castor oil derivative, polyglycerin fatty acid ester, alkanolamide A cleansing cosmetic comprising a nonionic surfactant having an HLB of 8 or more and (C) water.

  According to the present invention, although the amount of the surfactant used is reduced in order to reduce irritation to the skin, it has an excellent cleaning effect and has no irritation or stickiness to the skin. It is possible to provide cleansing cosmetics with a good feeling of use.

Hereinafter, preferred embodiments according to the present invention will be described in detail.
In the following, polyoxyethylene is sometimes abbreviated as POE, and polyoxypropylene is sometimes abbreviated as POP.
The polyoxyethylene polyoxypropylene glyceryl ether (A) used in the present invention has an average addition mole number of polyoxyethylene groups of 1 to 100 and an average addition mole number of oxypropylene groups of 1 to 50. Further, the order of adding ethylene oxide and propylene oxide is not particularly limited, and the ratio of the oxyethylene group to the total of the oxyethylene group and the oxypropylene group is not particularly limited.

  The average added mole number of the oxyethylene group is 1 to 100, preferably 3 to 75, and more preferably 5 to 50. If the average added mole number of the oxyethylene group is too small, blending into an aqueous preparation becomes difficult, and if it is too large, stickiness may be strongly felt. Moreover, the average addition mole number of the said oxypropylene group is 1-50, Preferably it is 3-45, More preferably, it is 5-40. If the average number of added moles of oxypropylene groups is too small, it is difficult to enhance the cleaning effect of the surfactant, and if it is too high, it may be difficult to incorporate into an aqueous preparation.

Further, in the polyoxyethylene polyoxypropylene glyceryl ether of the present invention, the oxyethylene group and the oxypropylene group may be added in blocks or randomly, but they are added in blocks. Is preferred. Polyoxyethylene polyoxypropylene glyceryl ether can also be produced by a known method. Specifically, ethylene oxide and propylene oxide are subjected to addition polymerization at 130 to 160 ° C. with respect to glycerol under an alkali catalyst. It is obtained by.
The polyoxyethylene polyoxypropylene glyceryl ether of the present invention may be a commercially available product. For example, “NIKKOL SG-G2424” (manufactured by Nikko Chemicals), “Unilube 50TG-32” (manufactured by NOF Corporation), “Adeka Carpol GH-” 200 "(manufactured by ADEKA)," New Pole GEP-2800 "(manufactured by Sanyo Chemical Industries) can be used.

The blending amount of the polyoxyethylene polyoxypropylene glyceryl ether of the present invention is preferably 5 to 50% by mass, more preferably 10 to 40% by mass, and further preferably 15 to 30% by mass in the total amount of the cleansing cosmetic. Within such a range, the effect of increasing the cleaning effect of the surfactant can be exhibited.
Usually, the polyoxyethylene polyoxypropylene glyceryl ether is mainly used as a moisturizer not only in cosmetics for cleansing applications but also in general cosmetics. Therefore, in order to satisfy the effect as a moisturizing agent, the blending amount is usually less than 5% by mass and at most less than 10% by mass with respect to the total amount of the cosmetic. However, by combining the amount of polyoxyethylene polyoxypropylene glyceryl ether and nonionic surfactant, which is usually more than that, it exhibits the effect of increasing the cleaning effect of the nonionic surfactant. The compounding quantity of surfactant can be reduced.

  (B) HLB8 or more nonionic surfactant used in the present invention is POE-sorbitan fatty acid ester, POE-sorbite fatty acid ester, POE-glycerin fatty acid ester, POE-POP-alkyl ether, POE-castor oil hydrogenated castor oil One or more selected from derivatives, polyglycerol fatty acid esters, and alkanolamides. These nonionic surfactants are preferable in terms of enhancing the cleaning effect. Nonionic surfactants with an HLB of 8 or less have low irritation, but are poor in sebum removal effect, feel sticky at the time of application, and deteriorate in stability.

The blending amount of the (B) HLB8 or higher nonionic surfactant used in the present invention is 1 to 30% by mass, preferably 2 to 25% by mass, based on the total amount of the cleansing cosmetic.
In particular, in the lotion type cleansing cosmetic, the blending amount of the (B) HLB8 or higher nonionic surfactant is 1 to 10% by mass, preferably 2 to 8% by mass in the total amount of the cleansing cosmetic. .
Moreover, it is preferable that ratio of the compounding quantity of said (A) polyoxyethylene polyoxypropylene glyceryl ether and (B) HLB8 or more nonionic surfactant is 1: 1-10: 1. Such a range is effective in improving the cleansing power.

In the cleansing cosmetic of the present invention, in addition to the above essential components, various components that are usually used in cosmetics, for example, oily components, higher alcohols, polar fats and oils, active ingredients, moisturizing components, as long as the effects of the present invention are not impaired. Antibacterial components, viscosity modifiers, pigments, fragrances and the like can be blended and manufactured according to conventional methods.
As a method for blending the cleansing cosmetic composition of the present invention into the above-mentioned composition, the polyoxyethylene polyoxypropylene glyceryl ether used in the present invention can be arbitrarily dissolved in water and oil. Without using it, it can be easily mixed by a conventional method using a paddle mixer or the like.

Examples of the dosage form of the cleansing cosmetic of the present invention include lotions, gels, milks, creams and the like using water-based, oil-in-water types, water-in-oil types, and the like, but are not particularly limited.
The present invention will be described in more detail with reference to examples of the present invention, but the present invention is not limited thereto.
In addition, in the following examples, description of a compounding quantity means the mass% unless there is particular notice.

<Example 1>
1. Preparation of polyoxyethylene polyoxypropylene glyceryl ether Compounds A1 to A7 were obtained according to the number of added moles of oxyethylene groups and oxypropylene groups shown in Table 1 below.

<Example 2>
1. Preparation of Cleansing Cosmetic A uniform cleansing cosmetic was prepared by stirring and mixing the components shown in Tables 2 and 3 at room temperature for 30 minutes using a paddle mixer.

2. Evaluation of cleansing cosmetics Each of the following four items was evaluated.
(1) Sebum removal effect An artificial sebum composition was prepared as a model of dirt. Subsequently, a transpore tape was applied to the slide glass, and the artificial sebum composition was applied within 2 cm × 2 cm, followed by natural drying for 2 hours. After applying the prepared cleansing cosmetic and applying it with a finger, the state was observed after tapping with cotton. The cleaning effect was evaluated as follows from the mass change of the artificial sebum composition before and after hitting with cotton. Evaluation was determined according to the following criteria.
(Evaluation criteria)
A: Decrease by 30% or more B: Decrease by 20% or more and less than 30% C: Decrease by 10% or more and less than 20% D: Decrease by 10% or less

(2) No eye irritation The foundation was applied to 20 panelists, and the eye irritation when each cleansing cosmetic was used after 2 hours was evaluated. Evaluation was determined according to the following criteria.
(Evaluation criteria)
A: All people did not feel eye irritation.
B: 1 or more and 2 or less people felt eye irritation, but it was an acceptable weak irritation.
C: 1 or more and 2 or less people felt eye irritation, but it was an unacceptably strong irritation.
D: Three or more people felt eye irritation.

(3) Non-stickiness The foundation was applied to 20 panelists, and the non-stickiness when cleansing cosmetics were used after 2 hours was evaluated. Evaluation was determined according to the following criteria.
(Evaluation criteria)
A: All people did not feel sticky.
B: From 1 to 2 people felt sticky.
C: 2 to 3 people felt sticky.
D: Three or more people felt sticky.

(4) Stability After the preparation of each cosmetic, each sample was put in a glass bottle and allowed to stand in a 5 ° C. thermostatic bath, and the appearance after 24 hours was confirmed by an optical microscope and visual observation. Evaluation was determined according to the following criteria.
(Evaluation criteria)
A: There was no change in appearance.
B: A small amount of precipitate was produced at 5 ° C., and when it was returned to room temperature, the precipitate disappeared and the appearance returned to a uniform and normal appearance.
C: A considerable amount of precipitate was formed at 5 ° C., and the precipitate disappeared when the temperature was returned to room temperature to return to a uniform and normal appearance.
D: Precipitation is formed or two layers are separated at 5 ° C.

3. Results From the results of Tables 2 and 3, Inventions 1 to 8 were able to obtain good results in each evaluation of sebum removal effect, irritation, stickiness, and stability. On the other hand, the comparative product 1 containing the compound A6 in which only 20 mol of ethylene oxide group was added was inferior in the skin removing effect and further became a cleansing cosmetic having a problem of stickiness. Moreover, the comparative product 2 which mix | blended compound A7 which added only 20 mol of propylene oxide groups was inferior to the effect of removing sebum like the comparative product 1, and also became a cleansing cosmetic with a problem in stability. Moreover, the comparative product 3 which mix | blended the sorbitan monooleate which does not correspond to the (B) nonionic surfactant of this invention was inferior to the skin removal effect and stability. The comparative product 4 in which only the compound A1 was blended without blending the nonionic surfactant (B) of the product of the present invention showed almost no sebum removal effect.
From the results of Table 4, when the blending amount of (A) polyoxyethylene polyoxypropylene glyceryl ether used in the cleansing cosmetic of the present invention is 5 to 50% by mass (invention products 9 to 14), the evaluation is excellent. It became clear, and it became possible to reduce the compounding quantity of a nonionic surfactant.

<Prescription Example 1>
Cleansing lotion POP (24) POE (24) glyceryl ether 20.0 (mass%)
2. 1,3-butylene glycol 5.0
3. POE (7) Palm oil fatty acid glyceryl 3.0
4). Mono-coconut oil fatty acid POE (20) sorbitan 2.0
5). POE (20) POP (4) Cetyl ether 1.0
6). Preservative appropriate amount 7. pH adjuster appropriate amount8. Chelating agent appropriate amount9. Purified water Residual preparation method: Weigh components 1 to 8, heat and uniformly dissolve. Mixing was performed using a paddle mixer, and the mixture was finished when it became uniform.
Result: All of the obtained cleansing lotions had excellent cleaning effects and were good cosmetics with no skin irritation and stickiness.

<Prescription Example 2>
Cleansing gel POP (40) POE (20) glyceryl ether 20.0 (mass%)
2. Dipropylene glycol 5.0
3. Mono palm oil fatty acid POE (20) sorbitan 5.0
4). PEG-20 glyceryl triisostearate 5.0
5). Polyoxyethylene methyl glucoside (10E.O.) 5.0
6). Carbomer 0.4
7). Purified water residue 8. Potassium hydroxide 0.14
9. Chelating agent appropriate amount10. Purified water 10.0
Preparation method: Components 1 to 4 are weighed, heated and stirred, uniformly dissolved, and then cooled to 45 ° C. Ingredients 5-7 are stirred at room temperature to swell the polymer. Components 8 to 10 are added to components 5 to 7 and stirred, and components 1 to 4 are gradually added.
Result: The obtained cleansing gel was a cosmetic with an excellent cleaning effect and a good feeling of use with no irritation to the skin or stickiness.

<Prescription Example 3>
Cleansing milk POP (10) POE (40) glyceryl ether 20.0 (mass%)
2. Cyclopentasiloxane 10.0
3. Mineral oil 8.0
4). POE (7) Palm oil fatty acid glyceryl 10.0
5). PEG (60) hydrogenated castor oil 1.0
6). Tetraoleic acid POE (30) Sorbit 2.0
7). Cetearyl alcohol 0.5
8). Glycerin 10.0
9.1,3-Butylene glycol 3.0
10. Carbomer 0.2
11. (Acrylates / alkyl acrylate (C10-30)) cross polymer 0.1
12 Preservative appropriate amount13. Chelating agent appropriate amount14. Purified water residue 15. Potassium hydroxide 0.03
16. Purified water 5.0
Preparation method: Components 1 to 7 and components 8 to 14 are heated and dissolved uniformly. While maintaining at 80 ° C., components 1 to 7 are added to components 8 to 14 and emulsified. Ingredients 15-16 are added slowly and cooled to 35 ° C. with stirring.
Result: The obtained cleansing milk was a cosmetic having an excellent cleaning effect and having a good feeling of use with no irritation to the skin or stickiness.

  The cleansing cosmetic composition of the present invention has an excellent cleansing effect on the skin despite the fact that the amount of nonionic surfactant used is reduced in order to reduce irritation to the skin. There is no irritation or stickiness, and it has good usability.

Claims (2)

A cleansing cosmetic comprising the following components (A) to (C): (A) Polyoxyethylene polyoxypropylene glyceryl ether having an average addition mole number of oxyethylene groups of 1 to 100 and an average addition mole number of oxypropylene groups of 1 to 50 (B) POE-sorbitan fatty acid ester, POE-sorbit 1 or 2 or more types of HLB selected from fatty acid ester, POE-glycerin fatty acid ester, POE-POP-alkyl ether, POE-castor oil hydrogenated castor oil derivative, polyglycerin fatty acid ester, alkanolamide is 8 or more Ionic surfactant (C) water The cleansing cosmetic according to claim 1, wherein the blending amount of the component (A) polyoxyethylene polyoxypropylene glyceryl ether is 5 to 50% by mass in the total amount of the cleansing cosmetic.