JP2020100581A - Cleansing cosmetics - Google Patents

Abstract

To provide cleansing cosmetics that have an excellent cleaning effect despite of having a reduced amount of surfactant used, and have no skin irritation or stickiness to the skin.SOLUTION: Provided is a cleansing cosmetic containing: (A) a polyoxypropylene polyglyceryl ether having an average number of added moles of propylene oxide of 1 to 18 and a degree of glycerin polymerization of 1 to 3; (B) nonionic surfactant in which one or more HLB selected from POE-sorbitan fatty acid ester, POE-sorbit fatty acid ester, POE-glycerin fatty acid ester, POE/POP-alkyl ether, POE-castor oil hydrogenated castor oil derivative, polyglycerin fatty acid ester, and alkanolamide is 8 or more; and (C) water.SELECTED DRAWING: None

Description

The present invention relates to a cleansing cosmetic composition which has an excellent cleaning effect, has no irritation to the skin and is non-greasy, and has a good feeling in use.

In recent years, with the development of foundations and make-up cosmetics that are strong against sebum and sweat and hard to remove, a cleansing agent having sufficient cleansing power to remove these hard-to-remove cosmetics has been demanded. However, when the cleansing power becomes strong, the sebum is excessively removed, which may accelerate the dryness of the skin and cause skin troubles such as rough skin and fine wrinkles.
Further, it is known that an oil-based cleaning agent or a water-in-oil type cleaning agent that is highly mixed with an oil agent highly compatible with makeup stains and sebum stains has excellent cleansing effect, but the oily component remains after use. As a result, stickiness remains, and a so-called double face wash is required, such as using a cleaning agent again.

The development of an aqueous preparation that does not require this double face wash has been widely performed in the past, and for example, Patent Document 1 describes a detergent containing a nonionic surfactant and alcohol in combination. However, in the present situation, when a large amount of a surfactant and alcohol are contained, 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 in order to improve the feeling of use of the cleaning agent. It is necessary to increase the amount of the active agent compounded, and the irritation to the skin is still a problem. Further, in Patent Document 3, by combining (A) polyoxyethylene polyoxypropylene glyceryl ether and (B) a specific non-ionic surfactant having an HLB of 8 or more, the amount of surfactant used is reduced. Cleansing cosmetics have been reported.

JP, 9-40525, A JP, 2002-317195, A JP, 2016-124866, A

The object of the present invention has been made in view of the above problems of the prior art, and the object is to reduce the amount of the surfactant used in order to reduce irritation to the skin. In addition, the present invention provides a cleansing cosmetic composition that has an excellent cleaning effect, has no irritation to the skin, is not sticky, and has a good feeling in use.

As a result of intensive studies by the present inventors in order to achieve the above-mentioned object, a cleansing cosmetic composition contains a specific amount of polyoxypropylene polyglyceryl ether (glycerin polymerization degree: 1 to 3) and a specific nonionic surfactant. It is possible to improve the cleaning effect of the surfactant, although the irritation to the skin and stickiness can be alleviated by blending with and the amount of the surfactant can be reduced. Heading out, the present invention has been completed.

That is, the present invention provides (A) a polyoxypropylene polyglyceryl ether (glycerin degree of polymerization: 1 to 3) having an average added mole number of propylene oxide of 1 to 18, and (B) POE-sorbitan fatty acid ester and POE-sorbit. One or more 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, and alkanolamide is 8 or more. A cleansing cosmetic comprising an ionic surfactant and (C) water.

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

Hereinafter, preferred embodiments of the present invention will be described in detail.
In the following, propylene oxide may be abbreviated as PO and polyoxypropylene as abbreviated as POP.

The polyoxypropylene polyglyceryl ether (A) used in the present invention has an average number of added moles of polypropylene oxide of 1 to 18. The degree of polymerization of the polyglycerin group is 1 to 3.
The average added mole number of the oxypropylene group is 1 to 18, preferably 5 to 15. If the average number of moles of oxypropylene groups added is too small, it may be difficult to enhance the cleaning effect of the surfactant, and if it is too high, it may be difficult to incorporate it in an aqueous preparation.

Polyoxypropylene polyglyceryl ether can also be produced by a known method, and specifically, it can be obtained by addition-polymerizing propylene oxide to polyglycerin under an alkali catalyst at 130 to 160°C.
The polyoxypropylene polyglyceryl ether of the present invention may be a commercially available product, for example, "NIKKOL SG-DG900P" (diglyceryl PO9 mol adduct, manufactured by Nikko Chemicals), "NIKKOL SG-DG1400P" (diglyceryl PO14 mol adduct, sunlight). Chemicals), "NIKKOL SG-TG900P" (triglyceryl PO9 mole adduct, Nikko Chemicals), "NIKKOL SG-TG1400P" (triglyceryl PO14 mole adduct, Nikko Chemicals) can be used.

The content of the polyoxypropylene polyglyceryl ether of the present invention is preferably 0.1 to 20% by mass, more preferably 1 to 15% by mass, and further preferably 2 to 10% by mass in the total amount of the cleansing cosmetic composition. Within such a range, the effect of increasing the cleaning effect of the surfactant can be exhibited.
Usually, the polyoxypropylene polyglyceryl ether is mainly used as a moisturizer in not only cosmetics for cleansing but also cosmetics in general. Therefore, in order to satisfy the effect as a moisturizing agent, the content thereof is usually less than 10% by mass based on the total amount of the cosmetic. However, the combination of a usual amount of polyoxypropylene glyceryl ether and a nonionic surfactant exerts the effect of increasing the cleaning effect of the nonionic surfactant. The compounding amount can be reduced.

(B) HLB8 or more nonionic surfactants used in the present invention include POE-sorbitan fatty acid ester, POE-sorbit fatty acid ester, POE-glycerin fatty acid ester, POE/POP-alkyl ether, POE-castor oil and hydrogenated castor oil. One or more selected from derivatives, polyglycerin fatty acid esters, and alkanolamides. These nonionic surfactants are preferable in terms of enhancing the cleaning effect. A nonionic surfactant having an HLB of 8 or less has low irritation, but has a poor sebum-removing effect, feels stickiness during application, and has poor stability.

The amount of (B) HLB of 8 or more 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 composition.
In particular, in the lotion type cleansing cosmetic, the blending amount of the nonionic surfactant (B) HLB8 or more is 1 to 10% by mass, preferably 2 to 8% by mass based on the total amount of the cleansing cosmetic. ..
In addition, the ratio of the compounding amount of the (A) polyoxypropylene polyglyceryl ether and the (B) HLB of 8 or more nonionic surfactant is preferably 1:10 to 3:1. Within such a range, it is effective in improving the cleansing power.

In the cleansing cosmetic composition of the present invention, in addition to the above essential components, in a range that does not impair the effects of the present invention, various components usually used in cosmetics, for example, oily ingredients, higher alcohols, polar oils and fats, active ingredients, moisturizing ingredients. , An antibacterial component, a viscosity modifier, a dye, a fragrance, etc. can be added, and the compound is produced according to a conventional method.
As a method of adding the cleansing cosmetic composition of the present invention to the above-mentioned composition, it is possible to easily mix the cleansing cosmetic composition simply by using a paddle mixer or the like by a conventional method without using a special work or a machine.

Examples of the dosage form of the cleansing cosmetic composition of the present invention include, but are not particularly limited to, lotions, gels, milks, creams and the like using an aqueous type, an oil-in-water type, a water-in-oil type and the like.
Hereinafter, 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, the description of the blending amount means mass% unless otherwise specified.

Example 1
1. Preparation of Polyoxypropylene Polyglyceryl Ether Compounds A1 to A7 were obtained according to the degree of glycerin polymerization and the number of moles of oxypropylene group (PO) added 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 The following four items were evaluated.
(1) Effect of removing sebum An artificial sebum composition was prepared as a model of dirt. Subsequently, a transpore tape was attached to a slide glass, the artificial sebum composition was applied within 2 cm×2 cm, and then naturally dried for 2 hours. The prepared cleansing cosmetic composition was applied and blended with a finger, and after hitting with cotton, the condition was observed. The cleaning effect was evaluated from the change in mass of the artificial sebum composition before and after tapping with cotton as follows. The evaluation was judged according to the following criteria.
(Evaluation criteria)
A: 30% or more decrease B: 20% or more and less than 30% decrease C: 10% or more and less than 20% decrease D: 10% or less decrease

(2) No eye irritation The foundation was repeatedly applied to 20 panelists, and after 2 hours, each cleansing cosmetic composition was evaluated for eye irritation. The evaluation was judged according to the following criteria.
(Evaluation criteria)
A: Everyone did not feel eye irritation.
B: One or more and two or less people felt eye irritation, but it was an acceptable weak irritation.
C: One or more and two or less people felt eye irritation, but it was an unacceptable strong irritation.
D: Three or more people felt eye irritation.

(3) Non-greasiness The foundation was repeatedly applied to 20 panelists, and after 2 hours, the non-greasiness when the cleansing cosmetics were used was evaluated. The evaluation was judged according to the following criteria.
(Evaluation criteria)
A: Everyone did not feel sticky.
B: One or more and two or less people felt sticky.
C: 3 to 4 people felt sticky.
D: Five or more people felt sticky.

(4) Stability After preparation of each cosmetic, each sample was placed in a glass bottle and allowed to stand in a 5° C. constant temperature bath, and the appearance after 24 hours was visually confirmed. The evaluation was judged according to the following criteria.
(Evaluation criteria)
A: There was no change in appearance.
B: A slight amount of precipitate was observed at 5°C, and when the temperature was returned to room temperature, the precipitate disappeared and the appearance became uniform and normal.
C: A considerable amount of precipitate was formed at 5° C., and when the temperature was returned to room temperature, the precipitate disappeared, and a uniform and normal appearance was restored.
D: At 5° C., a precipitate is formed or a two-layer separated state is established.

3. Results From the results of Tables 2 and 3, the invention products 1 to 8 were able to obtain good results in each evaluation of sebum removing effect, irritation, stickiness, and stability. On the other hand, Comparative Product 1 in which the compound A6 in which 9 mol of propylene oxide was added to hexagulin having a degree of glycerin polymerization of 6 was blended was a cleansing cosmetic having a poor skin removing effect and a problem of stickiness. In addition, the comparative product 2 in which the compound A7 in which 30 mol of propylene oxide was added to diglycerin having a glycerin polymerization degree of 2 was blended, was similar to the comparative product 1, inferior in the sebum-removing effect, and had a problem in stability. It became cosmetics. Further, Comparative Product 3 in which sorbitan monooleate, which does not correspond to the nonionic surfactant (B) of the present invention, was blended resulted in poor skin removing effect and stability. Comparative product 4 in which the non-ionic surfactant (B) of the present invention was not compounded, but only compound A1 was compounded, and the result showed almost no sebum removing effect.
From the results in Table 4, it was revealed that when the compounding amount of the (A) polyoxypropylene polyglyceryl ether used in the cleansing cosmetic composition of the present invention was 1 to 20% by mass (invention products 9 to 14), the evaluation was excellent, It has become possible to reduce the blending amount of the nonionic surfactant.

Prescription example 1. Cleansing lotion 1. POP(9) diglyceryl ether 10.0 (mass%)
2.1,3-butylene glycol 5.0
3. POE (7) coconut oil fatty acid glyceryl 3.0
4. Monococonut oil fatty acid POE (20) sorbitan 2.0
5. POE (20) POP (4) cetyl ether 1.0
6. Preservative proper amount 7. pH adjusting agent 8. Chelating agent 9. Purified water Residual (preparation method) Components 1 to 8 are weighed, heated and uniformly dissolved. Mix using a paddle mixer and stop when uniform.
(Results) Each of the resulting cleansing lotions had a good cleansing effect, and was a cosmetic with good feeling of use without irritation to the skin or stickiness.

Prescription example 2. Cleansing gel 1. POP(14) diglyceryl ether 10.0 (mass%)
2. Dipropylene glycol 5.0
3. Monococonut oil fatty acid POE (20) sorbitan 5.0
4. PEG-20 glyceryl triisostearate 5.0
5. Polyoxyethylene methyl glucoside (10 EO) 5.0
6. Carbomer 0.4
7. Purified water Residual 8. Potassium hydroxide 0.14
9. Chelating agent Suitable amount 10. Purified water 10.0
(Preparation method) Ingredients 1 to 4 are weighed, stirred under heating, uniformly dissolved, and then cooled to 45°C. Components 5-7 are stirred at room temperature to swell the polymer. Ingredients 8-10 are added to Ingredients 5-7, stirred, and Components 1-4 are gradually added.
(Results) The obtained cleansing gel was a cosmetic composition having an excellent cleaning effect and having no feeling of skin irritation or stickiness and having a good feeling in use.

Prescription example 3. Cleansing milk 1. POP (9) triglyceryl ether 5.0 (mass%)
2. Cyclopentasiloxane 10.0
3. Mineral oil 8.0
4. POE (7) coconut 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)) Crosspolymer 0.1
12. Preservative appropriate amount 13. Suitable amount of chelating agent 14. Purified water-Residual 15. Potassium hydroxide 0.03
16. Purified water 5.0
(Preparation method) Components 1 to 7 and components 8 to 14 are heated and uniformly dissolved. While maintaining the temperature at 80° C., Components 1 to 7 are added to Components 8 to 14 and emulsified. Pre-dissolved components 15-16 are added slowly and cooled to 35°C with stirring.
(Results) The obtained cleansing milk was a cosmetic having an excellent cleansing effect, and having no feeling of skin irritation or stickiness and a good feeling in use.

The cleansing cosmetic composition of the present invention has an excellent cleansing effect, even though the amount of the nonionic surfactant used is reduced in order to reduce irritation to the skin, and to the skin. It has no irritation or stickiness and has a good feeling in use.

Claims (2)

A cleansing cosmetic comprising the following components (A) to (C). (A) Polyoxypropylene polyglyceryl ether (B) POE-sorbitan fatty acid ester, POE-sorbit fatty acid ester, POE-glycerin fatty acid having an average added mole number of propylene oxide of 1 to 18 and a glycerin polymerization degree of 1 to 3 One or two or more selected from ester, POE/POP-alkyl ether, POE-castor oil hydrogenated castor oil derivative, polyglycerin fatty acid ester, alkanolamide, nonionic surfactant having 8 or more HLB (C )water The cleansing cosmetic composition according to claim 1, wherein the compounding amount of the component (A) polyoxypropylene polyglyceryl ether is 1 to 20% by mass based on the total amount of the cleansing cosmetic composition.