JP7217520B2 - Skin cosmetics - Google Patents

Description

TECHNICAL FIELD The present invention relates to a skin cosmetic that provides freshness, stickiness, smoothness, and moistness after application and does not cause tightness during application.

In the skin care market in recent years, a large number of cosmetics claiming various purposes and effects have been put on the market. These are influenced by the season, fashion, etc., and change to content that stimulates the consumer's desire to purchase. Among them, there is a certain need throughout the year, and one of the important feeling of use that is emphasized is moist feeling.

There are many techniques for improving the moist feeling of cosmetics, and although it is possible to improve the moist feeling relatively easily, there is a drawback that the skin feels uncomfortable during application. The more the moist feeling is improved, the stronger the taut feeling is at the same time. Therefore, there is a strong demand for a cosmetic that simultaneously imparts a moist feeling and no taut feeling. In addition, complex comfort such as freshness, stickiness, and smoothness are also greatly required for these cosmetics. The sticking feeling in the present invention means the familiarity between the two skins when the cosmetic-applied skin and the non-coated skin are brought into contact with each other as if the two stick to each other.

Ingredients that impart a moist feeling are generally exemplified by polyhydric alcohols such as 1,3-butylene glycol, glycerin, and polyethylene glycol. If the content of these substances is increased, a sufficient moist feeling can be obtained after application, but the skin becomes taut during application, and discomfort continues until the skin dries. On the other hand, if they are prepared in a small amount, it becomes difficult to obtain a moist feeling, resulting in a cosmetic that does not meet consumer needs. As described above, it was difficult to fully satisfy both in the prior art.

Patent Document 1 discloses an oil-in-water emulsified cosmetic that contains a large amount of a water-soluble moisturizing agent such as trimethylglycine and a liquid oil such as squalane and imparts a soft and firm feeling to the skin without stickiness.

Patent Literature 2 discloses a skin cosmetic that contains an electrolyte such as trimethylglycine and an alkyl acrylic acid/methacrylate copolymer and has good storage stability and good feeling during application.

JP 2015-59114 A JP 2011-1297 A

Although the technique described in Patent Document 1 can provide a strong moist feeling, stickiness occurs due to the inclusion of the gum-based water-soluble polymer and the emulsifier in the same system. In addition, no consideration has been given to the lack of tension during application.

Although the technique described in Patent Document 2 can provide a strong moist feeling, stickiness occurs due to xanthan gum and monosaccharides contained in the same system. In addition, no consideration has been given to the lack of tension during application.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a skin cosmetic that provides freshness, stickiness, smoothness, and moistness after application, and that does not cause tension during application.

As a result of intensive studies to solve the above problems, the present inventors have found that one or more selected from component (A) an alkyl acrylate/methacrylate copolymer, component (B) methyl gluceth-20 and methyl gluceth-10, The present invention was accomplished by providing a skin cosmetic containing component (C) squalane and component (D) trimethylglycine.

To provide a skin cosmetic that gives freshness, sticky feeling, smooth feeling and moist feeling after application, and does not cause tightness during application.

The present invention will be described in detail below. In addition, all the units which show content are the mass % unless otherwise specified.

The present invention contains the following components (A) to (D), and the content ratio (C)/(D) of the mass of the component (C) and the component (D) is 0.1 to 10. It is characterized by skin cosmetics.
Component (A) Alkyl acrylate/methacrylate copolymer Component (B) One or more selected from methylgluceth-20 and methylgluceth-10 Component (C) Squalane Component (D) Trimethylglycine

The skin cosmetic composition according to the present invention contains component (A) an alkyl acrylic acid/methacrylate copolymer (hereinafter referred to as component (A)).

The content of component (A) used in the present invention is not particularly limited, but is preferably 0.1 to 1% from the viewpoint of freshness after application. If the content of component (A) is less than 0.1%, it may be difficult to obtain stability over time.

The skin cosmetic composition according to the present invention contains component (B) one or more selected from methylgluceth-20 and methylgluceth-10 (hereinafter referred to as component (B)).

Component (B) used in the present invention includes methylgluceth-20 and methylgluceth-10. Among them, methyl gluceth-20 is preferable from the viewpoint of sticking feeling after application. One or more of these may be selected and contained.

The content of component (B) used in the present invention is not particularly limited, but is preferably 0.5 to 10% from the viewpoint of stickiness after application. If the content of component (B) is less than 0.5%, it may be difficult to obtain a sticky feeling, and if it exceeds 10%, a sticky feeling may be obtained.

The skin cosmetic composition according to the present invention contains component (C) squalane (hereinafter referred to as component (C)).

The content of component (C) used in the present invention is preferably 0.2 to 20% or more, more preferably 0.4 to 20% or more, and further preferably 2 to 20% or more, from the viewpoint of smooth feeling after application. preferable. If the content of the component (C) is less than 0.2%, it is not preferable because the smooth feeling cannot be obtained and the skin feels squeaky. Moreover, even if the content of the component (C) exceeds 20%, it is unlikely that the silky feeling will become stronger.

The skin cosmetic composition according to the present invention contains component (D) trimethylglycine (hereinafter referred to as component (D)).

The content of component (D) used in the present invention is preferably 0.2 to 20% or more, more preferably 0.4 to 20% or more, and further preferably 1 to 20% or more, from the viewpoint of moist feeling after application. preferable. If the content of component (D) is less than 0.2%, moist feeling cannot be obtained, which is not preferable. Also, even if the content of component (D) exceeds 20%, it is unlikely that the moist feeling will become stronger.

The content ratio (C)/(D) of the component (C) and the component (D) used in the present invention is preferably 0.1 to 10, more preferably 0.2 to 8, from the viewpoint of lack of tension during application. 1 to 4 are more preferred. When the content ratio (C)/(D) is less than 0.1, stickiness occurs during application and the skin becomes taut, and when it exceeds 10, creaking occurs during application and the skin becomes taut.

Although the dosage form of the skin cosmetic according to the present invention is not particularly limited, it may be liquid, gel, oil-in-water emulsion, or the like. When the dosage form of the skin cosmetic according to the present invention is a gel or an oil-in-water emulsion, the viscosity is not particularly limited, but is preferably 50,000 mPa·s or more. If the viscosity is less than 50,000 mPa·s, the stability over time may be impaired.

The viscosity in the present invention is measured by filling 120 g of the cosmetic prepared by a conventional method into a sample bottle (Food 140: manufactured by Daiichi Glass Co., Ltd.) and allowing it to stand at 25 ° C. for 24 hours. (model: digital viscometer TVB-10M, manufactured by Toki Sangyo Co., Ltd.), and measured after rotating at 25° C. and 6 rpm for 1 minute using an M4 rotor.

The skin cosmetic composition according to the present invention may also contain water, an oil, an anionic surfactant, a cationic surfactant, an amphoteric surfactant, and a nonionic surfactant as long as the effects of the present invention are exhibited. , thickeners, solvents, moisturizers, vitamins, preservatives, antioxidants, ultraviolet absorbers, ultraviolet scattering agents, chelating agents, extracts, fermentation liquids, wetting agents, coloring agents, fragrances, etc. , and one or more of these may be contained.

EXAMPLES The present invention will be described in more detail below with reference to examples, but these are not intended to limit the present invention in any way.

In the evaluation tests shown in Tables 1 to 4, skin cosmetics were prepared by a conventional method while changing the ingredients and contents.

(Evaluation method)
Ten panelists used the skin cosmetics and performed a sensory evaluation for each item. Panelists evaluate each item on a 5-point scale of 5 points (very good), 4 points (better), 3 points (good), 2 points (bad), and 1 point (very bad), and the average score of all was calculated, and then determined according to the following criteria.

(Criteria for average score)
4.0 points or more: 5
3.5 points or more and less than 4.0 points: 4
3.0 points or more and less than 3.5 points: 3
2.0 points or more and less than 3.0 points: 2
Less than 2.0 points: 1

(First evaluation test)
In the first evaluation test, skin cosmetics were evaluated with respect to the content of component (A). Table 1 shows the components of the skin cosmetics, their contents, and the evaluation results.

From Examples 1 to 4 shown in Table 1, good results were obtained in terms of freshness, stickiness, dryness, moistness and lack of tightness.

(Second evaluation test)
In the second evaluation test, skin cosmetics were evaluated with respect to the type and content of component (B). Table 2 shows the components of the skin cosmetics, their contents, and the evaluation results.

From Examples 5 to 9 shown in Table 2, good results were obtained with respect to freshness, stickiness, smoothness, moistness and lack of tightness.

(Third evaluation test)
In the third evaluation test, skin cosmetics were evaluated with respect to the type and content of component (C) and the content ratio (C)/(D) of component (C) and component (D). Table 3 shows the components of the skin cosmetics, their contents, and the evaluation results.

From Examples 10 to 17 shown in Table 3, good results were obtained with respect to freshness, stickiness, smoothness, moistness and lack of tightness.

(Fourth evaluation test)
In the fourth evaluation test, skin cosmetics were evaluated with respect to the type and content of component (D) and the content ratio (C)/(D) of component (C) and component (D). Table 4 shows the components of the skin cosmetics, their contents, and the evaluation results.

From Examples 18 to 24 shown in Table 4, good results were obtained in terms of freshness, stickiness, dryness, moistness and lack of tension.

Example 25 of the skin cosmetic is described below.

The skin cosmetic obtained in Example 25 gave good results in terms of freshness, stickiness, smoothness, moistness and lack of tightness.

Example 25
Component content (%)
(A) Acrylic acid/alkyl methacrylate copolymer 0.40
(B) Methylgluceth-20 2.00
(C) Squalane 4.00
(D) Trimethylglycine 2.00
EDTA-2Na 0.05
Citric acid 0.01
Glycerin 4.00
Carbomer 0.20
1,3-butylene glycol 10.00
Xanthan gum 0.10
Hydroxyethyl cellulose 0.40
Methylparaben 0.30
Dimethicone 2.00
Ethylhexyl palmitate 2.00
Arginine 0.60
Hamamelis leaf extract 0.10
Pyridoxine cyclic phosphate 0.10
Succinyl atelocollagen 0.10
Ascorbyl glucoside 0.10
Ectoine 0.10
Yeast extract 0.10
Total water residue 100.00

INDUSTRIAL APPLICABILITY The present invention can provide a skin cosmetic that has freshness, stickiness, smoothness, and moistness after application, and does not cause tightness during application.

Claims (1)

The following components (A) to (D) are contained, the content of component (D) is 1 to 2% by mass, and the content ratio of the mass of component (C) to component (D) (C) / ( A skin cosmetic, characterized in that D) is from 1 to 4 .
Component (A) Alkyl acrylic acid/methacrylate copolymer Component (B) Methyl gluceth-20
Component (C) Squalane Component (D) Trimethylglycine