JP7150438B2 - gel cosmetics - Google Patents

Description

TECHNICAL FIELD The present invention relates to gel cosmetics.

Gel-like cosmetics are widely used because of their moist feeling, good compatibility with the skin, smooth feeling of use, and the like.

Patent Document 1 discloses (A) a carboxyl group-containing thickening polymer compound, (B) tetrahydroxypropylethylenediamine, (C) a water-soluble alcohol, (D) a water-insoluble substance, and (E) a nonionic surfactant. and having a ratio D/E of component D to component E of 1 or more.

JP 2002-187814 A

However, gel-type cosmetics are characterized by the fact that they are easy to handle due to their moderate viscosity and that they have a unique feeling of use that spreads easily even though they do not easily drip when applied to the skin. It tends to be lost over time. Suppressing this change over time is important for enhancing the commercial value.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a gel-like cosmetic that compensates for these drawbacks, has little change in viscosity over time, and provides an excellent feeling of use when applied to the skin.

The gel cosmetic according to the present invention contains a carboxy group-containing anionic polymer compound and at least one of hydroxypropylmethylcellulose and xanthan gum.

By including at least one compound of hydroxypropylmethylcellulose and xanthan gum, the gel-like cosmetic composition has reduced change in viscosity over time without impairing the feeling of use.

The gel cosmetic may further contain a water-soluble polyhydric alcohol, and the water-soluble polyhydric alcohol may contain dipropylene glycol and glycerin. By containing dipropylene glycol and glycerin, the moisturizing property of the gel cosmetic can be made more sufficient.

The gel cosmetic may further contain a nonionic surfactant. By including a nonionic surfactant, the storage stability of the gel cosmetic is more excellent. The nonionic surfactant may contain at least one of polyoxyethylene sorbitan fatty acid ester and polyoxyethylene hydrogenated castor oil.

The gel cosmetics may further contain skin-beautifying ingredients. The skin-beautifying ingredient may contain one or more ingredients selected from the group consisting of tea extract, sake lees extract, citrus fruit extract, vegetable oil, and animal oil.

According to the present invention, it is possible to provide a gel-like cosmetic that suppresses changes in viscosity over time, is less prone to dripping when applied to the skin, and is easily spreadable and has a unique feeling of use.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail.

A gel cosmetic according to one embodiment of the present invention contains a carboxy group-containing anionic polymer and at least one of hydroxypropylmethylcellulose and xanthan gum. The gel cosmetic may contain, for example, a water-soluble polyhydric alcohol, a nonionic surfactant, a skin-beautifying ingredient, and the like.

As used herein, the term "gel-like cosmetic" refers to a cosmetic in a non-fluid state, and includes, for example, a cosmetic having a viscosity of 1500 to 7000 mPa·s at 25° C. measured by a Brookfield viscometer.

The carboxy group-containing anionic polymer (hereinafter also simply referred to as component (A)) is obtained by neutralizing at least a portion of the carboxy groups of a polymer compound containing carboxy groups with an alkaline substance. Since it increases the viscosity of water-based cosmetics, it is also called a carboxy group-containing thickening polymer compound. As component (A), a water-soluble thickening agent can be used, and examples thereof include sodium polyacrylate. Component (A) is also called carboxyvinyl polymer and is commercially available under trade names such as "Carbopol" and "Hibis Wako".

The content of component (A) is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, and still more preferably 0.17% by mass or more, based on the total amount of the gel cosmetic. is. When the content of the component (A) is 0.05% by mass or more, it is possible to impart sufficient viscosity to the gel-like cosmetic, and to obtain a better feeling during use. The content of component (A) may be 2% by mass or less, 0.5% by mass or less, or 0.3% by mass or less based on the total amount of the gel cosmetic. .

At least one compound of hydroxypropylmethylcellulose and xanthan gum (hereinafter also simply referred to as component (B)) may be used in combination, but hydroxypropylmethylcellulose is preferably used. Since the gel cosmetic contains the component (B), it is possible to reduce changes in the viscosity of the gel cosmetic over time. In the gel cosmetic, the viscosity of the gel cosmetic is adjusted by blending a semisynthetic polymer, a natural polymer, or the like. However, in the gel cosmetic according to the present embodiment, by selecting at least one of hydroxypropylmethylcellulose and xanthan gum among semi-synthetic polymers and natural polymer compounds, surprisingly, the use of Viscosity changes over time can be reduced without impairing the feel.

The content of component (B) is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, and still more preferably 0.08% by mass or more, based on the total amount of the gel cosmetic. is. By setting the content of the component (B) to 0.01% by mass or more, it is possible to sufficiently suppress changes in the viscosity of the gel cosmetic over time. The content of component (B) is preferably 0.5% by mass or less, more preferably 0.3% by mass or less, and still more preferably 0.2% by mass or less, based on the total amount of the gel cosmetic. is. By setting the content of the component (B) to 0.5% by mass or less, the gel-like cosmetic can have an appropriate viscosity, and the feeling of use can be further improved.

Examples of water-soluble polyhydric alcohols (hereinafter simply referred to as component (C)) include ethylene glycol, propylene glycol, 1,3-butylene glycol, dipropylene glycol, glycerin, sorbitol, mannitol, and polyethylene glycol. be able to.

The content of component (C) is preferably 5% by mass or more, more preferably 10% by mass or more, and still more preferably 15% by mass or more, based on the total amount of the gel cosmetic. When the content of the component (C) is 5% by mass or more, it is possible to impart an appropriate moisturizing property to the gel-like cosmetic, resulting in a better feel during use. The content of component (C) may be 40% by mass or less, or may be 25% by mass or less, based on the total amount of the gel cosmetic.

Water-soluble polyhydric alcohols preferably include dipropylene glycol and glycerin. A gel cosmetic containing dipropylene glycol and glycerin in combination provides better moisturizing properties.

When the component (C) contains dipropylene glycol and glycerin, the mass ratio of the glycerin content to the dipropylene glycol content (glycerin content/dipropylene glycol content) is preferably 0.25 to 3, more preferably 0.5 to 2, and still more preferably 0.75 to 1.5. By adjusting the mass ratio of the content of glycerin to the content of dipropylene glycol to fall within the above range, the moisturizing property of the gel cosmetic can be made more sufficient.

Examples of nonionic surfactants (hereinafter simply referred to as component (D)) include polyoxyethylene sorbitan fatty acid ester, polyoxyethylene hydrogenated castor oil, glycerin fatty acid ester, polyglycerin fatty acid ester, propylene glycol fatty acid ester, Pentaerythritol fatty acid ester, polyoxyethylene sorbitol fatty acid ester, polyoxyethylene glycerin fatty acid ester, polyethylene glycol fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene phytosterol, polyoxyethylene phytostanol, polyoxyethylene polyoxypropylene alkyl ether, Polyoxyethylene alkylphenyl ether, polyoxyethylene castor oil, polyoxyethylene lanolin, polyoxyethylene lanolin alcohol, polyoxyethylene beeswax derivative, polyoxyethylene alkylamine, polyoxyethylene fatty acid amide, polyoxyethylene alkylphenyl formaldehyde condensate , single chain length polyoxyethylene alkyl ethers, alkyl glucosides, and polyoxyalkylene alkyl glucosides. Among these, the nonionic surfactant preferably includes at least one of polyoxyethylene sorbitan fatty acid ester and polyoxyethylene hydrogenated castor oil.

Component (D) may contain a surfactant with an HLB value of 8-17, and may contain a surfactant with an HLB value of 10-15. By including a surfactant having an HLB value of 8 to 17 in the component (D), the stickiness of the gel cosmetic can be further suppressed. Here, the HLB value is a value that indicates the balance between hydrophilicity and lipophilicity of a compound, and the closer the HLB is to zero, the higher the lipophilicity. The HLB value of a surfactant can be obtained by a calculation method or an emulsification method (actual measurement method).

The content of component (D) is preferably 0.05 to 10% by mass, more preferably 0.1 to 5% by mass, and still more preferably 0.5 to 10% by mass, based on the total amount of the gel cosmetic. It is 1.5% by mass. By setting the content of the component (D) to 0.05% by mass or more, the storage stability of the gel cosmetic can be further improved. Moreover, when the content of the component (D) is 10% by mass or less, the stickiness of the gel cosmetic is further suppressed.

The skin-beautifying component (hereinafter also simply referred to as component (E)) preferably contains one or more components selected from the group consisting of tea extract, sake lees extract, citrus extract, vegetable oil, and animal oil. Here, the extract means an extract obtained by extracting mainly water-soluble components from raw materials such as tea, citrus fruits, and sake lees with water, alcohols, and the like.

Examples of the tea extract include karatsu tea extract, ureshino tea extract, and Shizuoka tea extract. Examples of the sake lees extract include junmai daiginjo sake lees extract, daiginjo sake lees extract, junmai ginjo sake lees extract, and ginjo sake lees extract. Examples of citrus extracts include Genkou extract, Sudachi extract, Satsuma mandarin extract, and the like. Vegetable oils include camellia oil, jojoba oil, rose oil, and the like. Animal oils include emu oil, horse oil, mink oil, and the like.

The content of component (E) is preferably 0.01 to 10% by mass, more preferably 0.05 to 7% by mass, and still more preferably 0.02 to 10% by mass, based on the total amount of the gel cosmetic. 5% by mass. By setting the content of the component (E) to 0.01% by mass or more, the gel-like cosmetic can sufficiently have the effects derived from the skin-beautifying ingredients.

The gel-like cosmetic according to the present embodiment may also contain a fragrance (hereinafter also simply referred to as component (F)). Examples of flavoring agents include, in addition to tea flavorings, sake lees flavorings, and citrus fruit flavorings, flavorings reminiscent of plants and flavorings resembling animals. Perfume can be used that corresponds to the component used as the skin-beautifying component. For example, when a tea extract is used as a skin-beautifying component, a tea fragrance can be used as the fragrance.

The tea flavor means a flavor having a matcha-like floral scent, but is not limited to those using matcha as a raw material. The sake lees flavor means a flavor having a sake-like floral scent. The citrus fragrance means a fragrance having a sudachi-like citrus scent, but is not limited to those using sudachi as a raw material. A fragrance reminiscent of a plant means a fragrance having a floral scent reminiscent of a plant, in addition to the fragrances described above, but is not limited to those made from plants. The animal-associated fragrance means a fragrance having an animal-associated fragrance, but is not limited to those made from animals.

By containing 0.05% to 5% by mass of skin-beautifying ingredients and 0.001% to 0.5% by mass of perfume based on the total amount of the gel cosmetic, it is possible to produce a pleasant fragrance. The combination of skin-beautifying ingredients and fragrances is as follows. The skin-beautifying component is a vegetable oil and the fragrance is a fragrance reminiscent of a plant, or the skin-beautifying component is an animal oil and the fragrance is a fragrance reminiscent of an animal. The combination of both components in the combination of the skin-beautifying component and the fragrance is more preferably 0.05% to 0.2% by mass of tea extract and 0.01% to 0.1% by mass of tea fragrance, 0.05% to 0.2% by weight of sake lees extract and 0.01% to 0.1% by weight of sake lees flavor, or 0.05% to 0.2% by weight of citrus fruit extract and 0 .05% to 0.5% by weight of citrus flavor, or 1.5% to 5% by weight of vegetable oil and 0.001% to 0.1% by weight of plant reminiscent flavor or 0.2% to 1% by weight of animal oil and 0.001% to 0.05% by weight of an animal-reminiscent fragrance.

In addition to the components (A) to (F), the gel cosmetic according to the present embodiment may contain other components, if necessary, within a range that does not impair the effects of the present invention. Other components include, for example, oily components (excluding the vegetable oils and animal oils described above), powders, preservatives, antioxidants, ultraviolet absorbers, pH adjusters, and the like.

Examples of oily components include hydrocarbon oils such as liquid paraffin, squalane, vaseline, and volatile isoparaffin; fatty acids such as oleic acid and stearic acid; ester oils such as cetyl octanoate, isopropyl myristate, and pentaerythritol ester; Examples include siloxane, silicone oils such as methylphenylpolysiloxane, and higher alcohols.

As the powder component, those commonly used in cosmetics can be used. Examples of powder components include coloring pigments and extender powders.

The content of other components is preferably 0 to 20% by mass, more preferably 0.1 to 10% by mass, and still more preferably 0.1 to 5% by mass, based on the total amount of the gel cosmetic. is.

Gel cosmetics may contain water. The water may be purified water, tap water, or the like, but is preferably purified water. Purified water includes, for example, ion-exchanged water, distilled water, and ultrafiltered water.

The water content is preferably 20 to 90% by mass, more preferably 40 to 85% by mass, still more preferably 50 to 80% by mass, based on the total amount of the gel cosmetic. When the water content is 20% by mass or more, the viscosity of the gel-like cosmetic does not become too high, and the feeling of use such as ease of application to the skin is excellent, and stickiness is less likely to occur after application. Moreover, when the water content is 90% by mass or less, it is possible to further suppress the occurrence of dripping or the like before the composition is applied to the skin and spreads.

The gel-like cosmetic according to the present embodiment can be prepared, for example, by weighing the components described above and mixing them with a stirrer or the like. For example, a gel-like cosmetic may be prepared by first mixing water-soluble components to form an aqueous phase, and then sequentially adding and mixing lipophilic components. After mixing to form an oil phase, a hydrophilic component may be sequentially added and mixed to prepare a gel cosmetic.

The gel cosmetics according to the present embodiment are suitable as cosmetics such as colognes, lotions, and deodorants, for example.

EXAMPLES The present invention will be specifically described below with reference to Examples. However, the present invention is not limited only to the following examples.

(Example 1)
A gel cosmetic was obtained by uniformly mixing the components shown in Table 1 in the formulation amounts shown in Table 1.

<Temporal change in viscosity>
The viscosity of the gel cosmetic obtained above was measured using a Brookfield viscometer (“RV DV-II+” manufactured by Brookfield) under conditions of 25° C. and 5 rpm. In the measurement, the gel-like cosmetic was placed in a chamber of a Brookfield viscometer and allowed to stand for 5 minutes before starting the measurement. The measurement was carried out at the time of completion of the production of the gel cosmetic, one week after the completion of the production, and one month after the completion of the production. The change in the viscosity of the gel-like cosmetic over time was determined by measuring the difference between the viscosity at the time when the production of the gel-like cosmetic was completed and the viscosity one month after the production was completed, and judged according to the following criteria. Table 1 shows the results.
◎: Viscosity difference is less than 500 ○: Viscosity difference is 500 or more and less than 700 △: Viscosity difference is 700 or more and less than 1000 ×: Viscosity difference is 1000 or more

<Phase separation>
8 g of the gel-like cosmetic obtained above was placed in a 10 mL Spitz tube, and two tubes were prepared. One was stored at 60°C for 1 month, and the other was stored at 50°C for 2 months. were stored under the conditions of The state of the gel-like cosmetic in the Spitz tube after storage was visually observed and evaluated according to the following criteria. Table 1 shows the results.
◯: No phase separation was observed in the gel cosmetic in any spitz tube.
x: Phase separation was observed in the gel cosmetic in at least one of the Spitz tubes.

<Sensory test>
A sensory test was conducted on the resulting gel-like cosmetic by a panel of five randomly selected skilled panelists. A sensory test was conducted from the viewpoint of the feeling of use and the strength of the fragrance.
[Feeling of use]
The gel cosmetics obtained above were stored at room temperature for one week after production. 50 μL of this gel-like cosmetic was sampled, and whether or not the gel-like cosmetic placed on the back of the hand did not flow and spread on the skin and did not drip easily was evaluated on a scale of 5.
5 points: Very hard to drip,
4 points: less likely to drip,
3 points: Neither
2 points: Easy to drip,
1 point: Very easy to drip.
The five-level evaluation results were averaged by five panelists. Then, the results of sensory evaluation regarding feeling in use were judged according to the following criteria. Table 1 shows the results.
○: 4.5 to 5 or less △: 4 to 4.5 or less ×: 4 or less [fragrance intensity]
50 μL of the gel-like cosmetic obtained above was sampled, placed on the back of the hand, and the fragrance was evaluated. Evaluation of fragrance was performed twice immediately after production of the gel cosmetic and after storage at 60° C. for 2 weeks, and the presence or absence of change in fragrance was evaluated according to the following criteria.
3 points: The intensity of fragrance of the gel cosmetic after storage was comparable to that immediately after production.
2 points: The strength of the fragrance of the gel cosmetic after storage was weaker than immediately after production.
1 point: The strength of fragrance of the gel cosmetic after storage was considerably weaker than that immediately after production.
The evaluation results of the above 3 stages were averaged by 5 panelists. Then, the results of sensory evaluation regarding the strength of fragrance were judged according to the following criteria. Table 1 shows the results.
○: more than 2.5 ×: 2.5 or less

(Examples 2-6)
A gel cosmetic was obtained in the same manner as in Example 1, except that the components and content ratios shown in Table 1 were changed. In Examples 2 to 6, the same evaluation as in Example 1 was performed for each of the obtained gel cosmetics. Table 1 shows the results.

(Comparative Examples 1 to 6)
A gel cosmetic was obtained in the same manner as in Example 1, except that the components and contents shown in Table 2 were changed. In Comparative Examples 1 to 6, evaluations were performed in the same manner as in Example 1 for each of the obtained gel cosmetics. Table 2 shows the results.

(Examples 7-10)
A gel cosmetic was obtained in the same manner as in Example 1, except that the components and content ratios shown in Table 3 were changed. In Examples 7 to 10, the same evaluation as in Example 1 was performed for each of the obtained gel cosmetics. Table 3 shows the results.

(Comparative Examples 7-10)
A gel cosmetic was obtained in the same manner as in Example 1, except that the components and contents shown in Table 4 were changed. In Comparative Examples 7 to 10, evaluations were made in the same manner as in Example 1 for each of the obtained gel cosmetics. Table 4 shows the results.

From the above results, the gel-like cosmetic of the present invention has a unique feeling of use that easily spreads and spreads despite the fact that it does not easily drip when applied to the skin, and does not impair this feeling of use. , was confirmed to be an excellent cosmetic in which the change in viscosity over time was suppressed.

Claims (3)

containing a carboxy group-containing anionic polymer, hydroxypropyl methylcellulose, a water-soluble polyhydric alcohol, and a nonionic surfactant ,
The carboxyl group-containing anionic polymer is a carboxyvinyl polymer,
The water-soluble polyhydric alcohol contains dipropylene glycol and glycerin,
The nonionic surfactant contains at least one surfactant of polyoxyethylene sorbitan fatty acid ester and polyoxyethylene hydrogenated castor oil ,
The content of the carboxy group-containing anionic polymer is 0.17% by mass or more and 0.3% by mass or less,
The content of the hydroxypropylmethylcellulose is 0.08% by mass or more and 0.2% by mass,
The content of the water-soluble polyhydric alcohol is 15% by mass or more and 25% by mass or less,
The content of the nonionic surfactant is 0.5 to 1.5% by mass,
Gel cosmetics (excluding gel compositions for external use characterized by containing vinyl polymer, cellulose polymer, liquid oil and fatty acid dextrin). The gel cosmetic according to claim 1 , further comprising a skin-beautifying ingredient. 3. The gel-like cosmetic according to claim 2 , wherein the skin-beautifying ingredient contains one or more ingredients selected from the group consisting of tea extract, sake lees extract, citrus fruit extract, vegetable oil, and animal oil.