JP2011162448A - O/w cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cosmetic that shows no stickiness and provides a moist feeling and a sustainable cool sensation. <P>SOLUTION: The O/W cosmetic comprises (A) xylitol, (B) ethanol, (C) liquid oil, (D) a polymer having a 10-30C hydrocarbon group and a carboxyl group within the molecule, and (E) water, provided that the mass ratio of components (A), (B) and (C) is ((A)+(B))/(C)=0.3-1.5. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an O / W cosmetic.

Cosmetics frequently used in the summer include UV cosmetics, hot flash suppression lotions, and the like. In particular, cosmetics used for the body often require a refreshing feeling and freshness.
In order to enhance the freshness and refreshing feeling, generally, a large amount of ethanol is blended, menthol is blended, and the like (Patent Document 1, Patent Document 2, etc.).
However, when ethanol is added in a large amount, there is a problem that the smell becomes strong and is not preferred. Also, in terms of refreshing feeling, when ethanol or menthol is added, the refreshing feeling immediately after application is increased, but there is a problem that the refreshing feeling is deteriorated immediately without sustainability.

  On the other hand, xylitol is a kind of sugar alcohol and is known as a natural substitute sweetener. Crystallized xylitol has a cool feeling and has a fast aftertaste, and is used for gums, candy, and the like (Patent Document 3, etc.). Moreover, it is also mix | blended with the skin external preparation for the purpose of a rough skin improvement and prevention effect (patent document 4, patent document 5).

Japanese Patent Laid-Open No. 10-182348 JP 2004-18411 A JP 2005-333946 A JP-A-11-322575 JP 2001-48769 A

  An object of the present invention is to provide a cosmetic that has no stickiness, has a fresh feel, and maintains a refreshing feeling.

  The present inventors have found that an O / W cosmetic material that solves the above-mentioned problems can be obtained by using xylitol, ethanol, and liquid oil in a specific ratio and further using a specific polymer in combination.

The present invention includes the following components (A), (B), (C), (D) and (E):
(A) xylitol,
(B) ethanol,
(C) liquid oil,
(D) a polymer having in the molecule a hydrocarbon group having 10 to 30 carbon atoms and a carboxyl group,
(E) O / which contains water and the mass ratio of component (A), (B) and (C) is ((A) + (B)) / (C) = 0.3-1.5. W cosmetics are provided.

  The O / W cosmetic of the present invention has no stickiness, a fresh feel and a refreshing feeling.

  The xylitol component (A) used in the present invention contains 0.1 to 10% by mass, particularly 0.3 to 7% by mass, and further 0.5 to 5% by mass in the total composition, and maintains a refreshing feeling. In addition, it is preferable because it can maintain a non-sticky feel.

  The ethanol component (B) used in the present invention contains 1 to 10% by mass, particularly 2 to 10% by mass, and more preferably 3 to 10% by mass in the total composition. It is preferable because it can be sustained.

The liquid oil of component (C) used in the present invention can be used without particular limitation as long as it is used in ordinary cosmetics and is liquid at 25 ° C. In particular, the viscosity is preferably 1000 mPa · s (25 ° C.) or less.
For example, vegetable oils such as jojoba oil and olive oil; animal oils such as liquid lanolin; linear or branched hydrocarbon oils such as liquid paraffin, light isoparaffin, squalane and squalene; neopentyl glycol dicaprate, isopropyl palmitate, paramethoxysilicate Ester oils such as fatty acid esters such as 2-ethylhexyl cinnamate and polyhydric alcohol fatty acid esters such as tetra-2-ethylhexanoic acid pentaerythritol; dimethylpolysiloxane, dimethylcyclopolysiloxane, methylphenylpolysiloxane, methylhydrogenpoly Examples thereof include silicone oils such as siloxane and higher alcohol-modified silicone oils; fluorine oils such as fluoropolyethers and perfluoroalkyl ether silicones.
Of these, oils having a viscosity at 25 ° C. of 100 mPa · s or less are preferable, and ester oils are particularly preferable. In particular, 2-ethylhexyl paramethoxycinnamate is preferred.

  One or more components (C) can be used, and 0.1 to 19% by mass, particularly 0.5 to 18% by mass, and further 1 to 17% by mass in the total composition provides a refreshing feeling. It is preferable because it can maintain a non-sticky feeling.

  Moreover, in this invention, the mass ratio of component (A), (B) and (C) is (A + B) / (C) = 0.3-1.5, Preferably it is 0.35-1.5. . Outside this range, the refreshing feeling cannot be sustained.

  The polymer of component (D) has a C10-30 hydrocarbon group and a carboxyl group in the molecule. The hydrocarbon group may be either a straight chain or a branched chain, and examples thereof include an alkyl group, an alkenyl group, an arylalkyl group, and an alkylaryl group. In particular, an alkyl group having 10 to 30 carbon atoms is preferable.

Examples of the polymer of component (D) include a polymer of acrylic acid and / or methacrylic acid having an alkyl group in the side chain.
More specifically, alkyl acrylate / alkyl methacrylate / polyoxyethylene (20) stearyl ether copolymer (INCI: ACRYLATES / STEARETH-20 METHACRYLATE COPOLYMER), alkyl acrylate / alkyl methacrylate / polyoxyethylene (25) ) Lauryl ether copolymer (INCI: ACRYLATES / LAURETH-25 METHACRYLATE COPOLYMER), alkyl acrylate, alkyl methacrylate, polyoxyethylene (25) behenyl ether copolymer (INCI: ACRYLATES / BEHENETH-25 METHACRYLATE COPOLYMER), acrylic Acid / alkyl methacrylate copolymer (INCI: ACRYLATES / C10-30 ALKYL ACRYLATE CROSSPOLYMER), acrylic acid / neodecanoic acid vinyl copolymer (INCI: ACRYLATES / VINYL NEODECANOATE CROSSPOLYMER), (Acrylates / Itaconic acid steareth-20) copolymer (INCI: ACRYLATES / STEARETH-20 ITACONATE COPOLYMER) (Rates / cetates-20 itaconate) copolymer (INCI: ACRYLATES / CETETH-20 ITACONATE COPOLYMER), (acrylates / aminoacrylate / C10-30 acrylic PEG-20 itaconic acid) copolymer (INCI: ACRYLATES / AMINOACRYLATES / C10-30ALKYL PEG-) 20 ITACONATE COPOLYMER).

These polymers include Aculine 88, Aculin 22, Aculin 28, Aculin 38 (above, Rohm and Haas Japan), Carbopol Ultrez 21, Carbopol Ultrez 20, Carbopol ETD2020, PEMULEN TR-1, Commercially available products such as PEMULEN TR-2 (above, Lubrizol Advanced Materials, Inc.), STRUCTURE 2001, STRUCTURE 3001, STRUCTURE PLUS, DERMACRYL 79 (above, NSC Japan) can be used.
Among these, acrylic acid / alkyl methacrylate copolymers and alkyl acrylate / alkyl methacrylate / polyoxyethylene (20) stearyl ether copolymers are preferred.

The polymer of component (D) is used after being neutralized. Examples of the counter ion used for neutralization include alkali metals such as sodium and potassium, ammonia, basic amino acids, organic amines such as monoethanolamine, diethanolamine, triethanolamine, and monoisopropanolamine. Of these, alkali metals are preferable from the viewpoint of stability, such as being difficult to color, and potassium is more preferable.
The pH of the composition after neutralization of the polymer is preferably 4.8-7.5, particularly 4.9-7.0, and more preferably 5.0-6.8 from the viewpoint of stability over time. More preferred.

  As the component (D), one or more kinds can be used, and 0.1 to 1% by mass, particularly 0.13 to 0.95% by mass, and further 0.18 to 0.93% by mass in the whole composition as a polymer. It is preferable to contain it because it can maintain the refreshing feeling and the freshness.

  Component (E) water is preferably contained in the total composition in an amount of 60 to 98.9% by mass, particularly 63 to 95% by mass, because the refreshing feeling can be maintained and the freshness can be maintained.

  Crystals of xylitol can give a refreshing feeling when dissolved in water, but when xylitol is dissolved in water as in the present invention, it gives a refreshing feeling even when applied to the skin. It is not possible. However, in the cosmetic of the present invention, the reason why the refreshing feeling is maintained is that the component (A) xylitol having a water retaining effect interacts, for example, hydrates, with the component (B) ethanol and the component (E) water. Thus, it is considered that there is an effect of delaying the volatilization of ethanol of the component (B). Moreover, the polymer of a component (D) forms the polymer structure in the cosmetics before apply | coating to skin, and is maintaining the emulsified state of the liquid oil of a component (C). However, when the cosmetic of the present invention is applied to the skin, the polymer structure in the cosmetic is broken and the emulsified state is broken. As a result, the liquid oil of component (C) separates and covers the surface of the applied cosmetic. And it will be controlled so that the volatilization of the ethanol of a component (B) may become further slow, and it is thought that the sustainability of a refreshing feeling becomes high. Moreover, the sustainability of a refreshing feeling improves also by including the polymer of a component (D).

The cosmetic of the present invention can further contain a nonionic surfactant. Nonionic surfactants include, for example, sorbitan fatty acid esters, glycerin fatty acid esters, polyglycerin fatty acid esters, propylene glycol fatty acid esters, polyethylene glycol fatty acid esters, sucrose fatty acid esters, polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters. , Polyoxyethylene sorbitol fatty acid ester, polyoxyethylene glycerin fatty acid ester, polyoxyethylene propylene glycol fatty acid ester, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, polyoxyethylene phytostanol ether, polyoxyethylene phytosterose ether , Polyoxyethylene cholestanol ether, polyoxyethylene cholesteryl ether, Polyoxyalkylene-modified organopolysiloxane, polyoxyalkylene-alkyl co-modified organopolysiloxanes, and the like.
These nonionic surfactants are preferably contained in the total composition in an amount of 0.1 to 1% by mass from the viewpoint of the emulsion stability of the cosmetic.

  The cosmetics of this invention can contain the other component used for normal cosmetics other than the said component. Examples include lower alcohols, moisturizers, water-soluble polymers, antioxidants, preservatives, chelating agents, whitening agents, UV absorbers, vitamins, various other medicinal ingredients, powders, fragrances, and coloring materials.

  In the O / W cosmetic of the present invention, for example, the polymer of component (D) is dispersed in (E) water, (A) xylitol is further added, and the mixture is stirred and mixed. It can manufacture by adding (B) ethanol and (C) liquid oil to this, stirring, and neutralizing to pH 4.8-7.5.

  The O / W cosmetic of the present invention has a viscosity at 25 ° C. of 0.5 to 25000 mPa · s, particularly 0.7 to 23000 mPa · s, and more preferably 1.0 to 20000 mPa · s. It is preferable in that it makes you feel fresh.

Examples 1-6, Comparative Examples 1-14
O / W cosmetics having the compositions shown in Tables 1 to 3 were produced, and the sustainability of the refreshing feeling, the non-stickiness and the freshness were evaluated. Also, the viscosity was measured. A result is combined with Tables 1-3 and shown.

(Production method)
The polymer of component (D) is dispersed in (E) water, heated to 80 ° C. and dissolved. Further, (A) xylitol is added and mixed with stirring. After cooling to room temperature, components (B) ethanol and (C) liquid oil were added to this solution and stirred, and adjusted to the desired pH with KOH.

(Evaluation methods)
(1) Persistence of coolness:
A specialist panelist applied 0.07 g of each cosmetic material to the back of the hand and performed sensory evaluation.
About the duration of the refreshing feeling, the time from immediately after application until the refreshing feeling disappeared was measured.

(2) No stickiness:
A specialist panelist applied 0.07 g of each cosmetic material to the back of the hand and performed sensory evaluation.
After spreading each cosmetic material in the hand, when it was tacky when it was pressed with the hand, or when it felt that the friction was high when the hand was moved horizontally, it was considered sticky. The evaluation was made in five stages, with 5 points when the stickiness was very low and 1 point when the stickiness was very high.

(3) Freshness:
A specialist panelist applied 0.07 g of each cosmetic material to the back of the hand and performed sensory evaluation.
When each cosmetic was spread in the hand, the case where it was felt that the cosmetic did not change like water or disappeared, or the case where it felt watery when the cosmetic was picked up was regarded as fresh. The evaluation was made in five stages, with 5 points when the freshness was very high and 1 point when the case was very low.

(4) Viscosity:
Measured using a BM viscometer (Toki Sangyo). When the viscosity is 20000 mPa · s or less, the rotor No. 4. Measurement was performed at a rotation speed of 30 rpm, 25 ° C. for 1 minute. When the viscosity exceeds 20000 mPa · s, the rotor no. 4. Measurement was carried out at 12 rpm, 25 ° C. and 1 minute.

Claims (3)

The following components (A), (B), (C), (D) and (E):
(A) xylitol,
(B) ethanol,
(C) liquid oil,
(D) a polymer having in the molecule a hydrocarbon group having 10 to 30 carbon atoms and a carboxyl group,
(E) O / which contains water and the mass ratio of component (A), (B) and (C) is ((A) + (B)) / (C) = 0.3-1.5. W cosmetics.   The O / W cosmetic according to claim 1, wherein the content of the component (D) is 0.1 to 1% by mass.   The O / W cosmetic according to claim 1 or 2, wherein the viscosity at 25 ° C is 0.5 to 25000 mPa · s.