JP2007246442A - Cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cosmetic having excellent humectant effects over a long period while softening skin or hair. <P>SOLUTION: The cosmetic is obtained by formulating (a) an ester of a polyhydric alcohol of a specific chemical structure with an 8-30C straight-chain or branched chain fatty acid with (b) a 14-30C higher alcohol, (c) a hydrophilic surfactant and (d) water. In the ester, the number of un-reacted hydroxy groups contained in one molecule of the ester is 1 when the number of the hydroxy groups contained in one molecule of the polyhydric alcohol constituting the ester before reaction is 2 and the average degree of esterification is ≥51 to <95% when the number of the hydroxy groups contained in one molecule of the polyhydric alcohol before reaction is ≥3. The molar ratio [(b)/(c)] of the (b) to the (c) is ≥2 to ≤7.5. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to cosmetics such as skin care, makeup, and hair care products that provide an excellent feeling of use when applied to skin, lips, hair, and the like. More specifically, the present invention relates to a cosmetic material that is excellent in permeation, softening effect, moisture feeling with time, and the like, and has excellent stability.

Protecting skin and hair from drying and imparting moisture and softening effects are extremely important matters as effects brought about by cosmetics, and are generally brought about by hydrophilic components such as water and moisturizing agents. However, since these are easily removed by physical changes such as evaporation and diffusion and washing after being applied to the skin, it is difficult to make them feel as long-term or long-term effects. Moreover, although a large amount of a moisturizing agent increases the moisturizing effect, it is not preferable for the touch because it is sticky.
In order to increase the permeability of these components, the addition of an amphiphile is effective because the skin has hydrophobic properties. From the viewpoint of safety to the skin, the amount added is limited and it is difficult to obtain a high effect.
It is also known to add a water-holding oil to give moisture and a softening effect (see Patent Documents 1 to 4).

JP 11-246354 A JP 2002-255738 A JP 2003-286126 A JP 2004-143068 A

However, simply having a high water-holding property releases moisture with the passage of time after application, resulting in poor moisture retention, and is insufficient for obtaining a long-term moisture and softening effect. In addition, softening the skin is a major role for cosmetics, but such effects are not always satisfactory.
Then, the objective of this invention is providing the cosmetics which are excellent in the moisturizing effect for a long time, making skin and hair soft.

  As a result of intensive studies based on the above problems, the present inventors have aimed at cosmetics containing at least one ester containing at least one hydroxyl group, a higher alcohol, a hydrophilic surfactant of HLB7 or higher, and water. As a result, the present invention was found to be excellent.

  The present invention relates to (a) the following chemical formula (1):

(In the formula, R1 to R3 are hydrogen atoms or hydroxyl groups, at least one is a hydroxyl group, n1, n2 is 0 or 1, and n3 is an integer of 1 to 10.)
A reaction in which the number of unreacted hydroxyl groups contained in one molecule of the ester is an ester of a polyhydric alcohol represented by the formula (1) and a linear or branched fatty acid having 8 to 30 carbon atoms. When the number of hydroxyl groups contained in one molecule of the previous polyhydric alcohol is 2, the average degree of esterification is 51% or more when the number of hydroxyl groups contained in one molecule of the polyhydric alcohol before the reaction is 3 or more. An ester that is less than 95% (b) a higher alcohol having 14 to 30 carbon atoms (c) a hydrophilic surfactant (d) water, and a molar ratio of (b) to (c) ((b) / (c )) Is 2 or more and 7.5 or less.

  ADVANTAGE OF THE INVENTION According to this invention, when apply | coating to skin, for example, a penetration feeling is obtained immediately after application | coating, skin can become soft, and the cosmetics which can feel moisture even if the time after application | coating passes can be provided. In addition, it is possible to provide a cosmetic that can keep lips from turning and drying for a long time. In addition, hair cosmetics can be provided that imparts suppleness to hair and provides excellent hair styling properties.

The best mode of the present invention will be described below.
As the ester (a) used in the present invention, the polyhydric alcohol represented by the general formula (1) is propylene glycol, dipropylene glycol, trimethylolpropane, erythritol, glycerin, diglycerin, tetraglycerin, hexaglycerin. It is preferable that it is 1 type, or 2 or more types chosen from decaglycerin.

  Particularly suitable as the ester (a) used in the present invention is propylene glycol monoalkyl ester, dipropylene glycol monoalkyl ester, trimethylolpropane dialkyl ester, erythritol trialkyl ester, glycerin dialkyl ester, diglycerin trialkyl ester. And tetraglycerin pentaalkyl ester. The ester (a) used in the present invention is an oil that exhibits high water retention under low humidity conditions. That is, an oil component that has a moisture content of 0.1 mg / g or more when left for 24 hours in low humidity (20%) after standing for 24 hours in high humidity (humidity 90%). It is.

  As the oil in the present invention, in addition to the ester (a), another oil can be blended. Examples of such oils include oils generally used in cosmetics. Specifically, hydrocarbons having a melting point of less than 80 ° C. such as liquid paraffin, squalane, petrolatum, polyisobutylene, polybutene, microcrystalline wax, molasses, montan wax, olive oil, castor oil, jojoba oil, mink oil, macadamian Fats and oils such as nut oil, cetyl isooctanoate, isopropyl myristate, isopropyl palmitate, octyldodecyl myristate, glyceryl trioctanoate, polyglyceryl diisostearate, diglyceryl triisostearate, glyceryl tribehenate, pentaerythritol rosinate Esters such as neopentyl glycol dioctanoate, stearic acid, lauric acid, myristic acid, behenic acid, isostearic acid, oleic acid, 12-hydroxystearic acid, etc. Fatty acids, stearyl alcohol, cetyl alcohol, lauryl alcohol, oleyl alcohol, isostearyl alcohol, higher alcohols such as behenyl alcohol, fluorine oils such as perfluorodecane, perfluorooctane, perfluoropolyether, lanolin fatty acid isopropyl, lanolin Lanolin derivatives such as alcohol, dextrin fatty acid esters, sucrose fatty acid esters, starch fatty acid esters and other oily gelling agents, cyclic silicones such as decamethylcyclopentasiloxane and octamethylcyclotetrasiloxane, dimethylpolysiloxane, methylphenylpolysiloxane, alkoxy Examples include silicone oils such as modified silicones and alkyl-modified silicones, and these may be used alone or in combination of two or more. Kill.

  In this invention, it is desirable for ester (a) to occupy 10-100 mass% of the total amount of oil containing ester (a). When the amount is less than 10% by mass, the moisture and softening effect of the skin becomes extremely small.

  Moreover, content of the oil component in the cosmetics of this invention is 0.2-50 mass% in cosmetics whole quantity, More preferably, it is 0.5-40 mass%.

  Specific examples of the higher alcohol (b) having 14 to 30 carbon atoms used in the present invention include linear aliphatic alcohols such as myristyl alcohol, cetyl alcohol, cetostearyl alcohol, stearyl alcohol, aralkyl alcohol, and behenyl alcohol. And mixtures thereof, those having a branched chain such as hexyl decanol, isostearyl alcohol, octyldodecanol, decyl tetradecanol, those having a double bond such as oleyl alcohol, jojoba alcohol, rapeseed oil alcohol, lanolin Examples thereof include aliphatic alcohol mixtures obtained by reducing natural fats and oils such as alcohol.

  The compounding quantity of a higher alcohol (b) is 0.05-8 mass% in cosmetics whole quantity, More preferably, it is 0.08-6 mass%.

  The hydrophilic surfactant (c) used in the present invention refers to a surfactant having an HLB of 7 or more. Examples of the hydrophilic surfactant (c) include polyoxyethylene alkyl ether, polyoxyethylene / polyoxypropylene alkyl ether, sorbitan fatty acid ester, glycerin monoalkyl ester, polyethylene glycol alkyl ester, polyoxyethylene hydrogenated castor oil, poly Oxyethylene castor oil, polyoxyethylene glycerin alkyl ester, polyoxyethylene alkyl ether alkyl ester, polyoxyethylene sorbitan alkyl ester, polyglycerin alkyl ester, polyoxyethylene alkyl ether phosphoric acid, pyroglutamic acid ester, dimethicone copolyol, alkaloyl Alkyl taurine salt, alkaloyl glutamate, alkaloyl lactate, fatty acid soap, alkyl chloride Methyl ammonium, 2-alkyl -N- carboxymethyl -N- hydroxyethyl imidazolinium betaine, polyoxyethylene alkyl ether sulfates, alkylamide amine.

  The molar ratio ((b) / (c)) of the higher alcohol (b) having 14 to 30 carbon atoms to the hydrophilic surfactant (c) is 2 or more and 7.5 or less, preferably 2 or more. 5.5 or less. If (b) / (c) is less than 2, it is difficult to stably maintain the cosmetic if it is less than 2, and if it exceeds 7.5, the permeability is poor.

  The compounding quantity of water (d) in this invention is 30-95 mass% in cosmetics whole quantity, More preferably, it is 40-95 mass%.

  In the present invention, by further blending a water-soluble polyhydric alcohol, the moisturizing effect for a long time is further enhanced. Examples of the water-soluble polyhydric alcohol include glycerin, polyglycerin, butylene glycol, dipropylene glycol, polyethylene glycol, maltitol, sorbitol, xylitol, and erythritol.

  0.1-30 mass% is preferable in the cosmetics whole quantity, and, as for the compounding quantity of water-soluble polyhydric alcohol, More preferably, it is 0.2-20 mass%.

  The cosmetic according to the present invention can be applied to the skin, lips, hair and the like, but more preferably exhibits a particularly excellent function when used as a skin cosmetic and can be used as a skin softening cosmetic. . Moreover, it is suitable that it is an oil-in-water type emulsified cosmetic.

  The cosmetic of the present invention can contain components that can be added to the cosmetic as long as the effects of the present invention are not detrimentally hindered. Examples of these components include oils, surfactants, humectants, powders, granules, drugs, ultraviolet absorbers, preservatives, buffers, and fragrances.

  Examples of the cosmetic composition according to the present invention include lotion, milky lotion, beauty essence, cream, massage cosmetics, UV protection cosmetics, makeup base, foundation, lipstick, hair rinse, hair treatment, hair styling and the like.

Hereinafter, the present invention will be described in more detail using specific examples. However, the scope of the present invention should not be limited by these examples. Moreover, the compounding quantity in a present Example is the mass% unless there is particular notice.
Details evaluated in the examples are described below. Evaluation of whether or not a test product described later exhibits the effect of the present invention was performed by the method described below.

(1) Permeability Each sample diluted to 10% by mass was dropped onto a stratum corneum sheet that had fallen off from a human sunburn site, and the storage elasticity after 10 minutes was measured using a viscoelasticity measuring instrument (manufactured by Toyo Seiki Co., Ltd.). .
○ (High permeability): Storage elasticity is less than 10% before coating Δ (Medium permeability): Storage elasticity is 10% or more and less than 25% before coating × (Low permeability): Storage elasticity is 25 before coating %more than

(2) Skin softening effect Each sample diluted to 10% by mass is dropped onto a stratum corneum sheet that has fallen off from a human sunburn site, and the storage elasticity after 2 hours is measured using a viscoelasticity measuring instrument (manufactured by Toyo Seiki Co., Ltd.). It was measured.
○: Storage elasticity is less than 85% before application (high flexibility effect)
Δ: Storage elasticity is 85% or more and less than 95% before application (during softening effect)
X: Storage elasticity is 95% or more before coating (soft effect is small)

(3) Sustained moist feeling Twenty professional panels evaluated the moist feeling after 8 hours from application.
○: 15 or more panels evaluated that the moisture persisted △: 8 or more panels evaluated that the moisture persisted 14 or less ×: 7 panels evaluated that the moisture persisted Below

(4) Stability over time The sample was stored at 50 ° C. for 3 months, and its stability was evaluated.
◯: There is no change in appearance, and the viscosity decrease / increase is less than 25% compared to the initial value.
(Triangle | delta): Some oil floats in a gas-liquid interface, and the viscosity fall and rise of 25% or more and less than 50% are seen.
X: Separation and reduction or increase in viscosity of 50% or more are observed.

Examples 1-5, Comparative Examples 1-5
The cosmetics having the formulations shown in Table 1 were prepared by the following methods, and the obtained cosmetics were evaluated for permeability, skin softening effect, moisture retention, and temporal stability according to the above methods. . The results are also shown in Table 1.

(Production method)
A solution in which components (12) to (16) are uniformly dissolved is heated to 60 ° C., and a mixture of (1) to (11) at 70 ° C. is added with stirring to uniformly disperse and cooled to 30 ° C. To obtain an emulsion.

* 1: Sanespole G218 (manufactured by Taiyo Chemical Co., Ltd.)
* 2: Cosmall 43 (Nisshin Oil Industries)
* 3: NIKKOL Tetraglyn 5-S (Nikko Chemicals)
* 4: NIKKOL DGS-80 (Nikko Chemicals)
* 5: Sanespole GTI (S) (manufactured by Taiyo Chemical Co., Ltd.)
* 6: Cosmall 42 (Nisshin Oil Industries)

  From the results obtained above, when each essential component was within the suitable range, it was excellent in permeation, skin softening effect and moist feeling while maintaining stability over time. In Comparative Example 1 and Comparative Example 3, the added oil component was composed only of an oil component not containing a hydroxyl group, and was inferior in permeation, skin softening effect, and moisture feeling. In Comparative Example 2, 50% or more of the hydroxyl group contained in the polyhydric alcohol used as the raw material of the ester remains in the added oil, and the stability over time It was inferior to. Further, in Comparative Example 4 in which the number of moles of the higher alcohol added was 7.5 times or more of the number of moles of the activator, the permeability, skin softening effect, and moisture persistence were poor. In Comparative Example 5 in which the molar ratio of the higher alcohol to the hydrophilic active agent was less than 2, the moisture feeling and the stability over time were inferior.

  Examples of the present invention will be described below with reference to examples. The cosmetics of these examples were prepared by a conventional method, and were excellent in permeability, skin softening effect, and persistence of moisture while having high temporal stability.

(Example 6) Lotion (1) Glyceryl trioctanoate 1% by mass
(2) Diglycerin triisostearate 1
(3) Diglycerin diisostearate 0.2
(4) Oleyl alcohol 0.3
(5) Polyoxyethylene (60) hydrogenated castor oil 1
(6) Ethanol 10
(7) Polyethylene glycol 1
(8) Dipropylene glycol 5
(9) Ascorbic acid glucoside 2
(10) Aminomethylpropanediol 0.7
(11) Buffer proper amount (12) Preservative proper amount (13) Purified water residue

(Example 7) Cream (1) Squalane 5% by mass
(2) Pentaerythrityl tetraoctanoate 8
(3) Glycerin diisostearate 8
(4) Propylene glycol isostearate 3
(5) Dimethicone 3
(6) Cetanol 2
(7) Stearyl alcohol 2
(8) Polyoxyethylene isostearate (60) Glyceryl 1
(9) Sodium stearoyl methyl taurine 1
(10) Tranexamic acid 1
(11) Glycerin 10
(12) 1,3-butylene glycol 7
(13) Preservative appropriate amount (14) Purified water residue

(Example 8) Foundation (1) Dimethicone 4% by mass
(2) Cyclomethicone 4
(3) Decaglyceryl tetrastearate 4
(4) Cetyl octanoate 4
(5) Behenyl alcohol 0.8
(6) Batyl alcohol 0.8
(7) Stearic acid 1
(8) 1,3-butylene glycol 10
(9) Celtrol 0.5
(10) Talc 1
(11) Titanium oxide 3
(12) Red iron oxide 0.2
(13) Yellow iron oxide 1
(14) Black iron oxide 0.1
(15) 10% aqueous sodium hydroxide solution 1.2
(16) Preservative appropriate amount (17) Purified water residue

(Example 9) Lipstick (1) Liquid paraffin 2% by mass
(2) Diglyceryl triisostearate 5
(3) Alkyl-modified silicone resin-coated pigment 7
(4) Polyoxyalkylene-modified organopolysiloxane 0.5
(5) Phenyltrimethicone 5
(6) Octyl paramethoxycinnamate 5
(7) Acrylic silicone 2
(8) PCA Dimethicone 1
(9) Behenyl alcohol 0.4
(10) PEG-100 hydrogenated castor oil 2
(11) Dynamite glycerin 6
(12) Xanthan gum 0.1
(13) Carboxymethylcellulose 0.3
(14) Acryloyldimethyltaurine sodium / hydroxyethyl acrylate copolymer 1.5
(SIMULGEL NSTM: manufactured by Seppic) (content: 35-40% by mass)
(15) Preservative appropriate amount (16) Purified water residue

(Example 10) Treatment (1) Liquid paraffin 5% by mass
(2) Decaglyceryl heptearate 2
(3) Dimethylpolysiloxane 5
(4) Cetanol 2.3
(5) Stearyl alcohol 1
(6) Lipophilic glyceryl monostearate 2
(7) Polyoxyethylene (60) glyceryl isostearate 4
(8) 1,3-butylene glycol 10
(9) Polyoxypropylene (10) glyceryl ether 2
(10) Polyquaternium-19 0.5
(11) Preservative appropriate amount (12) Fragrance appropriate amount (13) Purified water residue

Claims (6)

(A) The following chemical formula (1):

(In the formula, R1 to R3 are hydrogen atoms or hydroxyl groups, at least one is a hydroxyl group, n1, n2 is 0 or 1, and n3 is an integer of 1 to 10.)
A reaction in which the number of unreacted hydroxyl groups contained in one molecule of the ester is an ester of a polyhydric alcohol represented by the formula (1) and a linear or branched fatty acid having 8 to 30 carbon atoms. When the number of hydroxyl groups contained in one molecule of the previous polyhydric alcohol is 2, the average degree of esterification is 51% or more when the number of hydroxyl groups contained in one molecule of the polyhydric alcohol before the reaction is 3 or more. An ester that is less than 95% (b) a higher alcohol having 14 to 30 carbon atoms (c) a hydrophilic surfactant (d) water, and a molar ratio of (b) to (c) ((b) / (c )) Is 2 or more and 7.5 or less.   The polyhydric alcohol represented by the chemical formula (1) is one or more selected from propylene glycol, dipropylene glycol, trimethylolpropane, erythritol, glycerin, diglycerin, tetraglycerin, hexaglycerin, and decaglycerin. The cosmetic according to claim 1.   The cosmetic according to claim 1, further comprising a water-soluble polyhydric alcohol.   The cosmetic according to claim 1, wherein the content of the ester (a) is 10 to 100% by mass of the total oil content including the ester (a).   The cosmetic according to any one of claims 1 to 4, which is an oil-in-water emulsified cosmetic. The cosmetic according to any one of claims 1 to 5, which is a skin cosmetic.