JP2001058922A - Water-in-oil type emulsified cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject cosmetic having smooth touch and excellent in stability and also fluidity by including a dextrin esterified with a specific fatty acid and dextrin esterified with a straight-chain fatty acid. SOLUTION: This cosmetic excellent in fluidity is obtained by including (A) a dextrin esterified with fatty acid(s) comprising a branched fatty acid and/or unsaturated fatty acid and (B) a dextrin esterified with a straight-chain fatty acid; wherein the content weight ratio for the components A and B i.e., A/B = preferably (2:3) to (9:1). The total content of the components A and B in this cosmetic is preferably 0.1-20 wt.% in the oil base, more preferably 0.5-10 wt.%. The excellent fluidity means such as state that the contents in a vessel flows when filling the vessel having a wide mouth with this cosmetic and inclining the vessel, and the viscosity of this cosmetic measured with a Brookfield rotational viscometer is preferably about <=10,000 cps.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-in-oil type emulsified cosmetic, and more particularly, to a water-in-oil type emulsified cosmetic having a smooth feel, excellent stability, and excellent fluidity. It is.

[0002]

2. Description of the Related Art Water-in-oil emulsions are widely used in cosmetics and pharmaceuticals because of their excellent sweat resistance and water resistance. ,
It has attracted attention as a dosage form having high effects such as long-lasting makeup.

Hitherto, various methods have been employed to enhance the stability of water-in-oil type emulsified cosmetics. For example, a method of imparting thixotropy to an external phase oil, a method of blending a high concentration of solid oil or semi-solid oil in an external oil phase, a method of blending an electrolyte substance in an internal aqueous phase, and a method of gelling an internal aqueous phase , A method of increasing the ratio of the aqueous phase, and a method of increasing the blending amount of the surfactant.

[0004] Among the above-mentioned methods for improving the stability, the method of imparting thixotropic property to the external phase oil is the most general method, and specifically, a method of imparting organic modified clay mineral, sucrose fatty acid ester, dextrin fatty acid ester and the like. This is a method of blending an oil gelling agent. Among these oil gelling agents, JP-A-8-277302 discloses that a dextrin esterified with a linear fatty acid and a branched fatty acid and / or an unsaturated fatty acid is effective as a gelling agent having a high thixotropic property. Is disclosed.

[0005]

However, in the case where the stability of the water-in-oil type emulsified cosmetic is increased by the above method, the thixotropy must be increased, and as a result, The resulting cosmetic has a high viscosity, making it difficult to reduce undesired touches such as oiliness and stickiness. Further, in this method, it is difficult to satisfy the stability while maintaining the fluidity in order to realize a smooth elongation and spreading feeling. Therefore,
It has been desired to develop a water-in-oil type emulsified cosmetic having a smooth feel, excellent stability, and excellent fluidity.

[0006]

Under such circumstances, the present inventors have conducted intensive studies and as a result, as a gelling agent for imparting thixotropy to an external phase oil, dextrin esterified with a linear fatty acid, a branched fatty acid and By using a dextrin esterified with a fatty acid containing an unsaturated fatty acid in combination, a water-in-oil type emulsion cosmetic having a smooth feel, excellent stability, and excellent fluidity can be obtained. And completed the present invention.

That is, the present invention provides the following components (a) to
(B) a water-in-oil type emulsified cosmetic comprising (a) dextrin esterified with a fatty acid containing a branched fatty acid and / or an unsaturated fatty acid, and (b) dextrin esterified with a linear fatty acid. Things.

[0008]

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

The present invention relates to a water-in-oil type emulsified cosmetic having excellent fluidity. In the present invention, the term "excellent in fluidity" means that a water-in-oil type emulsified cosmetic is filled in a container having a wide mouth. Sometimes, when the container is tilted, this refers to the state in which the contents flow, and the viscosity value measured with a B-type rotational viscometer is approximately 10,000 c
ps or less is preferable.

[0010] The component (a) dextrin esterified with a fatty acid containing a branched fatty acid and / or an unsaturated fatty acid used in the present invention, which alone gels the oil,
When combined with the component (b) in a water-in-oil type emulsified cosmetic, it is an oil gelling agent that does not increase viscosity and can improve stability. The fatty acid used for the component (a) essentially contains a branched fatty acid and / or an unsaturated fatty acid. The branched fatty acid preferably has 4 to 26 carbon atoms, and the unsaturated fatty acid preferably has 6 to 30 carbon atoms. Also,
It is particularly preferable to combine the branched fatty acid or unsaturated fatty acid with a linear fatty acid having 8 to 22 carbon atoms. Moreover,
It is also possible to add a linear fatty acid having 6 or less carbon atoms to the combination of the branched fatty acid or unsaturated fatty acid and a linear fatty acid having 8 to 22 carbon atoms. The dextrin used for the component (a) preferably has an average sugar polymerization degree of 3 to 150.

In the component (a), the degree of substitution of fatty acid per glucose unit of dextrin is 1.0 to 3.0.
Is preferred. In addition, the fatty acid composition preferably has a molar ratio of one or more of a branched fatty acid, an unsaturated fatty acid, or a fatty acid having 6 or less carbon atoms and a straight-chain fatty acid of 50:50 to 1:99. Particularly, in the present invention, the molar ratio of 2-ethylhexanoic acid to palmitic acid is 17:83 to 7:93, and the degree of substitution of fatty acids per glucose unit is 1.35-1.
The esterified dextrin of No. 65 is preferable, and examples of commercially available products include Leopearl TT (manufactured by Chiba Flour Milling Co., Ltd.).

The component (b) dextrin esterified with a linear fatty acid used in the present invention, which alone gels oil, is used in combination with the component (a) to form a water-in-oil emulsion cosmetic. Is an oil gelling agent that does not increase viscosity and can improve stability. Component (b)
The dextrin used for the above has an average sugar polymerization degree of 3 to 150.
The fatty acid is preferably a straight-chain fatty acid having 8 to 22 carbon atoms. Furthermore, the substitution degree of the fatty acid per glucose unit of dextrin in the component (b) is preferably 1 to 3. In particular, in the present invention, palmitic acid ester of dextrin having a degree of substitution of fatty acid per glucose unit of 1.35 to 2.35 is preferable. Is mentioned.

In the water-in-oil emulsion cosmetic of the present invention, the content ratio of the components (a) and (b) is (a) by weight:
(B) = 2: 3 to 9: 1 is preferred. Within this range, the fluidity is excellent without impairing other feelings.

In the water-in-oil emulsion cosmetic of the present invention, the total content of the component (a) and the component (b) is 0.1 to 0.1 in the oil system.
20% by weight (hereinafter simply referred to as "%") is preferred,
0.5-10% is more preferred. Within this range, the fluidity is excellent without impairing other feelings.

In the water-in-oil emulsion cosmetic of the present invention,
Water is added in addition to the above components. The amount of water in the water-in-oil emulsified cosmetic of the present invention is affected by the desired quality characteristics and is not particularly limited, but is generally about 10 to 80.
% Is preferred.

In the water-in-oil type emulsified cosmetic of the present invention, an oil agent is added in addition to the above components. The oil agent that can be blended in the present invention may be any solid, semi-solid, or liquid oil generally used in cosmetics, including animal oils, vegetable oils, mineral oils, and synthetic oils, including hydrocarbons, oils and fats, and waxes. ,
Esters, fatty acids, higher alcohols, silicone oils, fluorinated oils, lipophilic surfactants and the like can be used. For example, liquid paraffin, squalane, polybutene, petrolatum, paraffin wax, ceresin wax, microcrystalline wax, olive oil, castor oil, jojoba oil, macadamian nut oil, mokuro, beeswax, candelilla wax, carnauba wax, lanolin, myristic acid Isopropyl, isopropyl palmitate, cetyl 2-ethylhexanoate, octyldodecyl myristate, pentaerythritol rosinate, glyceryl trioctanoate, diglyceryl triisostearate, stearic acid, lauric acid, oleic acid, behenic acid, cetanol, stearyl alcohol, Oleyl alcohol, behenyl alcohol, dimethyl polysiloxane, methyl phenyl polysiloxane, methyl hydrogen polysiloxane, cyclic Recone, dimethylpolysiloxane polymer having a three-dimensional crosslinked structure, perfluorooctane, perfluoro decane, perfluoro polyether and the like, and these can be used singly or in combination. The amount of the oil agent in the water-in-oil type emulsified cosmetic of the present invention is affected by the desired quality characteristics and is not particularly limited, but is preferably about 20 to 90% by weight. Within this range, a water-in-oil emulsified cosmetic excellent in feel, stability and fluidity can be obtained.

Further, in the water-in-oil type emulsified cosmetic of the present invention, an emulsifier is added in addition to the above components. The emulsifier that can be blended in the present invention is not particularly limited as long as it forms a water-in-oil emulsion, and may be a nonionic surfactant, an ionic surfactant, an amphoteric surfactant, or the like. Surfactants, oil agents having the property of holding water in oil without using a surfactant, and the like, and one or more of these can be used. Examples of the nonionic surfactant include silicone surfactants such as polyoxyalkylene-modified organopolysiloxane and polyoxyalkylenealkyl co-modified organopolysiloxane, sorbitan fatty acid ester surfactants such as sorbitan sesquioleate, and stearic acid. Examples include glycerin fatty acid ester surfactants such as glyceryl, and polyglycerin fatty acid ester surfactants such as diglycerin diisostearate, diglycerin monoisostearate, and decaglycerin dioleate. The compounding amount of the emulsifier in the water-in-oil emulsified cosmetic of the present invention is an amount necessary for forming a stable emulsion, but is generally preferably 0.1 to 10% by weight. Within this range, a water-in-oil emulsified cosmetic excellent in feel, stability and fluidity can be obtained.

The water-in-oil emulsion cosmetic of the present invention contains, in addition to the above-mentioned components, powders, aqueous components, water-soluble polymers, components (a) and Other components commonly used in cosmetics such as gelling agents, humectants, ultraviolet absorbers, antioxidants, preservatives, chelating agents, fragrances, and cosmetic ingredients other than (b) can be added.

The powder that can be blended in the present invention is spherical, plate-like,
Needle-like shape, fume-like, fine particles, particle size such as pigment grade, porous, non-porous particle structure, etc., is not particularly limited, etc.
Inorganic powders, glitter powders, organic powders, pigment powders,
Composite powders and the like. Specifically, as a coloring agent, titanium oxide, black titanium oxide, konjo, ultramarine, red iron oxide, yellow iron oxide, black iron oxide, zinc oxide, aluminum oxide, magnesium oxide, zirconium oxide, magnesium carbonate, calcium carbonate, barium sulfate , Chromium oxide, chromium hydroxide, carbon black, tar dyes, etc., as touch modifiers, aluminum silicate, magnesium silicate, aluminum magnesium silicate, mica, synthetic mica, synthetic sericite, sericite, talc, silicon carbide , Boron nitride, nylon powder, polymethyl methacrylate, acrylonitrile-methacrylic acid copolymer powder, vinylidene chloride-methacrylic acid copolymer powder, wool powder, silk powder, crystalline cellulose, N-acyl lysine, etc. Oki Bismuth chloride, titanium mica, iron oxide coated mica, iron oxide mica titanium, organic pigment-treated titanium mica, aluminum powder, etc., as ultraviolet ray blocking agents, fine particle titanium oxide, fine particle zinc oxide, fine particle titanium oxide coated mica titanium, fine particle zinc oxide coated Composite powders such as mica titanium and barium sulfate-coated mica titanium may be used, and one or more of these may be used. In addition, these powders
In order to improve dispersibility and adhesion, the surface may be treated by a generally known method such as silicones, fluorine compounds, metal soaps, oils and the like. When the powder is blended with the water-in-oil emulsion cosmetic of the present invention, it is preferably in the range of about 0 to 70%, though it depends on the purpose of blending the powder.

The aqueous component that can be incorporated in the present invention has a refreshing sensation,
For the purpose of moisturizing feeling, alcohols such as ethanol,
Propylene glycol, 1,3-butylene glycol,
(Di) Glycols such as propylene glycol and polyethylene glycol, glycerols such as glycerin, diglycerin and polyglycerin, and plant extracts such as aloe vera, witch hazel, hamamelis, cucumber, lemon, lavender and rose for the purpose of cosmetic effects Examples thereof include liquids, inorganic salts, and sugars, and one or more of these can be used.

The water-soluble polymer that can be incorporated in the present invention is guar gum, sodium chondroitin sulfate, hyaluronic acid, for the purpose of gelling the aqueous phase, forming a film, and moisturizing effect.
Natural gums such as gum arabic, sodium alginate, carrageenan, semi-synthetic gums such as methylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, carboxymethylcellulose, carboxyvinyl polymer, alkyl-added carboxyvinyl polymer, polyvinyl alcohol, polyvinylpyrrolidone, poly Synthetic systems such as sodium acrylate;
One or two or more of these can be used. When a water-soluble polymer is blended with the water-in-oil emulsion cosmetic of the present invention, it is preferably in the range of about 0 to 10%, depending on the blending purpose.

The water-in-oil emulsion cosmetic of the present invention includes foundation, lipstick, blusher, eyeshadow, makeup base, overcoat, sunscreen, serum, milky lotion, cream and the like.

[0023]

The present invention will be described in more detail with reference to the following examples. These do not limit the present invention at all.

Examples 1-4 and Comparative Examples 1-3: Emulsion Emulsions having the composition shown in Table 1 were prepared by the following production method.
Each item of "smooth feel", "stability", and "fluidity" was evaluated by the following evaluation methods, and the results are shown in Table 1.

[0025]

[Table 1]

(Manufacturing method) After uniformly heating, uniformly mixing and dispersing components 1 to 9,
Cool to room temperature. B. Add components 10 to 11 to A and mix. C. Ingredients 12 to 14 are uniformly mixed. D. While stirring B, add C and emulsify. E. FIG. D was filled in a container to obtain an emulsion.

(Sensory Evaluation Method) The emulsions of Examples and Comparative Examples were used by 30 female professional panels, and the "smooth feeling" was evaluated according to the following criteria based on the number of persons who felt that they were good. . Judgment criteria Number of people who evaluated good: Judgment 24 or more: ◎ 16 or more to 23 or less: ○ 8 to 15 or less: △ 7 or less: ×

(Evaluation Method of Stability) After the emulsions of Examples and Comparative Examples were stored at 5 ° C., 40 ° C. and room temperature for 3 months, the emulsified state was observed, and evaluation was made according to the following criteria. Was. Judgment criteria Emulsification state: Judgment No change: ◎ Slight change: ○ Clearly change: △ Separation: X

(Fluidity evaluation method) The emulsion containers of Examples and Comparative Examples were filled,
After storage for months, when the container was tilted, the flowing state was observed and evaluated according to the following criteria. Judgment standard Flowing state: Judge Good flow: ◎ Flow: ○ Difficult to flow: △ Not flow: ×

As is clear from the results shown in Table 1, the emulsions of Examples 1 to 4 according to the present invention are superior to Comparative Examples in terms of smooth feel, stability, fluidity, and satisfying all evaluation items. Was a latex.

Example 5: Liquid foundation (component)% by weight Dextrin fatty acid ester corresponding to component (a) of the present invention (Note 1) 0.5 2. 2. Dextrin fatty acid ester corresponding to component (b) of the present invention (Note 2) 0.5 Hardened oil 0.5 4. Propylene glycol dicaprate 5 5. Neopentyl glycol di-2-ethylhexanoate 5 6. Decamethylcyclopentasiloxane 20 7. Liquid paraffin 3 8. Organically modified bentonite 0.5 9. Titanium oxide 9 10. Iron oxide 2 11. Talc 5 12. Polyoxyethylene / methylpolysiloxane copolymer (Note 3) 2 13 Sorbitan sesquioleate 1 14. Decaglycerin heptaolate 0.5 15. Phenoxyethanol 0.3 16. Ethanol 10 17. Remaining purified water * Note 1: Leopard TT (Chiba Milling) * Note 2: Leopard KL (Chiba Milling) * Note 3: Silicone KF6015 (Shin-Etsu Chemical Co., Ltd.)

(Production Method) Dissolve components 1-4 uniformly. B. Components 5 to 14 are evenly dispersed with three rollers. C. Ingredients 15 to 17 are uniformly mixed. D. A and B are uniformly dispersed. E. FIG. While stirring D, add C and emulsify. F. E was filled in a container to obtain a liquid foundation. The liquid foundation of Example 5 had a smooth feel, was excellent in stability, and was excellent in fluidity.

Example 6: Control color (component)% by weight 1. Dextrin fatty acid ester corresponding to component (a) of the present invention (Note 1) 1.5 2. 2. Dextrin fatty acid ester corresponding to component (b) of the present invention (Note 2) 0.6 Hardened oil 0.3 4. Propylene glycol dicaprate 5 5. Neopentyl glycol di-2-ethylhexanoate 10 6. Decamethylcyclopentasiloxane 15 7. Liquid paraffin 5 8. Organically modified clay mineral 0.79. Titanium mica 3 10. Titanium oxide 1 11. Talc 3 12. Polyoxyalkylene alkyl co-modified organopolysiloxane (Note 3) 2 13 13. Sorbitan sesquioleate 0.5 14. Polyoxyethylene sorbitan monooleate 0.3 Phenoxyethanol 0.3 16. Ethanol 10 17. Remaining purified water Note 1: Leopard TT (Chiba Milling) Note 2: Leopard TL (Chiba Milling) Note 3: ABIL EM90 (Gold Schmidt)

(Manufacturing method) Dissolve components 1-4 uniformly. B. Components 5 to 14 are evenly dispersed with three rollers. C. Ingredients 15 to 17 are uniformly mixed. D. A and B are uniformly mixed. E. FIG. While D is being stirred, D is added and emulsified. F. E was filled into a container to obtain a control color. The control color of Example 6 had a smooth feel, was excellent in stability, and was excellent in fluidity.

[0035]

The water-in-oil emulsion cosmetic of the present invention has a smooth feel, is excellent in stability, and is excellent in fluidity.

Continued on front page F-term (reference) 4C083 AA122 AB052 AB232 AB242 AB442 AC022 AC102 AC172 AC251 AC252 AC261 AC262 AC392 AC422 AC442 AC692 AD162 AD172 AD241 AD242 CC01 CC05 CC12 DD32 EE01 EE06 EE07 4D077 AA09 AB11 AC02 BA07 BA15 DA02Y DC02DE02Y DE08Y DE09Y DE13Y DE13Z 4G065 AA01 AB01X AB03X AB05X AB06Y AB10X AB12Y AB28X AB29X AB32X AB33X BA01 BA02 BA05 BA06 BA09 BB01 CA04 DA02 EA01

Claims (3)

[Claims] The following components (a) and (b): (a) dextrin esterified with a fatty acid containing a branched fatty acid and / or an unsaturated fatty acid; and (b) dextrin esterified with a linear fatty acid. A water-in-oil type emulsified cosmetic characterized by containing. 2. The content ratio of component (a) to component (b) is as follows:
The water-in-oil type emulsified cosmetic according to claim 1, wherein the weight ratio is (a) :( b) = 2: 3 to 9: 1. 3. The water-in-oil emulsion according to claim 1, wherein the total content of the component (a) and the component (b) is 0.1 to 20% by weight in the oil system. Cosmetics.