JP6510974B2 - Milky cosmetic composition - Google Patents

Description

  The present invention relates to an emulsion cosmetic composition, and more particularly to an emulsion cosmetic composition having excellent dispersion stability which is useful as a skin care cosmetic such as an emulsion, a hair care cosmetic such as a conditioner and the like. Priority is claimed on Japanese Patent Application No. 2013-052159, filed on March 14, 2013, the content of which is incorporated herein by reference.

  The milky cosmetic composition does not slip on the skin or the hair surface at the time of application because it does not have watery like an aqueous solution, is excellent in spreadability, is more easily conformable to the skin or hair than gels, and is sticky It is preferred by consumers because it has no good feel on use.

  However, the emulsion cosmetic composition is susceptible to phase separation, and it has been difficult to maintain the emulsion state. For example, when using a polyoxyethylene surfactant as an emulsifying agent, the polyoxyethylene surfactant has insufficient emulsifying power for polar oils, so in order to maintain the emulsion state, only a small amount of oil is incorporated. It was not enough in terms of spreadability and familiarity. In addition, there are also considerable limitations on the types of oils that can be blended. And, since it is necessary to add a large amount of surfactant in order to emulsify the amount of oil that can obtain spreadability and conformability, there is a concern about an increase in skin irritation.

  Patent Document 1 describes a milky cosmetic composition having a transparent or translucent appearance, which is obtained by using a silicone surfactant as an emulsifier and using a silicone oil as an oil agent. In this case, however, the viscosity of the silicone oil is limited to 10 cSt or less, and the amount that can be blended (40 wt% or less) is also insufficient to obtain the spreadability and the conformability.

  Therefore, at present, no emulsion cosmetic composition having dispersion stability, good feeling in use, and safety has been found.

JP 10-120524 A

  Accordingly, an object of the present invention is to provide a milky cosmetic composition having both dispersion stability, good feeling in use and safety.

  As a result of intensive studies to solve the above problems, the present inventors have found that a specific polyglycerin fatty acid ester is excellent in safety and can be emulsified without particular limitation as long as it is an oil generally used in cosmetic compositions. An emulsion that combines polyglycerin fatty acid ester with polyhydric alcohol, water, and oil, has excellent dispersion stability, spreads well, is easy to conform to skin and hair, has a good feeling of use without stickiness, and safety. It has been found that it is possible to form a cosmetic composition. The present invention has been completed based on these findings.

That is, the present invention is an emulsion cosmetic composition containing the following components, wherein the weight ratio of the aqueous phase component containing the components (1) to (3) and the oil phase component containing the component (4) (the former / the latter) Provided is a cosmetic cosmetic composition having a ratio of 25/75 to 45/55.
Component (1): Polyglycerin fatty acid ester containing a compound represented by the following formula (1): RCOO- (C ₃ H ₆ O ₂ ) n H (1)
(In the formula, R represents an aliphatic hydrocarbon group having 9 to 17 carbon atoms. N represents the degree of polymerization of glycerin, and is an integer of 10 or more.)
Component (2): Polyhydric alcohol Component (3): Water Component (4): Oil

  The present invention also provides the above-mentioned milky cosmetic composition wherein the polyglycerin fatty acid ester of component (1) has an HLB of 10.0 or more and a monoesterification rate of 30% or more.

That is, the present invention relates to the following.
[1] A emulsion cosmetic composition comprising the following components, wherein the weight ratio of the aqueous phase component containing the components (1) to (3) to the oil phase component containing the component (4) (former / latter) is 25 Emulsion cosmetic composition which is / 75 to 45/55.
Component (1): Polyglycerin fatty acid ester containing a compound represented by the following formula (1): RCOO- (C ₃ H ₆ O ₂ ) n H (1)
(In the formula, R represents an aliphatic hydrocarbon group having 9 to 17 carbon atoms. N represents the degree of polymerization of glycerin, and is an integer of 10 or more.)
Component (2): Polyhydric alcohol Component (3): Water Component (4): Oil [2] The HLB of the polyglycerin fatty acid ester of component (1) is 10.0 or more, and the monoesterification ratio is 30% or more The emulsion cosmetic composition as described in [1].
[3] The emulsion cosmetic composition according to [1] or [2], wherein the content of the component (1) is 0.1 to 10% by weight of the total amount (100% by weight) of the emulsion cosmetic composition .
[4] The content of the component (2) is 1.0 to 15.0% by weight of the total amount (100% by weight) of the emulsion cosmetic composition described in any one of [1] to [3] Emulsion cosmetic composition.
[5] The content of the component (3) is 25.0 to 45.0% by weight of the total amount (100% by weight) of the emulsion cosmetic composition described in any one of [1] to [4] Emulsion cosmetic composition.
[6] The milky lotion as described in any one of [1] to [5], wherein the content of the component (4) is 50 to 75% by weight of the total amount (100% by weight) of the milky cosmetic composition Composition.

  Since the emulsion cosmetic composition of the present invention has the above-mentioned constitution, it has dispersion stability, good feel in use and safety. Therefore, it can be suitably used in a wide range of fields such as skin care cosmetics such as emulsions, and hair care cosmetics such as conditioners.

The emulsion cosmetic composition of the present invention is characterized by containing the following components. The following components (1) to (3) constitute an aqueous phase, and the following component (4) constitutes an oil phase.
Component (1): Polyglycerin fatty acid ester Component (2): Polyhydric alcohol Component (3): Water Component (4): Oil

[Component (1): polyglycerin fatty acid ester]
The polyglycerin fatty acid ester of the present invention contains a compound represented by the following formula (1) (= polyglycerin mono fatty acid ester).
_{RCOO- (C 3 H 6 O 2} ) n-H (1)
(In the formula, R represents an aliphatic hydrocarbon group having 9 to 17 carbon atoms. N represents the degree of polymerization of glycerin, and is an integer of 10 or more.)

C ₃ H ₆ O ₂ in the parentheses of Formula (1) has both structures represented by the following Formulas (2) and (3).
_{-CH 2 -CHOH-CH 2 O- (} 2)
_{-CH (CH 2 OH) CH 2} O- (3)

R represents an aliphatic hydrocarbon group having 9 to 17 carbon atoms, and examples thereof include C ₉ such as n-nonyl, n-decyl, n-undecyl, n-dodecyl, n-tridecyl, n-tetradecyl, n-heptadecyl and the like _-17 linear alkyl groups; C _9-17 linear alkenyl groups such as n-nonenyl, n-decenyl, n-undecenyl, n-dodecenyl, n-tridecenyl, n-tetradecenyl, n-heptadecenyl and the like; s-nonyl, t-nonyl, isodecyl, s-decyl, t-decyl, isododecyl, s-dodecyl, t-dodecyl, isotridecyl, s-tridecyl, t-tridecyl, isotetradecyl, s-tetradecyl, t-tetradecyl, isoheptadecyl, s- heptadecyl, C _9-17 branched-chain alkyl group such as t-heptadecyl group; Isononeniru, s- nonenyl, t- Nenyl, isodecenyl, sec-decenyl, tert-decenyl, isododecenyl, sec-dodecenyl, tert-dodecenyl, isotridecenyl, sec-tridecenyl, tert-tridecenyl, isotetradecenyl, sec-tetradecenyl, tert-tetradecenyl, isoheptadecese And C _9-17 branched alkenyl groups such as nyl, s-heptadecenyl and t-heptadecenyl groups.

  Among them, a linear aliphatic hydrocarbon group having 11 to 13 carbon atoms (in particular, a linear alkyl group) is preferable as R. The compound represented by the formula (1) in which R is the group described above is preferable in that it can form a milky cosmetic composition having excellent emulsifying power and excellent in dispersion stability, feel in use, and safety.

  n represents the degree of polymerization of glycerin and is an integer of 10 or more, preferably 10 to 15, and particularly preferably 10. When n is less than the above range, the emulsifying power tends to be reduced, and it may be difficult to obtain an emulsion cosmetic composition.

  The compound represented by Formula (1) can be used individually by 1 type or in mixture of 2 or more types.

  As a method for producing the compound represented by the formula (1), for example, in the presence of an acid catalyst, the fatty acid / glycidol (molar ratio) has a specific value (for example, about 1/10 to 1/15) in the fatty acid There is a method of adding and reacting glycidol in such a ratio. According to this method, the compound represented by the above formula (1) can be produced in an excellent yield.

  The polyglycerin fatty acid ester of the present invention contains at least the compound represented by the above formula (1). The polyglycerin fatty acid ester of the present invention may contain, for example, polyglycerin difatty acid ester etc. in addition to the compound represented by the above formula (1), but by the above formula (1) in the total amount of polyglycerin fatty acid ester The content of the compound to be represented is, for example, preferably 30% or more, and particularly preferably 40% or more. The upper limit of the content of the compound represented by the above formula (1) in the polyglycerin fatty acid ester is 100% by weight. That is, the monoesterification rate of the polyglycerin fatty acid ester of the present invention is preferably 30% or more, and particularly preferably 40% or more. The monoesterification rate can be measured using high performance liquid chromatography equipped with a reverse phase column and a UV detector.

  When the content of the compound represented by the above formula (1) (or the monoesterification rate) falls below the above range, the hydrophilicity becomes too low and it becomes difficult to dissolve in water, so the obtained milky cosmetic composition Dispersion stability tends to decrease.

  The HLB (Hydrophile-Lipophile Balance; hydrophilic-lipophilic balance) of the polyglycerin fatty acid ester of the present invention is about 10.0 or more (for example, 10.0 to 18.0), preferably 12.0 to 16.5, particularly preferably Preferably it is 14.0-16.5. When a polyglycerin fatty acid ester in which HLB is in the above range is used, an O / W type emulsion can be formed with water and oil, and a milky cosmetic composition with no stickiness and refreshing can be formed. On the other hand, use of a polyglycerin fatty acid ester having an HLB below the above range tends to cause stickiness and to decrease the feeling in use. HLB can be controlled by adjusting the degree of polymerization of glycerin.

  The compounding amount of the polyglycerin fatty acid ester in the emulsion cosmetic composition (100% by weight) of the present invention is, for example, 0.1 to 10.0% by weight, preferably 1.0 to 5.0% by weight, particularly preferably Is 2.0 to 4.0% by weight. When the blending amount of the polyglycerin fatty acid ester is less than the above range, the dispersion stability of the obtained milky cosmetic composition tends to be reduced, and the phase separation tends to be facilitated with the temperature change and the passage of time. On the other hand, when the blending amount of the polyglycerin fatty acid ester exceeds the above range, the feel of use of the obtained milky cosmetic composition is reduced (for example, when applied to hair or skin, spreading and familiarity are deteriorated, it is sticky Etc.) There is a tendency. In addition, skin irritation tends to increase and safety tends to decrease.

[Component (2): polyhydric alcohol]
The polyhydric alcohol of the present invention is a compound having two or more hydroxyl groups in one molecule, and examples thereof include glycerin, diglycerin, polyglycerin, sorbitol, propylene glycol, dipropylene glycol, 1,3-butylene glycol, polyethylene glycol and the like. Straight-chain aliphatic polyhydric alcohols; sugar alcohols such as maltitol, erythritol, mannitol, xylitol and the like, and the like. These can be used individually by 1 type or in mixture of 2 or more types. In the present invention, among these, glycerin and / or diglycerin are preferable in terms of excellent safety.

  The blending amount of the polyhydric alcohol in the emulsion cosmetic composition (100% by weight) of the present invention is, for example, 1.0 to 15.0% by weight, preferably 5.0 to 12.0% by weight, particularly preferably It is 8.0-11.0 weight%. If the blending amount of the polyhydric alcohol is less than the above range, the dispersion stability of the obtained milky cosmetic composition tends to be reduced, and the phase separation tends to be facilitated. On the other hand, when the blending amount of the polyhydric alcohol exceeds the above range, the feeling of use of the obtained milky cosmetic composition is reduced (for example, when it is applied to the hair or the skin, the spread and familiarity become worse, it becomes sticky and the like) )Tend.

[Component (3): water]
As water of the present invention, either hard water or soft water may be used. For example, industrial water, tap water, ion exchanged water, purified water, distilled water and the like can be used.

  The content of water in the emulsion cosmetic composition (100% by weight) of the present invention is 25.0 to 45.0% by weight, preferably 26.0 to 40.0% by weight, particularly preferably 27.0. It is -35.0 wt%, more preferably 27.0-33.0 wt%, and most preferably 27.0-30.0 wt%. When the content of water is below the above range, the viscosity of the resulting milky cosmetic composition tends to increase, and the spreadability and the conformability tend to decrease. On the other hand, when the water content exceeds the above range, it becomes watery and spreadability and familiarity tend to decrease. In addition, the dispersion stability is lowered, and the phase separation tends to be easy with the temperature change and the passage of time, and it tends to be difficult to maintain the emulsion state.

[Component (4): oil]
As the oil of the present invention, most of oils generally used in cosmetics can be used, and examples thereof include ester oil, liquid oil, hydrocarbon, higher fatty acid, triacylglycerol, silicone oil and the like. . These can be used individually by 1 type or in mixture of 2 or more types.

  Examples of the ester oil include diisopropyl adipate, diisobutyl adipate, dioctyl adipate, di-2-hexyldecyl adipate, diisostearyl adipate, isostearyl myristate, isotridecyl myristate, isopropyl myristate, myristic acid Octyldodecyl, cetyl octanoate, isononyl isononanoate, isodecyl isononanoate, isotridecyl isononanoate, diisopropyl sebacate, isopropyl palmitate, hexyl laurate, decyl oleate, decyl dimethyl octanoate, octyl palmitate, lauryl lactate, octyl lactate Dodecyl, isocetyl stearate, isocetyl isostearate, ethylene glycol dioctanoate, dipentaerythritol fatty acid Ester, cetyl caprylic acid, neopentyl glycol dicaprate, mention may be made of diisostearyl malate, and the like.

  Examples of the liquid oil include avocado oil, camellia oil, sunflower seed oil, evening primrose oil, coconut oil, coconut oil, turtle oil, macadamia nut oil, tall oil, corn oil, mink oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, persic oil Oil, wheat germ oil, sasanqua oil, castor oil, linseed oil, safflower oil, cottonseed oil, cotton oil, soy oil, peanut oil, peanut oil, tea seed oil, kaya oil, rice bran oil, Japanese cypress oil, Japanese tung oil, jojoba oil, Germ oil etc. can be mentioned.

  As said hydrocarbon, liquid paraffin, squalene, squalane, pristane etc. can be mentioned, for example.

  Examples of the higher fatty acids include oleic acid and isostearic acid.

  Examples of the triacylglycerol include glyceryl trioctanoate, glyceryl triisopalmitate, glyceryl tri (capryl capric acid), glyceryl tricaprylate and the like.

  Examples of the silicone oil include methylpolysiloxane, dimethylpolysiloxane, methylphenylpolysiloxane, diphenylpolysiloxane, methylcyclopolysiloxane, hexaphenylcyclotrisiloxane, decamethylcyclopentasiloxane, polyether-modified silicone, amino-modified silicone And betaine-modified silicones, alkyl-modified silicones and alkoxy-modified silicones.

  The content of oil in the emulsion cosmetic composition (100% by weight) of the present invention is 50 to 75% by weight, preferably 55 to 70% by weight, particularly preferably 60 to 65% by weight. When the oil content is below the above range, it becomes watery and spreadability and familiarity tend to be reduced. In addition, the dispersion stability is lowered, and it becomes easy to separate due to temperature change, and it becomes difficult to maintain the emulsion state. On the other hand, when the content of oil exceeds the above range, the viscosity of the obtained milky cosmetic composition tends to increase, and the spreadability and the conformability tend to decrease.

  The weight ratio of the aqueous phase component to the oil phase component (the former / the latter) in the emulsion cosmetic composition (100% by weight) of the present invention is 25/75 to 45/55, preferably 30/70 to 45. / 55, particularly preferably 35/65 to 40/60. When the weight ratio of the water phase component to the oil phase component is out of the above range, the feeling in use tends to be lowered. In addition, the said component (1)-(3) is contained in a water-phase component. In addition, the oil phase component contains the component (4).

  In addition to the components described above, the emulsion cosmetic composition of the present invention may be a component usually added to the cosmetic composition, as long as the present invention is not impaired. Urea, sodium hyaluronate, etc., various vitamins, amino acids, herbal medicines, anti-inflammatory agents, cell activators, dyes, preservatives, perfumes, etc.] can be suitably blended. Furthermore, the emulsion cosmetic composition of the present invention may contain a compound other than the component (1) as a surfactant, but in all surfactants contained in the emulsion cosmetic composition of the present invention The proportion of surfactants other than the component (1) (in the case of containing two or more, the total amount thereof) is 10% by weight or less, preferably 5% by weight or less. When the proportion of the surfactant other than the component (1) exceeds the above range, the dispersion stability, the feeling in use and the safety tend to be lowered.

  The emulsion cosmetic composition of the present invention can be produced according to a conventional method, and can be produced, for example, by mixing the components (1) to (4).

  The emulsion cosmetic composition obtained by the above method is excellent in dispersion stability, for example, can prevent phase separation even in a high temperature environment of about 40 ° C., and can maintain the emulsion state over a long period of 120 days or more. In addition, it has no slippage and wateriness like aqueous solutions, is excellent in spreadability, is more easily conformable to skin and hair than gels, and has a good feeling of use with no stickiness and moistness. In addition, it is extremely irritating to the skin and excellent in safety. Therefore, the emulsion cosmetic composition of the present invention can be suitably used in a wide range of fields such as skin care cosmetics such as emulsions, and hair care cosmetics such as conditioners.

  EXAMPLES Hereinafter, the present invention will be more specifically described by way of examples, but the present invention is not limited by these examples.

Examples 1 to 6, Comparative Examples 1 to 3
Each component was mix | blended by the ratio (weight part) as described in the following table, the emulsion cosmetic composition was prepared, and the following method evaluated.

(1) Dispersion stability evaluation The milky cosmetic composition prepared by the Example and the comparative example was left to stand in a 40 degreeC thermostat for 1 month. Then, the presence or absence of state change was observed visually, and the following evaluation criteria evaluated.
<Evaluation criteria>
○: Emulsion state maintained ×: Phase separated

  The emulsion cosmetic composition of the present invention has dispersion stability, good feel in use and safety. Therefore, it can be suitably used in a wide range of fields such as skin care cosmetics such as emulsions, and hair care cosmetics such as conditioners.

Claims (2)

An emulsion cosmetic composition comprising the following components, wherein the content of the component (1) is 2.0 to 4.0% by weight of the total amount of the emulsion cosmetic composition, and the content of the component (2) is an emulsion 8.0 to 15.0% by weight of the total cosmetic composition, the content of the component (3) is 25.0 to 45.0% by weight of the total amount of the emulsion cosmetic composition , the components (1) to (5) 3) A liquid cosmetic composition (containing polyacrylic acid, 20 ° C.) wherein the weight ratio of the aqueous phase component containing 3) and the oil phase component containing component (4) (former / latter) is 25/75 to 45/55 The difference in refractive index between the water phase and the oil phase in
Component (1): Polyglycerin fatty acid ester containing 14.0 to 18.0 of HLB containing a compound represented by the following formula (1) RCOO- (C ₃ H ₆ O ₂ ) _n -H (1)
(In the formula, R represents an aliphatic hydrocarbon group having 9 to 17 carbon atoms. N represents the degree of polymerization of glycerin, and is an integer of 10 or more.)
Component (2): Glycerin Component (3): Water Component (4): Oil Emulsified cosmetic composition of claim 1 mode monoester ratio of the polyglycerol fatty acid ester is 30% or more of component (1).