JPH0764702B2 - Multi-phase emulsion cosmetics - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a multi-phase emulsion type cosmetic exhibiting an oil phase / perfluoroorganic compound phase / water phase type (hereinafter abbreviated as O / F / W type) dispersion state. Regarding fees.

More specifically, the present invention relates to a novel multiphase emulsified cosmetic composition having excellent practical properties such as storage stability, spreadability, detergency and water resistance.

(Prior Art) Japanese Patent Laid-Open No. 57-21312 discloses a perfluoro organic compound phase / water phase type (hereinafter abbreviated as F / W type) dispersion state in which a perfluoro organic compound is dispersed and emulsified in water. A breathable ointment which is an emulsified composition to be presented has been proposed. But,
This emulsion composition had poor storage stability and poor practicality.

DISCLOSURE OF THE INVENTION The present inventor has diligently studied an emulsion composition containing a perfluoroorganic compound, which sufficiently exhibits various properties such as spreadability, detergency and water resistance, which are excellent properties of the perfluoroorganic compound. As a result, it is shown that the cosmetic composition comprising a multi-phase emulsion type composition exhibiting a specific O / F / W type dispersion state, which will be described later, has these various characteristics and is further excellent in storage stability. Heading The present invention has been completed.

(Object of the invention) That is, the object of the present invention is storage stability, spreadability, detergency,
It is intended to provide a multi-phase emulsion cosmetic having excellent practical properties such as water resistance.

(Structure of the Invention) The present invention comprises: (a) dissolving a lipophilic fluorosurfactant having a perfluorocarbon group and a hydrocarbon group in a molecule in a perfluoroorganic compound, and (b) dispersing and emulsifying an oil component therein. To obtain an oil-in-water emulsion of a perfluoroorganic compound, and (c) an emulsion obtained by dispersing and emulsifying this emulsion in an aqueous solution of a hydrophilic fluorochemical surfactant having a perfluorocarbon group and a hydrophilic group / perfluoro It is a multi-phase emulsion type cosmetic exhibiting an organic compound phase / water phase type dispersion state.

(Specific Description of Configuration) The perfluoroorganic compound used in the present invention is a compound having 6 to 20 carbon atoms and all hydrogen atoms substituted with fluorine atoms. For example, perfluorodecane, perfluoroadamantane, perfluorobutyltetrahydrofuran, perfluorooctane, perfluorononane, perfluoropentane, perfluorodecane, perfluorododecane, and tetrafluoroethylene oxide polymer (degree of polymerization 3-10 ), Hexafluoropropylene oxide polymer (polymerization degree 3 to 10), and the like are applied, but the invention is not limited thereto.

These perfluoro organic compounds are used by selecting one kind or two or more kinds according to the kind of cosmetics and the purpose thereof. The blending amount is usually 10 to 70% by weight based on the total weight of the final composition of the cosmetic.

The lipophilic fluorosurfactant used in the present invention is a known compound having a perfluorocarbon group and a hydrocarbon group in the molecule. It is preferable that the total number of carbon atoms of the fluorine-based surfactant is 10 to 30 and that the relationship of carbon number of hydrocarbon group ≦ 2 × (carbon number of perfluorocarbon group) is satisfied. When the carbon number exceeds 30, the solubility and emulsification are poor, and when the total carbon number is less than 10, skin irritation is likely to occur. When the number of carbon atoms in the perfluorocarbon group is less than half the number of carbon atoms in the hydrocarbon group, stable O / F is achieved.
It is not preferable because it is difficult to obtain a type emulsion. Table 1 shows examples of these fluorine-based surfactants. One type or two or more types of fluorosurfactants are selected and used according to the dosage form of the cosmetic of the present invention.

The blending amount is usually 1 based on the total weight of the cosmetic.
~ 6% by weight.

The oil component used in the present invention is a known oily substance for cosmetics, and examples thereof include fats and oils, waxes, hydrocarbons, ester oils, higher alcohols and higher fatty acids.

Examples of fats and oils include castor oil, olive oil, avocado oil, palm oil, cocoa oil, etc., examples of wax include wood wax, lanolin, beeswax, carnauba wax, candelilla wax, etc., and examples of hydrocarbons include petrolatum, fluid. Ester oils such as paraffin, solid paraffin, ceresin, microcrystalline wax, squalane, etc. include stearic acid butyl ester, myristic acid octyldodecyl ester, myristic acid isopropyl ester, lanolin fatty acid isopropyl ester, stearic acid butyl ester, lanolin hexyl ester. Esters, oleic acid oleic ester, adipic acid diisopropyl ester, sebacic acid isopropyl ester, etc., such as stearyl alcohol and oleyl alcohol. Le, Examples of the higher fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, behenic acid, lanolin fatty acids, and the like, not limited thereto. These oil components may be used alone or in combination of two or more, depending on the type of cosmetics and the purpose thereof. The blending amount is usually 5 based on the total weight of the final composition of the cosmetic.
~ 40% by weight.

The hydrophilic fluorosurfactant used in the present invention is a known substance having a perfluorocarbon group and a hydrophilic group in the molecule. Table 2 shows examples of these fluorochemical surfactants. One type or two or more types of fluorosurfactants are selected and used according to the dosage form of the cosmetic of the present invention.

The blending amount is usually 2 to 10% by weight based on the total weight of the final composition of the cosmetic.

Further, the aqueous solution of the hydrophilic fluorine-based surfactant is preferably one obtained by dissolving the hydrophilic fluorine-based surfactant in deionized purified water treated with an ion exchange resin or distilled water. The amount of this aqueous solution is 20 to 85 based on the total weight of the cosmetic.
It is preferably in the range of% by weight.

Next, a method for producing an O / F / W type multi-phase emulsion cosmetic using the above components will be described.

First, an oil-in-permeate (hereinafter abbreviated as O / F type) emulsion of a perfluoroorganic compound is prepared from the perfluoroorganic compound and an oil component. After the lipophilic fluorosurfactant is dissolved in the perfluoroorganic compound, a predetermined amount of oil component is added to this solution and stirred, whereby the perfluoroorganic compound becomes a continuous phase (dispersion medium), and the oil component becomes An O / F type emulsion that is made dispersoid is produced. In this case, it is preferable to dissolve the lipophilic fluorine-based emulsifier in the perfluoroorganic compound or to heat the solution when adding the oil component and stirring the mixture, for example, heating to about 60 ° C to 80 ° C. And perform a predetermined operation. A homomixer is used for stirring.

Next, the above aqueous solution of the hydrophilic fluorochemical surfactant is added to the above.
An O / F emulsion is added to produce a multi-phase emulsified cosmetic that is an O / F / W emulsion. In this case, the aqueous solution of the hydrophilic fluorosurfactant or the O / F type emulsion is preferably heated, and for example, the aqueous solution of the hydrophilic fluorosurfactant heated to 60 to 80 ° C is gently heated with a homomixer or the like. It was agitated and heated to 70-80 ° C in advance.
Add O / F type emulsion and stir for a certain period of time to emulsify and disperse. That is, the O / F type emulsion is used as a dispersoid, and the aqueous solution of the hydrophilic fluorochemical surfactant is used as a dispersion medium (continuous phase).
Is emulsified and dispersed to produce a stable O / F / W type emulsion.

The storage stability of the O / F / W type emulsion of the present invention produced as described above was clearly superior to the F / W type fluorine-based emulsions known so far.

INDUSTRIAL APPLICABILITY The multiphase emulsion cosmetic of the present invention is applied to many other milky liquid or creamy cosmetics such as skin creams, massage creams, cleansing creams, hair creams, makeup bases, hand creams and the like.

In addition to the above, a colorant, a fragrance, an antiseptic, a pigment, an antioxidant and the like can be appropriately added to the skin cosmetic of the present invention within a range that achieves the object of the present invention.

(Example) Hereinafter, the present invention will be described in detail based on Examples and Comparative Examples.

The tests relating to practical properties such as storage stability, skin safety and spreadability, detergency, and water resistance described in Examples are as follows.

(1) Storage stability test Put the sample in a constant temperature bath at 45 ° C and observe the emulsified state and appearance after standing for 3 months. If no abnormality is observed (emulsion state is uniform and homogeneous emulsion is formed). If there is an abnormality (when the oil separates, when the particles become coarse, etc.), it is regarded as bad.

(2) Practical characteristics test Twenty subjects used the sample continuously for 10 days, and then evaluated the characteristics of the sample.

The test results show that for each of the items of spreadability, cleanability, and water resistance, "good spreadability (spreading) when applying the sample", "good sample washability", "good water resistance of the sample ( It is indicated by the number of respondents who answered "small".

Example 1 (skin cream) (1) Treatment (2) Production method The components heated to 60 ° C and uniformly dissolved are added to the components heated to 60 ° C while stirring with a homomixer to disperse and emulsify to obtain an O / F type emulsion.

Then, add the O / F emulsion obtained above to the components that were uniformly heated by heating to 60 ° C while slowly stirring with a homomixer, and cool to room temperature to cool the O / F / W.
A type emulsion was obtained.

(3) Characteristics Table 3 shows the test results for various characteristics.

As shown in Table 3, the skin cream of Example 1 of the present invention is excellent in storage stability and spreadability which is a practical property. Also, since perfluorodecalin in the component volatilizes over time after being applied to the skin, there is little sealing feeling,
It was found to be a refreshing skin cream.

Comparative Example 1 (Skin Cream) The skin cream of Comparative Example 1 was obtained by the same method as in Example 1 except that the formulation was as follows.

(1) Method Add the components uniformly dissolved at 60 ° C to the components uniformly heated at 60 ° C, stir evenly with a homomixer, and then cool to room temperature.

(2) Characteristics As shown in Table 3, the emulsion prepared without forming the O / F type emulsion was inferior in storage stability.

Comparative Example 2 (skin cream) (1) Process O / of Comparative Example 2 was performed in the same manner as Comparative Example 1 except that 30.0% by weight of perfluorodecalin and 10.0% by weight of MOD were blended with 40.0% by weight of MOD. A W type skin cream was obtained.

(2) Characteristics As shown in Table 3, the skin cream containing no perfluoroorganic compound was not only poor in spreadability but also had a tight seal.

Example 2 (cleansing cream) (1) Treatment (2) Manufacturing method In the same manufacturing method as in Example 1, the cleansing cream of the present invention was obtained.

(3) Characteristics As shown in Table 3, it was confirmed that the practical characteristics such as storage stability, spreadability and detergency were excellent.

Example 3 (hand cream) (1) Treatment (2) Manufacturing method The hand cream of the present invention was obtained by the same manufacturing method as in Example 1.

(3) Characteristics As shown in Table 3, it was confirmed that the hand cream of the present invention had excellent storage stability, spreadability and water resistance, and had a slightly sticky feeling.

Example 4 (hair cream) (1) Treatment (2) Manufacturing method A hair cream of the present invention was obtained by the same manufacturing method as in Example 1.

(3) Characteristics As shown in Table 3, excellent storage stability and spreadability,
When applied, good combability, water resistance, and excellent practical styling properties were recognized.

(Effects of the Invention) As described above, it is apparent that the present invention provides a useful multi-phase emulsion cosmetic having excellent practical properties such as storage stability, spreadability, detergent and water resistance.

Claims (1)

[Claims] (1) A lipophilic fluorosurfactant having a perfluorocarbon group and a hydrocarbon group in a molecule is dissolved in a perfluoroorganic compound, and (b) an oil component is dispersed and emulsified in this to give perfluoro. An oil phase / perfluoroorganic compound phase / obtained by dispersing and emulsifying this emulsion in an aqueous solution of a hydrophilic fluorochemical surfactant having a perfluorocarbon group and a hydrophilic group A multi-phase emulsion cosmetic that exhibits an aqueous phase dispersion state.