JP2003063922A - Skin care preparation composition, pearlescent compound and skin care preparation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a skin care preparation composition and pearlescent com pound that can produce a superbly pearlescent skin care preparation having excellent stability, pleasant feelings when applied, moisturing and skin care effect. SOLUTION: This skin care preparation composition includes more than one 14-22C straight fatty alcohol, and a polyglycerin fatty acid ester containing more than one 8-12C straight alkyl group, having weight ratio of 50.0/50.0-98.0/2.0 (straight fatty alcohol/polyglycerin fatty acid ester). The perlescent compound includes the skin care preparation composition and water, having weight ratio of 0.1/99.9-50.0/50.0 (skin care preparation composition/ water).

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a composition for external preparation for skin and a pearlized product capable of producing a stable external preparation for skin which is excellent in pearly luster, feeling of use, and the like, and stable, using these. The present invention relates to an external preparation for skin which has an excellent feeling of use such as a refreshing feeling and a moisturizing feeling, a skin care effect, and an excellent pearl luster.

[0002]

2. Description of the Related Art Conventionally, external preparations for skin including cosmetics have been used for the purpose of protecting the skin from external stimuli.
Its main components are water, oils and fats, waxes, surfactants and the like, and in addition, water-soluble polymers, active ingredients (vitamins, plant extracts, etc.), additives and the like are added. Among these, the waxes are mainly used for the formulation of most creams and emulsions for the purpose of adjusting viscosity and skin feel. The waxes are oils and fats (liquid oil at room temperature) when blended in cosmetics such as creams and emulsions.
It is believed that it dissolves in water, forms a fat film on the skin, and plays a role in protecting the skin. Examples of the waxes include hydrocarbons having a melting point of 50 ° C. or higher, aliphatic alcohols (mainly higher alcohols having 16 to 18 carbon atoms, etc.),
Examples thereof include esters of fatty alcohols and fatty acids, and triglycerides.

However, when wax is used in the formulation of cosmetics, there is a problem that it is difficult to determine an appropriate type and amount of wax. That is, if the amount of the wax to be blended is too large, the wax will coagulate and solidify over time and become hard, so that there is a problem that the feel when applied to the skin and the stability of cosmetics and the like are deteriorated. These are phenomena caused by the crystallization of wax. Further, when a higher alcohol is used for the wax, there is a problem that the crystal form of the higher alcohol changes depending on the temperature, and the higher alcohol coagulates and solidifies at a low temperature. Therefore, there is a problem that it is difficult to prepare waxes capable of forming a lipid film having an excellent moist feeling when applied while preventing such aggregation and solidification.

Further, conventionally, various cosmetics having a pearly luster by providing a pearlized product with cosmetics have been provided. However, inorganic pigments such as mica that have been used as conventional pearlized products cannot be uniformly blended into transparent cosmetics (beauty liquids, lotions, etc.), or the pearlized products settle out over time, and when applied, There were problems such as poor usability. Although a technique for imparting a pearly luster by blending a glycol fatty acid ester with shampoo or the like is also provided, there are problems that it cannot be applied to transparent cosmetics and the usability during application is poor.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the various problems in the prior art and achieve the following objects. That is, the present invention is a composition for a skin external preparation, which is stable, has a feeling of use such as a refreshing feeling, a moisturizing feeling, a moisturizing effect, and a skin care effect, and which can preferably produce a skin external preparation having an excellent pearl luster. And pearlized products, and
An object of the present invention is to provide a skin external preparation that is stable and has excellent feelings of use such as refreshing feeling and moisturizing effect, moisturizing effect and skin care effect, and excellent pearly luster.

[0006]

Means for solving the above-mentioned problems are as follows. <1> At least one linear fatty alcohol having 14 to 22 carbon atoms and a polyglycerin fatty acid ester having at least one linear alkyl group having 8 to 12 carbon atoms in a mass ratio (linear fatty acid Alcohol / polyglycerin fatty acid ester) 50.0 / 50.0 to 98.
The composition for external preparation for skin is characterized by containing 0 / 2.0. <2> 90% by mass to 100% by mass of the straight-chain fatty alcohol is a straight-chain fatty alcohol having the same carbon number, <1.
The composition for external preparations for skin according to the item <>. <3> 98 to 100% by mass of the straight-chain fatty alcohol is a straight-chain fatty alcohol having 14 carbon atoms.
The composition for external preparation for skin according to 1> or <2>.

<4> In the polyglycerin fatty acid ester having a linear alkyl group, the average degree of condensation of the glycerin-derived component derived from the glycerin monomer is 4 to 10
The composition for external preparation for skin according to any one of the above items <1> to <3>. <5> The composition for external preparation for skin according to any one of <1> to <4>, wherein the glycerin fatty acid ester having a linear alkyl group has an average degree of esterification of 1 to 3. <6> In any one of <1> to <5>, the polyglycerin fatty acid ester having a linear alkyl group is at least one of polyglycerin octanoic acid ester, polyglycerin capric acid ester, and polyglycerin lauric acid ester. The composition for external preparation for skin described above.

<7> The composition for external preparation for skin according to any one of <1> to <6> and water are in a mass ratio (composition for external preparation for skin / water) of 0.1 / 99.9. ~ 50.0 / 5
It is a pearlized product characterized by containing 0.0. <8> The composition for external preparation for skin according to any one of <1> to <6> and water are stirred and mixed at 50 to 80 ° C, and then left at 10 to 45 ° C for 20 hours or more to obtain The pearlized product according to <7>. <9> An external preparation for skin, comprising 0.1 to 50.0 mass% of the composition for external preparation for skin according to any one of <1> to <6>. <10> The external preparation for skin according to <9>, which contains 0.1 to 99.9% by mass of the pearlized product according to <7> or <8> and is used in cosmetics.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below. [Composition for external preparation for skin] The composition for external preparation for skin of the present invention contains a straight chain fatty alcohol and a polyglycerin fatty acid ester, and optionally other components.

-Straight-chain fatty alcohol-The number of carbon atoms in the straight-chain fatty alcohol is 14
There is no particular limitation as long as it is at least one of
All known linear fatty alcohols can be used. The number of carbon atoms in the linear fatty alcohol is 14 to 20.
Are preferred, 14-18 are more preferred, 14-16 are more preferred, 14-15 are particularly preferred, and 14 is most preferred. If the number of carbon atoms is less than 14, the crystals may disappear at room temperature or may become small and the gloss may decrease, while if it exceeds 22, the crystals may be crystallized but the flaky luster of Some crystals may not be obtained.

As the above-mentioned straight chain fatty alcohol, it is preferable to use a straight chain fatty alcohol having a high purity, that is, a straight chain fatty alcohol having the same carbon number as much as possible by itself. 100 mass%
Is preferably a linear fatty alcohol having the same carbon number, more preferably 95 to 100% by mass, and even more preferably a linear fatty alcohol having the same carbon number, 98 to 100% by mass.
Is particularly preferably a straight chain fatty alcohol having the same carbon number. When the purity is less than 90% by mass, flaky lustrous crystals may not be obtained.

Therefore, it is particularly preferable that 98 to 100% by mass of the straight-chain fatty alcohol is a straight-chain fatty alcohol having 14 carbon atoms.

—Polyglycerin Fatty Acid Ester— The polyglycerin fatty acid ester is not particularly limited as long as it has at least one linear alkyl group having 8 to 12 carbon atoms, and known polyglycerin fatty acid esters are available. All are usable.

In the polyglycerin fatty acid ester, the average degree of condensation of the glycerin-derived constituents derived from the glycerin monomer is preferably 4 to 10, and more preferably 6 to 10.
Is more preferable. The average degree of condensation is within the numerical range (4
-10) Outside the range, flaky lustrous crystals may not be obtained.

In the polyglycerin fatty acid ester, the average degree of esterification is preferably 1-3.
The degree is particularly preferable. If the average degree of esterification is out of the numerical range (1 to 3), scaly crystals having gloss may not be obtained.

Examples of the polyglycerin fatty acid ester include polyglycerin octanoic acid ester, polyglycerin capric acid ester, polyglycerin lauric acid ester, and the like. Among these, polyglycerin capric acid ester is particularly preferable in that a scaly crystal having excellent gloss can be obtained. These are 1
They may be used alone or in combination of two or more.

<Content ratio (straight chain fatty alcohol / polyglycerin fatty acid ester)> The content ratio of the straight chain fatty alcohol and the polyglycerin fatty acid ester is 50. mass ratio (straight chain fatty alcohol / polyglycerin fatty acid ester). It is necessary to be 0 / 50.0 to 98.0 / 2.0, preferably 60.0 / 40.0 to 95.0 / 5.0, and 70.0 / 30.0 to 90.0 / 10. 0.0 is more preferable. If the mass ratio is less than 50.0 / 50.0, crystallization does not occur, while if it exceeds 98.0 / 2.0, hard crystals with no gloss are obtained.

<Method for producing composition for external preparation for skin> As a method for producing the composition for external preparation for skin of the present invention, for example, a composition for obtaining the linear fatty alcohol and the polyglycerin fatty acid ester is obtained. It is preferable that the substances are blended so as to be within the numerical range of the above mass ratio, and stirred and mixed. The stirring / mixing is preferably performed at about 50 to 110 ° C. using a stirrer equipped with a heater, a temperature controller, etc. After completion of stirring and mixing, it is preferable to take out at a temperature not lower than the melting point of the mixture and allow to cool.

The composition for external preparation for skin of the present invention described above is a stable external preparation having excellent pearly luster, excellent in feeling of use such as refreshing feeling and moisturizing effect, moisturizing effect, and skin care effect. It can be suitably manufactured.

[Pearlized substance] The pearlized substance of the present invention is 0.1 / 99.9 to 50 in mass ratio (composition for external agent for skin / water) of the above composition for external agent for skin and water. .0 /
50.0 contained, and optionally other components.

The mass ratio is 0.5 / 99.5.
30.0 / 70.0 is preferable, 1.0 / 99.0 to 1
0.0 / 90.0 is more preferable. When the mass ratio is 0.
When it is less than 1 / 99.9, the expression of pearl luster due to the blending of the composition for external preparation for skin may be low, while 50.
When it exceeds 0 / 50.0, the amount of the composition for external preparation for skin is too large, and similarly, the expression of pearl luster may be poor.

The water is not particularly limited and includes distilled water, ion-exchanged water, purified water, tap water and the like, and purified water and the like are preferable for practical use.

<Method for producing pearlized product> As a method for producing the pearlized product, the composition for external preparation for skin of the present invention and water are stirred and mixed at 50 to 80 ° C., and then 10 to 4
It is preferable to leave it at about 5 ° C. for 20 hours or more for production.
By producing in this way, the crystal form of higher alcohols is adjusted, and a sebum film with an excellent feel can be easily incorporated into the formulation, and a skin external preparation that does not cause quality deterioration such as coagulation and solidification and crystallization is provided. It will be possible.

During the stirring and mixing, the linear fatty alcohol, the polyglycerin fatty acid ester, and water may be stirred and mixed at the same time. The linear fatty alcohol and the polyglycerin fatty acid ester may be stirred and mixed first. Then, after the composition for external preparation for skin of the present invention is obtained, water may be further mixed and stirred, but the former is preferable in terms of production efficiency. The temperature during the leaving is preferably about 18 to 28 ° C. The time for leaving is preferably 20 to 40 hours.

The pearlized product of the present invention as described above is stable, has excellent feelings of use such as refreshing feeling, moisturizing effect, moisturizing effect, and skin care effect, and can be suitably used for producing an external preparation for skin having an excellent pearly luster. Is. In particular, since it is possible to impart an excellent pearly luster to transparent cosmetics (lotion, beauty essence, etc.), it is extremely useful for blending into transparent cosmetics. Furthermore, since the crystals contained are in the form of thin flakes, the external preparation for skin using this dissolves favorably at the body temperature of the human body at the time of use, and in particular, a feeling of use such as a refreshing feeling and a moist feeling, It is possible to easily provide an external preparation for skin having excellent moisturizing effect and skin care effect.

[External skin preparation] The external skin preparation of the present invention contains the composition for external skin preparation of the present invention in an amount of 0.1 to 50.0% by mass, and optionally other components. .

The content of the composition for external preparation for skin in the external preparation for skin is preferably 0.1 to 30.0% by mass, more preferably 0.1 to 20.0% by mass,
0.5-20.0 mass% is more preferable, and 1.0-5.
0% by weight is particularly preferred. When the content is out of the numerical range (0.1 to 50.0% by mass), stability, refreshing feeling, feeling of use such as moisturizing effect, moisturizing effect, skin care effect, and pearl luster are compatible. The skin external preparation may not be obtained.

Other components contained in the external preparation for skin of the present invention include known active ingredients, moisturizing ingredients, antibacterial / antiseptic ingredients, pigments, viscosity modifiers, which are used in various cosmetics. Appearance modifiers and the like can be mentioned. Among these, active ingredients, moisturizing ingredients and the like are particularly preferable because they can impart a pearly luster to transparent cosmetics and a suitable emollient effect to the skin.

Suitable examples of the active ingredient include water-soluble active ingredients. Specifically, vitamin C derivatives such as ascorbic acid monopalmitate and magnesium ascorbate phosphate, which are whitening ingredients, and plant extracts. Preference is given to polyphenols such as catechin, which is an antioxidant component, carotenoids, and ε-aminocaproic acid, lysozyme chloride, guaiazulene, nicotinic acid amides, calcium pantothenate, and the like, which are anti-inflammatory components. These may be used alone or in combination of two or more.

Examples of the moisturizing component include polyhydric alcohols such as glycerin and sorbitol, polysaccharides such as hyaluronic acid, and amino acids such as pyrrolidonecarboxylic acid. These may be used alone or in combination of two or more.

Examples of the antibacterial and antiseptic components include methylparaben, propylparaben, phenoxyethanol and the like. These may be used alone or in combination of two or more. Examples of the viscosity modifier, appearance modifier, and the like include water-soluble polymers such as xanthan gum, hydroxyethyl cellulose, carboxyvinyl polymer, and pearlized products such as higher fatty acid ethylene glycol. These may be used alone or in combination of two or more.

The external preparation for skin of the present invention is preferably used for cosmetics such as shampoos, conditioners, body shampoos, massage creams, as well as lotions, emulsions, beauty essences, creams for bases and the like. Particularly when used in cosmetics such as lotion and beauty essence, the pearlized product of the present invention is preferably contained in an amount of 0.1 to 99.9% by mass, and 0.1 to 30.0% by mass. Is more preferable, and it is more preferable that the content is 0.5 to 10.0% by mass.

<Method for producing external preparation for skin> Examples of the method for producing external preparation for skin include, for example, emulsification of the composition for external preparation for skin of the present invention, pearl compound, etc., at a predetermined temperature and the other components described above. The method of compounding in the thing etc. is mentioned. The temperature at the time of compounding is preferably 45 ° C. or less in that the pearl luster disappears when compounded at a temperature higher than the melting point of the linear fatty alcohol. When compounding, a paddle mixer, a disper, a homomixer, etc. are used suitably.

The above-described external preparation for skin of the present invention has stable and excellent pearly luster, even when the external preparation for skin is a highly transparent cosmetic (lotion, beauty essence, etc.). In addition, the crystals that express pearl luster are in the form of thin flakes, which dissolves favorably at the body temperature of the human body during use, resulting in a very refreshing and moisturizing feeling, moisturizing effect, and skin care effect. .

[0035]

EXAMPLES The present invention will be described in more detail below with reference to examples, but the present invention is not limited to the following examples.

(Example 1) -Production of composition for external preparation for skin-Straight chain fatty alcohol (myristyl alcohol: purity; 9)
8% by mass) and 90 parts by mass of polyglycerin fatty acid ester (polyglycerin capric acid ester (average degree of condensation:
10, the average degree of esterification: 2)) 10 parts by mass are mixed in a stirrer equipped with a heater and a temperature controller, and the temperature is raised to 80 ° C. while stirring and mixing, and this temperature is maintained for 0.5 hours. After maintaining at 1, the mixture was allowed to cool and taken out at 25 ° C to obtain the composition for external preparation for skin of the present invention.

-Production of pearlized product- 10 parts by mass of the obtained composition for external preparation for skin and 90 parts of purified water
After stirring and mixing parts by mass at 80 ° C, room temperature (24 ° C)
After standing for 24 hours, the pearlized product of the present invention was obtained.

-Manufacture of cosmetics (external preparation for skin) -Using the obtained pearlized product, external preparations for skin (cosmetics) of the present invention were manufactured as follows. 0.2% by mass of carboxyvinyl polymer (trade name: Carbopol 980)
Glycerin was added to 85 parts by mass of the aqueous solution so as to be 5% by mass, and neutralized with a predetermined amount of caustic soda. Then, the mixture is uniformly stirred at room temperature (24 ° C.), 10 parts by mass of the mixing ratio (mass ratio) of 90/10 of the pearlized product and purified water is added, and the mixture is stirred with a paddle mixer until uniform to obtain a skin external preparation. It was

<Evaluation> The obtained external preparation for skin (cosmetics) was evaluated for "stability" and "pearl luster" as follows. The results are shown in Table 1. << Evaluation of Stability >> 5 ° C., room temperature (24 ° C.), and 4
It was maintained in a constant temperature bath at each temperature of 0 ° C., and whether or not the products were separated daily was visually observed according to the following evaluation criteria to make a comprehensive evaluation. -Evaluation criteria- ・ Products are not separated and stability is high ○ ○ ・ Products are slightly separated △ △ ・ Products are clearly separated ×

<< Evaluation of Pearl Luster >> 5 ° C., room temperature (2
4 ° C.) and 40 ° C. in a constant temperature bath, and the uniformity of pearly luster was visually observed according to the following evaluation criteria with time to comprehensively evaluate. -Evaluation criteria- ・ Pearl gloss is uniform and very good ・ ・ ・ ◎ ・ Pearl gloss is uniform and good ・ ・ ・ ○ ・ Pearl gloss is not uniform ・ ・ ・ △ ・ Pearl No gloss and poor quality ... ×

Also, 10 subjects evaluated the "feeling of use" and "moisturizing effect" when applied to the face by sensory evaluation according to the following evaluation criteria. The results are shown in Table 1. << Evaluation of the feeling of use >> ・ The feeling of use is very good ... ◎ The feeling of use is good ... ○ ・ The feeling of use is not so good △: The feeling of use is bad・ × ＜＜ Moisturizing effect ＞ ・ Very high moisturizing effect ・ ・ ・ ◎ ・ High moisturizing effect ・ ・ ・ ○ ・ Not very high moisturizing effect ・ ・ ・ △ ・ Poor moisturizing effect ・ ・ ・ ×

Example 2 In the same manner as in Example 1, except that the straight-chain fatty alcohol was changed to the straight-chain fatty alcohol (cetyl alcohol) in the “production of the composition for external preparation for skin” of the first example. Composition for external preparation for skin, pearlized product,
And a skin external preparation was produced and each evaluation was performed in the same manner as in Example 1. The results are shown in Table 1.

(Example 3) In the "Production of a composition for external preparation for skin" of Example 1, the purity of linear fatty alcohol was
A composition for external preparation for skin, a pearlized product, and an external preparation for skin were produced in the same manner as in Example 1 except that the content was changed to 80% by mass, and each evaluation was performed in the same manner as in Example 1. The results are shown in Table 1.

(Example 4) A composition for external preparation for skin, a pearlized product, was prepared in the same manner as in Example 1 except that the standing time was changed to 10 hours in "Production of pearlized product" of Example 1.
And a skin external preparation was produced and each evaluation was performed in the same manner as in Example 1. The results are shown in Table 1.

(Comparative Example 1) In Example 1, "Production of a composition for external preparation for skin", except that the linear fatty alcohol was replaced with a linear fatty alcohol (lauryl alcohol),
In the same manner as in Example 1, the composition for external preparation for skin, pearlized product, and external preparation for skin of Comparative Example 1 were produced, and each evaluation was performed in the same manner as in Example 1. The results are shown in Table 1.

[0046]

[Table 1]

[0047]

According to the present invention, stable, refreshing feeling,
A composition for external preparations for skin and a pearlized product, which are excellent in a feeling of use such as moisturizing effect, a moisturizing effect, and a skin care effect, and which can preferably produce an external preparation for skin having an excellent pearly luster, and a stable composition using these compositions. It is possible to provide a skin external preparation having excellent feeling of use such as refreshing feeling and moisturizing effect, moisturizing effect and skin care effect, and having excellent pearly luster.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) A61K 9/10 A61K 9/10 47/10 47/10 47/14 47/14 A61P 17/16 A61P 17 / 16 F term (reference) 4C076 AA08 AA09 AA13 AA17 AA23 BB31 CC18 DD37A DD37X DD46A DD46X FF36 FF57 4C083 AB032 AB051 AB052 AC071 AC072 AC122 AC421 AC422 AD092EE01EE02 DD01 DD02 DD01 DD02 DD01 DD02 DD01 DD02 DD01 DD02 DD01 DD02

Claims (10)

[Claims] 1. A mass ratio of a straight chain fatty alcohol having 14 to 22 carbon atoms and a polyglycerin fatty acid ester having at least one straight chain alkyl group having 8 to 12 carbon atoms (direct ratio). (Chain fatty alcohol / polyglycerin fatty acid ester) 50.0 / 50.0-
A composition for external preparation for skin, which contains 98.0 / 2.0. 2. 90 to 10 in a straight chain fatty alcohol
The composition for external preparation for skin according to claim 1, wherein 0% by mass is a linear fatty alcohol having the same carbon number. 3. 98 to 10 in a straight chain fatty alcohol
The composition for external skin preparation according to claim 1 or 2, wherein 0% by mass is a linear fatty alcohol having 14 carbon atoms. 4. The polyglycerin fatty acid ester having a linear alkyl group, wherein the glycerin-derived component derived from the glycerin monomer has an average degree of condensation of 4 to 10. Composition for external preparation for skin. 5. The composition for external preparation for skin according to claim 1, wherein the glycerin fatty acid ester having a linear alkyl group has an average degree of esterification of 1 to 3. 6. The polyglycerin fatty acid ester having a linear alkyl group is at least any one of polyglycerin octanoic acid ester, polyglycerin capric acid ester, and polyglycerin lauric acid ester. A composition for external skin preparations. 7. A composition for external preparation for skin according to any one of claims 1 to 6 and water in a mass ratio (composition for external preparation for skin / water) of 0.1 / 99.9 to 50.0. A pearlized product characterized by containing /50.0. 8. The composition for external preparation for skin according to any one of claims 1 to 6 and water are stirred and mixed at 50 to 80 ° C., and then left standing at 10 to 45 ° C. for 20 hours or more to obtain The pearlized product according to claim 7. 9. An external preparation for skin, comprising 0.1 to 50.0% by mass of the composition for external preparation for skin according to claim 1. 10. The external preparation for skin according to claim 9, which comprises 0.1 to 99.9% by mass of the pearlized product according to claim 7 or 8 and is used in cosmetics.