JP2002145733A - Solid water-in-oil type emulsion cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water-in-oil type emulsion cosmetic in hard gel to solid shape, having improved stability, and improved sense of use such as heavy touch in spreading, stickiness and oiliness. SOLUTION: This solid water-in-oil type emulsion cosmetic is prepared by mixing the following crosslinking type polyether-modified silicone (A) with the following fatty acid ester (B) of dextrin and other cosmetic components, and regulating the content of water so as to be >=50 wt.%: (A): one or more kinds of the cross-linking type polyether-modified silicone of the structural formula (I) (l is 3-20; m is 10-200; and n is 1.0-10.0); and (B): one or more kinds of the fatty acid esters of the dextrin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a solid water-in-oil type emulsified cosmetic, and more particularly, to a hardened emulsion having improved stability and usability such as weight, stickiness and oiliness. Gel-like
The present invention relates to a solid water-in-oil emulsion cosmetic.

[0002]

2. Description of the Related Art There are various types of emulsifying bases such as an oil-in-water type, a water-in-oil type and a composite type. ), And lacks novelty and uniqueness. Among them, it is known that a water-in-oil type cream is superior to the oil-in-water type cream in terms of the protective effect, softening effect, moisturizing effect, and the like of the base or the skin of the base.

[0003]

However, on the other hand, water-in-oil creams are generally preferred because of their drawbacks such as stability over time, heavy spread, stickiness, and greasyness. Therefore, development of a product that corrects these drawbacks has been desired.

In view of such circumstances, the present inventors have made intensive studies on a solid water-in-oil type emulsified cosmetic, and as a result, have found that a specific three-dimensionally crosslinked polyether-modified silicone, a dextrin fatty acid ester and water are emulsified and dispersed. As a result, it has been found that the composition has a hard gel state or a solid state, and the stability with time, the weight of spread, the stickiness, the oiliness, and the like are remarkably reduced, and the present invention has been completed.

Accordingly, the present invention relates to a so-called solid water-in-oil type emulsified cosmetic, which comprises emulsifying and dispersing a specific three-dimensionally cross-linked polyether-modified silicone, a dextrin fatty acid ester and water, to thereby provide stability over time, and It is an object of the present invention to provide a solid water-in-oil type emulsified cosmetic which is excellent in usability, in which the weight, stickiness, oiliness and the like of the spread are remarkably reduced.

[0006]

According to the present invention, there is provided a solid water-in-oil type emulsified cosmetic which solves the above-mentioned problems. The cosmetic comprises the following crosslinked polyether-modified silicone (A). And the following dextrin fatty acid ester (B), and the content of the aqueous phase component is 50% by weight.
The above is the feature.

(A) One or more cross-linked polyether-modified silicones of the following structural formula (I): (B) One or more dextrin fatty acid esters. [However, in the structural formula (I), 1 is 3 to 20, m is 1
0 to 200, n is 1.0 to 10.0. ]

[0008]

Embedded image

The solid water-in-oil type emulsified cosmetic of the present invention emulsifies and disperses a specific three-dimensionally crosslinked polyether-modified silicone, a dextrin fatty acid ester and water. In addition, the weight, stickiness, greasyness and the like of the spread are remarkably reduced, and the usability is excellent. In order to improve the usability, the content of the dextrin fatty acid ester of the component (B) is desirably in the range of 0.1 to 3.0% by weight.

An embodiment of the present invention will be described below. The solid water-in-oil emulsified cosmetic in the present invention,
It refers to a water-in-oil (W / O type) emulsified cosmetic in which the content of the water phase component is 50.0% by weight or more of all components, and the water phase component is dispersed in a continuous phase oil phase component. . Specific cosmetics include, for example, hard gel or solid products, such as skin creams, hair creams, solid foundations, eyeliners, mascaras, and eye shadows, that is, solid products. Is not limited to these examples, and falls under the cosmetic of the present invention as long as it is the above-mentioned solid water-in-oil emulsion cosmetic.

The cross-linked polyether-modified silicone used in the present invention is a polymer obtained by cross-linking methyl hydrogen polysiloxane with diallyl polyethers at both ends. The method can be carried out according to the method described in, for example, Japanese Unexamined Patent Publication No. 5-140320. In the present invention, a product produced thereby can be used, or a commercially available product may be used.

As the cross-linked polyether-modified silicone, it is preferable to use a paste-form polyether-modified silicone composition previously kneaded with a silicone oil under a shearing force. And silicone oil or the like as a cosmetic ingredient. It is also possible to mix and knead the crosslinked polyether-modified silicone oil and silicone oil or the like, if necessary, with other cosmetic ingredients.

In using the crosslinked polyether-modified silicone of the structural formula (I) in the present invention, 1 is 3
~ 20 is preferred. If it is less than 3 and deviates from this range, the paste composition obtained by kneading the crosslinked polyether-modified silicone and silicone oil under a shearing force has poor emulsifiability of water. Swelling property is not sufficient, which is not preferable.

M is preferably from 10 to 200, and 1
If it is less than 0, it does not swell sufficiently with respect to the silicone oil,
If it exceeds 200, the paste-like polyether-modified silicone composition obtained by kneading with silicone oil under a shearing force becomes poor in emulsifiability of water. N is 1.0 to 1
0.0 is preferable, and when it is smaller than 1.0, a three-dimensional structure cannot be formed, and a kneading treatment with silicone oil does not result in a paste-like substance, and the emulsifiability of water is poor. Conversely, if it exceeds 10, the crosslink density of the three-dimensional structure becomes too high, so that the silicone oil cannot be retained even when kneaded with the silicone oil, and a stable paste-like substance is not obtained.

In the present invention, the silicone oil to be kneaded with the crosslinked polyether-modified silicone is not particularly limited, and may be linear or branched. Although possible, a low-viscosity silicone oil having a viscosity at 25 ° C. of 100 mPa · s or less can be preferably used.

Specific silicone oils that can be used include:
Cyclic dimethylpolysiloxane such as methylpolysiloxane, methylphenylpolysiloxane, ethylpolysiloxane, ethylmethylpolysiloxane, ethylphenylpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and the like. You may mix and use more than one kind.

The mixing ratio of the cross-linked polyether-modified silicone and the silicone oil is such that the silicone oil is added to 100 parts by weight of the cross-linked polyether-modified silicone.
The amount is preferably 0 to 1000 parts by weight, and more preferably 20 to 500 parts by weight. If the amount of the cross-linked polyether-modified silicone is less than the above range, a stable and good gel structure cannot be maintained. If the amount exceeds the above range, the weight may be felt on the skin and the usability (feel of use) may be reduced. It is not preferable because it deteriorates. The apparatus for performing the kneading treatment under a shearing force is not particularly limited, and a commonly used apparatus can be used. For example, a three-roll mill can be preferably used.

The compounding amount of the crosslinked polyether-modified silicone used in the present invention is preferably 0.1 to 10.0% by weight based on the total amount of the cosmetic. If it is less than 0.1% by weight, the aqueous phase component of 50.0% by weight or more of the internal phase cannot be emulsified. Conversely, if it exceeds 10.0% by weight, the spreadability is poor.
The feeling of use becomes heavy, which is not preferable. When the crosslinked polyether-modified silicone is blended as a paste-like polyether-modified silicone composition, the amount thereof is preferably selected so that the amount of the crosslinked polyether-modified silicone therein falls within the above range. Good.

Next, the dextrin fatty acid ester which is another essential component of the present invention will be described. The dextrin fatty acid ester used in the present invention is obtained by reacting dextrin and fatty acid chloride in pyridine. Dextrin, coconut oil fatty acid dextrin, dextrin laurate, dextrin palmitate / octanoate and the like are known.

The amount of the dextrin fatty acid ester to be added to the cosmetic is 0.1 to 0.1% based on the total amount of the cosmetic.
It is good to mix at 3.0% by weight. If it is less than 0.1% by weight, which is out of the range, problems such as a decrease in hardness or viscosity and water separation may occur in stability over time. The feeling is bad and the feeling of use is heavy, which is not preferable.

In the emulsified cosmetic of the present invention, in addition to the above-mentioned essential components, oils usually mixed in the emulsified cosmetic can be of course compounded within a range that does not impair the uniformity of the oil phase. For this purpose, any of natural animal and vegetable oils and synthetic oils can be used in addition to the components (A) and (B). As the oil agent, specifically, liquid paraffin, liquid such as squalane, paste or solid hydrocarbon, wax,
Examples include higher fatty acids, higher alcohols, esters, glycerides, silicone oils and the like.

In the emulsified cosmetic of the present invention, the oil phase component is contained in the cosmetic in an amount of from 10% by weight to 50% by weight based on the total amount of the cosmetic.
It is blended in a range of less than weight%. If it is less than 10% by weight,
It is difficult to make water-in-oil type cosmetics, 50% by weight
If the above amount is blended, the amount of water in the internal phase becomes too small and lacks moistness in terms of use feeling, which is not preferable. In addition, as the component corresponding to "O" in the W / O type emulsified cosmetic, there are all oily components such as natural animal / vegetable oil, synthetic oil and the like contained in the cosmetic, and are essential in the present invention. The crosslinked polyether-modified silicone composition and dextrin fatty acid ester, which are the components, are also oil phase components corresponding to “O”.

The water phase component such as water mixed with the oil phase component in the high internal water phase oil-in-oil emulsified cosmetic composition of the present invention, that is, "W" means water-soluble components such as water and ethanol and a thickener. Compounds are applicable. In the present invention, the amount of the aqueous phase component is from 50% by weight to less than 90% by weight based on the total amount of the cosmetic. The blending amount is preferably 60% by weight or more in water itself, and by doing so, a moist feeling can be imparted, which is preferable. If the amount of the aqueous phase component is less than 50% by weight, the characteristic of water is hardly exhibited and lacks moist feeling. Conversely, if the content is 90% by weight or more, it is difficult to obtain a water-in-oil type.

The emulsified cosmetic of the present invention may contain, in addition to the above-mentioned essential components, aqueous and oily components which are usually incorporated in emulsified cosmetics. Examples thereof include humectants and preservatives. , Antioxidants, UV absorbers,
There are beauty ingredients, fragrances, fragrances, thickeners, color pigments, photovoltaic pigments, organic powders, hydrophobized pigments, tar pigments, etc.
They can be blended within a range that does not impair the effects of the present invention.

Specific examples of the high internal water phase water-in-oil emulsion cosmetic composition of the present invention include, as described above, emulsions, skin creams, hair creams, solid foundations, eye liners, mascaras, eye shadows and the like. Milky, creamy or solid products of the above. The production of these products can be carried out by a conventional method using the above-mentioned essential components and the components usually blended in cosmetics.

[0026]

The present invention is described below with reference to a plurality of examples and comparative examples. However, the present invention is not limited to these examples and comparative examples, but is defined by the appended claims. Needless to say.

[Examples 1 to 5 and Comparative Examples 1 to 3] Regarding water-in-solid type emulsified cosmetics, Examples 1 to 5 of compositions corresponding to the present invention and Comparative Examples of compositions not corresponding to the present invention 1 to 3 were prepared, and a stability test (appearance observation, hardness measurement) and a female professional panel (1
0), and the performance was evaluated. Each test method and evaluation criteria are as follows.

(1) Stability test (observation of appearance) After leaving for 1 month in a constant temperature layer at 50 ° C, taking out after 1 month,
After returning to room temperature, the appearance was evaluated. [Evaluation Criteria of Stability] み: No separation is observed at all △: Almost no separation is observed ×: Separation of liquid phase (oil phase or aqueous phase) occurs

(2) Stability test (hardness measurement) Using a card meter (manufactured by I-Techno Engineering Co., Ltd.), the hardness 3 hours after the production was measured (diameter: 8 m).
m, speed; 6 cm / min, depth; 2 cm, temperature; 30 ° C.)

(3) Actual use test Usability (feel of use) was evaluated by a panel specializing in women (10 persons). The evaluation criteria are as follows. [Evaluation Criteria for Usability] ○: 7 or more people are moist, moist, non-greasy, judged to be good usability Δ: 3 to less than 7 people are moist, moist, non-greasy, good usability Judgment ×: Less than 2 people were moist, moist, non-greasy and judged good in usability

The three-dimensionally crosslinked polyether-modified silicone composition used in this test is as follows. That is, it relates to a cross-linked polyether-modified silicone and relates to l, m, n in the aforementioned structural formula (I).
Are l = 5 to 15, m = 20 to 100, n = 1.
100 parts by weight of the modified silicone and methylpolysiloxane 400 having a viscosity of 6 mPa · s.
Parts by weight under a shearing force to form a paste.

[Preparation of Skin Cream] The preparation of the skin creams of Examples 1 to 5 and Comparative Examples 1 to 3 used in this test is as follows. The components used in each example and each comparative example are as shown in Table 1.

[0033]

[Table 1]

<Production of Examples 1 to 5 and Comparative Examples 1 and 2>
(8) to (10) are dissolved in (1) to (3) heated to 70 ° C., and then (4) is mixed. While stirring the mixed oil phase with a high-speed stirrer (disper), the mixed aqueous phase of (11) and (12) in which (13) and (14) were dissolved was gradually added thereto at room temperature, and the desired solid state was obtained. A skin cream was obtained.

<Production method of Comparative Example 3> (1), (2),
(3), (5) to (8) are heated to 70 ° C. and uniformly dissolved. Then, while stirring the uniformly dissolved oil phase with a high-speed stirrer (disper), the mixed aqueous phase of (11) to (14), which was previously heated and uniformly dissolved at 70 ° C., was gradually added at room temperature. To obtain the desired W / O-type emulsified solid cream.

[Performance Test Results] The performance test results are shown in Table 1 above.
As shown in FIG. That is, for the skin creams of Examples 1 to 5, the stability was good and the stability was good. That is, all of the skin creams of the examples had no oil-water separation even after being left at 50 ° C. for one month, and had good stability over time. In contrast, the skin cream of the comparative example is △
× indicates that the stability with time is inferior. As for the hardness, the skin cream of the example is 7 to 89.
It can be seen that all are in the range of hard gel to solid and have excellent stability. In this regard, the same applies to the skin cream of the comparative example, and there is no difference from that of the example.

With respect to the usability, the skin creams of Examples 1 to 4 in which the content of dextrin palmitate, which is a dextrin fatty acid ester, is in a desirable range, are all good, that is, spread when applied to the skin. However, the skin cream of Example 5 which is out of the range is inferior in that point.

Example 5 Body Cream Compounding Amount (%) (1) Liquid Paraffin 6.0 (2) Decamethylcyclopentasiloxane 10.0 (3) 1,3-butylene glycol 3.0 (4) Paste Polyether-modified silicone composition ^{* 1} 2.5 (5) Dextrin stearate 1.0 (6) Deionized water 71.1 (7) Sodium chloride 3.0 (8) Paraben 0.2 (9) Antioxidant Agent 0.1 (10) Ethanol 3.0 (11) Fragrance 0.1 (* 1: In structural formula (I), l = 3 to 10, m = 50, n
(100 parts by weight of a crosslinked polyether silicone of 2.5 to 4 kneaded with 500 parts by weight of decamethylcyclopentasiloxane under shearing force)

<Production method and evaluation results>
Heat to 0 ° C., dissolve (5), then mix (4). Next, the aqueous phase in which (3), (6) to (11) were mixed, stirred and dissolved was gradually added at room temperature to the oil phase with stirring using a high-speed stirrer (disper) to obtain the desired body cream. Was. The obtained body cream is solid and has the same usability as in Examples 1 to 4, that is, when applied to the skin, it gives moisture, has a moist feeling, and is not sticky and stable. Good (○) was obtained.

Example 6 Hair Styling Cream Compounding Amount (%) (1) Isoparaffin 3.0 (2) Dimethylpolysiloxane (500 mPa · s) 5.0 (3) Glycerin 5.0 (4) Paste Poly 2. Ether-modified silicone composition 1.5 [Same as in Table 1] (5) Paste-form polyether-modified silicone composition ^{* 2} 1.5 (6) Dextrin myristate 2.5 (7) Acrylic resin alkanolamine liquid 0 [trade name: Plus Size L-53P, manufactured by Kyogo Chemical Co., Ltd.] (8) Ion-exchanged water 68.3 (9) Ethanol 8.0 (10) Polyethylene glycol (molecular weight 10,000) 2.0 (11) Paraben 0.1 (12) Fragrance 0.1 (* 2: In structural formula (I), l = 10, m = 30 to 70,
(100 parts by weight of a crosslinked polyether silicone having n = 3 to 5 are kneaded with 300 parts by weight of methylphenylpolysiloxane under shearing force)

<Production method and evaluation results>
Heat to 0 ° C. to dissolve (6) and then mix (5) to prepare an oil phase in advance. Next, (3), (7)-
The aqueous phase obtained by mixing, stirring and dissolving (12) is gradually added to the oil phase with stirring using a high-speed stirrer (disper) at room temperature.
The desired hair styling cream was obtained. The obtained hair styling cream is solid and has good usability, that is, when applied to hair, it gives moisture and luster, has a moist feeling, and is not sticky and has good stability (○ )

Example 7 W / O Emulsion Type Foundation Compounding Amount (%) (1) Squalane 1.0 (2) Dimethylpolysiloxane (6 mPa · s) 3.0 (3) Propylene glycol 2.5 (4) ) Paste polyether-modified silicone composition ^{* 3} 3.5 (5) Dextrin laurate 0.5 (6) Ion-exchanged water 70.1 (7) Ethanol 1.0 (8) Sodium glutamate 1.5 (9) Potassium chloride 1.5 (10) Paraben 0.1 (11) Titanium dioxide treated with dextrin palmitate 5.0 (12) Mica treated with dextrin palmitate 5.0 (13) Talc treated with dextrin palmitate 2.5 (14) Palmitin Acid dextrin-treated iron oxide 2.5 (15) Dibutylhydroxytoluene 0.1 (16) Fragrance 0.2 (* 3: In structural formula (I), l = 7, m = 50, n = 40
100 parts by weight of the crosslinked polyether-modified silicone of
Kneaded with 50 parts by weight of octamethylcyclotetrasiloxane under shearing force)

<Production method and evaluation results>
Heat to 0 ° C. to dissolve (5), (15), then
(4), (11) to (14) are mixed to prepare an oil phase in advance. Next, the aqueous phase in which (3), (6) to (10), and (16) are dissolved is gradually added to the oil phase at room temperature while stirring using a high-speed stirrer (disper), and the desired emulsifying type Got a foundation. The resulting emulsified foundation is
In a solid state, the usability is ○, that is, when applied to the skin, it gives moisture and has a moist feeling,
Moreover, it was not sticky and had good stability (（).

[0044]

According to the present invention, by combining one or more of the above paste-like polyether-modified silicone compositions with one or more selected from the group consisting of dextrin fatty acid esters, Excellent in stability over time, a solid water-in-oil type cosmetic can be provided, and by specifying the blending amount of the dextrin fatty acid ester in a desired range, the skin and hair are given moisture, It is possible to provide a moist, non-sticky material having good usability. As described above, the present invention has an excellent effect of being able to provide a solid water-in-oil type cosmetic having excellent stability over time and excellent usability.

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Claims (4)

[Claims] 1. A solid material comprising the following crosslinked polyether-modified silicone (A) and the following dextrin fatty acid ester (B), and having an aqueous phase component content of 50% by weight or more. Water-in-oil emulsion cosmetics. (A) One or more kinds of crosslinked polyether-modified silicones of the following structural formula (I). (B) One or more dextrin fatty acid esters. [However, in the structural formula (I), 1 is 3 to 20, m is 1
0 to 200, n is 1.0 to 10.0. ] 2. The crosslinked polyether-modified silicone of the structural formula (I) is a paste-like polyether-modified silicone composition kneaded with a silicone oil under a shearing force. The solid water-in-oil type emulsified cosmetic according to claim 1, wherein the ratio of the crosslinked polyether-modified silicone to the silicone oil is 100 parts by weight to 10 to 1000 parts by weight. 3. The content of the component (A) is from 0.1 to 10.0.
The solid water-in-oil type emulsion cosmetic according to claim 1 or 2, wherein the content of the component (B) is 0.1 to 3.0% by weight. 4. The solid water-in-oil emulsion cosmetic according to any one of claims 1 to 3, wherein the content of the aqueous phase component is 60.0% by weight or more.