JPH10226626A - Sericin-coated powder and cosmetic obtained by formulating the same powder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain powder having adequate gloss and transparency, excellent in effect hiding morphologic defects of skin, e.g. creases, pores of the skin or coarse texture, having smooth surface and good slip, hardly causing physical irritation on skin, having good moisture retention, supplying water content to skin, having touch feeling providing moist feeling and obtain a cosmetic in which the powder is formulated. SOLUTION: This sericin-coated powder is obtained by applying sericin and its hydrolyzate to the surface. This cosmetic is obtained by compounding sericin- coated powder. The sericin and the hydrolyzate contain 20-40mol% serine and is excellent in water soluble property. Therefore, the sericin and the hydrolyzate are excellent in miscibility with other components and maintain stable properties as an aqueous solution and is free from irritation and sensitization to skin and excellent in safety.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has an excellent effect of hiding morphological defects of the skin such as wrinkles, pores, and roughness while having a moderate gloss and transparency, has a smooth surface, and has a smooth surface. TECHNICAL FIELD The present invention relates to a powder which is good in physical stimulation on the skin, has a good moisturizing property, replenishes moisture to the skin, and gives a moist feeling, and a cosmetic containing the same.

[0002]

2. Description of the Related Art Conventionally, makeup containing cosmetics such as titanium dioxide which is a white pigment has been mainly used for concealing morphological defects such as wrinkles, pores and texture of skin.

However, such a titanium dioxide makeup cosmetic has an effect on pigmentation such as spots and freckles, but has little effect on morphological defects, and conversely the defects are conspicuous. Sometimes In addition, since it is thick, a natural finish cannot be obtained, which often causes a problem.

[0004] On the other hand, as a method of hiding morphological defects, cosmetics containing various diffuse reflection type powders are known (Japanese Patent Application Laid-Open No. 60-228406). However, cosmetics containing these powders have problems that the skin is easy to dry, and that the surface of the powder is severely uneven, so that it is likely to cause physical irritation.

[0005] Further, powder cosmetics such as powder-type or cake-type foundations, eye colors, teak colors and the like are generally stored in compact containers.
It is the most widely used in Japan because it is convenient to carry and can easily and hygienically make up with a built-in sponge. These powder cosmetics are generally prepared by treating the surface of a powder such as an extender pigment, a white pigment, or a color pigment with a binder such as an oil agent or a surfactant and compressing and solidifying the surface. In other words, powder occupies most of the cosmetic ingredients,
Water is not incorporated or is limited to very small amounts, if any.

Accordingly, in order to improve the moist feeling of such powder cosmetics, emollients are blended, or powders coated with a highly moisturizing substance such as collagen, hyaluronic acid, amino acid derivatives or the like by mechanochemical methods or the like are used. (Japanese Patent Application Laid-Open Nos. 61-69710 and 61-282).
307 and 62-12709), and attempts have been made to impart moisturizing properties to powder cosmetics. Recently, a blend of a pigment coated with one or more monoacyl-type phospholipids has been proposed (Japanese Patent Application Laid-Open No. 5-255042).

However, when an emollient agent is used, it is necessary to add a considerably large amount in order to obtain a sufficient moist feeling, so that the oily feeling of the cosmetic becomes strong, which causes discomfort due to stickiness and poor durability of the makeup. Tended to be.

[0008] Regarding the formulation of powder coated with a water-retaining material, most of the conventional water-retaining materials themselves do not have a very high water-retention capacity. Has the disadvantage of absorbing water in the outside air and giving a sticky unpleasant feeling of use under high humidity.

[0009]

DISCLOSURE OF THE INVENTION The present invention overcomes the above-mentioned problems, masks the morphological defects of the skin, and furthermore, has less physical irritation on the skin, and has good moisture retention, and this powder. It is an object of the present invention to provide a cosmetic composition which is excellent in wrinkle hiding effect, moisturizing property and low in irritation.

[0010]

Means for Solving the Problems As a result of intensive studies to solve the above-mentioned problems, as a result of covering the powder surface with sericin and its hydrolyzate, the morphological defects of the skin are hidden, and the The present invention succeeded in obtaining a powder having little physical irritation and good moisturizing properties, and completed the present invention.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Sericin and its hydrolyzate used for coating powder in the present invention are eluted by partially hydrolyzing sericin contained in silkworm cocoons or raw silk in an alkaline aqueous solution or by enzymatic treatment. Can be used.
Further, the eluate is adjusted to pH 3 with an organic acid or an inorganic acid.
It may be adjusted to ~ 5, or mixed with a water-soluble organic solvent such as methanol, ethanol, dioxane or the like to precipitate a sericin hydrolyzate, filtered, dried and powdered. Further, sericin and its hydrolyzate used in the present invention have an average molecular weight of about 10,000 to 20,000.
And those containing 20 to 40 mol% of serine are particularly preferable.

In the coating treatment of sericin and its hydrolyzate on the powder surface, sericin and its hydrolyzate are dissolved in a solvent such as water, the powder to be coated is added, mixed, stirred, and dried. It can be performed by removing the solvent. Alternatively, after coating the surface of the powder, sericin is fixed to the powder surface by a denaturing treatment with formalin or glutaraldehyde, a treatment by a chromium method, or a tannic acid treatment. Alternatively, the powder, sericin and its hydrolyzate powder can be mixed by a mechanochemical technique and coated on the surface.

Examples of the powder to be coated with sericin and its hydrolyzate include extender pigment powders such as talc, kaolin, mica, sericite, light magnesium carbonate, light calcium carbonate, magnesium sulfate, and silicic anhydride, and titanium oxide. , Zinc oxide, etc., white pigment powder, red iron oxide, yellow iron oxide,
Inorganic color pigment powders such as black iron oxide, chromium oxide, chromium hydroxide, ultramarine, konjo, pearlescent pigment powders such as mica titanium, and organic pigment powders such as nylon powder, polystyrene powder, and polyethylene powder. be able to.

The coating amount of sericin and its hydrolyzate on the powder surface of the present invention is preferably 0.05 to 10.0% by weight, particularly preferably about 0.2 to 5% by weight. 0.05%
Below, a powder surface modification effect cannot be obtained, and when it is 10% by weight or more, no remarkable difference is observed in the effect.

The powder coated with sericin and its hydrolyzate obtained in the present invention is blended into a cosmetic. The blending amount is arbitrarily selected according to the properties of the cosmetic, but is 0.1 to 100% by weight based on the total weight of the cosmetic component. In addition, in order to hide the morphological defects of the skin, to exert less physical irritation on the skin, and to exhibit good moisturizing properties, it is desirable that the content is 5% by weight or more. The upper limit is not particularly limited.

As a cosmetic compounding a powder coated with sericin or a hydrolyzate thereof, it can be widely used in cosmetics using pigments, and can be used as a liquid foundation, an oily powder foundation, a powder type or a two-way type cake type foundation. , Stick foundation, face powder, lipstick, blusher, eyeshadow, eyebrow, mascara, etc., and other body powders, antiperspirants, sunscreen creams, sunscreen emulsion, carmine lotion, whitening powder, emulsion , Lotion and the like.

[0017]

EXAMPLES Further, the present invention will be described in more detail with reference to examples.

Example 1 Hydrolyzed Sericin-Coated Talc Talc was immersed in a 5% by weight hydrolyzed sericin aqueous solution, centrifuged, and the residue was dried at 70 ° C. The coating amount of hydrolyzed sericin in this talc was 1.0% by weight.

[Example 2] Sericite coated with hydrolyzed sericin In the same manner as in Example 1, the surface of sericite was coated with hydrolyzed sericin.

Example 3 After hydrolyzed sericin-coated mica mica was immersed in 5% by weight hydrolyzed sericin, sericin was insolubilized by adding tannic acid. After washing with water, filtration and drying, the mica surface was coated with hydrolyzed sericin.

Example 4 Titanium oxide coated with hydrolyzed sericin In the same manner as in Example 3, the surface of titanium oxide was coated with hydrolyzed sericin.

[Example 5] Hydrolyzed sericin-coated bengalara In the same manner as in Example 1, the bengala surface was coated with hydrolyzed sericin.

Example 6 Hydrolyzed sericin-coated yellow iron oxide In the same manner as in Example 1, the surface of the yellow iron oxide was coated with hydrolyzed sericin.

[Example 7] Hydrolyzed sericin-coated black iron oxide In the same manner as in Example 1, the surface of the black iron oxide was coated with hydrolyzed sericin.

Example 8 Hydrolyzed Sericin-Coated Titanium Mica As in Example 1, the surface of titanium mica was coated with hydrolyzed sericin.

Example 9 Sericin-Coated Nylon Powder Nylon powder (490 g) and sericin (10 g) were charged into a raikai machine, lykai treatment was performed for 5 hours, and the surface of the nylon powder was coated with sericin.

Example 10 Polystyrene Powder Coated with Sericin In the same manner as in Example 3, the surface of the polystyrene powder was coated with hydrolyzed sericin.

Example 11 Sericin-Coated Fine Particle Titanium Oxide In the same manner as in Example 3, the surface of the fine particle titanium oxide was coated with hydrolyzed sericin.

Example 12 Powder Foundation (1) Coated Bengala (Example 5) 3.0 (% by weight) (2) Coated Yellow Iron Oxide (Example 6) 2.5 (3) Coated Black Iron oxide (Example 7) 0.5 (4) Coated nylon powder (Example 9) 10.0 (5) Coated titanium oxide (Example 4) 10.0 (6) Coated mica (Example 3) 20.0 (7) Coated talc (Example 1) 43.7 (8) Liquid paraffin 5.0 (9) Octyldodecyl myristate 2.5 (10) Vaseline 2.5 (11) Methyl paraoxybenzoate 0.1 (12) Fragrance 0.2 Production method: (1) to (7) are mixed, pulverized and transferred to a high-speed blender. (8) to (12) are mixed and added, and mixed uniformly. This is pulverized, sieved through a sieve, filled in a metal plate and compression molded.

Example 13 Solid teak color (1) Coated talc (Example 1) 59.7 (% by weight) (2) Coated sericite (Example 2) 20.0 (3) Coated oxidation Titanium (Example 4) 4.0 (4) Zinc stearate 5.0 (5) Rice starch 5.0 (6) Colorant 3.0 (7) Liquid paraffin 3.0 (8) Methyl paraoxybenzoate 0 1 (9) Fragrance 0.2 Production method: (1) to (6) are uniformly mixed and colored. (7)
(9) is added by spraying, uniformly mixed, sieved through a sieve, filled in a metal dish and compression-molded.

Example 14 Cake Type Eye Color (1) Coated talc (Example 1) 47.7 (% by weight) (2) Coated mica (Example 3) 15.0 (3) Magnesium carbonate 1 0.0 (4) Zinc stearate 10.0 (5) Coated titanium oxide (Example 4) 5.0 (6) Colorant 15.0 (7) Sorbitan sesquioleate 1.0 (8) Liquid paraffin 4 0.0 (9) Lanolin 1.0 (10) Methyl parahydroxybenzoate 0.1 (11) Fragrance 0.2 Production method: (1) to (6) are uniformly mixed and colored. (7)
Add (11) and mix uniformly. This is pulverized, sieved through a sieve, filled in a metal plate and compression molded.

Example 15 Cake-Type Eye Color (1) Coated titanium mica (Example 8) 35.0 (% by weight) (2) Coated talc (Example 1) 23.7 (3) Coated Mica (Example 3) 10.0 (4) Zinc stearate 5.0 (5) Zinc laurate 3.0 (6) Colorant 15.0 (7) Hexadecyl myristate 5.5 (8) Lanolin fatty acid isopropyl 2.5 (9) Methyl paraoxybenzoate 0.1 (10) Fragrance 0.2 Production method: Mix (2) to (6), pulverize and transfer to a high-speed blender. (7) to (9) are mixed and added to this, and mixed uniformly. After this is pulverized, the components (1) and (10) are added and mixed. After sieving through a sieve, the mixture is filled in a gold plate and compression molded.

Example 16 Powdering (1) Coated talc (Example 1) 60.8 (% by weight) (2) Coated sericite (Example 2) 17.0 (3) Calcium carbonate 0 (4) Zinc oxide 10.0 (5) Magnesium stearate 3.0 (6) Colorant 4.0 (7) Fragrance 0.2 Manufacturing method: (1) to (7) were uniformly mixed by a high-speed blender. Thereafter, a pulverizing process is performed. Granulate through a sieve and fill into containers.

Example 17 Solid Powder (1) Coated talc (Example 1) 40.7 (% by weight) (2) Coated mica (Example 3) 20.0 (3) Coated polystyrene powder ( Example 10) 10.0 (4) Zinc oxide 15.0 (5) Magnesium stearate 3.0 (6) Rice starch 2.0 (7) Colorant 4.0 (8) Liquid paraffin 3.5 (9) ) Isopropyl myristate 1.5 (10) Methyl paraoxybenzoate 0.1 (11) Fragrance 0.2 Production method: Mix (1) to (7), pulverize and transfer to a high-speed blender. Mix and add (8) to (11) and mix uniformly. This is pulverized, sieved through a sieve, filled in a metal plate and compression molded.

Example 18 Baby Powder (1) Coated talc (Example 1) 80.0 (% by weight) (2) Coated nylon powder (Example 9) 20.0 Production methods: (1) and ( 2) is mixed and pulverized into a product.

[Example 19] Emulsion foundation (1) Stearic acid 2.4 (wt%) (2) Propylene glycol monostearate 2.0 (3) Cetostearyl alcohol 0.2 (4) Liquid lanolin 0 (5) Liquid paraffin 3.0 (6) Isopropyl myristate 8.5 (7) Sodium carboxymethylcellulose 0.2 (8) Bentonite 0.5 (9) Propylene glycol 4.0 (10) Triethanolamine 1. 1 (11) Purified water 55.5 (12) Fragrance 0.1 (13) Coated titanium oxide (Example 4) 8.0 (14) Coated talc (Example 1) 6.5 (15) Coated Bengala (Example 5) 3.0 (16) Coated yellow iron oxide (Example 6) 2.5 (17) Coated black iron oxide (Example 7) 0.5 Manufacturing method: (13) to (17) After mixing, the powder is crushed by a crusher. (11) is heated to 70 ° C., and (8) is added to swell well. To this is added (7) previously dispersed in (9), and then (10) is added and dissolved. The oil phases (1) to (6) are mixed, heated and melted to 80 ° C. The pigment is added to the aqueous phase with stirring, the mixture is heated to 75 ° C. through a colloid mill, and the oil phase is added with stirring to emulsify.
Add (12) at ° C.

Example 20 Stick Foundation (1) Coated talc (Example 1) 25.0 (% by weight) (2) Coated sericite (Example 2) 15.0 (3) Coated fine particles Titanium oxide (Example 11) 10.0 (4) Coated Bengala (Example 5) 0.7 (5) Coated yellow iron oxide (Example 6) 3.0 (6) Coated black iron oxide (Executed Example 7) 0.3 (7) Liquid paraffin 16.9 (8) Isopropyl myristate 10.0 (9) Liquid lanolin 5.0 (10) Microcrystalline wax 5.0 (11) Beeswax 5.0 (12) Ethylhexyl paramethoxycinnamate 1.0 (13) 2-Hydroxy-4-methoxybenzophenone 1.0 (14) Sorbitan sesquioleate 2.0 (15) Propyl parahydroxybenzoate 0.1 Production methods: (1) to (6) After the components are mixed and homogenized, they are pulverized. Heat, melt and homogenize the components of (7) to (15) and add
Knead with a roll mill. Heat again, pour into mold and cool to mold.

Example 21 Water-in-oil Emulsion Cream Foundation (1) Decamethylcyclopentasiloxane 20.0 (% by weight) (2) Octyldodecyl myristate 10.0 (3) Paraffin wax 1.5 ( 4) Sorbitan sesquioleate 3.0 (5) Coated titanium oxide (Example 4) 7.0 (6) Coated fine particle titanium oxide (Example 11) 10.0 (7) Coated talc (Example 1) 6.6 (8) Coated Sericite (Example 2) 5.0 (9) Coated Bengala (Example 5) 0.2 (10) Coated Yellow Iron Oxide (Example 6) 1.1 ( 11) Coated black iron oxide (Example 7) 0.1 (12) Purified water 30.0 (13) 1,3-butylene glycol 5.0 (14) Sodium chloride 0.5 Production method: (1)-( After dissolving and homogenizing 4), add (5) to (11) and uniformly disperse with a kneader. (12) to (14) are dissolved and homogenized and added, and the mixture is emulsified uniformly using a planetary mixer.

Example 22 Oil-in-water emulsion sunscreen emulsion (1) Beeswax 0.5 (% by weight) (2) Vaseline 2.0 (3) Squalane 2.0 (4) Sorbitan sesquioleate 0.8 (5) Sucrose fatty acid ester 1.2 (6) Ethyl paraaminobenzoate 3.0 (7) Methyl paraoxybenzoate 0.1 (8) 1,3-butylene glycol 5.0 (9) Sodium carboxymethylcellulose 1% Aqueous solution 10.0 (10) Coated fine particle titanium oxide (Example 11) 10.0 (11) Purified water 62.2 (12) Ethanol 3.0 (13) Fragrance 0.2 Production method: (8) to (11) ) Is treated with a homomixer to disperse the powder. (1) to (7) are mixed by heating and homogenized, and the mixture is emulsified by a homomixer. After cooling, (12) and (13) are added.

[Example 23] Water-in-oil emulsified UV protection cream (1) Sorbitan sesquioleate 5.0 (% by weight) (2) Dimethyl polysiloxane 20.0 (3) Neopentyl glycol dioctanoate 6.5 (4) Microcrystalline wax 2.0 (5) 2-Ethylhexyl paramethoxycinnamate 4.0 (6) Citric acid / sodium citrate buffer 30.2 (7) Glycerin 10.0 (8) 1,3- Butylene glycol 10.0 (9) Methyl paraoxybenzoate 0.3 (10) Coated fine particle titanium oxide (Example 11) 12.0 Production method: (1) to (5) are heated and dissolved, and (10) is added. And pre-dispersed with a homomixer. After adding (6) to (9), the mixture is emulsified by a homomixer and then cooled.

Next, in order to demonstrate the water retention function of the coated powder according to the present invention, the above Examples 1 to 11 were evaluated for moisture retention and water addition test. The test results for the most typical example of water retention, Example 9, are shown in FIGS. In addition, the water retention function was evaluated in the same manner as Comparative Example 1 using nylon powder not coated with sericin.

Here, the moisture retention was evaluated by placing 10 ml of purified water in a vial partitioned by a permeable membrane, precisely weighing 0.1 g of a sample on the permeable membrane, placing and sealing the sample, and aging. The amount of moisture absorbed was determined by an infrared absorption spectrum measuring method.

On the other hand, in the water addition test, 20 g was added to 0.1 g of the sample.
μl of purified water was added and mixed, and the water content of the sample thereafter was measured over time by infrared absorption spectrometry.

In FIG. 1, the nylon powder coated with sericin of Example 9 was about 5% of the untreated comparative example 1.
It has about twice the moisture retention. Also, in FIG. 2, it is recognized that the coated powder of Example 9 clearly retains the added water better than Comparative Example 1. Therefore, the moisturizing powder according to the present invention does not merely exhibit moisture retention due to moisture absorption, but has the property of favorably retaining moisture present in the environment. Has no adverse effect on

Subsequently, in order to measure the slipperiness of the coated powder according to the present invention, the coefficient of friction was measured. The coefficient of friction was measured using the mica of Example 3 and the fine particle titanium oxide of Example 11 which are generally known as non-slip powders, and the ratio of the uncoated powder to the coefficient of friction was determined. It was shown to.

[0046]

[Table 1]

As shown in Table 1, by coating the surface of the powder with hydrolyzed sericin, the friction coefficient of both mica and particulate titanium oxide was reduced to less than half, and the slip of the powder was improved. Indicated.

Subsequently, use tests were conducted on Examples 12 to 23 which were cosmetics containing the coated powder according to the present invention. Comparative examples 2 to 1 were obtained by replacing the powder coated with sericin and its hydrolyzate in Examples 12 to 23 with a powder not coated.
3, each example and each comparative example were blindly used by 10 female panelists, and the feeling of use was subjected to a sensory evaluation based on the following criteria, and the average score was calculated. The results are shown in Tables 2 to 4.

[Elongation on the skin] Good 5 points Good 4 points Normal 3 points Poor 2 points Bad 1 point

[Slip on the skin] Good 5 points Good 4 points Normal 3 points Poor 2 points Bad 1 point

[Irritation at the time of application] No 5 points Somewhat 4 points Normal 3 points Somewhat 2 points Some 1 points

[Finish gloss] There are 5 points Slightly 4 points Normal 3 points Slightly 2 points Not 1 point

[Transparency of finish] 5 points Slightly 4 points Normal 3 points Slight 2 points Not 1 point

[Wrinkle concealing effect] There are 5 points Slightly 4 points Normal 3 points Slightly 2 points Not 1 point

[Pore concealing effect] There are 5 points, somewhat 4 points, normal 3 points, not 2 points, not 1 point.

[Moist feeling immediately after application or after 3 hours] 5 points Slight 4 points Normal 3 points Slight 2 points Not 1 point

[0057]

[Table 2]

[0058]

[Table 3]

[0059]

[Table 4]

In each of the embodiments of the present invention, an excellent cosmetic which is excellent in elongation, slippage, finished gloss, transparency, wrinkle hiding effect, pore hiding effect, irritation is reduced and moist feeling is maintained. It was shown to be.

[0061]

As described above, according to the present invention, the present invention provides an excellent effect of concealing morphological defects such as wrinkles, pores, and roughness, and has a smooth surface, while having an appropriate gloss and transparency. It is possible to provide a powder that has a function of giving a good feeling of moisturizing by supplying moisture to the skin and having a good moisturizing property, and a cosmetic composition containing the same, which has a good slippage and a small physical irritation on the skin. did it.

[Brief description of the drawings]

FIG. 1 is a diagram showing the results of evaluating the moisture retention of powders of Examples and Comparative Examples of the present invention.

FIG. 2 is a diagram showing the results of a water addition test for powders of Examples and Comparative Examples of the present invention.

[Explanation of symbols]

 1: Example 9 2: Comparative Example 1

Claims (2)

[Claims] 1. A sericin-coated powder comprising a surface coated with one or more selected from sericin and hydrolysates thereof. 2. A cosmetic comprising the sericin-coated powder according to claim 1.