JP3494339B2 - Sericin-coated powder, and cosmetic composition comprising the same - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention has an excellent effect of concealing morphological defects of skin such as wrinkles, pores, and roughness of texture while having a proper gloss and transparency, and has a smooth surface and slips. The present invention relates to a powder having a good moisture content, less physical irritation on the skin, a good moisturizing property and a function of replenishing the skin with moisture and giving a moist feeling, and a cosmetic containing the powder.

[0002]

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

However, while such a titanium dioxide makeup cosmetic is effective against pigmentation such as spots and freckles, it is not so effective against morphological defects, and conversely the defects are conspicuous. Sometimes you can let it. Moreover, since it becomes thick, a natural finish cannot be obtained, which is often a problem.

On the other hand, as a method for concealing morphological defects, cosmetics containing various diffuse reflection type powders are known (Japanese Patent Laid-Open No. 228406/60). However, the cosmetics containing these powders have a problem that they tend to cause physical irritation because the skin is easily dried and the surface of the powder is highly uneven.

Powder type cosmetics such as powder type or cake type foundations, eye color, and cheek color are generally stored in compact containers.
It is most widely used in Japan because it is convenient to carry and can be easily and hygienically made up by the built-in sponge. These powder cosmetics are generally prepared by treating the surface of powder such as an extender pigment, a white pigment, and a coloring pigment with a binder such as an oil agent or a surfactant, followed by compression and solidification. In other words, the powder occupies most of the cosmetic ingredients,
Water is not added or is limited to a very small amount even if it is added.

[0006] Therefore, in order to improve the moist feeling of such powder cosmetics, a powder obtained by blending an emollient agent or coating a substance having a high moisturizing property such as collagen, hyaluronic acid or an amino acid derivative by a mechanochemical method or the like is used. For example, it may be blended (Japanese Patent Laid-Open Nos. 61-69710 and 61-282).
307, 62-12709, etc.), attempts have been made to impart moisturizing properties to powder cosmetics. In addition, recently, it has been proposed to blend a pigment coated with one or more monoacyl phospholipids (JP-A-5-255042).

However, in the case of using an emollient agent, it is necessary to add a considerably large amount in order to obtain a sufficient moisturizing feeling, and the oily feeling of the cosmetic composition becomes strong, causing discomfort due to stickiness and poor makeup retention. Tended to become.

Also, regarding the formulation of the powder whose surface is coated with the water-retaining substance, most of the conventional water-retaining substances themselves do not have a very high water-retaining ability, and conversely the moisture from the skin is lowered under low humidity. However, it has the disadvantage that it absorbs moisture in the open air under high humidity to give a sticky and unpleasant feeling of use.

[0009]

The present invention overcomes the above problems, conceals the morphological defects of the skin, has less physical irritation on the skin, and has good moisturizing properties, and this powder. The object of the present invention is to provide a cosmetic composition which is excellent in wrinkle concealing effect, moisturizing property and low in irritation.

[0010]

[Means for Solving the Problems] As a result of intensive studies to solve the above problems, as a result of coating the powder surface with sericin and its hydrolyzate, the morphological defects of the skin are hidden and the Succeeded in obtaining a powder having a good moisturizing property with less physical irritation in the above, and completed the present invention.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The sericin and its hydrolyzate used for coating powder in the present invention are obtained by partially hydrolyzing sericin contained in silkworm cocoons or raw silk in an alkaline aqueous solution or by enzymatic treatment and eluting. Any thing can be used.
The pH of this eluate was adjusted to 3 with organic or inorganic acid.
It is also possible to use a powder which is adjusted to 5 or mixed with a water-soluble organic solvent such as methanol, ethanol or dioxane to precipitate a sericin hydrolyzate, which is filtered, dried and powdered. Furthermore, sericin and its hydrolyzate used in the present invention have an average molecular weight of about 10,000 to 20,000.
In particular, those containing 20 to 40 mol% of serine are particularly preferable.

The coating treatment of sericin and its hydrolyzate on the surface of the powder is carried out by dissolving sericin and its hydrolyzate in a solvent such as water, adding the powder to be coated, mixing and stirring, and then drying. This can be done by removing the solvent. Alternatively, after coating the surface of the powder, the sericin is immobilized on the surface of the powder by modification treatment with formalin or glutaraldehyde, treatment by the chromium method, or treatment with tannic acid. Further, the powder can be mixed with sericin and its hydrolyzate powder by a mechanochemical method to coat the surface.

Powders for coating with sericin and its hydrolyzate include talc, kaolin, mica, sericite, light magnesium carbonate, light calcium carbonate, magnesium sulfate, silicic acid, and other extender pigment powders, titanium oxide. , White pigment powder such as zinc oxide, red iron oxide, yellow iron oxide,
Inorganic coloring pigment powders such as black iron oxide, chromium oxide, chromium hydroxide, ultramarine, turquoise, pearlescent pigment powders such as titanium mica, nylon powders, polystyrene powders, organic pigment powders such as polyethylene powders. be able to.

The amount of sericin and its hydrolyzate coated on the surface of the powder of the present invention is preferably 0.05 to 10.0% by weight, and more preferably 0.2 to 5% by weight. 0.05%
If the amount is 10% by weight or more, no significant difference is observed in the effect.

The powder coated with sericin and its hydrolyzate obtained in the present invention is blended in a cosmetic composition. 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 ingredients. In order to hide the morphological defects of the skin, to reduce physical irritation on the skin, and to exhibit good moisturizing properties, it is desirable to add 5% by weight or more. The upper limit is not particularly limited.

As a cosmetic containing a powder coated with sericin and its hydrolyzate, it is widely applicable to cosmetics using pigments, such as liquid foundation, oily powder foundation, powder type or two-way type cake type foundation. ， Stick foundation, face powder, lipstick, blusher, eye shadow, eyebrow, mascara, etc. , Lotion, etc. are exemplified.

[0017]

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, then 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] Hydrolyzed sericin-coated sericite In the same manner as in Example 1, the surface of sericite was coated with hydrolyzed sericin.

[Example 3] Hydrolyzed sericin-coated mica Mica is immersed in 5 wt% hydrolyzed sericin, and then tannic acid is added to insolubilize sericin. After washing with water, filtering and drying, the surface of mica was coated with hydrolyzed sericin.

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

[Example 5] Bengalala Coated with Hydrolyzed Sericin In the same manner as in Example 1, the surface of red iron oxide was coated with hydrolyzed sericin.

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

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

[Example 8] Hydrolyzed sericin-coated titanium mica In the same manner as in Example 1, the surface of titanium mica was coated with hydrolyzed sericin.

Example 9 Nylon powder coated with sericin Nylon powder 490 g of nylon powder and 10 g of sericin were put into a machine and subjected to lycra treatment for 5 hours to coat the surface of the nylon powder 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 fine particle titanium oxide was coated with hydrolyzed sericin.

[Example 12] Powder foundation (1) Coated red iron oxide (Example 5) 3.0 (wt%) (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) Perfume 0.2 Manufacturing method: Mix (1) to (7), crush and transfer to a high speed blender. (8) to (12) are mixed and added, and mixed uniformly. This is crushed, sized through a sieve, filled in a gold plate and compression molded.

[Example 13] Solid cheek color (1) Coating-treated talc (Example 1) 59.7 (% by weight) (2) Coating-treated sericite (Example 2) 20.0 (3) Coating-treated 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) Perfume 0.2 Manufacturing method: (1) to (6) are uniformly mixed and spread. Then (7)
~ (9) is added by spraying, uniformly mixed, sized through a sieve, filled in a gold plate and compression molded.

[Example 14] Cake type eye color (1) Coating-treated talc (Example 1) 47.7 (wt%) (2) Coating-treated 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 paraoxybenzoate 0.1 (11) Perfume 0.2 Production method: (1) to (6) are uniformly mixed and developed. Then (7)
Add ~ (11) and mix evenly. This is crushed, sized through a sieve, filled in a gold plate and compression molded.

[Example 15] Cake type eye color (1) Coating treatment Mica titanium (Example 8) 35.0 (wt%) (2) Coating treatment Talc (Example 1) 23.7 (3) Coating treatment 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) Perfume 0.2 Manufacturing 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 pulverizing this, the components (1) and (10) are added and mixed. After sizing through a sieve, it is filled in a gold plate and compression molded.

[Example 16] Powder powder (1) Coated talc (Example 1) 60.8 (wt%) (2) Coated sericite (Example 2) 17.0 (3) Calcium carbonate 5. 0 (4) Zinc oxide 10.0 (5) Magnesium stearate 3.0 (6) Colorant 4.0 (7) Perfume 0.2 Production method: (1) to (7) were uniformly mixed with a high-speed blender. After that, a crushing process is performed. The particles are sized through a sieve and filled in a container.

[Example 17] Solid white powder (1) Coated talc (Example 1) 40.7 (wt%) (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) Perfume 0.2 Production method: Mix (1) to (7), pulverize and transfer to a high speed blender. (8) to (11) are mixed and added, and mixed uniformly. This is crushed, sized through a sieve, filled in a gold plate and compression molded.

[0035] [Example 18] Baby powder (1) Coating-treated talc (Example 1) 80.0 (% by weight) (2) Coated nylon powder (Example 9) 20.0 Manufacturing method: (1) and (2) are mixed and crushed to obtain a product.

[Example 19] Milk liquid foundation (1) Stearic acid 2.4 (% by weight) (2) Propylene glycol monostearate 2.0 (3) Cetostearyl alcohol 0.2 (4) Liquid lanolin 2. 0 (5) Liquid paraffin 3.0 (6) Isopropyl myristate 8.5 (7) Sodium carboxymethyl cellulose 0.2 (8) Bentonite 0.5 (9) Propylene glycol 4.0 (10) Triethanolamine 1. 1 (11) Purified water 55.5 (12) Perfume 0.1 (13) Coating treatment Titanium oxide (Example 4) 8.0 (14) Coating treatment Talc (Example 1) 6.5 (15) Coating treatment Red iron oxide (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 powders of 1., the powder is pulverized by a pulverizer. (11) is heated to 70 ° C., (8) is added to swell it well, and (7) is dispersed in (9) in advance, and (10) is further 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, and the mixture is passed through a colloid mill to 75 ° C., the oil phase is added with stirring to emulsify, and after cooling 40
Add (12) at ° C.

[Example 20] Stick-shaped foundation (1) Coated talc (Example 1) 25.0 (wt%) (2) Coated sericite (Example 2) 15.0 (3) Coated fine particles Titanium oxide (Example 11) 10.0 (4) Coated red iron oxide (Example 5) 0.7 (5) Coated yellow iron oxide (Example 6) 3.0 (6) Coated black iron oxide (implemented) 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 paraoxybenzoate 0.1 Manufacturing method: (1) to (6) The ingredients of (1) are mixed and homogenized, and then pulverized. Add the ingredients (7) to (15) after heating, melting and homogenizing.
Knead with a roll mill. It is heated again, poured into a mold and cooled to mold.

[Example 21] Water-in-oil emulsified cream foundation (1) Decamethylcyclopentasiloxane 20.0 (wt%) (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 particulate titanium oxide (Example 11) 10.0 (7) Coated talc (Example 1) 6.6 (8) Coated sericite (Example 2) 5.0 (9) Coated red iron oxide (Example 5) 0.2 (10) Coated yellow iron oxide (Example 6) 1.1 ( 11) Coating treatment Black iron oxide (Example 7) 0.1 (12) Purified water 30.0 (13) 1,3-butylene glycol 5.0 (14) Sodium chloride 0.5 Manufacturing method: (1) to ( After 4) is dissolved and homogenized, (5) to (11) are added and uniformly dispersed by a kneader. (12) to (14) are dissolved, homogenized and added, and uniformly emulsified using a planetary mixer.

[Example 22] Oil-in-water emulsion sunscreen emulsion (1) Beeswax 0.5 (wt%) (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) Perfume 0.2 Manufacturing method: (8) to (11) ) Is treated with a homomixer to disperse the powder. (1) to (7) are mixed by heating, homogenized and added, and emulsified by a homomixer. After cooling (12) and (13) are added.

[Example 23] Water-in-oil emulsion 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 predisperse with a homomixer. Add (6) to (9), emulsify with a homomixer and cool.

Next, in order to show the water-retaining function of the coated powder according to the present invention, the moisturizing property evaluation and the water addition test were conducted on the above Examples 1 to 11. The results of the test for Example 9 showing the most typical water retention property are shown in FIGS. 1 and 2. In addition, the water retention function was evaluated in the same manner by using nylon powder not coated with sericin as Comparative Example 1.

Here, the moisturizing property is evaluated by placing 10 ml of purified water in a vial container partitioned by a permeable membrane, accurately weighing 0.1 g of the sample on the permeable membrane, placing and sealing, and aging over time. The amount of moisture absorbed was determined by an infrared absorption spectrum measurement method.

On the other hand, in the water addition test, 20
μl of purified water was added and mixed, and then the water content of the sample was measured with time by infrared absorption spectroscopy.

In FIG. 1, the nylon powder coated with sericin of Example 9 was about 5% as compared with the untreated Comparative Example 1.
It has about twice the moisturizing properties. Further, in FIG. 2, it is recognized that the coated powder of Example 9 clearly retains the added water better than that of Comparative Example 1. Therefore, the moisturizing powder according to the present invention does not exhibit moisturizing property simply by absorbing moisture, but has a property of favorably retaining moisture existing in the environment, and the stability of the cosmetic composition and the makeup retention by the moisture absorption. However, it does not have an adverse effect.

Then, in order to measure the slipperiness of the coated powder according to the present invention, the friction coefficient was measured. The friction coefficient 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 between the uncoated powder and the friction coefficient was determined. It was shown to.

[0046]

[Table 1]

As shown in Table 1, by coating the surface of the powder with hydrolyzed sericin, both the mica and the fine titanium oxide particles had a friction coefficient of 1/2 or less, and the sliding of the powder was improved. Was shown.

Subsequently, a use test was conducted on Examples 12 to 23, which are cosmetics containing the coated powder according to the present invention. Comparative Examples 2 to 1 in which the powders coated with sericin and its hydrolyzate in Examples 12 to 23 were replaced with powders not coated
3, each Example and each Comparative Example was used by 10 female panelists blindly, and sensory evaluation was performed on the feeling of use according to 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 Normally 3 points Two bad points 1 bad point

[Slip on the skin] Good 5 points Good 4 points Normally 3 points Two bad points 1 bad point

[Stimulation during application] Not 5 4 points Normally 3 points There are 2 points There is one point

[Finishing gloss] There are 5 points There are 4 points Normally 3 points 2 points Not 1 point

[Transparency of finish] There are 5 points There are 4 points Normally 3 points 2 points Not 1 point

[Wrinkle hiding effect] There are 5 points There are 4 points Normally 3 points 2 points Not 1 point

[Effect of hiding pores] There are 5 points There are 4 points Normally 3 points 2 points Not 1 point

[Moisture feeling immediately after application or after 3 hours] There are 5 points There are 4 points Normally 3 points 2 points Not 1 point

[0057]

[Table 2]

[0058]

[Table 3]

[0059]

[Table 4]

In all of the examples of the present invention, the cosmetics are excellent in elongation, slippage, finished luster, transparency, wrinkle-concealing effect, pore-concealing effect, reduced irritation and lasting moisturizing feeling. Was shown.

[0061]

As described in detail above, according to the present invention, it is possible to obtain a smooth surface with an excellent effect of concealing morphological defects such as wrinkles, pores and roughness of the texture while having a proper gloss and transparency. It is possible to provide a powder that has good slipperiness, little physical irritation on the skin, has a good moisturizing property, and has a function of supplying moisture to the skin to give a moist feeling, and a cosmetic containing the powder. did it.

[Brief description of drawings]

FIG. 1 is a diagram showing evaluation results of moisturizing properties 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 the powders of Examples and Comparative Examples of the present invention.

[Explanation of symbols]

1: Example 9 2: Comparative example 1

─────────────────────────────────────────────────── --Continued from the front page (56) Reference JP 62-45511 (JP, A) JP 56-128707 (JP, A) JP 1-144469 (JP, A) JP 62- 12709 (JP, A) JP 61-69710 (JP, A) JP 61-282307 (JP, A) JP 62-209011 (JP, A) JP 61-7207 (JP, A) JP-A-61-69709 (JP, A) JP-A-58-26809 (JP, A) JP-A-62-36308 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) A61K 7/00-7/50

Claims (2)

(57) [Claims] 1. An average molecular weight of 10,000 to 20,000,
A sericin-coated powder having a surface coated with one or more selected from sericin containing 20 to 40 mol% of serine and a hydrolyzate thereof. 2. A cosmetic comprising the sericin-coated powder according to claim 1 blended therein.