JPH0377165B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to improved cosmetics,
A new make-up cosmetic that aims to expand the range of usability of make-up cosmetics, impart continuous and different qualitative changes, improve the uniformity of application and adhesion, and prevent caking of powder products. We aim to provide the following. Conventionally, when considering make-up cosmetics, it has been necessary to increase the amount of oil when producing cosmetics that aim to provide a moisturizing feel in terms of feeling of use and makeup finish. However, if the amount of oil increases, powder products will feel damp and heavy, and if used in a puff, the powder will become wet and heavy.
Because the compressive force when taking it off with a puff, the weight of the powder itself, and the adhesion force of the oil agent increase,
Not only will it cause caking and become difficult to use,
It also becomes difficult to stick to the puff. Furthermore, the oil coating the powder surface impairs the lubricity of the powder itself, resulting in an uneven coating film on the skin, making unevenness noticeable and significantly impairing the makeup effect. On the other hand, if the amount of oil added is reduced in order to compensate for the above-mentioned drawbacks, the surface characteristics of the powder will cause degreasing and dehydration reactions, which will cause discomfort such as dryness and dryness on the skin. In addition, the adhesion effect of oils to the skin is weak, and the powder may float and look fluffy.Furthermore, fine lines and pores may appear open, resulting in makeup that does not shine well and reduces the effectiveness of makeup. It was also a cause of decreased sustainability. In addition, in the case of foundations, the balance between solid fat and liquid fat is often adjusted in order to change the feel of the product.In this case, the more liquid fat there is, the less the foundation stays on. Make-up has a weak adhesion, is difficult to layer, and tends to be sticky and oily.Also, when it contains a lot of solid fat, it spreads hard and has a waxy feel, making it thick and thick all at once. It is difficult to apply make-up that sticks, and it is difficult to apply makeup over and over again, and it requires a great deal of makeup technique.In addition, considering the stability of the foundation itself, there are areas in which the feel of the foundation can be adjusted. was limited in scope. Therefore, as a result of intensive research to overcome these drawbacks, the present inventor found that it is suitable for make-up cosmetics containing compression-disintegrating soft spherical resin capsules containing various ingredients, and hereby presents the present invention. The invention was completed. That is, an object of the present invention is to provide a make-up cosmetic composition that overcomes the above-mentioned drawbacks of conventional make-up cosmetic compositions. A resin capsule made of a homopolymer or copolymer formed from one or more vinyl monomers containing one or more ingredients selected from skin softening ingredients, fragrances, and medicinal ingredients, the capsule containing one or more of the ingredients encapsulated in the capsule. One or more compression-disintegrable soft spherical resin capsules whose encapsulation amount is 50 to 95% by weight of the entire capsule, the particle size of the capsule is 1 to 100 μm, and the pressure (breaking) strength is 5 to 50 Kg/cm ² This can be achieved by a make-up cosmetic product that is characterized in that it contains The term "compression-disintegrable soft spherical resin capsule" as used herein refers to a resin capsule that is constructed so that the resin film of the capsule is broken by pressure from a finger or the like during makeup application, and the various ingredients contained therein are released. The compression-disintegrable soft spherical resin capsules used in the present invention preferably have a particle size of about 1 to 100 μm. If the capsule particle size is smaller than 1 μm, when used as a cosmetic, the expected tactile effects on the skin (slip feel, soft feeling, ease of spreading) due to the soft spherical shape will not be as expected, and if the particle size exceeds 100 μm. It gives rise to a rough and strange feeling. Considering the particle size distribution during the production of resin capsules, the average particle size that satisfies the particle size range of 1 to 100 μm is approximately 5 to 40 μm. Moreover, the spherical shape in the capsule naturally includes not only a true spherical shape but also an ellipse and other similar spherical shapes. Furthermore, the amount of compression-disintegrable soft spherical resin capsules containing various ingredients in cosmetics is as follows:
0.1 to 90 depending on the target product type
The weight percentage can be said to be a suitable range. Moreover, the pressure resistance (breaking) strength of the compression-disintegrable soft spherical resin capsule in the encapsulated state is approximately 5 to 50 kg/cm ² , preferably 5 to 30 kg/cm ² . 5Kg/ ^cm2
Lower pressure resistance is inappropriate when used in cosmetics because it is easily destroyed by external pressure or impact force during the equipment process. On the other hand, if the pressure resistance exceeds 50 kg/cm ² , the capsule will not be destroyed during the makeup operation, which is undesirable. Further, the amount of the components contained in the compression-disintegrable soft spherical resin capsule is 50 to 95% by weight based on the entire capsule. If the amount contained is less than 50% by weight, it will be difficult to obtain an effect unless the amount of capsules added to the cosmetic is significantly increased, which is disadvantageous in terms of economic cost. Moreover, if it exceeds 95% by weight, the strength of the capsule shell will be significantly reduced, and the membrane will not be of practical use in terms of pressure resistance. When the material applied to the compression-disintegrable soft spherical resin capsule of the present invention contains skin softening ingredients, medicinal ingredients, fragrances, etc., the capsule membrane has sufficient resistance to these substances in order to maintain their preservability. Select and use one that is non-transparent. Since it is necessary to add it to cosmetics, it is preferable that the capsule membrane does not contain monomers that may have harmful effects. The compression-disintegrable resin capsule of the present invention is
It is preferably amorphous and transparent (light transmitting), such as acrylic acid, methacrylic acid, acrylic esters (methyl ester, ethyl ester, etc.), methacrylic esters (methyl ester, ethyl ester, etc.) A homopolymer or copolymer selected from one or more of , vinyl acetate, styrene, etc. satisfies the above conditions. Next, the skin softening ingredients included in the compression-disintegrable soft spherical resin capsule include higher fatty acids such as myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, linoleic acid, linoleic acid, and isostearic acid, cetanol, Higher alcohols such as stearyl alcohol, oleyl alcohol, lanolin alcohol, waxes such as beeswax, carnauba wax, spermaceti wax, candelilla wax, hydrocarbons such as liquid paraffin, squalane, microcrystalline wax, petrolatum, Diisostearyl malate, isopropyl myristate, isopropyl palmitate, glycerin 2-ethylhexylate, 2-octyldodecanol lactate, neopentyl glycol di-2-
These include esters such as octyldodecyl diester and diglycerin triisostearate. The medicinal ingredients include various vitamins such as vitamins A, B ₂ , D, and E, which are soluble in the skin softening component, and vitamin-like active substances such as α-lipoic acid and ferulic acid. However, whether it is a skin softening ingredient, a medicinal ingredient, or a fragrance, any fat-soluble raw material that can be generally applied to cosmetics may be used, and the present invention is not limited to these. The method itself for producing compression-disintegrable soft spherical resin capsules in the present invention involves combining the aforementioned monomers having polymerizable unsaturated bonds such as acrylic acid and styrene, various components to be included such as higher fatty acids, and a polymerization initiator. The monomers are mixed and dispersed in an aqueous medium containing an appropriate emulsifying and dispersing agent so as to form oil droplets having the desired particle size, and the monomers are polymerized. Target particle size, inclusion amount,
The pressure resistance strength is adjusted by selecting the type of monomer component, the ratio of the monomer component to the encapsulated component, and the amount and type of emulsification dispersion aid and dispersion conditions. The characteristics of the compressible disintegrating soft spherical resin capsules applied to the present invention will be described in detail below.First of all, within the same dosage form, the feeling of use (feel) varies greatly, and the range can be varied arbitrarily. It is variable. For example, when powder products with smooth fluidity are blended with compression-disintegrable soft spherical resin capsules, the skin-softening ingredients contained within are exposed when the capsules are destroyed, resulting in a moist feeling when used. This means that a different feeling of use can be obtained within the same dosage form. In this way, various components can be included, or two components can be included.
A wide range of usability (feel) is achieved by combining more than 1 species.
is obtained. In addition, when applied to a foundation, the ingredients contained in the capsule do not directly affect emulsification, so by incorporating skin softening ingredients into the capsule, it can be applied to a foundation like a conventional foundation. Changes in the feeling of use (feel), such as increased spreadability, may occur due to changes in the amount of skin softening ingredients and skin moisturizing ingredients such as sugars, polyhydric alcohols, amino acids, water-soluble polymers, and lower organic acid salts. This allows you to expand the range of feel and finish. Second, the compression-disintegrable soft spherical resin capsule does not feel like a foreign body to the touch after use, and does not visually remain on the skin at all. The reason for this is that capsules are spherical and have elasticity, and have the property of being destroyed by external force during use on the skin. The destroyed Ciel microparticles form a thin plate shape and adhere to the skin, and the capsule itself is highly transparent (light transmittance) and has an affinity for oil, making it visually visible on the skin. This is because you will not feel any residue at all. Thirdly, the amount of skin softening ingredients such as oil in the powder product is higher than the amount usually commercially available.
Even if the powder is used in a substantially large amount, the quality of the powder can be maintained and improved without deteriorating the consistency of the powder on the puff or the uniformity of the application on the skin, and without causing the caking phenomenon of the powder. Commercially available powder products are
The surface of the powder is coated with an oil, etc., but due to the increased amount of oil, a caking phenomenon occurs due to the weight of the coated powder itself and the adhesive force of the coated oil, making it difficult for the powder to adhere to the puff, making it difficult to apply it to the skin. It is slow to spread, difficult to spread evenly, and the coating film adheres unevenly to the skin, significantly reducing the makeup effect. Powder products containing compression-disintegrable soft spherical resin capsules contain various ingredients such as oil agents within the capsules, so even if the amount of oil agent increases, there is no stickiness due to oil agents and the product has high fluidity. ,
The powder is light and spreads easily, creating an even film on the skin and enhancing the makeup effect. On the other hand, in powder products with a reduced amount of oil, when the capsule is destroyed, the exposed skin softening ingredients not only become more compatible with the skin, but also contribute to wetting the powder, reducing the adhesion of the powder to the skin. This improvement increases the longevity and adhesion of makeup, and eliminates factors that reduce the makeup effect, such as white cast and fluffing. Fourth, in aqueous, non-aqueous, dispersed, and emulsified cosmetics that contain medicinal ingredients such as fat-soluble vitamins and vitamin-like substances, it is important to note that the medicinal ingredients are not blended into the PH of the system or the cosmetics. It is easy to cause odor and decomposition due to interaction with substances contained in the shell, but by encapsulating such medicinal ingredients, the interaction with substances outside the shell is cut off, and it is effective in improving the stability of cosmetics over time. . Fifth, when a fragrance is encapsulated in a compression-disintegrable soft spherical resin capsule, it is destroyed appropriately by external force during use, which suppresses the disadvantages of conventional products in which the fragrance weakens and disappears over time. It has the effect of destroying the capsule and intensifying the scent. Next, we will explain that the compression-disintegrable soft spherical resin capsules applied to the present invention have low pressure resistance (rupture) strength, a wide range of encapsulated amounts of oils, etc., and are excellent in terms of feel when used. Evaluation of physical properties and sensory properties of soft spherical resin capsules (Table-
1) and a comparative evaluation (Table 2) of Examples 3 to 5 described later and a commercially available product. The physical properties were evaluated by measuring the amount of oil (squalane) encapsulated in the capsule, that is, the encapsulated amount, and by measuring the compressive strength of the capsule. The composition of the commercially available product evaluated in the above usage test is as follows. (Face powder) Talc 78.5 (wt%) Sericite 5.0 Magnesium carbonate 2.0 Titanium oxide 1.0 Magnesium stearate 10.0 Petal 0.5 Liquid paraffin 2.0 Glycerin tri-2-ethylhexanoate 1.0 (Emulsifying foundation) Polyether-modified silicone 2.1 (Weight%) Dimethyl silicone 2.3 Trimeric cyclic silicone 24.0 Titanium oxide 10 Valve handle 10 Muscovite 8.8 Sucrose fatty acid ester 1.9 Sodium hydroxide 0.03 1,3-butylene glycol 2.5 Methylparaben 0.05 Purified water 38.32 (Oil-based stain foundation) ) Vaseline 6.0 (wt%) Candelilla wax 15.5 Castor oil 27.0 Oleyl alcohol 22.6 Octyldodecanol 5.0 Valve handle 23.0 Titanium mica 0.9 [Method for measuring the amount of inclusions] Compression disintegrating soft spherical resin capsules without encapsulation and squalane Mix and disperse the sample uniformly using a Hubamara in weight percent, and then
Precisely weigh 0.03 g and apply it to a uniform thickness on a 3 cm magnetic white non-reflective plate, measure the gloss with a gloss meter (GS750) and draw a calibration curve. Next, the magnetic white non-reflective plate was thoroughly cleaned with ethyl alcohol, and then 0.03g of compression-disintegrable soft spherical resin capsule containing squalane was accurately weighed and applied uniformly onto the 3 x 3 cm non-reflective plate. After, gloss meter (GS750)
The glossiness was measured. The value was calculated as the average value of three times, and the inclusion amount was determined from the calibration curve. [Method for measuring compressive strength] A stainless steel cylinder with a diameter of 13 mm is densely filled with compression-disintegrable soft spherical resin capsules. While applying pressure little by little, we use an optical microscope to check the point at which the capsule begins to break.
The point at which the capsule began to break was indicated as the pressure (breaking) strength.

[Table] ◎: Very good ○: Good △: Slightly bad ×: Fairly bad

【table】

[Table] Next, an example of manufacturing a compression-disintegrable soft spherical resin capsule is shown. Example 1 An oil phase was prepared consisting of 495 parts (by weight, same hereinafter) of methyl methacrylate, 20 parts of methacrylic acid, 3000 parts of squalane, and 15 parts of diisopropyl peroxydicarbonate. Next, an aqueous phase was prepared by adjusting the pH of a mixture of 6300 parts of deionized water, 1390 parts of a 20% solids colloidal silica dispersion, and 90 parts of a 10% aqueous solution of a condensate of diethanolamine and adipic acid to 3.5 with hydrochloric acid. Subsequently, the above oil phase and aqueous phase were stirred at high speed for 60 seconds at 10,000 rpm to disperse the oil phase in the aqueous phase, and then charged into a polymerization reactor purged with nitrogen, and stirred at 55 to 60 °C for 20 seconds at 55 to 60 °C while stirring at 30 rpm. A time reaction was performed. The product thus obtained was repeatedly filtered using a centrifuge and washed with water to obtain a cake-like product with a moisture content of 32% and an average particle size of 19μ. This cake-like product was dried using a flash dryer to obtain powdery compression-disintegrable soft spherical resin capsules with a water content of 0.8%. The content of squalane in this product was 84.8%, and the compressive strength was 12 to 15 Kg/cm ² . Example 2 An oil phase was prepared consisting of 105 parts (by weight, same hereinafter) of methyl methacrylate, 80 parts of styrene, 3200 parts of liquid paraffin, 100 parts of vitamin E, and 17 parts of azobisisobutyronitrile. Next, Example 1
I performed a similar operation. However, the oil phase was dispersed into the water phase at 10,000 rpm for 120 seconds. The resulting compression-disintegrable soft spherical resin capsules had a moisture content of 1.2% and an average particle size.
12μ, encapsulated amount 94.5%, and compressive strength 19-23Kg/cm ² . Next, examples of the present invention will be shown. The blending ratio is weight%
It is. Example 3 Phase Powder D Soft spherical resin capsule (methyl methacrylate/methacrylic acid copolymer) Average particle size Inclusion substance squalane, inclusion amount Compressive strength 86.53% by weight Approximately 19μm 84.8% 12-15Kg/cm ² A Nylon powder salicite valve Handle Yellow iron oxide liquid paraffin 5.0% by weight 0.04 0.05 0.08 B Glycerin 2-ethylhexylate isopropyl myristate 2.0 1.0 C {Mixed fragrance 0.3 After mixing A at low speed with a Henschel mixer for 5 minutes, pulverize and mix with a crusher do. Next, this pulverized mixture was transferred to a Henschel mixer, and while stirring at high speed at room temperature, B was injected and stirred for 5 minutes, and C was further injected and stirred for 3 minutes, followed by D.
After stirring at low speed for 3 minutes, the mixture is taken out, passed through a blower sifter, and filled into containers to produce a product. Example 4 Emulsified foundation A Stearic acid 0.4% by weight Isostearic acid 0.2 Glycerin-2-ethylhexylate 4.0 Stearyl alcohol 0.6 Liquid paraffin 12.0 Activator 4.0 Color pigment paste 16.0 BHT 0.05 Butylparaben 0.02 (Soft spherical resin capsule (methacrylic) Methyl acetate/vinyl acetate copolymer) Average particle size approximately 5 μm Pressure strength 20-25 Kg/cm ² , Encapsulated substance: Diglycerol triisostearate content 73.5% by weight) 5.0 B Triethanolamine 0.4 Propylene glycol 5.0 Methyl paraben 0.02 Purified water 52.21 C Soft spherical resin capsule (methyl acrylate/
Methyl methacrylate copolymer) Average particle size: approx. 40 μm 0.1 Compressive strength: 29-33 Kg/cm ² - Encapsulated substance: Compounded fragrance content: 52.5% by weight Dissolve A by heating while stirring at 75°C, disperse uniformly, and keep warm. Heat B to 80℃ and keep warm. The heated B is gradually added to A to emulsify it, and after stirring while maintaining the emulsification temperature for 10 minutes, the mixture is cooled to 45°C by stirring. At this time, add C, continue stirring and cooling to 35°C, take out and fill in a container to make a product. Example 5 Oil-based stain foundation A Isopropyl myristate 4.0% by weight Liquid paraffin 10.0 Sericite 15.0 Microcrystalline wax 5.0 Solid paraffin wax 7.0 Silicone oil 17.5 Ozokerite 2.0 Activator 2.0 Colored pigment paste 27.0 (soft spherical resin capsules) (Methyl methacrylate/styrene copolymer) Average particle size approximately 12μm Compressive strength 19-23Kg/cm ² Inclusion substance: Liquid paraffin containing vitamin E Inclusion amount 94.5% by weight) 10.3 B Mixed fragrance 0.2 Heat A to 70℃, Add B little by little while stirring and disperse uniformly, then add B and fill directly into the container while maintaining the temperature at 70°C. Thereafter, the product is left to cool.

Claims (1)

[Scope of Claims] 1. Consisting of a homopolymer or copolymer formed from one or more vinyl monomers selected from acrylic acid, methacrylic acid, acrylic ester, methacrylic ester, vinyl acetate, and styrene, a skin softening ingredient, and a fragrance. and medicinal ingredients, wherein the amount of the ingredient encapsulated in the capsule is 50 to 95% by weight of the entire capsule, and the particle size of the capsule is 1 to 100 μm. A make-up cosmetic comprising at least one compression-disintegrable soft spherical resin capsule having a pressure (breaking) strength of 5 to 50 kg/cm ² . 2. The cosmetic according to claim 1, wherein the skin softening component is one or more selected from higher fatty acids, higher alcohols, waxes, hydrocarbons, and esters. 3. The cosmetic according to claim 1, wherein the medicinal ingredient is one or more selected from vitamins and vitamin-like substances soluble in the skin softening ingredient according to claim 2.