JPS63246103A - Material for cosmetics application and its production - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cosmetic applicator material and a method for manufacturing the same. The present invention relates to a porous material for a cosmetic applicator suitable for applying cosmetics while the product is in use, and a method for manufacturing the same.

(Prior Art) Water-based makeup cosmetics in the form of solid powder have been widely used.

Water-based makeup cosmetics are in the form of a solid powder and are applied by dissolving the cosmetics in water.In other words, after the cosmetics are attached to a porous body impregnated with water, the porous body is used to apply makeup. The substance is applied to the skin. Because it uses water, it provides a refreshing feeling and has traditionally been used as a summer cosmetic.

In addition, recently, makeup cosmetics that can be used with or without water (i.e., similar to water-based makeup cosmetics, wet the applicator with water and then apply the cosmetic by adhering to it, or This type of cosmetic (which allows you to apply the cosmetic while it is dry without getting the applicator wet) is easy to use and convenient, so it is preferred by consumers and is often used as a makeup base in the summer. There is.

As applicator materials for aqueous makeup cosmetics, various foams such as natural sponge, polyurethane foam, rubber latex foam, and polyvinyl alcohol foam, and porous materials such as nonwoven fabrics have been widely used.

Materials for makeup cosmetic applicators that can be used with or without water need to be flexible even in dry conditions, so various foams such as polyurethane foam and rubber latex foam, and porous materials such as non-woven fabrics are used. Quality materials are used.

[Problem that the invention seeks to solve]

There is a strong demand for cosmetics and cosmetic applicators used for summer makeup to provide a cooling sensation when used.

Natural sponges and polyvinyl alcohol foams are flexible and have a cool feel when wet, so they are preferred for use in applying water-based makeup cosmetics. However, natural sponge is expensive and, furthermore, is stiff when dry, making it unsuitable for use as a dual-use cosmetic applicator that can be used with or without water. Further, although polyvinyl alcohol foam is flexible when wet, it becomes extremely hard when dry, making it unsuitable as a dual-use cosmetic applicator for use with or without water.

Moreover, when rewetting the foam from a dry state, there is a problem in that it takes time for the water to penetrate into the foam.

On the other hand, polyurethane foam and rubber latex foam are flexible even in a dry state, so they are suitable as a dual-use makeup cosmetic applicator that can be used with or without water. However, even when applied using water, there is a problem in that the skin does not feel cool when it comes in contact with the skin.

The present invention solves these conventional problems, and when applying water-based makeup cosmetics, it is possible to apply the cosmetics refreshingly while getting a cooling sensation from the applicator used, and moreover, it is flexible even in dry conditions. It is an object of the present invention to provide a porous material for a cosmetic applicator that is suitable for application of dual-use cosmetics with and without water, and a method for manufacturing the same.

[Means for solving problems]

The present invention solves the above-mentioned problems by providing a foam mainly composed of rubber latex, which is breathable and flexible even in a dry state.
The foam was solved by a cosmetic applicator material having, in addition to small pores formed by air bubbles, micropores formed by the elution of fine particles soluble in water or an aqueous solution.

Furthermore, according to the present invention, as a method for manufacturing the cosmetic applicator material, fine particles soluble in water or an aqueous solution are mixed and blended into a liquid mainly composed of rubber latex, and a gas is blown into the mixed liquid. Alternatively, a blowing agent is mixed, solidified in a foamy state, and vulcanized to form a rubber latex foam, and the rubber latex foam is washed with water or an aqueous solution to elute the fine particles from the rubber latex foam. Provided is a method for producing a material for a cosmetic applicator, which is characterized by forming micropores.

[Function] In the cosmetic applicator material of the present invention, small pores formed by air bubbles and micropores formed by elution of fine particles are present throughout the rubber latex foam. In this way, since there are small and micropores throughout the cosmetic application material,
When the cosmetic applicator using the material of the present invention gets wet with water,
Capillary action occurs due to the micropores, and water travels through the micropores and rises to the surface on which the cosmetic is applied, keeping the surface on which the cosmetic is applied always wet. Moreover, since this surface has a fine uneven structure and has breathability and water permeability, water easily evaporates.
The evaporation of water cools the cosmetic application surface, thus providing a cooling sensation upon application.

Furthermore, since the entire cosmetic applicator has small pores and micropores, the amount of water retained when the cosmetic applicator is wetted with water is increased.

Furthermore, since the material of the applicator is rubber latex foam and is flexible even in a dry state, it can be used to apply both water- and water-less cosmetics.

〔Example〕

The cosmetic applicator material of the present invention is a foam mainly composed of rubber latex, which is breathable and flexible even in a dry state. Alternatively, micropores are formed by elution of microparticles that can be dissolved in an aqueous solution.

The aqueous solution may be an acidic aqueous solution or an alkaline aqueous solution, or an aqueous solution containing an oxidizing agent or a reducing agent.

Furthermore, an aqueous solution containing enzymes such as diastase and amylase may be used to dissolve fine particles such as starch.

As rubber latex, even natural rubber latex, N
Synthetic rubber latex such as BR latex and SBR latex can also be used.

Fine particles that can be dissolved in water or an aqueous solution to be mixed into the rubber latex foam include starch, dextrin, higher alcohols (for example, oleyl alcohol, stearyl alcohol, pentaerythritol, polypropylene glycol, polyethylene glycol, etc.), fatty acids, etc. Fine particles of stearic acid, oleic acid, etc.), calcium carbonate, etc. may be used.

The size of the fine particles (particle diameter) is such that the fine pores formed by the elution of the fine particles can moisten the surface to which the cosmetic is applied due to capillary action.

The particle size of potato starch, corn starch, sweet potato starch, etc. is generally about 1 to 200 microns, but it is preferable that the fine particles are smaller than the skeleton of the foam. If the fine particles are larger than the foamed skeleton, the foamed skeleton will be torn, resulting in poor foaming stability, resulting in poor foaming, and also reducing capillary action. Therefore, the particle size should be 100 microns or less, preferably 50 microns or less.

In addition, if the particle size is too small and the amount of fine particles mixed in the foam is small, the amount of water that rises to the surface of the applicator due to capillary action may not be sufficient, so the particle size should be approximately 1 micron. It is preferable to keep it up to.

To produce the cosmetic applicator material of the present invention, first, a foaming raw material liquid containing rubber latex as a main component to form a foam is added with a crosslinking agent or vulcanizing agent, a foam stabilizer, and an inorganic or organic Mix the particulates.

The mixing ratio of the raw materials forming the foam and the fine particles is such that if there are too few fine particles, the wetting effect due to capillary action will be small, and if there are too many, the strength of the foam will decrease or the viscosity during foaming will become too high, causing foaming. become unable. Therefore, the fine particles should be used in an amount of 5 to 100 parts by weight, preferably 5 to 30 parts by weight, per 100 parts by weight of the solid content of the rubber.

As a crosslinking agent for rubber latex, sulfur or a sulfur-containing vulcanizing agent, a vulcanization accelerator, etc. may be used.

As the foam stabilizer, potassium oleate, potassium stearate, ammonium stearate, ammonium oleate, etc. may be used.

Air or other gas is blown into the mixed liquid using an open-cell device such as an oak mixer, or a blowing agent is mixed therein to foam the mixture three to five times.

As the blowing agent, gas generating substances such as low boiling point liquids such as freon, butane, propane, etc. can be used.

Next, the foamed mixture as described above is discharged from the open cell device, put into an arbitrary cast body, solidified, heated or steamed to vulcanize, and taken out from the cast body.

After slicing, punching, etc., this foam is washed in water (cold water or hot water is acceptable) or an aqueous solution to remove some of the fine particles and foam stabilizer contained in the foam. is eluted to form micropores in the foam.

In addition, in the case described above, fine particles such as starch, dextrin, and higher alcohols were eluted after being formed into the shape of a cosmetic applicator, but when the foam was in the form of a sheet, fine particles were eluted. It may also be finished as a cosmetic applicator by punching or the like.

According to another embodiment of the cosmetic applicator material of the present invention, similar to the previous embodiment, the applicator material is made of a rubber latex foam that is breathable and flexible even in a dry state. Similarly to the example, the foam has small pores formed by air bubbles and micropores formed by elution of fine particles soluble in water or an aqueous solution, and furthermore, the foam has tan
Contains powder.

By mixing the fiber powder into the foam in this way, it has a good feel, and furthermore, it is possible to obtain even better water absorbency and a cooling effect when wet with water.

The miscellaneous powders include cellulose fibers such as cotton, viscose rayon, cupro, hemp, flax, paper, and bulbs; protein fibers such as crushed products of sponge, wool, animal hair, and natural leather; and nylon, polyester, and acrylic. ! Synthesis of lH etc.
It is possible to use finely pulverized material. Preferably, hydrophilic fibers such as cellulose 4I fibers and protein fibers are used. In addition, in the case of synthetic TIML, it is preferable to use a fine denier pulverized fiber.

If the fiber powder is too large, it will have a negative effect on the foam, so
Use a material that can pass through a sieve of about 20 mesh. Preferably, one that passes through a 50-mesh sieve is used.

The thickness of the m fibers used in the fiber powder is 15 deniers or less, preferably 5 deniers or less. For synthetic fibers, the denier should be 1 denier or less to provide a good feel. In particular, Synthesis I! Of the miscellaneous items, it consists of nylon, polyester, etc., and is redivided! If the fiber is made of ultrafine denier, such as 0.005 to 0.2 denier, such as l fiber or sea-island fiber, a very good feel can be obtained.

To form a foam containing fiber powder, when mixing a vulcanizing agent, a foam stabilizer, and inorganic or organic fine particles with the rubber latex for forming the foam, the fiber powder is also mixed. A good mixing ratio of the m-fiber powder is 1 to 40 weight percent, preferably about 3 to 15 weight percent, based on the solid content of the foaming raw material liquid. When the above-mentioned preferred range is set, an even better feeling can be obtained.

Even when fiber powder is mixed, the cosmetic applicator material can be manufactured by processing in the same manner as in the above-described embodiment. That is, air or other gas is blown into the mixed liquid in an open-cell VT device such as an oak mixer, or a foaming agent is mixed therein to foam the mixture to a size of 3 to 5 times. The foamed mixture as described above is discharged from the open cell device, poured into an arbitrary cast body, solidified, heated or steamed to vulcanize, and taken out from the cast body. After slicing, punching, etc. the taken out foam, the molded foam is washed in water or an aqueous solution (acidic aqueous solution, alkaline aqueous solution, aqueous solution containing an oxidizing agent or aqueous solution containing a reducing agent), and then A portion of the fine particles and foam stabilizer contained therein are eluted to form micropores in the foam.

The porous material having the foam thus produced is punched out, processed by molding, etc., and finished as a cosmetic applicator.

(Example 1) N1pol LX-511 of NBR latex...
A 30% aqueous dispersion made by emulsifying 200 parts by weight of zinc white and sulfur in a ratio of 3:1 with 70 parts of water.
・18 parts by weight, vulcanization accelerator MZ...4 parts by weight, vulcanization accelerator EZ...5 parts by weight, anti-aging agent SP...1.8
Parts by weight, trimene base...1.5 parts by weight, Emulgen 920 (a product of Dai-ichi Kogyo Co., Ltd.)...1.3 parts by weight.Formulation A: Corn starch...35 parts by weight, water. ...60 parts by weight, sodium silicofluoride...10
Using an oak mixer, Formulation B consisting of 100 parts by weight was injected at a ratio of 35 parts by weight to 100 parts by weight of Formulation A, and discharged while foaming to about 4 times the volume. Cast and solidified into shape.

Further, the product was subjected to steam oil sulfurization at 102° C. for 30 minutes in a steam box to obtain an NBR latex foam.

Slice this latex foam into 5mm thick pieces.
It was used as a material for disc-shaped puffs.

After grinding and forming this material, 0.05% of caustic soda
% aqueous solution (40°C) for 24 hours, then stirred,
Washing and dehydration were repeated twice to elute the corn starch, which was then dehydrated and dried.

The puff thus obtained had extremely excellent absorbency and water retention.

The finished product was wetted and placed on a glass plate placed parallel to the wind at a standard g (22° C., 65% relative humidity) and a wind speed of 1 m/s. Then, the surface humidity of the surface of the cosmetic applicator material on the side on which the foam was formed was measured using a digital thermometer Delta 5K-1250 (manufactured by Sato Keiki Seisakusho Co., Ltd.) equipped with a surface contact sensor.

Note that instead of using a surface contact type thermometer, a thermometer capable of non-contact temperature measurement, such as the non-contact thermometer THERMO-HUNTER manufactured by Obtics Co., Ltd., may be used. This thermometer collects infrared energy (detection wavelength: 7 to 20 μm) using an aspherical mirror, converts it into an electrical signal using a thermomobile, processes it electrically, and displays the temperature on a liquid crystal display. Changes in temperature can be easily measured.

Measurement result; After 3 minutes, the surface temperature dropped to 15°C.

(Comparative Example) The measurements described above were carried out using a cosmetic applicator made of NBR latex foam (product of Yukigaya Chemical Co., Ltd.) with a thickness of 81IlIn (without the micropores of the present invention as described above). The method measured the change in surface temperature of the cosmetic applicator.

Measurement result: After 3 minutes, the surface temperature was 20°C.

(Example 2) Natural rubber latex...200 parts by weight, vulcanization accelerator E
Z...1.8 parts by weight, vulcanization accelerator MZ...3.2 parts by weight, anti-aging agent SP...2.2 parts by weight, trimene base...0.8 parts by weight, sulfur... ...11 parts by weight of potassium oleate, 8 parts by weight of zinc white, 5 parts of zinc white, and 20 parts by weight of cyclodextrin insoluble in cold water.・12 parts by weight, vulcanization accelerator D...2.1 parts by weight, sodium silicofluoride...11 parts by weight cyclodextrin...10 parts by weight, urethane emulsion Superflex #100 (Daiichi Kogyo Seiyaku) Co., Ltd.'s product]...A mixture consisting of 55 parts by weight was used as liquid B, and while injecting liquid B at a ratio of 60 parts by weight to 100 parts by weight of liquid A using an oak mixer, approximately 4 parts by weight was added. The product was discharged while foaming to double its original size, cast into a cylindrical shape and left to stand, and steamed and sulfurized for 45 minutes while solidifying to form a mixed latex foam of natural rubber/polyurethane.

After slicing this latex foam into 7 mm thick slices, it was immersed in an aqueous solution containing amylase and diastase mixed at a ratio of 1:2 at 40°C for 24 hours, and then stirring, washing, and dehydration were repeated twice to form cyclodextrin. was eluted and then dehydrated and dried.

The puff thus obtained had excellent absorbency and water retention, and was also excellent in strength. Furthermore, when the foam was wetted with water as in Example 1, the cooling effect on the surface of the foam was large.

(Example 3) Natural rubber latex...15011 parts, SBR latex JSR#561 (product of Japan Synthetic Rubber Industry Co., Ltd.)...100 parts by weight, vulcanization accelerator EZ...2.
5 parts by weight, vulcanization accelerator MZ...4 parts by weight, anti-aging agent SP...2.6 parts by weight, trimene base...2 parts by weight, sulfur...15 parts by weight, potassium oleate... A mixture consisting of 7 parts by weight, 30 parts by weight of corn starch; 16 parts by weight of zinc white, 1 part by weight of vulcanization accelerator D, and 1 part by weight of sodium fluorosilicide. ...7 parts by weight (powder), Dicna
l #2575 (emulsion of polyacrylic acid ester, product of Dainippon Ink & Chemicals Co., Ltd.)...1
A mixture consisting of 0 parts by weight, 70 parts by weight of urethane emulsion Superflex #100 (product of Daiichi Kogyo Seiyaku Co., Ltd.), and 10 parts by weight of stearic acid powder was used as liquid B, and mixed in an oak mixer. - using liquid A and B
3. While blowing air into the liquid at a ratio of 1:0.4.
The mixture was discharged while foaming to 5 times its original size, cast into a square prism shape, and left to stand for 30 minutes to solidify. After that, 1 in a steaming box.
After heating at 0.01°C for 45 minutes, the mixture was taken out and sliced into 8 mm thick pieces to obtain rubber foam sheets. After punching this into a circular shape, it was stirred in an aqueous solution of 3 g/l of caustic soda at 40°C.
After repeating washing and dehydration twice, it was further washed with hot water to elute the corn starch, and then dehydrated and dried.

The puff thus obtained had excellent absorbency and water retention, and was also excellent in strength. Further, when the foam was wetted with water as in Example 1, the cooling effect on the surface of the foam was large.

(Example 4) NBR latex (7) NipOf LX-531 (
Nippon Zeon Co., Ltd. product)...100 parts by weight, Trimenbase...0.4 part by weight, and vulcanization accelerators Accel EZ and MZ (Kawaguchi Chemical Co., Ltd. product) were mixed in a ratio of 1=2. A 50% water emulsion of the mixture...
Double mouth part, 2 parts by weight of 50% water emulsion of anti-aging agent ANTAGE SP (product of Kawaguchi Chemical Co., Ltd.), 7 parts by weight of 60% water emulsion of sulfur, 7 parts by weight of potassium oleate 20
% aqueous solution... 3x Danbe, ammo stearate 230%
Aqueous solution: 5 parts by weight, corn starch: 30 parts by weight, 5% aqueous poval solution: 15 parts by weight; 25% water emulsion of zinc white: 20 parts by weight , vulcanization accelerator Accel D [product of Kawaguchi Chemical Co., Ltd.]
30% water emulsion... 3 layers, 2 parts of sodium silicofluoride
5% water emulsion...10 parts by weight, foaming agent Freon...
・Formulation B consisting of 4 parts by weight was injected using an oak mixer at a ratio of 150 parts by weight of Formulation A and 20 parts by weight of Formulation B, and further air was blown into the foam to about 4 times the size. The mixture was discharged while stirring, cast into a cylindrical shape, and allowed to stand for 30 minutes before being solidified.

Furthermore, after vulcanizing at 102°C for 20 minutes, it was removed from the mold and heated to 10 mI! The material was sliced into l-thick pieces to obtain a disc-shaped puff material.

This material was added to a 0.1% aqueous solution of diastase at 40℃ for 2 hours.
The sample was left immersed for 0 hours, washed with hot water at 90°C to elute the corn starch, and then dehydrated and dried.

The puff thus obtained had extremely excellent absorbency and water retention. Further, when the foam was wetted with water as in Example 1, the cooling effect on the surface of the foam was large.

〔Effect of the invention〕

According to the cosmetic applicator material of the present invention, the foam mainly composed of rubber latex has small pores formed by air bubbles and micropores formed by elution of fine particles. When the cosmetic applicator made using the cosmetic applicator is wetted with water, capillary action occurs due to the micropores, and water travels through the micropores and rises to the surface on which the cosmetic is applied, keeping the surface on which the cosmetic is applied always wet. Therefore, when applying the cosmetic, the water comes into contact with the skin before the surface on which the cosmetic is applied, giving a cooling sensation and allowing the cosmetic to be applied in a refreshing manner.

Moreover, since the cosmetic application surface has a fine uneven structure and has air permeability and water permeability, water evaporates easily, and the evaporation of water cools the cosmetic application surface, resulting in an even more refreshing feeling during application. You can get

Further, according to the cosmetic applicator material of the present invention, since small pores and micropores are present throughout the foam, the amount of water retained when the cosmetic applicator is wetted with water is increased.

Furthermore, when fiber powder is mixed into the foam, the feel becomes better. Moreover, if the IIN powder is made hydrophilic,
Even better water absorbency and cooling effect when wet can be obtained.

Since the cosmetic applicator material of the present invention has a soft feel,
It is suitable not only as an applicator for aqueous makeup cosmetics, but also as an applicator for other cosmetics, such as liquid cosmetics.

Claims (1)

[Claims] 1. A foam mainly composed of rubber latex that is breathable and flexible even in a dry state, and the foam has small pores formed by air bubbles as well as water or an aqueous solution. A cosmetic applicator material characterized by having micropores formed by the elution of fine particles that can be dissolved in. 2. It is a foam mainly composed of rubber latex, which is breathable and flexible even in a dry state, and in addition to small pores formed by air bubbles, the foam also has the ability to elute microparticles that can be dissolved in water or an aqueous solution. A cosmetic applicator material characterized by having micropores formed by the above method and further containing fiber powder. 3. Mix and blend fine particles that can be dissolved in water or an aqueous solution into a liquid mainly composed of rubber latex, blow gas into the mixed liquid or mix a foaming agent, solidify in a foamy state, and vulcanize. A cosmetic applicator material characterized in that a rubber latex foam is formed, and the rubber latex foam is washed with water or an aqueous solution to elute the fine particles from the rubber latex foam and form micropores. manufacturing method. 4. Fiber powder and fine particles that can be dissolved in water or an aqueous solution are mixed and blended into a liquid mainly composed of rubber latex, and a gas is blown into the mixed liquid or a foaming agent is mixed to form a foaming state. The rubber latex foam is coagulated and vulcanized to form a rubber latex foam, and the rubber latex foam is washed with water or an aqueous solution to elute the fine particles from the rubber latex foam and form micropores. A method for manufacturing a cosmetic applicator material.