TWI811376B - Cosmetics - Google Patents

Abstract

The present invention provides a cosmetic containing composite particles coated with zinc oxide in an amount of 0.05 to 2 parts by mass relative to 1 part by mass of alkenyl starch succinate metal salt. The alkenyl starch succinate metal salt may be selected from the group consisting of octenyl starch succinate metal salt, decenyl starch succinate metal salt, dodecenyl starch succinate metal salt, tetradecane starch ester metal salt, One or more species from the group consisting of carbenyl starch succinate metal salt, hexadecenyl starch succinate metal salt, and octadecenyl starch succinate metal salt.

Description

Cosmetics

The present invention relates to a cosmetic.

Cosmetics are applied to human skin before use, so they require resistance to sweating or sebum from the skin. Generally speaking, they are required not to become oily or make up. In order to meet such demands, research is being conducted to prevent makeup from coming off by applying various improvements to powders used in cosmetics.

For example, there is a method of blending inorganic porous powders such as porous silica or porous spherical magnesium carbonate into cosmetics. If these powders absorb moisture from the skin, the skin will not have enough emollient ingredients, causing skin problems. Problems with dryness or itching (Patent Document 1, Patent Document 2). In addition, organic powders such as acrylic polymers are also used as sebum adsorbents, and the development of materials with better sebum adsorption capacity than these sebum adsorbents is expected.

Zinc oxide, on the other hand, is used in the cosmetic field as a white pigment or UV shielding material depending on its particle size. For example, it is known that fine particles of zinc oxide react with fatty acids in sebum to immobilize the sebum and inhibit the expansion of the sebum, thereby improving the durability of makeup (Patent Document 3). However, this kind of fine particle zinc oxide has the disadvantage of being dry and astringent and having poor touch when blended into cosmetics. Therefore, as long as zinc oxide particles with excellent touch feel and high sebum curing ability can be obtained, it will become a very useful material in the field of cosmetics.

In addition, it is also known that a composite powder coated with 0.2 to 2 parts by mass of zinc oxide based on 1 part by mass of (acrylate/ethylhexyl acrylate) cross-linked polymer (Patent Document 4) is required to exhibit higher sebum curing Powerful powders and cosmetics. [Prior technical literature] [Patent Document]

[Patent Document 1] Japanese Patent Application Laid-Open No. 2009-137806 [Patent Document 2] Japanese Patent Application Publication No. 2006-096706 [Patent Document 3] Japanese Patent Application Laid-Open No. 8-41379 [Patent Document 4] Japanese Patent No. 6467100

[Problem to be solved by the invention]

An object of the present invention is to provide a cosmetic containing composite particles exhibiting high sebum solidification ability. [Technical means to solve problems]

The present invention has the following gist. [1] A cosmetic containing 0.05 to 2 parts by mass of zinc oxide-coated composite particles based on 1 part by mass of alkenyl starch succinate metal salt. [2] The cosmetic according to [1], wherein the composite particles are coated with zinc oxide in an amount of 0.1 to 1.5 parts by mass based on 1 part by mass of alkenyl starch succinate metal salt. [3] The cosmetic of [1] or [2], wherein the alkenyl starch succinate metal salt includes a metal salt selected from the group consisting of octenyl starch succinate metal salt and decene starch succinate metal salt. , dodecenyl starch succinate metal salt, tetradecenyl starch succinate metal salt, hexadecenyl starch succinate metal salt, and octadecenyl starch succinate One or more of the group consisting of ester metal salts. [4] The cosmetic according to [3], wherein the alkenyl starch succinate metal salt includes an octenyl starch succinate metal salt.

[5] The cosmetic according to any one of [1] to [4], wherein the metal salt of alkenyl starch succinate is selected from the group consisting of sodium alkenyl starch succinate and potassium alkenyl starch succinate. , magnesium alkenyl starch succinate, calcium alkenyl starch succinate, barium alkenyl starch succinate, copper alkenyl starch succinate, aluminum alkenyl starch succinate, alkenyl butadiene One or more of the group consisting of iron starch ester and zirconium alkenyl starch succinate. [6] The cosmetic according to [5], wherein the metal salt of alkenyl starch succinate contains aluminum alkenyl starch succinate. [7] The cosmetic according to any one of [1] to [6], wherein the metal salt of alkenyl starch succinate contains aluminum octenyl starch succinate.

[8] The cosmetic according to any one of [1] to [7], wherein the average particle size of the alkenyl starch succinate metal salt is 1 to 30 μm. [9] The cosmetic according to any one of [1] to [8], wherein the zinc oxide has an average particle diameter of 10 to 200 nm. [10] The cosmetic according to any one of [1] to [9], wherein the zinc oxide includes hydrophobized zinc oxide. [Effects of the invention]

According to the present invention, it is possible to provide a cosmetic that contains composite particles exhibiting high sebum solidification ability, is less likely to overflow sebum, and exhibits a high makeup durability effect.

Hereinafter, the form for carrying out the present invention will be described in detail. However, the present invention is not limited to the following embodiments.

The composite particles contained in the cosmetic of the present invention are composite particles containing alkenyl starch succinate metal salt and zinc oxide coating the alkenyl starch succinate metal salt, and are preferably smaller than alkenyl succinate. 1 part by mass of acid starch ester metal salt, and 0.05 to 2 parts by mass of zinc oxide. The composite particles are preferably in the form of composite particles in which the surface of the particles of alkenyl starch succinate metal salt is coated with zinc oxide.

The alkenyl starch succinate metal salt of the present invention is a metal salt of starch succinate having an alkenyl group. In alkenyl succinic acid, the carbon number of the alkenyl group is preferably 5 to 22, more preferably 10 to 20, and still more preferably 8 to 18. Examples of alkenyl succinic acid include: octenyl succinic acid, decenyl succinic acid, dodecenyl succinic acid, tetradecenyl succinic acid, and hexadecenyl succinic acid. Acid, octadecenylsuccinic acid, etc. In particular, metal salts of starch octenyl succinate are preferably used. The metal salt is preferably a monovalent, divalent or trivalent metal salt, and examples thereof include sodium, potassium, magnesium, calcium, barium, copper, aluminum, iron, zirconium and the like. In particular, the aluminum salt, calcium salt, and sodium salt of alkenyl starch succinate can be preferably used, and the aluminum salt is more preferred. Among them, aluminum starch octenyl succinate is preferably used.

Examples of starches that can be used in the present invention include natural starches such as corn starch, tapioca starch, rice bran starch, and amaranth starch, and small particles of wheat starch or potato starch. Moreover, such processed starch can be used, and examples thereof include acid-decomposed starch, oxidized starch, etherified, esterified, cross-linked and other starch derivatives, moist heat-treated starch, and the like.

The average particle diameter of the alkenyl starch succinate metal salt used in the composite particles of the present invention is preferably 1 to 30 μm, and more preferably 2 to 25 μm, in terms of composite formation. Here, the average particle diameter is a volume-based average particle diameter measured by a laser diffraction/scattering particle size distribution measuring device. The shape of the alkenyl starch succinate metal salt is not particularly limited, and may be, for example, spherical, elliptical, polygonal, broken, or other particle shapes. The production method of alkenyl succinic acid starch metal salt can be based on routine practice.

The zinc oxide used in the composite particles of the present invention is not particularly limited as long as it can be blended into cosmetics. The shape of zinc oxide is not particularly limited, but from the viewpoint of sebum curing ability, the average particle diameter is preferably 10 to 200 nm, more preferably 15 to 100 nm, and still more preferably 15 to 50 nm. Here, the average particle diameter is based on the principle of electron microscopy, and the particle diameter of 1,000 particles is measured, and is regarded as the average particle diameter of the number average.

Untreated zinc oxide can also be used directly as zinc oxide. It is better to use zinc oxide that has undergone hydrophobic treatment. The hydrophobic treatment agent is not particularly limited, and examples thereof include silicone, methyl hydrogen polysiloxane, and metallic soap. Among these hydrophobic treatment agents, silicone, methyl hydrogen polysiloxane, copolymers thereof, or mixtures thereof are preferably used. The coating amount of the hydrophobizing treatment agent may be an amount sufficient to hydrophobize zinc oxide. Specifically, the mass ratio between zinc oxide and the hydrophobic treatment agent is preferably 85:15 to 99:1, and more preferably 90:10 to 98:2.

In the composite particles used in the cosmetics of the present invention, the coating amount of zinc oxide is 0.05 parts by mass or more, more preferably 0.1 parts by mass or more, and still more preferably 1 part by mass of alkenyl starch succinate metal salt. 0.2 parts by mass or more. Furthermore, the coating amount of zinc oxide is 2 parts by mass or less, more preferably 1.5 parts by mass or less based on 1 part by mass of the alkenyl starch succinate metal salt. Within this range, sebum solidification performance can be further improved and sebum overflow can be prevented. The coating amount of zinc oxide is 0.05 to 2 parts by mass, more preferably 0.1 to 1.5 parts by mass relative to 1 part by mass of alkenyl starch succinate metal salt.

As a method for coating the alkenyl starch succinate metal salt with zinc oxide, various methods known so far can be used. For example, a physical and chemical mixing grinding method (dry method, wet method) or a chemical deposition method can be selected. In terms of the sebum solidification ability of the composite particles, the dry mixing and grinding method can be preferably used.

The composite particles of the present invention may be composed of one or two or more types selected from the above alkenyl starch succinate metal salts and coated with zinc oxide. As zinc oxide, untreated zinc oxide, hydrophobized zinc oxide, or a combination thereof can be used. Furthermore, in the cosmetic of the present invention, one type or a combination of two or more types selected from the above-mentioned alkenyl starch succinate metal salts and zinc oxide, that is, composite particles may be prepared individually or in combination of two or more types. .

By containing the above-mentioned composite particles, the cosmetic of the present invention can exhibit sebum-solidifying ability and an excellent makeup-maintaining effect.

The compounding amount of the composite particles in the cosmetic is preferably 0.5 to 90% by mass relative to the total amount of the cosmetic. If the blending amount is less than 0.5% by mass, the sebum-curing ability of the composite particles tends to be difficult to effectively exert in cosmetics. On the other hand, if more than 90% by mass of the composite particles are blended into the cosmetic, it will tend to be difficult to formulate.

The use of the cosmetics of the present invention is not particularly limited. In terms of its effects, it can be preferably used in color cosmetics such as pressed powder, base makeup, sunscreen cosmetics, etc.

The dosage form of the cosmetics of the present invention is not particularly limited, and examples thereof include powder cosmetics, emulsified cosmetics, and two-layer cosmetics.

In addition to the composite particles, the cosmetics of the present invention can be appropriately formulated with water-based ingredients, moisturizers, oily ingredients, pigments, surfactants, ultraviolet absorbers, thickeners, beauty ingredients, fragrances, and polymers that are usually formulated in cosmetics as needed. Substances, antibacterial and antifungal agents, alcohols, powders, cleaning agents, ingredients derived from living organisms, etc. [Example]

The present invention will be specifically described below through examples, but the scope of the present invention is not limited thereby. In addition, unless otherwise specified, the compounding quantity is mass %.

(composite particles) Composite particles were obtained by mixing the core particles shown in Table 1 with zinc oxide using a mixer for 2 hours. When the composite particles were observed with a microscope, it was found that the core particles were coated with zinc oxide. In addition, as zinc oxide, zinc oxide with an average particle diameter of 25 nm was used, which was treated with 5% silicone. In Table 1, the coating amount of zinc oxide is expressed as a mass ratio relative to the total amount of core particles and zinc oxide. Table 1 shows the average particle size of the core particles before zinc oxide coating.

(Oleic acid curing test) (a) Measure 5 g of oleic acid (PM810: Miyoshi Oils and Fats Co., Ltd.) and 1 g of ion-exchange water in a 20 mL beaker, and heat it to 35 to 40°C using a hot plate set to 40°C. (b) Add 0.5 g of composite particles to (a), use a spatula, and stir for 30 seconds to achieve homogeneity. (c) After stirring, immediately put the stirrer in and stir with the stirrer (200 rpm). Measure the time from the start of stirring to the gelation of oleic acid until the rotation of the stirring bar is stopped, and set it as the solidification time.

[Table 1] nuclear particles Average particle size (μm) shape Zinc oxide coating amount (%) Curing time (seconds) composite particles 1 Aluminum octenyl starch succinate (Octier: Nidian Chemical Co., Ltd.) 5-20 Polygonal shape 20 0 2 30 0 3 50 0 4 0 Uncured 5 Starch Octenyl Succinate Calcium (Trial Work) 14 Polygonal shape 50 0 6 0 Uncured 7 (Acrylate/ethylhexyl acrylate) cross-linked polymer (Techpolymer ACP-8C: Sekisui Chemicals Industrial Co., Ltd.) 8 porous spherical 30 12 8 50 4 9 Acrylic copolymer (Ganzpearl GBM-55COS: Aica Industrial Co., Ltd.) 8 core shell 30 93 10 50 30 11 Acrylate cross-linked polymer (Ganzpearl GMP-0820: Aica Industrial Co., Ltd.) 8 porous spherical 30 142 12 50 66 13 Methyl methacrylate cross-linked polymer (Ganzpearl GMP-0800: Aica Industrial Co., Ltd.) 8 porous spherical 30 72 14 50 57 15 Methyl methacrylate cross-linked polymer (Matsumoto Microsphere MHB-R: Matsumoto Oils & Fats Pharmaceutical Co., Ltd.) 15 hollow 30 80 16 50 68 17 Oil-containing methyl methacrylate cross-linked polymer (Matsumoto Microsphere M-311: Matsumoto Oils & Fats Pharmaceutical Co., Ltd.) 13 oval bowl shape 30 62 18 50 47 19 Nylon-6 (Nylon powder TR-1: Toray Co., Ltd.) 13 porous spherical 30 90 20 50 68 twenty one (Silicone/vinylsilicone) cross-linked polymer (Ganzpearl SIG-070: Aica Industrial Co., Ltd.) 7 True spherical 30 86 twenty two 50 55 twenty three Urethane resin (Granpar GU-1500: Aica Industrial Co., Ltd.) 15 True spherical 30 102 twenty four 50 78 25 (Styrene/DVB) copolymer (Ganzpearl GS-0605: Aica Industrial Co., Ltd.) 6 True spherical 30 50 26 50 twenty two

As shown in Table 1, the composite particles 1 to 3 of aluminum octenyl succinate starch and zinc oxide show that the oleic acid curing time is very fast and exhibit high sebum curing ability. In addition, the composite particles 5 of calcium octenyl succinate starch and zinc oxide also show that the oleic acid curing time is very fast and exhibits high sebum curing ability.

Next, use the composite particles 1 shown in Table 1 and the formula shown in Table 2 to prepare a compressed powder cake according to the usual practice.

(evaluation method) Three expert evaluators of makeup and cosmetics used Example 1 and Comparative Example 1 on half of the face, and evaluated the seborrhea after 3 hours in a room under high temperature and humidity. Through consensus, they evaluated which one is more superior based on the following criteria. .

[Seborrhea] 〇: Difficult to overflow sebum. ×: Easy to overflow sebum.

[Table 2] Element Example 1 Comparative example 1 Silicone treated microparticle titanium oxide 8 8 Pigment grade titanium oxide 10 10 Silicone treated talc Take the total amount as 100 Silicone treated mica 10 10 Fluoride treated mica 7 7 Microparticle zinc oxide (average particle size 25 nm) 15 15.6 Nylon powder 5 5 Polymethylmethacrylate 5 5 Composite particle 1 3 - Aluminum Octenyl Starch Succinate - 2.4 Silicone treatment of yellow iron oxide 2 2 Silicone treatment iron pill 0.6 0.6 Silicone treated black iron oxide 0.4 0.4 Silicone 5 5 Cross-linked silicone polymer 1.5 1.5 Cetyl ethylhexanoate 3 3 Ethylhexylmethoxysilosilicate 4 4 Phenoxyethanol 0.5 0.5 Tocopherol 0.1 0.1 seborrhea 〇 ×

As shown in Table 2, Example 1, which formulated composite particles, showed that it was not prone to sebaceous overflow.

Next, various cosmetics were prepared according to the following procedure using composite particles 1 to 3 shown in Table 1. [Example 2] Powder cake [Table 3] Element Blended amount (mass %) 1 Composite particle 1 5.0 2 Silicone treated titanium oxide 5.0 3 Silicone treated microparticle titanium oxide 10.0 4 Magnesium stearate 5.0 5 Silicone treated talc Take the total amount as 100 6 Silicone treatment of yellow iron oxide Appropriate amount 7 Silicone treatment iron pill Appropriate amount 8 Silicone treated black iron oxide Appropriate amount 9 polyalkyl acrylate 5.0 10 Silicone treated mica 15.0 11 Silicone 10.0 12 Alkane wax 1.0 13 2-ethylhexyl stearate 5.0

Preparation method: After mixing and homogenizing 1 to 10, heat and melt, add ingredients 11 to 13 at 75°C and knead. After crushing and sieving using an atomizer, it is pressed and formed in a gold plate.

[Example 3] Oily powder cake (condensed type) [Table 4] Element Blended amount (mass %) 1 Composite particle 1 5.0 2 Silicone treated talc Take the total amount as 100 3 Silicone treated mica 15.0 4 Silicone treatment of yellow iron oxide Appropriate amount 5 Silicone treatment iron pill Appropriate amount 6 Silicone treated black iron oxide Appropriate amount 7 paraffin wax 3.0 8 microcrystalline wax 6.0 9 peak wax 2.0 10 Vaseline 12.0 11 Squalane 6.0

Preparation method: After mixing and homogenizing 1 to 6, add ingredients 7 to 11 that have been heated and melted, and knead with a roller mill. Melt the kneaded product again, stir thoroughly to float the bubbles, then cool it, pour it into a container at 60°C, and let it cool and solidify.

[Example 4] Spot concealing stick [Table 5] Element Blended amount (mass %) 1 talc 5.8 2 kaolin Take the total amount as 100 3 Mica 3.0 4 yellow iron oxide Appropriate amount 5 Iron Dan Appropriate amount 6 black iron oxide Appropriate amount 7 Composite particles 2 4.0 8 titanium dioxide 6.0 9 paraffin wax 3.0 10 microcrystalline wax 7.0 11 Vaseline 15.0 12 Methyl phenyl polysiloxane 3.0 13 Squalane 5.0 14 Isopropyl palmitate 17.0

Preparation method: Melt 9 to 14 at 85°C and mix. Add the homogenized ingredients 1 to 8 while stirring. Grind and disperse it using a colloid mill, degas it, and then pour it into a container at 70° C. to cool it.

[Example 5] O/W emulsified powder cake [Table 6] Element Blended amount (mass %) 1 talc 3.0 2 yellow iron oxide Appropriate amount 3 Iron Dan Appropriate amount 4 black iron oxide Appropriate amount 5 Composite particles 3 3.0 6 kaolin 0.5 7 Monostearic acid polyoxyethylene sorbitan anhydride 0.9 8 Triethanolamine 1.0 9 propylene glycol 10.0 10 purified water Take the total amount as 100 11 stearic acid 2.2 12 Isocetyl alcohol 7.0 13 Glyceryl monostearate 2.0 14 liquid lanolin 2.0 15 flowing paraffin 8.0

Preparation method: Disperse 6 in 9, add 10, perform homogenizer processing at 70°C, add 7 and 8 and stir thoroughly. Add to mix and homogenize steps 1 to 5, and homogenize with a homogenizer. Ingredients 11 to 15 melted and homogenized by heating at 75°C are added, emulsified using a homogenizer, and then cooled.

[Example 6] W/O emulsified powder cake [Table 7] Element Blended amount (mass %) 1 sericite 10.0 2 yellow iron oxide Appropriate amount 3 Iron Dan Appropriate amount 4 black iron oxide Appropriate amount 5 Composite particle 1 2.0 6 Decamethylcyclopentasiloxane 12.0 7 Polyoxyethylene modified dimethylpolysiloxane 4.0 8 purified water Take the total amount as 100 9 1,3-butanediol 5.0 10 sodium chloride 2.0

Preparation method: Heat and melt 8 to 10, homogenize, add 1 to 5, and use a homogenizer to disperse homogeneously. Add the homogeneously melted ingredients 6 and 7, emulsify them using a homogenizer, and then cool them.

[Example 7] O/W emulsified sunscreen milk [Table 8] Element Blended amount (mass %) 1 Oxybenzone 2.0 2 Octyl p-methoxysilyl arsenate 5.0 3 Squalane 10.0 4 Vaseline 5.0 5 stearyl alcohol 3.0 6 stearic acid 3.0 7 Glyceryl monostearate 3.0 8 Polyethyl acrylate 1.0 9 purified water Take the total amount as 100 10 1,3-butanediol 7.0 11 Microparticle titanium oxide 3.0 12 Composite particles 3 2.0 13 Triethanolamine 1.0

Preparation method: After mixing 9 to 13, use a homomixer to homogeneously disperse, heat and melt, add ingredients 1 to 8 at 75°C, emulsify using a homomixer, and then cool.

[Example 8] W/O emulsified sunscreen lotion [Table 9] Element Blended amount (mass %) 1 Octyl p-methoxysilyl arsenate 5.0 2 Oxybenzone 3.0 3 4-tert-butyl-4'-methoxybenzoylmethane 1.0 4 Silicone treated microparticle titanium oxide 5.0 5 Composite particles 2 5.0 6 Squalane 20.0 7 Silicone Take the total amount as 100 8 Silicone resin 2.0 9 Glyceryl diisostearate 2.0 10 Organic modified montmorillonite 0.5 11 purified water 28.5 12 1,3-butanediol 5.0

Preparation method: After heating, melting and mixing 1 to 10, use a homogeneous mixer to homogeneously disperse them, add the homogeneously melted 11 and 12, use a homogeneous mixer to emulsify, and then cool.

Claims (7)

A cosmetic containing composite particles coated with zinc oxide in an amount of 0.05 to 2 parts by mass relative to 1 part by mass of starch octenyl succinate metal salt. The cosmetic of claim 1, wherein the composite particles are coated with zinc oxide in an amount of 0.1 to 1.5 parts by mass relative to 1 part by mass of starch octenyl succinate metal salt. The cosmetic of claim 1, wherein the metal salt of octenyl starch succinate is selected from the group consisting of sodium octenyl succinate starch, potassium octenyl starch succinate, and octenyl starch succinate. Magnesium ester, calcium starch octenyl succinate, barium starch octenyl succinate, copper starch octenyl succinate, aluminum starch octenyl succinate, starch octenyl succinate One or more of the group consisting of iron ester and zirconium octenyl starch succinate. The cosmetic of claim 3, wherein the metal salt of starch octenyl succinate includes aluminum starch octenyl succinate. The cosmetic according to any one of claims 1 to 4, wherein the average particle size of the above-mentioned starch octenyl succinate metal salt is 1 to 30 μm. The cosmetics according to any one of claims 1 to 4, wherein the average particle size of the zinc oxide is 10 to 200 nm. The cosmetic according to any one of claims 1 to 4, wherein the zinc oxide includes hydrophobized zinc oxide.