JP7733447B2 - cosmetics - Google Patents

Description

The present invention relates to cosmetics.

Skin develops age spots, wrinkles, sagging, pigmentation, and other conditions due to internal factors such as aging and stress, and external factors such as ultraviolet rays and dry air. In particular, morphological changes such as wrinkles and sagging have a significant impact on the skin's appearance, and many people desire to improve them. Many drugs have been proposed to prevent and improve these conditions. Among these, niacinamide is known to be highly safe and to have anti-aging effects for the skin (see, for example, Patent Documents 1 and 2). However, it is known that products containing large amounts of niacinamide can have undesirable textures, such as a sticky feeling, and although efforts have been made to improve this (see, for example, Patent Document 3), fully satisfactory effects have not been achieved.

Japanese Patent Application Publication No. 10-130135 Japanese Patent Application Publication No. 10-001414 Special Publication No. 2003-502435

The objective of the present invention is to provide cosmetic products that are plastic-free, yet have improved stickiness and a pleasant feel when used.

The present invention provides the following cosmetic preparation.
(1)
A cosmetic comprising the following (A) to (C):
(A) niacinamide; (B) fine particle metal oxide; (C) one or more selected from spherical silica, spherical cellulose, and spherical borosilicate particles; (2)
The cosmetic preparation according to claim 1, further comprising (D) panthenol.

The cosmetic product of the present invention is plastic-free, yet has an improved stickiness during use, providing a pleasant feel when used.

The following describes how to implement the present invention.

[Niacinamide]
Niacinamide used in the present invention is a water-soluble vitamin belonging to the vitamin B group, and is also called nicotinamide.

The niacinamide used in the present invention is not particularly limited in terms of its raw materials, manufacturing method, purification method, etc., as long as it is one that is commonly used in cosmetics.

The amount of niacinamide blended into the cosmetic of the present invention is 0.001 to 20% by mass, preferably 0.01 to 15% by mass, and more preferably 0.1 to 10% by mass, based on the total amount of the cosmetic.

[Fine particle metal oxide]
In the present invention, microparticles refer to particles having an average particle size in the range of approximately 10 nm to 200 nm. The average particle size is a volume-based average particle size and can be measured using a laser diffraction/scattering particle size distribution analyzer. Examples of microparticle metal oxides to be incorporated into the cosmetic of the present invention include microparticle titanium oxide, microparticle zinc oxide, microparticle zirconium oxide, and microparticle cerium oxide. Because of their excellent UV scattering effect, one or two types selected from microparticle titanium oxide and microparticle zinc oxide are preferred, with microparticle zinc oxide being particularly preferred due to its excellent UVA blocking effect. Furthermore, the shape of the microparticle metal oxide is not particularly limited, and it may be treated to be hydrophilic or hydrophobic.

The fine particle titanium dioxide can be any type commonly used in cosmetics. There are no particular limitations on the shape of the fine particle titanium dioxide. Furthermore, the particle size of the fine particle titanium dioxide is preferably, for example, an average primary particle size of 100 nm or less, and even 80 nm or less. The lower limit of the average particle size of the fine particle titanium dioxide is not particularly limited, but is typically around 30 nm. Fine particle titanium dioxide can be produced by standard methods such as the sulfuric acid method or the chlorine method, and commercially available products can also be used. Examples of commercially available fine particle titanium dioxide include the SIV series, TTO-55 series, and TTO-S series (all manufactured by Ishihara Sangyo Kaisha), as well as MT-100TV, MT-500V, and MT-01 (all manufactured by Teika Corporation).

Titanium dioxide fine particle particles can be used after the surface has been treated to be hydrophilic or hydrophobic, as needed. Examples of hydrophilic treatments include treatment with polyhydric alcohols such as glycerin, and hyaluronic acid. Examples of hydrophobic treatments include treatment with fluorine compounds, silicones, alkyls, alkylsilanes, metal soaps, water-soluble polymers, amino acids, N-acylamino acids, lecithin, organic titanates, polyols, acrylic resins, methacrylic resins, urethane resins, and fatty acids.

Fine particle titanium dioxide and/or surface-treated fine particle titanium dioxide can be incorporated directly into cosmetics, but if necessary, they can be used coated on the surface of other powders such as plate-like powders such as talc, mica, and sericite, or silica and spherical powders. By coating plate-like or spherical powders with fine particle titanium dioxide, aggregation of the fine particle titanium dioxide is reduced, resulting in high UV protection effects. Furthermore, by coating plate-like or spherical powders with fine particle titanium dioxide, the rough feeling that is characteristic of fine particle titanium dioxide when used is reduced, resulting in cosmetics that have a pleasant feel when used.

Fine particle titanium dioxide and/or its surface-treated fine particle titanium dioxide powder can be blended directly into cosmetics, but they can also be used after being pre-dispersed in oils such as silicone oils and hydrocarbon oils, or in aqueous components.

The fine particle zinc oxide can be any type commonly used in cosmetics, with no particular restrictions. The shape of the fine particle zinc oxide is not particularly limited. Examples of commercially available fine particle zinc oxide include FINEX-25, FINEX-30, and FINEX-50 (all manufactured by Sakai Chemical Industry Co., Ltd.), and MZ-300 and MZ-500 (all manufactured by Teika Corporation).

The surface of the zinc oxide particles can be hydrophilized or hydrophobized as needed. Examples of hydrophilization treatments include treatment with polyhydric alcohols such as glycerin, and hyaluronic acid. Examples of hydrophobization treatments include treatment with fluorine compounds, silicones, alkyls, alkylsilanes, metal soaps, water-soluble polymers, amino acids, N-acylamino acids, lecithin, organic titanates, polyols, acrylic resins, methacrylic resins, urethane resins, and fatty acids. Among these, fatty acid treatment is preferred, with isostearic acid treatment being particularly preferred.

Fine particle zinc oxide and/or its surface-treated fine particle zinc oxide can be incorporated directly into cosmetics, but if necessary, they can also be used in the form of a coating on the surface of other powders such as talc, mica, sericite, etc., plate-like powders, silica, spherical powders, etc.

Fine particle zinc oxide and/or its surface-treated fine particle zinc oxide powder can be blended directly into cosmetics, but they can also be used after being pre-dispersed in oils such as silicone oils and hydrocarbon oils, or in aqueous components.

The above-mentioned fine particle metal oxides may be used alone or in combination of two or more. The blending amount of the fine particle metal oxide in the present invention is preferably 0.1 to 30% by mass based on the total amount of the cosmetic. By using a fine particle metal oxide content of 0.1% by mass or more, the ultraviolet ray blocking effect of the fine particle metal oxide can be expected to be enhanced. By using a fine particle metal oxide content of 30% by mass or less, the feel during use can be made more pleasant.

From the perspective of protecting the global environment, it is preferable that the cosmetic composition of the present invention be plastic-free, and it contains one or more types selected from spherical silica, spherical cellulose, and spherical borosilicate particles.

[Spherical silica]
The spherical silica blended in the cosmetic of the present invention is also called silicic anhydride or silicon dioxide, and preferably has an average particle size measured by microscopy of 1 to 50 μm. The spherical silica may be porous, hollow, or non-porous. Commercially available spherical silica products include Godball E-6C, E-16C, D-11C, D-25C, D11-796C, E2-824C, Godball E-90C, ST Powder G-MG, and ST Powder G-MY (all manufactured by Suzuki Yushi Kogyo Co., Ltd.), Sunsphere NP-30, H-31, H-32, H-51, H-52, H-121, and H-162. -201, L-31, L-51, NP-30, NP-100, NP-200 (all manufactured by AGC Si-Tech Co., Ltd.), silica microbeads P-500, P-4000 (all manufactured by JGC Catalysts and Chemicals Co., Ltd.), silica beads SB-150, SB-300, SB-700, SB-705, SBNP-810 (all manufactured by Miyoshi Chemicals Co., Ltd.), and the like.

When spherical silica is incorporated into the present invention, it is preferable that the amount incorporated is 5 to 30% by mass based on the total amount of the cosmetic. If the amount incorporated is less than 5% by mass, a satisfactory feel during use may not be obtained.

[Spherical cellulose]
The spherical cellulose incorporated in the cosmetic of the present invention preferably has an average particle size of 1 to 50 μm as measured by microscopy. The spherical cellulose may be crystalline cellulose itself, or a cellulose derivative such as carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, or hydroxypropylmethyl cellulose. Commercially available products include CELLULOBEADS D-10 and CELLULOBEADS USF (both manufactured by Daito Kasei Kogyo Co., Ltd.).

When spherical cellulose is incorporated into the present invention, the amount incorporated is preferably 0.1 to 40% by mass, and more preferably 0.5 to 30% by mass, based on the total amount of the cosmetic.

In the present invention, the spherical silica and spherical cellulose may be surface-treated with a hydrophobic treatment agent. Examples of hydrophobic treatments include the following treatments, which can be used alone or in combination of two or more types, but are not limited to these.
(1) Treatment using silicones such as methylhydrogenpolysiloxane (trade name: Silicon KF99P, manufactured by Shin-Etsu Chemical Co., Ltd.), methylhydrogenpolysiloxane-dimethylpolysiloxane copolymer (trade name: Silicon KF-9901, manufactured by Shin-Etsu Chemical Co., Ltd.), dimethylpolysiloxane, branched silicone-based (ethoxy-functional) treatment agents described in JP-A 2001-72891 (trade names: KF9908, KF9909, manufactured by Shin-Etsu Chemical Co., Ltd.), and acrylic silicone treatment agent described in WO 2004/091563 (trade name: KP574, manufactured by Shin-Etsu Chemical Co., Ltd.).
(2) Treatment using an alkylalkoxysilane compound such as octyltriethoxysilane (manufactured by EVONIKDEGUSSA under the trade name of DYNASILANOCTEO), hexyltrimethoxysilane, or octadecyltriethoxysilane.
(3) Treatment with fatty acids such as palmitic acid and stearic acid.
(4) Alkyl sugar treatment such as dextrin palmitate in which some of the hydroxyl groups of dextrin are alkyl esterified; metal soap treatment using an alkali metal salt or alkaline earth metal salt of a fatty acid.
(5) Treatment with amino acids such as N-lauroyl-L-lysine, glutamic acid or its alkali salts, and acylated amino acids.
(6) Fluorine treatment using perfluoroalkyl phosphate diethanolamine salt, perfluoroalkyl phosphate, perfluorohexylethyltriethoxysilane, perfluorooctylethyltriethoxysilane, copolymers containing functional groups with perfluoroalkyl chain lengths of C4 to C6, etc.
(7) Treatment with a quaternary ammonium salt such as distearyldimethylammonium chloride.

[Spherical borosilicate particles]
The spherical borosilicate particles incorporated into the cosmetic of the present invention preferably have an average particle size of 0.1 to 20 μm. A size of 1 to 20 μm is particularly preferred, more preferably 5 to 15 μm, and even more preferably 7 to 13 μm. The average particle size of the spherical borosilicate particles can be measured as the number-average average particle size according to the shape of the powder particles using microscopy. The borosilicate in the spherical borosilicate particles may be an alkali metal salt such as Na or K, an alkaline earth metal salt such as Mg or Ca, an Al salt, or a combination of these salts. Preferred are sodium borosilicate, calcium borosilicate, aluminum borosilicate, (Ca/Na) borosilicate, and (Ca/Al) borosilicate, with (Ca/Na) borosilicate being more preferred. The spherical borosilicate particles may be hollow or solid, or a combination of these may be used, although solid borosilicate is preferred. The spherical borosilicate particles are labeled in cosmetics as borosilicate (Ca/Na) (CALCIUM SODIUM BOROSILICATE), borosilicate (Ca/Al) (CALCIUM LUMINUM BOROSILICATE), etc., but in the present invention, glass with either labeled name may be used, with borosilicate (Ca/Na) being more preferred. The spherical borosilicate particles may be used as they are, or may be subjected to a hydrophilization or hydrophobization treatment.

When spherical borosilicate particles are incorporated in the present invention, the amount of the particles is preferably 0.1 to 30% by mass, and more preferably 0.5 to 20% by mass, based on the total amount of the cosmetic.

[Panthenol]
The panthenol used in the present invention is a precursor of D-pantothenic acid (vitamin B5), and there are no particular limitations on the raw materials, production method, purification method, etc., as long as it is one that is commonly used in cosmetics.

When panthenol is blended into the cosmetic composition of the present invention, the blending amount is preferably 0.01 to 5% by mass, more preferably 0.05 to 5% by mass, and most preferably 0.3 to 1% by mass, based on the total amount of the cosmetic composition.

The uses of the cosmetic of the present invention are not particularly limited, but in terms of its effectiveness, it can be suitably used in makeup cosmetics such as foundations, base cosmetics, and sunscreen cosmetics.

In addition to the above-mentioned components, the cosmetic of the present invention can contain optional ingredients used in ordinary cosmetics and quasi-drugs to the extent that they do not impair the effects of the present invention. Specific examples include UV absorbers, UV scattering agents, oils, surfactants, thickeners, preservatives, fragrances, colorants, moisturizers, antioxidants, anti-inflammatory agents, and antibacterial agents.

The formulation of the cosmetic of the present invention is not particularly limited, and may be any formulation, such as water-based, oil-based, or emulsion-type.

The cosmetic preparation of the present invention can be prepared by conventional methods.

The present invention will be explained in more detail below using examples, but the scope of the present invention is not limited by these examples. In the following examples, the blending amounts are expressed in mass % unless otherwise specified.

[Usage evaluation]
Four sensory evaluation specialists independently used the cosmetics according to the Examples and Comparative Examples and conducted the following evaluations by consensus.

[Evaluation criteria] Stickiness/non-stickiness: ◎
Almost no stickiness: 〇 Slightly sticky: △
Sticky: ×

Cosmetics serving as examples of the present invention and comparative examples were prepared by conventional methods using the formulations shown in Table 1.

As shown in Table 1, the cosmetic product of the present invention was free of microplastics, yet had a good feel when used, with improved stickiness.

Claims (4)

A water-based or emulsion-type (excluding water-in-oil type) cosmetic preparation containing the following (A) to (D):
(A) Niacinamide: 5% by mass or more (B) Fine particle metal oxide having an average particle size of 10 to 200 nm (C) Spherical silica, spherical cellulose, and spherical borosilicate particles
(D) Panthenol The cosmetic preparation according to claim 1, wherein the (D) panthenol is present in an amount of 0.3 to 1% by mass. 3. The cosmetic preparation according to claim 1, wherein (B) contains finely divided zinc oxide particles having an average particle size of 10 to 200 nm. The cosmetic according to claim 1 , wherein the content of (B) is 6.5% by mass or more relative to the total mass of the cosmetic.