JP7046619B2 - Oil-in-water cosmetic composition - Google Patents

Description

The present invention has an oil-in-water cosmetic composition that improves the firmness and elasticity of the skin, has improved usability such as no stickiness, and suppresses creaming over time, and is impregnated with a non-woven fabric. It relates to a sheet-like cosmetic product in which separation (occurrence of oil unevenness) over time is suppressed.

The skin causes stains, wrinkles, sagging, pigmentation, etc. due to internal factors such as aging and stress, and external factors such as ultraviolet rays and dry air. Among them, morphological changes such as wrinkles and sagging greatly affect the impression of appearance, so many people want to improve it. Many drugs have been proposed to prevent and improve these wrinkles and sagging. Under these circumstances, nicotinamide is a vitamin and is known to be highly safe and have an anti-aging effect on the skin (Patent Document 1). However, it is known that when a large amount of nicotinamide is contained, there is an undesired feeling of use such as stickiness, and this has been improved (Patent Document 2).
On the other hand, sheet-shaped cosmetics are intended to impart sufficient moisture and active ingredients to the skin and impart moisturizing and skin-beautifying effects by impregnating a support such as a non-woven fabric with a cosmetic solution and allowing it to act on the skin for a long time. It is being used and the market is expanding. Specifically, a non-woven fabric-impregnated cosmetic having a non-woven fabric impregnated with a water-soluble polymer and a polyhydric alcohol has been proposed (Patent Document 3).

Japanese Unexamined Patent Publication No. 10-130135 Special Table 2003-502435 Gazette Japanese Unexamined Patent Publication No. 10-279429 Japanese Unexamined Patent Publication No. 2007-176810

Patent Document 2, which attempts to suppress the stickiness of nicotinic acid amide, is a technique containing both branched-chain hydrocarbons and highly expandable oils such as liquid ester emollients, but the effect is insufficient. There was a problem that creaming occurred over time when the content of the oil was high.

In addition, sheet-like cosmetics impregnated with a composition containing a high concentration of nicotinamide, which can be expected to give elasticity and elasticity to the skin, at a high concentration of 1 to 10% by mass can be expected to have a further skin-beautifying effect. There are only a few (Patent Document 4). The sheet-shaped cosmetic is characterized in its usage, and is attached to the application site for several tens of seconds to several tens of minutes. Therefore, the influence of volatilization such as water during use (when the seat is attached) becomes large, and the degree of stickiness of nicotinamide deteriorates severely. Therefore, in order to improve the stickiness during use, when the liquid oil agent was contained in the nicotinamide-containing composition used for the sheet-shaped cosmetics, the stickiness was improved to some extent, but the sheet was impregnated. The nicotinamide-containing composition was separated over time, causing new problems such as oil unevenness.

In view of this situation, the present inventor has conducted diligent research to solve the above problems, and as a result, the polyoxyethylene-added castor oil together with nicotinic acid amide in an amount of 1 to 10% by mass based on the total mass of the composition. , Polyoxyethylene-added sorbit fatty acid ester, and liquid oil, and the content mass ratio of component (B) and component (C) to component (D): {(B) + (C)} / ( The oil-in-water cosmetic composition having D) of 1/10 to 10 has an excellent effect of imparting elasticity and elasticity to the skin, has an improved feeling of use such as no stickiness, and suppresses creaming over time. I found that.
Again, when the above-mentioned oil-in-water cosmetic composition has an average particle size of 500 nm or less and contains a polysaccharide thickener, preferably xanthan gum, the effect of imparting firmness and elasticity to the skin is particularly remarkable. It was found that it has an improved feeling of use such as excellent and non-sticky, and that creaming over time is suppressed.
Further, the above-mentioned composition for oil-in-water cosmetics is excellent in imparting elasticity and elasticity to the skin when impregnated into a non-woven fabric, and has improved stickiness during use. It was found that the separation (occurrence of oil unevenness) was suppressed, and the present invention was completed.

That is, in the present invention, the following components (A) to (D):
(A) Nicotinamide 1-10% by mass
(B) Polyoxyethylene addition type castor oil (C) Polyoxyethylene addition type sorbitol fatty acid ester (D) Containing a liquid oil agent,
A composition for oil-in-water cosmetics in which the content mass ratio of the component (B) and the component (C) to the component (D): {(B) + (C)} / (D) is 1/10 to 10. ..
Further, in the oil-in-water cosmetic composition of the present invention, the average particle size of the emulsified droplets may be 500 nm or less.
Further, in the present invention, the component (B) may be one or more selected from the polyoxyethylene-added castor oil having an average added mole number of oxyethylene of 10 to 60.
Further, in the present invention, the component (C) may be one or more selected from the polyoxyethylene-added sorbitol fatty acid ester in which the average number of moles of oxyethylene added is 10 to 60.
Further, the present invention may contain a component (E) polysaccharide thickener.
Further, in the present invention, the component (E) may be xanthan gum.
Further, in the present invention, the content mass ratio of the component (A) to the component (D): (A) / (D) may be 0.15 to 0.5.
Further, the present invention may be a sheet-shaped cosmetic product obtained by impregnating a non-woven fabric with the oil-in-water cosmetic composition.

INDUSTRIAL APPLICABILITY According to the present invention, the firmness and elasticity of the skin are improved, morphological changes of aging such as wrinkles and sagging are prevented and improved, and the skin has a good feeling of use such as no stickiness, and creaming over time is suppressed in water. Provided are an oil-type cosmetic composition and a sheet-like cosmetic in which separation (occurrence of oil unevenness) over time in a non-woven fabric impregnated state is suppressed.

It is a figure which shows the result of "evaluation item: evaluation of oil unevenness with time of the impregnated composition" in Example 1 and Comparative Example 3 in Table 1. FIG. Specifically, after storing Example 1 and Comparative Example 3 in a state of being impregnated in the non-woven fabric for one month under a temperature condition of 50 ° C., the non-woven fabric was taken out from the packaging tool, spread over the entire surface, and the appearance was photographed. Is.

Hereinafter, the configuration of the present invention will be described in detail. The numerical range represented by using "-" in the present specification means a range including the numerical values before and after "-" as the lower limit value and the upper limit value.

[Ingredient (A)]
The component (A) nicotinic acid amide in the present invention is an amide compound of nicotinic acid (vitamin B3 / niacin). Nicotinamide is a water-soluble vitamin, which is a known substance that is one of the B vitamins, and can be extracted from natural products (rice bran, etc.) or synthesized by a known method. Specifically, those listed in the 15th revised Japanese Pharmacopoeia 2008 can be used.

In the present invention, the content of the component (A) is 1 to 10% by mass and 3 to 10% by mass in the oil-in-water cosmetic composition in order to improve the firmness and elasticity of the skin and suppress stickiness. Is preferable, and 4 to 9% by mass is particularly preferable. If the content of the component (A) is less than 1% by mass, the effect of imparting elasticity and elasticity to the skin is not excellent, and if it exceeds 10% by mass, the skin becomes very sticky and the feeling of use is poor.

[Component (B)]
The component (B) polyoxyethylene-added castor oil in the present invention is castor oil, hydrogenated castor oil to which ethylene oxide is added, or a surfactant to which fatty acid is further added. The average number of moles of oxyethylene added is preferably 10 to 60 mol, more preferably 10 to 40 mol. Specifically, polyoxyethylene (10-60EO.) Castor oil, polyoxyethylene (10-60EO.) Hardened castor oil, monolauric acid polyoxyethylene (10-60EO.) Hardened castor oil. , Monoisostearate polyoxyethylene (10-60EO.) Hardened castor oil, triisostearate polyoxyethylene (10-60EO.) Hardened castor oil and the like, and one or more of these may be used as appropriate. It can be selected and used. Examples of commercially available products include Nikkor CO series, Nikkor HCO series (above, manufactured by Nikko Chemicals Co., Ltd.), Emarex RWL series, Emarex RWIS series (above, manufactured by Nippon Emulsion Co., Ltd.) and the like.

[Component (C)]
The component (C) polyoxyethylene-added sorbit fatty acid ester in the present invention is a surfactant obtained by adding ethylene oxide to sorbitol and further adding a fatty acid. The average number of moles of oxyethylene added is preferably 10 to 60 mol, more preferably 30 to 60 mol. Specific examples thereof include polyoxyethylene tetraoleate (10 to 60 EO) sorbitol, polyoxyethylene tetrastearate (10 to 60 EO) sorbitol, and the like, and one or more of these may be used as appropriate. It can be selected and used. Examples of commercially available products include Nikkor GO series and Nikkor GS series (all manufactured by Nikon Chemicals Co., Ltd.).

The contents of the component (B) and the component (C) in the present invention are not particularly limited, but are preferably 0.1 to 10% by mass, more preferably 0, in the oil-in-water cosmetic composition, respectively. .5 to 5% by mass. Within this range, various oils used in cosmetics can be emulsified better, and not only the stability of the composition for oil-type cosmetics in water is improved, but also the composition for oil-type cosmetics in water is improved. The stickiness of things is also improved.

[Component (D)]
As the component (D) liquid oil agent in the present invention, any oil agent that is liquid at 25 ° C. can be used without particular limitation as long as it is usually used for cosmetics. For example, regardless of the origin of animal oils, vegetable oils, synthetic oils, etc., oils such as hydrocarbons, oils and fats, ester oils, higher alcohols, higher fatty acids, silicone oils, fluorine-based oils, lanolin derivatives, etc. Can be mentioned. More specifically, hydrocarbons such as liquid paraffin, heavy liquid isoparaffin, α-olefin oligomer, squalane, polyisobutylene and polybutene, fats and oils such as olive oil, castor oil and macadamian nut oil, jojoba oil and adipic acid. Diisobutyl, 2-hexyldecyl adipate, di-2-heptylundecyl adipate, alkylglycol monoisostearate, isocetyl isostearate, trimethylolpropane triisostearate, ethyleneglycol di-2-ethylhexanoate, 2-ethylhexane Cetyl acid, neopentyl glycol di-2-ethylhexanoate, trimethylolpropane tri-2-ethylhexanoate, pentaerythritol tetra-2-ethylhexanoate, cetyl octanoate, oleyl oleate, octyldodecyl oleate, oleic acid Decyl, neopentyl glycol dicaprate, triethyl citrate, 2-ethylhexyl succinate, ethyl acetate, butyl acetate, isocetyl stearate, butyl stearate, diisopropyl sebacate, di-2-ethylhexyl sebacate, cetyl lactate, myristyl lactate, Isopropyl palmitate, 2-ethylhexyl palmitate, 2-hexyldecyl palmitate, 2-heptylundecyl palmitate, dipentaerythritol fatty acid ester, isopropyl myristate, isopropyl palmitate, 2-octyldodecyl myristate, 2-myristate Hexyldecyl, myristyl myristate, hexyldecyl dimethyloctanoate, ethyl laurate, hexyl laurate, N-lauroyl-L-glutamic acid-2-octyldodecyl ester, diisostearyl malate, glyceryl triisooctanoate, glyceryl triisostearate , Diglyceryl diisostearate, diglyceryl triisostearate, diglyceryl tetraisostearate, decaglyceryl decisostearate, glyceryl triisopalmitate, glyceryl trimyristate, diglyceryl myriostate and other esters, N-lauroyl- Amino acid oils such as di-glutamate (phytostearyl 2-octyldodecyl), octyldodecanol (2-octyldodecanol), 2-hexyldecanol, 2-decyltetradecanol, oleyl alcohol, isostearyl alcohol, isosetyl alcohol , Higher alcohols such as coconut alcohol, olive alcohol, jojoba alcohol and decyltetradecyl alcohol, higher fatty acids such as isostearic acid, isopalmitic acid, oleic acid, linoleic acid, linolenic acid, dimethylpolysiloxane, methylphenylpolysiloxane, Silicone oils such as decamethylcyclopentasiloxane, octamethylcyclotetrasiloxane, alkoxy-modified organopolysiloxane, fluorine-modified silicone, fluorine-based oils such as perfluoropolyether, lanolin, lanolin acetate, lanolin fatty acid isopropyl, lanolin alcohol, etc. Examples of the lanolin derivative of the above, and one or more of these can be used.

In the present invention, the liquid of the component (D) liquid oil in the "oil that is liquid at 25 ° C" means that the viscosity at 25 ° C is 20000 mPa · s or less, and the viscosity is B-type viscosity at 25 ° C. It can be measured using a rotor No. 2 or 3 with a meter. The viscosity of the liquid oil component (D) at 25 ° C. is preferably 10 to 10000 mPa · s, more preferably 20 to 1000 mPa · s, and even more preferably 20 to 20 in terms of non-stickiness and good emulsification stability. It is 400 mPa · s.

The content of the component (D) liquid oil agent in the present invention is not particularly limited, but is preferably 0.5 to 30% by mass, more preferably 1 to 25% by mass, and further, in the composition for oil-type cosmetics in water. It is preferably 2 to 20% by mass. Within this range, the liquid oil preparation of the component (D) in the present invention can be emulsified better, not only the stability is better, but also the stickiness of the oil-in-water cosmetic composition is improved.

In the present invention, the content mass ratio of the component (B) and the component (C) to the component (D): {(B) + (C)} / (D) is the emulsion stability of the oil-in-water cosmetic composition. , And, from the viewpoint of suppressing stickiness during use, it is 1/10 to 10, preferably 1/5 to 8, and more preferably 1/4 to 7. On the other hand, when the content mass ratio of the component (B) and the component (C) to the component (D) in the present invention: {(B) + (C)} / (D) is less than 1/10, the oil-in-water type The emulsion stability of the cosmetic composition is poor, and if it exceeds 10, the stickiness during use is terrible.

In the present invention, the content mass ratio of the component (A) and the component (D): (A) / (D) is not particularly limited, but is not sticky and the impregnated composition has oil unevenness over time. It is preferably 0.15 to 0.5, more preferably 0.2 to 0.4. In the component (D) that can be present in the aqueous phase and the component (D) that can be present in the oil phase, when their content mass ratio: (A) / (D) is a specific value, the component (A) is peculiar. Stickiness can be unexpectedly suppressed by component (D). Further, when the content mass ratio: (A) / (D) is a specific value, the oil unevenness of the impregnated composition due to the separation of the oily component containing the component (D) over time is also related to the component (A). Can be suppressed by working effectively at the emulsified interface.

The component (D) in the present invention is selected from higher alcohols that are liquid at 25 ° C and higher fatty acids and salts thereof that are liquid at 25 ° C from the viewpoint of imparting elasticity and elasticity to the skin and suppressing stickiness during use. It is preferable to include one kind or two or more kinds of alcohols. The content of one or more selected from the higher alcohol liquid at 25 ° C. and the higher fatty acid and its salt liquid at 25 ° C. is preferably 0 in the oil-in-water cosmetic composition. It is 001 to 5% by mass, more preferably 0.005 to 3% by mass, and even more preferably 0.01 to 2% by mass.
The "higher" of the higher alcohol and the higher fatty acid has 6 or more carbon atoms, preferably 8 to 30 carbon atoms, more preferably 8 to 22 carbon atoms, and further preferably 12 to 22 carbon atoms. Further, it may be linear or branched, saturated or unsaturated.
Higher alcohols that are liquid at 25 ° C. include, for example, octyldodecanol (2-octyldodecanol), 2-hexyldecanol, 2-decyltetradecanol, oleyl alcohol, isostearyl alcohol, isosetyl alcohol, coconut alcohol, olive alcohol, etc. Examples thereof include jojoba alcohol and decyltetradecyl alcohol. Of these, octyldodecanol is preferable in terms of improving stickiness.
Examples of the higher fatty acid liquid at 25 ° C. include isostearic acid, isopalmitic acid, oleic acid, linoleic acid, linolenic acid and the like. Of these, oleic acid, isostearic acid, and linoleic acid are preferable in terms of improving stickiness.

[Ingredient (E)]
As the component (E) polysaccharide thickener in the present invention, naturally occurring polysaccharides, naturally occurring polysaccharides and modified products thereof can be used. Specifically, the component (E) polysaccharide thickener is preferably a polysaccharide whose repeating unit is selected from glucose, galactose, mannose, and glucuronic acid. It is not particularly limited as long as it is usually used for cosmetics, and specific examples thereof include starch, guar gum, locust bean gum, glucomannan, cellulose, starch, guar gum, locust bean gum, xanthan gum, and carrageenan. Examples of the cellulose derivative include carboxymethyl cellulose, sodium carboxymethyl cellulose, methyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropylmethyl cellulose and the like. These polysaccharide thickeners can be used alone or in combination of two or more. Xanthan gum and carboxymethyl cellulose are among the polysaccharide thickeners from the viewpoint of improving the creaming of the oil-in-water cosmetic composition of the present invention and the separation over time (occurrence of oil unevenness) in the state of impregnated with a non-woven fabric. , Sodium Carboxymethyl Cellulose, Hydroxypropyl Methyl Cellulose are preferred. Among them, xanthan gum is more preferable in order to improve separation (occurrence of oil unevenness) over time in a non-woven fabric impregnated state.

The content of the component (E) polysaccharide thickener in the present invention is not particularly limited, but is preferably 0.01 to 0.5% by mass, more preferably 0. It is 02 to 0.2% by mass, more preferably 0.02 to 0.15% by mass. Within this range, the creaming of the oil-in-water cosmetic composition of the present invention and the separation over time (occurrence of oil unevenness) in the non-woven fabric impregnated state are improved.

[Other ingredients]
The composition for oil-in-water cosmetics of the present invention contains water, a polyhydric alcohol, and a component (B) as components contained in ordinary cosmetics, if necessary, as long as the effects of the present invention are not impaired. And surfactants other than component (C), oils (waxes, etc.) other than component (D), thickeners other than component (E), film-forming agents, moisturizers, antioxidants, anti-fading agents, cosmetology Ingredients, preservatives, stabilizers, pH adjusters, pigments, fragrances and the like can be appropriately contained for imparting various effects.

The water that can be contained in the oil-in-water cosmetic composition of the present invention includes so-called water such as deionized water, distilled water, purified water, hot spring water, and plant-derived steam distilled water such as rose water and lavender water. Can be mentioned.

[form]
The oil-in-water cosmetic composition of the present invention can be used as a beauty essence, sunscreen, hair styling product, antiperspirant, cleansing, fragrance, fragrance, deodorant and the like.

The oil-in-water cosmetic composition of the present invention can be used as a sheet-like cosmetic by impregnating a non-woven fabric with the oil-in-water cosmetic composition. The sheet-shaped cosmetics impregnated with the composition for oil-in-water cosmetics of the present invention can impart sufficient moisture and active ingredients to the skin, and can impart moisturizing and emollient effects, as well as skin-beautifying effects such as firmness and elasticity. It is preferable in terms of points.

The non-woven fabric impregnated with the oil-in-water cosmetic composition of the present invention is a sheet entwined without weaving fibers such as natural fibers and synthetic fibers, and can be manufactured by either a wet manufacturing method or a dry manufacturing method. The non-woven fabric obtained by the method may be used. Examples of the fiber used for the non-woven fabric include cotton, wool, linen, pulp, silk, rayon, nylon, polyester, polypropylene, acrylic fiber, vinylon, aramid fiber and the like, and one or more of these may be used as required. It can be appropriately selected and used. Among these, cotton and / or rayon are preferable in terms of stability and adhesion to the skin.

The nonwoven fabric impregnated with the oil-in-water cosmetic composition of the present invention has a thickness of 0.5 to 10 mm per sheet material and is impregnated after impregnation in terms of ease of adhesion and peeling during use. The mass per sheet material is preferably 15 g or less, more preferably 0.7 to 5 mm in thickness and 10 g or less in mass. The basis weight of the sheet material used in the present invention is preferably 15 to 300 g / m ² and more preferably 30 to 120 g / m ² in terms of adhesion and suppression of peeling during use. Further, the area of one sheet material is preferably 1 to 400 cm ² in terms of ease of sticking and peeling when sticking to the site to be used. The amount of the composition for oil-in-water cosmetics of the present invention impregnated into the nonwoven fabric is preferably 2 to 15 times, more preferably 3 to 10 times the amount of the sheet material to be impregnated. The method for impregnating the nonwoven fabric with the oil-in-water cosmetic composition of the present invention is not particularly limited, and known means can be used.

[Average particle size]
The average particle size of the emulsified particles of the oil-in-water cosmetic composition of the present invention is preferable in terms of improving stickiness, suppressing creaming over time, and suppressing separation (occurrence of oil unevenness) over time in a non-woven fabric impregnated state. , 500 nm or less, more preferably 300 nm or less. The average particle size of the emulsified droplet can be measured using a particle size distribution measuring device (for example, Submicron Particle Analyzer N5 BECKMAN COULTER) by a laser diffraction / scattering method.

[Production method]
The method for producing an oil-in-water cosmetic composition of the present invention is a conventional method for producing a cosmetic composition, specifically, a dispersion emulsification method, a phase inversion emulsification method, a gel emulsification method, or a phase inversion method. Although it can be prepared by a temperature emulsification method or the like, it is preferable to apply the phase inversion temperature emulsification method in terms of convenience and stability.

Hereinafter, the present invention will be described in more detail with reference to examples. It should be noted that these do not limit the present invention in any way.

(Preparation of Examples 1 to 15 and Comparative Examples 1 to 6)
Compositions for oil-in-water cosmetics were prepared by the composition shown in Table 1 and the following production method, evaluated by the following method, and the results are also shown.

(Production method)
<Phase inversion temperature emulsification method: Examples 1, 3 to 15, Comparative Examples 1 to 6>
A: Ingredients 2 to 12 are mixed and dissolved at 80 ° C.
B: Component 19 is heated to 80 ° C.
C: A part of B is added to A to obtain an oil-in-water emulsion (phase inversion temperature: 60 ° C.).
The balance of component 1, component 13-18, and component 19 was added to D: C and mixed to obtain an oil-in-water cosmetic composition.
<Dispersed emulsification method: Example 2>
A: Ingredients 2 to 12 are mixed and dissolved at 80 ° C.
B: Component 19 is heated to 80 ° C.
C: Add A to B to obtain an oil-in-water emulsion.
Ingredients 1 and 13 to 18 were added to D: C and mixed to obtain an oil-in-water cosmetic composition.

(Evaluation item)
stomach. Average particle size b. Skin firmness and elasticity. No stickiness 2. Emulsification stability e. Oil unevenness of the impregnated composition over time

(Evaluation methods)
(B. Average particle size)
The average particle size of each sample was measured with a particle size distribution measuring device (submicron particle analyzer N5 BECKMAN COULTER) by a laser diffraction / scattering method, and evaluated according to the following evaluation criteria.
Evaluation criteria
(Judgment): (Evaluation result)
A: 500 nm or less
B: More than 500 nm and 1.0 μ or less
C: More than 1.0μ and less than 5.0μ
D: Those exceeding 5.0μ

[About b and c (sensory evaluation)]
We selected 10 specialized panels that were trained in sensory evaluation by women in their 20s and 40s and could be evaluated according to certain criteria.
Two minutes after applying each sample (3 ml) to the entire face, the firmness, elasticity, and non-stickiness of the skin are evaluated on a five-point scale according to the following evaluation criteria, and grades are given. The average value was calculated from the total score, and the judgment was made according to the following four-step judgment criteria.

(B. Evaluation of skin firmness and elasticity)
Evaluation Criteria (Score): (Evaluation)
5 points: I feel that the skin is very firm and elastic 4 points: I feel that the skin is firm and elastic 3 points: I feel that the skin is slightly firm and elastic 2 points: I feel that the skin is very firm and elastic 1 point: I do not feel that the skin is firm and elastic 4-step criteria (judgment): (average score)
◎: Exceeding 4 points: Very good ○: Exceeding 3 points and 4 points or less: Good △: Exceeding 2 points and 3 points or less: Slightly defective ×: 2 points or less: Defect

(C. Evaluation of non-stickiness)
Evaluation Criteria (Score): (Evaluation)
5 points: No stickiness 4 points: Almost no stickiness 3 points: Slightly sticky 2 points: Very sticky 1 point: Very sticky 4 grade criteria (judgment): (Average score)
◎: Exceeding 4 points: Very good ○: Exceeding 3 points and 4 points or less: Good △: Exceeding 2 points and 3 points or less: Slightly defective ×: 2 points or less: Defect

(D. Evaluation of emulsification stability)
After storing each sample of Examples 1 to 15 and Comparative Examples 1 to 6 under a temperature condition of 50 ° C. for 1 month, the change in appearance was visually observed and judged according to the following three-step judgment criteria.
Three-stage judgment criteria (judgment): (evaluation result)
◎: No creaming / oil floating is observed, uniform: Very good ○: Slight creaming is observed but no oil floating is observed: Good ×: Creaming is observed and some oil floating is also observed: Defective

(E. Evaluation of oil unevenness of impregnated composition over time)
When Examples 1 to 15 and Comparative Examples 1 to 6 were made into sheet-like cosmetics by the following {filling method}, the state change of the impregnated oil-in-water cosmetic composition with time was evaluated. Specifically, each sheet-shaped cosmetic is placed vertically (placed so that the surface to which the non-woven fabric is attached is perpendicular to the ground), stored under a temperature condition of 50 ° C. for one month, and then from the packaging tool. When the non-woven fabric was taken out and spread over the entire surface, the state change of the impregnated oil-in-water cosmetic composition was visually observed and judged according to the following three-step criteria. In addition, in order to make separation (oil unevenness) easier to see, coenzyme Q10 (manufactured by Kaneka Corporation, Kaneka Coenzyme Q10) is contained in the all-water oil-type cosmetic composition in an amount of 0.2% by mass as an oil-based colorant. , The oil phase was colored.

{Filling method}
450 g of each of the oil-in-water cosmetic compositions of Examples 1 to 15 and Comparative Examples 1 to 6 obtained by the <phase inversion temperature emulsification method> and the <dispersion emulsification method> of (manufacturing method) is folded at the center. A sheet-shaped cosmetic was obtained by filling and enclosing in a bag-shaped container made of polyethylene terephthalate containing 30 sheets of non-woven fabric (material: cotton, thickness: 1 mm, grain: 100 g / m ² , area: 200 cm ² ). ..

Three-level judgment criteria (score): (evaluation)
⊚: Separation (oil unevenness) was not observed in the oil-in-water cosmetic composition impregnated with the non-woven fabric, and uniform: very good. ○: Separation (oil) in the oil-in-water cosmetic composition impregnated in the non-woven fabric. No unevenness), but slight haze is observed: Good ×: Separation (oil unevenness) is observed in the oil-in-water cosmetic composition impregnated in the non-woven fabric: Defective

As is clear from the results in Table 1, Examples 1 to 15 have an excellent skin firmness and elasticity-imparting effect, less stickiness during use, and good emulsification stability as compared with Comparative Examples 1 to 6. Further, even when the non-woven fabric was impregnated, the occurrence of oil unevenness over time was suppressed.
Comparative Example 1 containing no component (A) was inferior in the firmness / elasticity of the skin and the lack of stickiness.
Comparative Example 2 containing no component (D) and containing cholesterol was inferior in skin firmness / elasticity, non-stickiness, emulsification stability, and oil unevenness of the impregnated composition over time.
Comparative Examples 3 and 4 containing no component (B) and component (C) were inferior in skin firmness / elasticity, no stickiness, and oil unevenness of the impregnated composition over time.
Comparative Example 5 in which the content mass ratio: {(B) + (C)} / (D) exceeded 10, was inferior in the firmness / elasticity of the skin and the lack of stickiness.
Comparative Example 6 which did not contain the component (D) and contained cholesterol was inferior in the firmness / elasticity of the skin and the lack of stickiness.

Further, in Examples 1 to 15, it was surprising that the occurrence of oil unevenness in the impregnated composition over time was suppressed. The reason is that, in Table 1, in terms of emulsion stability, Comparative Examples 3 and 4 were "very good" and "good", respectively, but the oil unevenness of the impregnated composition over time was observed. In, both Comparative Examples 3 and 4 were "defective". That is, even when the oil-in-water cosmetic composition alone has good emulsification stability over time, the oil unevenness of the nonwoven fabric impregnated composition over time is not always suppressed. That is, in the emulsified composition, it can be said that the storage environment is remarkably different between the state of impregnating the non-woven fabric and the state of not impregnating the non-woven fabric. Under such circumstances, in Examples 1 to 15 of the present invention, the occurrence of oil unevenness over time of the nonwoven fabric impregnated composition was suppressed.

Example 16: Essence (ingredient) (% by mass)
1. 1. Nicotinamide 4.0
2. 2. Polyoxyethylene-added castor oil (10EO) 1.0
3. 3. Polyoxyethylene sorbitol tetraoleate (60EO) 0.5
4. Trimethylolpropane triisostearate 0.5
5. Isononyl isononanoate 0.2
6. Jojoba oil 10.0
7. Ceramide 2 0.1
8. Astaxanthin 0.1
9. Tocopherol 0.01
10.1,3-butylene glycol 12.0
11. Glycerin 5.0
12. Methyl paraoxybenzoate 0.05
13. Acrylic acid / methacrylic acid alkyl copolymer (Note 1) 0.15
14. Xanthan gum 0.1
15. Sodium hydroxide 2% solution 0.2
16. Fragrance 0.1
17. Remaining amount of purified water (Note 1) Carbopol 1382 polymer (manufactured by LUBRIZOL ADVANCED MATERIALS)

(Production method)
A: Component 17 is heated to 80 ° C.
B: Ingredients 2 to 9 are uniformly dissolved and mixed at 80 ° C.
A part of A is added to C: B, and an oil-in-water emulsion is obtained by a phase inversion temperature emulsification method (phase inversion temperature: 60 ° C.).
D: Add the balance of component 1, component 10 to 16, and component 17 to C and mix.
The beauty essence of Example 16 was excellent in skin firmness / elasticity, non-stickiness, and emulsification stability.

Example 17: Toner for scalp (ingredient) (% by mass)
1. 1. Nicotinamide 6.0
2. 2. Polyoxyethylene-added castor oil (40EO) 1.0
3. 3. Polyoxyethylene sorbitol tetraoleate (40EO) 0.7
4. Macadamia nut oil 2.0
5. Isononyl isononanoate 1.0
6. Liquid paraffin 8.0
7. Ceramide 3 0.1
8. Glyceryl caprylate 0.05
9. Tocopherol 0.01
10.1,3-butylene glycol 12.0
11. Glycerin 5.0
12. Methyl paraoxybenzoate 0.05
13. Xanthan gum 0.1
14. Sodium hydroxide 2% solution 0.2
15. Succinic acid 0.01
16. Sodium lactate 0.01
17. Fragrance 0.1
18. Remaining amount of purified water

(Production method)
A: Component 18 is heated to 80 ° C.
B: Ingredients 2 to 9 are uniformly dissolved and mixed at 80 ° C.
A part of A is added to C: B, and an oil-in-water emulsion is obtained by a phase inversion temperature emulsification method (phase inversion temperature: 60 ° C.).
D: Add the remainder of component 1, component 10 to 17, and component 18 to C and mix.
The scalp lotion of Example 17 was excellent in skin firmness / elasticity, non-stickiness, and emulsification stability.

Example 18: Pack cosmetics (ingredients) (% by mass)
1. 1. Nicotinamide 6.0
2. 2. Polyoxyethylene-added castor oil (40EO) 0.9
3. 3. Polyoxyethylene sorbitol tetraoleate (40EO) 0.9
4. Macadamia nut oil 0.3
5. Isononyl isononanoate 1.0
6. Liquid paraffin 10.0
7. Vaseline 0.01
8. Cyclohexane-1,4-dicarboxylic acid bisethoxydiglycol 0.02
9. Tocopherol 0.01
10.1,3-butylene glycol 10.0
11. Glycerin 6.0
12. Methyl paraoxybenzoate 0.02
13. Xanthan gum 0.15
14. Citric acid 0.02
15. Sodium lactate 0.01
16. Fragrance 0.1
17. Remaining amount of purified water

(Production method)
A: Component 17 is heated to 80 ° C.
B: Ingredients 2 to 9 are uniformly dissolved and mixed at 80 ° C.
A part of A is added to C: B, and an oil-in-water emulsion is obtained by a phase inversion temperature emulsification method (phase inversion temperature: 60 ° C.).
D: C is added with the rest of component 1, components 10 to 16, and component 17, and mixed, and then 50 non-woven fabrics (material: rayon, thickness: 1.5 mm, basis weight: 100 g / m ² , area: 300 cm ² ). ) Was filled and sealed in a bag-shaped container made of polyethylene terephthalate in an amount of 750 g to obtain a pack cosmetic.
The pack cosmetic of Example 18 was excellent in skin firmness / elasticity, no stickiness, and emulsion stability, and oil unevenness of the impregnated composition with time was not observed and was suppressed.

Claims (8)

The following components (A) to (D):
(A) Nicotinamide 1-10% by mass
(B) Polyoxyethylene addition type castor oil (C) Polyoxyethylene addition type sorbitol fatty acid ester (D) Containing a liquid oil agent,
Oil-in-water cosmetics in which the content mass ratio of the component (B) and the component (C) to the component (D): {(B) + (C)} / (D) is 1/10 to 1/4 . Composition for. The oil-in-water cosmetic composition according to claim 1, wherein the emulsified droplets have an average particle size of 500 nm or less. The underwater oil-type cosmetic according to claim 1 or 2, wherein the component (B) is one or more selected from polyoxyethylene-added castor oil having an average addition mole number of oxyethylene of 10 to 60. Material composition. The invention according to any one of claims 1 to 3, wherein the component (C) is one or more selected from the polyoxyethylene-added sorbitol fatty acid ester having an average addition mole number of oxyethylene of 10 to 60. Composition for oil-in-water cosmetics. The oil-in-water cosmetic composition according to any one of claims 1 to 4, further comprising the component (E) polysaccharide thickener. The oil-in-water cosmetic composition according to claim 5, wherein the component (E) is xanthan gum. The oil-in-water cosmetic product according to any one of claims 1 to 6, wherein the content mass ratio of the component (A) and the component (D): (A) / (D) is 0.15 to 0.5. Composition. A sheet-like cosmetic product obtained by impregnating a non-woven fabric with the oil-in-water cosmetic composition according to any one of claims 1 to 7.

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