JP2023061649A - Aqueous cosmetic - Google Patents

Abstract

To provide an aqueous cosmetic which comprises a vesicle containing a phospholipid, a thickening agent, a surfactant and an oily component, enables blending of the oily components and has excellent stability without aggregation or precipitation, a moisture-retaining feeling and a viscosity less likely to drip down.SOLUTION: There is provided an aqueous cosmetic which comprises the following components (A) to (D): (A) a phospholipid, (B) one or more selected from carboxymethyl dextran, a carboxy vinyl polymer and a salt thereof, (C) Polyglyceryl-10 Isostearate and (D) an oily component.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to an aqueous cosmetic containing a phospholipid, a thickener, a surfactant and an oily component.

A technique for solubilizing an oily component in a vesicle membrane is known (Patent Document 1). However, there is a problem that only a very small amount of a component with low polarity can be blended.
Liquid crystal compositions and emulsified compositions using phospholipids are known (Patent Document 2), and although it is possible to incorporate an oily component, there is the problem of not being able to obtain a fresh feeling of use like water-based cosmetics. there were.
Therefore, there is a demand for a solubilizer that can be used in combination with vesicles in aqueous cosmetics.

JP-A-8-154598 JP 2010-229040 A

It is known that when a phospholipid-containing vesicle composition (so-called liposome) is added to an aqueous cosmetic, the moisturizing persistence and permeability are improved. On the other hand, thickeners are often used in water-based cosmetics in order to improve usability and texture. Surfactants are often used as solubilizers for adding water-insoluble ingredients such as fragrances and oily functional ingredients. However, when a vesicle, a thickener, and a surfactant are mixed together, aggregation and precipitation of phospholipids are caused, which significantly impairs the stability of the formulation. Therefore, although the addition of vesicles to water-based cosmetics has a large merit of improving functionality, there is a problem that there are many restrictions on formulation design.
An object of the present invention is to contain a vesicle containing a phospholipid, a thickener, a surfactant, and an oily component, to enable the oily component to be blended, to have excellent stability without aggregation or precipitation, and to have a moisturizing feeling. , to provide an aqueous cosmetic having a viscosity that does not drip easily.

The main configuration of the present invention is as follows.
1. An aqueous cosmetic characterized by containing the following components (A) to (D).
(A) phospholipid (B) carboxymethyl dextran, carboxyvinyl polymer, and one or more selected from salts thereof (C) polyglyceryl-10 isostearate
(D) oily component2. 1. Contains carboxymethyldextran sodium as the component (B). Aqueous cosmetics according to.
3. 1. Viscosity measured with a Brookfield viscometer is 30 mPa·s or more. or 2. Aqueous cosmetics according to.

It was possible to provide an aqueous cosmetic that can contain an oily component, has an excellent moisturizing feeling, has a viscosity that prevents dripping, does not aggregate or precipitate, and has excellent stability.

A reference sample used in appearance evaluation in Examples.

The aqueous cosmetic composition of the present invention comprises (A) component: phospholipid, (B) component: one or more selected from carboxymethyl dextran, carboxyvinyl polymer, and salts thereof, and (C) component: polyglyceryl-10 isostearate. , (D) component: contains an oily component.

(A) Component The phospholipids (component A) used in the present invention include natural phospholipids such as egg yolk lecithin and soybean lecithin, hydrogenated egg yolk lecithin obtained by changing unsaturated carbon chains in lecithin to saturated bonds by hydrogenation, Phospholipids such as hydrogenated soybean lecithin, phosphatidylcholine purified or synthesized from natural lecithin, phosphatidylethanolamine, phosphatidylserine, phosphatidic acid, phosphatidylinositol, phosphatidylglycerol and the like. These phospholipids can be used alone or in combination.
A commercial item can be used as a phospholipid. Commercially available phospholipids include "Recinol S-10M" and "Recinol S-10E" manufactured by Nikko Chemicals Co., Ltd., "Basis LP-60HR" and "Basis LP-20" manufactured by Nisshin Oillio Co., Ltd., NOF Corporation. "COATSOME NC-61" manufactured by Kewpie Co., Ltd. "Egg yolk lecithin PL100P", "Egg yolk lecithin PL-30", H.I. Holstein GmbH & Co. Examples include "Phospholipon 85G" and "LIPOID P100" manufactured by KG.
Phospholipids are preferably blended as phospholipid-containing vesicles in order to increase moisturizing persistence and permeability. Phospholipid-containing vesicles can be prepared using a high-pressure emulsifier. A vesicle can be prepared by dispersing phospholipids and auxiliary agents such as polyhydric alcohols and sterols in purified water using a homomixer, followed by high-pressure treatment using a high-pressure emulsifier.
The blending amount of component (A) is preferably 0.01% by mass or more and 1% by mass or less, and particularly preferably 0.05% by mass or more and 0.5% by mass or less.

(B) Component The aqueous cosmetic composition of the present invention contains, as the (B) component, one or more selected from carboxymethyl dextran, carboxyvinyl polymer, and salts thereof. Component (B) is a thickener, and is a component necessary for imparting viscosity to the aqueous cosmetic composition of the present invention to prevent it from dripping. Carboxymethyl dextran Na is particularly preferred as component (B).
A commercially available product can be used as carboxymethyl dextran or a salt thereof, and examples thereof include "CMD" (sodium carboxymethyl dextran) manufactured by Meito Sangyo Co., Ltd. A commercial product can be used as the carboxyvinyl polymer (cosmetics display name carbomer), for example, "Carbopol 980" manufactured by Lubrizol, "Hibis Wako 105" and "Hibis Wako 103" manufactured by Fuji Film Wako Pure Chemical Industries, Ltd. mentioned.
The blending amount of component (B) is preferably 0.001% by mass or more and 1% by mass or less, and particularly preferably 0.01% by mass or more and 0.5% by mass or less.
% by mass of component (B) relative to component (A) ((B/A)×100) is preferably 1% by mass or more and 1000% by mass or less, more preferably 10% by mass or more and 300% by mass or less, and 20% by mass. More than 250% or less is particularly preferable.

(C) Component The aqueous cosmetic composition of the present invention contains polyglyceryl-10 isostearate as component (C). (C) Component is a surfactant. Commercial products of polyglyceryl-10 isostearate can be blended, and commercial products include “S Face 10G-IS” and “IS1001-P” manufactured by Sakamoto Pharmaceutical Co., Ltd., and “NIKKOL Decaglyn 1-” manufactured by Nikko Chemicals Co., Ltd. ISV" and the like. By blending the component (C), the oily component can be blended while maintaining the stability of the aqueous cosmetic composition of the present invention.
The blending amount of component (C) is preferably 0.01% by mass or more and 5% by mass or less, and particularly preferably 0.05% by mass or more and 1% by mass or less.
The mass % ((C/A)×100) of component (C) relative to component (A) is preferably 10% by mass or more and 300% by mass or less, and particularly preferably 20% by mass or more and 280% by mass or less.

(D) Component The aqueous cosmetic composition of the present invention contains an oily component as the (D) component. Examples of oily ingredients include fragrances and oily functional ingredients. Oily functional ingredients include oils (emollient effect), oil-soluble vitamins, flavonoids, sphingolipids, essential oils, ultraviolet absorbers, and the like.
The blending amount of component (D) is preferably 0.0005% by mass or more and 0.5% by mass or less, and particularly preferably 0.002% by mass or more and 0.1% by mass or less.
The mass % ((D/C)×100) of component (D) relative to component (C) is preferably 50 mass % or less, particularly preferably 40 mass % or less.

The aqueous cosmetic composition of the present invention has a viscosity that prevents dripping. The viscosity of the aqueous cosmetic composition of the present invention is preferably 30 mPa·s or more, more preferably 40 mPa·s or more, as measured by a Brookfield viscometer.

In the aqueous cosmetic composition of the present invention, as components other than (A) to (D), moisturizing ingredients such as polyhydric alcohols, sugars, and sugar alcohols, thickeners other than (B), and interfaces other than (C) Active agents, water-soluble functional ingredients, and the like can be blended within limits that do not impair the effects of the present invention.

Aqueous cosmetics of Examples 1 to 15 and Comparative Examples 1 to 23 were produced by stirring and mixing each component with the compositions shown in Tables 1 to 3. (A) Phospholipid used was prepared in advance into vesicles by high-pressure treatment with a high-pressure emulsifier. Vesicle formation was confirmed using a transmission electron microscope.
The display names of (A) are as follows, and the numbers in the display names mean % by mass.
Liposome 1: water 48.000, glycerin 40.000, BG 10.000, hydrogenated lecithin 1.714, phytosterols 0.286
Liposome 2: water 68.5945, DPG 20.0000, glycerin 10.0000, hydrogenated lecithin 1.0000, PEG-30 phytosterols 0.3000, phytosterols 0.0300, BG 0.0300, Na citrate 0.0250, poly( Methoxy PEG-9) 0.0200, citric acid 0.0005
Liposome 3: glycerin 40.000, water 37.878, DPG 20.000, lecithin 2.000, phytosterols 0.100, Na citrate 0.020, citric acid 0.002

Viscosity, transmittance, appearance, resistance to dripping, lack of sliminess, good moisturizing feeling, and storage stability were evaluated by the following methods.

<Viscosity>
Using a B-type viscometer, rotor No. 1 to 3 were used, and measurements were made at a rotation speed of 30 rpm for 30 seconds. For Comparative Example 23, the viscosity was too low to be measured.
<Transmittance>
Using a spectrophotometer, the transmittance was measured at an optical path length of 1 cm and a wavelength of 660 nm. Purified water was used as a blank. A sample in which air bubbles were removed 1 to 3 days after preparation was used to measure the initial value.

<Appearance>
The degree of turbidity in appearance was evaluated according to the following criteria. For the evaluation, reference samples of appearance were prepared and the closest one was selected. A photograph of the appearance of the reference sample is shown in FIG.
1: Clear 2: Slightly cloudy 3: Slightly cloudy 4: Very cloudy 5: Very cloudy

<Difficulty in dripping>
0.6 mL of the sample was taken in the palm of the hand, and the resistance to dripping when applied to the entire face was evaluated according to the following criteria.
Three expert panelists were asked to make a judgment as to whether the sample was "difficult to drip" or "easily dripped".
○: All 3 people judged that it was "hard to drip" △: 1-2 people judged that it was "hard to drip" ×: All 3 people judged that it was "easy to drip"

<Lack of sliminess>
0.6 mL of the sample was taken in the palm of the hand, and the absence of sliminess when the sample was applied to the entire face was evaluated according to the following criteria.
Three expert panelists were asked to judge either "no slimy" or "slimy".
○: All 3 people judged that there was "no sliminess" △: 1-2 people judged that there was "no sliminess" ×: All 3 people judged that there was "sliminess"

<Good moisturizing feeling>
0.6 mL of the sample was taken on the palm of the hand, and the moisturizing feeling after applying the sample to the entire face was evaluated according to the following criteria.
Three expert panelists were asked to judge either "good moisturizing feeling" or "bad moisturizing feeling".
○: All 3 people judged that "moisturizing feeling is good" △: 1 to 2 people judged that "moisturizing feeling is good" ×: All 3 people judged that "moisturizing feeling is bad"

<Storage stability>
It was stored at 5°C, room temperature, and 50°C for one month, and the transmittance was measured and the appearance was evaluated.
The change in turbidity after storage from the initial value and the uniformity after storage were evaluated according to the following criteria.
Change from the initial value of the turbidity of the appearance ○: Any change in the evaluation value compared to the initial state was less than 2 ×: Any change in the evaluation value compared to the initial state was 2 or more Appearance uniformity 〇: Overall uniform ×: Aggregation or precipitation occurred and became non-uniform

The aqueous cosmetics obtained in the examples of the present invention are excellent in stability, and no aggregation, precipitation, or separation is observed in spite of containing phospholipids, thickeners, surfactants, and oily components. rice field. In addition, it had a viscosity that prevented dripping, and was excellent in feeling during use.
On the other hand, many of the aqueous cosmetics obtained in Comparative Examples were inferior in stability, and changes in appearance were observed after storage. In addition, the highly stable aqueous cosmetics obtained in Comparative Examples tended to drip or had poor usability.

Claims (3)

An aqueous cosmetic characterized by containing the following components (A) to (D).
(A) phospholipid (B) carboxymethyl dextran, carboxyvinyl polymer, and one or more selected from salts thereof (C) polyglyceryl-10 isostearate
(D) oily component 2. The aqueous cosmetic composition according to claim 1, which contains sodium carboxymethyldextran as the component (B). 3. The aqueous cosmetic composition according to claim 1, which has a viscosity of 30 mPa·s or more as measured by a Brookfield viscometer.

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