CN116262094A

CN116262094A - Double-layer cosmetic

Info

Publication number: CN116262094A
Application number: CN202211539556.9A
Authority: CN
Inventors: 潘丁允; 中野新一郎
Original assignee: Shiseido Co Ltd
Current assignee: Shiseido Co Ltd
Priority date: 2021-12-15
Filing date: 2022-12-02
Publication date: 2023-06-16
Also published as: JP2023088751A

Abstract

Provided is a double-layer cosmetic which is excellent in feel in use, cleaning ability and separability. A bilayer cosmetic comprising (a) a specific amount of an alkyl glyceryl ether, (B) a specific amount of an amphoteric surfactant, (C) a specific amount of a metal metaphosphate, (D) an alcohol and/or benzoate other than (a), (E) water, and (F) oil.

Description

Double-layer cosmetic

Technical Field

The present invention relates to cosmetics. More specifically, the present invention relates to a cosmetic that separates into two layers upon standing and is easily emulsified by shaking.

Background

Conventionally, as a cosmetic, a double-layer type cosmetic has been known which is separated into two layers upon standing, and which is emulsified by shaking and then applied. Such cosmetics generally comprise an aqueous phase composed of an aqueous component and an oil phase composed of an oily component. When the double-layer cosmetic is applied to the skin or the like after being oscillated, the use feeling and efficacy obtained from the aqueous component and the oily component can be obtained simultaneously. For example, the water-soluble drug can provide a refreshing feeling in use, and the oil-soluble drug can provide a refreshing effect, and a cleaning effect. More specifically, the cleaning article is formed into a double-layered cleaning article, whereby the removal performance of the water-insoluble substance can be improved by the oily component and a fresh feel can be obtained by the aqueous component. Therefore, the cleaning product can be used with a high cleaning force, which can easily remove water-proof makeup, and with less tackiness after use.

However, in the double-layer cosmetic, separability is required that the cosmetic is cleanly separated into two layers upon standing. This is because: if the separation is insufficient, there is a case where there is a problem that the product is provided with a poor printing quality, and whether or not sufficient performance or efficacy can be obtained is observed due to visual precedent. However, according to the studies by the present inventors, it is known that: if additives having antiseptic properties such as polyol, sodium benzoate, and isopropyl alcohol are combined to improve the antiseptic properties of the two-layer cosmetic, there are cases where the additives cannot be separated cleanly. Therefore, a bilayer cosmetic that exhibits excellent separability even when such components are combined is desired.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open publication No. 2019-089750

Disclosure of Invention

From such a viewpoint, the present inventors have studied and found that: the specific material is effective for improving the separability of the double-layered cosmetic containing the preservative. That is, the present invention has been made based on the above-described findings, and an object of the present invention is to provide a cosmetic product which has excellent feel in use and cleaning ability, and which has both visually satisfactory separability and easy emulsification by rapid emulsification upon shaking.

According to the present invention, the following technical means are provided.

[1] A dual layer cosmetic comprising:

(A) 0.01 to 0.3 mass% of alkyl glyceryl ether based on the total mass of the bilayer cosmetic;

(B) 0.005 to 0.4 mass% of an amphoteric surfactant based on the total mass of the bilayer cosmetic;

(C) 0.005 to 0.5 mass% of a metal metaphosphate based on the total mass of the double-layer cosmetic;

(D) Alcohols and/or benzoates other than (a);

(E) Water; and

(F) And (3) oil.

[2] The cosmetic according to [1], wherein the proportion of the aqueous phase is 40 to 80% by mass based on the total mass of the double-layer cosmetic.

[3] The cosmetic according to [1] or [2], wherein the aforementioned alkyl glyceryl ether is selected from the group consisting of ethylhexyl glycerin, hexyl glycerin and cyclohexyl glycerin.

[4] The cosmetic according to any one of [1] to [3], wherein the alcohol is selected from the group consisting of dipropylene glycol, hexylene glycol, isopentylene glycol, butylene glycol, propylene glycol, diglycerol, glycerol, n-propanol, and isopropanol.

[5] The cosmetic according to any one of [1] to [4], wherein the metal benzoate is sodium benzoate, and the metal metaphosphate is sodium metaphosphate.

[6] The cosmetic according to any one of [1] to [5], wherein the oil is selected from the group consisting of hydrocarbon oils, alcohol esters and silicone oils.

[7] The cosmetic according to any one of [1] to [6], wherein the content of the alkyl glyceryl ether is 0.15 to 0.25% by mass based on the total mass of the double-layer cosmetic.

[8] The cosmetic according to any one of [1] to [7], wherein the content of the amphoteric surfactant is 0.03 to 0.3% by mass based on the total mass of the bilayer cosmetic.

[9] The cosmetic according to any one of [1] to [8], wherein the content of the metal metaphosphate is 0.05 to 0.4 mass% based on the total mass of the double-layer cosmetic.

[10] The cosmetic according to any one of [1] to [9], which is a cleaning product.

The cosmetic of the present invention has excellent feeling in use and cleaning ability, and also has visually satisfactory separability and easy emulsification by rapid emulsification upon shaking. In addition, the cosmetic of the present invention uses environmentally friendly materials, and does not require materials that generate unpleasant odors during use.

Detailed Description

[ double-layer cosmetic ]

The double-layer cosmetic of the present invention comprises:

(A) Alkyl glyceryl ether,

(B) An amphoteric surfactant,

(C) Metal metaphosphate salt,

(D) Alcohols and/or benzoates other than (A),

(E) Water, and

(F) And (3) oil.

These components constitute an aqueous phase and an oil phase depending on the water solubility or oil solubility of each component. The ratio of the aqueous phase to the oil phase is adjusted according to the purpose, and the ratio of the aqueous phase is preferably 40 to 80% by mass, more preferably 50 to 70% by mass, based on the total mass of the bilayer cosmetic, in order to sufficiently obtain the effects achieved by the water-soluble component and the oil-soluble component, respectively.

The components contained in the double-layer cosmetic of the present invention will be described below.

(A) Alkyl glyceryl ethers

The cosmetic of the present invention comprises alkyl glyceryl ether. The alkyl glyceryl ether is thought to be mainly present in the oil phase of a double-layer type cosmetic, which contributes to improvement of separability. The alkyl glyceryl ether has a structure in which an alkyl group forms an ether bond with a hydroxyl group of glycerin. Any of monoalkyl glyceryl ether, dialkyl glyceryl ether, and trialkyl glyceryl ether may be used, and the effect of improving the separability of monoalkyl glyceryl ether is excellent. The number of carbon atoms of the alkyl group is preferably 4 to 10, more preferably 6 to 8. The alkyl group may have any of a linear, branched, and cyclic structure. More specifically, the alkyl glyceryl ether is preferably selected from the group consisting of ethylhexyl glycerin, hexyl glycerin, and cyclohexyl glycerin.

The content of the alkyl glyceryl ether is preferably 0.01 to 0.3% by mass, more preferably 0.15 to 0.25% by mass, based on the total mass of the double-layer cosmetic.

(B) Amphoteric surfactants

The cosmetic of the present invention comprises an amphoteric surfactant. The amphoteric surfactant is considered to contribute to the separability of the aqueous layer from the oil layer in the double-layer cosmetic of the present invention. The amphoteric surfactant that can be used is not particularly limited, and for example, an imidazoline-based amphoteric surfactant or a betaine-based amphoteric surfactant is preferably used. Specific examples thereof include lauryl betaine, cocamidopropyl betaine, lauryl dimethylaminoacetic betaine, amidobetaine, sulfobetaine, sodium cocoamphoacetate, sodium 2-undecyl-N, N, N- (hydroxyethylcarboxymethyl) -2-imidazoline, and 2-cocoyl-2-imidazolium hydroxide-1-carboxyethoxy disodium salt. These amphoteric surfactants may be used in combination of two or more.

The content of the amphoteric surfactant is preferably 0.005 to 0.4 mass%, more preferably 0.03 to 0.3 mass%, based on the total mass of the bilayer cosmetic.

(C) Metal metaphosphate

The cosmetic of the present invention comprises a metal metaphosphate. The metal metaphosphate is considered to contribute to the separability of the bilayer cosmetic by combining with the amphoteric surfactant. Metaphosphoric acid has the general formula (HPO) ₃ ) _n (where n is a number indicating the degree of polymerization), mainly PO is used ₄ Polyphosphoric acid structure, or PO, formed by joining units ₃ The units constitute a cyclic phosphoric acid structure of a cyclic structure. The metaphosphoric metal salt of the present invention may have any structure, or may be a mixture thereof.

The metal ion constituting the metal salt is not particularly limited, but is preferably highly water-soluble, and more preferably an alkali metal salt or an alkaline earth metal salt. Typically sodium metaphosphate or potassium metaphosphate can be used, most preferably sodium metaphosphate.

The content of the metal metaphosphate is preferably 0.015 to 0.5 mass%, more preferably 0.05 to 0.4 mass%, based on the total mass of the double-layer cosmetic.

(D) Alcohols and/or benzoates

The cosmetic product according to the invention comprises an alcohol and/or a benzoate. The alkyl glyceryl ether as the component (A) has an alcoholic hydroxyl group, but is not included in the alcohol of the component (D) in the present invention.

The alcohol may be a monohydric alcohol or a polyhydric alcohol. The alcohol may be a lower alcohol or a higher alcohol.

In the present invention, the polyol means an alcohol having 2 or more hydroxyl groups bonded to a hydrocarbon chain. Here, the hydrocarbon chain optionally contains ether linkages. The polyol is considered to impart preservative ability in the cosmetic of the present invention, and is preferably blended into an aqueous phase.

Examples of such polyols include:

diols (e.g., ethylene glycol, propylene glycol, hexylene glycol, isopentylene glycol, propylene glycol, butylene glycol, trimethylene glycol, triethylene glycol, 1, 2-butanediol, 1, 3-butanediol, tetramethylene glycol, 2, 3-butanediol, pentamethylene glycol, 2-butene-1, 4-diol, octanediol, etc.);

triols (e.g., glycerol, trimethylolpropane, etc.);

tetraols (e.g., pentaerythritol such as 1,2, 6-hexanetriol, etc.);

pentaols (e.g., xylitol, etc.);

hexahydric alcohols (e.g., sorbitol and mannitol, etc.);

polyol polymers (e.g., diethylene glycol, dipropylene glycol, triethylene glycol, polypropylene glycol, tetraethylene glycol, diglycerol, polyethylene glycol, triglycerol, tetraglycerol, polyglycerol, and the like), and the like.

Among these, the polyhydric alcohol is preferably selected from the group consisting of dipropylene glycol, hexylene glycol, isoprene glycol, butylene glycol, propylene glycol, diglycerol, and glycerol.

The content of the polyhydric alcohol in the case of using the polyhydric alcohol is, for example, 11 to 19% by mass, preferably 11 to 16% by mass, based on the total mass of the two-layer cosmetic.

In the present invention, a monohydric alcohol means an alcohol having 1 hydroxyl group bonded to a hydrocarbon chain. The monohydric alcohol is considered to impart preservative ability to the cosmetic composition of the present invention, and is preferably incorporated into the oil phase. Specifically, examples of the monohydric alcohol include isopropyl alcohol, n-propyl alcohol, n-butyl alcohol, phenoxyalcohol, and ethanol, and isopropyl alcohol, n-propyl alcohol, and the like are preferably used.

The content of the monohydric alcohol in the case of using the monohydric alcohol is preferably 0.2 to 0.7 mass%, more preferably 0.25 to 0.55 mass%, based on the total mass of the bilayer cosmetic.

These alcohols may be arbitrarily selected according to the purpose, but in order to reduce the burden on the skin, it is preferable to use an alcohol other than phenoxyethanol or ethanol.

In the present invention, the metal benzoate is a salt obtained by substituting hydrogen of benzoic acid with an arbitrary metal, and it is considered that the metal benzoate imparts a corrosion preventing ability mainly to an aqueous phase in the cosmetic of the present invention. Therefore, the water solubility is preferably high, and alkali metal salts or alkaline earth metal salts are more preferable. Typically sodium or potassium benzoate is used, most preferably sodium benzoate.

The content of the metal benzoate in the double-layer cosmetic is preferably 0.1 to 0.5% by mass, more preferably 0.1 to 0.4% by mass, based on the total mass of the double-layer cosmetic.

(D) Water and its preparation method

The double-layer cosmetic of the present invention further comprises water as a component of the aqueous phase. As the water, water generally used in cosmetics may be used, and for example, purified water, ion-exchanged water, tap water, or the like may be used.

(E) Oil (oil)

The cosmetic of the present invention comprises oil. The oil is a main component constituting an oil phase of a double-layer cosmetic, and dissolves oil-soluble components imparting various effects to the cosmetic or imparts detergency to the cosmetic. The oil to be blended in the cosmetic of the present invention may be arbitrarily selected from oils commonly used in cosmetics, and is not particularly limited. Examples thereof include hydrocarbon oils, alcohol esters, silicone oils, higher fatty acids, higher alcohols, and the like. Among these, in the present invention, a substance selected from the group consisting of hydrocarbon oil, alcohol ester and silicone oil is preferably used as the oil.

Examples of hydrocarbon oils include mineral oils (liquid paraffin), hydrogenated polyisobutene, isododecane, isohexadecane, squalane, ceresin, and microcrystalline waxes. Of these, hydrocarbon oils selected from the group consisting of mineral oil (liquid paraffin), hydrogenated polyisobutene, isododecane, isohexadecane and squalane are preferable.

Examples of the alcohol ester include cetyl ethyl hexanoate (Cetyl Ethylhexanoate), ethylhexyl palmitate, isopropyl myristate, octyl dodecanoate, butyl stearate, decyl oleate, neopentyl glycol dicaprate, ethylene glycol dicaprylate, diisostearyl malate, trimethylolpropane tri (ethylhexanoate), trimethylolpropane triisostearate, pentaerythritol tetraoctanoate, glyceryl trioctanoate, glyceryl triisostearate, ethyl acetate, butyl acetate, amyl acetate, and the like. Among these, preferred are alcohol esters selected from the group consisting of cetyl alcohol ethyl hexanoate, ethylhexyl palmitate, isopropyl myristate and neopentyl glycol dicaprate.

Examples of the silicone oil include methylphenyl silicone having a siloxane structure in the main chain and substituted with methyl or phenyl, polydimethylsiloxane, and other modified polysiloxanes such as amino-modified polysiloxane, polyether-modified polysiloxane, alkyl-modified polysiloxane, fluorine-modified polysiloxane, and the like. Among these, methylphenyl silicone and methyl polysiloxane are preferable, and specifically, diphenyl polydimethylsiloxane, dodecyl pentasiloxane or decamethyl tetrasiloxane is preferably used.

Examples of the higher fatty acid include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, undecylenic acid, tall oil acid, isostearic acid, linoleic acid, linolenic acid, eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA).

Examples of the higher alcohols include straight-chain alcohols (e.g., lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, oleyl alcohol, cetostearyl alcohol, etc.), branched-chain alcohols (e.g., lanolin alcohol, cholesterol, phytosterol, hexyldodecyl alcohol, isostearyl alcohol, octyldodecyl alcohol, etc.), and the like.

These oils may be used in combination of two or more. The oil is preferably liquid at room temperature. The oil that is solid at room temperature may be any oil that becomes liquid when mixed with other oils.

The cosmetic of the present invention may contain components other than those generally used in cosmetics, within a range that does not impair the effects of the present invention. Examples of these components include thickeners, humectants, water-soluble agents (e.g., arbutin, ascorbyl glucoside, tranexamic acid, 4-methoxysalicylate, etc.), ultraviolet absorbers, chelating agents, pH adjusters, preservatives, pigments, dyes, surfactants, powder components, and the like.

The cosmetic of the present invention has clear separation of the water layer and the oil layer during standing, and has excellent appearance. The cosmetics separated into two layers are easily and uniformly emulsified by shaking by hand or the like in a state of being contained in a container and used. After emulsification, the aqueous layer and the oil layer are clearly separated again by standing for a short period of time, for example, 6 hours or less.

The double-layer cosmetic is not simply separated into two layers, but shows the property of having both the advantages of the aqueous phase and the oil phase when in use. Specifically, by adding an appropriate chemical agent or the like to the aqueous phase or the oil phase, it is possible to prepare a cleansing product in addition to a cosmetic water or the like. The double-layer cosmetic provided by the invention can be used as a cleaning product, and can exert the cleaning effect realized by the oil phase and simultaneously endow the water phase with a fresh and cool use feeling.

[ method for producing cosmetic ]

The cosmetic of the present invention can be produced by blending and mixing the components. The mixing order is not particularly limited, and usually, an aqueous phase and an oil phase are prepared separately and then sealed in a single container. That is, the cosmetic may be prepared by separately preparing an aqueous phase and an oil phase, and then blending the aqueous phase and the oil phase.

Examples

The present invention will be specifically described with reference to the following examples, but the present invention is not limited to these examples. Unless otherwise specified, the content is expressed as mass%.

Examples 1 to 14 and comparative examples 1 to 6

Cleaning products were prepared by blending the components in accordance with the formulations shown in Table 1, and the properties thereof were evaluated. Each evaluation item was evaluated by the following method.

Forming a double layer

The cosmetics were vigorously shaken and then allowed to stand, and the separated state was observed and evaluated according to the following criteria.

A: cleanly separate into two layers within 12 hours

B: after more than 12 hours, cleanly separate into two layers

C: not separated into two layers

Refreshing feeling

After the cosmetic was uniformly applied to the skin by shaking, the cosmetic was evaluated according to the following criteria based on the feel of use.

A: has very refreshing feel

B: has refreshing feeling

C: insufficient refreshing feeling [ Table 1-1]

[ tables 1-2]

Examples 15 to 32

Cleaning products were prepared by blending the components in accordance with the formulations shown in Table 2, and the properties were evaluated in the same manner as in example 1.

[ Table 2-1]

[ Table 2-2]

Claims

1. A dual layer cosmetic comprising:

(D) Alcohols and/or benzoates other than (a);

(E) Water; and

(F) And (3) oil.

2. The cosmetic according to claim 1, wherein the proportion of the aqueous phase is 40 to 80% by mass based on the total mass of the double-layer cosmetic.

3. Cosmetic according to claim 1 or 2, wherein the alkyl glyceryl ether is selected from the group consisting of ethylhexyl glycerin, hexyl glycerin and cyclohexyl glycerin.

4. A cosmetic according to any one of claims 1 to 3, wherein the alcohol is selected from the group consisting of dipropylene glycol, hexylene glycol, isoprene glycol, butylene glycol, propylene glycol, diglycerol, glycerol, n-propanol and isopropanol.

5. The cosmetic according to any one of claims 1 to 4, wherein the metal benzoate is sodium benzoate and the metal metaphosphate is sodium metaphosphate.

6. The cosmetic according to any one of claims 1 to 5, wherein the oil is selected from the group consisting of hydrocarbon oils, alcohol esters and silicone oils.

7. The cosmetic according to any one of claims 1 to 6, wherein the content of the alkyl glyceryl ether is 0.15 to 0.25% by mass based on the total mass of the double-layer cosmetic.

8. The cosmetic according to any one of claims 1 to 7, wherein the content of the amphoteric surfactant is 0.03 to 0.3% by mass based on the total mass of the bilayer cosmetic.

9. The cosmetic according to any one of claims 1 to 8, wherein the metal metaphosphate is contained in an amount of 0.05 to 0.4 mass% based on the total mass of the double-layer cosmetic.

10. The cosmetic according to any one of claims 1 to 9, which is a cleaning product.