CN107375015B

CN107375015B - Oily makeup-removing cosmetic

Info

Publication number: CN107375015B
Application number: CN201710089197.4A
Authority: CN
Inventors: 三译秀树
Original assignee: Fancl Corp
Current assignee: Fancl Corp
Priority date: 2016-05-17
Filing date: 2017-02-20
Publication date: 2021-07-09
Anticipated expiration: 2037-02-20
Also published as: JP2017206450A; CN107375015A; TWI729079B; JP6684648B2; TW201806581A

Abstract

The present invention addresses the problem of providing an oil-based makeup remover cosmetic composition that has high makeup removal capability and can be rinsed clean. Specifically disclosed is an oil-based makeup-removing cosmetic composition which is characterized by containing (A), (B) and (C), wherein (A): a polyglycerin diglyceride fatty acid ester comprising a fatty acid having 8 to 10 carbon atoms and a polyglycerin having an average polymerization degree of 4 to 10, (B): an esterified polyglycerin di-fatty acid ester comprising a fatty acid having 18 to 22 carbon atoms and a polyglycerin having an average polymerization degree of 8 to 15, wherein (C): oil agent, (a): (B) is 12: 5-1: 1.

Description

Oily makeup-removing cosmetic

Technical Field

The present invention relates to an oil-based makeup remover cosmetic.

Background

Since the burden on the skin is small during makeup removal, an oil makeup remover that removes makeup stains by utilizing the dissolving action of an oil component is being accepted by a large number of customers. The main components of the oil-based makeup removing cosmetic are oil agent and surfactant. Further, a tackifier may be added as needed. The action mechanism of the oily makeup removing cosmetic is as follows: the oily components dissolve the makeup soils and then, through the action of the surfactant, are able to be rinsed with water. However, when the balance between the selection and the amount of the two components is poor, the residual greasy feeling may be strongly felt after rinsing with water even if the makeup soils can be dissolved. Further, when a greasy feeling remains, the skin must be washed with a washing pigment again in order to remove the greasy feeling, and the skin may be excessively degreased to cause roughness and a harsh feeling to the skin.

In addition, the use of oil-based makeup-removing cosmetics in bathing is increasing. Therefore, it is desired to achieve a performance that does not deteriorate in cleansing power even with wet hands.

The present applicant has already completed the invention of an oil-based makeup remover cosmetic that does not decrease in makeup removing power even when used with hands wetted with water, and has patented it (patent document 1, non-patent document 1).

However, in response to recent makeup cosmetics, an oil-based makeup remover cosmetic having a stronger cleansing power and a less burden on the skin is demanded. In addition, it has been pointed out that in the case of hard water in general, the flushing of an oil-based makeup-removing cosmetic becomes difficult, and the residual oily feeling becomes strong, and an oil-based makeup-removing cosmetic having a high effect even in hard water areas is sought.

Documents of the prior art

Patent document

Patent document 1: japanese patent No. 4145238

Non-patent document

Non-patent document 1: "development of cleansing oil Using polyglycerin fatty acid ester" Japanese society of cosmetics technologists (Makeup skill ) volume 39, No. 3, page 186 to page 194 in 2005

Disclosure of Invention

The present invention addresses the problem of providing an oil-based makeup-removing cosmetic composition that, even in hard water areas, has a strong makeup-removing effect on makeup soils, does not leave a greasy residue, and is easy to rinse.

The present inventors have found that 2 polyglyceryl fatty acid esters are combined and blended with an oil agent, whereby the cleansing with water is possible without lowering the cleansing power even when the hands are wet with water. Further, it has been found that when a polyoxyethylene sorbitan fatty acid ester and/or a polyoxyethylene glycerin monoisostearate and a diglycerin monoisostearate are blended as a surfactant, the oil-based makeup remover does not lower the makeup removing ability even in a hard water region (in the case of using hard water) where the oil-based makeup remover has not been conventionally suitable for cleaning.

That is, the main configuration of the present invention is as follows.

(1) An oil-based makeup remover cosmetic composition characterized in that, in an oil-based makeup remover cosmetic composition containing (A), (B) and (C),

(A) the method comprises the following steps A polyglycerin diglyceride fatty acid ester comprising a fatty acid having 8 to 10 carbon atoms and a polyglycerin having an average polymerization degree of 4 to 10,

(B) the method comprises the following steps An esterified polyglycerin di-fatty acid ester comprising a fatty acid having 18 to 22 carbon atoms and a polyglycerin having an average polymerization degree of 8 to 15,

(C) the method comprises the following steps The oil agent is prepared from the raw materials of,

(A) the method comprises the following steps (B) Is 12: 5-1: 1.

(2) the oil-based makeup remover cosmetic according to (1), wherein the polyglycerin difatty acid ester comprising a fatty acid having 8 to 10 carbon atoms and a polyglycerin having an average polymerization degree of 4 to 10 is a hexapolyglycerin dicaprate and/or a hexapolyglycerin dicaprylate.

(3) The oil-based makeup removing cosmetic according to (1) or (2), wherein the esterified polyglycerin di-fatty acid ester comprising a fatty acid having 18 to 22 carbon atoms and a polyglycerin having an average polymerization degree of 8 to 15 is decaglyceryl diisostearate and/or decaglyceryl dioleate.

(4) The oil-based makeup-removing cosmetic according to any one of (1) to (3), wherein the oil agent is at least one selected from the group consisting of cetyl 2-ethylhexanoate, methylphenylpolysiloxane, meadowfoam oil and 2-hexyldecanol isostearate.

(5) The oil-based makeup-removing cosmetic according to any one of (1) to (4), further comprising (D): a polyoxyethylene sorbitan fatty acid ester and/or a polyoxyethylene glycerol monoisostearate (30EO), and (E): diglycerol monoisostearate.

(6) The oil-based makeup remover cosmetic according to (5), wherein the polyoxyethylene sorbitan fatty acid ester is polyoxyethylene sorbitan monostearate (20EO) and/or polyoxyethylene sorbitan monooleate (20 EO).

(7) The oil-based makeup remover cosmetic according to (5) or (6), wherein a maximum peak appears at 0.1 to 1 μm when the particle size distribution of emulsified particles produced by dilution with hard water having a hardness of 400mg/L or more is measured.

The oily makeup-removing cosmetic material of the present invention does not reduce makeup-removing ability even when used by hands wetted with water, and can be rinsed clean without leaving the oily makeup-removing cosmetic material on the skin. Further, the oily makeup remover cosmetic of the present invention does not deteriorate the makeup removing function even when water having high hardness is used. Therefore, even in a hard water environment such as a limestone zone, the cosmetic can be washed fresh and without leaving greasy feeling.

Drawings

FIG. 1 is a graph showing a particle size distribution of emulsified particle diameters when the oil-based makeup remover cosmetic of example 10 is diluted 60 times with water.

FIG. 2 is a graph showing a particle size distribution of an emulsified particle size when the oil-based makeup remover cosmetic of example 10 is diluted 60 times with hard water having a hardness of 489 mg/L.

FIG. 3 is a graph showing a particle size distribution of emulsified particle diameters when the oil-based makeup removing cosmetic of formulation example 1 was diluted 60 times with ion-exchanged water.

FIG. 4 is a graph showing a particle size distribution of emulsified particle sizes when the oil-based makeup remover cosmetic of formulation example 1 was diluted 60 times with hard water.

Fig. 5 is an image showing the contact angle between the skin and the water droplet after the cleansing with the oil-based makeup remover cosmetic of formula 1.

Fig. 6 is an image for observing the contact angle of the skin with a water droplet after washing with the oil makeup remover cosmetic of comparative example 21.

FIG. 7 is a graph showing a particle size distribution of emulsified particle diameters when the oil-based makeup removing cosmetic of comparative example 21 was diluted 60 times with ion-exchanged water.

Fig. 8 is an image for observing the contact angle of the skin with a water droplet after washing with a commercially available oil-based makeup remover cosmetic.

FIG. 9 is a graph showing a particle size distribution of an emulsified particle size of a 60-fold dilution of a commercially available oil-based makeup remover cosmetic in a reference test example diluted with hard water.

Detailed Description

The present invention relates to an oil-based makeup-removing cosmetic composition containing (a), (B), and (C), wherein (a): a polyglycerin diglyceride fatty acid ester comprising a fatty acid having 8 to 10 carbon atoms and a polyglycerin having an average polymerization degree of 4 to 10, (B): an esterified polyglycerin di-fatty acid ester comprising a fatty acid having 18 to 22 carbon atoms and a polyglycerin having an average polymerization degree of 8 to 15, wherein (C): oil agent, (a): (B) is 12: 5-1: 1.

the components of the present invention are explained below.

< (A): polyglyceryl diglyceride fatty acid ester comprising fatty acid having 8 to 10 carbon atoms and polyglycerin having an average polymerization degree of 4 to 10 >

The component (A) used in the present invention is a surfactant which is a polyglyceryl di-fatty acid ester obtained by esterifying a fatty acid having 8 to 10 carbon atoms with a polyglycerin having an average polymerization degree of 4 to 10. Specifically, there may be mentioned hexa-polyglycerol dicaprate and hexa-polyglycerol dicaprylate, which may be used alone or in combination. The polyglycerin diester fatty acid ester as the component (a) of the present invention is preferably blended in an amount of 9 to 12% by mass based on the oil-based makeup-removing cosmetic composition.

< (B): polyglyceryl diglyceride fatty acid ester comprising fatty acid having 18 to 22 carbon atoms and polyglycerin having an average polymerization degree of 8 to 15 >

The component (B) used in the present invention is a surfactant which is a polyglyceryl di-fatty acid ester obtained by esterifying a fatty acid having 18 to 22 carbon atoms with a polyglycerin having an average polymerization degree of 8 to 15. Specifically, decaglycerol diisostearate and decaglycerol dioleate may be used alone or in combination. The polyglycerin diester fatty acid ester as the component (B) of the present invention is preferably blended in an amount of 5 to 8% by mass based on the oil-based makeup-removing cosmetic composition.

In the present invention, the component (A) is incorporated more than the component (B). In the oil-based makeup remover cosmetic of the present invention, it is preferable that (a): (B) is 12: 5-1: 1. when the composition is within this range, the cleansing power is not reduced even when the composition is used for hands wetted with water, the hands can be rinsed cleanly with water, and no greasy feeling remains on the skin after rinsing.

< (C): oil preparation >

The oil (C) to be blended in the present invention includes the following.

Examples thereof include natural animal and vegetable oils and fats and semi-synthetic oils and fats, hydrocarbon oils, ester oils, glyceride oils, silicone oils, fat-soluble vitamins, higher fatty acids, and animal and vegetable or synthetic essential oil components. Examples of the natural animal and vegetable oils and fats and semisynthetic oils include avocado oil, linseed oil, almond oil, olive oil, wheat germ oil, sesame oil, rice germ oil, rice bran oil, safflower oil, soybean oil, evening primrose oil, corn oil, rapeseed oil, horse fat, palm oil, palm kernel oil, castor oil, sunflower oil, jojoba oil, macadamia nut oil, coconut oil, hydrogenated coconut oil, peanut oil, and lanolin. Examples of the hydrocarbon oil include squalane, squalene, liquid paraffin, and vaseline. Examples of the ester oil include diisobutyl adipate, 2-hexyldecyl adipate, di-2-heptylundecyl adipate, isostearyl isostearate, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, neopentyl glycol di-2-ethylhexanoate, trimethylolpropane tri-2-ethylhexanoate, pentaerythrityl tetra-2-ethylhexanoate, cetyl octanoate, oleyl oleate, octyldodecyl oleate, decyl oleate, neopentyl glycol didecanoate, 2-ethylhexyl succinate, isocetyl stearate, butyl stearate, diisopropyl sebacate, cetyl lactate, tetradecyl lactate, isopropyl myristate, octyl palmitate, 2-ethylhexyl palmitate, 2-hexyldecyl palmitate, 2-heptylundecyl palmitate, and the like, 12-hydroxystearic acid cholesterol ester, phytosterol oleate, malic acid diisostearate, p-methoxy cinnamate, pentaerythritol rosin ester, and the like. Examples of the glycerin ester include triisostearin, triisopalmitin, tri-2-ethylhexanoic acid glycerin ester, triacontanoic acid glycerin ester, and di-p-methoxycinnamic acid monoisooctanoic acid glycerin ester. Examples of the silicone oil include higher alkoxy-modified polysiloxanes such as dimethylpolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, octamethylcyclopentasiloxane, decamethylcyclohexasiloxane, diphenylsiloxyphenyltrimethicone, and stearyloxypolysiloxane, alkyl-modified polysiloxanes, and higher fatty acid ester-modified polysiloxanes.

Among these exemplified compounds, a combination of cetyl 2-ethylhexanoate, methylphenylpolysiloxane, 2-hexyldecanol isostearate, octyl (octyl) caprylate) and the like is preferable because the makeup removing effect is improved.

Further, it is preferable to add a small amount of the meadowfoam seed oil because the effect of softening the skin is exhibited.

The amount of the oil agent is preferably 10 to 90% by mass based on the total amount of the oil-based makeup remover cosmetic composition from the viewpoint of makeup removability and water solubility.

When the component (D) is further blended with at least one hydrophilic surfactant selected from among polyoxyethylene sorbitan fatty acid esters, polyoxyethylene glycerol monoisostearate (30EO), and diglycerol monoisostearate as the component (E) in the components (a), (B), and (C), it is preferable because the makeup remover function (function of maintaining makeup removing power even when used with hands wet with water, and function of washing with water) can be used without being reduced even in hard water.

< (D): polyoxyethylene sorbitan fatty acid ester polyoxyethylene glycerol monoisostearate (30EO) >

Component (D) is a hydrophilic surfactant which is a polyoxyethylene sorbitan fatty acid ester and/or polyoxyethylene glycerol monoisostearate (30 EO). The polyoxyethylene sorbitan fatty acid ester is obtained by addition polymerization of ethylene oxide to an ester of sorbitol and a fatty acid having 12 to 18 carbon atoms. Specific examples thereof include polyoxyethylene sorbitan monostearate (20EO) and polyoxyethylene sorbitan monooleate (20 EO).

(D) The component is preferably contained in an amount of 0.1 to 3% by mass, more preferably 1.2 to 3% by mass, based on the oil-based makeup-removing cosmetic composition.

< (E): diglycerol monoisostearate >

Diglycerol monoisostearate is an ester of isostearic acid and diglycerol, and is generally used as a lipophilic solvent. In the present invention, the amount of water that can be solubilized in the oil-based makeup remover cosmetic can be increased by blending diglycerol monoisostearate. The diglycerol monoisostearate is preferably blended in an amount of 0.1 to 3% by mass, more preferably 0.2 to 1% by mass, based on the oil-based makeup-removing cosmetic composition.

In the present invention, as the hydrophilic surfactant, (D): polyoxyethylene sorbitan fatty acid ester and/or polyoxyethylene glycerol monoisostearate (30EO) with (E) as lipophilic solvent: diglycerol monoisostearate as (D): (E) is 1.7: 1-3: when the ratio of 0.4 is blended, the oil makeup stain can be washed smoothly without lowering the makeup removing function (the function of maintaining the makeup removing power even when the hand is wetted with water and the function of washing with water) even with hard water.

< optional Components >

In the oil-based makeup-removing cosmetic composition of the present invention, various materials commonly used in cosmetic compositions may be blended as optional components within a range not impairing the effects of the present invention. For example, polyols, tackifiers, antioxidants, perfumes, and the like can be blended.

Since the polyol may act as a solvent, the makeup removing ability may be improved when it is blended. Particularly, it is preferable to blend 1, 2-pentanediol or dipropylene glycol because the cleansing power is improved.

Examples of the thickener include stearyl inulin and glyceryl (behenate/behenate). The first purpose of containing a tackifier is to tackify to a desired viscosity. A second aim is to improve the evenness of application, so that it is smoother on the skin and easier to remove makeup. The specific stickiness also improves the tack of the surfactant and oil. A third object is to form a thin coating film when applied to the skin, prevent excessive friction against the skin, exhibit an effect of suppressing irritation, and improve safety. The thickener is preferably incorporated in the composition in an amount of 0.01 to 3% by mass. When the content is less than 0.01% by mass, the effect of improving coating uniformity and the effect of alleviating irritation may not be easily obtained. If the amount is more than 3% by mass, precipitation may occur.

As the antioxidant, tocopherol can be cited.

The oil-based makeup remover cosmetic of the present invention is designed into various dosage forms in consideration of usability and feeling of use. As a preferred embodiment, a liquid or gel form can be used.

Examples

The characteristics and effects of the present invention will be described in further detail below by way of examples, comparative examples, and test examples.

1. The components (A) are mixed: hexa-polyglycerol didecanoate, component (B): decaglycerol diisostearate or decaglycerol dioleate, component (C): preparation, cleaning and washing effect test of cetyl 2-ethylhexanoate in examples 1 to 4 and comparative examples 1 to 17

The oily makeup remover cosmetics of examples 1 to 4 were prepared with the compositions shown in table 1, and the oily makeup remover cosmetics of comparative examples 1 to 17 were prepared with the compositions shown in table 2. In examples 1 to 4, the ratio of the component (A) to the component (B) was 12: 5-1: 1, and mixing the components according to the mixing ratio of the components. Comparative examples 1 and 2 are compositions in which the compounding ratio of the component (a) to the component (B) is 5: 11.5 the composition was compounded. Comparative examples 3 to 17 had compositions in which the component (A) was not blended.

TABLE 1

TABLE 2

< preparation method >

Each component was mixed under heating and stirring according to a conventional method to prepare a liquid oily makeup remover cosmetic.

< evaluation method >

The following test methods were used to evaluate the makeup removing ability of hands wetted with water and the non-residue greasy feeling after washing with water.

[ evaluation of cleansing function ]

In order to evaluate "cleansing power when using hands wetted with water" and "no residual greasy feeling after rinsing with water", the following simple test method has been widely used and is often used. The present invention evaluated the aforementioned 2 makeup removal functions according to this test method. Sensory evaluation tests were also conducted.

(1) Simple test method

< measurement of Water solubilizing ability (test for evaluating "cleansing power when hand wetted with Water) >

The appearance of the oil-based makeup remover when water was added to the makeup remover was observed, and the amount of water that was solubilized in a transparent state was measured.

While stirring each oily makeup remover cosmetic, water was added dropwise, and the amount of water was measured when cloudiness occurred.

The term "capable of maintaining transparency even when water is added" means that the emulsion composition does not become an O/W emulsion composition (either a reversed micelle phase, a lamellar liquid crystal phase or a bicontinuous microemulsion) even when water is mixed therein.

Since the oily component of the oily makeup remover cosmetic dissolves oily makeup soils, it is important that the oil phase be continuous. In the present evaluation method, the amount of water that can be solubilized in a transparent state was measured as the amount that can be mixed with respect to 100 mass% of the oil-based makeup remover cosmetic.

Further, if the transparency can be maintained even when 20 mass% of water is added, the oil phase is continuous, and it is judged that the makeup removing power set at the beginning can be substantially maintained. When the amount of water added is 15% by mass or less, the cleansing power is judged to be insufficient.

< measurement of emulsion particle size when O/W type emulsion composition is prepared by adding Water (test for evaluating "No residual greasy feeling after washing with Water) >

The mechanism of action of the oily makeup remover cosmetic is that an oily component dissolves makeup soils and then is capable of being rinsed with water by the action of a surfactant, however when the balance thereof is poor, there are the following cases: the residual greasy feeling is not caused by the non-removal of the clean makeup dirt but is caused by the residual greasy feeling of the oily makeup-removing cosmetic material itself remaining on the skin. This test is a test for predicting the residual greasy feeling caused by the skin residue of the oily makeup-removing cosmetic. Further, if the test results are good, it is predicted that the oil-based makeup remover cosmetic composition can be used without leaving greasy feeling even when used as a general makeup remover.

An O/W type emulsified composition was prepared by adding water in an amount of 60 times the amount of the oily makeup remover cosmetic, and the particle size distribution of the emulsified particles in the composition was measured by a laser diffraction method using a laser particle sizer 2000 (manufactured by Malvern Instruments Ltd.). The volume-based mean diameter was measured and the peak shape of the particle size distribution was observed.

When the emulsified particle size is large, oily feeling (greasy feeling) remains on the skin. However, if the emulsified particle size formed by adding water has a very large peak at 1 μm or less, a clean feeling without leaving greasy feeling after cleaning is obtained.

(2) Sensory evaluation test

< cleansing power when applied to hands moistened with water >

The oil-based makeup remover was actually applied to the skin to which the oil-based makeup remover (lipstick) was applied by 1 skilled technician with hands wetted with water, and the makeup removing ability was evaluated according to the following criteria.

O: is very good

And (delta): good effect

X: failure of the product

< residual greasy feeling after waterless cleaning >

This test was conducted for the purpose of evaluating the residual oily feel of the oil-based makeup-removing cosmetic material itself after washing with water. Therefore, unlike the previous test, lipstick was not applied to the skin in advance.

The oily makeup remover was applied to the skin by 1 skilled worker with hands moistened with water, and the residual oily feeling (residual feeling) of the makeup remover on the skin after washing was evaluated according to the following criteria.

O: no residual greasy feeling

And (delta): has residual greasy feeling

(3) Results

The compositions of examples 1 to 4 all had good makeup removal effects. Furthermore, no greasy feeling remained after washing. The upper limit of the amount of water mixed in the cosmetic material which can be maintained in a transparent state was 20 mass% in examples 1, 3 and 4 and 30 mass% in example 2, and an extremely high capacity was added. In addition, the emulsified particles have a very small size of 0.2 to 0.8 μm when diluted 60 times with water. The results of these two sets of tests demonstrate good make-up removal and no residual greasy feel when used with wet hands.

On the other hand, in all the compositions of comparative examples 1 to 17, the makeup removing ability was evaluated as poor when the hand wetted with water was used. In addition, only comparative example 2 was "evaluation o" showing no residual greasy feeling after rinsing with water, and the compositions of the other comparative examples were "evaluation x" showing residual greasy feeling. It was confirmed that this is because the O/W type emulsified composition was formed to be clouded even if a small amount of water was added, and most of the composition was separated without emulsification when diluted 60 times with water, even though the emulsified particles were as large as 7.566 μm as shown in the result of comparative example 1.

Comparative example 1 contains essential components (a) (B) (C) of the present invention, but the results were "evaluation x" showing poor cleansing power when used with hands wetted with water, and "evaluation x" showing residual greasy feeling after rinsing with water. This is considered to be a case where the mixing ratio of the component (a) to the component (B) is 5: 11.5 the ratio of the component (B) is larger than that of the component (A). Comparative example 2 is "evaluation ∘" showing no residual greasy feeling after rinsing with water, but "evaluation x" showing poor makeup removing power when used with hands wetted with water, which is also considered that the mixing ratio of the (a) component to the (B) component was 5: 11.5 the ratio of the component (B) is larger than that of the component (A).

In addition, comparative examples 10, 11, 15, 16, 17 were separated immediately after preparation and did not become homogeneous oily makeup-removing cosmetics.

From the above test results, it is considered that in order to satisfy the requirements of an oil-based makeup remover cosmetic such as "makeup removing ability when used with hands wet with water" and "no greasy feeling left after washing with water", it is necessary to contain (a): a polyglycerin diglyceride fatty acid ester comprising a fatty acid having 8 to 10 carbon atoms and a polyglycerin having an average polymerization degree of 4 to 10, (B): an esterified polyglycerin di-fatty acid ester comprising a fatty acid having 18 to 22 carbon atoms and a polyglycerin having an average polymerization degree of 8 to 15, wherein (C): an oil agent, and (a): (B) the ratio of (A) to (B) is 12: 5-1: 1.

component (A): hexa-polyglycerol didecanoate, component (B): re-study of the ratio of Decaglycerol diisostearate

In the above 1, it is clear that the ratio of the component (A) to the component (B) is important. To confirm this again, oil-based makeup remover cosmetics having the compositions of examples 5 to 8 and comparative examples 18 to 21 shown in the following table 3 were prepared and evaluation tests were carried out under the same conditions as in 1.

(1) Test compositions

TABLE 3

In examples 5 to 8, the blending ratios of the component (A) and the component (B) were as follows: example 5 is 12: 5, example 6 is 11: 6, example 7 is 10: 7, example 8 is 9: 8. similarly comparative example 18 is 13: 4, comparative example 19 is 8: comparative example 20 was 6: 11, comparative example 21 is 4: 13.

(2) results

The evaluation results are shown in the lower part of table 3.

The compositions of examples 5 to 8 all showed good makeup removability and no residual greasy feeling after washing with water. The upper limit of the amount of water mixed in the cosmetic material which can be maintained in a transparent state is 30 mass% in examples 5 and 8, 40 mass% in example 6, and 35 mass% in example 7, and an extremely high capacity can be added. In addition, the emulsified particles of examples 5 to 8 were extremely small in size, 0.3 to 0.7 μm, when diluted 60 times with water. The results of these two sets of tests confirmed good make-up removal when used with wet hands and sensory evaluation results without residual greasy feel after rinsing with water.

On the other hand, the compositions of comparative examples 19 to 21 were poor in both the evaluation of the cleansing power and the evaluation of the residual greasy feeling after rinsing with water. In addition, as for the upper limit of the mixing amount of water capable of maintaining the cosmetic in a transparent state, comparative example 18 was 15 mass%, comparative examples 19 and 20 were 5 mass%, and comparative example 21 was 0 mass%, and the solubilizing amount of water was small. Further, the particle size of the emulsified particle was 0.3 μm in comparative example 18 alone, but it was more than 1 μm in all cases, and the particle size of comparative example 21 was as large as 22 μm or more. The results of these two tests directly confirm the results of "evaluation x" of poor sensory evaluation tests (makeup removability, residual greasy feeling) of comparative examples 19 to 21. The upper limit of the mixing amount of water capable of maintaining the cosmetic in a transparent state of comparative example 18 was 15% by mass, and the cleansing power was good "evaluation Δ". From the results, it was judged that comparative example 18 had a possibility that the makeup removing ability decreased when the mixing amount of water was large in actual use.

From the results of the test in 1 and the test in 2, it is understood that the blending ratio of the component (a) and the component (B) of the oil-based makeup remover cosmetic of the present invention is important, and the ratio of the component (a) to the component (B) is 12: 5-1: 1 is of importance.

3. Preparation and test of oily makeup remover cosmetic with non-decreasing detergency in hard water environment (1)

It is known that when an oil-based makeup-removing cosmetic is generally used in a hard water environment, the cleansing effect is reduced and the rinsing becomes insufficient. This is considered to be due to the aggregation of the emulsified particles by the hard water. As a result, the residual greasy feeling was produced even after washing with water. For example, in china, there are also regions where the hardness of tap water is as high as 400 or more, and the above-described reduction in cleaning power and residual greasy feeling after washing occur. As a composition of an oil-based makeup remover cosmetic that can be used in such extreme hard water areas, a composition in which a polyoxyethylene sorbitan fatty acid ester and/or polyoxyethylene glyceryl monoisostearate (30EO) as a component (D) and a diglyceryl monoisostearate as a component (E) are further added in addition to the components (a), (B) and (C) in the present invention has been studied.

(1) Compositions of examples 9 to 11

The following compositions of table 4 were prepared and tests were performed assuming use in a hard water environment.

TABLE 4

(2) Test method

In addition to the test conducted in the above 1, a dilution test with hard water having a hardness of 489mg/L was conducted in the same manner.

In addition, in order to confirm the presence or absence of coarse particles caused by hard water, the particle size distribution was confirmed in addition to the average particle size when diluted with hard water, and the appearance of a maximum peak exceeding 1 μm in the particle size distribution was observed.

(3) Results

The compositions of examples 9-11 all had very good make-up removal and no residual greasy feel after rinsing with hard water. The upper limit of the amount of water mixed in the cosmetic material which can be maintained in a transparent state was 25% by mass in each of examples 9 to 11, and a high volume of water was mixed in. Furthermore, the emulsified particles have a size of 0.2 to 0.3 μm when diluted 60 times with water, and are extremely small, even if they are hard water, 0.3 to 0.6. mu.m. The results of these two sets of tests confirmed good make-up removal when used with hands wet with water and no residual greasy feel after rinsing with hard water. Further, no significant peak exceeding 1 μm which causes discomfort such as residual greasiness to be felt during use was observed. The maximum peaks of examples 9 to 11 were all 1 μm or less.

FIG. 1 shows a particle size distribution diagram when the oil-based makeup-removing cosmetic of example 10 is diluted 60 times with water, and FIG. 2 shows a particle size distribution diagram when the oil-based makeup-removing cosmetic of example 10 is diluted 60 times with hard water having a hardness of 489 mg/L. Comparing the distribution patterns of the two, it is found that the oil-based makeup remover cosmetic of example 10 has a maximum peak of the particle distribution of the emulsion in any of water and hard water at 0.1 to 1 μm.

That is, the oil-based makeup-removing cosmetics of examples 9 to 11 did not cause aggregation of emulsified particles due to hard water, and did not give a residual greasy feeling, and thus were used in hard water zones without any problem.

4. Preparation and test of oily makeup remover cosmetic with non-decreasing detergency in hard water environment (2)

(1) Compositions of examples 12 to 16

The following compositions of table 5 were prepared and tests were performed assuming use in a hard water environment.

TABLE 5

(2) Test method

A test using hard water having a hardness of 489mg/L was carried out in the same manner as the test (1).

In addition, in order to confirm the presence or absence of coarse particles due to the mixing of hard water, the particle size distribution was confirmed in addition to the average particle size measured when diluted with hard water, and the appearance of a maximum peak exceeding 1 μm in the particle size distribution chart was observed.

(3) Results

The compositions of examples 12-16 all had good make-up removal and no residual greasy feel after rinsing with hard water. The upper limit of the amount of water mixed in which the cosmetic can be maintained in a transparent state was 30% by mass in example 12, 20% by mass in both examples 13 and 14, 35% by mass in example 15, and 20% by mass in example 16, and high volume water was able to be mixed in. In addition, the size of the emulsified particles is as small as 0.2 to 0.8 μm when diluted 60 times with water, and there is almost no difference between water and hard water. Further, no significant peak exceeding 1 μm was observed, which resulted in a feeling of discomfort such as residual greasiness after rinsing with water.

The following shows a formulation example of an oil-based makeup remover cosmetic containing an optional component.

< prescription example >

Prescription example 1 (cleansing oil)

Prescription example 2 (cleansing oil)

Prescription example 3 (cleansing gel)

The oily makeup remover cosmetics of formula examples 1 to 3 all had high makeup removing ability, were quickly rinsed with water, and had no residual greasy feeling. In addition, even if the cleansing is carried out with hard water, the performance (cleansing power, residual greasy feeling after rinsing with water) is not changed.

< dilution test of oil-based make-up remover cosmetic preparation of formulation example 1 >

The oily makeup remover cosmetic of formulation example 1 was diluted 60 times with ion-exchanged water and hard water having a hardness of 489mg/L to prepare an O/W type emulsified composition, and the particle size distribution of the composition was measured by a laser diffraction method using a laser particle sizer 2000 (manufactured by Malvern Instruments Ltd.). The volume-based mean diameter was measured and the peak shape of the particle size distribution was observed.

The volume-based mean diameter was 5.114 μm when diluted with ion-exchanged water and 4.740 μm when diluted with hard water, and the difference between them was not observed. The particle size distribution of emulsified particles when diluted with ion-exchanged water is shown in fig. 3, and the particle size distribution when diluted with hard water is shown in fig. 4.

In the particle size distribution diagram of fig. 3, 2 maximum peaks appear. The peak appearing first is a peak derived from an emulsion (oil droplet particles) and appears at a position of 0.1 to 1 μm. Then, the peak appearing 1 to 10 μm after the maximum value is a peak derived from the oil-soluble thickener blended as an arbitrary component (a peak derived from (behenic acid/eicosanedioic acid) glyceride and stearoyl inulin). The appearance positions of the 2 peaks were not changed both when diluted with ion-exchanged water and when diluted with hard water. Therefore, it was confirmed from this test that the performance of the oil-based makeup-removing cosmetic composition did not change and no greasy feeling remained even if any component was added as in formulation examples 1 to 3 of the present invention.

< observation of contact angle between skin and Water droplet after cleaning with the oil-based cleansing cosmetic of formulation example 1 >

The upper left arm was washed with the oily makeup remover cosmetic of formulation example 1 in a range of 5cm × 5cm and sufficiently rinsed with hard water. Thereafter, 1 drop of ion-exchanged water was dropped onto the site of washing, and the state of the water drop formed when the water drop was in contact with the skin was photographed, and the magnitude of the contact angle was observed. As a comparative control, the same observation was made using the oil-based makeup remover cosmetic of comparative example 21.

Fig. 5 shows an image of a contact angle formed by skin and a water droplet when the skin was washed using prescription example 1, and fig. 6 shows an image of a contact angle formed by skin and a water droplet when the skin was washed using comparative example 21. As is clear from comparison of the images in fig. 5 and 6, the skin washed in the prescription example 1 was in a so-called "hydrophobic" state, whereas the comparative example 21 was in a "water-fused skin" state. This means that in the case of formulation example 1, the oily makeup remover cosmetic did not remain on the skin. On the other hand, it is considered that the oily makeup remover cosmetic of comparative example 21 remains on the skin and is hydrated on the skin due to its surface active action.

The oil-based makeup-removing cosmetic of comparative example 21 was diluted 60 times with ion-exchanged water, and the particle size distribution chart of the measured particle size was shown in fig. 7, but the maximum value of the emulsified particles appeared in the range of 10 to 100 μm, and it was considered that the oil-based makeup-removing cosmetic remained on the skin. On the other hand, since the formulation example 1 did not show such a maximum distribution value of the emulsified particles, it is considered that the oil-based makeup remover cosmetic was quickly washed off from the skin.

< reference test example >

The upper left arm was washed in a range of 5cm × 5cm using a commercially available oily makeup remover cosmetic evaluated by a sensory test as having residual greasy feeling remaining, and then sufficiently rinsed with hard water. 1 drop of ion-exchanged water was dropped onto the site of washing, and the state of the water drop formed when the water drop was in contact with the skin was photographed, and the magnitude of the contact angle was observed.

The oily makeup remover cosmetic was then diluted 60 times with hard water to prepare an O/W type emulsified composition, and the particle size distribution of the composition was measured according to a laser diffraction method using a laser particle sizer 2000 (manufactured by Malvern Instruments Ltd.). The volume-based mean diameter was measured and the peak shape of the particle size distribution was observed.

The captured image of the contact angle is shown in fig. 8. The particle size distribution diagram is shown in fig. 9.

The average particle diameter of the commercially available oil-based makeup remover cosmetic when emulsified in water is as large as 17.277 [ mu ] m, and a maximum peak appears at 1 to 10 [ mu ] m in the distribution diagram of emulsified particles.

From the measured values of the contact angle and the particle size distribution, the commercially available oil-based makeup remover cosmetic had unsatisfactory characteristics such that it was difficult to rinse with water.

Claims

1. An oily makeup remover cosmetic characterized in that, in an oily makeup remover cosmetic containing A, B, C,

a: a polyglycerin diglyceride fatty acid ester comprising a fatty acid having 8 to 10 carbon atoms and a polyglycerin having an average polymerization degree of 4 to 10,

b: an esterified polyglycerin di-fatty acid ester comprising a fatty acid having 18 to 22 carbon atoms and a polyglycerin having an average polymerization degree of 8 to 15,

c: the oil agent is prepared from the raw materials of,

a: b is 12: 5-1: 1.

2. the oil-based makeup remover cosmetic according to claim 1, wherein the polyglycerin difatty acid ester comprising a fatty acid having 8 to 10 carbon atoms and a polyglycerin having an average polymerization degree of 4 to 10 is a hexapolyglycerin dicaprate and/or a hexapolyglycerin dicaprylate.

3. The oil-based makeup removing cosmetic according to claim 1 or 2, wherein the esterified polyglycerin di-fatty acid ester comprising a fatty acid having 18 to 22 carbon atoms and a polyglycerin having an average polymerization degree of 8 to 15 is decaglyceryl diisostearate and/or decaglyceryl dioleate.

4. The oil-based makeup-removing cosmetic according to claim 1 or 2, wherein the oil agent is one or more selected from the group consisting of cetyl 2-ethylhexanoate, methylphenylpolysiloxane, meadowfoam oil, and 2-hexyldecanol isostearate.

5. The oil-based makeup-removing cosmetic according to claim 1, characterized by further comprising D: polyoxyethylene sorbitan fatty acid ester and/or polyoxyethylene glycerol monoisostearate (30EO), and E: diglycerol monoisostearate.

6. The oily makeup remover cosmetic according to claim 5, characterized in that the polyoxyethylene sorbitan fatty acid ester is polyoxyethylene sorbitan monostearate (20EO) and/or polyoxyethylene sorbitan monooleate (20 EO).

7. The oil-based makeup-removing cosmetic according to claim 5 or 6, characterized in that when the particle size distribution of emulsified particles produced by dilution with hard water having a hardness of 400mg/L or more is measured, a maximum peak appears at 0.1 to 1 μm.