JP6954009B2 - Oily cosmetics - Google Patents

Description

The present invention relates to a transparent hydrous oily cosmetic in which a large amount of aqueous component is solubilized in an oily component with a small amount of surfactant.

Oil-based cosmetics are cosmetics containing a high concentration of oil, such as oil-based cleansing agents, which are makeup removers with a high cleaning effect, bath oil-type bath cosmetics with a high emollient effect and moisturizing properties, and beauty oils. , Has been marketed as a large number of products. Among them, water-containing oil-based cosmetics can supply moisture to dry human skin, give a refreshing feeling when a cleansing agent is applied or washed away, and dissolve water-soluble active ingredients in beauty oil. Various technologies have been proposed because of various advantages such as the ability to do so.

As the water-containing oil-based cosmetics, for example, two or more types of polyoxyethylene fatty acids glyceryl having different HLBs, oils liquid at room temperature, and water-containing oil-containing cosmetics are described in Patent Document 1. However, in the method described in Patent Document 1, it is necessary to mix the surfactant with water at the same magnification or more, and since a large amount of the surfactant is used, there is a problem that the feel is sticky.

Further, Patent Document 2 proposes a hydrous oily cosmetic containing polyoxyethylene fatty acid glyceryl, polyglycerin oleic acid ester, polyhydric alcohol, liquid oil at room temperature, and water, and includes water. It is stated that this can improve the usability during application and rinsing. However, in Patent Document 2, there is a problem that the water content that can be solubilized is 15% or less, and if the water content exceeds 15%, the stability is impaired.

To solve this problem, Patent Document 3 proposes a hydrous oil-based cosmetic containing a nonionic surfactant containing a polyoxyethylene fatty acid glyceryl, a liquid oil, and water. By the method of this document, the amount of the surfactant can be reduced, and the irritation expression and stickiness of the cosmetics have been successfully reduced.

On the other hand, in recent years, from the viewpoint of luxury, not only the usability but also the transparency of the appearance is strongly required. However, the oil-based cosmetics of Patent Document 3 have a problem that the appearance becomes milky and a high-class feeling cannot be sufficiently imparted when the technology is applied to basic cosmetics such as beauty essences.

JP-A-2005-002059 JP 2016-08883 JP-A-2005-187355

A water-containing oil-based cosmetic in which an aqueous component is solubilized in an oil-based component can improve the usability during cleansing and can achieve dissolution of the water-soluble active ingredient in oil. However, the prior art has problems such as a decrease in usability such as stickiness due to an increase in the amount of the surfactant blended, an emulsion in appearance, and a limited water content.

As described above, in the conventionally known methods, a cosmetic that simultaneously satisfies the water content, the blending amount of the surfactant, and the transparency of the appearance has not been proposed.

An object of the present invention is to provide a transparent liquid cosmetic which can increase the amount of an aqueous component contained in an oil with a small amount of a surfactant.

As a result of diligent studies in view of the above matters, the present inventors have found that (A) a hydrocarbon oil that is liquid at room temperature, (B) a specific polyoxyethylene glyceryl fatty acid ester, (C) a polyhydric alcohol or fatty acid, and (D) The above-mentioned problems have been solved by a composition in which water is combined in a specific ratio.

In addition, the present inventors reduced the amount of the surfactant added by mixing the composition with a moisturizing oil component composed of an alkylene oxide derivative as the component (E), and added the aqueous component contained in the oil. We have developed a transparent liquid cosmetic that can be increased in quantity.

That is, the present invention relates to the following (1) and (2).
(1) The following component (A) is contained in an amount of 45 to 85% by mass, the component (B) is contained in an amount of 5 to 15% by mass, the component (C) is contained in an amount of 5 to 20% by mass, and the component (D) is contained in an amount of 3 to 30% by mass. The ratio ((D) / (A)) of the mass of the component (D) to the mass of the component (A) is 0.1 or more and 0.6 or less, and the mass of the component (B) An oil-based cosmetic having a ratio ((B) / D)) of the component (D) to mass of 0.5 or more and 1.0 or less.

(A) Hydrocarbon oil that is liquid at room temperature

(B) A polyoxyethylene glyceryl fatty acid ester that is branched and has a saturated fatty acid residue having 6 to 22 carbon atoms , has an esterification rate of 60% to 98%, and a saponification value of 65 to 95. Polyoxyethylene glyceryl fatty acid ester

(C) One or more selected from the group consisting of an alcohol having 16 to 18 carbon atoms having an unsaturated or branched hydrocarbon group and a fatty acid having 16 to 18 carbon atoms having an unsaturated or branched hydrocarbon group.

(D) Water

(2) Further, the moisturizing oil component (E) composed of an alkylene oxide derivative represented by the following formula (1) is contained in an amount of 0.3% by mass or more and 3.0% by mass or less (1). Oily cosmetics.

Z- {O (PO) _l (EO) _m- (BO) _n H} _a ... (1)

(In equation (1),
Z is a residue obtained by removing all hydroxyl groups from a multivalent alcohol having 2 to 4 hydroxyl groups and having 2 to 7 carbon atoms.
a is 2-4,
PO is an oxypropylene group
EO is an oxyethylene group
BO is an oxybutylene group and
l is the average number of moles of the oxypropylene group PO added, which is 1 ≦ l ≦ 30.
m is the average number of moles of the oxyethylene group added, which is 1 ≦ m ≦ 30.
n is the average number of moles of the oxybutylene group BO added, and 1 ≦ n ≦ 2.
When the total of the mass of the oxypropylene group PO and the mass of the oxyethylene group EO is 100 parts by mass, the mass ratio of the oxypropylene group PO is 30 to 90 parts by mass.
The oxypropylene group PO and the oxyethylene group EO are randomly added. )

According to the present invention, in a hydrous oily cosmetic in which an aqueous component is solubilized in an oily component, a transparent liquid capable of reducing the amount of a surfactant added and increasing the amount of the aqueous component contained in the oil. You can get cosmetics. The cosmetic obtained in the present invention solves the problems related to the amount of surfactant, appearance, and water content of the conventional water-containing oil-based cosmetics.

Further, the cosmetic of the present invention can stably achieve high water content by further blending the component (E), so that it can be used as a cleansing agent with a good feel or a water-containing beauty oil in which a water-soluble active ingredient is dissolved in a high concentration. It can be applied.

The transparent cosmetics in the present invention refer to those in which 50 g of each cosmetic is filled in a 100 cc glass container and the hiragana character "A" (1 cm square) at a distance of 5 cm can be read.

The oily cosmetic of the present invention is composed of the following specific component (A), component (B), component (C) and component (D).

(Ingredient (A))
The component (A) is a hydrocarbon oil that is liquid at room temperature, and anything that can be used in ordinary cosmetics can be used. Hydrocarbons are compounds consisting of carbon and hydrogen. The carbon number of this hydrocarbon oil is preferably 15 or more, and preferably 40 or less, from the viewpoint of elongation during use and feel after use. Specific examples of the compound include liquid paraffin, liquid isoparaffin, squalane and the like. Among these, squalane is a hydrocarbon oil that is difficult to solubilize, and is particularly preferably applicable because of its high usefulness of the present invention.

(Component (B))
The component (B) is a polyoxyethylene glyceryl fatty acid ester that is branched and has a saturated fatty acid residue having 12 to 20 carbon atoms, has an esterification rate of 60% to 98%, and has a saponification value of 65 to 95. Is a polyoxyethylene glyceryl fatty acid ester.

The polyoxyethylene glyceryl fatty acid ester has a liquid or solid appearance depending on the number of moles of fatty acid and polyoxyethylene added, but in the present invention, the one that is liquid at room temperature is used. Here, the number of moles of polyoxyethylene added is preferably 12 to 30. Further, the number of carbon atoms of the fatty acid constituting the component (B) is preferably 6 to 22, and more preferably 12 to 20.

Typical examples of the fatty acids constituting the component (B) are caproic acid, capric acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, oleic acid, elaidic acid, petroselinic acid, and linoleic acid. Acids, linolenic acid, arachidonic acid, gadoleic acid, bechenic acid, and elaidic acid. Among these fatty acids, it is most preferable to use isostearic acid from the viewpoint of maintaining the transparency of oily cosmetics.

Specifically, the component (B) includes polyoxyethylene glyceryl distearate, polyoxyethylene glyceryl tristearate, polyoxyethylene glyceryl dioleate, polyoxyethylene glyceryl trioleate, polyoxyethylene glyceryl diisostearate, and tri. Examples thereof include polyoxyethylene glyceryl isostearate.

Among these polyoxyethylene glyceryl fatty acid esters, it is most preferable to use polyoxyethylene glyceryl triisostearate from the viewpoint of water content of oily cosmetics, addition amount of surfactant, and maintenance of transparency.

(Component (C))
The component (C) is one selected from the group consisting of an alcohol having 16 to 18 carbon atoms having an unsaturated or branched hydrocarbon group and a fatty acid having 16 to 18 carbon atoms having an unsaturated or branched hydrocarbon group. There are two or more.

The component (C) is, for example, isostearic acid and isostearyl alcohol as alcohols and fatty acids having 16 carbon atoms, and oleic acid, linoleic acid, linolenic acid, erizyl alcohol, oleyl alcohol and linoleyl as alcohols and fatty acids having 18 carbon atoms. Alcohol can be mentioned.

(Component (D))
The component (D) is water, and examples thereof include purified water, distilled water, and ion-exchanged water.

(composition)
In the oil-based cosmetics of the present invention, the mass ratio of each component satisfies the following conditions. However, the total value of the masses of the component (A), the component (B), the component (C) and the component (D) is set to 100% by mass. However, when the oily cosmetic of the present invention also contains the component (E), the total mass of the component (A), the component (B), the component (C), the component (D) and the component (E). The value is 100% by mass.

At this time, from the viewpoint of the present invention, the mass of the component (A) is 45 to 85% by mass, but 50 to 80% by mass is more preferable from the viewpoint of emollient feeling and transparency. Further, it is more preferable that the ratio of the component (B) is 5 to 15% by mass from the viewpoint of water content and usability. The ratio of the component (C) is 5 to 20% by mass, but it is more preferable to set it to 7 to 15% by mass from the viewpoint of water content and transparency. Further, the ratio of the component (D) is set to 3 to 30% by mass, but it is more preferable to set it to 15 to 30% by mass from the viewpoint of usability and transparency.

The ratio ((D) / (A)) of the mass of the component (D) (water) to the mass of the component (A) (hydrocarbon raw oil liquid at room temperature) is 0.1 or more and 0.6 or less. This makes it easier to obtain transparent cosmetics. From this point of view, ((D) / (A)) is more preferably 0.25 or more, and further preferably 0.5 or less.

In addition, the ratio of the mass of the component (B) (polyoxyethylene glyceryl fatty acid ester) to the mass of the components (D) and (water) ((B) / (D)) shall be 0.5 or more and 1.0 or less. This makes it easier to obtain transparent or translucent cosmetics.

(Component (E))
In a preferred embodiment, the cosmetic of the present invention further contains an alkylene oxide derivative moisturizing oil component (E). The component (E) is represented by the formula (1). By containing this alkylene oxide derivative, the transparency of the cosmetic can be further improved.

Z- {O (PO) _l (EO) _m- (BO) _n H} _a ... (1)

In the formula (1), Z has 2 to 4 hydroxyl groups and is a residue obtained by removing all the hydroxyl groups from the polyhydric alcohol having a total carbon number of 2 to 7. a is the number of hydroxyl groups of the compound Z, which is 2 to 4. As a polyhydric alcohol having 2 to 4 hydroxyl groups and having 2 to 7 carbon atoms, ethylene glycol and propylene glycol are used when a = 2, glycerin and trimethylolpropane are used when a = 3, and a = 4. Examples thereof include pentaerythritol, sorbitan and methylglycoside. Moreover, you may use a mixture of these. a is more preferably 2 to 3. When a is 2 to 3, the transparency and stability of the cosmetic are further improved.

In the formula (1), PO is an oxypropylene group, l is the average number of moles of oxypropylene group PO added, and 1 ≦ l ≦ 30. The oxypropylene group is an oxypropylene group generated by ring-opening addition of methyloxylane, and is an oxymethylethylene group [-OCH (CH ₃ ) CH _2- ]. If l is less than 1, the transparency and stability of the cosmetic may deteriorate. If l exceeds 30, stickiness at the time of application occurs and the function as a cosmetic is deteriorated. Therefore, the value is 1 to 30, preferably 1 to 20 and particularly preferably 1 to 10.

In the formula (1), EO is an oxyethylene group, m is the average number of moles of oxyethylene group EO added, and 1 ≦ m ≦ 30. The oxyethylene group is an oxyethylene group [-OCH ₂ CH _2- ] generated by ring-opening addition of ethylene oxide. If m is less than 1, foaming may occur at the time of filling, and if m exceeds 30, stickiness at the time of application occurs. Therefore, it is set to 1 to 30, but 1 to 20 is preferable, and 1 to 1 10 is particularly preferable.

BO is an oxybutylene group, n is the average number of moles of oxybutylene group BO added, and 1 ≦ n ≦ 2. The oxybutylene group is an oxybutylene group generated by ring-opening addition of ethyloxylan, and is an oxyethylethylene group [-OCH ₂ (CH ₂ CH ₃ ) CH _2- ]. By setting n to 1-2, the transparency of the cosmetic is further improved.

When the total of the mass of the oxypropylene group PO and the mass of the oxyethylene group EO is 100 parts by mass, the transparency of the cosmetic is further improved by setting the mass ratio of the oxypropylene group PO to 30 to 90 parts by mass. do.

In the component (E), the oxypropylene group PO and the oxyethylene group EO are randomly added. This reduces stickiness during application and foaming during filling.

In a preferred embodiment, the cloud point of the 5% by mass aqueous solution of the water-soluble alkylene oxide derivative (E) of the component (E) is 15 ° C. or higher, more preferably 25 ° C. or higher, still more preferably 35 ° C. or higher. Is. By setting the cloud point to 15 ° C. or higher, the transparency and stability of the cosmetic are improved.

This cloud point is defined in JIS K 3211 "Surfactant Terminology" as "a temperature at which white turbidity begins when the temperature of the aqueous surfactant solution is raised. Normally, white turbidity occurs and phase separation occurs." It can be measured by the following method. After putting a 5% by mass aqueous solution of the alkylene oxide derivative in a test tube to a height of about 40 mm, put a thermometer in this and stir well with a thermometer to a temperature about 2 to 3 ° C higher than the temperature at which clouding occurs. The cloud point can be set as the temperature at which the temperature becomes transparent after being heated and air-cooled with good stirring again. When the solution is cloudy at room temperature, cool it with good stirring until the solution becomes transparent, gradually warm it to a temperature at which turbidity occurs while stirring well again, and then gradually stir. The temperature at which it cools and becomes transparent can be measured and used as a cloud point.

(Other additives)
Additives commonly used in cosmetics can be appropriately added to the cosmetics of the present invention, if necessary. The additive is not particularly limited as long as it does not interfere with the object of the present invention, and is, for example, an oil, a surfactant, a moisturizer, a thickener, a coloring material, alcohols, an ultraviolet protective agent, amino acids, vitamins, and whitening. Agents, organic acids, inorganic salts, enzymes, antioxidants, stabilizers, preservatives, bactericides, anti-inflammatory agents, skin activators, blood circulation promoters, antifat leaks, anti-inflammatory agents, metal ion blockers , PH adjusters, astringents, preservatives, fragrances, pigments and the like.

Hereinafter, the present invention will be described in detail with reference to Examples, but the present invention is not limited to the Examples. The blending amount in the examples is in "mass%" units.

<Examples and reference examples >
The oil-based cosmetics were prepared according to the following production methods with the compositions shown in Tables 1 and 2. Then, the water content of the oil-based cosmetics having each composition, irritation and stickiness caused by the activator, and the appearance of the oil-based cosmetics were evaluated, and the results are shown in Tables 1 and 2.

<Comparative Examples 1 to 9>
The oil-based cosmetics were prepared according to the following production methods with the compositions shown in Tables 3 and 4. The water content of the oil-based cosmetics of each composition, irritation and stickiness caused by the activator, and the appearance of the oil-based cosmetics were evaluated, and the results are shown in Tables 3 and 4.

<Manufacturing method>
Step I: The components (A), (B), (C) and (E) in each table were put into a beaker and stirred with a stirrer at room temperature.
Step II: Water (D) at room temperature was slowly added to the composition prepared in Step I with stirring to obtain an oily cosmetic.

<Water content>
The mass ratio of (D) water to (A) liquid hydrocarbon oil of each adjusted cosmetic, that is, (D) / (A) was calculated and evaluated according to the following criteria.

⊚: Solution in which (D) / (A) is 0.3 or more and transparent in appearance ○: Solution in which (D) / (A) is 0.1 to 0.3 and transparent in appearance ×: ( A solution in which the appearance of D) / (A) is smaller than 0.1, or a solution in which the appearance is opaque.

<Stickiness due to activator>
0.2 mL of the sample was applied to the forearms of 10 panelists, and the sensory evaluation of the stickiness of the oil-based cosmetics was performed according to the following criteria.

3 points: The panelists felt almost no stickiness.
2 points: The panelists felt a little sticky.
1 point: The panelist felt strongly sticky.

Furthermore, the total score of the evaluation of 10 panelists was judged according to the following criteria.

◎: 25 points or more (oil-based cosmetics have almost no stickiness)
◯: 20 points or more and less than 25 points (oil-based cosmetics are slightly sticky)
Δ: 15 points or more and less than 20 points (oil-based cosmetics are sticky)
×: Less than 15 points (oil-based cosmetics are strongly sticky)

<Appearance>
50 g of each prepared cosmetic was filled in a 100 cc glass container, and the appearance of the sample immediately after preparation was confirmed. The evaluation was made based on the legibility of the characters (“A”: size 1 cm square: MS Gothic) at a distance of 5 cm through the glass container containing the sample.

◎: Clearly readable ○: Cloudy but readable △: Characters can be seen but not readable ×: Characters cannot be confirmed and are milky

The raw materials used for preparing the compositions in Tables 1 and 2 are as follows.
Super Squalene (JX Trading Co., Ltd., Squalene)
Liquid paraffin (manufactured by NOF CORPORATION, Pearl Dream 4)
Uniox GT-20IS and Uniox GT-30IS (manufactured by NOF CORPORATION, polyoxyethylene glyceryl triisostearate)
Isostearyl alcohol EX (manufactured by Higher Alcohol Industry Co., Ltd., isostearyl alcohol)
PRISOLINE 3503 (manufactured by Croda Japan Co., Ltd., isostearic acid)
WILBRIDE S-753 (manufactured by NOF CORPORATION, PEG / PPG / polybutylene glycol-8 / 5/3 glycerin)

Further, in Tables 3 and 4, the following raw materials were further used.
Uniox ST-30IS (manufactured by NOF CORPORATION, polyoxyethylene sorbitol tetraisostearate)
Nonion LT-20 (manufactured by NOF CORPORATION, polyoxyethylene sorbitan monofatty acid ester)
Uniox GM-8IS (manufactured by NOF CORPORATION, polyoxyethylene glyceryl isostearate)

In the cosmetics of the examples according to the composition of the present invention, a transparent solution in which a large amount of water was solubilized with oil was obtained.

On the other hand, when the amount of the component (B) to be added is less than that of the component (D), that is, when (B) / (D) is 0.5 or less (Comparative Example 1), the component (D) to be added is When the amount of the component (A) is larger than that of the component (A), that is, when (D) / (A) is 0.6 or more (Comparative Example 2) and when the component (C) is not contained (Comparative Example 3), the cosmetics The appearance has become milky.
When the component (B) was not a polyoxyethylene glyceryl fatty acid ester (Comparative Examples 4 to 9), a decrease in water content, irritation and stickiness due to an activator, and an emulsion in appearance occurred.

Claims (2)

The following component (A) is contained in an amount of 45 to 85% by mass, the component (B) is contained in an amount of 5 to 15% by mass, the component (C) is contained in an amount of 5 to 20% by mass, and the component (D) is contained in an amount of 3 to 30% by mass. The ratio ((D) / (A)) of the mass of the component (D) to the mass of the component (A) is 0.1 or more and 0.6 or less, and the mass of the component (B) is the component ( An oil-based cosmetic having a ratio of D) to mass ((B) / D)) of 0.5 or more and 1.0 or less.

(A) Hydrocarbon oil that is liquid at room temperature

(B) A polyoxyethylene glyceryl fatty acid ester that is branched and has a saturated fatty acid residue having 6 to 22 carbon atoms , has an esterification rate of 60% to 98%, and a saponification value of 65 to 95. Polyoxyethylene glyceryl fatty acid ester

(C) One or more selected from the group consisting of an alcohol having 16 to 18 carbon atoms having an unsaturated or branched hydrocarbon group and a fatty acid having 16 to 18 carbon atoms having an unsaturated or branched hydrocarbon group.

(D) Water
The oiliness according to claim 1, further comprising a moisturizing oil component (E) composed of an alkylene oxide derivative represented by the following formula (1) in an amount of 0.3% by mass or more and 3.0% by mass or less. Cosmetics.

Z- {O (PO) _l (EO) _m- (BO) _n H} _a ... (1)

(In equation (1),
Z is a residue obtained by removing all hydroxyl groups from a multivalent alcohol having 2 to 4 hydroxyl groups and having 2 to 7 carbon atoms.
a is 2-4,
PO is an oxypropylene group
EO is an oxyethylene group
BO is an oxybutylene group and
l is the average number of moles of the oxypropylene group PO added, which is 1 ≦ l ≦ 30.
m is the average number of moles of the oxyethylene group added, which is 1 ≦ m ≦ 30.
n is the average number of moles of the oxybutylene group BO added, and 1 ≦ n ≦ 2.
When the total of the mass of the oxypropylene group PO and the mass of the oxyethylene group EO is 100 parts by mass, the mass ratio of the oxypropylene group PO is 30 to 90 parts by mass.
The oxypropylene group PO and the oxyethylene group EO are randomly added. )