JP2023105025A - Cleansing cosmetic - Google Patents

Abstract

To provide a cleansing cosmetic which is transparent, reduces a frictional feeling and dripping when the cleansing cosmetic is applied to the skin, has excellent cleansing power and gives refreshed feeling after washing up.SOLUTION: There is provided a cleansing cosmetic which comprises the following components (A) to (D). (A) an ester oil having a relative permittivity at 25°C of 2.6 to 3.6, (B) a nonionic surfactant, (C) a polyol and (D) water.SELECTED DRAWING: None

Description

The present invention relates to cleansing cosmetics containing liquid oil.

There are various dosage forms of cleansing cosmetics for makeup removal, including emulsified cream-like or emulsion-like compositions, oil-based liquid compositions, aqueous-based liquid/gel compositions, and the like. Among these, oily liquid compositions are generally called cleansing oils, and are widely used because they have the best cleansing effect of removing cosmetics and dirt on the skin.
However, when the cleansing oil is picked up or applied to the skin, it tends to drip off, and there are cases where the usability is poor, such as giving a feeling of friction during the cleansing action.

Therefore, in order to increase the viscosity of the cleansing oil cosmetic and improve usability, for example, in Patent Documents 1 and 2, an oily thickener such as dextrin fatty acid ester or (behenic acid / eicosanedioic acid) glyceryl was used. technology has been published. However, although it is difficult to drip from the fingers and improves usability, there are problems such as loss of transparency and feeling of oil remaining on the skin after rinsing, so-called slipperiness and stickiness. rice field.

Furthermore, in Patent Document 3, a cleansing cosmetic that combines linear saturated fatty acids with 18 to 22 carbon atoms, saturated fatty acids with 8 to 14 carbon atoms and polyglycerol with an average degree of polymerization of 2 to 15 drips during cleansing. Cleansing oil cosmetics that are excellent in cleansing effects that are easy to use and have good compatibility with makeup cosmetics have been disclosed, but as a result of pursuing the difficulty of dripping, it was applied to the face. In some cases, the composition did not spread well when applied, did not provide a sufficient familiarity with the make-up cosmetic, and was inferior in the make-up removing effect.

In Patent Document 4, an external preparation for skin containing a diester of carbonic acid diester and dimer acid or dimer diol shows an excellent effect in removing keratotic plugs. There was a problem that the burden on the skin was large, and the moisturizing feeling was lost after washing, and the feeling of tightness was felt.

JP 2003-252726 JP 2003-267835 JP 2010-100587 JP 2007-119401

The present invention was completed in order to solve these background arts, and its object is to provide a cleansing cosmetic that is transparent, does not drip, has excellent cleansing power, and has an excellent refreshing feeling after washing. to do.

As a result of intensive research aimed at solving this problem, the present inventors have found that the above requirements can be satisfied by combining ester oils having specific dielectric constants, and have completed the present invention.
Thus, according to the present invention, a cleansing cosmetic containing the following components (A) to (D) is provided.
(A) Ester oil with a dielectric constant of 2.6 to 3.6 at 25° C. (B) Nonionic surfactant (C) Polyol (D) Water

The ester oil with a specific relative dielectric constant used in the present invention can be used as a transparent and stable cleansing preparation, and maintains a good feeling during washing by maintaining viscosity while reducing friction. can be done. In addition, it blends well with cosmetics, can be washed away cleanly, and can reduce the burden on the skin after washing to prevent a tight feeling.

Since substances with high dielectric properties have polar groups in their molecules, they have a high affinity with other substances having polar groups. Therefore, while contributing to the storage stability of the formulation of the cosmetic, the polarity similarly affects the cleansing ability, which affects the ease of dissolving the cosmetic, and when the cleansing cosmetic is washed away with water. Therefore, various oils were optimized based on the dielectric constant.

Relative permittivity (ε _r ) is a unitless value that is obtained by dividing the permittivity (ε) of a sample by the permittivity of vacuum (ε ₀ ). Since the dielectric constant of a vacuum and the dielectric constant of air are almost the same, the dielectric constant of a sample (ε) is divided by the dielectric constant of an empty container, that is, the dielectric constant of air (ε _air ). . As a method for measuring the relative dielectric constant of the oil, for example, it can be measured by using a liquid dielectric constant meter Model 871 manufactured by Nippon Ruft Co., Ltd.

Then, surprisingly, by using the relative dielectric constant of the oil agent as a standard, it is possible to select an ester oil that satisfies each of the above-mentioned performances required for cleansing cosmetics with a suitable balance. did it. That is, the ester oil of component (A) is not particularly limited, but is an ester oil having a dielectric constant in the range of 2.6 to 3.6 at 25° C. For example, ethylhexyl isononanoate (relative dielectric constant 3.4) , isopropyl myristate (relative dielectric constant 3.2), isoamyl laurate (relative dielectric constant 3.3), hexyl laurate (relative dielectric constant 3.3), isononyl isononanoate (relative dielectric constant 3.2), palmitin Isopropyl acid (relative dielectric constant 3.1), isodecyl isononanoate (relative dielectric constant 3.2), ethyl isostearate (relative dielectric constant 3.1), isopropyl isostearate (relative dielectric constant 3.1), ethylhexanoic acid hexyldecyl (relative dielectric constant 3.1), isotridecyl isononanoate (relative dielectric constant 3.1), neopentyl glycol diethylhexanoate (relative dielectric constant 3.5), isobutyl isostearate (relative dielectric constant 3.2), Ethylhexyl palmitate (relative dielectric constant 3.0), cetyl ethylhexanoate (relative dielectric constant 3.0), isostearyl neopentanoate (relative dielectric constant 3.1), neopentyl glycol dicaprate (relative dielectric constant 3.3 ), isocetyl myristate (relative dielectric constant 2.9), neopentyl glycol diisononanoate (relative dielectric constant 3.3), octyldodecyl myristate (relative dielectric constant 2.8), isocetyl stearate (relative dielectric constant 2.8). 8), hexyldecyl isostearate (relative dielectric constant 2.8), isostearyl isostearate (relative dielectric constant 2.8), jojoba seed oil (relative dielectric constant 2.7), trimethylolpropane triethylhexanoate (relative dielectric constant 3.5), octyldodecyl stearoyloxystearate (relative dielectric constant 3.0), diisopropyl dilinoleate (relative dielectric constant 3.2), triisostearin (relative dielectric constant 3.0), trimethylolpropane triisostearate (relative dielectric constant 2.9), pentaerythrityl tetraisostearate (relative dielectric constant 2.7), polyglyceryl-2 triisostearate (relative dielectric constant 3.6), etc., one or two of these The above can be used.

The content of the component (A) in the cleansing cosmetic composition of the present invention is 60 to 84% by weight, preferably 64 to 80% by weight, more preferably 68 to 77% by weight, thereby providing a suitable cleansing power. can have

The nonionic surfactant of component (B) is not particularly limited, and examples thereof include polyoxyethylene alkyl ethers such as polyoxyethylene cetyl ether, polyoxyethylene stearyl ether, polyoxyethylene lauryl ether, and polyoxyethylene behenyl ether. Glycol fatty acid esters such as ethylene glycol monostearate, ethylene glycol distearate, and ethylene glycol dioleate, sorbitan fatty acid esters such as sorbitan monooleate, sorbitan monostearate, and sorbitan sesquioleate, polyethylene glycol monostearate , polyethylene glycol monoisostearate, polyethylene glycol monooleate, polyethylene glycol dilaurate, polyethylene glycol distearate, polyethylene glycol diisostearate, polyethylene glycol fatty acid esters such as polyethylene glycol dioleate, polyoxyethylene glyceryl isostearate, triisostearate Polyoxyethylene glyceryl fatty acid esters such as polyoxyethylene glyceryl laurate, polyoxyethylene hydrogenated castor oil laurate, polyoxyethylene hydrogenated castor oil isostearate, polyoxyethylene hydrogenated castor oil triisostearate, etc. Polyoxyethylene hydrogenated castor oil fatty acid esters, polyglycerol fatty acid esters such as coconut oil fatty acid polyglyceryl, polyglyceryl distearate, polyglyceryl tristearate, polyglyceryl diisostearate, polyglyceryl triisostearate, polyoxyethylene-methylpolysiloxane copolymer , polyether-modified silicones such as poly(oxyethylene/oxypropylene) methylpolysiloxane copolymer, silicone-based surfactants such as polyglycerin-modified silicone, alkyl-modified polyether-modified silicone, and alkyl chain co-modified polyether-modified silicone etc.

Among these, one or more selected from polyethylene glycol fatty acid esters, polyoxyethylene glycerin fatty acid esters, and polyglycerin fatty acid esters are preferred from the viewpoint of ease of use such as good make-up removal and clean feeling after rinsing off.

The content of component (B) in the cleansing cosmetic composition of the present invention is 10 to 34% by weight, preferably 15 to 29% by weight, more preferably 19 to 25% by weight. Reduced, clear cleansing cosmetics can be provided.

The polyol of component (C) is not particularly limited, but glycerin, pentylene glycol, butylene glycol, propylene glycol, dipropylene glycol and the like can be mentioned, with glycerin being more preferred.

The content of component (C) in the cleansing cosmetic composition of the present invention is 0.1 to 5% by weight, preferably 0.5 to 4.0% by weight, more preferably 1.0 to 3.5% by weight. By doing so, a moisturizing feeling after washing can be imparted.

The content of water in component (D) in the present invention is 0.1 to 5% by weight, preferably 0.5 to 4.0% by weight, more preferably 1.0 to 3.5% by weight. This makes it possible to adjust the viscosity of the cleansing cosmetic appropriately and provide a transparent cleansing agent.

Furthermore, in addition to the above ingredients, conventional additives can be added to the cleansing cosmetic composition of the present invention as long as they do not impair the effects of the present invention. For example, silicone oil, alcohols such as ethanol, paste oils such as lanolin, semi-solid oils such as vaseline, shea butter, solid fats such as hydrogenated palm kernel oil, extracts, medicinal agents, beauty ingredients, whitening agents, sterilization agents, antibacterial agents, anti-inflammatory agents, thickening gelling agents, surfactants, preservatives, antioxidants, UV absorbers, UV scattering agents, moisturizers, neutralizers, chelating agents, pH adjusters, fragrances, Substances normally blended in oily cosmetics such as pigments and vitamins can be included.

EXAMPLES The present invention will be described in more detail below based on examples, but the present invention is not limited by these examples. The compounding amount of each component represents "% by weight" unless otherwise specified.

The formulations listed in Table 1 were prepared by the following method. The obtained cleansing cosmetics were evaluated in terms of transparency, cleansing power, feeling of use (dripping), and ease of rinsing.

<Preparation method>
(1) The oil phase is mixed and heated to 50° C. to dissolve uniformly.
(2) Mix the aqueous phases and dissolve uniformly at room temperature.
(3) Slowly add the water phase while stirring the oil phase to dissolve uniformly.

<Evaluation of transparency>
The transparency of the prepared cleansing cosmetic was visually confirmed.
○: No separation and cloudiness observed, transparent ×: Separation and / or cloudiness observed In addition, phase separation and precipitation of contents in each test sample were observed, respectively, "X: separation and / Or cloudiness".

<sensory evaluation>
A single trained female rating panel evaluated each test sample for cleansing power, usability (dripping), and ease of rinsing.
First, lipstick was applied to the inside of the forearm. Next, 0.5 mL of the test sample was dropped, rubbed with a finger to blend with the lipstick, and then washed off with lukewarm water. The cleansing power, usability (liquid dripping), and easiness of rinsing at this time were evaluated according to the following criteria.
Samples for which evaluation was difficult due to phase separation or precipitation of contents in the test sample were indicated as "-", indicating that evaluation was not possible.
"Cleansing Power"
○: Good △: Not so good ×: Not good -: Evaluation not possible "Difficulty in dripping"
○: Difficult to drip △: Slightly dripping ×: Easy to drip -: Unevaluable "Clean feeling after washing"
○: Good △: Not so good ×: Not good -: Evaluation not possible

<Evaluation results>
Table 1 shows the above results.
In Example 1, when octyldodecyl stearoyloxystearate having a dielectric constant of 3.0 was used as the ester oil of (A), it was uniformly dissolved and a transparent formulation could be obtained. In addition, while it was excellent in cleansing power and a refreshing feeling when washed off, it was difficult to drip.
On the other hand, Comparative Example 1, which is a formulation using dipentaerythrityl hexaisononanoate (relative dielectric constant 4.2) with a high dielectric constant, is a transparent preparation that dissolves uniformly, but has a low removal rate and easy rinsing. Inferior, the cleansing power was low and the feeling of freshness when washed off was also poor. Based on this, it was confirmed that a cleansing cosmetic material having a well-balanced formulation can be achieved using the dielectric constant as a guideline.

Comparative Example 2 was a formulation prepared only with an oil having a high relative dielectric constant, and when left to stand for 24 hours after mixing, it separated into two layers, resulting in a poorly stable and uniform formulation. Comparative Example 3 is a formulation in which only mineral oil (relative dielectric constant 2.2), which has a low dielectric constant and is generally used as a cleansing agent, is blended as an oil agent. It became easy to drip, the cleansing power was inferior, and furthermore, the sticky feeling was felt after rinsing. Comparative Example 4 is a formulation obtained by removing the aqueous phase from Example 1. Turbidity occurred in the formulation immediately after preparation, and the formulation separated into two layers after standing still for 24 hours.
In any of the comparative examples, it was confirmed that the viscosity, the cleansing power, and the stability of the formulation were out of balance by deviating from the range of the dielectric constant of the ester oil.

From the above evaluation results, by appropriately combining each of the components (A) to (D) of the present invention, the transparency of the formulation, good cleansing power, feeling of use (dripping), and clean feeling after rinsing. It was shown that a cleansing cosmetic excellent in

The cleansing cosmetic of the present invention can be used for the purpose of removing oily stains such as makeup cosmetics. It also reduces dripping and friction, and has good cleansing power.

Claims (6)

A cleansing cosmetic characterized by containing the following components (A) to (D).
(A) Ester oil with a dielectric constant of 2.6 to 3.6 at 25° C. (B) Nonionic surfactant (C) Polyol (D) Water Component (A) is ethylhexyl isononanoate, isopropyl myristate, isoamyl laurate, hexyl laurate, isononyl isononanoate, isopropyl palmitate, isodecyl isononanoate, ethyl isostearate, isopropyl isostearate, hexyldecyl ethylhexanoate, isononane isotridecyl acid, neopentyl glycol diethylhexanoate, isobutyl isostearate, ethylhexyl palmitate, cetyl ethylhexanoate, isostearyl neopentanoate, neopentyl glycol dicaprate, isocetyl myristate, neopentyl glycol diisononanoate, octyldodecyl myristate, stearin Isocetyl acid, hexyldecyl isostearate, isostearyl isostearate, jojoba seed oil, trimethylolpropane triethylhexanoate, octyldodecyl stearoyloxystearate, diisopropyl dilinoleate, triisostearin, trimethylolpropane triisostearate, pentaeryth tetraisostearate The cleansing cosmetic according to claim 1, which is one or more selected from lytyl and polyglyceryl-2 triisostearate. The nonionic surfactant of component (B) is polyoxyethylene alkyl ether, glycol fatty acid ester, sorbitan fatty acid ester, polyethylene glycol fatty acid ester, polyoxyethylene glycerin fatty acid ester, polyoxyethylene hydrogenated castor oil fatty acid ester, polyglycerin. The cleansing cosmetic according to Claim 1, which is one or more selected from fatty acid esters, polyether-modified silicones, polyglycerin-modified silicones, alkyl-modified polyether-modified silicones, and alkyl chain co-modified polyether-modified silicones. The cleansing cosmetic according to claim 3, wherein the nonionic surfactant is selected from polyethylene glycol fatty acid esters, polyoxyethylene glycerin fatty acid esters, and polyglycerin fatty acid esters. The cleansing cosmetic according to Claim 1, wherein the component (C) is one or more selected from glycerin, pentylene glycol, butylene glycol, propylene glycol, and dipropylene glycol. The component (A) is 60 to 84% by weight with respect to the entire cleansing cosmetic, the component (B) is 10 to 34% by weight, the component (C) is 0.1 to 5.0% by weight, and the component (D) is The cleansing cosmetic according to claim 1, characterized in that it is contained in a proportion of 0.1 to 5.0% by weight.