JPS6141492B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention aims to improve eye make-up cosmetics containing synthetic resin emulsions as film agents, and more specifically, to improve eye makeup cosmetics containing synthetic resin emulsions as film agents. This invention relates to an eye makeup cosmetic containing an emulsion. There are various types of commercially available eye make-up cosmetics, such as mascara and eyeliner, and in all cases, the speed with which the applied cosmetic dries is an important factor. For example, in the case of mascara, especially for Japanese people who tend to have eyelashes pointing downwards, mascara is very important in preventing it from sticking to the lower eyelids when applied. Eye make-up cosmetics containing synthetic resin emulsion as a film agent are widely used because they have good functions as eye make-up cosmetics such as water resistance and oil resistance, and are easy to remove. This type of eye makeup cosmetic is no exception. Conventionally, in eye makeup cosmetics containing synthetic resin emulsion as a film agent, methods have been used to increase the amount of the film agent or powder, or to mix lower alcohols such as ethanol, in order to improve the drying properties of the applied film. It is being done. however,
Coatings with improved drying properties using these methods may lack smoothness and ease of layering, or may have a sticky feeling, making the finished product unsightly or giving a strange feeling. It has disadvantages such as: Furthermore, viscosity increases due to volatilization of water from containers and tools such as brushes and pens during use, and there is a tendency to form a so-called irreversible film that is not uniformly remixed into the product system after forming a film. This also has the disadvantage of shortening the usable period during which it can maintain its function as an eye makeup cosmetic. Therefore, the current situation is to appropriately balance the drying properties of the coating film, the user, the finished state, and the usable period, and there has been no product that can fully satisfy all of these requirements. The inventors of the present invention have conducted extensive research in order to improve the conventional drawbacks and obtain an eye makeup cosmetic that has a coating film that dries quickly, is easy to use, has a good finish, and has a long shelf life. As a result, an eye make-up cosmetic that solves the above drawbacks by incorporating specific amounts of a specific sucrose fatty acid ester, α-monoglycerin ether, and lower alcohol into an eye make-up cosmetic containing a film agent. They discovered this and completed the present invention. That is, the present invention provides an eye makeup cosmetic containing a synthetic resin emulsion with an average degree of ester substitution of 1.8 or less and a monoester content of 40%.
This invention relates to an eye make-up cosmetic characterized by containing 0.5 to 10% by weight of sucrose fatty acid ester, 0.5 to 10% by weight of α-monoglycerin ether, and 0.1 to 7% by weight of lower alcohol. Next, the configuration of the present invention will be explained in detail. The synthetic resin emulsion used in the present invention is
Any material with high film safety may be used, and any conventionally known material can be used. Examples include acrylic, vinyl acetate, styrene, synthetic rubber, olefin, and alkyd. One or more types are arbitrarily selected from these. The loading is generally 10 to 90% by weight for an emulsion with a resin concentration of 50% by weight. The sucrose fatty acid ester in the present invention preferably has an average degree of ester substitution of 1.8 or less and a monoester content of about 40% or more. Here, the degree of substitution refers to the average number of ester-bonded fatty acids per molecule of sucrose constituting the sucrose fatty acid ester. These sucrose fatty acid esters are dispersible or soluble in water. In addition, the constituent fatty acids of this sucrose fatty acid ester are saturated fatty acids having 8 to 22 carbon atoms,
Unsaturated fatty acids alone or in mixtures. Examples of fatty acids include well-known fatty acids, such as caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, 2-ethylhexanoic acid, isostearic acid, and oleic acid. Can be mentioned. Among these, stearic acid and palmitic acid alone or in combination are preferred. The blending amount is selected within the range of 0.5 to 10% by weight, preferably 1 to 7% by weight. 0.5
If it is less than 10% by weight, the effect on drying properties and usage period will not be sufficient, and if it exceeds 10% by weight, the viscosity will be extremely high and manufacturing will be difficult. As a specific α-monoglycerin ether,
For example, those with saturated linear alcohol residues such as stearyl-α-monoglycerol ether, cetyl-α-monoglycerol ether, behenyl-α-monoglycerol ether, isostearyl-α-monoglycerol ether, 2- Hexadecyl-α-monoglycerin ether, 2-octyl-decyl-α-monoglycerin ether, 2-octadecyl-docosyl-α-monoglycerin ether, 2-dodecyl-hexadecyl-α-monoglycerin ether 2-icosyl-tetracosyl-α Examples include those with saturated side chain alcohol residues such as -monoglycerin ether, and those with unsaturated alcohol residues such as oleyl-α-monoglycerin ether. Among these, it is particularly preferable to use stearyl-α-monoglycerin ether or cetyl-α-monoglycerin ether, in which the alcohol residue is a saturated linear chain, alone or in combination. The blending amount of α-monoglycerin ether is 0.5~
Selected in the range of 10% by weight, preferably 0.5~
It is 7% by weight. If it is less than 0.5% by weight, the effect on drying properties and the period of use will not be sufficient, and if it exceeds 10% by weight, the viscosity will become extremely high, making production difficult, and the stability of the system will also deteriorate. Examples of lower alcohols include ethanol, propanol, and isopropanol, but ethanol and isopropanol are preferred from the viewpoint of cosmetics. The blending amount is 0.1 to 7% by weight.
It is preferably selected within the range of 0.1 to 5% by weight. If it is less than 0.1% by weight, the effect on dryness is not sufficient, and if it exceeds 7% by weight, the effect is recognized, but it is not preferred from the safety point of view since it is used around the eyes. In addition to the above-mentioned essential ingredients, the eye make-up cosmetic composition of the present invention may contain a moisturizing agent, a nonionic surfactant, a pigment, a fragrance, a preservative, etc., as necessary. Of course, these must be used under qualitative and quantitative conditions that do not impair the purpose of the present invention. The eye make-up cosmetic composition of the present invention has good drying properties as a coating film, can be layered smoothly as desired, and does not have a sticky feeling. Therefore, the finish is good and there is no discomfort at all.
Furthermore, the film that forms on containers, brushes, brushes, etc. during use will not make it impossible to use the product;
The usable period can be extended. According to the present invention, when an eye makeup cosmetic is applied to the application site, such as the eyelashes, a dry thin film is formed that does not adhere to the finger even if the surface is quickly touched with the finger. This membrane is a so-called reversible membrane that mixes uniformly with the non-drying parts at will. Reversible films suppress the volatilization of moisture from the inside, so they suitably lengthen the time it takes for the entire film to dry and transform into a coating that no longer dissolves. Furthermore, the film on the surface of the inner contents of the container during use and on the surface of the product on the application brush or brush also maintains a reversible film for a long time. Next, the present invention will be described in detail with reference to examples.
The present invention is not limited thereby. The blending amount is in parts by weight. [Example 1 and Comparative Example 1] Mascara (formulation)

[Table] (Production method) ~ was heated and dissolved at 70°C. on the other hand ~70
The mixture was heated to melt and dispersed at 35°C, and the above mixture was added thereto, followed by dispersion treatment in a homomixer and cooled to 35°C to obtain a film type mascara. (Effect) Using a doctor blade, apply a sample uniformly onto a glass plate measuring 1 mm thick, 6.5 cm long and 9 cm wide using a doctor blade, and heat the sample to a temperature of 25 cm.
It was left in a constant temperature and humidity environment at ℃ and 50% humidity. The weight over time was measured, and the formula was Wo-wx/Wo-W∞×100, where Wo is the weight of the film at the time of application (0 minutes elapsed) and W∞ is the weight of the dry film after the volatile components have completely disappeared. The relationship between the weight Wx and time was plotted using the weight of the membrane after x minutes as the degree of dryness.
The results are shown in the figure. On the other hand, when the surface was touched with a finger, the time required for it to stop adhering to the finger was defined as the dry-to-touch time. The touch dry time of Example 1 and Comparative Example 1 was 35
It was 105 minutes. The surface film at this time was a reversible film in Example 1, and an irreversible film in Comparative Example 1. As is clear from the figure, the coating film of Example 1 forms a reversible film that does not adhere to the finger in 1/3 of the time compared to Comparative Example 1. Moreover, after the film is formed, it dries gradually, and an irreversible film is not formed until it is almost completely dry. On the other hand, in Comparative Example 1, it took a long time to form a film, and an irreversible film was suddenly formed. This shows that the mascara of Example 1 takes a short time from when it is applied to the eyelashes until it does not adhere to the eyelids, that is, the actual drying time is short. Moreover, since this membrane is reversible, it can be said that it can be used for a longer period of time compared to Comparative Example 1. Next, we evaluated the product through actual use tests. In the actual use test, 20 people who had experience using film type mascara were used as test subjects, and Example 1 and Comparative Example 1 were used alternately until the test subjects judged that they could no longer use the mascara. Table 1 shows the results of the actual use test.

[Table] As is clear from the actual use test results in Table 1,
The mascara according to the present invention dries quickly when applied,
It was also confirmed that it can be used for a long period of time, has good usability, and has sufficient functionality as a mascara. [Example 2] Mascara (formulation) Stearyl-α-monoglycerin ether
4 parts Cetyl-α-monoglycerin ether 2 Polyoxyethylene sorbitan monolauride (number of moles of ethylene oxide added: 20) 1 Dipropylene glycol 4 Sucrose stearate (degree of substitution 1.2,
Monoester content 80% by weight) 6 Sucrose oleate ester (degree of substitution 1.6, monoester content 40% by weight) 3 Polyvinyl acetate emulsion (50%) 10 Polyacrylic ester emulsion (50%)
%) 20 Ion-exchanged water 35.6 Isopropyl alcohol 4 Iron oxide 10 Bentonite 0.4 Flavor Appropriate amount Preservative (Production method) ~ was dissolved by heating at 70°C. On the other hand, ~
Dissolve and disperse by heating at 70°C, add the above mixture to this, perform dispersion treatment with a homomixer,
A film type mascara was obtained by cooling to ℃. As a result of conducting a practical use test in the same manner as in Example 1, it was confirmed that it dries quickly when applied, can be used for a long time, is easy to use, and has sufficient functionality as a mascara. Ta. [Example 3] Mascara (formulation) Stearyl-α-monoglycerin ether
9 parts polyoxyethylene sorbitan monolaurate (number of moles of ethylene oxide added: 20) 1 sorbitan monostearate 1 beeswax 10 propylene glycol 3 sucrose stearate (degree of substitution 1.6,
Monoester content 40% by weight) 6 Polyvinyl acetate emulsion (50%) 20 Polystyrene-butadiene emulsion (50%)
%) 20 Ion-exchanged water 21.2 Ethanol 0.5 Iron oxide 8 Bentonite 0.3 Flavor Appropriate amount Preservative (Production method) ~ was dissolved by heating at 70°C. on the other hand ~70
Dissolve and disperse by heating at ℃, add the above mixture to this, emulsify and disperse in a homomixer,
It was cooled to 35°C to obtain an emulsion film type mascara. As a result of conducting a practical use test in the same manner as in Example 1, it was confirmed that the mascara dries quickly when applied, can be used for a long time, has good usability, and has sufficient functionality as a mascara. . [Example 4 and Comparative Example 2] Eyeliner (prescription)

[Table] (Production method) ~ was heated and dissolved at 70°C. on the other hand
Dissolve and disperse by heating at 70°C, add the above mixture to this, perform dispersion treatment with a homomixer,
The eyeliner was obtained by cooling to ℃. The product was evaluated through actual use tests. In the practical use test, 20 people with experience using eyeliner were used as test subjects, and Example 4 and Comparative Example 2 were used alternately until the test subjects judged that they could no longer use the eyeliner. The results are shown in Table 2.

[Table] As is clear from the actual use test results in Table 2,
It was confirmed that the eyeliner according to the present invention dries quickly when applied, can be used for a long period of time, has good usability, and has sufficient functionality as an eyeliner.

[Brief explanation of the drawing]

The figure shows the drying rate of the coating films of Example 1 of the present invention and Comparative Example 1. In the figure, the symbols at each measurement point indicate the properties of the film, as shown below. -●-: It sticks to your finger when you touch the sample and does not form a film. ―Γ―: A reversible film that does not adhere to the finger. 〓―: An irreversible film that does not adhere to the finger.

Claims (1)

[Claims] 1 Average degree of ester substitution in eye makeup cosmetics containing synthetic resin emulsions
It is characterized by blending 0.5-10% by weight of sucrose fatty acid ester with a monoester content of 1.8 or less and 40% by weight or more, 0.5-10% by weight of α-monoglycerin ether, and 0.1-7% by weight of lower alcohol. Eye makeup cosmetics.