TWI767078B - Eyelash cosmetic - Google Patents

Abstract

The eyelash cosmetic of the present invention contains a polyurethane and a polar solvent.

Description

Eyelash Cosmetics

The present invention relates to eyelash cosmetics.

Conventionally known eyelash cosmetics (mascara, eye makeup) are: waterproof type (hereinafter referred to as "WP type") composed of oily materials that attach importance to water resistance and curling power, do not require special makeup removers, etc. Only use warm A thin film type (hereinafter referred to as "FM type") that emphasizes easy makeup removal that can be easily removed with water. However, in recent years, the demand for water resistance, curling power, and easy makeup removal has not been able to meet this demand.

The FM type system uses water as a base material, and performs film formation using urethane emulsion (Patent Document 1) and the like. Although the mascara is easy to remove, its curling force is significantly worse than that of the WP type, and it cannot meet the market demand. In particular, since the polyurethane film is soft, it is necessary to mix a large amount of oil-based components such as wax as in Patent Document 1, or to increase the glass transition point (Tg) by mixing with an acrylic emulsion as in Patent Document 2. Compensate for curling force. The eyelash cosmetic materials described in Patent Documents 3 and 4 contain polyurethane and propylene carbonate as an activator for an organic mineral thickener. The eyelash cosmetic described in Patent Document 5 contains a polymer dye selected from the group consisting of sulfopolyester, polyamide, polyurethane, and polyacrylic acid polymer, or the like mixture.

[Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2011-126884

[Patent Document 2] Japanese Patent Laid-Open No. 2015-193551

[Patent Document 3] Japanese Patent Laid-Open No. 2008-195732

[Patent Document 4] Japanese Patent Laid-Open No. 2008-120805

[Patent Document 5] Japanese Patent Publication No. 2000-513002

As described above, the known eyelash cosmetic has room for improvement, and a novel eyelash cosmetic is expected.

In order to solve the above-mentioned problems, the inventors of the present invention have conducted intensive studies, and as a result, they have found that by adding a polar solvent to polyurethane, the water resistance and stretchability can be greatly improved, and the present invention has been completed.

That is, the present invention relates to the following.

Invention 1

An eyelash cosmetic, which is an eyelash cosmetic containing polyurethane and a polar solvent, wherein the polar solvent contains a mono- or dialkyl (C1-C4) ether from a glycol or an ester compound with a C2-C6 carboxylic acid , at least one selected from the group consisting of alkene carbonate (C2-C4) ester compounds and ketone alcohols (C3-C6).

Invention 2

The eyelash cosmetic according to Invention 1 is substantially free of polymer dyes selected from sulfopolyester, polyamide, polyurethane, and polyacrylic acid polymers, and mixtures thereof.

Invention 3

The eyelash cosmetic according to Invention 1 or 2, wherein the polar solvent contains a group consisting of methyl glycol, ethoxyethanol, butoxyethanol, ethoxydiglycol, butoxydiglycol, and dimethoxydiethylene glycol. At least one selected from the group consisting of glycol, diethoxydiglycol, 2-ethoxyethyl acetate, hydroxyacetone and diacetone alcohol.

Invention 4

The eyelash cosmetic according to Invention 3, wherein the polar solvent contains a group consisting of methyl glycol, ethoxyethanol, butoxyethanol, ethoxydiglycol, butoxydiglycol, and dimethoxydiglycol , at least one selected from the group consisting of diethoxydiglycol, hydroxyacetone and diacetone alcohol.

Invention 5

The eyelash cosmetic according to Invention 4, wherein the polar solvent contains at least one selected from the group consisting of ethoxydiglycol, propylene carbonate, and diacetone alcohol.

Invention 6

The eyelash cosmetic according to Invention 5, wherein the polar solvent contains at least one selected from the group consisting of ethoxydiglycol and diacetone alcohol.

The eyelash cosmetic of the present invention has strong makeup durability against sweat, sebum, etc., and can be easily removed with warm water. The preferred aspect is high curling force and excellent finish.

Figure 1 shows the water resistance test results of Example 1 (BAYCUSAN C1010 only).

Figure 2 shows the water resistance test results of Example 2 (BAYCUSAN C1010+ethoxydiglycol).

Figure 3 shows the results of the water resistance test of Example 3 (BAYCUSAN C1010+propylene carbonate).

Figure 4 shows the results of the water resistance test of Example 4 (BAYCUSAN C1010+diacetone alcohol).

Figure 5 shows the water resistance test results of Example 5 (BAYCUSAN C1010+triethyl citrate).

Figure 6 shows the results of the water resistance test of Example 6 (BAYCUSAN C1010+ethoxyethanol).

Figure 7 shows the water resistance test results of Example 7 (BAYCUSAN C1010+butoxydiglycol).

Figure 8 shows the water resistance test results of Example 8 (BAYCUSAN C1010+Hydroxyacetone).

FIG. 9 is a photograph of the curling force evaluation test of the prescriptions using Example 9, Example 10, Example 11, Example 12, and Example 13. FIG.

Figure 10 is a schematic diagram of the measurement of the curling angle.

Various alternative forms are possible in the present invention, and this specification is intended to describe in detail specific aspects of the present invention. However, the detailed description of a specific aspect in this specification is not intended to limit the present invention to the specific aspect, and the present invention covers all alternative forms within the true meaning and scope of the present invention defined in the scope of the patent application.

Definition [eyelash cosmetic]

Eyelash cosmetic or cosmetic for eyelashes, also known as mascara, eye cosmetic, is used to make eyelashes appear thicker, longer and/or curled.

The form of the eyelash cosmetic of the present invention is not particularly limited. For example, liquid form, emulsion form, gel form, cream form, solid form, etc. are mentioned.

[Polyurethane]

The eyelash cosmetic of the present invention contains one or two or more types of polyurethanes (urethane resins). What is necessary is just the urethane type which is cosmetically acceptable. For example: polyurethane-1~81, polyurethane cross-linked polymer-1~2, etc. (refer to the list of cosmetic ingredients labeling names issued by the Japan Cosmetic ) published On-Line INFOBASE, etc.). More preferably, it contains hexamethylene diisocyanate or dicyclohexylmethane diisocyanate as diisocyanate monomers, and 1,4-butanediol or 1,6-hexanediol as diol monomers. For example, polyurethane-32, polyurethane-34, polyurethane-35, etc. are mentioned. It can be 100% pure or diluted. Diluted can be a solution, an emulsion, or a suspension. One or two or more of these can be arbitrarily selected, but it is not limited to this, and its derivatives can also be used. The content of the polyurethane is 0.04% by mass to 20% by mass, preferably 0.4% by mass to 16% by mass, and more preferably 1.2% by mass to 12% by mass. If it is less than 0.04 mass %, the film of the eyelash cosmetic cannot be easily removed with warm water, and if it exceeds 20 mass %, good curling force cannot be obtained.

[polar solvent]

The eyelash cosmetic of the present invention contains one or two or more polar solvents. The polar solvent system functions as a film-forming aid. The polar solvent is not particularly limited as long as it is cosmetically acceptable and has compatibility with both water and oil. Preferably, it contains mono- or dialkyl (C1~C4) ethers of diols such as ethylene glycol and diethylene glycol, or ester compounds with C2~C6 carboxylic acids, and alkene carbonates (C2~C6) belonging to cyclic carbonates. C4) At least one selected from the group consisting of ester compounds and ketone alcohols (C3-C6). For example, methyl glycol, ethoxyethanol, butoxyethanol, ethoxydiglycol, butoxydiglycol, dimethoxydiglycol, diethoxydiglycol, acetic acid-2- Ethoxyethyl ester, ethylene carbonate, propylene carbonate, butylene carbonate, hydroxyacetone, diacetone alcohol, etc. . One or two or more of these can be arbitrarily selected, but it is not limited to this, and its derivatives can also be used. The content thereof is 0.1% by mass to 25% by mass, preferably 0.5% by mass to 20% by mass, and more preferably 1% by mass to 15% by mass. If it is less than 0.1 mass %, a favorable curling force cannot be obtained, and if it exceeds 25 mass %, a smooth feeling in use cannot be obtained, and the feeling in use is deteriorated.

The eyelash cosmetic of the present invention may further contain one or two or more known cosmetic raw materials that are known to be blended by those skilled in the art, without impairing the effect of the present invention. Examples include: volatile oils, surfactants, gelling agents, anti-caking agents, emulsifiers, dispersants, stabilizers, moisturizing agents, tackifiers, curing agents, binders, extenders, Opacifiers, lubricants, pigments, UV scattering agents, UV absorbers, pH adjusters, antioxidants, antibacterial agents, preservatives, skin care agents, lubricants, astringents, emollients, brighteners, glosses, antiseptics Foaming agent, water repellent coating agent, protective agent, etc. It is also possible to use two or more of these repeated uses/effects.

In one aspect of the present invention, the eyelash cosmetic of the present invention does not substantially contain hard wax. In addition, the so-called "hard wax" is a solid at ambient temperature (25°C), and the state has a reversible solid/liquid state change, and a lipophilic compound with a melting point of 30°C or higher, and shows at 20°C Hardness greater than 5MPa. Here, "substantially not containing" means that the eyelash cosmetic of the present invention does not contain an amount that impairs sebum resistance and/or ease of washing with warm water, for example, does not contain an amount exceeding 12 mass % (or 12 mass % or more). ), more preferably not containing an amount exceeding 5 mass % (or 5 mass % or more).

In one aspect of the present invention, the eyelash cosmetic of the present invention does not substantially contain a composite resin core-shell polymer emulsion. Here, the so-called composite resin core-shell polymer emulsion refers to the following steps (1) to (4) are sequentially performed: (1) In a polymerizable monomer containing a (meth)acrylic monomer having an ester group, In the presence of a polymerizable monomer (component (b)) having a glass transition temperature of 95°C or more and 105°C or less of a polymer obtained by polymerizing it, polypropylene glycol, dimethylolpropionic acid and aliphatic aliphatic or alicyclic polyisocyanate reacts, and generates the urethane prepolymer ((a) component) containing isocyanate group and carboxyl group, and obtains the step of the mixed solution of (a) component and (b) component; ( 2) Neutralize the carboxyl group contained in the component (a) in the mixed solution of the component (a) and the component (b) obtained in (1) with an equivalent of triethanolamine to obtain a neutralized product of the component (a) and (b) ) the step of the mixed solution of the component; (3) the step of emulsifying and dispersing the mixed solution of the (a) component neutralized product and (b) component obtained in (2) in an aqueous medium to obtain an emulsion; (4) ) The step of polymerizing the component (b) in the emulsion obtained in (3) to obtain a composite resin core-shell type polymer emulsion; for those obtained in each step, in step (1), as a polypropylene glycol-based polymer emulsion Two kinds of polypropylene glycol with a number average molecular weight of 1000 and a number average molecular weight of 2000 are used according to the ratio of 94:6~92:8 (mass ratio); the ratio of (a) component and (b) component in the mixed solution is (a) Component: (b) Component (pure mass ratio) = 50:50~60:40 composite resin core-shell polymer emulsion.

The term "substantially not contained" means that, for example, an amount exceeding 1 mass % (or 1 mass % or more) in terms of solid content is not contained, and more preferably an amount exceeding 0.5 mass % (or 0.5 mass % or more) in terms of solid content is not contained. ).

In one aspect of the present invention, the eyelash cosmetic of the present invention does not substantially contain polymer dyes selected from sulfopolyester, polyamide, polyurethane and polyacrylic acid polymers and mixtures thereof.

The term "substantially not contained" means that, for example, it does not contain an amount exceeding 1 mass % (or 1 mass % or more), and more preferably does not contain an amount exceeding 0.5 mass % (or 0.5 mass % or more).

The eyelash cosmetic of the present invention can be produced in accordance with the technical common sense of those skilled in the art and in accordance with customary prescriptions. The blending method, order, etc. of each component can be arbitrary according to the technical common sense of those skilled in the art.

[Example]

Hereinafter, specific examples are given to describe the present invention in more detail, but these embodiments do not constitute any limitation to the technical scope of the present invention. It can be appropriately prepared according to the water resistance, ease of washing with warm water, curling force, and other conditions required by those skilled in the art. In addition, the compounding amount (content) in the following Examples and Comparative Examples is all "mass %".

<Comparison of polar solvents 1> Sample production

As the coating agent system, polyurethane-35 (BAYCUSAN C1010 (containing about 40% of polyurethane-35), manufactured by Covestro Deutschland AG) was used.

In each example, each polar solvent was added so that each polar solvent was 10% of the total amount of the coating agent.

Regarding sebum resistance, water resistance, ease of washing with warm water, drying, stability, and breaking strength (when immersed in water), a mixture of coating agent and polar solvent is used to spread on a glass plate by 60 μm with a doctor blade. And dried for 2 hours as a sample.

For stretchability, use 2g of a mixture of film agent and polar solvent poured into a polysiloxane mold, and dry it in a 45°C thermostat for more than 3 hours to form a uniform thick film. The film taken out from the mold is cut out 0.2cm× 5cm, place a 5kg hammer and place it flat, and use the latter as a sample after letting it cool.

Evaluation test sebum resistance

2 drops of artificial sebum (tri(caprylic/capric) glycerides (O.D.O, manufactured by Nissin Oilio Group)) were dropped on the sample, left to stand for 1 minute and then wiped off, and then the surface state was observed. A reviewer evaluated according to the following criteria. The evaluations shown in Table 1 were obtained in unanimous agreement.

○:‧‧‧Film does not change

△:‧‧‧The film is slightly sticky

×: ‧‧‧The film is obviously sticking and falling off

Water resistance (24 hours immersion test)

The sample was immersed in water at room temperature for 24 hours, and the sample was photographed when 5 seconds, 10 minutes, 30 minutes, 60 minutes, and 24 hours elapsed. Fig. 1 shows an example (Example 1) in which a sample was prepared from only the coating agent. Figures 2 to 8 respectively use ethoxydiglycol (Example 2), propylene carbonate (Example 3), diacetone alcohol (Example 4), triethyl citrate (Example 5), and ethoxyethanol (Figure 6). ), butoxydiglycol ( FIG. 7 ), or hydroxyacetone ( FIG. 8 ) as examples of polar solvents prepared as samples.

The reason why the film appears cloudy is considered to be due to water swelling. In Examples 1 and 5, the samples were dispersed in the immersed water after 60 minutes.

The imaging results were evaluated in two stages by five examiners according to the following criteria, and the results were all agreed and the evaluations shown in Table 1 were obtained.

○: Good water resistance

×: Poor water resistance

Ease of washing with warm water

The samples were immersed in warm water of about 40° C. for 10 seconds, rubbed with their fingers about 10 times by five examiners, and evaluated according to the following criteria. The evaluations shown in Table 1 were obtained in unanimous agreement.

○: ‧‧‧completely fall off

△: ‧‧‧about 50% ~ 90% fall off

×: ‧‧‧ not falling off

In addition, "exfoliation" means dissolution or peeling.

dryness

Five examiners measured the time from the moment after applying the sample to the glass plate until the color of the film became transparent, obtained the average value, and evaluated according to the following criteria.

○: Less than 7 minutes

△: 7 minutes or more and less than 9 minutes

×: Up to 9 minutes or more

stability

Each sample was put into a glass bottle and left to stand at 45° C. for 1 week to 1 month. The state of each sample was measured visually and by a viscosity measurement, and evaluated by five examiners according to the following criteria. The evaluations shown in Table 1 were obtained in unanimous agreement.

○:‧‧‧No change

△:‧‧‧Slight increase/decrease in viscosity

×: ‧‧‧Viscosity increase/decrease, agglomeration occurs, or gas is generated.

Breaking strength (when immersed in water)

The sample was immersed in warm water at about 40°C and pulled by hand by five examiners. The sensory evaluation of breaking strength was determined on a scale of 1 (very weak) to 5 (very strong), and the average value was evaluated according to the following criteria.

○: 3.5 or more

△: 1.5 or more and less than 3.5

×: Less than 1.5

Scalability

The sample was pulled by hand by five examiners, and the sensory evaluation of stretchability was judged on a scale of 1 (no stretching at all) to 5 (good stretching), and the average value was evaluated according to the following criteria.

○: 4.0 or more

△: 2.5 or more and less than 4.0

×: Less than 2.5

The evaluation results are shown in Table 1. Examples 1, 3 and 5 are comparative examples. Examples 2, 4 and 6-8 are examples.

From the test results, it was found that the stability of the present invention was improved compared to the comparative example using propylene carbonate as the polar solvent. In addition, an improvement in dryness was also confirmed. In addition, improvement in stretchability and improvement in breaking strength at the time of immersion in water were also confirmed in several examples.

<Curl force> prescription

According to Table 2, 2 kinds of eyelash cosmetics were prepared.

Evaluation method

False eyelashes (Girl's Secret 01, sold by Elizabeth Co., Ltd.) were prepared, and each bundle was disintegrated. Place one of the bundles with the eyelashes vertically downward, stick the roots of the false eyelashes on the upright plastic plate (refer to Figures 9 and 10), use an eyelash curler to curl them, and apply the eyelash cosmetic of the above prescription (Examples 9 to 13). 30 times. Before application and after 5 minutes of application, the angle from the bottom surface of the curl to the end of the eyelashes was measured (see FIGS. 9 and 10 ). The measurement results are shown in Table 3.

From the results of the test, it was found that the curling force of the prescription system of Example 10 was improved compared with that of the comparative example (Example 9). This phenomenon is considered to be due to the improvement in drying properties and stretchability. That is, it is considered that the film shrinks more strongly during drying, and the curling force is improved. When the ethoxydiglycol was changed from 10% (Example 10) to 0.1% (Example 11) relative to the sum of the coating agent and the polar solvent, the formulation of Example 11 did not observe the same effect as the formulation of Example 10. High curling force, but higher curling force than Example 9 (non-polar solvent) can be obtained. In addition, this effect was confirmed even when the concentration of the coating agent was low (the sum of the coating agent and the polar solvent was changed from 30% (Example 10) to 1% (Example 12)).

Claims (2)

An eyelash cosmetic, which contains polyurethane and a polar solvent, and does not substantially contain polymer dyes; wherein, the content of the polyurethane is 0.04% by mass to 20% by mass, and the content of the polar solvent is 0.04% by mass to 20% by mass. It is 0.1 mass % to 25 mass %, and the polar solvent system contains from methyl glycol, ethoxyethanol, butoxyethanol, ethoxydiglycol, butoxydiglycol, dimethoxydiglycol, diethyl alcohol At least one selected from the group consisting of oxydiglycol, hydroxyacetone and diacetone alcohol. The eyelash cosmetic according to claim 1, wherein the polar solvent contains at least one selected from the group consisting of ethoxydiglycol and diacetone alcohol.

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