JP7181646B2 - liquid crystal emulsion - Google Patents

Description

TECHNICAL FIELD The present invention relates to liquid crystal emulsions used in cleansing cosmetics.

A cleansing cosmetic for removing makeup is usually used to allow the cleansing cosmetic to blend into the skin and dissolve or disperse the makeup cosmetic remaining on the skin. Then, the cleansing cosmetic is rinsed with water or wiped off from the skin to remove makeup.

However, it is not easy to completely remove the cleansing cosmetic from the skin, and there are concerns that rinsing it off is troublesome and wiping off the skin may be a burden. Therefore, there has been proposed a gel-type liquid crystal cosmetic composition that is easily compatible with make-up cosmetics and has excellent water washability (see, for example, Patent Document 1). A cleansing cosmetic called a so-called liquid crystal type makeup remover is said to have high detergency (makeup removing power) and good water washability, and is said to have excellent properties as a cleansing cosmetic.

Cleansing cosmetics come in various properties, such as oil type, gel type, cream type, and milk (emulsion) type. A gel type is used for makeup removal, and is appropriately selected for each makeup removal performance and properties according to the purpose and application. In addition, depending on the preference of the user, the viscosity of the cleansing cosmetic and the time required for makeup removal may also be included as criteria for selecting the cleansing cosmetic.

However, the aforementioned liquid crystal type cosmetic composition is a gel type and is not suitable for other properties, and it is difficult to control the properties to suit the user's preference. For these reasons, there has been a demand for a cleansing cosmetic that is called a so-called liquid crystal type makeup remover and whose viscosity, properties, etc. can be selected according to one's preference.

Furthermore, in recent years, there are warm cleansing cosmetics that give a warm feeling when applied to the face, and are popular because of their excellent moist feeling after use, and have gained a certain reputation in the market. The warming cleansing cosmetic is used by applying an appropriate amount to the skin and massaging the skin. A feeling of warmth is caused by the reaction between a polyhydric alcohol such as glycerin, which is a main component contained in the cleansing cosmetic, and moisture to generate heat. For this reason, most of the warm cleansing cosmetics hardly contain water as a solvent.

By using polyhydric alcohol such as glycerin as the main component, the amount of oils and surfactants that lift up makeup stains is reduced, so it has a detergency (makeup removal performance) compared to general cleansing cosmetics. ) tends to be inferior to For these reasons, there is a demand for a cleansing cosmetic that is a warming cleansing cosmetic that imparts a warm sensation and has excellent detergency (make-up removing performance).

Japanese Patent No. 4969773

The present invention has been made in view of the above points, and is a warm liquid crystal emulsion used in cosmetics that give a warm feeling when used, which has good makeup-removing performance and is a cleansing cosmetic. To provide a warm-sensitive liquid crystal emulsified substance which can be arbitrarily adjusted in properties when used, can be easily adjusted in viscosity and feeling in use, and can be produced at a low cost.

10 parts by weight or more of component (A), 10 to 29.8 parts by weight of component (B), 0.2 to 5 parts by weight of component (C), and 60 to 75 parts by weight of component (D). ) component and the component (D) in a sum of 85 parts by weight or more, and the component (B) comprises a hydrophilic surfactant (b1) having an HLB value of 13 or more and the number of carbon atoms in the alkyl group. is 18 or more and has an HLB value of 6 or less, and the average HLB value in the component (B) represented by the following formula (i) is 9.0 A warming liquid crystal emulsion characterized by the following.
(A): Oil (B): Surfactant (C): Phospholipid (D): Polyhydric alcohol

A second invention relates to a warming liquid crystal emulsion according to the first invention, wherein the phospholipid of component (C) is hydrogenated lecithin or lysolecithin.

A third invention relates to the warm liquid crystal emulsion according to the first or second invention, wherein the component (A) contains a higher alcohol, and the added amount of the higher alcohol is less than 10 parts by weight.

In a fourth invention, in any one of the first to third inventions, the warm-sensitive liquid crystal emulsion contains a solvent, and 10 parts by weight or less of the solvent is added to the total weight of the warm-sensitive liquid crystal emulsion. It relates to a warming liquid crystal emulsion.

A fifth invention relates to the warm liquid crystal emulsion according to any one of the first to fourth inventions, wherein the warm liquid crystal emulsion is a cleansing cosmetic.

According to the warming liquid crystal emulsion according to the first invention, 10 parts by weight or more of component (A), 10 to 29.8 parts by weight of component (B), 0.2 to 5 parts by weight of component (C), and (D) 60 to 75 parts by weight of component (B) and component (D) in a total amount of 85 parts by weight or more, and component (B) has an HLB value of 13 or more. containing a hydrophilic surfactant (b1) and a multi-chain hydrophilic surfactant (b2) having an alkyl group with a carbon number of 18 or more and an HLB value of 6 or less, represented by the above formula (i) Since the average HLB value of the component (B) is 9.0 or less, it is a warm liquid crystal emulsion used in cosmetics that give a warm feeling when used, and has good makeup-removing performance and cleansing. It is possible to arbitrarily adjust the properties when it is used as a cosmetic for use, to easily adjust the viscosity and the feeling of use, and to make it possible to manufacture at a low cost.

According to the warming liquid crystal emulsion according to the second invention, in the first invention, since the phospholipid of the component (C) is hydrogenated lecithin or lysolecithin, the liquid crystal component is stably formed. can.

According to the warming liquid crystal emulsion according to the third invention, in the first or second invention, the component (A) contains a higher alcohol, and the amount of the higher alcohol added is less than 10 parts by weight, Viscosity, texture, etc. can be adjusted without interfering with the formation of the liquid crystal component.

According to the warm liquid crystal emulsion according to the fourth invention, in any one of the first to third inventions, the warm liquid crystal emulsion contains a solvent, and the total weight of the warm liquid crystal emulsion is Since the solvent is added in an amount of 10 parts by weight or less, it is possible to arbitrarily impart properties with high customer attraction while maintaining the properties of warmth.

According to the warming liquid crystal emulsion according to the fifth invention, in any one of the first to fourth inventions, the liquid crystal emulsion is a cleansing cosmetic, so that the user can maintain good makeup removal. It is possible to provide cleansing cosmetics having properties and textures that meet the needs of.

2 is a 250-fold enlarged photograph of the liquid crystal component of the cleansing cosmetic of Prototype Example 1. FIG. 3 is a 250-fold enlarged photograph of the liquid crystal component of the cleansing cosmetic of Prototype Example 2. FIG. 10 is a 250-fold enlarged photograph of the liquid crystal component of the cleansing cosmetic of Prototype Example 4. FIG. 10 is a 250-fold enlarged photograph of the liquid crystal component of the cleansing cosmetic of Prototype Example 5. FIG. 10 is a 250-fold enlarged photograph of the liquid crystal component of the cleansing cosmetic of Prototype Example 6. FIG. 10 is a 250-fold enlarged photograph of the liquid crystal component of the cleansing cosmetic of Prototype Example 8. FIG. 10 is a 250-fold enlarged photograph of the liquid crystal component of the cleansing cosmetic of Prototype Example 9. FIG. 10 is a 250-fold enlarged photograph of the liquid crystal component of the cleansing cosmetic of Prototype Example 23. FIG. 10 is a 250-fold enlarged photograph of the liquid crystal component of the cleansing cosmetic of Prototype Example 24. FIG. 10 is a 250-fold enlarged photograph of the liquid crystal component of the cleansing cosmetic of Prototype Example 25. FIG. 10 is a 250-fold enlarged photograph of the liquid crystal component of the cleansing cosmetic of Prototype Example 27. FIG. 10 is a 250-fold enlarged photograph of the liquid crystal component of the cleansing cosmetic of Prototype Example 28. FIG. 2 is a 250-fold enlarged photograph showing particles in an emulsion washed out in a makeup-removing experiment using the cleansing cosmetic of Prototype Example 1. FIG. 2 is a 250-fold enlarged photograph showing particles in an emulsion washed out in a makeup-removing experiment using the cleansing cosmetic of Prototype Example 2. FIG. 10 is a 250-fold enlarged photograph showing particles in an emulsion washed out in a makeup-removing experiment using the cleansing cosmetic of Prototype Example 4. FIG. 10 is a 250-fold enlarged photograph showing particles in an emulsion washed out in a makeup-removing experiment using the cleansing cosmetic of Prototype Example 5. FIG. 10 is a 250-fold enlarged photograph showing particles in an emulsion washed out in a makeup-removing experiment using the cleansing cosmetic of Prototype Example 6. FIG. 10 is a 250-fold enlarged photograph showing particles in an emulsion washed out in a makeup-removing experiment using the cleansing cosmetic of Prototype Example 8. FIG. 10 is a 250-fold enlarged photograph showing particles in an emulsion washed out in a makeup-removing experiment using the cleansing cosmetic of Prototype Example 9. FIG. 10 is a 250-fold enlarged photograph of particles in an emulsion washed out in a makeup-removing experiment using the cleansing cosmetic of Prototype Example 23. FIG. 10 is a 250-fold enlarged photograph of particles in an emulsion washed out in a makeup-removing experiment using the cleansing cosmetic of Prototype Example 24. FIG. 10 is a 250-fold enlarged photograph showing particles in an emulsion washed out in a makeup-removing experiment using the cleansing cosmetic of Prototype Example 25. FIG. 10 is a 250-fold enlarged photograph of particles in an emulsion washed out in a makeup-removing experiment using the cleansing cosmetic of Prototype Example 27. FIG. 10 is a 250-fold enlarged photograph of particles in an emulsion washed out in a makeup-removing experiment using the cleansing cosmetic of Prototype Example 28. FIG. 1 is a 1000-fold enlarged photograph of particles in an emulsion washed out in a makeup-removing experiment using the cleansing cosmetic of Prototype Example 1. FIG. 10 is a 1000-fold enlarged photograph of particles in an emulsion washed out in a makeup-removing experiment using the cleansing cosmetic of Prototype Example 2. FIG. 10 is a 1000-fold enlarged photograph of particles in an emulsion washed out in a makeup-removing experiment using the cleansing cosmetic of Prototype Example 4. FIG. 10 is a 1000-fold enlarged photograph of particles in an emulsion washed out in a makeup-removing experiment using the cleansing cosmetic of Prototype Example 5. FIG. 10 is a 1000-fold enlarged photograph of particles in an emulsion washed out in a makeup-removing experiment using the cleansing cosmetic of Prototype Example 6. FIG. 10 is a 1000-fold enlarged photograph showing particles in an emulsion washed out in a makeup-removing experiment using the cleansing cosmetic of Prototype Example 8. FIG. 10 is a 1000-fold enlarged photograph of particles in an emulsion washed out in a makeup-removing experiment using the cleansing cosmetic of Prototype Example 9. FIG. 10 is a 1000-fold enlarged photograph showing particles in an emulsion washed out in a makeup-removing experiment using the cleansing cosmetic of Prototype Example 23. FIG. 10 is a 1000-fold enlarged photograph of particles in an emulsion washed out in a makeup-removing experiment using the cleansing cosmetic of Prototype Example 24. FIG. 10 is a 1000-fold enlarged photograph of particles in an emulsion washed out in a makeup-removing experiment using the cleansing cosmetic of Prototype Example 25. FIG. 10 is a 1000-fold enlarged photograph showing particles in an emulsion washed out in a makeup-removing experiment using the cleansing cosmetic of Prototype Example 27. FIG. 10 is a 1000-fold enlarged photograph showing particles in an emulsion washed out in a makeup-removing experiment using the cleansing cosmetic of Prototype Example 28. FIG.

The liquid crystal emulsion of the present invention is used in cleansing cosmetics for removing makeup. And the liquid-crystal emulsion of this invention contains (A) component, (B) component, (C) component, and (D) component. The main component is the polyhydric alcohol of the component (D) in order to impart a warming effect during use. In addition, additives used in general cosmetics, such as moisturizers, preservatives, fragrances, coloring agents, pH adjusters, etc., are added as appropriate to cleansing cosmetics in which the liquid crystal emulsifier is used. can

Component (A) is an oil agent, and is mainly selected as a cleansing agent that is a main component of makeup remover. Examples thereof include known oils such as ethylhexyl palmitate, tri(caprylic/capric)glyceryl, triethylhexanoin, cetyl ethylhexanoate, and mineral oil. In particular, choosing an inexpensive oil solution is economical.

In addition to the above-mentioned oils, it is also possible to add oil for adjustment in order to change the feel of the cleansing cosmetic, such as smoothness and familiarity with the skin. It is selected from silicones, higher alcohols, fatty acids, etc., and is added not only for the feeling of use but also for the adjustment of viscosity. Examples thereof include known oil agents such as linear/cyclic silicones such as cyclopentasiloxane, cyclohexasiloxane and dimethicone, higher alcohols such as cetearyl alcohol, behenyl alcohol, cetanol and stearyl alcohol. Furthermore, an oil agent can be added that is a so-called concept that is preferred by consumers. These concept oil agents are preferably fragrant, naturally derived, and functional ingredients such as vitamin derivatives. For example, jojoba seed oil, Argania spinosa kernel oil, avocado oil, almond oil, macadamia nut oil Animal-derived oils such as vegetable oil, horse oil, and lanolin; hydrocarbons such as squalane, squalene, vaseline, and liquid paraffin; and oil-soluble functional ingredients such as tocopherol, retinol, and derivatives thereof.

Component (B) is a surfactant, and is selected and added in order to arbitrarily adjust how well it blends into and removes makeup and viscosity. In particular, a hydrophilic surfactant (b1) having an HLB value of 13 or more is selected to produce the liquid crystal component of the liquid crystal emulsion of the present invention. In the examples below, octyldodeceth-20 was mainly selected. In addition to octyldodeceth-20, octyldodeceth-25 and the like can be mentioned. Furthermore, by combining other surfactants (b2), the generation efficiency of the liquid crystal component can be improved, and the properties of the cleansing cosmetic can be arbitrarily controlled such as liquid, cream, gel, etc. It becomes possible. In addition, the viscosity can also be changed, and it is possible to even adjust the feeling of use.

Here, for the other surfactant (b2), a multi-chain surfactant having an alkyl group with 18 or more carbon atoms is selected. Then, the average of the hydrophilic surfactant (b1) having an HLB value of 13 or more represented by the above formula (i) and the multi-chain hydrophilic surfactant (b2) having an alkyl group having 18 or more carbon atoms By setting the HLB value to 9.0 or less, the generation of the liquid crystal component is improved, as shown in Examples described later. Examples of the multi-chain hydrophilic surfactant (b2) having an alkyl group of 18 or more carbon atoms include PEG-20 hydrogenated castor oil isostearate, PEG (polyethylene glycol)-4 glyceryl distearate, and PEG-30 water. Added castor oil, PEG-8 diisostearate, polyglyceryl-10 dicocoate, polysorbate 80, steareth-6, PEG-4 glyceryl tristearate, steareth-11, polyglyceryl-10 triisostearate, polyglyceryl-10 diisostearate , Polyglyceryl-10 tricoate oil, Polyglyceryl-10 dioleate, Polyglyceryl-10 sesquistearate, Polyglyceryl-10 tetraoleate, PEG-4 diisostearate, PEG-8 diisostearate, PEG-12 diisostearate, PEG-diisostearate 10BG, PEG-25BG diisostearate, PEG-65BG diisostearate, PEG-15BG diisostearate, PEG-4 sorbitan triisostearate, PEG-3 glyceryl triisostearate, PEG-5 glyceryl triisostearate, PEG-10 triisostearate Glyceryl, PEG-15 Glyceryl Triisostearate, PEG-20 Glyceryl Triisostearate, PEG-30 Glyceryl Triisostearate, PEG-40 Glyceryl Triisostearate, PEG-50 Glyceryl Triisostearate, PEG-5 Hydrogenated Triisostearate Castor Oil, PEG-10 Hydrogenated Castor Oil Triisostearate, PEG-15 Hydrogenated Castor Oil Triisostearate, PEG-20 Hydrogenated Castor Oil Triisostearate, PEG-30 Hydrogenated Castor Oil Triisostearate, Triisostearic Acid PEG-40 Hydrogenated Castor Oil, PEG-50 Hydrogenated Castor Oil Triisostearate, PEG-60 Hydrogenated Castor Oil Triisostearate, PEG-4 Glyceryl Tristearate, PEG-5 Glyceryl Tristearate, PEG Tristearate -6 Glyceryl, PEG-10 Glyceryl Tristearate, PEG-15 Glyceryl Tristearate, PEG-20 Glyceryl Tristearate, Polyglyceryl-10 Tristearate, PEG-4 Distearate, PEG-6 PEG Distearate- 8, known surfactants such as PEG-12 distearate. Since these components (B) are not special surfactants, they are readily available, inexpensive, and economical.

Component (C) is a phospholipid, which is a factor for liquid crystal formation. Hydrogenated lecithin was mainly selected in the examples described later. Hydrogenated lecithin facilitates the formation of uniform liquid crystals with particularly good liquid crystal formation. Besides hydrogenated lecithin, known phospholipids such as lysolecithin can be selected.

Component (D) is a polyhydric alcohol, which contributes to the stabilization of the system and imparts a warming effect during use. The polyhydric alcohol reacts with moisture to generate heat and give a feeling of warmth to the user, and since it is a moisturizing component, it contributes to a moist feeling after use. Adding a large amount of polyhydric alcohol can improve the warming effect, and the amount to be added can be changed according to the desired effect. Polyhydric alcohols include known polyhydric alcohols such as glycerin, butylene glycol (BG), polyethylene glycol, isopentyldiol, propanediol, diglycerin, propylene glycol, dipropylene glycol, pentaerythritol, sorbitol, sorbitan, maltitol, and trehalose. can be selected from alcohols; In particular, since glycerin is inexpensive and has a good exothermic reaction, it is widely used in so-called warm cleansing and is preferably used.

The liquid crystal emulsion of the present invention contains 10 parts by weight or more of component (A), 10 to 29.8 parts by weight of component (B), 0.2 to 5 parts by weight of component (C), and 60 parts by weight of component (D). It contains up to 75 parts by weight. Also, water as a solvent can be contained to such an extent that the warming effect is not impaired. Since the exothermic reaction of the polyhydric alcohol occurs only once, it is conceivable that the polyhydric alcohol is contained in an amount of 10 parts by weight or less with respect to the total amount of the warm liquid crystal emulsion that does not cause an exothermic reaction. The solvent is considered to be added as appropriate when imparting a water-soluble component having properties such as an odor that is highly attractive to customers.

If the amount of component (A) added is too large, the liquid crystal component may not be uniformly dispersed, or the components may not be mixed, that is, may separate. When the blending amount of component (A) increases, the viscosity decreases and exhibits liquid properties. Addition of higher alcohol or silicone increases the viscosity and tends to give a hard texture. If 10 parts by weight or more of the higher alcohol is added as shown in the examples below, the liquid crystal component may not be formed or the components may separate.

If the amount of the component (B) surfactant is too large, the load on the skin will be increased, and if it is too small, the make-up removal tends to be poor. If the amount of component (C) is too small, no liquid crystal component will be generated. Although component (C) can be added in a large amount, there is no particular problem, but since the amount of the liquid crystal component produced does not change significantly from about 2 parts by weight, the upper limit of the amount added was set to 5 parts by weight. If the amount of the polyhydric alcohol of component (D) is too small, the system will not be stable and separation will occur. Conversely, if it is too much, there is a risk of solidification.

Also, the sum of the blending amounts of the component (B) and the component (D) is set to 85 parts by weight or more. If the amount of component (A) is relatively too large, the formation of liquid crystals will not be favorable, or the system will become unstable and separation will occur.

The liquid crystal emulsion of the present invention is obtained by stirring while heating the oil phase of components (A), (B) and (C) at 70 to 80° C., and adding component (D) and each additive or solvent as appropriate. It can be obtained by adding, heating and stirring at 70 to 80° C., mixing and cooling. In addition, it is considered that the liquid crystal emulsion of the present invention can also be obtained by mixing each component at once and heating and stirring. Since the production method does not require any special steps, the liquid crystal emulsion of the present invention can be easily obtained and is economically efficient.

[Materials used]
The inventor used the following materials to prepare a cleansing cosmetic using the liquid crystal emulsion of the prototype example.

<(A) Component>
・ Ethylhexyl palmitate (A1): Nisshin Oillio Group Co., Ltd., "Salacos P-8" (registered trademark)
・ Tri (caprylic / capric) glyceryl (A2): Kao Corporation, "Coconard MT" (registered trademark)

<(B) Component>
・ Octyldodeceth-20 (B1): Japan Emulsion Co., Ltd., “EMALEX OD-20” (registered trademark), HLB value 13, alkyl group carbon number 20, multi-chain type ・ PEG-8 diisostearate (B2): Japan Emulsion Co., Ltd., "EMALEX 400di-IS", HLB value 6, alkyl group carbon number 18, multi-chain type PEG-4 diisostearate (B3): Japan Emulsion Co., Ltd., "EMALEX GWS-204", HLB Value 4, carbon number of alkyl group 18, polyglyceryl diisostearate-6 (B4): manufactured by Nippon Emulsion Co., Ltd., "EMALEX DISG-6", HLB value 8, carbon number of alkyl group 18, multichain type・ Polyglyceryl triisostearate-10 (B5): “EMALEX TISG-10” manufactured by Nippon Emulsion Co., Ltd., HLB value 8, alkyl group carbon number 18, multi-chain type

<(C) Component>
・ Hydrogenated lecithin (C1): manufactured by Nikko Chemicals Co., Ltd., "NIKKOL Resinol S-10" (registered trademark)

<(D) Component>
・ Glycerin (D1): Sakamoto Yakuhin Kogyo Co., Ltd., “Concentrated glycerin for cosmetics”
・ PEG-8 (D2): manufactured by Toho Chemical Industry Co., Ltd., "PEG-400"

<Additive>
The inventors appropriately added the following additives in preparation of cleansing cosmetics using the liquid crystal emulsions of the prototype examples.
・ Preservative (phenoxyethanol): "Phenoxyethanol S" manufactured by Yokkaichi Synthetic Co., Ltd.

[Preparation of cleansing cosmetic of prototype example]
Using the above materials, the inventor obtained the cleansing cosmetics of the following prototype examples. The average HLB value of each prototype was calculated from the above formula (i).

[Prototype example 1]
7 parts by weight of ethylhexyl palmitate (A1) as components (A) and 5 parts by weight of tri(caprylic/capric)glyceryl (A2), totaling 12 parts by weight, and 3 parts by weight of octyldodeceth-20 (B1) as component (B) Part, PEG-8 diisostearate (B2) 9 parts by weight, a total of 12 parts by weight, and hydrogenated lecithin (C1) 1.5 parts by weight as component (C) were heated at 80 ° C. and stirred, 60.4 parts by weight of glycerin (D1), 14 parts by weight of PEG-8 (D2) as components D), and 0.1 part by weight of phenoxyethanol as a preservative were heated at 80° C. and stirred, mixed and cooled. Then, a cleansing cosmetic of Prototype Example 1 was obtained. The average HLB value of Prototype Example 1 is 7.75.

[Prototype example 2]
A cleansing cosmetic of Prototype Example 2 was obtained in the same manner as in Prototype Example 1 except that the components (B) were octyldodeceth-20 (B1) 4 parts by weight and diisostearate PEG-8 (B2) 8 parts by weight. The average HLB value of Prototype Example 2 is 8.33.

[Prototype Example 3]
A cleansing cosmetic of Prototype Example 3 was obtained in the same manner as in Prototype Example 1 except that the components (B) were octyldodeceth-20 (B1) 6 parts by weight and PEG-8 diisostearate (B2) 6 parts by weight. The average HLB value of Prototype Example 3 is 9.50.

[Prototype example 4]
Same as Prototype Example 1, except that the component (B) was octyldodeceth-20 (B1) 5 parts by weight, the diisostearate PEG-8 (B2) was 7 parts by weight, and the component (D) was glycerin (D1) 74.4 parts by weight. In the same manner, a cleansing cosmetic of Prototype Example 4 was obtained. The average HLB value of Prototype Example 4 is 8.92.

[Prototype Example 5]
A cleansing cosmetic of Prototype Example 5 was obtained in the same manner as in Prototype Example 4 except that 65.4 parts by weight of glycerin (D1) and 9 parts by weight of PEG-8 (D2) were used as the component (D). The average HLB value of Prototype Example 5 is 8.92.

[Prototype Example 6]
A cleansing cosmetic of Prototype Example 6 was obtained in the same manner as in Prototype Example 4 except that 60.4 parts by weight of glycerin (D1) and 14 parts by weight of PEG-8 (D2) were used as the component (D). The average HLB value of Prototype Example 6 is 8.92.

[Prototype Example 7]
Same as Prototype Example 1, except that the component (B) was 7 parts by weight of octyldodeceth-20 (B1) and 9 parts by weight of PEG-8 diisostearate (B2), and the component (D) was 70.4 parts by weight of glycerin (D1). In the same manner, a cleansing cosmetic of Prototype Example 7 was obtained. The average HLB value of Prototype Example 7 is 9.06.

[Prototype Example 8]
Same as Prototype Example 8 except that the component (B) was 9 parts by weight of octyldodeceth-20 (B1) and 12 parts by weight of PEG-8 diisostearate (B2), and the component (D) was 65.4 parts by weight of glycerin (D1). In the same manner, a cleansing cosmetic of Prototype Example 8 was obtained. The average HLB value of Prototype Example 8 is 9.00.

[Prototype Example 9]
Same as Prototype Example 7 except that the component (B) was 11 parts by weight of octyldodeceth-20 (B1) and 15 parts by weight of PEG-8 diisostearate (B2), and the component (D) was 60.4 parts by weight of glycerin (D1). In the same manner, a cleansing cosmetic of Prototype Example 9 was obtained. The average HLB value of Prototype Example 9 is 8.96.

[Prototype Example 10]
Same as Prototype Example 7 except that the component (B) was octyldodeceth-20 (B1) 13 parts by weight, the diisostearate PEG-8 (B2) was 18 parts by weight, and the component (D) was glycerin (D1) 55.4 parts by weight. A cleansing cosmetic of Prototype Example 10 was obtained in the same manner. The average HLB value of Prototype Example 10 is 8.94.

[Prototype Example 11]
Component (A) is ethylhexyl palmitate (A1) 9 parts by weight, tri(caprylic/capric) glyceryl (A2) is 7 parts by weight, and component (B) is octyldodeceth-20 (B1) 5 parts by weight, PEG diisostearate. -8 (B2) 7 parts by weight, the cleansing cosmetic of Prototype Example 11 was obtained in the same manner as in Prototype Example 1 except that the component (D) was glycerin (D1) 70.4 parts by weight. The average HLB value of Prototype Example 11 is 8.92.

[Prototype Example 12]
(A) 12 parts by weight of ethylhexyl palmitate (A1), 9 parts by weight of tri(caprylic/capric)glyceryl (A2), and (D) 65.4 parts by weight of glycerin (D1) The cleansing cosmetic of Prototype Example 12 was obtained in the same manner as in Prototype Example 11. The average HLB value of Prototype Example 12 is 8.92.

[Prototype Example 13]
(A) 15 parts by weight of ethylhexyl palmitate (A1), 11 parts by weight of tri(caprylic/capric) glyceryl (A2), and (D) 60.4 parts by weight of glycerin (D1) The cleansing cosmetic of Prototype Example 13 was obtained in the same manner as in Prototype Example 11. The average HLB value of Prototype Example 14 is 8.92.

[Prototype Example 14]
(A) 18 parts by weight of ethylhexyl palmitate (A1), 13 parts by weight of tri(caprylic/capric)glyceryl (A2), and 55.4 parts by weight of glycerin (D1) as component (D) The cleansing cosmetic of Prototype Example 14 was obtained in the same manner as in Prototype Example 11. The average HLB value of Prototype Example 14 is 8.92.

[Prototype Example 15]
Component (A) is ethylhexyl palmitate (A1) 9 parts by weight, tri(caprylic/capric) glyceryl (A2) is 6 parts by weight, and component (B) is octyldodeceth-20 (B1) 10 parts by weight, PEG diisostearate. -8 (B2) was 13 parts by weight, and the cleansing cosmetic of Prototype Example 15 was obtained in the same manner as in Prototype Example 1 except that the component (D) was glycerin (D1) 60.4 parts by weight. The average HLB value of Prototype Example 15 is 9.04.

[Prototype Example 16]
Component (A) is ethylhexyl palmitate (A1) 10 parts by weight, tri(caprylic/capric)glyceryl (A2) is 7 parts by weight, and component (B) is octyldodeceth-20 (B1) 9 parts by weight, PEG diisostearate. A cleansing cosmetic composition of Prototype Example 16 was obtained in the same manner as in Prototype Example 15 except that 8 (B2) was 12 parts by weight. The average HLB value of Prototype Example 16 is 9.00.

[Prototype Example 17]
Component (A) is 13 parts by weight of ethylhexyl palmitate (A1) and 9 parts by weight of tri(caprylic/capric)glyceryl (A2), and component (B) is 7 parts by weight of octyldodeceth-20 (B1) and PEG diisostearate. A cleansing cosmetic of Prototype Example 17 was obtained in the same manner as in Prototype Example 15 except that -8 (B2) was 9 parts by weight. The average HLB value of Prototype Example 17 is 9.06.

[Prototype Example 18]
Component (A) is ethylhexyl palmitate (A1) 14 parts by weight, tri(caprylic/capric) glyceryl (A2) is 10 parts by weight, and component (B) is octyldodeceth-20 (B1) 6 parts by weight, PEG diisostearate. A cleansing cosmetic of Prototype Example 18 was obtained in the same manner as in Prototype Example 15 except that -8 (B2) was 8 parts by weight. The average HLB value of Prototype Example 18 is 9.00.

[Prototype Example 19]
Component (A) is ethylhexyl palmitate (A1) 15 parts by weight, tri(caprylic/capric) glyceryl (A2) is 11 parts by weight, and component (B) is octyldodeceth-20 (B1) 4 parts by weight, PEG diisostearate. -8 (B2) was 8 parts by weight, and the cleansing cosmetic of Prototype Example 19 was obtained in the same manner as in Prototype Example 1 except that the component (D) was glycerin (D1) 60.4 parts by weight. The average HLB value of Prototype Example 19 is 8.33.

[Prototype example 20]
The cleansing cosmetic of Prototype Example 20 was obtained in the same manner as in Prototype Example 19 except that the components (B) were octyldodeceth-20 (B1) 3 parts by weight and PEG-8 diisostearate (B2) 9 parts by weight. The average HLB value of Prototype Example 20 is 7.75.

[Prototype Example 21]
A cleansing cosmetic of Prototype Example 21 was obtained in the same manner as in Prototype Example 19 except that the components (B) were 2 parts by weight of octyldodeceth-20 (B1) and 10 parts by weight of PEG-8 diisostearate (B2). The average HLB value of Prototype Example 21 is 7.17.

[Prototype Example 22]
The cleansing cosmetic of Prototype Example 22 was obtained in the same manner as in Prototype Example 19 except that the components (B) were 1 part by weight of octyldodeceth-20 (B1) and 11 parts by weight of PEG-8 diisostearate (B2). The average HLB value of Prototype Example 22 is 6.58.

[Prototype Example 23]
Same as Prototype Example 1 except that the component (B) was 11 parts by weight of octyldodeceth-20 (B1) and 15 parts by weight of PEG-8 diisostearate (B2), and the component (D) was 60.4 parts by weight of glycerin (D1). In the same manner, a cleansing cosmetic of Prototype Example 23 was obtained. The average HLB value of Prototype Example 23 is 8.96.

[Prototype Example 24]
A cleansing cosmetic of Prototype Example 24 was obtained in the same manner as in Prototype Example 23 except that the components (B) were 13 parts by weight of octyldodeceth-20 (B1) and 13 parts by weight of PEG-4 diisostearate (B3). The average HLB value of Prototype Example 24 is 8.50.

[Prototype Example 25]
The cleansing cosmetic of Prototype Example 25 was obtained in the same manner as in Prototype Example 23 except that the components (B) were octyldodeceth-20 (B1) 5 parts by weight and polyglyceryl diisostearate-6 (B4) 21 parts by weight. The average HLB value of Prototype Example 25 is 8.96.

[Prototype Example 26]
The cleansing cosmetic of Prototype Example 27 was obtained in the same manner as in Prototype Example 23 except that the components (B) were octyldodeceth-20 (B1) 5 parts by weight and polyglyceryl triisostearate-10 (B5) 21 parts by weight. The average HLB value of Prototype Example 26 is 8.96.

[Prototype Example 27]
A cleansing cosmetic of Prototype Example 27 was obtained in the same manner as in Prototype Example 1 except that the components (B) were octyldodeceth-20 (B1) 4 parts by weight and diisostearate PEG-8 (B2) 8 parts by weight. The average HLB value of Prototype Example 27 is 8.33.

[Prototype Example 28]
A cleansing cosmetic of Prototype Example 28 was obtained in the same manner as in Prototype Example 27 except that the components (B) were octyldodeceth-20 (B1) 5 parts by weight and PEG-4 diisostearate (B3) 7 parts by weight. The average HLB value of Prototype Example 28 is 7.75.

[Prototype Example 29]
The cleansing cosmetic of Prototype Example 29 was obtained in the same manner as in Prototype Example 27 except that the components (B) were octyldodeceth-20 (B1) 2 parts by weight and polyglyceryl diisostearate-6 (B4) 10 parts by weight. The average HLB value of Prototype Example 29 is 8.83.

[Prototype Example 30]
The cleansing cosmetic of Prototype Example 30 was obtained in the same manner as in Prototype Example 27 except that the components (B) were 2 parts by weight of octyldodeceth-20 (B1) and 10 parts by weight of polyglyceryl triisostearate (B5). The average HLB value of Prototype Example 30 is 8.83.

Tables 1 to 8 summarize the types and amounts of components (A) to (D) added, the amount of preservative added, and the average HLB value of component (B) in each prototype.

[Evaluation of properties of cleansing cosmetics and generation of liquid crystal components]
The properties of the cleansing cosmetic of each prototype were visually evaluated, and the presence or absence of a liquid crystal component was evaluated. The properties of each prototype example were classified into two, ie, "gel" and "cream", and those in which each component was separated without being mixed was marked with "x" in the property column. "◎" indicates that a large amount of liquid crystal component is generated uniformly, "○" indicates that the liquid crystal component is generated but unevenly, "△" indicates that even a small amount of liquid crystal component is generated, and liquid crystal Those in which the generation of the component could not be confirmed were evaluated as "x". 1 to 12 show 250-fold enlarged photographs of the cleansing cosmetics of each prototype. Photographs of prototypes in which liquid crystal components were not generated are omitted.

Next, the viscosity of the cleansing cosmetic of each prototype is measured in accordance with JIS Z 8803 (2011) using a TVB-15H viscometer (manufactured by Toki Sangyo Co., Ltd.) at a temperature of 25 ° C. and a humidity of 50%. Measured under conditions.

[Evaluation of makeup removing performance]
Furthermore, a makeup-removing experiment was conducted using the cleansing cosmetics of each trial example in which a liquid crystal component was generated, and the makeup-removing performance was evaluated. 0.01 g of foundation is spread over a 2 cm square frame on the inner side of the forearm, and 0.03 g of the cleansing cosmetic to be evaluated is placed on the spread spread foundation, and the belly of the fingertips is applied to the skin. At this time, the time required for the foundation and cleansing cosmetics to blend in and the resistance of the fingertips to become light was measured and used as the massage time. After that, the skin was slowly rinsed with about 3 ml of water while massaging, and the rinsed emulsion (water) was sampled and observed for particle size. It is shown in the table as massage time.

In addition, the particles in the emulsion washed out when the makeup was washed away with the cleansing cosmetic were confirmed, and the size and amount of the particles were evaluated. It can be said that a cleansing cosmetic with a large amount of particles that are washed out is more effective in removing makeup. Regarding the amount of particles, in the 250-fold enlarged photographs of the particles in the emulsion shown in FIGS. A sample with a large particle size and a small amount of dispersed particles was marked with "Δ", and the interval between them was marked with "○". The particle size of the particles in the emulsion shown in the 1000-fold enlarged photographs of FIGS. "Fair" and those with different particle sizes were evaluated as "irregular".

Tables 9 to 15 show the properties of the cleansing cosmetics of each prototype, evaluation of the presence or absence of liquid crystal components, viscosity, massage time, particle size and amount. In the table, the drawing numbers of the enlarged photographs of the liquid crystal component and the enlarged photographs (1000 times and 250 times) of the washed out particles are shown.

[Results and discussion]
As shown in Tables 1 to 15 and FIGS. 1 to 36, the prototype examples that have a gel-like or cream-like property and contain a large amount of liquid crystal components are cleansing cosmetics with good makeup-removing performance. I was able to As an overall tendency, the system was not stable and separated in trial production examples in which the average HLB value of component (B) was greater than 9.0. Further, it was found that a surfactant having an HLB value of more than 6 is not suitable as a combination of surfactants (b1).

Furthermore, even if the average HLB value is 9.0 or less, the compounding ratio of the component (A) is large and the compounding ratio of the component (B) and the component (D) is relatively small. It was found that the system was not stable and separated. More specifically, when the total amount of components (B) and (D) is 85 parts by weight or more, liquid crystals are stably formed and the system as a cosmetic is stabilized.

According to Prototype Examples 1 to 3 shown in Tables 1 and 9 and FIGS. Among the modified examples, the liquid crystal component was not formed in Prototype Example 3, in which the average HLB was greater than 9.0, while in Prototype Examples 1 and 2, the liquid crystal component was formed satisfactorily. became. Both Prototype Examples 1 and 2 have good makeup-removing properties, indicating that it is possible to control the properties preferred by consumers.

According to Prototype Examples 4 to 6 shown in Tables 2 and 10 and FIGS. In the modified example, it was shown that by including 60 parts by weight or more of glycerin as component (D), the system was stabilized and separation did not occur.

According to Prototype Examples 7 to 10 shown in Tables 3, 11 and FIGS. In the modified example, the result was that prototype example 7, in which the average HLB value was greater than 9.0, and prototype example 10, which contained less component (D), were separated. In addition, Prototype Example 10 was unsuitable because of its weak warming effect.

According to Prototype Examples 11 to 22 shown in Tables 4 to 6, 12, and 13, the amount of component (A) is large, and the amount of components (B) to (D) is relatively small. In other cases, even if the average HLB value was 9.0 or less, the system was unstable and resulted in separation.

According to Prototype Examples 23-26 shown in Tables 7 and 14 and FIGS. In an example where the amount is changed, in combination with octyldodeceth-20 (B1), which is a hydrophilic surfactant (b1) having an HLB value of 13 or more, a multi-chain alkyl group having 18 or more carbon atoms and the HLB value is 6 or less, the liquid crystal component is well formed. In Prototype Example 25, although the liquid crystal component was formed, the amount thereof was small, resulting in poor makeup-removing performance.

According to Prototype Examples 27 to 30 shown in Tables 8 and 15 and FIGS. , In the example where the (A) component and (D) component are the same, and the combination and blending amount of the (B) component are changed, the HLB value is 13 or more as in the previous prototype examples 23 to 26. Hydrophilic surfactant (b2) in combination with octyldodeceth-20 (B1), which is a hydrophilic surfactant (b1), is a multi-chain alkyl group having 18 or more carbon atoms and an HLB value of 6 or less ) was found to favorably form a liquid crystal component.

Comparing prototypes in which liquid crystal components are formed, even if the properties are the same, the viscosity and the time required for makeup removal are different. It was also shown that it is possible to adjust the properties, texture, and even massage time.

As described above, as shown in Tables 9 to 15, good makeup-removing performance was confirmed in the cleansing cosmetics according to the prototype examples in which liquid crystals were generated. In addition, there is a tendency that the more the liquid crystal component is, the higher the makeup removal performance is, and it was shown that the liquid crystal component contributes to the good makeup removal. (D) Since it has a sufficient warming action by containing at least 60 parts by weight of the polyhydric alcohol of the component, these make it possible to use the so-called warming liquid crystal type cleansing cosmetic containing the warming liquid crystal emulsion according to the present invention. It is possible to obtain a warming liquid crystal emulsion that can arbitrarily control the properties, texture, etc. of cleansing cosmetics while ensuring good makeup-removing performance, and can be adjusted according to user's taste and needs. was shown.

The warm-sensitive liquid crystal emulsion of the present invention has a warm-sensing action that gives a warm feeling when used, and has good makeup-removing performance. Furthermore, the properties of the cleansing cosmetic can be arbitrarily selected, and the texture and makeup removal speed can be adjusted, so the cleansing cosmetic can meet the needs of the consumer. can be provided. INDUSTRIAL APPLICABILITY The warm liquid crystal emulsion of the present invention can be produced without using a special component and without complicated steps, and is therefore inexpensive and economical.

Claims (5)

10 parts by weight or more of component (A), 10 to 29.8 parts by weight of component (B), 0.2 to 5 parts by weight of component (C), and 60 to 75 parts by weight of component (D),
The sum of the blending amounts of the component (B) and the component (D) is 85 parts by weight or more,
The component (B) consists of a hydrophilic surfactant (b1) having an HLB value of 13 or more and a multi-chain hydrophilic surfactant having an alkyl group of 18 or more carbon atoms and an HLB value of 6 or less ( b2), wherein the average HLB value of the component (B) represented by the following formula (i) is 9.0 or less.
(A): Oil (B): Surfactant (C): Phospholipid (D): Polyhydric alcohol

2. The warming liquid crystal emulsion according to claim 1, wherein the phospholipid of component (C) is hydrogenated lecithin or lysolecithin. 3. The warm liquid crystal emulsion according to claim 1, wherein the component (A) contains a higher alcohol, and the added amount of the higher alcohol is less than 10 parts by weight. 4. The warm liquid crystal according to any one of claims 1 to 3 , wherein the warm liquid crystal emulsion contains a solvent, and the solvent is added in an amount of 10 parts by weight or less based on the total weight of the warm liquid crystal emulsion. emulsion. The warm liquid crystal emulsion according to any one of claims 1 to 3, wherein the warm liquid crystal emulsion is a cleansing cosmetic.

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