Powders and Cosmetics

Abstract

Elastic modulus is 1×10 5 ~5×10 10 N / m 2 On the surface of the elastic powder, N ε -Lauroyl lysine and N ε The present invention provides a powder in which one or more components of octanoyl lysine are present.

Description

Technical Field

[0001] The present invention relates to a powder for improving touch and a cosmetic containing the powder.

Background Art

[0002] Conventionally, for the purpose of improving the touch and slipperiness during application, spherical polymer powders such as nylon powder (see, for example, Patent No. 2653990) and acrylic powder (see, for example, Patent No. 3027008) are blended into cosmetics. In particular, although spherical nylon powder has a good unique touch and slipperiness during application due to the rolling feeling peculiar to spheres, there are problems such as generating a squeak derived from the synthetic polymer resin on the skin and being unable to impart a moist feeling. On the other hand, ε Techniques such as blending N-mono long-chain acyl basic amino acids typified by N-lauroyl lysine into cosmetics as cosmetic powders to impart a unique moist feeling have been devised (see Japanese Patent Application Laid-Open No. 61-10503). However, although this N-mono long-chain acyl basic amino acid has excellent elongation on the skin during application, there is a problem that the touch and slipperiness during application due to the rolling feeling like spherical nylon powder are poor. N ε N-lauroyl lysine may be used as a surface treatment agent to improve the touch of talc (Japanese Patent Application Laid-Open No. 7-252113). However, in order to produce powders such as talc surface-treated with N-lauroyl lysine having high water repellency, adhesiveness, and transparency, N-lauroyl lysine must be dissolved in a strong alkali or strong acid once and precipitated on the powder surface. Industrially, powders that can be surface-treated with N-lauroyl lysine were limited to powders having acid- and alkali-resistance, special shapes, and specific functional groups such as talc and mica. Powders such as corn starch could not be surface-treated with N-lauroyl lysine by such a method. ε -lauroyl lysine ε -lauroyl lysine ε -lauroyl lysine ε -lauroyl lysine

Summary of the Invention

[0003] An object of the present invention is to provide a powder excellent in feel and slipperiness during application, capable of imparting a moist feeling, and free from squeaking, and a cosmetic containing the powder.

[0004] As a result of intensive studies, the present inventors found that by pulverizing and mixing corn starch powder with one or two of N ε -lauroyl lysine or N ε -octanoyl lysine under specific conditions, N ε -lauroyl lysine or N ε -octanoyl lysine, which is a non-elastic powder, is present on the surface of corn starch, which is an elastic powder, and a powder capable of solving the above problems can be obtained. Based on this fact, the present invention has been completed. That is, the present invention provides the following powders and cosmetics. [1] A powder in which one or more components of N 5 ~5×10 10 N / m 2 is present on the surface of an elastic powder having an elastic modulus of ε -lauroyl lysine and N ε -octanoyl lysine. [2] The powder according to [1], wherein the elastic modulus of the elastic powder is 1×10 6 ~1×10 10 N / m 2 . [3] The powder according to [1], wherein the elastic modulus of the elastic powder is 1×10 7 ~5×10 8 N / m 2 . [4] The powder according to [1], wherein the elastic modulus of the elastic powder is 1×10 7 ~3×10 8 N / m 2 . [5] The powder according to any one of [1] to [4], wherein the ratio of the total mass of the one or more components to the mass of the elastic powder is 1:9 to 4:6. [6] The powder according to any one of [1] to [5], having an average particle diameter of 5 to 25 μm and a particle diameter at a cumulative frequency of 90% of all particles of 35 μm or less. [7] The powder according to any one of [1] to [6], having an average particle diameter of 10 to 20 μm and a particle diameter at a cumulative frequency of 90% of all particles of 15 to 30 μm. [8] The powder according to any one of [1] to [7], wherein the elastic powder is corn starch. [9] The powder according to any one of [1] to [8], which is spherical.

[10] A cosmetic containing the powder according to any one of [1] to [9].

[11] An elastic modulus of 1 × 10 5 ~5 × 10 10 N / m 2 An elastic powder, and N ε -lauroyllisine and N ε A powder obtained by pulverizing and mixing one or more of -octanoyllisine.

[12] The powder according to

[11] , having an average particle diameter of 5 to 25 μm and a particle diameter at a cumulative frequency of 90% of all particles of 35 μm or less.

Brief Description of the Drawings

[0005]

Figure 1

Figure 2

Modes for Carrying Out the Invention

[0006] The powder of the present invention is a powder in which one or more components of N 5 ~5 × 10 10 N / m 2 are present on the surface of an elastic powder having an elastic modulus of 1 × 10 ε -lauroyllisine and N ε -octanoyllisine. Here, the presence of the one or more components on the surface of the elastic powder means that the one or more components may be present, such as being adhered, on at least a part of the surface of the elastic powder, and the mode thereof is not particularly limited. The elastic powder used in the present invention has an elastic modulus of 1 × 10 5 ~5 × 10 10 N / m2 and preferably 1×10 6 ~1×10 10 N / m 2 and more preferably 1×10 7 ~5×10 8 N / m 2 and even more preferably 1×10 7 ~3×10 8 N / m 2 is. Such elastic powder is N ε -lauryll lysine and N εBy pulverizing and mixing one or more components of octanoyl lysine under specific conditions, a powder in which the one or more components are present on the surface of an elastic powder can be prepared. Examples of the elastic powder include corn starch (maize starch), rice starch, potato starch, tapioca starch, wheat flour, barley flour, rye flour, pregelatinized starch, partially pregelatinized starch, polymethyl methacrylate, methyl methacrylate cross polymer, polyacrylic acid, nylon-6, nylon-12, nylon-11, polyurethane, polyethylene, polypropylene, polystyrene, silicone resin, (vinyldimethylsilicone / methylsilsesquioxane) cross polymer, sodium carboxymethyl starch, carmellose, sodium carmellose, calcium carmellose, croscarmellose sodium, crospovidone, low-substituted hydroxypropyl cellulose, methyl cellulose, ethyl cellulose, hypromellose, hydroxypropyl cellulose, hydroxypropyl methylcellulose phthalate, hydroxypropyl methylcellulose acetate succinate, carboxymethyl ethyl cellulose, sodium carboxymethyl cellulose, hydroxyethyl cellulose, cellulose acetate phthalate, crystalline cellulose, polyethylene glycol, polyvinyl alcohol, polyvinyl pyrrolidone, polyvinyl acetal diethylaminoacetate, aminoalkyl methacrylate copolymer E, aminoalkyl methacrylate copolymer RS, methacrylic acid copolymer L, methacrylic acid copolymer LD, methacrylic acid copolymer S, carboxyvinyl polymer, gum arabic, polystyrene / butadiene rubber, natural rubber, sodium alginate, propylene glycol alginate, agar, gelatin, tragacanth, xanthan gum, guar gum, polyarginine, polylysine, polyglutamic acid, ceresin, microcrystalline wax, porous silica, silica, etc. The elastic powder is preferably corn starch. These elastic powders may be used alone or in combination of two or more. The ratio of the total mass of the above-mentioned one or more components to the mass of the elastic powder is preferably 1:9 to 6:4, more preferably 1:9 to 4:6. By setting the ratio within such a range, on the surface of the elastic powder, N ε -lauroyl lysine and N ε -octanoyl lysine powder containing one or more components can be efficiently prepared.

[0007] The powder of the present invention can be prepared, for example, by using an alumina ball with a diameter of 0.5 to 5 cm in a ball mill to grind and mix the elastic powder and the above-mentioned one or more components. The average particle size of the powder of the present invention is preferably 5 to 25 μm, more preferably 10 to 20 μm. Also, the particle size of 90% of the cumulative frequency of all particles of the powder of the present invention is preferably 35 μm or less, more preferably 15 to 30 μm. By adjusting the particle size within these ranges, the feel on the skin can be made excellent. The average particle size and the particle size of 90% of the cumulative frequency of all particles can be measured using a laser diffraction / scattering particle size distribution measuring device. The powder of the present invention is preferably spherical. Here, "spherical" does not necessarily mean only a perfect sphere, but means those in which the cross-sectional shape of the particle is surrounded by a curved surface such as a circle, an ellipse, a nearly circle, or a nearly ellipse.

[0008] The cosmetic of the present invention contains a powder containing one or more components of N 5 ~5×10 10 N / m 2 on the surface of an elastic powder having an elastic modulus of ε -lauroyl lysine and N ε -octanoyl lysine. In the cosmetic of the present invention, components usually used in cosmetics, such as powder, pigment, oil agent, ionic surfactant, nonionic surfactant, humectant, antioxidant, thickener, film-forming agent, organic solvent, preservative, chelating agent, fragrance, etc., can be appropriately blended within a range that does not impair the effects of the present invention. The dosage form of the cosmetic of the present invention is arbitrary and may be any dosage form such as a solution system, solubilization system, emulsion system, powder dispersion system, etc. Its uses can be for skin cosmetics such as lotions, milks, creams, packs, etc., hair cosmetics such as shampoos, rinses, hair creams, hair sets, etc., and makeup cosmetics such as foundations, lipsticks, eyeshadows, etc. The pH of the cosmetic of the present invention is not particularly limited to a specific range, but is generally 4.5 to 7. The pH of the cosmetic of the present invention may be adjusted by adding a pH adjuster. The pH adjuster is not particularly limited, and examples thereof include lactic acid, citric acid, glycolic acid, succinic acid, tartaric acid, potassium carbonate, sodium hydrogen carbonate, ammonium hydrogen carbonate, sodium hydroxide, potassium hydroxide, triethanolamine, monoethanolamine, etc. These pH adjusters can be used alone or in combination of two or more. Next, the present invention will be described by way of examples and comparative examples, but the present invention is not limited thereto.

Examples

[0009] <Example 1> N ε 4 g of N-lauroyl lysine (Ajinomoto Co., Inc., Amihope (registered trademark) LL) and 16 g of corn starch (Nippon Shokuhin Kako Co., Ltd., Corn Starch W) were weighed into an alumina ball mill container with a volume of 1 L. 660 g of alumina balls with a diameter of 2.0 cm and 600 g of alumina balls with a diameter of 1.0 cm were put into this container, and pulverized and mixed at 100 rpm for 15 hours to obtain spherical powder with N-lauroyl lysine attached to the surface. ε -lauroyl lysine adhered to obtain spherical powder. Confirmation that N-lauroyl lysine adhered to the surface was visually observed with an optical microscope (manufactured by HIROX, RH-2000 digital microscope), ε and it was confirmed that N-lauroyl lysine adhered to the surface of the spherical particles peculiar to corn starch (Figs. 1 and 2). The elastic modulus of the corn starch was 2.9×10 ε N / m 8 N / m 2It was. The elastic modulus of the elastic powder was calculated by the following formula from the particle diameter measured one by one with an optical microscope, the cross-sectional area calculated from the particle diameter assuming the particle cross-section as a circle, the test force calculated by a micro compression tester (manufactured by Shimadzu Corporation, MCT-510), and the compression displacement (deformation amount). The value of the elastic modulus is the average value of n = 5. Elastic modulus = σ÷ε=(P÷A)÷(λ÷L) σ: Vertical stress P: Test force A: Particle cross-sectional area ε: Strain λ: Compression displacement (deformation amount) L: Particle diameter Also, when the arithmetic mean particle diameter was measured by the dry method using a laser diffraction / scattering particle size distribution measuring device (manufactured by Horiba, Ltd., LA-950), the average particle diameter was 12 μm, and the particle diameter at a cumulative frequency of 90% of all particles was 20 μm. The arithmetic mean particle diameter is expressed by the following formula. Arithmetic mean particle diameter (μm) = Σ{q(J)×X(J)}÷Σ{q(J)} J: Particle diameter division number q(J): Frequency distribution value (%) X(J): Representative diameter (μm) of the J-th particle diameter range

[0010] <Example 2> Spherical powder with N- ε -lauroyllisine attached to the surface was obtained in the same manner as in Example 1 except that the pulverization and mixing time was changed to 5 hours. The average particle diameter was 12 μm, and the particle diameter at a cumulative frequency of 90% of all particles was 19 μm.

[0011] <Example 3> Spherical powder with N- ε -lauroyllisine attached to the surface was obtained in the same manner as in Example 1 except that the pulverization and mixing time was changed to 64 hours. The average particle diameter was 13 μm, and the particle diameter at a cumulative frequency of 90% of all particles was 22 μm.

[0012] <Example 4> Spherical powder particles with N-lauroyl lysine adhered to the surface were obtained in the same manner as in Example 1, except that the pulverization and mixing time was changed to 120 hours. ε The average particle size was 15 μm, and the particle size at a cumulative frequency of 90% of all particles was 25 μm.

[0013] <Comparative Example 1> N ε The particle size distribution of N-lauroyl lysine (Ajinomoto Co., Inc., Amihope® LL) was measured. The average particle size was 17 μm, and the particle size at a cumulative frequency of 90% of all particles was 26 μm.

[0014] <Comparative Example 2> The particle size distribution of corn starch (Nippon Shokuhin Kako Co., Ltd., Corn Starch W) was measured. The average particle size was 20 μm, and the particle size at a cumulative frequency of 90% of all particles was 30 μm.

[0015] <Comparative Example 3> N ε 4 g of N-lauroyl lysine (Ajinomoto Co., Inc., Amihope® LL) and 16 g of corn starch (Nippon Shokuhin Kako Co., Ltd., Corn Starch W) were weighed into a 50 mL glass vial and shaken by hand 200 times, and then the particle size distribution was measured. The average particle size was 21 μm, and the particle size at a cumulative frequency of 90% of all particles was 32 μm.

[0016] The average particle sizes and the particle sizes at a cumulative frequency of 90% of all particles of the powders of Examples 1 to 4 and Comparative Examples 1 to 3 are summarized in Table 1. From Table 1, it can be seen that the average particle size has become smaller by pulverization and mixing using a ball mill. Also, from the results of Examples 1 to 4, the average particle size increases as the pulverization and mixing time becomes longer. From this, it is considered that by increasing the pulverization and mixing time, more N-lauroyl lysine adheres to the particle surface. ε

Table 1

[0017] <Example 5> N ε ​- Except for pulverizing and mixing 2 g of lauroyl lysine and 18 g of corn starch, in the same manner as in Example 1, spherical powder with N ε - lauroyl lysine adhered to the surface was obtained. The average particle diameter was 14 μm, and the particle diameter at the cumulative frequency of 90% of all particles was 20 μm.

[0018] <Example 6> N ε - Except for pulverizing and mixing 8 g of lauroyl lysine and 12 g of corn starch, in the same manner as in Example 1, spherical powder with N ε - lauroyl lysine adhered to the surface was obtained. The average particle diameter was 15 μm, and the particle diameter at the cumulative frequency of 90% of all particles was 18 μm.

[0019] <Example 7> N ε - lauroyl lysine to N ε - Except for changing to N-octanoyl lysine (Ajinomoto Co., Inc., Amihope (registered trademark) OL), in the same manner as in Example 1, spherical powder with N ε - octanoyl lysine adhered to the surface was obtained. The average particle diameter was 10 μm, and the particle diameter at the cumulative frequency of 90% of all particles was 18 μm.

[0020] <Example 8> N ε - 4 g of lauroyl lysine to N ε - 2 g of lauroyl lysine and N ε - Except for changing to a mixture of 2 g of N-octanoyl lysine (Ajinomoto Co., Inc., Amihope (registered trademark) OL), in the same manner as in Example 1, spherical powder with N ε - lauroyl lysine and N ε - octanoyl lysine adhered to the surface was obtained. The average particle diameter was 11 μm, and the particle diameter at the cumulative frequency of 90% of all particles was 18 μm.

[0021] <Test Example 1> Touch evaluation of spherical powder Corn starch (Comparative Example 2), commercially available nylon particles (Toray, SP-500) (Comparative Example 4), and the spherical powders of Examples 1, 5, 6, 7, and 8 were evaluated by sensory evaluation by 5 expert panelists for (1) a unique good feel (rolling feel) due to the rolling sensation, (2) slipperiness during application, (3) moist feeling after application, (4) absence of squeak after application, and (5) adhesion to the skin. The evaluation was performed by applying each powder to the inner part of the forearm of the panelist and evaluating it based on the following evaluation criteria with the spherical powder of Comparative Example 2 as a comparison target. For each evaluation item, the average value M of the evaluation scores of 5 panelists was calculated. When 0.5 < M ≤ 2.0, it was rated as "A"; when 0 < M ≤ 0.5, it was rated as "B"; when -0.5 < M ≤ 0, it was rated as "C"; and when -2.0 ≤ M ≤ -0.5, it was rated as "D", as shown in Table 2. In the present invention, the rolling feel means feeling a sensation as if a ball is rolling on the skin in the powder.

[0022] <Evaluation Criteria> (1) Rolling feel 2 points: There is a comfortable rolling feel compared to the comparison target. 1 point: There is a slightly comfortable rolling feel compared to the comparison target. 0 point: There is an equivalent rolling feel compared to the comparison target. -1 point: There is a slightly upward-sliding feel compared to the comparison target. -2 points: There is an upward-sliding feel compared to the comparison target. (2) Slipperiness during application 2 points: There is a comfortable slipperiness compared to the comparison target. 1 point: There is a slightly comfortable slipperiness compared to the comparison target. 0 point: There is an equivalent slipperiness compared to the comparison target. -1 point: There is a slightly catching feel compared to the comparison target. -2 points: There is a catching feel compared to the comparison target. (3) Moist feeling after application 2 points: There is a comfortable moist feeling compared to the comparison target. 1 point: There is a slightly comfortable moist feeling compared to the comparison target. 0 point: There is an equivalent moist feeling compared to the comparison target. -1 point: Slightly rough compared to the comparison target -2 points: Rough compared to the comparison target (4) Absence of creaking after application 2 points: A pleasant smooth feeling continues compared to the comparison target 1 point: A slightly pleasant smooth feeling continues compared to the comparison target 0 point: A smooth feeling of the same degree continues compared to the comparison target -1 point: Slightly creaking compared to the comparison target -2 points: Creaking compared to the comparison target (5) Adhesion to the skin 2 points: Very high adhesion compared to the comparison target 1 point: Slightly higher adhesion compared to the comparison target 0 point: The same degree of adhesion as the comparison target -1 point: Slightly floating compared to the comparison target -2 points: Floating compared to the comparison target

[0023]

Table 2

[0024] <Example 9> Preparation of pressed foundation According to the formulation shown in Table 3, a solid foundation was manufactured as follows. Manufacturing method: In Table 3, the components (A) were mixed, and the component (B) heated and dissolved was added and further mixed uniformly. It was sieved through a 150 μm sieve to make the particle size uniform, filled in a gold dish and compression molded.

[0025]

Table 3

[0026] <Comparative Example 5> A press foundation was prepared in the same manner as in Example 9, except that the "spherical powder of Example 1" in Table 3 of Example 9 was changed to nylon powder (Toray, SP-500).

[0027] <Comparative Example 6> A press foundation was prepared in the same manner as in Example 9, except that the "spherical powder of Example 1" in Table 3 of Example 9 was changed to corn starch (Nippon Shokuhin Kako Co., Ltd., Corn Starch W).

[0028] <Test Example 2> Touch Evaluation of Press Foundation For Comparative Examples 5 and 6, and Example 9, (1) the unique good feel (rolling feel) due to the rolling feeling during application, (2) the slipperiness during application, (3) the moist feeling after application, (4) the absence of squeaking after application, and (5) the adhesion to the skin were evaluated by sensory evaluation by 5 professional panelists. The evaluation was carried out by applying each powder to the inner part of the forearm of the panelist and evaluating it based on the following evaluation criteria with the Presto foundation of Comparative Example 6 as the comparison target. For each evaluation item, the average value M of the evaluation scores of 5 panelists was calculated. When 0.5 < M ≤ 2.0, it was rated as "A"; when 0 < M ≤ 0.5, it was rated as "B"; when -0.5 < M ≤ 0, it was rated as "C"; when -2.0 ≤ M ≤ -0.5, it was rated as "D", as shown in Table 3.

[0029] <Evaluation Criteria> (1) Rolling feel 2 points: There is a comfortable rolling feel compared to the comparison target. 1 point: There is a slightly comfortable rolling feel compared to the comparison target. 0 point: There is an equivalent rolling feel compared to the comparison target. -1 point: There is a slightly upward-sliding feel compared to the comparison target. -2 points: There is an upward-sliding feel compared to the comparison target. (2) Slipperiness during application 2 points: There is a comfortable slipperiness compared to the comparison target. 1 point: There is a slightly comfortable slipperiness compared to the comparison target. 0 point: There is an equivalent slipperiness compared to the comparison target. -1 point: There is a slightly catching feel compared to the comparison target. -2 points: There is a catching feel compared to the comparison target. (3) Moist feeling after application 2 points: There is a comfortable moist feeling compared to the comparison target. 1 point: There is a slightly comfortable moist feeling compared to the comparison target. 0 point: There is an equivalent moist feeling compared to the comparison target. -1 point: There is a slightly dry feeling compared to the comparison target. -2 points: There is a dry feeling compared to the comparison target. (4) Absence of squeaking after application 2 points: Compared with the comparison target, the smooth feeling continues 1 point: Compared with the comparison target, a slightly smooth feeling continues 0 point: Compared with the comparison target, a similar smooth feeling continues -1 point: Compared with the comparison target, there is a slightly squeaky feeling -2 points: Compared with the comparison target, there is a squeaky feeling (5) Adhesion to the skin 2 points: Compared with the comparison target, the adhesion is very high 1 point: Compared with the comparison target, the adhesion is slightly high 0 point: Compared with the comparison target, the adhesion is at a similar level -1 point: Compared with the comparison target, it is slightly floating -2 points: Compared with the comparison target, it is floating

[0030]

Table 4

Claims

1. On the surface of an elastic powder that is corn starch, there is a spherical powder in which one or more components of N ε -lauroyl lysine and N ε -octanoyl lysine are present, The ratio of the total mass of the above one or more components to the mass of the elastic powder is from 1:9 to 4:6, Spherical powder having an average particle diameter of 10 to 13 μm and a particle diameter at a cumulative frequency of 90% of all particles of 15 to 20 μm.

2. A cosmetic containing the spherical powder according to Claim 1.

3. Elastic powder that is corn starch, and N ε - lauroyl lysine and N ε - A method for producing spherical powder, comprising pulverizing and mixing one or more of octanoyl lysine.

4. The manufacturing method according to Claim 3, for manufacturing a spherical powder having an average particle diameter of 5 to 25 μm and a particle diameter at a cumulative frequency of 90% of all particles of 35 μm or less.

5. The manufacturing method according to Claim 3 or 4, wherein the pulverization and mixing includes pulverizing and mixing using alumina balls having a diameter of 0.5 to 5 cm by a ball mill.

6. The manufacturing method according to Claim 5, wherein the pulverization and mixing by the ball mill is performed at 100 rpm for 5 to 120 hours.

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