JP2001181128A - Liquid cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a black liquid cosmetic which hardly causes clogging due to settling with time when filled in an application tool with a built-in cosmetic and has high safety. SOLUTION: This cosmetic comprises sepiomelanin, an amphoteric compound and water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a black liquid cosmetic which can be suitably used without filling over time by filling into a cosmetic-containing type applicator.

[0002]

2. Description of the Related Art Conventionally, carbon black and iron black have been generally used as colorants for black liquid cosmetics. However, the safety of carbon black has been questioned since it may contain carcinogen, ventzpyrene. Further, iron black has no problem in safety as compared with carbon black, but has a problem that it tends to settle when used in a liquid cosmetic having a large specific gravity and a relatively low viscosity, and tends to be clogged when filled in an applicator. In order to solve this problem, iron black particles have been made into ultrafine particles of 0.1 μm or less, but this method has a problem that although the sedimentation is slow, iron black is oxidized with time and turns brown. Have.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a highly safe black liquid cosmetic which can be used for a liquid cosmetic having a relatively low viscosity without clogging over time.

[0004]

That is, the gist of the present invention is a black liquid cosmetic comprising at least sepiomelanin, an amphoteric compound and water.

Hereinafter, the present invention will be described in detail. Sepiomelanin is used as a coloring agent. Melanin extracted from squid ink with hydrochloric acid is dried and powdered, and its main component is melanin. MEL of Sasaki Chemical Co., Ltd.
Melanin from ANIN, SIGMA
Sepia officinalis and the like.

The amphoteric compound is used as a dispersant for sepiomelanin. As an example, Yuka Former R205 which is a betaine type acrylic acid type amphoteric resin
S, Yuka Former 510, Yuka Former 104-
D, Yukaformer 204WL, and the like, imidazoline-type amphoteric surfactant, betaine acetate-type amphoteric surfactant, and the like. The amount of the amphoteric compound used is 10 per 100 parts by weight of sepiomelanin.
~ 300 parts by weight are preferred. If the amount is less than 10 parts by weight, the dispersion stabilization of sepiomelanin becomes insufficient and sedimentation may occur over time. Even if it is used in excess of 300 parts by weight, no improvement in dispersion stabilization is observed and it is not economical. In particular, when a resin is used, the viscosity of the liquid cosmetic becomes too high, and when filled with an applicator, the cosmetic becomes There is a risk that the ink will not be discharged smoothly.

Water is used as the main solvent. In addition to the above essential components, a water-soluble organic solvent for preventing freezing of the liquid cosmetic, a surfactant for adjusting applicability to the skin,
Resins, antiseptic and fungicides, pH adjusters, and various dyes and pigments for adjusting color tone can be used for imparting fixability and water resistance of the applied cosmetic to the skin. Among the substances that can be added, ethylene glycol, propylene glycol, 1,3-butylene glycol, glycerin, polyethylene glycol and the like can be used as the water-soluble organic solvent.

[0008] The liquid cosmetic of the present invention can be prepared by a method generally used. For example, as an example, an amphoteric compound may be dissolved or dispersed in water, and sepiomelanin may be added thereto, followed by dispersion with a conventionally known dispersing machine such as a three-roll mill or a bead mill. At this time, coarse particles that cannot be dispersed may be removed by filtration or centrifugation to uniformize the particles. Components that can be added other than the essential components may be added before or after dispersion.

[0009]

[Effects] It is not clear why sepiomelanin is dispersed when an amphoteric compound is used as a dispersant to obtain stable dispersion and does not cause clogging over time when filled in an applicator, but it is speculated as follows. . There are many imino groups in the structure of sepiomelanin. In addition, a carboxyl group exists in the amphoteric compound. As the carboxyl group in this amphoteric compound forms a hydrogen bond with the imino group of sepiomelanin, sepiomelanin is wrapped with the cationic group in the amphoteric compound, and as a result, it has strong affinity with water as the main solvent. State. Due to this affinity, sepiomelanin is presumed to be a liquid cosmetic which is unlikely to settle out over time since sepiomelanin exists in a state of being stably dispersed in the cosmetic for a long time. It is considered that this makes it possible to smoothly discharge since no clogging occurs due to sedimentation in the applicator.

[0010]

The present invention will be described in more detail with reference to the following examples. In addition,
The term “parts” simply indicates “parts by weight”. Example 1 MELANIN (Melanin, manufactured by Sasaki Chemical Co., Ltd.) 15.0 parts Yuka Former R205S (betaine type acrylic acid-based amphoteric resin, manufactured by Mitsubishi Chemical Corporation) 15.0 parts Nikkor NP-10 (POE nonyl phenyl ether, Activator, Nikko Chemicals Co., Ltd. 1.0 part New Side SC (sodium dehydroacetate, preservative, Nippon Synthetic Chemical Co., Ltd.) 0.5 part Glycerin 10.0 parts Purified water 58.5 parts Among the components, Yuka Former R205S, Nikkor NP-10, the total amount of sodium dehydroacetate and 30 parts by weight of ion-exchanged water were mixed and uniformly dissolved, and then the whole amount of melanin was added and stirred for 30 minutes until uniform. This was passed through a three-roll mill five times. The remaining purified water was added thereto and stirred for 1 hour to obtain a black liquid cosmetic having a viscosity of 13 cps.

Example 2 MELANIN 13.0 parts SWANOLAM-301 (betaine acetate activator, manufactured by Nikko Chemicals Co., Ltd.) 2.9 parts Plaquen M (methyl paraoxybenzoate, preservative, manufactured by Nippon Synthetic Chemical Co., Ltd.) 0.7 parts Daitosol 5000SJ (acrylate resin emulsion, fixing agent, manufactured by Daito Kasei Co., Ltd.) 7.0 parts Propylene glycol 10.0 parts Purified water 66.4 parts Of the above components, components other than Daitosol 5000SJ are used. After stirring for 1 hour to uniformly mix and dissolve, the mixture was dispersed for 1 hour with a Dynomill (medium disperser manufactured by Shinmaru Enterprises Co., Ltd.). The total amount of Daitosol 5000SJ was added to this solution and stirred for 1 hour to obtain a black liquid cosmetic having a viscosity of 8 cps.

Example 3 MELANIN 18.0 parts SWANOLAM101 (imidazoline-type amphoteric surfactant, manufactured by Nikko Chemicals Co., Ltd.) 7.0 parts Newside SC 0.5 part 1,3-butylene glycol 14.0 parts Rheological GX- 205 (poly N-vinylacetamide, thickener, manufactured by Nippon Pure Chemical Co., Ltd.) 1.0 part Purified water 69.5 parts
The mixture was stirred for a period of time to be uniformly mixed and dissolved. The whole amount of Rheological GX-205 was added to this liquid and stirred for 1 hour to obtain a black liquid cosmetic having a viscosity of 820 cps.

Comparative Example 1 MELANIN 13.0 parts PVA-117 (polyvinyl alcohol, manufactured by Kuraray Co., Ltd.) 3.6 parts Platingness M 0.7 parts Daitosol 5000SJ 7.0 parts Propylene glycol 10.0 parts Purified water 65. 7 parts Of the above components, components other than Daitosol 5000SJ were stirred for 1 hour to uniformly mix and dissolve, and then dispersed for 1 hour using a Dynomill (a medium disperser manufactured by Shinmaru Enterprises Co., Ltd.). The total amount of Daitosol 5000SJ was added to this solution and stirred for 1 hour to obtain a black liquid cosmetic having a viscosity of 34 cps.

Comparative Example 2 MELANIN 13.0 parts NIKKOR BO-20 (POE stearyl ether, manufactured by Nikko Chemicals Co., Ltd.) 2.9 parts Plating N M 0.7 parts Daitosol 5000SJ 7.0 parts Propylene glycol 10.0 parts Purification 66.4 parts of water Among the above components, components other than Daitosol 5000SJ were stirred and uniformly mixed and dissolved for 1 hour, and then dispersed for 1 hour using a Dynomill (a medium dispersing machine manufactured by Shinmaru Enterprises Co., Ltd.). The total amount of Daitosol 5000SJ was added to this liquid and stirred for 1 hour to obtain a black liquid cosmetic having a viscosity of 7 cps.

[0015]

The results of the pigment sedimentation test and the temporal clogging test of the liquid cosmetics obtained in Examples 1 to 3 and Comparative Examples 1 and 2 are shown in Table 1.

[0016]

[Table 1]

Pigment sedimentation: 5 ml of the black liquid cosmetics obtained in Examples and Comparative Examples were filled into a sealable screw test tube having an inner diameter of 10 mm and a length of 80 mm, and sedimentation occurred when the temperature was aged at 50 ° C. I confirmed the number of days before the operation. Clogging with time: The black liquid cosmetics obtained in Examples and Comparative Examples are filled into an applicator having a pen tip with a bundle of nylon filaments for trial production, and the pen tip is turned down to be unable to be applied at 50 ° C. with time. The number of days until was confirmed.

As described in detail above, the black liquid cosmetic according to the present invention has a smooth discharge which is less likely to sediment even when aging, and is less likely to be clogged with aging when filled into a cosmetic-containing type applicator. Is obtained.

Claims (1)

[Claims] 1. A liquid cosmetic comprising at least one of sepiomelanin, an amphoteric compound and water.