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Pigment dispersion liquid for cosmetic compositions, and aqueous liquid cosmetic composition using same
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一种颜料分散液、水系液体的技术，应用在化妆品配制品、化妆品、化妆品等方向，能够解决难以擦掉等问题
Active Publication Date: 2020-10-30
MITSUBISHI PENCIL CO LTD
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[0005] 1) Patent Document 1 describes the following problem: In some countries, carbon black cannot be used in cosmetics due to suspicion of carcinogenicity, etc., although it develops color There is no problem, but it is difficult to wipe off when removing makeup, etc.
But there is no special mention about the addition of inorganic pigments headed by carbon black
Method used
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Embodiment 1
[0085] Next, the present invention will be described in more detail by way of examples and comparative examples, but the present invention is not limited to the following examples and the like.
Embodiment 1～12 and comparative example 1～4
[0086] [Examples 1 to 12 and Comparative Examples 1 to 4: Preparation of Pigment Dispersion for Cosmetics]
[0087] According to the compounding recipe shown in the following Table 1, dispersion|distribution was carried out by the bead mill, and the pigment dispersion liquid for cosmetics was prepared.
[0088] For the obtained pigment dispersions for cosmetics of Examples 1 to 12 and Comparative Examples 1 to 4, the particle diameter and temporal stability of the pigment dispersions for cosmetics were evaluated by the following evaluation method.
[0089] These evaluation results are shown in Table 1 below.
[0090] (Measurement of Particle Size of Pigment Dispersion Liquid for Cosmetics)
[0091] For each of the obtained pigment dispersions for cosmetics, the particle size (average particle size based on histogram of scattered light intensity distribution) was measured at 25°C using a particle size distribution measuring device [FPAR-1000 (manufactured by OTSUKA ELECTRONICS...
Embodiment 13～18 and comparative example 5
[0101] [Examples 13-18 and Comparative Example 5: Preparation of Hair Dye]
[0102] Hair dyes were prepared by using the respective pigment dispersions for cosmetics obtained above and stirring according to the compounding formulations shown in Table 2 below.
[0103] For each of the obtained hair dyes, the particle size and temporal stability were measured by the above-mentioned measuring method, and the viscosity, pH, dyeability, and drying property were evaluated by the following evaluation methods.
[0104] These results are shown in Table 2 below.
[0105] (Measuring method of viscosity)
[0106] About each hair dye of Examples 13-18 obtained by the said method, and the comparative example 5, the viscosity in 25 degreeC was measured (by the cone-plate type viscometer: the viscosity of 50 rpm).
[0107] (measurement method of pH)
[0108] About each hair dye of Examples 1-18 obtained by the said method, and the comparative example 5, pH in 25 degreeC was measured with t...
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Abstract
Provided are: a pigment dispersion liquid for cosmetic compositions, which has excellent dispersibility of carbon black and excellent long-term stability; and an aqueous liquid cosmetic composition which uses this pigment dispersion liquid for cosmetic compositions, and which is suitable for hair dyes and the like. This pigment dispersion liquid for cosmetic compositions is characterized by containing at least water, a water-soluble organic solvent, carbon black and a methacryloyl ethyl betaine / acrylates copolymer, and is also characterized in that the ratio of water to all solvents is 30-95%by mass.
Description
technical field [0001] The present invention relates to a pigment dispersion liquid for cosmetics having excellent carbon black dispersibility and temporal stability, and an aqueous liquid cosmetic using the same. Background technique [0002] Conventionally, various pigment-containing materials have been used as colorants for cosmetics such as temporary hair dyes and make-up cosmetics because of their excellent hiding properties and color development. In addition, amphoteric polymer resins are often used as resins added to cosmetics such as hair dyes. [0003] On the other hand, carbon black is a material used as a coloring material of water-based makeup cosmetics and hair dyes. In eye makeup cosmetics, carbon black is used to apply around the eyes such as eyelids, eyelashes, and eyebrows to add color and shadow to give an attractive impression. In addition, among hair dyes, carbon black is used for hair dyeing such as gray hair. This carbon black has strong tinting powe...
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