KR-20260065614-A - Water-based liquid cosmetics

Abstract

By suppressing the sedimentation of plate-shaped pigments that exhibit luminosity, a water-based liquid cosmetic is provided that can be suitably mounted in a direct-type applicator such as an eyeliner, eyeshadow, or eyebrow pencil equipped with an applicator having a coating part having a coating part, and enables the writing of lines with consistent color and luminosity over time. The water-based liquid cosmetic of the present disclosure is characterized by being loaded in a dispensing nozzle having a dispensing portion composed of a water-based coating, containing at least (a) 0.01 to 10 mass% of a plate-shaped pigment coated on the surface with a compound selected from the following group A, (b) at least one chromatic pigment having an average particle diameter of 0.01 to 1 μm measured by dynamic light scattering, (c) 1 to 20 mass% of an acrylic copolymer in terms of solid content, and (d) water. Group A: Cellulose, hemicellulose, lignin, chitin, chitosan

Inventors

• 요시무라 아이
• 야마자키 유이치

Assignees

• 미쓰비시 엔피쯔 가부시키가이샤

Dates

Publication Date

20260508

Application Date

20240827

Priority Date

20230901

Claims (4)

1. A water-based liquid cosmetic composition characterized by being loaded in a dispensing nozzle having a dispensing portion composed of a spike, containing at least (a) 0.01 to 10 mass% of a plate-shaped pigment coated on the surface with a compound selected from Group A below, (b) at least one type of chromatic pigment having an average particle diameter of 0.01 to 1 μm measured by dynamic light scattering, (c) 1 to 20 mass% of an acrylic copolymer in terms of solid content, and (d) water. Group A: Cellulose, hemicellulose, lignin, chitin, chitosan
2. In claim 1, A water-based liquid cosmetic characterized by additionally including a thickening agent.
3. In claim 2, A water-based liquid cosmetic characterized in that the above-mentioned thickener is a dextrin and/or a thickening polysaccharide.
4. In claim 1 or claim 2, A water-based liquid cosmetic characterized by a viscosity of 15.0 mPa·s or less, measured at 25℃ and a shear rate of 191.5 s⁻¹ .

Description

Water-based liquid cosmetics The present specification relates to a water-based liquid cosmetic containing a plate-shaped pigment that exhibits radiance, and more specifically, to a water-based liquid cosmetic suitable for use in direct-liquid eyeliners, eyeshadows, eyebrow pencils for drawing lines on eyebrows, etc., by inhibiting the sedimentation of the plate-shaped pigment. Conventionally, in water-based liquid cosmetics intended to form a luminous film on a surface to be applied, such as skin or eyebrows, it is generally practiced to contain plate-shaped pigments that exhibit luminosity (luminous pigments). However, this plate-like pigment was prone to settling; once it settled and formed a layered hard cake, the layered structure was difficult to peel off again, and redispersing it in a liquid was also difficult. Consequently, the luminous pigment overlapped within the lines, making it impossible to achieve the desired brightness level corresponding to the mixing ratio. Here, by resolving the above issue, a method is known to prevent the formation of a hard cake of layered plate-like pigments by using a vehicle with high viscosity, for example; however, this method has problems such as limitations in the extrusion means or its structure. Meanwhile, looking at patent literature on water-based liquid cosmetics containing plate-shaped pigments or their applicators, for example, 1) A water-based cosmetic composition having high brightness and usable as a brush pen type eyeliner, comprising (a) a luminous pigment having an average particle diameter of 10 to 100 μm, (b) an acrylic resin emulsion, and (c) a thickening agent selected from the group consisting of silica, clay mineral, palmitoyl dipeptide, cellulose, cellulose nanofiber, and xanthan gum, wherein the content of the component (c) is 0.1 to 0.35 mass% and the viscosity at 25°C is 5 to 30 mPa·s (e.g., see Patent Document 1). 2) A water-based eyeliner composition having excellent friction resistance, vivid color development and a smooth writing feel, and additionally good preservation stability, comprising a combination of a luminous pigment, carbon black, a polysaccharide derived from microorganisms, a volatile alcohol, and an alkyl acrylate copolymer emulsion (e.g., see Patent Document 2). 3) In order to provide a water-based makeup cosmetic that spreads smoothly and widely, has excellent color development and glossiness for high cosmetic effect, has good adhesion to the skin and excellent cosmetic longevity, and also has excellent preservation stability, the water-based makeup cosmetic comprises (A) an aqueous alkali-thickening polymer emulsion, (B) a pigment, (C) a luminous powder, (D) an ethanol-soluble film-forming agent, and (E) an alkali, and contains at least carbon black as the component (B) (e.g., see Patent Document 3). 4) In order to provide a liquid cosmetic composition in which a plate-shaped pigment having a small amount of luminous properties is filled into a coating port having a coating portion such as a spiky tip, and a clear luminous film is easily obtained without the plate-shaped pigment overlapping when applied to a surface to be coated such as skin, a liquid cosmetic composition is known that contains at least 0.01 to 10 mass% of a plate-shaped pigment coated on the surface with a compound selected from the group of cellulose, hemicellulose, lignin, chitin, and chitosan, 0.05 to 5 mass% of layered clay mineral particles, 1 to 20 mass% of an acrylic copolymer in terms of solid content, and water, and is filled into a coating port having a coating portion having a spiky tip (e.g., see Patent Document 4). However, regarding the water-based liquid cosmetic formulations containing plate-shaped pigments according to the above patent documents 1 to 4, there are still problems such as impairing the brightness of the plate-shaped pigments when pigments or layered viscous minerals are incorporated to improve color, etc. Furthermore, if plate-shaped pigments exist on the drawing line while overlapping each other, there are problems such as causing a decrease in brightness, and there have been cases where redispersion in the liquid became difficult because they formed a structure with other pigments added and became a layered hard cake. As a result, the ejection of the pigment was hindered, causing problems such as the inability to achieve the appropriate color development or brightness with the amount of pigment incorporated. Additionally, when the water-based liquid cosmetic formulations according to the above patent documents 1 to 3 are loaded (filled) into direct-type eyeliners, eyeshadows, etc., equipped with a coating part having a water-based applicator, there are still problems such as insufficient ejection or poor writing performance (applicability). [Fig. 1] (a) and (b) are a perspective view and a longitudinal section view of a dispensing mouthpiece having a dispensing portion composed of a water-based liquid cosmetic, repres