Mitsubishi Pencil Company, Limited

Keiichiro Takachiyo

Satoshi Sakuma

Nobuyuki Nakajima

Takashi Umeno

Hiroaki Koyama

Shigeki Ooba

Tomoko Hasegawa

Yuuya Nagasaka

Provided are a pigment dispersion liquid for cosmetics having excellent dispersibility of carbon black and aging stability, and an aqueous liquid cosmetic using the same, which is suitable for hair dyes and the like. The pigment dispersion liquid for cosmetics contains, at least, water, a water-soluble organic solvent, carbon black, and a (methacryloyl ethylbetaine/acrylates) copolymer, and a ratio of the water to total solvents is 30 to 95% by mass.

Pigment dispersion liquid for cosmetics, and aqueous liquid cosmetic using same

Provided are a pigment dispersion liquid for cosmetics having excellent dispersibility for a pigment of Pigment Red 4 (C.I. 12085) and aging stability, and an aqueous liquid cosmetic using the same, which is suitable for hair dyes and the like. The pigment dispersion liquid for cosmetics contains, at least, water, a water-soluble organic solvent, a pigment of Pigment Red 4 (C.I. 12085), and a (methacryloyl ethylbetaine/acrylates) copolymer, and a ratio of the water to total solvents is 30 to 95% by mass.

To provide an applicator with an application body that is nonabsorbent and can uniformly spread and apply an application liquid over the surface to be applied on without scraping the applied liquid during application. The application body includes a membranous part that is easily deformable in applying liquid, and a cavity part enclosed by the membranous part, and constructed such that when the applying surface of the membranous part comes into contact with the surface to be applied on, the contact surface of the membranous part fits closely following the surface to be applied on by the pressure of the membranous part acting onto the contact surface of the surface to be applied on.

Applicator

Provided is a hair dye comprising 0.1 to 3.0% by weight of at least one of aqueous acid dyes and a resin comprising a terpolymer constituted from a vinyl cyclic amide, an acrylic acid derivative and a quaternary derivative of acrylic acid, wherein a content of the resin is 0.1 to 2.5% by weight in terms of a solid content; and the hair dye further comprises 1.0 to 20% by weight of a hair dyeing auxiliary agent, 20 to 60% by weight of a lower alcohol and 20 to 60% by weight of water and has a pH of 2 to 4.

Growing community of inventors

Fujioka, Japan

Keiichiro Takachiyo