Sakai Chemical Industry Co., Ltd.

Koichiro Magara

Satoru Sueda

Mitsuo Hashimoto

Atsuki Terabe

Nobuo Watanabe

Keita Kobayashi

Takuro Ashida

Kunitada Nishida

Akifumi Sano

Ayana Shike

Watanabe,nobuo

The present invention provides a liquid dispersion capable of stably maintaining the dispersed state for a long time and suitably applicable to both O/W type cosmetic products and W/O type cosmetic products. The present invention also provides a cosmetic raw material containing the liquid dispersion and a cosmetic product containing the liquid dispersion. The present invention provides a liquid dispersion containing a polyol (A); a nonionic surfactant (B); and a hydrophobized inorganic powder (C), wherein the water content in 100% by mass of the liquid dispersion is 1% by mass or less.

Liquid dispersion and uses thereof

The present disclosure provides spherical zinc oxide particles consisting of integrated plate-like particles which can be used as a cosmetic raw material, a thermal conductive filler and the like, and a method for production of the same. Spherical zinc oxide particles consisting of integrated plate-like particles, which have a median size of 0.01 &#x3bc;m or more and a D90/D10 in particle size distribution of 5.0 or less are provided.

Spherical zinc oxide particle consisting of integrated plate-like particles, method for producing the same, cosmetic, and thermal conductive filler

It is an object of the present invention to provide hexagonal prism-shaped zinc oxide particles which have a specific particle diameter and a specific aspect ratio, and high ultraviolet blocking performance and transparency, and therefore can be suitably used as a cosmetic and a heat releasing material. Provided are hexagonal prism-shaped zinc oxide particles having a primary particle diameter of 0.1 &#x3bc;m or more and less than 0.5 &#x3bc;m and an aspect ratio of less than 2.5.

Hexagonal prism-shaped zinc oxide particles, method for production of the same, and cosmetic, heat releasing filler, heat releasing resin composition, heat releasing grease, and heat releasing coating composition comprising the same

An object of the present invention is to provide rounded zinc peroxide particles having a large particle diameter, the rounded zinc peroxide particles having excellent performance because they have an average particle diameter of 0.04 &#x3bc;m or more, a small aspect ratio and a shape close to a spherical shape; rounded zinc oxide particles which are obtained by calcinating the rounded zinc peroxide particles and which have a small aspect ratio and a sharp particle size distribution; a method for production thereof; and a cosmetic and a heat releasing filler each containing the rounded zinc oxide particles. Provided are rounded zinc peroxide particles having an average particle diameter of 0.04 &#x3bc;m or more and an aspect ratio of 2.0 or less, and rounded zinc oxide particles which are obtained by thermally decomposing the rounded zinc peroxide particles and which have an average particle diameter of 0.04 &#x3bc;m or more and an aspect ratio of 2.0 or less.

Rounded zinc peroxide particles, rounded zinc oxide particles, method for production thereof, cosmetic and heat releasing filler

An object of the present invention is to provide hexagonal plate-shaped zinc oxide particles which can be used as a cosmetic raw material, a heat releasing filler and the like, a method for production of the same, and a cosmetic, a heat releasing filler, a heat releasing resin composition, a heat releasing grease and a heat releasing coating composition each comprising the same. Provided are hexagonal plate-shaped zinc oxide particles having hexagonal-shaped surfaces, wherein the primary particle diameter is 0.01 &#x3bc;m or more and the aspect ratio is 2.5 or more, and 50% or more of 250 particles in a transmission electron microscope photograph satisfy both the requirements (1) the particle has a hexagonal-shaped surface; and (2) Dmin/Dmax&#x2267;0.3, where Dmax: a length of the largest diagonal line of three diagonal lines of the hexagonal-shaped surface of the hexagonal plate-shaped zinc oxide particle; and Dmin: a length of the smallest diagonal line of three diagonal lines of the hexagonal-shaped surface of the hexagonal plate-shaped zinc oxide particle.

Hexagonal plate-shaped zinc oxide particles, method for production of the same, and cosmetic, heat releasing filler, heat releasing resin composition, heat releasing grease, and heat releasing coating composition comprising the same

It is an object of the present invention to provide zinc oxide particles which have excellent ultraviolet blocking performance and also excellent dispersibility, and therefore can be suitably used as an ultraviolet blocking agent for cosmetics. Provided are zinc oxide particles having a primary particle diameter of less than 0.1 &#x3bc;m, an aspect ratio of less than 2.5 and an oil absorption/BET specific surface area of 1.5 ml/100 mor less.

Zinc oxide particles, method for production of the same, and cosmetic, heat releasing filler, heat releasing resin composition, heat releasing grease, and heat releasing coating composition comprising the same

It is an object of the present invention to provide a new method for production of zinc oxide particles which can control the particle diameter and particle shape of obtained zinc oxide particles by selecting suitable conditions, and can prepare zinc oxide applicable to various applications. A method for production of zinc oxide particles, comprising a step of aging a zinc oxide raw material in an aqueous zinc salt solution.

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Fukushima, Japan

Koichiro Magara