Sakai Chemical Industry Co., Ltd.

Mitsuo Hashimoto

Satoru Sueda

Atsuki Terabe

Koichiro Magara

Nobuo Watanabe

Ryohei Yoshida

Mizuho Wada

Hiroyuki Izumikawa

Kazutaka Murai

Keita Kobayashi

Hiroshi Hakozaki

Ikuhisa Nakanishi

Takahiro Domoto

Kunitada Nishida

Watanabe,nobuo

The present invention provides zinc oxide having excellent infrared blocking ability, high whiteness, and excellent texture during use. The present invention relates to trivalent metal-doped hexagonal plate-shaped zinc oxide having an aspect ratio of 2.5 or greater, the trivalent metal-doped hexagonal plate-shaped zinc oxide having a trivalent metal element content based on the zinc element of 0.15 to 5 mol %, a whiteness of 90 or higher, and a powder spectral reflectance at a wavelength of 1500 nm of 80% or less.

Trivalent metal-doped hexagonal plate-shaped zinc oxide and method for producing same

The present invention provides a method capable of producing hexagonal plate-shaped zinc oxide having a small thickness and a small variation in the particle size. The present invention relates to a method for producing hexagonal plate-shaped zinc oxide, the method including: a step (1) of preparing a slurry mixture containing starting particulate zinc oxide, a zinc acetate solution, and a chloride; and a step (2) of heat aging the slurry mixture obtained in the step (1) at 60&#xb0; C. to 100&#xb0; C.

Method for producing hexagonal plate-shaped zinc oxide

This invention provides a material that is capable of preparing an external composition that achieves high smoothness and low roughness and that reflects near-infrared rays. Specifically, a granular composite comprising keratin and hexagonal plate-shaped zinc oxide particles is provided.

Granular composite containing keratin and hexagonal plate-like zinc oxide

It is one of objects of the present disclosure to provide hexagonal plate-shaped zinc oxide particles which can be used suitably for a cosmetic, a filler, a resin composition, an infrared radiation reflective material, and a coating composition, and a method for producing the same. Hexagonal plate-shaped zinc oxide particles having a primary particle diameter of 1.1 &#x3bc;m or more and a D90/D10 of 3.0 or less in particle size distribution.

Hexagonal plate-shaped zinc oxide particles, method for production of the same, and cosmetic, filler, resin composition, infrared reflective material, and coating composition containing the same

It is one of the objects of the present disclosure to provide hexagonal plate-shaped zinc oxide particles having suitable performances derived from the shape thereof, that is, zinc oxide particles having improved ultraviolet shielding ratio at the wavelength of 400 nm or less without impairing the direct transition properties of electronic excitation thereof and having remarkably improved ultraviolet shielding ratio for UV-B radiation and UV-A radiation. A zinc oxide particle containing a solid solution of a Ti element and/or a Fe element and a Zn element in at least a portion thereof, and having a hexagonal plate shape.

Zinc oxide particle, method for producing the same, ultraviolet shielding agent, and cosmetic

It is one of the objects of the present disclosure to provide hexagonal prism-shaped zinc oxide particles having improved ultraviolet shielding ratio at the wavelength of 400 nm or less without impairing the direct transition properties of electronic excitation thereof and having remarkably improved ultraviolet shielding ratio for UV-B radiation and UV-A radiation; and a zinc oxide particle containing a solid solution of a Ti element and/or a Fe element and a Zn element in at least a portion thereof, and having a hexagonal prism shape.

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

The object of the present disclosure is to obtain a filler particle having stable insulation property, and a resin composition, grease, and a coating composition comprising the same, respectively. Filler particles comprising a composite zinc oxide expressed by the following chemical formula (1):ZnMO&#x2003;&#x2003;(1)in the formula, M is Mg, Co, Li, K, Na, or Cu, and x+ny/2=1 when the valence of M is n.

Filler particles, resin composition, grease, and coating composition

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.

Method for production of zinc oxide particles

The present disclosure provides a zinc oxide particle that can be used more suitably than common zinc oxide in the application such as an exoergic filler and the like, and can be used in the other applications. A zinc oxide particle having a median size of 1 to 30 &#x3bc;m and D90/D10 of 4 or less is provided.

Method for producing zinc oxide using ammonium bromide, exoergic filler, resin composition, exoergic grease and exoergic coating composition comprising the zinc oxide

A zinc oxide particle having large particle diameter and being high-density is provided. An exoergic resin composition, an exoergic grease and an exoergic coating composition containing the zinc oxide particle exhibit an excellent exoergic property. The zinc oxide particle being high-density, has a density of 4.0 g/cmor more, median size (D50) of 17 to 10000 &#x3bc;m and tap bulk density of 3.10 g/cmor more.

Zinc oxide particle having high bulk density, method for producing it, exoergic filler, exoergic resin composition, exoergic grease and exoergic coating composition

Growing community of inventors

Fukushima, Japan

Mitsuo Hashimoto