Sakai Chemical Industry Co., Ltd.

Sakai Chemical Industry., Ltd.

Hiroyuki Izumikawa

Satoru Sueda

Mitsuo Hashimoto

Atsuki Terabe

Hirobumi Yoshida

Keiji Ono

Takuro Ashida

Masayuki Asada

Seiji Sakamoto

Takeshi Nishimura

Yusuke Shimizu

Junichi Miyake

The invention provides surface-treated spherical calcium carbonate particles for use in cosmetics which comprise spherical calcium carbonate particles having a volume mean diameter in a range of 0.5 to 20 &#x3bc;m, and having on their surfaces a hydrous silica coating, and further a silicone oil coating on the hydrous silica coating. The surface-treated spherical calcium carbonate particles for use in cosmetics are obtained by forming a hydrous silica coating on the surfaces of spherical calcium carbonate particles, and then by forming a silicone oil coating on the surfaces of the hydrous silica coating of the particles.

Surface-treated spherical calcium carbonate particles for cosmetics and method for producing 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

The present invention has an object to provide a method for producing particulate barium carbonate having desired properties such as high purity, fineness, and has a spherical shape. The present invention relates to a method of producing substantially spherical barium carbonate, including (A) mixing, in an aqueous medium, a barium compound with at least one first ingredient selected from the group consisting of gluconic acid or salts thereof, gluconolactone, glucoheptonic acid or salts thereof, and glucoheptonolactone, to prepare a mixture; and (B) reacting the barium compound with carbon dioxide or a water-soluble carbonate in the mixture, to produce substantially spherical barium carbonate.

Generally spherical barium carbonate particles, and method for producing generally spherical barium carbonate particles

The present invention has an object to provide a flaky particulate material giving skin an excellent smoothness, which is free from whitening problem upon use thereof owing to its high transparency. The present invention also has another object to provide a cosmetic composition containing the flaky particulate material. The present invention relates to flaky particulate material, which has an average coefficient of friction is not more than 0.50, and a total light transmittance is not less than 85%. A particle in the flaky particulate material comprises a substrate particle made of one material selected from the group consisting of mica, a synthetic mica, sericite, talc, barium sulfate and aluminum oxide. The present invention provides a flaky particulate material that gives skin excellent smoothness, a natural tone, and a matt appearance. The flaky particulate material of the present invention gives a cosmetic composition which provides great comfort of use, and an excellent appearance.

Flaky particle and cosmetic

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

The present invention provides an ultrafine barium sulfate particle, which improves, even if the particle is mixed in a water-borne composition, such as a water-borne coating composition or a water-borne ink composition, color saturation and gloss of color pigments, such as carbon black, or improve orientation of aluminum flakes or pearl pigments, which have been used in metallic coating compositions. The present invention also provides a water-borne coating composition and a water-borne ink composition, which contain the ultrafine barium sulfate particle. The present invention provides an ultrafine barium sulfate particle, comprising barium sulfate; and (1) a hydroxide and/or an oxide of at least one metallic element selected from the group consisting of Al, Si and Zr; and/or (2) a phosphate of at least one metallic element selected from the group consisting of Mg, Ca, Sr and Ba; the barium sulfate being coated with the hydroxide and/or oxide (1) and/or the phosphate (2).

Growing community of inventors

Fukushima, Japan

Hiroyuki Izumikawa