Sakai Chemical Industry Co., Ltd.

Tsutomu Yamamoto

Atsuki Terabe

Hironobu Ogata

Masaru Mikami

Masayuki Asada

Harunobu Saito

Mika Onai

Hiroaki Hamamura

Hirotaka Kawagishi

Yuji Kawasaki

The present invention relates to fine barium sulfate powder that can be readily and simply dispersed in resins or solvents; a resin composition, a coating composition, an ink composition, and a resin molded article each containing the barium sulfate powder; and a method for producing the barium sulfate powder. Provided is barium sulfate powder having a number average primary particle size of 1 to 100 nm, the powder including an organic compound on its surface, the powder in the form of compressed compact having a contact angle with distilled water of 10 to 170 degrees.

Barium sulfate powder and resin composition comprising same

Disclosed are titanium dioxide-containing composite particles which can maintain whiteness of natural titanium dioxide even after calcination step, and can provide titanium dioxide-containing composite particles having excellent weather resistance. In each of the composite particles, at least one oxide layer containing silicon oxide and zirconium oxide is provided as coating components of titanium dioxide. That is, provided are composite particles including a base that contains titanium dioxide and at least one oxide layer that contains silicon oxide and zirconium oxide provided on the base, and a method of producing the composite particles.

Composite particles and method for production thereof

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Iwaki, Japan

Tsutomu Yamamoto