Tateho Chemical Industries Co., Ltd.

Toshikazu Kodani

Hirofumi Kurisu

Atsuya Kawase

Ryuichi Ishibashi

Mareshi Takegaki

Takashi Oki

A metal hydroxide solid solution and a metal oxide solid solution, wherein the crystal form is an octahedron comprising upper and lower parallel basal planes and six peripheral pyramidal planes, the pyramidal planes consisting of upward-inclined planes and downward-inclined planes which are alternatively located. The ratio of the major axis diameter of the basal plane to the thickness between the upper and lower basal planes (major axis diameter/thickness) if,to,This improves fluidity, processability and the like when the solid solutions are kneaded into resins and the like.

Metal hydroxide solid solution, metal oxide solid solution and processes for their production

A composite metal hydroxide is produced by reacting magnesium-containing aqueous solution (X) including water soluble zinc compound wherein magnesium ion concentration is 0.01 to 1 mol/liter with alkaline material (Y) at a specific reaction equivalent ratio. Further, a composite metal hydroxide represented by the following general formula (1) is produced by hydrothermally treating thus obtained composite metal hydroxide within a temperature range of 100.degree. to 200.degree. C. for aging in chlorine-containing aqueous solution having a specific chlorine ion concentration:

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Hyogo, Japan

Toshikazu Kodani