Mizusawa Industrial Chemicals, Ltd.

Kazunori Sakao

Hiroshi Igarashi

Hitoshi Ishida

Katsumi Higuchi

Yoshinobu Komatsu

Hiroshi Sawada

Akira Tatebe

Kouji Inoue

Junichi Nakajima

Hiroshi Enoki

Tetsuji Hazuma

Tooru Ueno

Alkaline earth metal basic silicate particles having a silicate of an alkaline earth metal on the surfaces of the alkaline earth metal hydroxide particles, and having an SiO/MO (M is an alkaline earth metal) molar ratio as a whole in a range of from 0.01 to 0.90. The particles are useful as a stabilizer for the chlorine-containing polymers.

Alkaline earth metal-basic silicate particle

A zinc borate having a particular crystallite size and containing very little sodium components and a method of preparing the same. The zinc borate has a particular chemical composition, has a crystallite size of not smaller than 40 nm as found from diffraction peaks of indexes of planes of (020), (101) and (200) in the X-ray diffraction image (Cu-k&agr;) and contains sodium components in amounts of not larger than 100 ppm as measured by the atomic absorptiometric method.

Zinc borate, and production method and use thereof

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Tokyo, Japan

Kazunori Sakao