hidróxido de magnésio, composição de resina, e, método de produzir o hidróxido de magnésio

摘要

Magnesium hydroxide having a high aspect ratio, a production method thereof and a resin composition comprising the same. The method of producing the magnesium hydroxide having a long diameter (width) of not less than 0.5 µm and aspect ratio of not less than 10, comprising the steps of:
(A) adding an alkali to and coprecipitating it with a mixed aqueous solution of a water-soluble magnesium salt and a monovalent organic acid or a salt thereof, or
(B) adding an alkali aqueous solution to and coprecipitating it with an aqueous solution of a water-soluble magnesium salt and adding a monovalent organic acid or a salt thereof to the resulting product; and
(C) hydrothermally treating the obtained slurry at 100 °C or higher.