Magnesium hydroxide and process for its production.

摘要

Magnesium hydroxide of a fine plate-like particle form having an average particle size (<Image id="ia01" he="5" wi="4" file="IMGA0001.TIF" imgContent="character" imgFormat="TIFF" inline="yes" />) of from 0.2 to 0.8 µm as measured by a light transmission type liquid phase sedimentation method, wherein the proportion of particles having a particle size of<Image id="ia02" he="5" wi="5" file="IMGA0002.TIF" imgContent="character" imgFormat="TIFF" inline="yes" /> + 0.5 µm or larger is not higher than 50% by weight based on the weight of the total particles, and the particle thickness distribution is such that the proportion of particles having a thickness of 0.05 µm or less is not higher than 5% by number and the proportion of particles having a thickness of 0.2 µm or more is not higher than 20% by number.