TW369512B - Magnesium hydroxide slurries - Google Patents

Abstract

Magnesium hydroxide slurries having the following characteristics: (i) having a solids content of between 40-80 wt% based on the weight of the slurry with the balance being water; (ii) containing between 0.01-5.0 wt % of at least one viscosity modifying agent or dispersant based on the weight of the slurry selected from the following groups: (1) inorganic acids having a molecular weight less than 130 amu and their inorganic salts excluding H2SO4, H3PO4, silicic acid and salts having an alkali metal as sole cation; (2) low molecular weight (i.e. less than 200 amu) carboxylic acids optionally containing one or more hydroxyl groups and their inorganic salts excluding salts having alkali metal as sole cation; (3) polyhydric alcohols or carbohydrates containing two or more hydroxyl groups and having a molecular weight less than 500 amu; and (4) alkaline earth oxides and/or hydroxides; (iii) being sedimentation stable for at least 7 days without substantial agitation; and (iv) maintaining a viscosity of less than 1000 cp at a shear rate of 139 sec-1 over a period of at least seven days.