SILICATE SLURRY WITH HIGH FLUIDITY AND SUSPENSION STABILITY

PURPOSE:A small amount of crosslinked polymer of a carboxyl type monomer is added to an aqueous slurry of a silicate to give the titled slurry which is easy to handle as a detergent or its starting material. CONSTITUTION:An aqueous slurry containing 30-50wt% (calculated as anhydride) of fine particles of silicates is combined with a crosslinked polymer of a carboxyl type monomer. The polymer means an electrolytes with a high- molecular chain which has carboxyl groups and is crosslinked in branched chains. Since the polymer becomes acidic, when dissolves in water, e.g., an aqueous slurry of a synthetic zeolite, which is high in alkalinity, may be added directly, or it is neutralized with an alkali such as sodium or potassium hydroxide or an amine, then added to the slurry. The amount of the polymer added depends upon the apparent viscosity of the desired aqueous slurry and particle size of the silicate salt, however, it is preferred to be mixed in an amount of 0.01-0.3wt%.