| 摘要 |
PURPOSE:To readily obtain the subject dispersion of fine particles by carrying out reaction by heating and stirring at a high speed is the presence of a prescribed amount of water and emulsifying and dispersing agent and then cooling the resultant dispersion in obtaining a salt from a >=8C carboxylic acid and ammonia, aluminum, etc. CONSTITUTION:A >=8C carboxylic acid (e.g. stearic acid) is reacted with ammonia and a group II metal of the periodic table or aluminum, oxide or hydroxide thereof (especially preferably magnesium oxide, zinc oxide, ammonium hydroxide, etc.) to provide an aqueous dispersion of a carboxylate. In the process, the reaction is carried out in the presence of water in an amount of 40-900 pts.wt. based on 100 pts.wt. carboxylate and an emulsifying an dispersing agent (e.g. potassium oleate) at 100-200 deg.C while being stirred at a high speed and the resultant dispersion is then cooled at <100 deg.C. Thereby, the objective aqueous dispersion of the carboxylate improved in formation of fine particles is obtained. The reaction time is short and stability of dispersion is excellent. |
