INORGANIC DISPERSING AGENT, STABILIZER FOR SUSPENSION POLYMERIZATION, POLYMERIC PARTICLE, UNSATURATED POLYESTER RESIN COMPOSITION, AND TONER COMPOSITION

摘要

PROBLEM TO BE SOLVED: To obtain an inorganic dispersing agent having a high surface activity, readily deagglomerated and useful as a stabilizer for suspension polymerization. SOLUTION: This inorganic dispersing agent is characterized by comprising calcium carbonate particles satisfying (a) 0.005<=d×1<=1 (μm) [d×1 is the average particle diameter (μm) measured with an electron microphotograph], (b) 0.01<=α<=1 [αis the 50% average particle diameter (μm)] and (c) 5<=Sw1<=80 (m<2> /g) [Sw1 is the BET specific surface area (m<2> /g)].