| abstract |
(57) [Summary] [Purpose] To suppress the generation of by-product fine particles due to concurrent emulsion polymerization during suspension polymerization of (meth) acrylic monomers. Further, particles of a (meth) acrylic polymer having high heat stability and small variation in particle size are obtained. [Structure] A compound in which a polymerizable monomer (A) containing a (meth) acrylic monomer as a main component is substantially insoluble in water and hardly soluble in the polymerizable monomer (A). Aqueous suspension polymerization is carried out in the presence of (B). Compound (B) As is, -SH, -S-S -, - COOH, -NO 2 And those having at least one structural unit selected from the group consisting of —OH, and particularly two or more structural units. |