| abstract |
PURPOSE: The titled fine resin particles having improved dispersion stability and high crosslinking degree and particularly stability without depending on pH, by containing a compound having betaine structure in a polymerizable monomer, etc., having polymerizable unsaturated group. n CONSTITUTION: Fine resin particles, obtained by emulsion polymerizing a monomer composition prepared by containing (C) monofunctional polymerizable unsaturated group, as necessary, in (A) a polymerizable monomer having at least 2 radically polymerizable unsaturated groups and/or (B) a polymerizable monomer having one radically polymerizable monomer with (D) a betaine compound, e.g. a compound expressed by formulas IWIII (R 1 is H or methyl; R 2 and R 3 are 1W6C alkyl; R 4 is H or 1W3C alkyl; A is -O- or -NH-; n is 1W6; m 1 is 1W12; m 2 is 0 or 1W6; X - is SO 3 - or CO 2 - ), and having preferably 0.01W0.6μ average particle diameter. n COPYRIGHT: (C)1987,JPO&Japio |