| 摘要 |
It is an object of the first present invention to provide a method of producing an oil-in-water type emulsion containing an internally crosslinked fine resin particle, in which an internally crosslinked fine resin particle is encapsulated in an emulsion particle, considering the above-mentioned state of the prior art. <??>A method of producing an oil-in-water type emulsion containing an internally crosslinked fine resin particle, wherein the fine resin particle is encapsulated in a emulsion particle having an average particle diameter of 0.02 to 0.3 mu m, comprising of a step of undergoing phase transition from a water-in-oil type emulsion (Y) comprising of a resin (A) having a cationic group or an anionic group, an acid or a base (B) neutralizing 20 to 150 mole percent of the cationic group or the anionic group in the resin (A), an internally crosslinked fine resin particle (C), having an average particle diameter of 0.01 to 0.2 mu m, dispersed in an oil phase and an aqueous medium (D) to an oil-in-water type emulsion (Z) by adding the aqueous medium (D) further to the water-in-oil type emulsion (Y). |
