| abstract |
(57) [Summary] [Problem] The coagulation process requires a long time, the degree of particle diameter enlargement is small, it is difficult to stop the coagulation, and the particle size changes during storage of the coagulated latex. Or a latex having a uniform particle size was not obtained. SOLUTION: A polymer latex having a small particle diameter obtained by an emulsion polymerization method having a particle diameter of 500 to 2,000Å, An emulsifier having two or more types of hydrophilic groups having different molecular structures in a molecule is added, and an acid is further added to cause coagulation, followed by neutralization with an alkali substance, thereby coagulating a monodisperse polymer latex having an average particle size of 2500 mm or more. How to let. |