| 摘要 |
A process for producing polymer microparticles, characterized in that, in a system which comprises a polymer (A), a polyvinyl alcohol group and an organic solvent and can cause the phase separation into two phases of a solution phase mainly composed of the polymer (A) and a solution phase mainly composed of the polyvinyl alcohol when the polymer (A), the polyvinyl alcohol group and the organic solvent are dissolved and mixed together, the polymer (A) is precipitated by heating the system at 100°C or higher to form an emulsion and thereafter bringing a poor solvent for the polymer (A) into contact with the emulsion; and polymer microparticles produced by the process. It becomes possible to produce microparticles of various types of polymers including a highly heat-resistant polymer stably at a high quality, and it becomes possible to produce microparticles having a small particle diameter distribution stably in a simple manner. Particularly, the microparticles of the present invention can be used as a material suitable for the concavo-convex formation on a reflector that is used in a thin liquid crystal display. |
