Patent ID: 9080048
Filing Date: 2015-07-14
Classification: B29B,C08J,C08L,Y10T

Abstract:
1. A process of producing polymer microparticles wherein, in a system which comprises a polymer (A), a polymer (B) and an organic solvent and can cause phase separation into two phases of a solution phase mainly composed of said polymer (A) and a solution phase mainly composed of said polymer (B) when said polymer (A), said polymer (B) and said organic solvent are dissolved and mixed together, after an emulsion is formed at a temperature of 100° C., said polymer (A) is precipitated by bringing a poor solvent for said polymer (A) into contact with said emulsion, and wherein a temperature at which said poor solvent is brought into contact with said emulsion to precipitate said polymer (A) after said emulsion is formed is a temperature of a cooling crystallization temperature of said polymer (A) or higher.