Patent ID: 8297832
Filing Date: 2012-10-30
Classification: B01F,B01J,C08G

Abstract:
1. A process for producing a polyamide, which process comprises: directly melt polymerizing a diamine and a dicarboxylic acid in a substantial absence of solvents in a batch reaction apparatus with stirring to obtain a polyamide melt; wherein the diamine comprises 70% by mole or more of a xylylenediamine having 20% by mole or more of para-xylylenediamine, the stirring is obtained with a stirring apparatus in the batch reaction apparatus and the stirring apparatus comprises: (1) a rotating shaft connected to a driving member for stirring, (2) two or more stirring rods disposed in a substantially vertical direction which are cylinder-shaped members or plate-shaped members which move along a circumference of a circle having a center at the rotating shaft, and (3) a connecting member which connects the rotating shaft and the stirring rods; wherein