公开(公告)号：CA2940665A1

公开(公告)日：2015-10-22

申请号：CA2940665

申请日：2015-04-09

Applicant: BASF SE

Inventor： GRANT WILLIAM E ,  SWANNER GLENN B ,  NOON ERIC S ,  ORTIZ CESAR G ,  FLACK JOSEPH T ,  GRUETZNER ROLF-EGBERT

IPC: C08G69/16 ,  C08G69/46

Abstract: A method produces a polyamide having an extractable fraction of oligomer of from 2 to 10 percent. The method includes introducing a monomer into a reactor and polymerizing the monomer to form a first intermediate having an extractable fraction of oligomer of greater than 10 percent, wherein the oligomer is a compound of 2 to 20 units of the monomer. The method includes transferring the first intermediate from the reactor into an extractor and introducing water into the extractor to form a second intermediate having an extractable fraction of oligomer that is less than the extractable fraction of the first intermediate, wherein the water is introduced at a temperature of less than 100°C and wherein the water includes 0.1 to 3.0 weight percent of a plasticizer. Moreover, the method includes transferring the second intermediate into a dryer and applying air at a temperature of less than 125°C.