Title:
ポリアミドおよび他の縮合ポリマーの分子量を増加する方法
Document Type and Number:
Japanese Patent JP3619253
Kind Code:
B2
Abstract:
This invention concerns a process for increasing the molecular weight and viscosity of polyamides and other condensation polymers, by first injecting an inert gas into the polymer melt at elevated pressure, then stripping the volatiles from the polymer through the application of reduced pressure, followed by holding the polymer at elevated temperatures long enough for the reaction to occur. Activators may be added to the polymer. Port areas used in the stripping zone, may be kept hot for continuous operation.
Inventors:
Anoric, choline
Clammer, Gregory, Douglas
Dujari, Lambdas
Lee, Win-Chan
Lao, Thunder, Mohan
Welland, Robert, Clayton
Clammer, Gregory, Douglas
Dujari, Lambdas
Lee, Win-Chan
Lao, Thunder, Mohan
Welland, Robert, Clayton
Application Number:
JP52359595A
Publication Date:
February 09, 2005
Filing Date:
March 07, 1995
Export Citation:
Assignee:
E.I.du Pont de Nemours & Company
International Classes:
C08G69/04; C08G63/78; C08G63/83; C08G63/87; C08G63/88; C08G69/00; C08G69/28; C08G85/00; (IPC1-7): C08G85/00; C08G63/78; C08G69/04
Domestic Patent References:
| JP62079225A | ||||
| JP52090594A | ||||
| JP4500080A |
Foreign References:
| WO1992010526A1 |
Attorney, Agent or Firm:
Yoshikazu Tani
Kazuo Abe
Kazuo Abe