Invention Grant
- Patent Title: Metal phthalocyanine intermediates for the preparation of polymers
- Patent Title (中): 用于制备聚合物的金属酞菁中间体
-
Application No.: US514117Application Date: 1983-09-15
-
Publication No.: US4522755APublication Date: 1985-06-11
- Inventor: Bappalige N. Achar , George M. Fohlen , John A. Parker
- Applicant: Bappalige N. Achar , George M. Fohlen , John A. Parker
- Applicant Address: DC Washington
- Assignee: The United States of America as represented by the United States National Aeronautics and Space Administration
- Current Assignee: The United States of America as represented by the United States National Aeronautics and Space Administration
- Current Assignee Address: DC Washington
- Main IPC: C08G73/00
- IPC: C08G73/00 ; C07D487/22
Abstract:
Metal 4, 4', 4", 4"'-tetracarboxylic phthalocyanines (MPTC) are prepared by reaction of trimellitic anhydride, a salt or hydroxide of the desired metal (or the metal in powdered form), urea and a catalyst. A purer form of MPTC is prepared than heretofore. These tetracarboxylic acids are then polymerized by heat to sheet polymers which have superior heat and oxidation resistance. The metal is preferably a divalent metal having an atomic radius close to 1.35.ANG..
Public/Granted literature
- US5797332A Closed loop gasification drying system Public/Granted day:1998-08-25
Information query
