C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/358
C08G 65/40 (2006.01) C08G 65/48 (2006.01)
Patent
CA 1257740
PREPARATION OF POLY(ARYL ETHER KETONES) IN THE PRESENCE OF AN ALKAI OR ALKALINE EARTH METAL SALT ABSTRACT OF THE DISCLOSURE Described herein is an improved process for preparing poly(aryl ether ketones) by a nucleophilic displacement polycondensation reaction wherein the improvement comprises adding an alkali or alkaline earth metal salt to the polycondensation reaction, to control the molecular weight of the poly(aryl ether ketones). Thus the specification discloses a process for preparing poly(aryl ether ketones) by nucleophilic displacement polymerization in the presence of at least one alkali metal base selected from potassium, rubidium or cesium, and fluoride ions, which comprises adding to the polymerization an effective amount of at least one metal salt selected from lithium, sodium, alkaline earth or lanthanide chloride, bromide, iodide, sulfate, alkyl or aryl carboxylate, cyanide, borate or phosphate to slow or stop advancement of molecular weight. S P E C I F I C A T I O N
516553
Gowling Lafleur Henderson Llp
Solvay Advanced Polymers L.l.c.
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