C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 75/02 (2006.01)
Patent
CA 2056332
Disclosed herein is a process for the production of a granular poly(arylene thioether) copolymer by polymerizing an alkali metal sulfide with dihalo-aromatic compounds including at least one dihalo-aromatic carboxylic acid in a polar solvent containing water. Upon the polymerization, at least a part of the dihalo-aromatic carboxylic acid is converted into an alkaline earth metal salt in advance, the hydroxide and/or oxide of an alkaline earth metal is added together with the dihalo-aromatic carboxylic acid to the polymerization reaction system, or the hydroxide and/or oxide of an alkaline earth metal is added together with an alkaline earth metal salt of the dihalo-aromatic carboxylic acid and the dihalo-aromatic carboxylic acid to the polymerization reaction system.
Hoshino Mitsuru
Katto Takayuki
Kawakami Yukichika
Kirby Eades Gale Baker
Kureha Kagaku Kogyo K.k.
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