C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 73/08 (2006.01) C08G 79/04 (2006.01) C08J 5/00 (2006.01) C08J 5/18 (2006.01) C09D 179/00 (2006.01)
Patent
CA 2654118
The invention concerns a method for the synthesis of a polyoxadiazole polymer in a one-step polycondensation reaction of a hydrazine sulfate salt with dicarboxylic acids or their derivatives in polyphosphoric acid. The invention further concerns a corresponding polyoxadiazole polymer as well as uses of a corresponding polyoxadiazole polymer. The method according to the invention is characterized by the following steps performed: - heating the polyphosphoric acid to a temperature of at least 160 °C, - making a solution by mixing the hydrazine sulfate salt with one or more dicarboxylic acids or their derivatives in the heated polyphosphoric acid, - heating the solution under an inert gas atmosphere, - precipitating the polymer in a basic solution.
de Figueiredo Gomes Dominique
Loos Marcio Rodrigo
Gkss-Forschungszentrum Geesthacht Gmbh
Gowling Lafleur Henderson Llp
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