C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 75/23 (2006.01)
Patent
CA 2654804
The present invention relates to a process for preparation of polysulphones with Yellowness Index to DIN 6167 smaller than 19 and of polyether sulphones with Yellowness Index to DIN 6167 smaller than 30, characterized in that the polymerization reaction is carried out in basic, aprotic solvents, using a mechanical agitator which passes close to the wall. The present invention also relates to the polyether sulphones and polysulphones obtainable for the first time by this process, and to the use of these polymers for production of mouldings, foils, membranes and foams.
La présente invention concerne un procédé de fabrication de polysulfones ayant un indice de jaune selon DIN 6167 inférieur à 19 et de polyéthersulfones ayant un indice de jaune selon DIN 6167 inférieur à 30, caractérisé en ce que la polymérisation est réalisée en solvants basiques et aprotiques, en utilisant un agitateur forçant le déplacement, à proximité de la paroi. La présente invention concerne également les polysulfones et polyéthersulfones obtenues pour la première fois par ce procédé, ainsi que l'utilisation de ces polymères pour la fabrication de corps moulés, de feuilles, de membranes et de mousses.
Dienes Christian
Erbes Joerg
Krueger Marco
Lange Gerhard
Muessig Stefan
Basf Se
Robic
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