Process for preparing branched polycarbonate

Details Process for preparing branched polycarbonate Process for preparing branched polycarbonate

C - Chemistry, Metallurgy

08

G

C08G 64/20 (2006.01) C08G 64/14 (2006.01) C08G 64/24 (2006.01)

Patent

CA 2532081

The present invention is a process for producing branched polycarbonate providing for optimum utilization of the branching agent. It was surprisingly found that adding at least a portion of the coupling catalyst to the polymerization at a point during the oligomerization in the reaction results in a higher degree of branching and improved rheological properties.

La présente invention a trait à un procédé de production de polycarbonate ramifié assurant une utilisation optimale de l'agent de ramification. De manière inattendue, on a observé que l'ajout d'au moins une portion d'un catalyseur de couplage à la polymérisation à un point lors de l'oligomérisation dans la réaction entraîne un degré supérieur de ramification et des propriétés rhéologiques améliorées.

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