C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 63/82 (2006.01) C08K 5/523 (2006.01) C08G 63/85 (2006.01)
Patent
CA 2483897
The invention concerns new catalyst systems for the synthesis of polyesters, for instance for the manufacture of polyethylene terephthalate and its copolyesters. The catalyst system according to the invention consists of an antimony or germanium compound, a heterogeneous catalyst component and an ester of phosphoric acid or of phosphorous acid as stabilizer. The polycondensation rate both in the liquid phase and in solid phase polycondensation (solid state) can be increased by 30-100 percent with the smallest additions of the heterogeneous component.
L'invention concerne de nouveaux systèmes catalyseurs permettant la synthèse de polyesters, par exemple la production de polyéthylène téréphtalate et de ses copolyesters. Ce système catalyseur contient un composé d'antimoine ou de germanium, un constituant catalyseur hétérogène et un ester d'acide phosphorique ou d'acide phosphoreux comme stabilisant. Le taux de polycondensation à la fois en phase liquide et en phase solide (état solide) peut être augmenté de 30 à 100 % avec les plus petites additions de constituant hétérogène.
Feix Gunter
Runkel Dietmar
Staeuber Hans
Voerckel Volkmar
Wiegner Jens-Peter
Equipolymers Gmbh
Smart & Biggar
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