Bimetallic antimony and zirconium catalysts for preparing...

Details Bimetallic antimony and zirconium catalysts for preparing... Bimetallic antimony and zirconium catalysts for preparing...

C - Chemistry, Metallurgy

07

F

402/210, 260/428

C07F 9/90 (2006.01) C08G 63/18 (2006.01) C08G 63/83 (2006.01) C08G 63/85 (2006.01)

Patent

CA 1076128

Abstract of the Disclosure - High molecular weight, colorless polyesters suitable for shaping into filaments and films are obtained using novel catalysts selected from the group consisting of reaction products of specified antimony or zirconium (IV) compounds with 1) a carboxylate of calcium, manganese or zinc and 2) an acid anhydrlde, alcohol or glycol. The molar ratio of the antimony or zirconium compound to the aforementioned carboxylate is between 1:1 and 1:6. The catalysts are active in both transesterification and poly- condensation. The rates of these reactions are more rapid than can be achieved using prior art catalysts.

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