Preparation of a polyethylene phthalate or a polyethylene...

Details Preparation of a polyethylene phthalate or a polyethylene... Preparation of a polyethylene phthalate or a polyethylene...

C - Chemistry, Metallurgy

08

G

402/203

C08G 63/02 (2006.01) C08G 63/183 (2006.01) C08G 63/189 (2006.01) C08G 63/82 (2006.01)

Patent

CA 2033213

2033213 9014375 PCTABS00002 A process is disclosed for preparing a polyethylene phthalate or polyethylene naphthalate having a predetermined intrinsic viscosity which involves the direct esterification of a phthalic acid or a naphthalene dicarboxylic acid with ethylene glycol followed by the polycondensation of the esterification product using a polycondensation catalyst system containing cobalt, manganese-, and antimony-containing components.

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