POLYMERIZATION CATALYST FOR PREPARING POLYESTERS, PREPARATION OF POLYETHYLENE TEREPHTHALATE AND USE OF POLYMERIZATION CATALYST

The invention relates to a polymerization catalyst for preparing polyesters. The catalyst containsaluminium hydroxide and/or aluminium acetate as a first component and at least one phosphoric or phosphonic ester as a second component. The invention also relates to a polymerization process for prepar...

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Bibliographische Detailangaben
Hauptverfasser:	TURAN AHMET CELALETTIN, SCHOENNAGEL MATTHIAS, WITSCHAS MICHAEL
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	The invention relates to a polymerization catalyst for preparing polyesters. The catalyst containsaluminium hydroxide and/or aluminium acetate as a first component and at least one phosphoric or phosphonic ester as a second component. The invention also relates to a polymerization process for preparing polyethylene terephthalate from dimethyl terephthalate and ethylene glycol or terephthalic acid and ethylene glycol by transesterification and polycondensation respectively. The invention further relates to the use of aluminium hydroxide and/or aluminium acetate in combination with at least one phosphoric or phosphonic ester as polymerization catalyst when preparing polyesters by polycondensation or transesterification.