C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 63/78 (2006.01) B01J 21/02 (2006.01) B01J 27/16 (2006.01) C08G 63/82 (2006.01) C08G 63/84 (2006.01)
Patent
CA 2525365
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.
L'invention concerne un catalyseur de polymérisation destiné à la préparation de polyesters. Ce catalyseur contient, comme premier composant, un hydroxyde d'aluminium et/ou un acétate d'aluminium et, comme deuxième composant, au moins un ester phosphorique ou phosphonique. L'invention concerne également un procédé de polymérisation permettant de préparer du polytérephthalate d'éthylène à partir de térephthalate de diméthyle et d'éthylèneglycol ou d'acide térephthalique et d'éthylèneglycol respectivement par transestérification et polycondensation. L'invention concerne également l'utilisation d'hydroxyde d'aluminium et/ou d'acétate d'aluminium en association avec au moins un ester phosphorique ou phosphonique comme catalyseur de polymérisation lors de la préparation de polyesters par polycondensation ou transestérification.
Schoennagel Matthias
Turan Ahmet Celalettin
Witschas Michael
Advansa B.v.
Goudreau Gage Dubuc
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