Catalyst for polyester polycondensation and method for producing polyester resin using the same
AssigneeMitsubishi Chemical Corporation
InventorsMichio HIGASHIJIMA, Yutaka Yatsugi, Naoki Yukita, Motohiro Munakata
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Abstract
The invention provides: a polycondensation catalyst for polyester production, which contains titanium atoms, alkaline earth metal atoms and phosphorus atoms, has high reactivity and excellent long-term storage stability, can be easily produced industrially, and has an advantage in cost; a polyester resin obtained with the catalyst; and a molded article. These are: a polymerization catalyst for polyester production containing titanium atoms, alkaline earth metal atoms and phosphorus atoms and having a specific constitution; a polyester resin obtained with the catalyst; and a molded article.
Claims9
1-9. (canceled)
A liquid polycondensation catalyst for polyester production, which is obtained by mixing an alcohol, an alkaline earth metal compound and an acid phosphoric ester compound to obtain a liquid mixture, and further mixing a titanium compound with said liquid mixture.
17-20. (canceled)
Dependencies are inferred from the claim text.