| abstract |
The present invention relates to a novel composite metal oxide catalyst and a method for producing a polyester using the same. According to the metal-bonded compound of the present invention, it has higher catalytic activity than the antimony catalyst and the conventional titanium catalyst, is easy to synthesize, stable, and shows sufficient polymerization activity in a small amount, and can be used as an environmentally friendly polyester polymerization catalyst. In addition, when the polyester is manufactured using the composite metal oxide of the present invention, there is no deterioration in catalytic activity due to phosphorus (P), which is a thermal stabilizer used to reduce thermal decomposition during hot melt molding. Since phosphorus can be used in excess of the existing, less pyrolysis occurs, yellowing phenomenon is reduced and high viscosity can be maintained. Therefore, the present invention can be usefully applied to the production of polyesters having good physical properties, particularly polyethylene terephthalate. |