Polyester composition for solar battery and method for producing same

摘要

The present invention provides a polyester composition for a solar battery, which includes a dicarboxylic acid component having terephthalic acid as a main component and a diol component having ethylene glycol as a main component, the polyester composition satisfying the following Formulae (1) to (5): 0.65≦intrinsic viscosity≦0.90 (1); 0.7≦M/P≦1.3 (2); 200 ppm≦P≦600 ppm (3); amount of terminal carboxyl groups≦15 eq/t (4); and amount of terminal methoxy groups≦10 eq/t (5) (in the Formula (2), M represents the number of moles of an alkaline metal element and/or an alkaline earth metal element per 106 g of a polyester; and P represents the number of elemental phosphorus per 106 g of a polyester).

主权项

1. A polyester composition for a solar battery, which comprises a dicarboxylic acid component having terephthalic acid as a main component and a diol component having ethylene glycol as a main component, said polyester composition comprising substantially no external particle but 0.1 to 1.0% by weight of internal particles consisting of an alkaline metal compound and/or an alkaline earth metal compound and a phosphorus compound and satisfying the following:
0.65≦intrinsic viscosity≦0.90; 0.7≦M/P≦1.3; 200 ppm≦P≦600 ppm; amount of terminal carboxyl groups≦15 eq/t; amount of terminal methoxy groups≦10 eq/t; wherein in said Formula (2), M represents the number of moles of an alkaline metal element and/or an alkaline earth metal element per 106 g of a polyester; and P represents the number of moles of elemental phosphorus per 106 g of a polyester.