Patent ID: 9169349
Filing Date: 2015-10-27
Classification: C08G,H01L,Y02E

Abstract:
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 10 P represents the number of moles of elemental phosphorus per 10