Patent ID: 9714349
Date: 2017-07-25
CPC Classifications: C08J,C08K,C09D,H01L,Y02E

Claim:
1. A hydrolysis-resistant polyester film comprising a polyester resin composition, wherein the polyester resin composition that forms the film contains 0.03 to 6.7 eq/ton of hindered phenol structural units, an acid value of a polyester that forms the film is less than 25 eq/ton, an intrinsic viscosity of a polyester that forms the film is more than 0.64 dL/g and not more than 0.90 dL/g, and the polyester is polymerized using a polymerization catalyst comprising an antimony compound in combination with a calcium compound, a lithium compound, and a phosphorus compound, the polyester resin comprises Sb atoms in an amount of from 70 ppm to 400 ppm, Ca atoms in an amount of from 50 ppm to 400 ppm, Li atoms are present in an amount of from 20 ppm to 300 ppm, and P atoms in an amount of from 100 ppm to 1,000 ppm, and the polyester resin composition does not substantially contain a compound having a substituent reactive with an OH group or a carboxyl group, except an OH group and a carboxyl group.