| abstract |
(57) [Summary] [Structure] 1 to 30% by weight of an ester-forming sulfonic acid alkali metal salt compound and 1 part of an ether bond-containing dicarboxylic acid or ester-forming derivative based on polyester. Modified polyesters and films containing .about.20% by weight and 0.1 to 15% by weight of polyoxyalkylene glycol. [Effect] A modified polyester and a film having excellent adhesiveness, transparency, and curl curl recovery property, which are suitable for photographic support, packaging, general industry, magnetic tape, etc. Can be used. |