Patent ID: 7064169
Filing Date: 2006-06-20
Classification: C08J,C08L

Abstract:
1. A polyester resin composition (C) consisting essentially of polyester resin (A), which comprises at least one of polyester resin (m) comprising a dicarboxylic acid unit comprising 2 to 50% by mole of a dicarboxylic acid unit having a cyclic acetal structure and a diol unit having no cyclic acetal structure and polyester resin (n) comprising a diol unit comprising 1 to 49% by mole of a diol unit having a cyclic acetal structure and a dicarboxylic acid unit comprising 1 to 49% by mole of a dicarboxylic acid unit having a cyclic acetal structure, and polyester resin (B) having no cyclic acetal structure, wherein a sum of a fraction of the dicarboxylic acid unit having a cyclic acetal structure in an entire dicarboxylic acid unit and a fraction of the diol unit having a cyclic acetal structure in an entire diol unit in polyester resin composition (C) is 0.05% by mole or greater, and wherein the dicarboxylic acid unit having a cyclic acetal structure in polyester resin (A) is a dicarboxylic acid unit derived from a dicarboxylic acid represented by general formula (3): wherein R 4 and R 5 each independently represent a characteristic group selected from a group consisting of acyclic hydrocarbon groups having 1 to 10 carbon atoms, alicyclic hydrocarbon groups having 3 to 10 carbon atoms and aromatic hydrocarbon groups having 6 to 10 carbon atoms and R 6 and R 7 each independently represent hydrogen atom, methyl group, ethyl group, or isopropyl group, or a dicarboxylic acid represented by generat formula (4): wherein R 3 represents a characteristic group selected from a group consisting of acyclic hydrocarbon groups having 1 to 10 carbon atoms, alicyclic hydrocarbon groups having 3 to 10 carbon atoms and aromatic hydrocarbon groups having 6 to 10 carbon atoms, and R 4 , R 6 and R 7 are as defined above.