Patent ID: 8623990

Claim:
A polyester resin composition comprising a compound represented by the following formula (1) and a polyester resin: wherein each of R 1a , R 1b , R 1c , R 1d and R 1e independently represents a hydrogen atom or a monovalent substituent excluding OH, at least one substituents represents a substituent having a positive Hammett's σp value, and substituents may combine with each other to form a ring; and each of R 1g , R 1h , R 1i , R 1j , R 1k , R 1m , R 1n and R 1p independently represents a hydrogen atom or a monovalent substituent, and substituents may combine with each other to form a ring, and wherein the polyester resin is at least one member selected from the group consisting of polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, poly-1,4-cyclohexanedimethylene terephthalate, and polyethylene-1,2-diphenoxyethane-4,4′-dicarboxylate.