Patent ID: 7279546

Claim:
A thermoplastic polyester comprising at least one moiety having at least 10 sequential units, said sequential units consisting of units selected from the group consisting of units represented by the following formula (1) and units represented by the following formula (2), wherein each of R 1 independently represents hydrogen or a substituted or unsubstituted homoalkyl or heteroalkyl group; each of R 2 independently represents hydrogen or a substituted or unsubstituted homoalkyl or heteroalkyl group; each of R 3 independently represents hydrogen or a substituted or unsubstituted homoalkyl or heteroalkyl group; each of R 4 independently represents a substituted or unsubstituted homoalkyl or heteroalkyl group; and said moiety having no fewer than 1 unit represented by formula (1) and no fewer than 1 unit represented by formula (2).