Patent ID: 8476381
Filing Date: 2013-07-02
Classification: C08G

Abstract:
1. A polyester resin (PE) produced via reaction of a crystalline polyoxyalkylene polyol, and a polycarboxylic acid (F), the crystalline polyoxyalkylene polyol having a number average molecular weight of 500 to 20,000 and produced by a method comprising: performing ring-opening polymerization of an alkylene oxide (a) with a salen complex used as a catalyst (B) in a condition that an amount of the salen complex is 6 to 100 parts by weight with respect to 100 parts by weight of said alkylene oxide (a), the salen complex being represented by the formula (1): wherein R R M represents a metal atom belonging to any one of groups III to XIII; L represents a ligand; n represents an integer of 1 or 2, and when n is 2, one ligand L of two Ls may be the same as or different from the other, wherein R R