The present invention relates to a polyester resin whose crystallization is improved and comprises a cyclic compound represented by a following formula
A1-B-A2
(in the formula, A1 and A2 are the same or different and show groups represented by a below-described formula,
P shows a benzene ring which may be replaced by a material, and B shows a bivalent hydrocarbon group which may be replaced by a material) and polyester capable of having a crystal structure.
本发明涉及一种可改善结晶性的聚酯
树脂,该
树脂包含由下式表示的环状化合物
A1-B-A2
(式中,A1 和 A2 相同或不同,并表示由下述式子表示的基团、
P 表示可被某种材料取代的苯环,B 表示可被某种材料取代的二价烃基)和可具有晶体结构的聚酯。