abstract |
(57) [Summary] [Structure] At least one abietic acid selected from a compound represented by the following formula (IA) and a metal salt thereof, and a compound represented by the following formula (IB) and a metal salt thereof. A crystal nucleating agent for polyester, characterized by comprising a compound (In the formula, R 1 , R 2 and R 3 represent a hydrogen atom, an alkyl group, a cycloalkyl group or an aryl group and may be the same or different). [Effect] The rate of crystallization of polyester can be improved, and a molded product having excellent mechanical properties can be obtained. |