| abstract |
A β-crystal nucleating agent capable of forming a β-crystal structure in a crystalline resin is provided. The A β crystal nucleating agent, phenolic compounds, phenolic compounds having a fluorene skeleton [e.g., 9,9-bis (mono- to tri-hydroxyphenyl) fluorene, 9,9-bis (mono- or di-C 1- 4- alkyl-hydroxyphenyl) fluorene and the like]. A β crystal structure can be formed in the crystalline resin by melt-mixing such a β crystal nucleating agent and a crystalline resin (particularly, an aliphatic polyester resin such as polylactic acid). [Selection figure] None |