fluorene compound, a stabilizing agent of synthetic polymers containing the fluorene compound, and I containing the fluorene compound composition

摘要

Disclosed are: a novel fluorene compound which is capable of providing an organic material such as a polymer with high processing stability, high heat resistance and long life without using a secondary antioxidant; a stabilizer which contains the fluorene compound; and a composition which contains an organic material and the compound. Specifically disclosed is a fluorene compound which is characterized by being represented by formula (I). (In the formula, Y1 represents -C(=O)-O-, -C(=O)-NH- or the like; X1-X8 each represents a hydrogen atom or the like; a represents 0 or 1, provided that a represents 0 when b or d is 0; A represents a group represented by formula (A1) or (A2) (wherein G1 and G2 each represents a divalent organic group having 1-20 carbon atoms, or the like; b represents 0 or 1; c represents an integer of 1-3; d represents 0 or 1; Y2 and Y3 each represents a chemical single bond or the like; and X9-X21 each represents a hydrogen atom or the like).)