FLUORINE-CONTAINING COPOLYMER, OPTICAL RESIN COMPOSITION, AND OPTICAL RESIN MOLDED BODY

The fluorine-containing copolymer according to the present invention contains: structural unit (A) represented by formula (1); and at least one selected from the group consisting of structural unit (B) represented by formula (2), structural unit (C) represented by formula (3), and structural unit (D) represented by formula (4). (In formula (1), Rff 1-Rff 4 each independently represent a fluorine atom, a perfluoroalkyl group having 1-7 carbon atoms, or a perfluoroalkyl ether group having 1-7 carbon atoms. Rff 1 and Rff 2 may be linked with each other to form a ring.) (In formula (2), R1-R3 each independently represent a fluorine atom or a perfluoroalkyl group having 1-7 carbon atoms. R4 represents a perfluoroalkyl group having 1-7 carbon atoms. The perfluoroalkyl group may have a ring structure. A portion of the fluorine atoms may be substituted with a halogen atom other than a fluorine atom. A portion of the fluorine atoms in the perfluoroalkyl group may be substituted with a halogen atom other than a fluorine atom.) (In formula (3), R5-R8 each independently represent a fluorine atom or a perfluoroalkyl group having 1-7 carbon atoms. The perfluoroalkyl group may have a ring structure. A portion of the fluorine atoms may be substituted with a halogen atom other than a fluorine atom. A portion of the fluorine atoms in the perfluoroalkyl group may be substituted with a halogen atom other than a fluorine atom.) (In formula (4), Z represents an oxygen atom, a single bond, or -OC(R19R20)O-, and R9-R20 each independently represent a fluorine atom, a perfluoroalkyl group having 1-5 carbon atoms, or a perfluoroalkoxy group having 1-5 carbon atoms. A portion of the fluorine atoms may be substituted with a halogen atom other than a fluorine atom. A portion of the fluorine atoms in the perfluoroalkyl group may be substituted with a halogen atom other than a fluorine atom. A portion of the fluorine atoms in the perfluoroalkoxy group may be substituted with a halogen atom other than a fluorine atom. s and t each independently represent 0-5 and s+t equals an integer of 1-6 (however, when Z represents -OC(R19R20)O-, s+t may be equal to 0).) La présente invention concerne un copolymère contenant du fluor qui contient : un motif structural (A) représenté par la formule (1); et au moins un motif structural choisi dans le groupe constitué par le motif structural (B) représenté par la formule (2), le motif structural (C) représenté par la formule (3) et le motif structural (D)