Patent ID: 11879097
Assignee: TOKUYAMA CORPORATION
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 1:
2. The photochromic compound according to claim 1, wherein R5 and R6 may together form, along with the 13-positioned carbon atom in the indenonaphthopyran moiety to which they bond, an aliphatic ring having 3 to 20 ring carbon atoms, a condensed polycyclic ring formed by condensation of the aliphatic ring with an aromatic ring or an aromatic hetero ring, a hetero ring having 3 to 20 ring atoms, or a condensed polycyclic ring formed by condensation of the hetero ring with an aromatic ring or an aromatic hetero ring; and these rings may have a substituent;
the substituent may be the oligomer chain group A, the alkenyl group having 10 to 30 carbon atoms, or a group having an alkenyl group having 10 to 30 carbon atoms at the terminal thereof.