Patent ID: 11897894
Assignee: TRANSITIONS OPTICAL, LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  G | IPC C  G

Claim 11:
12. The indolenaphthopyran of according to claim 8, wherein each the mesogen-containing group L1, at one or more of positions 9, 10, 11, or 12, is independently represented by the following Formula (II),

—[S1]c—[Q1—[S2]d]d′—[Q2—[S3]e]e′—[Q3—[S4]f]f′—R  Formula (II), wherein,
(a) Q1, Q2, and Q3 for each occurrence, are independently a divalent group selected from the group consisting of unsubstituted aryl, substituted aryl, unsubstituted cycloalkyl, and substituted cycloalkyl;
wherein the aryl substituents and cycloalkyl substituents are each independently selected from the group consisting of liquid crystal mesogens, halogen, alkyl, alkoxy, alkylamino, dialkylamino, alkylthio, alkoxycarbonyl, alkylcarbonyl, alkoxycarbonyloxy, aryloxycarbonyloxy, perfluoroalkyl, and perfluoroalkoxy;
(b) c, d, e, and f are each independently an integer of 0 to 3; and each S1, S2, S3 and S4 is independently chosen for each occurrence from a spacer unit selected from the group consisting of:
(i) —C(Z)2—, —N(Z)—, —C(Z)═C(Z)—, —C(Z)═N—, wherein Z for each occurrence is independently selected from the group consisting of hydrogen, alkyl, and aryl;
(ii) Si(CH3)2—, —Si(CH3)2O—; and
(iii) —O—, —C(═O)—, —C≡C—, —N═N—, —S—, —S(═O)—, —(O═)S(═O)—, —(O═)S(═O)O—, —O(O═)S(═O)O—

provided that when two spacer units comprising heteroatoms are linked together the spacer units are linked so that heteroatoms are not directly linked to each other;
(c) R is alkyl; and
(d) d′, e′ and f′ are each independently 0, 1, 2, 3, and 4, provided that the sum of d′+e′+f′ is at least 1.