Patent ID: 7173114

Claim:
A lightfast colorant that is a cinnamate derivative of formula (1) below: where Râ€² is selected from the group consisting of a halogen atom, a nitro group, a substituted or unsubstituted C 1 â€“C 20 alkyl group, a substituted or unsubstituted C 1 â€“C 20 alkoxy group, a substituted or unsubstituted C 2 â€“C 20 oxycarbonylalkyl group, a substituted or unsubstituted C 6 â€“C 18 aryl group, and a substituted or unsubstituted C 7 â€“C 19 alkylaryl group; R is selected from the group consisting of a substituted or unsubstituted C 1 â€“C 30 alkylene group, a substituted or unsubstituted C 1 â€“C 30 alkenylene group, a substituted or unsubstituted C 1 â€“C 30 alkynylene group, a substituted or unsubstituted C 1 â€“C 30 heteroalkylene group, a substituted or unsubstituted C 6 â€“C 30 arylene group, a substituted or unsubstituted C 7 â€“C 30 arylenealkylene group, a substituted or unsubstituted heteroarylene group, and a substituted or unsubstituted C 4 â€“C 30 heteroarylenealkylene group; X is a linker selected from the group consisting of â€”CONHâ€”, â€”NHCOâ€”, â€”COOâ€”, â€”OCOâ€”, â€”COâ€”, â€”SO 2 â€”, â€”SO 3 â€”, â€”Oâ€”P(â•O)(OH)â€”Oâ€”, and â€”Oâ€”P(OH) â€”Oâ€”; and Y is a colorant residue.