Patent ID: 7125442

Claim:
A lightfast ink composition comprising; a colorant; an aqueous medium; and at least one benzophenone derivative of formula (1) below: wherein Y 1 is one selected from the group consisting of a H, a OH, an N(R 1 )(R 2 ), a SH, and a C 1 –C 30 heteroalkyl group; each of Y 2 and Y 3 is independently selected from the group consisting of a H, a OH, an N(R 1 )(R 2 ), a SH, a substituted or unsubstituted C 1 –C 30 alkyl group, a substituted or unsubstituted C 1 –C 30 alkenyl group, a substituted or unsubstituted C 1 –C 30 alkynyl group, a substituted or unsubstituted C 1 –C 30 heteroalkyl group, a substituted or unsubstituted C 6 –C 30 aryl group, a substituted or unsubstituted C 7 –C 30 arylalkyl group, a substituted or unsubstituted C 3 –C 30 heteroaryl group, and a substituted or unsubstituted C 4 –C 30 heteroarylalkyl group; R is selected from the group consisting of a substituted or unsubstituted C 1 –C 30 alkylene group, a substituted or unsubstituted C 1 –C 30 alkenylene group, a substituted or unsubstituted C 1 –C 30 alkynylene group, a substituted or unsubstituted C 1 –C 30 heteroalkylene group, a substituted or unsubstituted C 6 –C 30 arylene group, a substituted or unsubstituted C 7 –C 30 arylenealkylene group, a substituted or unsubstituted C 3 –C 30 heteroarylene group, and a substituted or unsubstituted C 4 –C 30 heteroarylenealkylene group; X is a linker selected from the group consisting of —O—, —CO—, —NR 1 —, —N═N—, —S—, —C(═O)NR 1 —, —NR 1 C(═O)—, —SO 2 —, —SO 3 —, —COO—, —OCO—, —C(═S)—O—, —OC(═S)—, —CO—O—CO—, —CO—S—CO—, —CO—NR 1 —CO—, —C(═S)—O—C(═S)—, —C(═S)—S—C(═S)—, —C(═S)—NR 1 —C(═S)—, —O—P(═O)(OH)—O—, and —O—P(OH)—O—; Y is selected from the group consisting of a substituted or unsubstituted C 1 –C 20 alkyl group having 1 to 10 hydroxyl groups, —N(R 1 )(R 2 ), —NHN(R 1 )(R 2 ), —(CH 2 ) m —N(R 1 )(R 2 ), a substituted or unsubstituted C 2 –C 20 hydroxyalkyloxyalkyl group, a substituted or unsubstituted C 3 –C 10 lactone group, a substituted or unsubstituted C 3 –C 10 lactame group; a substituted or unsubstituted C 3 –C 30 heteroaryl group, a substituted or unsubstituted C 4 –C 30 heteroarylalkyl group, a substituted or unsubstituted C 6 –C 30 heteroarylalkenyl group, and a substituted or unsubstituted C 3 –C 10 heterocycloalkyl group; and each of R 1 and R 2 is independently one of a hydrogen atom and a C 1 –C 6 alkyl group; and m and n are independently integers from 0 to 6.