Patent ID: 7637963

Claim:
A polymeric leuco colorant selected from the group consisting of Structure I and Structure II as shown below: wherein R 1 and R 2 are the same, wherein R 3 and R 4 are the same; and wherein R 5 and R 6 are the same; and R 1 and R 2 are selected from H, alkyl, aryl, or alkyl-aryl wherein the terminal group is selected from hydroxide, C 1 -C 18 alkyl ester, and an amino substituted with H, C 1 -C 18 alkyl, alkyleneoxide residue, or ammonium quaternary salts derived from alkylation of the amino substituted structure; R 3 and R 4 are selected from polyalkylene oxide, or glycidylether-polyalkylene oxide wherein the terminal group is selected from hydroxide, C 1 -C 18 alkyl ester, and an amino substituted with H, C 1 -C 18 alkyl, alkyleneoxide residue, or ammonium quaternary salts derived from alkylation of the amino substituted structure; and R 5 and R 6 are selected from H, alkyl, or halogen.