Patent ID: 6855174

Claim:
A hair dye product comprising a hair dyeing composition containing at least one primary intermediate and at least one coupler and a developer composition containing one or more oxidizing agents, the hair dyeing composition containing a coupler of formula (1): wherein X is selected from the group consisting of halogen and R 5 SO 4 ; R, R 1 and R 2 are each individually selected from the group consisting of C 1 to C 22 alkyl, C 1 to C 22 mono or dihydroxyalkyl, or two of R, R 1 and R 2 together with the nitrogen atom to which they are attached form a C 3 to C 6 saturated or unsaturated ring optionally containing in the ring one or more additional hetero atoms selected from O, S and N atoms; R 3 and R 4 are each individually selected from the group consisting of C 1 to C 6 alkyl, C 1 to C 6 hydroxyalkyl, C 1 to C 6 alkoxy, C 1 to C 6 aminoalkyl or R 3 and R 4 together form a C 1 to C 5 alkylene group; and R 5 is selected from the group consisting of C 1 to C 22 alkyl and C 1 to C 22 mono and dihydroxyalkyl.