Inexpensive physiologically tolerated oxidative hair dyeing agent - comprising 2,5-di:amino:toluene-2,6-di:amino:pyridine, resorcinol and amino-methylphenol or its deriv(s).

摘要

Developer-coupler combination based oxidative hair-dyeing agent contains 2,5-diaminotoluene as developer and (i) 2,6-diaminopyridine; (ii) resorcinol; and (iii) one or more cpds. of formula (I) as couplers, where R1 is H, F, Cl, Br or I; R2 is H, 1-4C hydroxyalkyl or 2-4C dihydroxyalkyl. In cpds. of formula (I), the methyl gp. is para- to the NHR2 gp., and R1 is ortho- or para- to the hydroxyl gp. and ortho to the NHR2 gp.. Pref. R1, R2 are H. (I) is pref. 5-amino-4-chloro- or 5-amino-4-fluoro-2-methylphenol or 3-amino-2-chloro-6-methylphenol and esp. 5-amino- or 5-((2'-hydroxyethy)-amino)- or 5-((3'-hydroxyphenol)-amino)- 2-methylphenol. The developer is pref. at least one of 1,4-diaminobenzene, 2-(2',5'-diaminophenyl)-ethanol, 4-aminophenol or 4-amino-3-methylphenol. The coupler is pref. at least one of 4-chlororesorcinol, 3-aminophenol, 5-hydroxy-1,3-dioxobenzene or 5-((2'-hydroxy)-amino)- 1,3-dioxobenzene. Agent pref. contains one of 2-amino-5-methylphenol, 2-amino-6-methylphenol or 2-amino-5-ethoxyphenol as self-coupling dye precursor. Pref. agent may contain at least one of the following direct dyes: Diamond Fuchsin (CI 42510); Basic Blue 26 (CI 44045); picramic acid; 2-((2'-hydroxyethyl)amino)- 4,6-dinitrophenol; 4-((2'-hydroxyethyl)-amino) -2-nitroaniline; Acid Brown 4 (CZ 14805); Acid Blue 135 (CI 13385); Disperse Violet 4 (CI 61105); Disperse Red 15 (CI 60710); or Disperse Violet (CI 61100). ADVANTAGE - The component materials are both cheap and physiologically well tolerated. The agent produces colours that are very stable to light, washing and chemical reagents.