Novel coupling components
Keratinic fibers, especially human hair are dyed by an agent containing a coupling component which is an m-phenylenediamine derivative of the formula wherein R 1 is a C 1-4 alkyl group or a C 1-4 monohydroxy alkyl group, R 2 is a hydrogen atom, a methyl or an ethyl group and each of R 3 and R 4 is independently a branched or linear C 2-6 hydroxyalkyl group, with the proviso that the R 1 O group is in the ortho or meta position to both amino groups; and a cosmetically acceptable carrier. These agents afford desired color nuances in a sufficient intensity and fastness, exhibit good fiber affinity and are safe from a toxicological and dermatological point of view.
1 . An agent for dyeing keratinic fibers, especially human hair, comprising a coupling component which is an m-phenylenediamine derivative of the formula (I)
wherein R 1 is a C 1-4 alkyl group or a C 1-4 monohydroxy alkyl group, R 2 is a hydrogen atom, a methyl or an ethyl group and each of R 3 and R 4 is independently a branched or linear C 2-6 hydroxyalkyl group, with the proviso that the R 1 O group is in the ortho or meta position to both amino groups; and a cosmetically acceptable carrier.
2 . The agent of claim 1 wherein R 3 and R 4 are the same.
3 . The agent of claim 1 wherein each of R 3 and R 4 is a 2-hydroxyethyl group.
4 . The agent of claim 1 wherein R 1 is a methyl group.
5 . The agent of claim 1 wherein R 2 is a methyl group.
6 . The agent of claim 1 wherein R 1 O is in the ortho position to both amino groups.
7 . The agent of claim 1 wherein the m-phenylenediamine derivative of Formula (I) is 2,6-bis-((2-hydroxyethyl)amino)-anisole or 2,6-bis-((2-hydroxyethyl)amino)-4-methylanisole.
8 . The agent of claim 1 wherein R 1 O is in the meta position to both amino groups.
9 . The agent of claim 1 further comprising at least one developer component.
10 . The agent of claim 1 further comprising at least one substantive dye.
11 . The agent of claim 10 wherein the substantive dye is cationic.
12 . A method for dyeing keratinic fibers comprising applying to keratinic fibers an agent in accordance with claim 1 and washing off the applied agent after a period of action.
13 . An m-phenylenediamine derivative of the Formula (I)
wherein R 1 is a C 1-4 alkyl group or a C 1-4 monohydroxy alkyl group, R 2 is a hydrogen atom, a methyl or an ethyl group and each of R 3 and R 4 is independently a branched or linear C 2-6 hydroxyalkyl group, with the proviso that the R 1 O group is in the ortho or meta position to both amino groups
14 . A biscarbamate selected from the group consisting of bis(2-chloroethyl)(2-methoxy-5-methyl-1,3-phenylene) biscarbamate and bis(2-chloroethyl)(2-methoxy-1,3-phenylene) biscarbamate.
15 . A bis(1,3-oxazolidin-2-one) selected from the group consisting of 3,3′-(2-methoxy-5-methyl-1,3-phenylene)bis(1,3-oxazolidin-2-one) and 3,3′-(2-methoxy-1,3-phenylene)bis (1,3-oxazolidin-2-one).