Novel coupling components
AssigneeHenkel Kommanditgesellschaft auf Aktien (Henkel KGaA)
InventorsGeorge Knuebel, Horst Hoeffkes, Ralph Nemitz
Life of this patent
Estimating the term…
Abstract
Keratin fibers are colored by an agent comprising a coupler which is a m-phenylenediamine derivative of the formula (I) wherein R1 is a C1-C4 alkyl group or a C1-C4 monohydroxyalkyl group; R2 is a methyl or an ethyl group; each of R3 and R4 is independently a branched or unbranched C2-C6 hydroxyalkyl group; and a cosmetically acceptable carrier. These couplers exhibit improved toxicological and dermatological properties and permit hair colorations in a broad color spectrum with good fastness properties.
Claims15
An agent for coloring keratin fibers comprising a coupler which is a m-phenylenediamine derivative of the formula (I)
- wherein R1 is a C1-C4 alkyl group or a C1-C4 monohydroxyalkyl group;
- R2 is a methyl or an ethyl group;
- each of R3 and R4 is independently a branched or unbranched C2-C6 hydroxyalkyl group;
- and a cosmetically acceptable carrier.
An m-phenylenediamine derivative of the formula (I)
- wherein R1 is a C1-C4 alkyl group or a C1-C4 monohydroxyalkyl group;
- R is a methyl or an ethyl group;
- and each of R3 and R4 is independent of one another, a branched or unbranched C2-C6 hydroxyalkyl group.
2,4-Bis[(2-hydroxyethyl)amino]-6-methylanisole.
Bis(2-chloroethyl) (4-methoxy-5-methyl-1,3-phenylene)biscarbamate.
3,3′-(4-Methoxy-5-methyl-1,3-phenylene)bis(1,3-oxazolidin-2-one).
Dependencies are inferred from the claim text.