p-Phenylenediamines and derivatives thereof connected by polyoxaalkyl bridges to form dimers are highly suitable developer substances in oxidation hair colors. The bridged p-phenylenediamines are represented by the general formula (I)
1
in which
(B) is a polyoxaalkyl bridge having at least two oxygen atoms;
X and Y independently of one another are H, Cl, F or a C
1
-C
4
alkyl, aminoalkyl, alkoxy, C
2
-C
4
dihydroxyalkyl, C
1
-C
4
monohydroxyalkyl or C
2
-C
4
alkenyl group; and
R1, R2, R3, and R4 independently of one another are H or a C
1
-C
4
alkyl, C
1
-C
4
monohydroxyalkyl or C
2
-C
4
dihydroxyalkyl group, and acid addition salts derived therefrom.
A process for the preparation and a method of use of the bridged p-phenylenediamines of formula (I) are also disclosed.
p-
苯二胺及其衍
生物通过聚氧烷基桥连接形成二聚体,在氧化染发剂中作为开发剂物质非常适用。桥接的p-
苯二胺由通式(I)1表示,其中(B)是具有至少两个氧原子的聚氧烷基桥;X和Y独立地为H、Cl、F或C1-C4烷基、
氨基烷基、烷氧基、C2-C4双羟基烷基、C1-C4单羟基烷基或C2-C4烯基基团;R1、R2、R3和R4独立地为H或C1-C4烷基、C1-C4单羟基烷基或C2-C4双羟基烷基团,并且可以得到其酸加成盐。还公开了制备桥接的p-
苯二胺通式(I)的方法和使用方法。