申请人:——
公开号:US20040231557A1
公开(公告)日:2004-11-25
This invention relates to azo pigments of general formula (I) wherein D represents the radical of a diazo component; R
1
and R
2
are the same or different and represent hydrogen, a C
1
-C
4
alkyl radical which is optionally substituted by hydroxy, amino, halogen or methoxy, or a (C
6
-C
10
) aryl radical which is optionally substituted by one, two or three substituents from the group C
1
-C
4
alkyl, C
1
-C
4
alkoxy, F, Cl, Br, CF
3
, NO
2
, OH, CONH
2
, CONH(C
1
-C
4
alkyl), CON(C
1
-C
4
alkyl)
2
, COO(C
1
-C
4
alkyl), SO
2
NH
2
, SO
2
NH(C
1
-C
4
alkyl) and SO
2
N(C
1
-C
4
alkyl)
2
, provided that R
1
and R
2
do not simultaneously represent hydrogen; R
4
represents hydrogen, C
1
-C
4
alkyl, halogen, trifluoromethyl, C
1
-C
4
alkoxy, NO
2
, or CN; and n represents 1, 2 or 3.