The present invention claims dyestuffs of formula (I), wherein D, R
1
to R
7
and n are defined as given in claim
1
, a process for their preparation and their use.
A disperse monoazo dye of the formula:
wherein each of R and R³ represents a lower alkyl radical,
R¹ represents a lower alkyl or C₃-C₆ alkenyl radical and
R² represents a C₂-C₆ alkyl radical carrying a hydroxy or acyloxy substituent.
Disperse dyes, free from sulphonic or carboxylic acid groups
申请人:ZENECA LIMITED
公开号:EP0588489A1
公开(公告)日:1994-03-23
Disperse monoazo dyes, free from sulphonic or carboxylic acid groups, which are of the formula :
wherein
R1, R2 and R3 each independently is lower alkyl ;
R4 is hydrogen or optionally substituted lower alkyl ; and
R5 represents optionally substituted lower alkyl.
The dyes have excellent dyeing characteristics and produce bluish-green shades of high fastness on synthetic textile materials.