| 摘要 |
NEW MATERIAL:Pyrazole monoazo compounds of formula I , wherein R is lower alkyl, phenoxyalkyl, alkoxyalkyl, or aralkyl. EXAMPLE:Compd. of formula II. USE:Dyes which dye polyester fibers yellow with good alkaline resist-discharge printability and particularly with heat resistance and excellent fastness to wetting such as washing, perspiration and water after after-treatment with polyurethane. PREPARATION:An aniline compd. of formula III is diazotized and then coupled with an amine of formula IV (wherein R is as defined above) to produce a compd. of formula I .
|
