Isolierung von metallisierbaren schwarzen Monoazofarbstoffen
摘要
Metallizable black monoazo dyestuffs are obtained by spray-drying an aqueous dyestuff solution or suspension obtained in the preparation of Diamantschwarz PV or PBB (C.I. Nos. 16500 and 16505) or mixtures of these dyes without previous isolation of the dyestuffs. The solutions or suspensions are rendered acidic prior to spray-drying and preferably have a pH of 4-6. Shading dyestuffs and/or standardizing agents may be added to the aqueous solutions or suspensions or to the product obtained after spray-drying.
申请公布号
DE1469719(A1)
申请公布日期
1969.01.02
申请号
DE19651469719
申请日期
1965.03.16
申请人
FARBENFABRIKEN BAYER AKTIENGESELLSCHAFT
发明人
KURT BREIG,DR.;GERD MUELLER,DR.;WALTER BLUM,DIPL.-ING.;HANS RAAB,DR.;GUENTHER STEINMETZ,DIPL.-ING.