c.i. pigment red 112 with improved dispergerbarhed

摘要

Producing an uncoated, easily dispersible C.I. Pigment Red 112 by azo coupling in a microreactor, comprises precipitating a coupling component in an upstream microreactor and coupling the precipitated coupling component in a finely divided form with a diazo component in a microreactor. An independent claim is included for the uncoated C.I. Pigment Red 112 having a dispersion hardness in alkyd resin of = 45, obtained by the above method.