granular preparations and pulverulentes dyes, obtentionet applications

摘要

1461049 Dyestuff granules BAYER AG 11 April 1975 [13 April 1974] 14986/75 Heading C3P [Also in Divisions D1 and C4-C5] A dyestuff preparation in granular or pulverulent form is prepared by spraying a dispersion or solution of a dyestuff in a melt of a wax and/or a resin which is practically not soluble in water. The term dyestuff includes optical brighteners. In the examples the preparations are prepared by forming melts containing various dyestuffs, paraffin wax and a maleic acid copolymer and atomizing the melts in air using one-component and two-component nozzles.