公开(公告)号：DE19940314A1

公开(公告)日：2001-03-01

申请号：DE19940314

申请日：1999-08-25

Applicant: BASF AG

Inventor： WAGENBLAST GERHARD ,  REICHELT HELMUT ,  WIDLER GUENTHER ,  WENDLER BIRGIT ,  STANG MICHAEL ,  WOLF HEIKO ,  POLKE REINHARD

IPC: C09B67/46 ,  C09D11/328 ,  C09D11/02 ,  D06P1/00 ,  D06P5/00

Abstract: A colloid disperse dye preparation is prepared by preparation of an emulsion, which contains drops of a dye melt emulsified in a non-solvent, at elevated temperature, subjecting the emulsion to shear forces to reduce the average drop size to below 5 mu m, and cooling the emulsion below the melt temperature of the dye. Preparation of colloid disperse dye preparations comprises: (a) preparation of a crude emulsion, which contains drops of a dye melt emulsified in a non-solvent, at elevated temperature; (b) subjecting the crude emulsion to shear forces, so that the average size of the drops is reduced to below 5 mu m; and (c) cooling the resulting emulsion below the melt temperature of the dye. Independent claims are included for: (A) dye preparation obtainable by the above process; (B) dye preparation comprising dye particles which: (i) have an average particle size below 5 mu m; (ii) are spherical; and (iii) are spherical; and (C) inkjet ink which comprises a dye preparation as described in (A) or (B), optionally in combination with other auxiliaries.