Title:
顔料の造粒
Document Type and Number:
Japanese Patent JP4108757
Kind Code:
B2
Abstract:
The invention relates to a process for preparing organic pigment granules with a particular particle size wherein an organic pigment with a particle size of 0.01 to 10 mum is mixed with water, a C1-C4alcohol, a C3-C8ketone or a mixture thereof, a binder and ammonia or a C1-C3amine and an emulsifier. This mixture is pressed in a continuously operating apparatus through one or more apertures each having a size of 0.2-5.0 mm2, the apparatus consisting of at least one conveying device and a shaping section comprising the apertures, and being constructed, and operated with a throughput, such that the pressure in its shaping section does not exceed 10 bar. The granulated product is then dried at a temperature of -50 to 200° C. at atmospheric pressure or under reduced pressure. The invention also relates to pigment granules prepared by the process of the invention, with a particle size of 0.5 to 4 mm, wherein the pigment present essentially has a particle size from 0.01 to 10mum.
Inventors:
Barrio, Paolo
Bruker, Holst Olaf
Bruker, Holst Olaf
Application Number:
JP51890298A
Publication Date:
June 25, 2008
Filing Date:
October 10, 1997
Export Citation:
Assignee:
Ciba Specialty Chemicals Holding Inc.
International Classes:
C09B67/20; C09B57/00; C09B67/00; C09B67/02; C09B67/08; C09B67/10; C09B67/42
Domestic Patent References:
| JP62161861A | ||||
| JP49054429A |
Attorney, Agent or Firm:
Hajime Tsukuni
Fumio Shinoda
Fumio Shinoda