| 摘要 |
<p>A halogenated phthalocyanine compound is produced by heating a phthalocyanine compound (i.e. a metal-free phthalocyanine or a metal complex of a phthalocyanine, or a mixture thereof) and a Friedel-Crafts catalyst at an elevated temperature sufficient to melt the mixture, contacting the melt with elemental halogen, and thereafter contacting the resulting mixture in the absence of elemental halogen at an elevated temperature with at least one sulphur oxychloride. The melt may contain a melting point depressant, for example, sodium chloride or other alkali metal halide. Example of catalyst are AlCl3, AlBr3, FeCl3, ZnCl2 and SbCl3. The elemental halogen may be chlorine, bromine or chlorine and bromine. The reaction with halogen preferably takes place at 80 DEG to 250 DEG C. The sulphur oxychloride may be thionyl chloride, sulphuryl chloride, pyrosulphuryl chloride or a mixture of two or more thereof. If desired, a sulphur chloride may also be present. The process of contacting with sulphur oxychloride preferably takes place within the range from 100 DEG to 200 DEG C. for from 10 minutes to 3 hours. At the end of the process of contacting with sulphur oxychloride, the product is preferably maintained at a temperature within the range 100 DEG to 200 DEG C. for 10 minutes to 3 hours. The product may be poured into a large excess of cold water, if desired acidified with hydrochloric acid, and the pigment filtered, washed and dried. The pigment may be subjected to an after-treatment, for example, boiling a dispersion in nitrobenzene or other ganiorc solvent under reflux conditions in the presence of sodium hydroxide or another alkali and oleic acid or other long-chain fatty acid. Specifications 925,379 and 926,978 are referred to.</p> |
