| 摘要 |
<p>1388139 Azo pigment peparations HOECHST AG 1 May 1972 [3 May 1971] 20113/72 Headings C4P and C4A Azo pigment preparations are prepared by adding an amine of general formula or a salt thereof, in which formula R is an unsubstituted or substituted phenyl radical, n is an integer 1 to 10, x is an integer 2 to 10, y is an integer 1 to 5, to the azo pigment, or pigment components before, during or after coupling of the pigment. The amount of amine may be 1 to 100% calculated on the weight of the pigment, preferred amines being N-benzyl-propylene-diamine, N-#-phenethyl-propylene-diamine, and N - 4 - methylbenzyl - propylene - diamine. The radical R may be substituted by nitro, halogeno, alkoxy and alkyl substituents. The amine may be added to an aqueous suspension of the pigment or pigment components which may be heated optionally under pressure. Printing inks prepared with the amine treated pigments have good rheological properties.</p> |
