| 摘要 |
<p>A pigment formulation which comprises (a) a finely divided organic pigment and (b) one or more urea derivatives of the formula K-(NH-CO-NH-R)2, where R is C12-C18-alkyl, C12-C18-alkenyl, C8-C18-alkoxypropyl or -(CH2)3-O-(C2H4O)n-R1, R1 is C2-C8-alkyl or phenyl, n is 1, 2, 3 or 4 and K is 1,5-naphthylene or 4,4'-diphenylenemethane, with or without (c) up to 5% by weight, based on (a and b), of agents conventionally present in pigment formulations. In binder solutions, the pigment formulations give printing inks and paints possessing excellent tinctorial properties. Some of the compounds (b) prevent the conversion of alpha -copper phthalocyanine to the beta -modification.</p> |
