Process for preparing organic pigment compositions
US5972099A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1997 |
| Grant date | Oct 26, 1999 |
| Priority date | — |
| Expiry date | Dec 17, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B67/002
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
This invention relates to a process for preparing pigment compositions by PA1 (a) treating an organic pigment with PA2 (1) a sterically hindered and/or bulky primary amine, and PA2 (2) a liquid in which the organic pigment is insoluble, and PA1 (b) blending the resultant surface-treated pigment composition from step (a) with a pigment derivative of formula (I) ##STR1## wherein Q represents an organic pigment moiety, PA1 X is O, S, NR.sup.1, --SO.sub.2 --, --CO--, --Alk--, --Ar--, or combinations thereof, PA1 Y is --OR.sup.2, --NR.sup.3 R.sup.4, or Het, PA1 Alk is C.sub.1 -C.sub.5 alkylene, C.sub.2 -C.sub.5 alkenylene, or C.sub.4 -C.sub.5 alkadienylene, or substituted derivatives thereof, PA1 Ar is arylene, PA1 R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are independently hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.5 -C.sub.7 cycloalkyl, C.sub.7 -C.sub.16 aralkyl, or C.sub.6 -C.sub.10 aryl, PA1 Het is a heterocycle, and PA1 n is 1 to 4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.