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Inventor: Rolf; Meinhard
Address: Charleston, SC
No. of patents: 1
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 5091532 |
Process for the preparation of pigments based on isoindole |
February 25, 1992 |
| A new process for the preparation of pigments of the formula ##STR1## comprises first reacting phthalodinitrile in an organic medium in the presence of a base with an alcohol and then with a compound of the formula ##STR2## in the presence of water at a pH of 1-6. |
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