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Inventor: B ottcher; Peter
Address: Mutterstadt, DE
No. of patents: 1
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 5569758 |
Preparation of metal-free phthalocyanines |
October 29, 1996 |
| A process for preparing metal-free phthalocyanines which can carry up to 16 halogen atoms, cyano groups, carboxyl groups, sulfo groups, C.sub.1 -C.sub.18 -alkyl groups and/or aryl radicals as substituents by reductive cyclization of ortho-phthalodinitrile substituted ortho-phthalodinitri |
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