Black perylene pigment and process for producing the same
US7105046B2 · kind B2 · utility
10Cited by
11References
2Claims
0Family size
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Key dates
| Filing date | Jul 26, 2002 |
| Grant date | Sep 12, 2006 |
| Priority date | — |
| Expiry date | Jul 26, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B67/0034
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A black perylene-based pigment produced by calcining at least one compound selected from the group consisting of diimide derivatives of perylene tetracarboxylic acid and diimide derivatives of perylene diiminodicarboxylic acid, at a temperature of 200 to 600° C. in vacuum or in an inert gas atmosphere, exhibits an excellent blackness, an excellent heat resistance and an excellent weather fastness as well as a high resistance and a high safety.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.