Blue diketopyrrolopyrrole pigments
US5817832A · kind A · utility
13Cited by
7References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1996 |
| Grant date | Oct 6, 1998 |
| Priority date | — |
| Expiry date | Jun 11, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B57/004
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Diketopyrrolo3,4-c!pyrroles of the formula ##STR1## in which X and Y independently of one another are a divalent aromatic radical and R is a radical CN, COR.sub.5, CO.sub.2 R.sub.5, CON(R.sub.5).sub.2, NO.sub.2, SO.sub.2 R.sub.5, SOR.sub.5, SO.sub.2 N(R.sub.5).sub.2 or PO(OR.sub.6).sub.2. For the definition of the substituents R.sub.1, R.sub.2 and R.sub.5, refer to claim 1. These compounds are blue to violet, tinctorially strong pigments with good stability properties, in particular good light stability and weather stability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.