Two new crystal modifications of a diketopyrrolopyrrole pigment
US5646299A · kind A · utility
11Cited by
10References
2Claims
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Key dates
| Filing date | Jun 22, 1995 |
| Grant date | Jul 8, 1997 |
| Priority date | — |
| Expiry date | Jun 22, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/09758
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Diketopyrrolopyrrole of the formula ##STR1## in its .beta.-modification and in its .gamma.-modification. Both the .beta.-modification and the .gamma.-modification are suitable as pigments for coloring high-molecular weight organic material. In comparison to the .alpha.-modification, the .beta.-modification shows a shift in shade towards yellowish-red. The .gamma.-modification gives brilliant orange colorations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.