Tetrakisazo pigments prepared by reacting an aminoazobenzene and an aryl-bis-acetoacetylamino derivative
US3988312A · kind A · utility
1Cited by
6References
6Claims
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Key dates
| Filing date | Jun 24, 1975 |
| Grant date | Oct 26, 1976 |
| Priority date | — |
| Expiry date | Jun 24, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31855
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
New tetrakisazo pigments of the formula ##EQU1## wherein A, R.sub.1 and R.sub.2 denote a benzene or naphthalene radical, are prepared. The compounds may be used for pigmenting high-molecular organic material such as cellulose ethers, polyvinyl chloride and polypropylene. The pigments have high tinctorial and good fastness to migration. This is a continuation of application Ser. No. 479,963 filed on June 17, 1974, now abandoned.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.