Methyl or methoxy substituted iminoisoindolinone pigments
US4043999A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 1976 |
| Grant date | Aug 23, 1977 |
| Priority date | — |
| Expiry date | Mar 3, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B43/11
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Iminoisoindolinone dyestuffs of the formula ##STR1## wherein X denotes chlorine or bromine atoms, X.sub.1 denotes a halogen atom or an alkyl, alkoxy, nitrile, trifluoromethyl or alkylsulphonyl group, Y.sub.1 denotes a hydrogen or halogen atom or an alkyl or alkoxy group, X.sub.2 denotes a hydrogen or halogen atom or an alkyl or alkoxy group and Y.sub.2 denotes a hydrogen or halogen atom or an alkyl or alkoxy group, or the radicals X.sub.2 and Y.sub.2 together form a fused benzene ring, and wherein, in the benzene rings A and B, a hydrogen atom is present in at least one o-position relative to the azomethine group were prepared. The dyestuffs may be used for pigmenting high molecular weight organic materials such as cellulose ethers, polyamides and polyesters. The pigments have outstanding fastness to light, migration and weathering.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.