Patent · US Expired

2,4-Dioxotetrahydropyrimido-(1,2-a)-benzimidazole substituted isoindoline dyes and their use

US4525591A · kind A · utility

4Cited by

6References

9Claims

0Family size

Assignee

BASF SE

Inventors

Wolfgang Lotsch · Beindersheim, DE
Reinhard Kemper · Heidelberg, DE
Ernst Schefczik

Key dates

Filing date	Mar 1, 1983
Grant date	Jun 25, 1985
Priority date	—
Expiry date	Mar 1, 2003

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09B57/04
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Isoindoline dyes of the formula ##STR1## where X is a radical of the formula ##STR2## and R is hydrogen, alkyl, benzyl, phenyl, napth-1-yl or a 5-membered or 6-membered unsaturated heterocyclic radical which may or may not be fused to a benzene ring, and the rings A, the phenyl ring, the naphthyl ring and the heterocyclic radical in R are unsubstituted or substituted by non-solubilizing groups, color finishes, printing inks and plastics in deep red or brown hues which are very lightfast and fast to migration.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.