Bis-isoindoline pigments

Details Bis-isoindoline pigments Bis-isoindoline pigments

1979-06-07

1981-03-31

Coughlan, Jr., Paul M.

Organic compounds -- part of the class 532-570 series

Organic compounds

Nitrogen attached directly or indirectly to the purine ring...

106288Q, 260 37P, 260 4221, C09B 5704

Patent

active

042594880

ABSTRACT:
Isoindoline pigments of the formula ##STR1## or of a formula which is a tautomer thereof, wherein R represents a direct bond or an aliphatic, cycloaliphatic, aliphatic-cycloaliphatic, araliphatic or aromatic radical, R.sub.1 represents a hydrogen atom or an alkyl group of 1 to 4 carbon atoms, or, if R represents an ethylene group, both R.sub.1 s together also represent an ethylene group, R.sub.2 and R.sub.3 represent hydrogen atoms, alkyl groups of 1 to 4 carbon atoms or phenyl groups which are unsubstituted or substituted by methyl groups or halogen atoms, X represents an oxygen atom or a NH group, and Y represents an oxygen or a sulfur atom or a NH group dye plastics in fast yellow or brown shades.

REFERENCES:
patent: 3646033 (1972-02-01), Leister et al.
patent: 3923806 (1975-12-01), Bock et al.

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