Isoindoline colorants

Details Isoindoline colorants Isoindoline colorants

1986-07-17

1988-05-24

Daus, Donald G.

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

Organic compounds

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

548471, 106 23, 106288Q, C09B 5704

Patent

active

047467401

ABSTRACT:
Isoindoline colorants of the formula ##STR1## where the radicals R independently of one another are each methyl or ethyl, give neutral yellow colorations when incorporated into surface coatings. The colorations do not darken on weathering and, compared with prior art pigments, exhibit improved gloss stability on weathering.

REFERENCES:
patent: 4316023 (1982-02-01), Henning et al.
patent: 4371735 (1983-02-01), Scherer et al.
patent: 4400507 (1983-08-01), von der Crone
patent: 4401815 (1983-08-01), Lotsch et al.
patent: 4564680 (1986-01-01), Rolf et al.

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