Patent · US Expired

Diamino-1,3,5-triazinylstilbene compounds and process for preparing same

US4220760A · kind A · utility

4Cited by

2References

4Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Rudiger Erckel · Eppstein, DE
Erwin Schmidt · Baltmannsweiler, DE
Helmut Eckes · Eppstein, DE
Gu Rosch · Bad Soden am Taunus, DE

Key dates

Filing date	Nov 13, 1978
Grant date	Sep 2, 1980
Priority date	—
Expiry date	Nov 13, 1998

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07F9/4056
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Diamino-1,3-5-triazinylstilbene compounds of the formula ##STR1## in which R.sub.1 and R.sub.2 may be identical or different and represent each hydrogen or non chromophoric radicals selected from the group consisting of fluorine or chlorine atoms, phenyl, alkyl, lower alkoxy, lower dialkylamino, lower trialkylammonium, acyl amino or optionally functionally modified carboxy or sulfo groups, or two vicinal radicals, R.sub.1 and R.sub.2 denote together lower alkylene, a fused benzo ring or 1,3-dioxypropylene, the rings A and B having optionally further non chromophoric substituents, and X is O or S. These compounds are good optical brighteners and are prepared by reacting a 4'-cyano-4-benzoxazolyl- or 4'-cyano-4-benzthiazolylstilbene compound with dicyanoamide or with urea and ammonia.

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