Back to results
US 3,992,421 AGranted
6-Anilino-1,4,5-trihydroxyanthraquinones
AssigneeAmerican Color & Chemical Corporation
InventorRaouf Botros
Life of this patent
Estimating the term…
Abstract
Blue anthraquinone dyestuffs are prepared from the reaction of 6-chloro-1,4,5-trihydroxyanthraquinone with an appropriate aniline reactant. The resultant blue dyestuffs are 6-anilino-1,4,5-trihydroxyanthraquinones which produce excellent blue dyeings on polyester fabrics, particularly polyethylene terephthalate.
Claims1
A compound of the formula ##SPC14##
- each of R.sub.1 and R.sub.2 is independently hydrogen, chlorine, bromine, alkyl having from 1-8 carbon atoms, alkoxy having from 1-8 carbom atoms, hydroxy(lower alkyl), N-lower alkylamino, N,N-di-lower alkylamino, lower alkoxy lower alkyl, lower alkoxy lower alkoxy and acylamido having up to 7 carbon atoms.
Dependencies are inferred from the claim text.