Back to results
US 7,220,843 B2Granted
Methanesulfonamide azo dyes
AssigneeClariant Produkte (Deutschland) GmbH
InventorsDominique Pflieger, Hans Joachim Metz
Life of this patent
Estimating the term…
Abstract
This invention relates to monoazo, disazo and trisazo colorants of the formula (I) where M represents two hydrogen atoms or one metal ion selected from the group consisting of Cu, Co, Ni, Mn, Zn and Al; A is the radical of a substituted naphthyl or pyrazolyl radical.
Claims14
A compound of the general formula (I)
- wherein
- M is two hydrogen atoms or one metal ion selected from the group consisting of Cu, Co, Ni, Mn, Zn and Al;
- A is
- R1 is H, OH or —NH—(CH2)a—SO3−X+ where a is from 1 to 6;
- R2 is H or a radical of the formulae
- D is C6H4, C6H3(OH) or C6H3 (OCH3);
- X is H, alkali metal, NH4, C1–C18-alkyl-NH3, (C1–C18-alkyl)2NH2, (C1–C18-alkyl)3NH, (C1–C18-alkyl)3CNH3, (C1–C18-alkyl)2CHNH3, or (C1–C18-alkyl)4N, and
- n is from 1 to 4.
5 more elements
Dependencies are inferred from the claim text.