Back to results
US 7,101,983 B2Granted
Azo dyes
AssigneeClariant Finance (BVI) Limited
InventorsRobert Egli, Oliver Eich, Knut Göke
Life of this patent
Estimating the term…
Abstract
The present invention relates to novel dyestuffs of formula (I) wherein the substituents have the meanings defined in the claims, the production of such dyestuffs, the use of these dyestuffs and material dyed or printed by such dyestuffs.
Claims12
A dyestuff according to formula (I), wherein
- R1 is —CH3;
- —C2H5;
- allyl;
- benzyl;
- propargyl;
- —C2H4CN;
- C2H4OCO—C1-2-alkyl;
- —C1-3-alkylene-COO—C2H4—N-phthalimid or —C2H4—COO—R5,
- R2 is H, —CH3, —CH2CH3, —C2H4OCO—C1-2-alkyl or —C2H4—COO—R5,
- wherein
- R5 is C1-4-alkyl;
- C1-2-alkoxyethyl;
- allyl;
- benzyl;
- propargyl;
- phenoxyethyl or tetrahydrofurfuryl-2.
13 more elements
Dependencies are inferred from the claim text.