| Title of Invention |
ANIONIC MONOAZO DYES |
| Abstract |
The present invention relates to an anionic monoazo dyes of the formula (1) in which A represents a1-or 2-naphthyl residue which is substituted by a total of one or two sulphonic and lor carboxylic acid groups, R<Sub>1</Sub> represents hydrogen or C<Sub>1</Sub>-C<Sub>4</Sub> alkyl each D1 and D<Sub>2</Sub> independently of the other represent either an amino acid residue resulting from removal of a hydrogen atom from the amino group of the amino acid or the residue- NR<Sub>2</Sub>R<Sub>1</Sub> in which each Rz and R3 independently of the other, represent hydrogen, C<Sub>1</Sub>- C<Sub>4</Sub>alkyl, C<Sub>2</Sub>-C<Sub>6</Sub> alkyl which is substituted by hydroxy, halogen or cyano, phenyl which is unsubstituted or mono substituted by hydroxy, halogen, SO<Sub>3</Sub>H, C<Sub>1</Sub>-C<Sub>4</Sub> alkyl or C<Sub>1</Sub>-C<Sub>4</Sub> alkoxy or alternatively, R<Sub>2</Sub> and R<Sub>3</Sub>, together with the nitrogen atom to which they are connected, complete a saturated, 5-or 6-membered ring which may contain, in addition to the nitrogen atom, one nitrogen or oxygen atom and which may be further substituted and n is 0 or 1, a process for their preparation and the use of these dyes for dyeing natural or synthetic materials, in particular paper. |
Documents:
251-CHENP-2005 ABSTRACT.pdf
251-CHENP-2005 CLAIMS.pdf
251-CHENP-2005 CORRESPONDENCE OTHERS.pdf
251-CHENP-2005 CORRESPONDENCE PO.pdf
251-CHENP-2005 DESCRIPTION (COMPLETE).pdf
251-CHENP-2005 FORM 1.pdf
251-CHENP-2005 FORM 18.pdf
251-CHENP-2005 FORM 3.pdf
251-CHENP-2005 FORM 5.pdf
251-CHENP-2005 PCT.pdf
251-CHENP-2005 PETITIONS.pdf
251-CHENP-2005 POWER OF ATTORNEY.pdf