| 摘要 |
The present invention relates to a colorant composition comprising (i) an oxonol dye of general formula (I) wherein R1 and R2 are each independently of the other linear or branched C2-C6alkyl residues; R3, R4 and R5 are each independently of the other hydrogen, a C2-C14alkyl residue which may be unsubstituted or hydroxy-or amino-substituted and optionally interrupted by an oxygen atom and R6 is a C2-C14alkyl residue, which may be unsubstituted or hydroxy-or amino-substituted and optionally interrupted by an oxygen atom; and (ii) at least one cellulose nitrate binder. |
