NEW ANIONIC COLORING AGENTS TO DYE LEATHER, PAPER, CARDBOARD AND TEXTILE SUBSTRATES: MIXTURES OF COLORING AGENTS INCLUDING THESE NEW PRODUCTS, AND SUBSTRATES DYED USING THE ABOVE COLORING AGENTS

摘要

An anionic coloring agent according to the following formula: C_A—R_SA. C_A comprises at least a chromophore and R_SA is a spacer-arm with the chemical structure: —X—R-Z. X is a chemical bond, —S(O)_n, or —NR₁, wherein R₁ is hydrogen or a C₁-C₁₀ alkyl group; R is a C₁-C₁₀ alkylene group; Z is —NR₂R₃, wherein R₂ and R₃ are, independently hydrogen or a C₁-C₁₀ alkyl group. Alternatively, Z is —NR₄—(CH₂)_m—W, wherein R₄ is hydrogen, a hydroxy C₁-C₁₀ alkyl group, or C₁-C₁₀ alkyl group; m is an integer from 1 to 10; and W is —COOR₅, wherein R₅ is hydrogen, a C₁-C₁₀ alkyl group; or —CONR₆R₇. R₆ and R₇ are, independently, a hydrogen atom, a C₁-C₁₀ alkyl group, —SO₃H; —S—SO₃H; —CN: or SO₃R₈ wherein, R₈ is hydrogen, a C₁-C₁₀ alkyl group, or —S—SO₃R₉ group, wherein, R₉ is hydrogen atom, or a C₁-C₁₀ alkyl group; provided that when X is —NR₁, and Z is —NR₂R₃, then R₁, R₂ and R₃ cannot be simultaneously a hydrogen atom. The inclusion of spacer-arms in anionic coloring agents improves dye properties such as strength, tone and affinity.