| abstract |
The invention provides the use of a compound of formula (I) to complex a water soluble dye, wherein the compound of formula (I) has the formula: wherein: x is an integer which is 0, 1, or 2; R 1 represents a group wherein y is an integer which is 0, 1, 2 or 3, and R 5 , R 6 and R 7 are independently selected from hydrogen and C 1 -C 4 alkyl; R 2 , R 3 and R 4 are independently selected from hydrogen and wherein y is an integer which is 0, 1, 2 or 3, and R 5 , R 6 and R 7 are independently selected from hydrogen and C 1 -C 4 alkyl. The invention has applications in the fields of dye-fixing, as a dyeing agent, and in the treatment of effluent the dyeing industry. |