| 摘要 |
The invention relates to an aqueous disperse dye or optical brightener formulation which comprises (a) from 5 to 55 per cent by weight, based on (a + c), of one or more finely divided dyes, optical brighteners or mixtures of these, (b) from 10 to 200 per cent by weight, based on (a), of a water- soluble surfactant of the formula <IMAGE> where X is from 0 to a mean value of 125, Y is from a mean value of 37 to a mean value of 250, but if X is >37, Y:X is at least 1:1, Z is 0 or 1 and Me(+) is an alkali metal ion, or mixtures of such surfactants, (c) from 45 to 95 per cent by weight, based on (a + c) of water or of a mixture of water and a water- retaining agent, with or without (d) further additives conventionally present in aqueous formulations. The formulations are low viscosity dispersions which remain stable, and retain their low viscosity, even on prolonged storage. The formulations may be used to dye synthetic fibers at up to 140 DEG C, without flocculation of the dyes. |
