| 摘要 |
Fixatives or agents for the aftertreatment of acid dyed polyamide textiles, to increase the wet-fastness of dyeings, comprise condensation products having the structure
<CHEM>
wherein R is a radical derived from a phenolic compound capable of reacting with formaldehyde; x is 1 or 2; Y is 0, 1, 2 or 3; z is 0, 1, 2 or 3 and y + z is 1, 2 or 3 and M is H, Na, K, Li, NH4 or a mono, di or tri alkanol ammonium. The compounds are made by reacting 4,4 min -thiodiphenol with formaldehyde, condensing the reaction product with a phenolic compound and reacting the product with a formaldehyde-bisulfite adduct. These products are also useful as reserving agents for polyamide fibres when blended with cellulosic fibres and the latter dyed with direct dyes. |
