Novel Pigment Binders Based on S-Thiosulphato (Bunte Salt) Terminated Polymers

An initial study has been undertaken to determine the viability of using S-thiosulphato (Bunte salt) terminated polyethers as pigment binders. Three such polymers (two synthesised and a commercial product) of different molecular mass and functionality were investigated. Two substrates were employed: wool fabric as prepared for dyeing and cotton fabric modified with a cationic polyamine. Pigments were dispersed in anionic surfactants show high substantivity for the latter substrate and as a result these dispersions can be successfully applied to appropriately treated fibre by exhaust methods