Sulphonated lignin based screen ink formulations

摘要

An attempt is made to develop a screen ink composition,based on lignin obtained from black liquor as a partial replacement for conventional alkyd resin.Lignin has been used as a replacement for alkyd resin to an extent of 35%.Unlike the conventional alkyd resin,efforts were made to prepare a novel alkyd resin with short oil length(20%)using chain stopper.The overall consumption of petroleum solvent in ink is around 16% which is much lesser than conventional ink which utilizes around 40% solvent.The physicochemical and film properties of ink have been studied and compared with commercial sample.The cost of the present product is less than the conventional product.