COLORANT FOR SPUN-DYED VISCOSE RAYON

摘要

PURPOSE:To provide the titled colorant composed of carbon black treated with a (modified) polyamine, having excellent dispersibility in viscose, imparting viscose with good spinnability and giving rayon fiber having excellent gloss and clear black color. CONSTITUTION:The objective colorant is composed of a carbon lack modified with at least one kind of substance selected from the group or polyamine (preferably polyethylene imine) and its modified product. The treatment of carbon black is carried out e.g. by mixing and stirring the above polymer with carbon black at 20-350 deg.C.