Method for improving the properties of Solid Sulfur Dye on a substrate

摘要

Method of treating Substrates containing Sulphur dyes.The application comprises a substrate formed by Fibers containing Hydroxy groups, Dyed or printed with a Sulfur Dye, a pH between 3 and 6, The reaction product of 5 to 40 parts of a compound obtained by reaction of a primary or secondary Amine with Cyanamide, dicyanamide, Or biguanidina guanidine containing Active Hydrogen Atoms on nitrogen25 - 110, a Derivative of N - metilolado urea as n, N - dimethylol - 4.5 - dihidroxietilenourea, or similar, in the presence of 1 - 30 parts of magnesium chloride as a Catalyst. The application is made by the method of Impregnation and is then subjected to a heat treatment at temperarturas between 120jc and 200jc.It has applications for the treatment of Cellulosic Fibers alone or mixed with other fibres.