The invention relates to a preparation method of a
formaldehyde-free color fixative. The invention is characterized in that amines and
epoxy chloropropane react to generate a condensate, wherein the amines are total amines and prepared by mixing hexamethylendiamine and other substances; and the other substances can be one or more of
ammonia water, monomethyl amine, dimethyl amine,
diethylenetriamine,
triethylenetetramine, tetraethylenepentamine, tetraethylenepentamine,
ethylene diamine,
urea and
urea substitute. The color fixative has the advantages of
high color fastness, small influence on sensitive
color tone, low consumption, no environment
pollution of
formaldehyde, accessible raw materials and simple production technique, can enhance the dry / wet fastness to
rubbing and the color fastness to
water washing, and basically does not generate color phase variations when fixing
emerald blue, bright blue and other sensitive color dyes.