| 摘要 |
A method for changing the surface properties of a fibrous cellulose-containing material and dyeing the material. The method comprises: (a) applying to at least one surface of the cellulose-containing material a cationic aqueous treating solution containing (1) a heterocyclic polyhydroxy compound selected from dimethyldihydroxy ethyleneurea, dimethyloldihydroxy ethyleneurea, trimethylol melamine, hexamethylol melamine and mixtures thereof, (2) choline chloride and (3) crosslinking catalyst to effect at least 60% wt. pickup of the treating solution onto the material, the concentration in the treating solution of heterocyclic polyhydroxy compound being 5-100 g/L, the concentration of choline chloride being 40-600 g/L and the weight ratio of heterocyclic polyhydroxy compound to choline chloride being 0.1-6; (b) heating the thusly treated cellulosic material from step (a) to a temperature of 250-315F (121-157C) to effect removal of water therefrom by evaporation, so that the water content is reduced to a level no higher than 1 % wt.; (c) further heating the dried material from step (b) to a temperature of 320-400F (169-240C) for 3-180 seconds to effect crosslinking of the cyclic polyhydroxy compound with the cellulose fibers in the material; (d) cooling the crosslinked cellulosic material; and (e) dyeing the crosslinked cellulosic material.
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