Treatment of textiles
AssigneeI.W.S. Nominee Company Limited
InventorsDavid M. Lewis, Keith R. F. Cockett
Life of this patent
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Abstract
A process for the treatment of textiles, especially to impart shrink resistance thereto, in which there is applied to the textile a water-soluble curable polymeric material in the presence of alkali in an aqueous medium and simultaneously with or subsequently to such application there is applied a compatible exhaustion agent and the polymeric material is exhusted onto the textile and cured thereon.
Claims17
A method of treating keratinous fiber containing textiles comprising applying to the textile a water soluble, curable polymeric material in the presence of an alkaline compound, from an aqueous medium, and simultaneously or subsequently applying to the textile while the textile is in contact with said alkaline aqueous medium a compatible exhaustion agent which reduces the solubility of the polymeric material comprising a soluble inorganic salt, allowing the polymeric material to exhaust onto the textile and curing the polymeric material;
- the said polymeric material being selected from the group consisting of (a) Bunte salt compounds comprising a polyoxyalkylene polymeric chain backbone and at least two thiosulfate groups per molecule and (b) poly(carbamoyl-sulfonates) prepared by reaction of a polymeric di- or poly-isocyanate with a bisulfite.
A method of treating keratinous fiber containing textiles comprising applying to the textile a water soluble, curable polymeric material in the presence of an alkaline compound, from an aqueous medium, and simultaneously or subsequently applying to the textile while the textile is in contact with said alkaline aqueous medium a compatible exhaustion agent which reduces the solubility of the polymeric material comprising a soluble inorganic salt, allowing the polymeric material to exhaust onto the textile and curing the polymeric material;
- the said polymeric material being selected from the group consisting of (a) Bunte salt compounds comprising a polyoxyalkylene polymeric chain backbone and at least two thiosulfate groups per molecule and (b) poly(carbamoyl-sulfonates) prepared by reaction of a polymeric di- or poly-isocyanate with a bisulfite wherein said aqueous medium containing the said curable polymeric material and alkaline compound is a short liquor having a weight ratio to the textile of from 1:1 to 3:1 in which:
- (i) the polymeric material and alkali are mixed and allowed to age:
- (ii) the liquor from (i) is applied to the textile in a washing machine or milling machine;
- (iii) the textile is agitated until a uniform distribution of the liquor is obtained;
- (iv) a solution of inorganic salt is sprayed onto the textile and agitation continued until it is evenly distributed;
- and
- (v) the textile is rinsed, hydroextracted and dried.
A method of treating keratinous fiber containing textiles comprising applying to the textile a water soluble, curable polymeric material in the presence of an alkaline compound, from an aqueous medium, and simultaneously or subsequently applying to the textile while the textile is in contact with said alkaline aqueous medium a compatible exhaustion agent which reduces the solubility of the polymeric material comprising a soluble inorganic salt, allowing the polymeric material to exhaust onto the textile and curing the polymeric material;
- the said polymeric material being selected from the group consisting of (a) Bunte salt compounds comprising a polyoxyalkylene polymeric chain backbone and at least two thiosulfate groups per molecule and (b) poly(carbamoyl-sulfonates) prepared by reaction of a polymeric di- or poly-isocyanate with a bisulfite, wherein the aqueous medium containing the curable polymer material and alkaline compound comprises a long liquor having a weight ratio to the textile of from 10:1 to 100:1 in which:
- (i) the polymer and alkali are mixed and added to the bath containing the textile;
- (ii) a solution of the inorganic salt is added and the temperature raised to 50.degree. C.;
- (iii) after about 30 minutes a further addition of inorganic salt is added;
- and,
- (iv) after a further 15 to 30 minutes the textile is hydroextracted and dried.
Dependencies are inferred from the claim text.