Method for manufacturing a dye scavenging substrate

Patent metadata

Field	Value
Publication number	US-9845570-B2
Application number	US-201615046642-A
Country	US
Kind code	B2
Filing date	Feb 18, 2016
Priority date	Aug 20, 2013
Publication date	Dec 19, 2017
Grant date	Dec 19, 2017

Abstract

A method for manufacturing a dye scavenging substrate which comprises the steps of: (a) providing an absorbent substrate; (b) passing the substrate through a bath containing an alkaline solution of a dye scavenging compound selected from: (i) a N-trisubstituted ammonium-2-hydroxy-3-halopropyl compound having the general formula (I), or (ii) a salt of epoxy propyl ammonium having the general formula (II), or a combination thereof; (c) subjecting the substrate to a pressure of from about 0.04 MPa to about 0.40 MPa; (d) wrapping the substrate in a water impermeable material and rotating the substrate for a period of from about 12 hours to about 60 hours; (e) removing the water impermeable material and passing the substrate through a bath containing an acid solution; (f) subjecting the substrate to a pressure of from about 0.15 MPa to about 0.40 MPa; and (g) drying the substrate.

First claim

What is claimed is:

1. A method for manufacturing a dye scavenging substrate which comprises the steps of:
(a) providing an absorbent substrate;
(b) passing the substrate through a bath containing an alkaline solution of a dye scavenging compound selected from:
(i) a N-trisubstituted ammonium-2-hydroxy-3-halopropyl compound having the general formula (I):

wherein R 1 , R 2 , R 3 are each independently methyl, ethyl, butyl, benzyl or an hydroxyl substituted derivative thereof, X′ is a halogen atom, and Y′ − is chloride, bromide, sulfate or sulfonate;

or
(ii) a salt of epoxy propyl ammonium having the general formula (II):

wherein R 4 , R 5 , R 6 and Y″ − have the same meaning as R 2 , R 3 and Y′ − , respectively, as defined above, or

(iii) a combination thereof;

(c) subjecting the substrate to a pressure of from about 0.04 MPa to about 0.40 MPa;
(d) wrapping the substrate in a water impermeable material and rotating the substrate for a period of from about 24 hours to about 60 hours;
(e) removing the water impermeable material and passing the substrate through a bath containing an acid solution;
(f) subjecting the substrate to a pressure of from about 0.15 MPa to about 0.40 MPa; and
(g) drying the substrate.

2. A method according to claim 1 , wherein in step (c), the pressure is from about 0.05 MPa to about 0.35 MPa.

3. A method according to claim 1 , wherein in step (c), the pressure is obtained by passing the substrate between a pair of rollers.

4. A method according to claim 3 , wherein in step (c), the substrate is passed through the rollers at a speed of from about 10 m.min −1 to about 60 m.min −1 .

5. A method according to claim 1 , wherein in step (d), the substrate is rotated for a period of from about 24 hours to about 48 hours.

6. A method according to claim 1 , wherein in step (d), the temperature is from about 10° C. to about 100° C.

7. A method according to claim 1 , wherein in step (b), the alkaline solution is at a temperature of from about 10° C. to about 30° C.

8. A method according to claim 1 , wherein in step (e), the acid solution comprises water and a hydrochloric acid (HCl) solution.

9. A method according to claim 1 , wherein in step (f), the pressure is from about 0.20 MPa to about 0.35 MPa.

10. A method according to claim 1 wherein in step (f), the pressure is obtained by passing the substrate between a pair of rollers.

11. A method according to claim 10 , wherein in step (f), the substrate is passed through the rollers at a speed of from about 10 m.min −1 to about 60 m.min −1 .

12. A method according to claim 1 , wherein in step (g), the drying temperature is from about 95° C. to about 125° C.

13. A method according to claim 1 , wherein in step (b), the compound is glycidyltrimethylammonium chloride.

14. A method according to claim 1 , wherein the absorbent substrate is a cellulosic material.

15. A method according to claim 14 , wherein the absorbent substrate comprises a blend of viscose and cotton.

Assignees

• Henkel Ag & Co Kgaa

Inventors

• Mcnamee Patrick
• Le Guerledan Lauriane

Classifications

• D06M13/385

  containing epoxy groups · CPC title

• D06M2101/06

  cellulosic · CPC title

• D06M13/11

  Compounds containing epoxy groups or precursors thereof · CPC title

• D06P5/22 Primary

  Effecting variation of dye affinity on textile material by chemical means that react with the fibre {(documents concerning material modified in the mass by compounding with modifying agents affecting the dye affinity after spinning, are not classified here: see the relevant groups C08, D01F, D06P3/00; grafting of monomers on textile materials C08F, D06M11/00)} · CPC title

• C11D17/049

  Cleaning or scouring pads; Wipes · CPC title