Antimicrobial finishing of textile fabrics

• US 20060265814A1
• Filed: 05/03/2006
• Published: 11/30/2006
• Est. Priority Date: 05/04/2005
• Status: Abandoned Application

• Current Assignee: Fritz Blanke GmbH & Co. KG.
• Original Assignee: Fritz Blanke GmbH & Co. KG.
• Inventors: Ritter, Wolfgang
• Application Number:
  US11/416,383
• Publication Number:
  US 20060265814A1
• Time in Patent Office: Days
• US Class Current: 8/115.510
• CPC Class Codes: A01N 25/10 Macromolecular compounds
• CPC Class Codes: A01N 25/34 Shaped forms, e.g. sheets, not provided for in any other sub-group of this main group
• CPC Class Codes: A01N 59/16 Heavy metals; Compounds thereof
• CPC Class Codes: D06M 11/13 Ammonium halides or halides of elements of Groups 1 or 11 of the Periodic Table
• CPC Class Codes: D06M 15/01 with natural macromolecular compounds or derivatives thereof with natural rubber or derivatives thereof D06M15/693
• CPC Class Codes: D06M 15/564 Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them
• CPC Class Codes: D06M 16/003 with enzymes or microorganisms

Abstract

A process for antimicrobial finishing of textile fabrics, especially of wovens, includes the steps of: a) treating a textile fabric with a first dilute aqueous liquor including at least one water-soluble polymeric dispersant and/or a polymeric thickener and at least one particulate silvery constituent selected from i) sparingly water-soluble salts of silver, ii) a silver sol and iii) a pulverulent silvery material, and b) treating the textile fabric with a second aqueous liquor b) including an aqueous composition of a binder.

Claims

1. A process for antimicrobial finishing of a textile fabric, comprising the steps of:

a) treating said textile fabric with a first dilute aqueous liquor comprising at least one water-soluble polymeric dispersant and/or a polymeric thickener and at least one particulate silvery constituent selected from

i) sparingly water-soluble salts of silver,

ii) a silver sol and

iii) a pulverulent silvery material, and

a) treating said textile fabric with a second aqueous liquor b) comprising an aqueous composition of a binder.

2. The process according to claim 1 wherein said water-soluble polymeric dispersant is gelatin.

3. The process according to claim 1 wherein the first liquor contains an aqueous dispersion of a sparingly water-soluble salt of silver as the silvery constituent, said aqueous dispersion being obtained by addition of a precipitant to an aqueous solution of a soluble salt of silver comprising said water-soluble polymeric dispersant.

4. The process according to claim 1 wherein said sparingly soluble salt of silver is a silver halide or a mixture of silver halides.

5. The process according to claim 3 further comprising reducing said salt of silver.

6. The process according to claim 1 wherein the first liquor contains a silver sol as the silvery constituent, said silver sol was obtained by adding a reducing agent to an aqueous solution of a soluble salt of silver comprising said water-soluble polymeric dispersant.

7. The process according to claim 2 wherein the first liquor contains a dispersed silver-coated glass powder having an average particle size in the range from 0.5 to 50 μ

m as the silvery constituent.

8. The process according to claim 7 wherein said first liquor further comprises a sparingly water-soluble silvery constituent having an average particle size below 500 nm.

9. The process according to claim 1 wherein the concentration of silvery constituents in said first liquor is in the range from 0.01 to 1 g/l, calculated as silver.

10. The process according to claim 1 wherein said binder used in step b) comprises isocyanate groups or reversibly blocked isocyanate groups.

11. The process according to claim 10 wherein said binder is a reactive polyurethane.

12. The process according to claim 1 wherein said binder used in step b) comprises at least one crosslinkable compound having at least two N-hydroxymethyl groups.

13. The process according to claim 1 wherein said binder is a polymeric binder having a glass transition temperature in the range from −

20 to +60°

C.

14. The process according to claim 1 wherein the concentration of binder in the second liquor is in the range from 10 to 300 g/l.

15. A textile fabric obtainable by a process according to claim 1.