Water- and oil-repellent treatment of textile

Abstract

Excellent water- and oil-repellency and soil releasability can be obtained by a method of preparing a treated textile, having steps of: (1) preparing a treatment liquid containing a water- and oil-repellent agent and a stain blocking agent, (2) adjusting pH of the treatment liquid to at most 7, (3) applying the treatment liquid to a textile, (4) treating the textile with steam, and (5) washing the textile with water and dehydrating the textile, wherein the water- and oil-repellent agent contains at least one fluorine-containing compound selected from the group consisting of a fluorine-containing polymer and a fluorine-containing low molecular weight compound, and the water- and oil-repellent agent or the treatment liquid contains a cationic emulsifying agent.

1 . A method of preparing a treated textile, comprising steps of: 
     (1) preparing a treatment liquid comprising a water- and oil-repellent agent and a stain blocking agent, 
     (2) adjusting pH of the treatment liquid to at most 7, 
     (3) applying the treatment liquid to a textile, 
     (4) treating the textile with steam, and 
     (5) washing the textile with water and dehydrating the textile, 
     wherein the water- and oil-repellent agent comprises at least one fluorine-containing compound selected from the group consisting of a fluorine-containing polymer and a fluorine-containing low molecular weight compound, and the water- and oil-repellent agent or the treatment liquid contains a cationic emulsifying agent. 
   
   
       2 . The method according to  claim 1 , wherein the water- and oil-repellent agent or the treatment liquid further contains a salt of an organic acid. 
   
   
       3 . The method according to  claim 1 , wherein the water- and oil-repellent agent is prepared by the use of the cationic emulsifying agent. 
   
   
       4 . The method according to  claim 1 , wherein after the preparation of the water- and oil-repellent agent, the cationic emulsifying agent is added to the water- and oil-repellent agent to give the treatment liquid. 
   
   
       5 . The method according to  claim 1  wherein the cationic emulsifying agent is a quarternary ammonium salt. 
   
   
       6 . The method according to  claim 1 , wherein the cationic emulsifying agent is an ammonium salt, a monoalkyl ammonium salt, a dialkyl ammonium salt, a trialkyl ammonium salt, tetraalkyl ammonium salt, a dipolyoxyethylene alkyl methyl ammonium salt, a dipolyoxyethylene alkyl amine, a fatty acid amide of dipolyoxyethylene, or an alkyl amine wherein the number of carbon atoms of the alkyl group is from 1 to 22 and the total number of oxyethylene groups in the molecule is from 2 to 40. 
   
   
       7 . The method according to  claim 2 , wherein the organic acid in the salt of organic acid is a carboxylic acid, sulfonic acid or sulfate monoester. 
   
   
       8 . The method according to  claim 6 , wherein the salt of organic acid is a metal salt or an ammonium salt. 
   
   
       9 . The method according to  claim 1 , wherein the fluorine-containing polymer comprises: 
     (I) a repeating unit derived from a monomer having a fluoroalkyl group. 
   
   
       10 . The method according to  claim 1 , wherein the fluorine-containing polymer comprises: 
     (I) a repeating unit derived from a monomer having a fluoroalkyl group, and 
     (II) a repeating unit derived from a fluorine-free monomer, and/or 
     (III) a repeating unit derived from a crosslinkable monomer. 
   
   
       11 . The method according to  claim 1 , wherein the stain blocking agent is a phenol/formaldehyde condensate, an acrylic polymer or a mixture of the phenol/formaldehyde condensate and the acrylic polymer. 
   
   
       12 . The method according to  claim 1 , wherein pH of the treatment liquid is adjusted to at most 4 in the step (2). 
   
   
       13 . A textile obtained by the method according to  claim 1 . 
   
   
       14 . A carpet obtained by the method according to  claim 1 . 
   
   
       15 . The carpet according to  claim 14 , wherein the carpet comprises a nylon fiber, a polypropylene fiber and/or a polyester fiber. 
   
   
       16 . A treatment liquid usable in a method of treating a textile, comprising steps of: 
     (1) preparing a treatment liquid comprising a water- and oil-repellent agent and a stain blocking agent, 
     (2) adjusting pH of the treatment liquid to at most 7, 
     (3) applying the treatment liquid to a textile, 
     (4) treating the textile with steam, and 
     (5) washing the textile with water and dehydrating the textile, 
     wherein the water- and oil-repellent agent comprises at least one fluorine-containing compound selected from the group consisting of a fluorine-containing polymer and a fluorine-containing low molecular weight compound, and the water- and oil-repellent agent is emulsified with a cationic emulsifying agent, or, after the emulsification of the water- and oil-repellent agent, the cationic emulsifying agent is added to the water- and oil-repellent agent.