Water- and oil-repellent composition for nonwoven fabric, and nonwoven fabric product

Abstract

A water- and oil-repellent composition for a nonwoven fabric, which includes (1) a fluorine-containing water- and oil-repellent agent and (2) a sizing agent and is water-based, can impart good alcohol repellency, water pressure resistance, and antistatic properties to an object to be treated, such as a nonwoven fabric. The water- and oil-repellent composition for a nonwoven fabric does not contain a carbodiimide compound and may contain at least 20 wt % of water with respect to the water- and oil-repellent composition. The active ingredient of the sizing agent may include an alkylketene dimer and/or an alkenylketene dimer. The water- and oil-repellent composition may further contain an antistatic agent and a penetrant. A treated substrate may be a nonwoven fabric.

1 . A water- and oil-repellent composition for a nonwoven fabric, comprising (1) a fluorine-containing water- and oil-repellent agent and (2) a sizing agent, and being aqueous,
 wherein a carbodiimide compound is not contained,   wherein a sizing active ingredient in the sizing agent comprises at least one selected from the group consisting of an alkyl ketene dimer, an alkenyl ketene dimer, a wax, a vinyl alcohol polymer, a styrene/(meth)acrylic acid copolymer, a styrene/(meth)acrylic acid ester copolymer, a styrene/(meth)acrylic acid/(meth)acrylic acid ester copolymer, a styrene/maleic acid copolymer, an isobutylene/(meth)acrylic acid copolymer, a diisobutylene/maleic acid copolymer, a propylene/maleic acid copolymer, an ethylene/maleic acid copolymer, a poly(meth)acrylic homopolymer or copolymer, and a (meth)acrylic acid ester/acrylonitrile copolymer.   
     
     
         2 . The water- and oil-repellent composition for a nonwoven fabric according to  claim 1 , wherein the water- and oil-repellent composition contains 20% by weight or more of water, based on the water- and oil-repellent composition. 
     
     
         3 . The water- and oil-repellent composition for a nonwoven fabric according to  claim 1 , wherein the fluorine-containing water- and oil-repellent agent contains a fluorine-containing polymer having a repeating unit formed from a monomer represented by the formula:
   CH 2 ═C(—X 11 )—C(═O)—Y 11 —Z 11 —Rf
   wherein X 11  is a hydrogen atom, a monovalent organic group,   or a halogen atom,   Y 11  is —O— or —NH—,   Z 11  is a direct bond or a divalent organic group, and   Rf is a fluoroalkyl group having 1 to 20 carbon atoms.   
     
     
         4 . The water- and oil-repellent composition for a nonwoven fabric according to  claim 3 ,
 wherein X 11  is a hydrogen atom, a methyl group, or a chlorine atom,
 Z 11  is an aliphatic group having 1 to 10 carbon atoms, an aromatic group or cycloaliphatic group having 6 to 18 carbon atoms, a —CH 2 CH 2 N(R 1 ) SO 2 — group (provided that R 1  is an alkyl group having 1 to 4 carbon atoms), a —CH 2 CH(OZ 1 )CH 2 —(Ph-O) p — group (provided that Z 1  is a hydrogen atom or an acetyl group, Ph is a phenylene group, and p is 0 or 1), a —(CH 2 ) n -Ph-O— group (provided that Ph is a phenylene group, and n is 0 to 10), a —(CH 2 ) m —SO 2 —(CH 2 ) n — group, or a —(CH 2 ) m —S—(CH 2 ) n — group (provided that m is 1 to 10, and n is 0 to 10), and 
 Rf is a perfluoroalkyl group. 
   
     
     
         5 . The water- and oil-repellent composition for a nonwoven fabric according to  claim 1 , wherein the sizing active ingredient in the sizing agent contains an alkyl ketene dimer and/or an alkenyl ketene dimer. 
     
     
         6 . The water- and oil-repellent composition for a nonwoven fabric according to  claim 1 , wherein the sizing active ingredient in the sizing agent contains, in addition to the alkyl ketene dimer and/or the alkenyl ketene dimer, at least one selected from the group consisting of a wax, a vinyl alcohol polymer, a melamine/formalin polymer, a styrene/(meth)acrylic acid copolymer, a styrene/(meth)acrylic acid ester copolymer, a styrene/(meth)acrylic acid/(meth)acrylic acid ester copolymer, a styrene/maleic acid copolymer, an isobutylene/(meth)acrylic acid copolymer, a diisobutylene/maleic acid copolymer, a propylene/maleic acid copolymer, an ethylene/maleic acid copolymer, a poly(meth)acrylic homopolymer or copolymer, and a (meth)acrylic acid ester/acrylonitrile copolymer. 
     
     
         7 . The water- and oil-repellent composition for a nonwoven fabric according to  claim 1 ,
 wherein the fluorine-containing water- and oil-repellent agent contains a fluorine-containing polymer having a repeating unit formed from a monomer represented by the formula:
   CH 2 ═C(—X 11 )—C(═O)—Y 11 —Z 11 —Rf
 
   
       wherein X 11  is a hydrogen atom, a methyl group, or a chlorine atom,
 Y 11  is —O— or —NH—, 
 Z 11  is an aliphatic group having 1 to 10 carbon atoms, an aromatic group or cycloaliphatic group having 6 to 18 carbon atoms, a —CH 2 CH 2 N(R 1 ) SO 2 — group (provided that R 1  is an alkyl group having 1 to 4 carbon atoms), a —CH 2 CH(OZ 1 )CH 2 —(Ph-O) p — group (provided that Z 1  is a hydrogen atom or an acetyl group, Ph is a phenylene group, and p is 0 or 1), a —(CH 2 ) n -Ph-O— group (provided that Ph is a phenylene group, and n is 0 to 10), a —(CH 2 ) m —SO 2 —(CH 2 ) n — group, or a —(CH 2 ) m —S—(CH 2 ) n — group (provided that m is 1 to 10, and n is 0 to 10), and 
 
       Rf is a perfluoroalkyl group having 1 to 20 carbon atoms,
 wherein the sizing active ingredient in the sizing agent contains an alkyl ketene dimer and/or an alkenyl ketene dimer, 
 wherein the weight ratio of the fluorine-containing polymer to the active ingredient of the sizing agent is 60:40 to 85:15. 
 
     
     
         8 . The water- and oil-repellent composition for a nonwoven fabric according to  claim 1 , wherein the water- and oil-repellent composition contains at least one selected from an antistatic agent and a penetrating agent, or the water- and oil-repellent composition is used in combination with at least one selected from an antistatic agent and a penetrating agent. 
     
     
         9 . A water- and oil-repellent kit for a nonwoven fabric, comprising:
 (1) a water- and oil-repellent agent; and   (2) a sizing agent,   wherein a carbodiimide compound is not contained, wherein a sizing active ingredient in the sizing agent comprises at least one selected from the group consisting of an alkyl ketene dimer, an alkenyl ketene dimer, a wax, a vinyl alcohol polymer, a styrene/(meth)acrylic acid copolymer, a styrene/(meth)acrylic acid ester copolymer, a styrene/(meth)acrylic acid/(meth)acrylic acid ester copolymer, a styrene/maleic acid copolymer, an isobutylene/(meth)acrylic acid copolymer, a diisobutylene/maleic acid copolymer, a propylene/maleic acid copolymer, an ethylene/maleic acid copolymer, a poly(meth)acrylic homopolymer or copolymer, and a (meth)acrylic acid ester/acrylonitrile copolymer.   
     
     
         10 . The water- and oil-repellent kit for a nonwoven fabric according to  claim 9 ,
 wherein the water- and oil-repellent agent contains a fluorine-containing polymer having a repeating unit formed from a monomer represented by the formula:
   CH 2 ═C(—X 11 )—C(═O)—Y 11 —Z 11 —Rf
 
   
       wherein X 11  is a hydrogen atom, a methyl group, or a chlorine atom, 
       Y 11  is —O— or —NH—, 
       Z 11  is an aliphatic group having 1 to 10 carbon atoms, an aromatic group or cycloaliphatic group having 6 to 18 carbon atoms, a —CH 2 CH 2 N(R 1 ) SO 2 — group (provided that R 1  is an alkyl group having 1 to 4 carbon atoms), a —CH 2 CH(OZ 1 )CH 2 —(Ph-O) p — group (provided that Z 1  is a hydrogen atom or an acetyl group, Ph is a phenylene group, and p is 0 or 1), a —(CH 2 ) n -Ph-O— group (provided that Ph is a phenylene group, and n is 0 to 10), a —(CH 2 ) m —SO 2 —(CH 2 ) n — group, or a —(CH 2 ) m —S—(CH 2 ) n — group (provided that m is 1 to 10, and n is 0 to 10), and 
       Rf is a perfluoroalkyl group having 1 to 20 carbon atoms,
 wherein the sizing active ingredient in the sizing agent contains an alkyl ketene dimer and/or an alkenyl ketene dimer, 
 wherein the weight ratio of the fluorine-containing polymer to the active ingredient of the sizing agent is 60:40 to 85:15. 
 
     
     
         11 . A method for treating a nonwoven fabric, wherein a nonwoven fabric is treated with the water- and oil-repellent composition for a nonwoven fabric according to  claim 1 . 
     
     
         12 . A nonwoven fabric product to which a water- and oil-repellent polymer and the sizing active ingredient in the water- and oil-repellent composition for a nonwoven fabric according to  claim 1  are adhered.