To provide a water/oil repellent composition whereby it is possible to obtain an article which is excellent in each of water repellency, oil repellency and heavy rain durability, a method for its production, and an article which is excellent in each of water repellency, oil repellency, heavy rain durability and texture. The water/oil repellent composition comprises a copolymer containing structural units based on a monomer (a), structural units based on a monomer (b) and structural units based on a monomer (c). Here, the monomer (a) is a compound represented by (ZY).sub.nX (wherein Z is a C.sub.1-6perfluoroalkyl group, etc.; Y is a bivalent organic group, etc.; n is 1 or 2; and X is a polymerizable unsaturated group). The monomer (b) is a (meth)acrylate having no polyfluoroalkyl group and having an alkyl group with at least 12 carbon atoms. The monomer (c) is a monomer having a poly(oxypolyfluoroalkylene) chain.

To provide a water/oil repellent composition whereby it is possible to obtain an article which is excellent in each of water repellency, oil repellency and heavy rain durability, a method for its production, and an article which is excellent in each of water repellency, oil repellency, heavy rain durability and texture. The water/oil repellent composition comprises a copolymer containing structural units based on a monomer (a), structural units based on a monomer (b) and structural units based on a monomer (c). Here, the monomer (a) is a compound represented by (ZY).sub.nX (wherein Z is a C.sub.1-6perfluoroalkyl group, etc.; Y is a bivalent organic group, etc.; n is 1 or 2; and X is a polymerizable unsaturated group). The monomer (b) is a (meth)acrylate having no polyfluoroalkyl group and having an alkyl group with at least 12 carbon atoms. The monomer (c) is a monomer having a poly(oxypolyfluoroalkylene) chain.

A ventilation insert for textiles, with at least one layer, covered at least partially by an absorption material and having ventilation openings, the openings being at least partially closeable via a liquid by swelling of the absorption material, obtainable by: a) treating a layer having ventilation openings with a mixture, containing a wetting agent, initiator, polymerizable monomer or oligomers, and a cross-linking agent, as a preliminary stage for the absorption material; and b) polymerizing the monomer or oligomer to form the absorption material while forming a bonded connection between the absorption material and the layer. The ventilation insert has a relatively low thickness, a low weight per unit area, and high flexibility permanently and independently of moisture after economical production, via one layer, self-sealingly closing ventilation openings, and containing the absorption material. The absorption material is connected to the layer by bonding, at least in some regions.

A ventilation insert for textiles, with at least one layer, covered at least partially by an absorption material and having ventilation openings, the openings being at least partially closeable via a liquid by swelling of the absorption material, obtainable by: a) treating a layer having ventilation openings with a mixture, containing a wetting agent, initiator, polymerizable monomer or oligomers, and a cross-linking agent, as a preliminary stage for the absorption material; and b) polymerizing the monomer or oligomer to form the absorption material while forming a bonded connection between the absorption material and the layer. The ventilation insert has a relatively low thickness, a low weight per unit area, and high flexibility permanently and independently of moisture after economical production, via one layer, self-sealingly closing ventilation openings, and containing the absorption material. The absorption material is connected to the layer by bonding, at least in some regions.

Use for sizing textile materials with an aqueous sizing composition including at least one co-polymer obtained by the polymerization of at least one non-ionic monomer and/or one anionic monomer, and at least one monomer of formula (I): ##STR00001##
in which: R.sub.1 is an atom of hydrogen or a methyl radical; x=0 or 1; Z is a divalent grouping C(O)O, C(O)NH, or CH.sub.2; n is an integer between 1 and 250; R.sub.2 is a hydrogen atom or a carbonated radicalsaturated or unsaturated, possibly aromatic, linear, ramified or cyclicincluding from 1 to 30 carbon atoms and from 0 to 4 hetero-atoms chosen from the group including O, N and S.

Use for sizing textile materials with an aqueous sizing composition including at least one co-polymer obtained by the polymerization of at least one non-ionic monomer and/or one anionic monomer, and at least one monomer of formula (I): ##STR00001##
in which: R.sub.1 is an atom of hydrogen or a methyl radical; x=0 or 1; Z is a divalent grouping C(O)O, C(O)NH, or CH.sub.2; n is an integer between 1 and 250; R.sub.2 is a hydrogen atom or a carbonated radicalsaturated or unsaturated, possibly aromatic, linear, ramified or cyclicincluding from 1 to 30 carbon atoms and from 0 to 4 hetero-atoms chosen from the group including O, N and S.

An aqueous dispersion of a fluorine-containing copolymer comprising, as copolymerization units, (A) a (meth)acrylate represented by [CH.sub.2CHRCOO(NH).sub.rR.sub.1NR.sub.2R.sub.3R.sub.4].sup.+Y.sup., (B) a perfluoroalkylalkyl(meth)acrylate represented by C.sub.mF.sub.2m+1C.sub.pH.sub.2p(NRSO.sub.2).sub.qOCOCRCH.sub.2 or a polyfluoroalkylalkyl(meth)acrylate thereof, or a polyfluoroalkyl(meth)acrylate represented by C.sub.nF.sub.2n+1(CH.sub.2CF.sub.2).sub.a(CF.sub.2CF.sub.2).sub.b(CH.sub.2CH.sub.2).sub.cOCOCRCH.sub.2, (C) benzyl(meth)acrylate, (D) a fluorine-free polymerizable monomer other than components (A) and (C), and (E) a crosslinkable group-containing polymerizable monomer. The aqueous dispersion can improve the dispersion stability of an aqueous dispersion of a water- and oil-repellent when used as a water- and oil-repellent comprising the fluorine-containing copolymer as an active component.

A textile having high fluorine adhesion rate, and excellent water- and oil-repellency can be obtained by a method of producing a treated textile, comprising steps of: (1) preparing a treatment liquid comprising a water- and oil-repellent agent which comprises at least one fluorine-containing compound selected from the group consisting of a fluorine-containing polymer or a fluorine-containing low molecular weight compound, (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 treatment liquid comprises a thermally gelling substance.

A textile having high fluorine adhesion rate, and excellent water- and oil-repellency can be obtained by a method of producing a treated textile, comprising steps of: (1) preparing a treatment liquid comprising a water- and oil-repellent agent which comprises at least one fluorine-containing compound selected from the group consisting of a fluorine-containing polymer or a fluorine-containing low molecular weight compound, (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 treatment liquid comprises a thermally gelling substance.

A water/oil repellent composition which comprises a copolymer (A) comprising from 40 to 95 mass % of monomer (a1) units, from 1 to 60 mass % of monomer (a2) units and from 0 to less than 5 mass % of monomer (a3) units, a copolymer (B) comprising from 40 to 91 mass % of monomer (b1) units, from 2 to 20 mass % of monomer (b2) units, from 5 to 20 mass % of monomer (b3) units, and from 2 to 20 mass % of vinyl chloride (b4) units, and a liquid medium (C), wherein monomers (a1) and (b1) are (ZY).sub.nX [Z is a C.sub.1-6 polyfluoroalkyl group, etc., Y is a divalent organic group having no fluorine atom, etc., n is 1 or 2, and X is a specific group having a polymerizable unsaturated group], monomers (a2) and (b2) are vinylidene chloride or vinylidene fluoride, and monomers (a3) and (b3) are a (meth)acrylate having a saturated hydrocarbon group having at least 12 carbon atoms.