Aqueous dispersions for hydrophobically finishing fibres and flat textile materials

Abstract

Aqueous dispersions containing at least: a) a copolymer of compounds corresponding to formula (I): R 1 —O—CO—CR 2 ═CH 2   (I),  in which R 1 is a branched or unbranched alkyl group containing 8 to 22 carbon atoms and R 2 is a hydrogen atom or an alkyl group containing 1 to 4 carbon atoms, with monomers selected from compounds corresponding to formula (Ia): R 3 —O—CO—CR 4 ═CH 2   (Ia),  in which R 3 is a branched or unbranched alkyl group containing 1 to 6 carbon atoms and R 4 is a hydrogen atom or an alkyl group containing 1 to 4 carbon atoms, and b) a copolymer of compounds corresponding to formula (II): C n F 2n —CH 2 —CH 2 —O—CO—CR 5 ═CH 2   (II),  in which R 5 is a hydrogen atom or an alkyl group containing 1 to 4 carbon atoms and n is a number of 4 to 12, with monomers selected from compounds corresponding to formula (Ia), and c) emulsifiers, with the proviso that the ratio by weight between the copolymers a) and the copolymers b) is 10:1 to 1:10.

1 - 13 . (canceled)  
   
   
       14 . An aqueous dispersion comprising: 
 a) a copolymer comprising constituent units provided by monomers of the formula:      R 1 -0-CO—CR 2 ═CH2  (I),  in which R 1  is a branched or unbranched alkyl group containing 8 to 22 carbon atoms and R 2  is a hydrogen atom or an alkyl group containing 1 to 4 carbon atoms, and constituent units provided by monomers of the formula:      R 3 —O—CO—CR 4 ═CH 2   (Ia),    in which R 3  is a branched or unbranched alkyl group containing 1 to 6 carbon atoms and R 4  is a hydrogen atom or an alkyl group containing 1 to 4 carbon atoms; and      b) a copolymer comprising constituent units provided by monomers of the formula      C n F 2n+1 —CH 2 —CH 2 —O—CO—CR 5 ═CH 2   (II),  in which R 5  is a hydrogen atom or an alkyl group containing 1 to 4 carbon atoms and n is a number of 4 to 12, and constituent units provided by monomers of the formula (Ia); and      c) an emulsifier, wherein, the ratio by weight of the copolymer a) and the copolymer b) is 10:1 to 1:10.    
   
   
       15 . The aqueous dispersions as claimed in  claim 14 , wherein, the copolymers a) contain constituent units provided by monomers of the formula (I) where R 1  is a linear alkyl group containing 12 to 18 carbon atoms.  
   
   
       16 . The aqueous dispersion as claimed in  claim 14 , wherein, the copolymer b) contains constituent units provided by monomers of formula (II) where n is a number of 6 to 10.  
   
   
       17 . The aqueous dispersion as claimed in  claim 14 , wherein, the ratio by weight of copolymers a) to copolymers b) is 5:1 to 1:3.  
   
   
       18 . The aqueous dispersion as claimed in  claim 14 , wherein, the ratio by weight of copolymers a) to copolymers b) is 3:1 to 1:1.  
   
   
       19 . The aqueous dispersion as claimed in  claim 14 , wherein, at least 50% by weight of the constituent units in the copolymer a) is provided by monomers of the formula (I).  
   
   
       20 . The aqueous dispersion as claimed in  claim 14 , wherein, at least 70% by weight of the constituent units in the copolymer a) is provided by  
   
   
       21 . The aqueous dispersion as claimed in  claim 14 , wherein, at least 50% by weight of the constituent units in the copolymer b) is provided by monomers of the formula (II).  
   
   
       22 . The aqueous dispersion as claimed in  claim 14 , wherein, the monomers of formula (Ia) independently of one another comprise at least one member selected from the group consisting of methyl, ethyl, n-propyl, i-propyl and butyl esters of acrylic or methacrylic acid.  
   
   
       23 . The aqueous dispersion as claimed in  claim 14 , wherein, the emulsifier comprises at least one member selected from the group consisting of nonionic and cationic emulsifiers.  
   
   
       24 . The aqueous dispersion as claimed in  claim 14 , wherein, a sum of the weight of copolymers a) and b) comprises from 0.1% to 50% by weight of the dispersion, based on a total weight of the dispersion.  
   
   
       25 . The aqueous dispersion as claimed in  claim 14 , wherein, a sum of the weight of copolymers a) and b) comprises from 1% to 35% by weight of the dispersion, based on a total weight of the dispersion.  
   
   
       26 . The aqueous dispersion as claimed in  claim 14  which contains emulsifiers in a quantity of 0.1 to 10% by weight, based on the total weight of the dispersion.  
   
   
       27 . The aqueous dispersion as claimed in  claim 14 , which further comprises a water-miscible organic solvent.  
   
   
       28 . The aqueous dispersion as claimed in  claim 27 , wherein, the solvent comprises at least one member selected from the group consisting of polyols containing 2 to 6 carbon atoms and 2 to 6 hydroxyl groups, alkyl ethers or partial alkyl ethers of these polyols, partly or completely alkoxylated derivatives of these polyols, and acetone.  
   
   
       29 . A fiber or a flat textile comprising a hydrophobic finish comprising a dried polymer dispersion of  claim 14 .  
   
   
       30 . The aqueous dispersion as claimed in  claim 14  which contains emulsifiers in a quantity of 0.5% to 5% by weight, based on the total weight of the dispersion.  
   
   
       31 . The aqueous dispersion as claimed in  claim 15 , wherein, the copolymer b) contains constituent units provided by monomers of formula (II) where n is a number of 6 to 10.  
   
   
       32 . The aqueous dispersion as claimed in  claim 15 , wherein, the ratio by weight of copolymers a) to copolymers b) is 5:1 to 1:3.  
   
   
       33 . The aqueous dispersion as claimed in  claim 16 , wherein, the ratio by weight of copolymers a) to copolymers b) is 5:1 to 1:3.