Masonry-treating agent

Abstract

A fluoropolymer for masonry treatment produced from (A) a fluoromonomer which has been substituted in the α-position by a X group and is represented by the formula (I): and (B) a monomer having a functional group reactive with active hydrogen. It imparts excellent water- and oil-repellency and unsusceptibility to fouling to masonries.

1 . A fluorine-containing polymer for masonry treatment, comprising: 
 (A) repeating units derived from a fluorine-containing monomer of the formula:                           wherein X is a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, a CFX 1 X 2  group (in which X 1  and X 2  are each a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom or an iodine atom), a cyano group, a linear or branched fluoroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted benzyl group, or a substituted or unsubstituted phenyl group;    Y is an aliphatic group having 1 to 10 carbon atoms, an aromatic or cycloaliphatic group having 6 to 10 carbon atoms, a —CH 2 CH 2 N(R 1 )SO 2 — group (in which R 1  is an alkyl group having 1 to 4 carbon atoms) or a —CH 2 CH(OY 1 )CH 2 — group (in which Y 1  is a hydrogen atom or an acetyl group); and    Rf is a linear or branched fluoroalkyl or fluroalkenyl group having 1 to 21 carbon atoms, or a fluoroether group having totally 1 to 200 repeating units selected from the group consisting of the repeating units: —C 3 F 6 O—, —C 2 F 4 O— and —CF 2 O—, and    (B) repeating units derived from a monomer having a functional group reactive with active hydrogen.    
   
   
       2 . The fluorine-containing polymer according to  claim 1 , wherein, in the monomer having a functional group reactive with active hydrogen (B), the functional group is at least one selected from the group consisting of a silane group, a phosphate group, a carboxylate group, sulfate group and a glycidyl group.  
   
   
       3 . The fluorine-containing polymer according to  claim 1 , wherein the monomer having a functional group reactive with active hydrogen (B) is a silane compound having a carbon-carbon double bond.  
   
   
       4 . The fluorine-containing polymer according to  claim 1 , wherein the Rf group in the fluorine-containing monomer (A) is a fluoroalkyl or fluoroalkenyl group having 1 to 6 carbon atoms.  
   
   
       5 . The fluorine-containing polymer according to  claim 1 , which comprises the fluorine-containing monomer (A), the monomer having a finctional group reactive with active hydrogen (B), and (C) a fluorine-free alkyl group-containing monomer.  
   
   
       6 . A composition for treating a masonry, which comprises the fluorine-containing polymer according to  claim 1 , and an organic solvent.  
   
   
       7 . A method of producing a treated masonry, which comprises applying the composition according to  claim 6  to a surface of a masonry, and then eliminating the organic solvent.  
   
   
       8 . A masonry produced by the method according to  claim 7.