Composition and method to provide stain release and stain repellency properties to substrates

Abstract

The present invention provides a composition for treatment, the composition comprising a fluorinated compound and a phosphate ester having at least one hydrocarbon residue having at least 6 carbon atoms. There is further provided a method of treatment applying the composition to a substrate.

1 . Composition for treatment, the composition comprising a fluorinated compound and a phosphate ester having at least one hydrocarbon residue having at least 6 carbon atoms. 
     
     
         2 . Composition according to  claim 1  wherein said fluorinated compound and phosphate ester are dispersed or dissolved in an aqueous medium. 
     
     
         3 . Composition according to  claim 1  wherein said phosphate ester corresponds to the general formula: 
       
         
           
           
               
               
           
         
         wherein R 1  and R 2  each independently represent a hydrocarbon group of at least 6 carbon atoms, X represents a hydrocarbon linking group, z has a value of 1 to 5 and M represents a monovalent cation. 
       
     
     
         4 . Composition according to  claim 1  wherein said phosphate ester is a salt of a mono- or dialkyl phosphate ester acid wherein the alkyl group or groups each have at least 6 carbon atoms. 
     
     
         5 . Composition according to  claim 1  wherein the amount of solids is between 0.5% and 60%. 
     
     
         6 . Composition according to  claim 1  wherein the weight ratio of said fluorinated compound to said phosphate ester is between 90% and 10%. 
     
     
         7 . Composition according to  claim 1  wherein the fluorinated compound comprises one or more perfluorinated hydrocarbon residues having at least 3 carbon atoms. 
     
     
         8 . Composition according to  claim 7  wherein the perfluorinated hydrocarbon residues have 4 carbon atoms each. 
     
     
         9 . Composition according to  claim 1  wherein the fluorinated compound comprises an oligomeric residue of the formula:
   G-(M f ) j -(M h ) j —S-
 
 wherein G represents H or a residue of a free radical initiator, M f  represents a unit deriving from a fluorinated monomer, M h  represents a unit of a non-fluorinated monomer, i has a value of 1 to 20 and j has a value of 0 to 20 with the proviso that the sum of i+j is at least 2. 
 
     
     
         10 . Composition according to  claim 1  wherein the fluorinated compound corresponds to one of the following formulas:
   [(A) m -L] n R or (A) m [L-R] n , 
 wherein m is a value of 1 to 4, n is a value of 1 to 4, L represents a linking group, R is an aliphatic group and A is a fluorinated residue of the formula: 
 
       
         
           
           
               
               
           
         
       
       wherein a has a value of 1 to 100, b has a value of 0 to 100 with the sum of a and b being at least 2, R 1  and R 2  each independently represent H or an alkyl group of 1 to 4 carbon atoms, Q and Q′ each independently represent a covalent bond or an organic linking group, Rf represents a fluoroaliphatic group, Rh represents a non-fluorinated group and X 1  is H or the residue of a free radical initiator. 
     
     
         11 . Method of treatment wherein a composition according to  claim 1  is applied to at least part of a surface of a substrate. 
     
     
         12 . Method according to  claim 11  wherein said substrate is natural or man-made stone. 
     
     
         13 . Use of a composition according to  claim 1  for providing stain release or stain repellence properties to natural or man-made stone. 
     
     
         14 . Use according to  claim 13  for providing stain release or stain repellence properties against stains selected from the group of stains caused by oils, food dressings, wine, coffee, tea and soft drinks.