Aqueous water and oil repellent composition

Abstract

An aqueous water and oil repellent composition is produced by emulsifying a an acrylate or methacrylate copolymer containing perfluoroalkyl or perfluoroalkenyl group in the presence of a quaternary ammonium compound in an aqueous medium containing an organic cosolvent which gives a stable dispersion and imparts excellent water and oil repellent properties to the textile and carpets.

1 . An aqueous water and oil repellent composition which comprises:
 a. An acrylate or methacrylate copolymer containing perfluoroalkyl or perfluoroalkenyl group.   b. A surfactant comprising a quaternary ammonium compound   c. An aqueous medium containing an organic co-solvent   
     
     
         2 . The composition of  claim 1  wherein said copolymer compound comprises a repeat unit derived from a fluoroalkyl group-containing monomer, a fluoroalkyl group containing maleate or fumarate. 
     
     
         3 . A method of manufacturing said copolymer of  claim 1  wherein a perfluoroalky or perfluoroalkenyl group monomer is polymerized with ethylenically unsaturated monomers, mixed with a chain transfer agent, said surfactant of  claim 1  and emulsified in the medium of an organic cosolvent. 
     
     
         4 . The method of  claim 2  wherein said perfluoroalkyl or perfluoroalkenyl group containing acrylate or methacrylate groups is selected from the group of compounds comprising:
 a. CF 3 (CF 2 ) 7 (CH 2 ) 10 OCOCH═CH 2 ,   b. CF 3 (CF 2 ) 7 (CH 2 ) 10 OCOC(CH 3 )═CH 2 ,   c. CF 3 (CF 2 ) 6 CH 2 OCOCH═CH 2 ,   d. (CF 3 ) 2 CF(CF 2 ) 10 (CH 2 ) 2 OCOCH═CH 2 ,   e. (CF 3 ) 2 CF(CF 2 ) 6 (CH 2 )OCOC(CH 3 )═CH 2 ,   f. (CF 3 ) 2 CF(CF 2 ) 8 (CH 2 ) 2 OCOC(CH 3 )═CH 2 ,   g. CF 3 CF 2 (CF 2 ) 6 (CH 2 ) 2 OCOCH═CH 2 ,   h. CF 3 CF 2 (CF 2 ) 8 (CH 2 ) 2 OCOCH═CH 2 ,   i. CF 3 CF 2 (CF 2 ) 10 (CH 2 ) 2 OCOCH═CH 2 ,   j. CF 3 CF 2 (CF 2 ) 6 (CH 2 ) 2 OCOC(CH 3 )═CH 2 ,   k. CF 3 CF 2 (CF 2 ) 10 (CH 2 ) 2 OCOC(CH 3 )═CH 2 ,   l. CF 3 (CH 2 ) 7 SO 2 N(CH 3 )(CH 2 ) 2 OCOCH═CH 2 , and   m. (CF 3 ) 2 CF(CF 2 ) 6 CH 2 CH(OH)CH 2 OCOCH═CH 2      
     
     
         5 . The method of  claim 2  wherein the concentration of said perfluoroalkyl or perfluoroalkenyl group is 40 to 95% by weight. 
     
     
         6 . The method of  claim 2  wherein polymerization is carried out within the temperature range of 50 to 160° C. 
     
     
         7 . The method of  claim 2  wherein said ethylenically unsaturated monomer is selected from a group comprising (a) acrylic acid and methacrylic acid, and methyl, ethyl, propyl, 2-ethylhexyl, hexyl, decyl, lauryl, cetyl, stearyl, isobornyl, β-hydroxyethyl, glycidyl, phenyl, benzyl esters thereof (b) vinyl esters of fatty acid, propionic acid, caprylic acid, lauric acid and stearic acid (c) styrene compounds (d) vinyl halides (e) vinyl alkyl ketones (f) acryl amides and (g) dienes. 
     
     
         8 . The method of  claim 1  wherein said chain transfer agent is selected from a group comprising mercaptans or alkyl mercaptans. 
     
     
         9 . The method of  claim 2  wherein said organic solvent is selected from a group comprising propylene glycol, dipropylene glycol and dipropylene glycol mono-methyl ether. 
     
     
         10 . The composition of  claim 1  wherein said quaternary ammonium compound is selected from a group comprising of dialkyl(C 12 -C 22 )dimethyl ammonium chloride, alkyldimethyl benzayl ammonium chloride, octadecyltrimethyl ammonium chloride, dialkyl(tallow)dimethylammonium chloride, dodecyltrimethylammonium chloride, hexadecyltrimethyl ammonium chloride, biphenyltrimethylammonium chloride, alkylimidazoline quaternary salt, octadecyldimethylbenzylammonium chloride, polyoxyethylenedodecylmonomethylammonium chloride and 1-hydroxyethyl-2-alkylimidazoline quaternary salt. 
     
     
         11 . The composition of  claim 1  wherein the concentration of said of quaternary compound is from 0.01 to 10 parts by weight of the polymer. 
     
     
         12 . A method of processing a textile, comprising treating the textile with said repellent composition according to  claim 1 , comprising steps of: (1) preparing a treatment composition by diluting said repellent, (2) applying the treatment composition to a textile, and (3) washing the textile with water and (4) dehydrating the textile. 
     
     
         13 . The method of  claim 10  wherein said treatment composition is dilute to 0.1 to 3% using water.