Thickener Containing A Cationic Polymer And Softening Composition Containing Said Thickener, In Particular For Textiles

Abstract

A softening composition includes at least one thickener containing a cationic polymer obtained by polymerization: of a cationic monomer; of a monomer with a hydrophobic nature, of formula (I): wherein R1=H or CH 3 R2=alkyl chain having at least 16 carbon atoms X═O, m≧5, y=z=0, or X═NH,m≧z≧5, y=0, or X═NH, m≧y≧5, z=0, of a nonionic monomer.

1 . A softening composition comprising at least one thickener containing a cationic polymer obtained by polymerization:
 of a cationic monomer;   of a monomer with a hydrophobic nature, of formula (I):   
       
         
           
           
               
               
           
         
       
       wherein
 R1=H or CH 3    
 R2=alkyl chain having at least 16 carbon atoms 
 X═O, m≧5, y=z=0, or 
 X═NH, m≧z≧5, y=0, or 
 X═NH, m≧y≧5, z=0;
 of a nonionic monomer. 
 
 
     
     
         2 . The softening composition according to  claim 1 , characterized in that the thickener consists of a cationic terpolymer obtained by polymerization:
 of a cationic monomer;   of a monomer with a hydrophobic nature, of formula (I):   
       
         
           
           
               
               
           
         
       
       wherein
 R1=H or CH 3    
 R2=alkyl chain having at least 16 carbon atoms 
 X═O, m≧5, y=z=0, or 
 X═NH, m≧z≧5, y=0, or 
 X═NH, m≧y≧5, z=0;
 of a nonionic monomer. 
 
 
     
     
         3 . The softening composition according to  claim 1 , characterized in that the hydrophobic monomer is selected from the group consisting of: ethoxylated cetyl methacrylate (E0 25), ethoxylated behenyl methacrylate (EO 25) and mixtures of these compounds. 
     
     
         4 . The softening composition according to  claim 1 , characterized in that the hydrophobic monomer is ethoxylated behenyl methacrylate (EO 25). 
     
     
         5 . The softening composition according to  claim 1 , characterized in that the a content of hydrophobic monomer represents between 0.1% by weight and 20% by weight relative to the weight of the cationic polymer. 
     
     
         6 . The softening composition according to  claim 1 , characterized in that the cationic monomer is selected from the group consisting of: diallyldialkylammonium salts; acidified or quaternized salts of dialkylaminoalkyl acrylates and methacrylates; and acidified or quaternized salts of dialkyl-aminoalkylacrylamides or methacrylamides. 
     
     
         7 . The softening composition according to  claim 1 , characterized in that the content of cationic monomer represents between 25% by weight and 99.9% by weight relative to the weight of the cationic polymer. 
     
     
         8 . The softening composition according to  claim 1 , characterized in that the cationic polymer is crosslinked in the presence of a crosslinking agent selected from the group consisting of: methylenebisacrylamide (MBA), ethylene glycol diacrylate, polyethylene glycol dimethacrylate, diacrylamide, cyanomethyl acrylate, vinyloxyethyl acrylate or methacrylate, triallylamine, formaldehyde, glyoxal, compounds of glycidyl ether type, epoxies, and mixtures of these compounds. 
     
     
         9 . The softening composition according to  claim 8 , characterized in that the cationic polymer is crosslinked in the presence of a transfer agent selected from the group consisting of isopropyl alcohol, sodium hypophosphite, mercaptoethanol and mixtures of these compounds. 
     
     
         10 . The softening composition according to  claim 1 , characterized in that the cationic polymer is obtained by inverse emulsion polymerization. 
     
     
         11 . The softening composition according to  claim 1 , characterized in that the cationic polymer is in the form of an inverse emulsion comprising an oily phase, an aqueous phase, at least one water-in-oil (W/O) emulsifier, at least one oil-in-water (O/W) emulsifier and from 20% to 60% by weight of said cationic polymer. 
     
     
         12 . The softening composition according to  claim 1 , characterized in that the cationic polymer is obtained by polymerization:
 of chloromethylated dimethylaminoethyl methacrylate;   of acrylamide; and   of ethoxylated behenyl methacrylate (EO 25).   
     
     
         13 . The softening composition according to  claim 1 , characterized in that the cationic polymer is obtained by polymerization:
 of chloromethylated dimethylaminoethyl methacrylate;   of acrylamide; and   of ethoxylated cetyl methacrylate (EO 25).   
     
     
         14 . The softening composition according to  claim 1 , characterized in that the content of thickener represents 0.05% to 10% relative to the weight of the softening composition. 
     
     
         15 . The softening composition according to  claim 5 , characterized in that the content of hydrophobic monomer represents between 0.5% by weight and 5% by weight relative to the weight of the cationic polymer. 
     
     
         16 . The softening composition according to  claim 6 , characterized in that the cationic monomer is diallyldimethylammonium chloride (DADMAC). 
     
     
         17 . The softening composition according to  claim 6 , characterized in that the cationic monomer is selected from the group consisting of acidified or quaternized salts of dialkylaminoethyl acrylate (ADAME) and acidified or quaternized salts of dialkylaminoethyl methacrylate (MADAME). 
     
     
         18 . The softening composition according to  claim 6 , characterized in that the cationic monomer is selected from the group consisting of methacrylamidopropyltrimethylammonium chloride (MAPTAC), acrylamidopropyltrimethylammonium chloride (APTAC) and the Mannich products. 
     
     
         19 . The softening composition according to  claim 18 , characterized in that the Mannich product is a quaternized dialkylaminomethylacrylamide. 
     
     
         20 . The softening composition according to  claim 7 , characterized in that a content of cationic monomer represents between 50% by weight and 99.5% by weight relative to the weight of the cationic polymer. 
     
     
         21 . The softening composition according to  claim 11 , characterized in that the cationic polymer is in the form of an inverse emulsion comprising from 40% to 55% by weight of said cationic polymer. 
     
     
         22 . The softening composition according to  claim 14 , characterized in that the content of thickener represents 0.1% to 5% relative to the weight of the softening composition.