Use of optical brighteners from the class of the stilbene compounds as antimicrobially active substances

Abstract

Described is the use of a laundry detergent that includes at least one optical brightener from the class of the stilbene compounds for the antimicrobial finishing of textile fiber materials, which comprises washing the fiber materials with this laundry detergent and subsequently exposing the washed textile material to a light source.

What is claimed is:  
     
         1 . Use of a laundry detergent that includes at least one optical brightener from the class of the stilbene compounds for the antimicrobial finishing of textile fibre materials, which comprises washing the fibre materials with this laundry detergent and subsequently exposing the washed textile material to a light source.  
     
     
         2 . Use according to  claim 1 , wherein the washed textile materials are irradiated with UV light or in daylight in the moist state.  
     
     
         3 . Use according to  claim 1  or  2 , wherein an optical brightener used is a compound of the formula  
       
         
           
           
               
               
           
         
       
       wherein 
 R 1  is a radical of the formula  
                     
 R 3  is substituted or unsubstituted alkyl or aryl;  
 R 4  is M or substituted or unsubstituted alkyl or aryl;  
 R 5  is hydrogen; substituted or unsubstituted alkyl or aryl; or —NR 7 R 8 , wherein R 7  and R 8  are independently hydrogen; substituted or unsubstituted alkyl or aryl; or R 7  and R 8  combine with the joining nitrogen atom to form a heterocyclic radical, especially morpholino or piperidino radical;  
 R 6  is hydrogen or substituted or unsubstituted alkyl or aryl,  
 R 2  is hydrogen; substituted or unsubstituted alkyl or aryl; a radical of the formula  
                     
  —OH; —NH 2 ; —N(CH 2 CH 2 OH) 2 ; —N[CH 2 CH(OH)CH 3 ] 2 , —NH—R 4 , —N(R 4 ) 2  or —OR 4 ; or  
 R 1  and R 2  are independently —OH, —Cl; —NH 2 , —O —C 1 -C 4 alkyl, —O-aryl, —NH—C 1 -C 4 alkyl, —N(C 1 -C 4 alkyl) 2 , —N(C 1 -C 4 alkyl)(C 1 -C 4 hydroxyalkyl), —N(C 1 -C 4 hydroxyalky) 2 , or —NH-aryl, morpholino, S—C 1 -C 4 alkyl(aryl),  
 M is hydrogen, Na, K, Ca, Mg, ammonium, mono-, di-, tri- or tetra-C 1 -C 4 alkylammonium, mono-, di- or tri-C 1 -C 4 hydroxyalkylammonium or ammonium that is di- or trisubstituted with a mixture of C 1 -C 4 alkyl and C 1 -C 4 hydroxyalkyl groups; and  
 n 1  and n 2 , are independently 0 or 1.  
 
     
     
         4 . Use according to  claim 1  or  2 , wherein an optical brightener used is a compound of the formula  
       
         
           
           
               
               
           
         
       
       wherein 
 R 9  and R 10  are independently hydrogen, C 1 -C 4 alkyl, phenyl or a radical of the formula  
                     
  and  
 M is as defined in  claim 3 .  
 
     
     
         5 . Use according to  claim 1  or  2 , wherein an optical brightener used is a compound of the formula  
       
         
           
           
               
               
           
         
       
       wherein 
 R 11  is hydrogen, Cl or SO 3 M;  
 R 12  is —CN, —SO 3 M, —S(C 1 -C 4 alkyl) 2  or S(aryl) 2  and  
 M is as defined in  claim 3 .  
 
     
     
         6 . Use according to  claim 1  or  2 , wherein an optical brightener used is a compound of the formula  
       
         
           
           
               
               
           
         
       
       wherein 
 R 13  is hydrogen, —SO 3 M, —O—C 1 -C 4 alkyl, —CN, —Cl, —COO—C 1 -C 4 alkyl, or CON(C 1 -C 4 alkyl) 2 ; and  
 n 3  is 0 or 1, and  
 M is as defined in claim  31 .  
 
     
     
         7 . Use according to  claim 1  or  2 , wherein an optical brightener used is a compound of the formula  
       
         
           
           
               
               
           
         
       
       wherein 
 R 14  is hydrogen, C 1 -C 4 alkyl, Cl or —SO 3 M;  
 R 15  and R 16  are independently hydrogen, C 1 -C 4 alkyl, —SO 3 M, —Cl or —O—C 1 -C 4 alkyl and  
 M is as defined in  claim 3 .  
 
     
     
         8 . Use according to  claim 1  or  2 , wherein an optical brightener used is a compound of the formula  
       
         
           
           
               
               
           
         
       
     
     
         9 . Use according to  claim 1  or  2 , wherein an optical brightener used is a compound of the formula  
       
         
           
           
               
               
           
         
       
     
     
         10 . Use according to  claim 1  or  2 , wherein an optical brightener used is a compound of the formula  
       
         
           
           
               
               
           
         
       
       wherein 
 R 17  is hydrogen or C 1 -C 4 alkyl;  
 R 18  is hydrogen, C 1 -C 4 alkyl, —CN, —Cl, —COO—C 1 -C 4 alkyl, —CON(C 1 -C 4 alkyl) 2 , aryl or —O-aryl.  
 
     
     
         11 . Use according to any one of  claims 1  to  10 , wherein the textile fibre materials used are natural cellulose fibres  
     
     
         12 . Use of optical brighteners from the class of the stilbene compounds as antimicrobially active substances against microorganisms.  
     
     
         13 . Use according to  claim 12 , wherein the microorganisms are Gram-positive and Gram-negative bacteria.