Method for brightening textile materials

Abstract

A process for brightening textile materials by treatment with optical brighteners in an aqueous liquor, which comprises using from 20 to 80% by weight, each percentage being based on the sum total of all brightening compounds, of the compound I of which up to 40 mol % can be present as cis isomer, and also from 80 to 20% by weight of at least one compound II selected from and also from 0 to 30% by weight of at least one compound of the general formula III

1 . A process for brightening textile materials by treatment with optical brighteners in an aqueous liquor, which comprises using from 20 to 80% by weight, each percentage being based on the sum total of all brightening compounds, of the compound I  
     
       
         
         
             
             
         
       
       of which up to 40 mol % can be present as cis isomer, and also from 80 to 20% by weight of at least one compound II selected from the group consisting of  
       
         
           
           
               
               
           
         
       
       
         
           
           
               
               
           
         
       
       and also from 0 to 30% by weight of at least one compound of the general formula III  
       
         
           
           
               
               
           
         
       
       where R is selected from C 4 -C 10 -alkyl,  
       in the optional presence of one or more blue or violet shading dyes from the class of the anthraquinones, azo dyes or methine dyes.  
     
   
   
       2 . The process as claimed in  claim 1 , wherein from 20 to 70% by weight of the compound II p,o′ is used as well as from 20 to 80% by weight of the compound I and from 0 to 30% by weight of a compound of the general formula III.  
   
   
       3 . The process as claimed in  claim 1 , wherein from 20 to 70% by weight of the compound II m,p′ is used as well as from 20 to 80% by weight of the compound I and from 0 to 30% by weight of a compound of the general formula III.  
   
   
       4 . The process as claimed in  claim 1 , wherein from 20 to 70% by weight of the compound II p,o′ and from 10 to 50% by weight of the compound II m,p′ are used as well as from 20 to 70% by weight of the compound I and from 0 to 30% by weight of a compound of the general formula III.  
   
   
       5 . The process as claimed in  claim 1 , wherein from 30 to 60% by weight of the compound II p,o′ and from 10 to 30% by weight of the compound II o,o′ are used as well as from 30 to 60% by weight of the compound I and from 0 to 30% by weight of a compound of the general formula III.  
   
   
       6 . The process as claimed in  claim 1 , wherein from 20 to 60% by weight of the compound II p,o′, from 10 to 50% by weight of the compound II m,p′ and from 10 to 30% by weight of the compound II o,o′ are used as well as from 20 to 50% by weight of the compound I and from 0 to 30% by weight of a compound of the general formula III.  
   
   
       7 . The process as claimed in  claim 1 , wherein R is 2-ethylhexyl in the compound III.  
   
   
       8 . The process as claimed in  claim 1 , wherein from 0.5 to 200% by weight, based on the sum total of all brightening compounds, is additionally used of one or more dispersants.  
   
   
       9 . The process as claimed in  claim 1 , wherein the textile material is polyester.  
   
   
       10 . The process as claimed in  claim 1 , wherein the textile material is a blend containing from 45 to 90% by weight of polyester.  
   
   
       11 . A formulation comprising from 20 to 80% by weight, each percentage being based on the sum total of all brightening compounds, of the compound I,  
     
       
         
         
             
             
         
       
       from 20 to 70% by weight of at least one compound II selected from the group consisting of,  
       
         
           
           
               
               
           
         
       
       from 0 to 30% by weight of at least one compound of the formula III  
       
         
           
           
               
               
           
         
       
       and also in each case optionally  
       one or more blue or violet shading dyes from the class of the anthraquinones, azo dyes, methine dyes, violanthrones or indanthrones,  
       one or more dispersants, water and further additives.  
     
   
   
       12 . (canceled)  
   
   
       13 . A method of brightening at least one textile material, said method comprising applying said formulation as claimed in  claim 11  to said at least one textile material.