Method of Dyeing Polyester

Abstract

The present invention relates to a method of dyeing polyester-containing textile material characterised in that the textile material is treated with a liquor containing (a) at least one disperse dye and (b) at least one compound of the formula (1), wherein G 1 and G 2 , independently of one another, are C 1 -C 4 alkyl or together are pentamethylene, Z 1 and Z 2 are methyl, Or Z 1 and Z 2 together form a bridging member which is unsubstituted or substituted by an ester, ether, hydroxyl, oxo, cyanohydrin, amido, amino, carboxyl or urethane radical, and E is oxyl or hydroxyl.

1 . A method of dyeing polyester-containing textile material characterised in that the textile material is treated with a liquor containing
 (a) at least one disperse dye and   (b) at least one compound of the formula   
       
         
           
           
               
               
           
         
         wherein 
         G 1  and G 2 , independently of one another, are C 1 -C 4  alkyl or together are pentamethylene, 
         Z 1  and Z 2  are methyl, or Z 1  and Z 2  together form a bridging member which is unsubstituted or substituted by an ester, ether, hydroxyl, oxo, cyanohydrin, amino, amino, carboxyl or urethane radical, and 
         E is oxyl or hydroxyl. 
       
     
     
         2 . A method according to  claim 1 , wherein the textile material is treated with a liquor containing as component (a) a compound of formula 
       
         
           
           
               
               
           
         
         wherein R 1  denotes C 1 -C 4  alkyl, 
         R 2  is hydrogen, bromo, chloro, cyano or nitro, 
         R 3  is promo, chloro, cyano or nitro, 
         R 4  is hydrogen, methyl or methoxy, 
         R 5  and R 6 , independently of one another, are ethyl, benzyl, 2-cyanoethyl, 2-hydroxyethyl, 2-methoxyethyl, 2-ethoxyethyl, 2-(2-methoxyethoxy)-ethyl, 2-(2-ethoxyethoxy)-ethyl, 2-acetyloxyethyl, methoxycarbonylmethyl, ethoxycarbonylmethyl, 1-methoxycarbonylethyl or 1-ethoxycarbonylethyl, 
         R 7  is hydrogen, bromo, chloro, cyano or nitro, 
         R 8  is bromo, chloro, cyano or nitro, 
         R 9  is methyl or ethyl and 
         R 10  is hydrogen, methyl, methoxy, acetylamino or propionylamino. 
       
     
     
         3 . A method according to  claim 1 , wherein the textile material is treated with a liquor containing as component (a) a compound of formula 
       
         
           
           
               
               
           
         
       
     
     
         4 . A method according to  claim 1 , wherein the textile material is treated with a liquor containing as component (b) a compound of the formula 
       
         
           
           
               
               
           
         
         wherein E is oxyl or hydroxyl, 
         R 11  is hydrogen or methyl and 
         n=1 or 2, 
         wherein if n=1 
         Y is hydrogen, C 1 -C 18  alkyl, C 2 -C 10  alkenyl, propargyl, glycidyl or C 2 -C 50  alkyl which is unsubstituted or substituted by 1-10 hydroxyl groups and which may be interrupted by 1-20 oxygen atoms, or 
         Y is C 1 -C 4  alkyl substituted by —COOR 12 , in which R 12  is hydrogen, C 1 -C 4  alkyl or phenyl, 
         and wherein if n=2, 
         Y is C 1 -C 12  alkylene, C 4 -C 12  alkenylene, xylylene or C 1 -C 50  alkylene, which is unsubstituted or substituted by 1-10 hydroxyl groups and which may be interrupted by 1-20 oxygen atoms. 
       
     
     
         5 . A method according to  claim 1 , wherein the textile material is treated with a liquor containing as component (b) 1-oxyl-2,2,6,6-tetramethyl-4-hydroxypiperidine of the formula 
       
         
           
           
               
               
           
         
       
     
     
         6 . A method according to  claim 1 , wherein the textile material is treated with a liquor additionally containing a lignin sulfonate. 
     
     
         7 . A method according to  claim 1 , wherein the textile material is polyester or a polyester/cotton blend. 
     
     
         8 . A method according to  claim 1 , wherein the treatment with the dyeing liquor is followed by a reductive after-treatment. 
     
     
         9 . A method according to  claim 8  wherein sodium hydrosulfite is used in the reductive after-treatment step.