Method of improving thermal stability

Abstract

The invention relates to a method of improving the thermal stability of natural or synthetic polyamide fibre materials that are undyed, fluorescent whitened or dyed with reactive or disperse dyes, with the exception of metal complex dyes, wherein the fibre material is treated with a liquor comprising a compound of formula (1) Y 1 —X—Y 2 (1) wherein X is a divalent aliphatic or cycloaliphatic radical and Y 1 and Y 2 are each independently of the other —OH, —CO—OR 1 , —NR 1 R 2 , —CO—NH—NR 1 R 2 or —NH—CO—NH—NR 1 R 2 , wherein R 1 and R 2 are each independently of the other hydrogen; Q-Ĉalkyl unsubstituted or substituted by one or more hydroxy, amino or carboxyl groups or halogen atoms; C 5 -C 24 -aryl unsubstituted or substituted by one or more hydroxy, amino or carboxyl groups or halogen atoms; C 6 -C 36 aralkyl unsubstituted or substituted by one or more hydroxy, amino or carboxyl groups or halogen atoms; or C 5 -C 24 cycloalkyl unsubstituted or substituted by one or more hydroxy, amino or carboxyl groups or halogen atoms.

1 . A method of improving the thermal stability of natural or synthetic polyamide fibre materials that are undyed, fluorescent whitened or dyed with reactive or disperse dyes, with the exception of metal complex dyes, wherein the fibre material is treated with a liquor comprising a compound of formula (I)
   Y 1 —X—Y 2   (1)   wherein X is a divalent aliphatic or cycloaliphatic radical and   Y 1  and Y 2  are each independently of the other —OH, —CO—OR 1 , —NR 1 R 2 , —CO—NH—NR 1 R 2  or —NH—CO—NH—NR 1 R 2 ,   wherein R 1  and R 2  are each independently of the other hydrogen; C 1 -C 12  alkyl unsubstituted or substituted by one or more hydroxy, amino or carboxyl groups or halogen atoms; C 5 -C 24  aryl unsubstituted or substituted by one or more hydroxy, amino or carboxyl groups or halogen atoms; C 6 -C 36  aralkyl unsubstituted or substituted by one or more hydroxy, amino or carboxyl groups or halogen atoms; or C 5 -C 24  cycloalkyl unsubstituted or substituted by one or more hydroxy, amino or carboxyl groups or halogen atoms.   
   
   
       2 . A method according to  claim 1  wherein X is ethylene, tetramethylene, hexamethylene or octamethylene. 
   
   
       3 . A method according to  claim 1  wherein Y 1  and Y 2  are —NR 1 R 2 , —CO—NH—NR 1 R 2  or —NH—CO—NH—NR 1 R 2 , wherein R 1  and R 2  are hydrogen, C 1 -C 12  alkyl or C 5 -C 24  aryl. 
   
   
       4 . A method according to  claim 1  wherein Y 1  and Y 2  are —NR 1 R 2 , —CO—NH—NR 1 R 2  or —NH—CO—NH—NR 1 R 2 , wherein R 1  and R 2  are hydrogen, methyl or phenyl. 
   
   
       5 . A method according to  claim 1  wherein the compound of formula (1) is a compound of formula (101)-(104) 
     
       
         
         
             
             
         
       
     
   
   
       6 . A method according to  claim 1  wherein the compound of formula (1) is present in the liquor in an amount of from 0.1 g/l to 100 g/l. 
   
   
       7 . A method according to  claim 1  wherein the treatment of the fibre material with the liquor comprising a compound of formula (1) is effected by the pad-dyeing process. 
   
   
       8 . A method according to  claim 1  wherein fluorescent whitened polyamide fibre material is treated. 
   
   
       9 . A method according to  claim 1  wherein polyamide fibre material that has been dyed with reactive or disperse dyes, with the exception of metal complex dyes, is treated. 
   
   
       10 . A method of improving the fastness to ozone, NO x  and chlorine of natural or synthetic polyamide fibre material that is undyed, fluorescent whitened or dyed with reactive or disperse dyes, with the exception of metal complex dyes, wherein the fibre material is treated with a liquor comprising a compound of formula (1)
   Y 1 —X—Y 2   (1)   wherein X is a divalent aliphatic or cycloaliphatic radical and   Y 1  and Y 2  are each independently of the other —OH, —CO—OR 1 , —NR 1 R 2 , —CO—NH—NR 1 R 2  or —NH—CO—NH—NR 1 R 2 ,   wherein R 1  and R 2  are each independently of the other hydrogen; C 1 -C 12  alkyl unsubstituted or substituted by one or more hydroxy, amino or carboxyl groups or halogen atoms C 5 -C 24  aryl unsubstituted or substituted by one or more hydroxy, amino or carboxyl groups or halogen atoms; C 6 -C 36  aralkyl unsubstituted or substituted by one or more hydroxy, amino or carboxyl groups or halogen atoms; or C 5 -C 24  cycloalkyl unsubstituted or substituted by one or more hydroxy, amino or carboxyl groups or halogen atoms.