Polyester-ether resin blends

Abstract

The present application relates to novel polyester-ether compositions and their use as oxygen scavenging materials in polyester resins.

1 - 13 . (canceled) 
     
     
         14 . A masterbatch for use in preparing an article, preform or container comprising:
 a) copolyester-ether,
 wherein the copolyester-ether comprises one or more polyester segments and one or more polyether segments, wherein the one or more polyether segments are present in an amount of about 5 to about 95 wt.-% of the copolyester-ether; and 
   b) a monomeric, oligomeric or polymeric hindered amine light stabilizer (HALS) in an amount of 100-30,000 ppm, on basis of the weight of the stabilizer in the total composition, wherein the HALS is represented by the formula (I) or a mixture of compounds of formula (I),   
       
         
           
           
               
               
           
         
         
           wherein each R 1  independently represents C 1 -C 4  alkyl, R 2  represents H, C 1 -C 4  alkyl, OH, O—C 1 -C 4  alkyl, or a further part of an oligomeric or polymeric HALS, and R 3  represents a further part of a monomeric, oligomeric or polymeric HALS; wherein the masterbatch does not contain inorganic pigments in an amount of above 0.6 wt.-% of the total masterbatch and wherein the masterbatch does not contain carbon black in an amount of above 1.2 wt.-% of the total masterbatch. 
         
       
     
     
         15 . The masterbatch of  claim 14 , wherein the polyether segment is a linear or branched poly (C 2 -C 6 -alkylene glycol) segment. 
     
     
         16 . The masterbatch of  claim 14 , wherein the polyether segment a linear or branched poly(propylene glycol) or a linear or branched poly(butylene glycol) segment. 
     
     
         17 . The masterbatch of  claim 14 , wherein the polyether segment has a number-average molecular weight from 200 to about 5000 g/mol, preferably about 600 to about 2500 g/mol. 
     
     
         18 - 22 . (canceled) 
     
     
         23 . The masterbatch of  claim 14 , wherein the HALS is an oligomeric or polymeric HALS comprising one or more moieties of the formula (I), 
       
         
           
           
               
               
           
         
         wherein each R 1  independently represents C 1 -C 4  alkyl, R 2  represents H or C 1 -C 4  alkyl, and R 3  represents a further part of the oligomeric or polymeric HALS. 
       
     
     
         24 - 29 . (canceled) 
     
     
         30 . A kit-of-parts for use in preparing articles, preforms or containers comprising two masterbatches which may optionally be in admixture, wherein the second of the two masterbatches is the masterbatch of  claim 14 . 
     
     
         31 - 35 . (canceled)