Oxygen scavenging compositions requiring no induction period

Abstract

A multilayer plastic bottle comprising at least one layer comprising a composition, said composition comprising: polyethylene terephthalate that is substantially free of antimony; an oxidizable polyether-based additive; and a transition metal catalyst, wherein the bottle has an oxygen permeability of not more than about 3.0 cm3 mm/(m2 atm day) immediately after the bottle is formed.

1 . A composition comprising:
 polyethylene terephthalate that is substantially free of antimony;   an oxidizable polyether-based additive; and   a transition metal catalyst.   
     
     
         2 . The composition of  claim 1 , wherein the polyethylene terephthalate contains less than 100 ppm of antimony. 
     
     
         3 . The composition of  claim 1 , wherein the polyethylene terephthalate contains less than 50 ppm of antimony. 
     
     
         4 . The composition of  claim 1 , wherein the polyethylene terephthalate contains less than 10 ppm of antimony. 
     
     
         5 . The composition of  claim 1 , wherein the polyethylene terephthalate contains between about 0 ppm and about 2 ppm of antimony. 
     
     
         6 . The composition of  claim 1 , wherein the oxidizable polyether-based additive has the formula X—[R—O] n —R′—Y, wherein
 R is a substituted or unsubstituted alkylene chain having from 2 to 10 carbon atoms; 
 n ranges from 4 to 100; 
 X and Y are selected from the group consisting of H, OH, —OCOR 1 , —OCOAr 1 , —OR 1 , and —OAr 1 , wherein R 1  is an alkyl group having from 2 to 18 carbon atoms and Ar 1  is an aryl group; and 
 R′ may be the same as R or selected from the group consisting of —[COR 2 COOR 3 O] p — and —[COAr 2 COOR 3 O] p — wherein Ar 2  is a phenylene or naphthylene group, R 2  and R 3  are C 2  to C 18  alkylene groups, and p ranges from 10 to 100. 
 
     
     
         7 . The composition of  claim 1 , wherein the oxidizable polyether-based additive is selected from the group consisting of polyether diols, ester capped derivatives of polyether diols, polyether-polyester block copolymers, and ether end-capped ether end-capped derivatives of polyether diols. 
     
     
         8 . The composition of  claim 7 , wherein the oxidizable polyether-based additive comprises polytetramethylene ether glycol. 
     
     
         9 . The composition of  claim 7 , wherein the oxidizable polyether-based additive comprises PTMEG-b-PET copolymer. 
     
     
         10 . The composition of  claim 7 , wherein the oxidizable polyether-based additive comprises polytetramethylene ether glycol dimethyl ether. 
     
     
         11 . The composition of  claim 1 , wherein the transition metal catalyst comprises cobalt. 
     
     
         12 . The composition of  claim 1 , wherein the transition metal catalyst comprises a carboxylate salt. 
     
     
         13 . The composition of  claim 1 , wherein the transition metal catalyst comprises cobalt neodecanoate. 
     
     
         14 . A multilayer plastic bottle comprising at least one layer comprising a composition, said composition comprising:
 polyethylene terephthalate that is substantially free of antimony;   an oxidizable polyether-based additive; and   a transition metal catalyst,   wherein the bottle has an oxygen permeability of not more than about 3.0 cm 3  mm/(m 2  atm day) immediately after the bottle is formed.   
     
     
         15 . The bottle of  claim 14 , wherein the polyethylene terephthalate contains less than 50 ppm of antimony. 
     
     
         16 . The bottle of  claim 15 , wherein the polyethylene terephthalate contains less than 10 ppm of antimony. 
     
     
         17 . The bottle of  claim 16 , wherein the polyethylene terephthalate contains between about 0 ppm and about 2 ppm of antimony. 
     
     
         18 . The bottle of  claim 14 , wherein the oxidizable polyether-based additive has the formula X—[R—O] n —R′—Y, wherein
 R is a substituted or unsubstituted alkylene chain having from 2 to 10 carbon atoms; 
 n ranges from 4 to 100; 
 X and Y are selected from the group consisting of H, OH, —OCOR 1 , —OCOAr 1 , —OR 1 , and —OAr 1 , wherein R 1  is an alkyl group having from 2 to 18 carbon atoms and Ar 1  is an aryl group; and 
 R′ may be the same as R or selected from the group consisting of —[COR 2 COOR 3 O] p — and —[COAr 2 COOR 3 O] p — wherein Ar 2  is a phenylene or naphthylene group, R 2  and R 3  are C 2  to C 18  alkylene groups, and p ranges from 10 to 100. 
 
     
     
         19 . The bottle of  claim 14 , wherein the oxidizable polyether-based additive is selected from the group consisting of polyether diols, ester capped derivatives of polyether diols, polyether-polyester block copolymers, and ether end-capped derivatives of polyether diols. 
     
     
         20 . The bottle of  claim 14 , wherein the oxidizable polyether-based additive comprises polytetramethylene ether glycol. 
     
     
         21 . The bottle of  claim 14 , wherein the oxidizable polyether-based additive comprises PTMEG-b-PET copolymer. 
     
     
         22 . The bottle of  claim 14 , wherein the oxidizable polyether-based additive comprises polytetramethylene ether glycol dimethyl ether. 
     
     
         23 . The bottle of  claim 14 , wherein the composition comprises up to about 0.5 wt. % of the oxidizable polyether-based additive. 
     
     
         24 . The bottle of  claim 14 , wherein the composition comprises about 1 wt. % to about 5 wt. % of the oxidizable polyether-based additive. 
     
     
         25 . The bottle of  claim 14 , wherein the transition metal catalyst comprises cobalt. 
     
     
         26 . The bottle of  claim 14 , wherein the transition metal catalyst comprises a carboxylate salt. 
     
     
         27 . The bottle of  claim 14 , wherein the transition metal catalyst comprises cobalt neodecanoate. 
     
     
         28 . The composition of  claim 1 , wherein the polyethylene terephthalate contains less than about 10 ppm of phosphorous. 
     
     
         29 . The bottle of  claim 14 , wherein the polyethylene terephthalate contains less than about 10 ppm of phosphorous.