Patent ID: 7754798

Claim:
A film comprising at least one layer, the layer comprising an oxygen scavenger composition consisting essentially of a transition metal salt, compound or complex and a block copolymer, wherein said block copolymer comprises: (A) at least one first prepolymer (P A ) block segment composed of mer units derived from (a) at least one or a mixture of substituted alicyclic compounds having non-aromatic, ethylenic functionality according to the following representation: wherein A, B, C 1 , C 2 , C 3 , C 4 each independently represents hydrogen or a C q H 2q+1 hydrocarbyl group with q being an integer in the range of from 0 to 20, provided that either A or B and at least one of C 1 , C 2 , C 3 , C 4 are hydrogen atoms and each carbon atom of the alicyclic ring is fully substituted by groups selected from hydrogen, hydrocarbyl, X groups, Y groups and mixtures thereof; X and Y each independently or together represents functional groups capable of being part of a heteroatom containing linkage forming a covalent bond linkage between the cycloalkenyl containing group and other mer groups forming the first polymer block segment; and Z being selected from a —(C t H 2t )— hydrocarbylene group with t being an integer in the range from 1-4; and (b) at least one or a mixture of di- or polyfunctional hydrocarbon compounds according to the following representation: G-R′(-G) x wherein R′ represents a non-aromatic or aromatic hydrocarbon group; and each G independently represents a functional group capable of being part of a heteroatom containing linkage between the hydrocarbon group R′ and the other mer groups forming the first prepolymer block segment; and x is at least 1: and (B) at least one second prepolymer (P B ) block segment derived from a monofunctional or polyfunctional polymers represented by the formula P-(J) p wherein P represents a polymer capable of forming a film and being thermoplastic at temperatures higher than room temperature; and J represents functional group capable of being part of a heteroatom containing linkage forming a covalent bond linkage between the first prepolymer (P A ) and the second prepolymer (P B ) and p is 1 or 2; wherein at least one functional group of prepolymer (P A ) is capable of forming heteroatom containing linkage with functional group J of prepolymer (P B ), polymer block segment (P A ) is present in from 20 to 80 weight percent and polymer block segment (P B ) is present in from 80 to 20 weight percent of said block copolymer and said prepolymer (P A ) has a T g of lower than about minus 20° C. and said prepolymer (P B ) has a T m of higher than +30° C.