Oxygen scavenging plastic material
AssigneeClariant Plastics & Coatings Ltd
InventorsMike Sahl, Martijn Gillissen, Maria Victoria Rodriguez
Life of this patent
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Abstract
The invention relates to a polyether-polyester copolymer comprising: (i) polyether segments wherein at least one polyether segment contains at least one polytetramethylene oxide segment, (ii) polyester segments, (iii) bridging elements of the structure —CO—R2-CO—, wherein R2 represents an optionally substituted bivalent hydrocarbon residue consisting of 1 to 100 carbon atoms; (iv) one or two end-caps R1-O—(C2-C4—O—)e—*, wherein R1 is an optionally substituted hydrocarbon residue and e is an integer of from 0 to 1000.
Claims20
A polyether-polyester copolymer comprising
- (i) polyether segments wherein at least one polyether segment contains at least one polytetramethylene oxide segment;
- (ii) polyester segments;
- (iii) bridging elements of the structure —CO—R2-CO—, wherein R2 is an optionally substituted bivalent hydrocarbon residue including 1 to 100 carbon atoms;
- and
- (iv) one or two end-caps R1-O—(C2-C4—O—)e—*, wherein R1 is an optionally substituted hydrocarbon residue, (C2-C4-O—) represents the same or different C2-C4-O repeating unit including 2 to 4 carbon atoms, and e is an integer of from 0 to 1000,
- wherein the mass ratio Θ defined as the mass ratio between the endcap content and the overall content of all dicarbonyl structure elements (ii) and (iii) is between 0.001 and 100.
A polyether-polyester copolymer comprising
- (i) polyether segments wherein at least one polyether segment contains at least one polytetramethylene oxide segment;
- (ii) polyester segments;
- (iii) bridging elements of the structure —CO-R2-CO—, wherein R2 is an optionally substituted bivalent hydrocarbon residue including 1 to 100 carbon atoms;
- and
- (iv) one or two end-caps R1-O—(C2-C4—O—)e—*, wherein (C2-C4—O—) represents the same or different C2-C4—O repeating unit including 2 to 4 carbon atoms, and e is an integer of from 0 to 1000, and R1 is methyl, ethyl, n-propyl, iso-propyl, n-butyl, iso-butyl, sec-butyl, tert-butyl, n-pentyl, iso-pentyl, sec-pentyl, neo-pentyl, 1,2-dimethylpropyl, iso-amyl, n-hexyl, sec-hexyl, n-heptyl, n-octyl, 2-ethyl-hexyl, n-nonyl, n-decyl, tridecyl, isotridecyl, tetradecyl, hexadecyl, octadecyl, methylphenyl cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, cyclononyl, or cyclodecyl.
Dependencies are inferred from the claim text.