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US 6,294,609 B1Granted
Composition based on an ethylene-vinyl alcohol copolymer and its use
AssigneeAtofina
InventorsDenis Bertin, Denis Germain
Life of this patent
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Abstract
Particularly useful as a barrier layer in packaging, e.g. multilayer structures, is a composition based on an ethylene-vinyl alcohol copolymer comprising: 50 to 98% by weight of an EVOH copolymer 1 to 50% by weight of a polyethylene (A) 1 to 15% by weight of a polyethylene (B) being a blend of a polyethylene (B1) and a polyethylene (B2) chosen from elastomers, very-low-density polyethylenes and metallocene polyethylenes, the blend of (B1) and (B2) being cografted by an unsaturated carboxylic acid or a functional acid derivative thereof.
Claims8
A composition based on an ethylene-vinyl alcohol (EVOH) copolymer comprising:
- 50 to 98% by weight of an EVOH copolymer
- 1 to 50% by weight of a polyethylene (A)
- 1 to 15% by weight of an acid grafted blend (B) of a polyethylene (B1) and a polyethylene (B2) chosen from elastomers, very-low-density polyethylenes and metallocene polyethylenes, the blend of (B1) and (B2) being cografted by an unsaturated carboxylic acid or a functional acid derivative thereof, (B1) and (B2) being different polyethylenes.
Dependencies are inferred from the claim text.