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US 5,208,083 AGranted
Polymer blends with enhanced properties
AssigneeRohm and Haas Company
InventorWilliam T. Freed
Life of this patent
Estimating the term…
Abstract
Polymer blends of a) polymers containing predominantly mers of (meth)acrylates and/or glutarimides with b) up to about 40 weight percent of polymers having greater than about 50 mol % vinyl alcohol mers exhibit useful barrier properties to oxygen and other environmental gases, while maintaining or enhancing physical properties and clarity.
Claims5
A container having walls suitable for protecting the container contents from environmental gases, the walls being a gas-barrier polymer blend comprising
- a) from about 20 to about 95% by weight of a first polymer containing at least 50 mole percent mers of one or both of lower alkyl (meth)acrylates and glutarimides and forming a continuous phase, and
- b) from about 2.5% to about 40% by weight of a second polymer having at least 50 mole percent vinyl alcohol mers which is either miscible with, or forms a discontinuous phase in, the continuous phase, wherein the permeability to oxygen of the blend is 10% or less of the permeability of the first polymer alone.
Dependencies are inferred from the claim text.