Copolyoxamide oxygen barrier

Details Copolyoxamide oxygen barrier Copolyoxamide oxygen barrier

1992-01-16

1993-06-29

Anderson, Harold D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

4284744, 528324, 5283291, 528338, 528339, 528340, C08G 6926

Patent

active

052236030

ABSTRACT:
Oxygen barrier structures such as packages, laminated films, etc. are disclosed. The oxygen barrier has at least one layer comprising a polymer having oxamide units of the formula: ##STR1## and may further include amide units selected from the formulae: ##STR2## wherein R and R' are independently hydrocarbyl radicals of from 2 to 20 carbon atoms, and R" is a hydrocarbyl radical of from 1 to 18 carbon atoms. The polyoxamide or copoly(amide-oxamide) layer has an oxygen permeability which, at a high relative humidity, is less than or about the same as the oxygen permeability at a low relative humidity. Also disclosed is a method of protecting an article such as a foodstuff against oxidation by packaging the article with the oxygen barrier structure.

REFERENCES:
patent: 5093466 (1992-03-01), Patton et al.

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