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US 5,275,853 AGranted
Hydroxyl functionalized polyetheramines as barrier packaging for oxygen-sensitive materials
AssigneeThe Dow Chemical Company
InventorsH. Craig Silvis, Jerry E. White
Life of this patent
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Abstract
Polyetheramines having improved barrier to oxygen are thermoplastic polymers having aromatic ether/amine repeating units in their backbones and pendant hydroxyl moieties. Such polyetheramines are prepared by reacting diglycidyl ethers of dihydric aromatic compounds such as the diglycidyl ether of bisphenol-A, hydroquinone, or resorcinol with amines having no more than two amine hydrogens per molecule, such as piperazine or ethanolamine.
Claims14
A moldable thermoplastic polyetheramine having repeating units represented by the formula:
- ##STR37## wherein each A is individually an amine or substituted amine moiety represented by the formula:
- ##STR38## in which R.sup.2 is C.sub.2 -C.sub.10 hydrocarbylene;
- R.sup.3 is a C.sub.2 -C.sub.10 alkylene or inertly substituted alkylene;
- R.sup.4 is a C.sub.2 -C.sub.20 hydrocarbylene or inertly substituted hydrocarbylene;
- Z is alkylamido, hydroxyl, alkoxy, alkylcarbonyl, aryloxy, arylcarbonyl, halo, or cyano;
- each B is individually a divalent aromatic moiety;
- each Y is individually divalent oxygen or sulfur;
- R.sup.1 is hydrogen or a monovalent hydrocarbon;
- each one of V and V' is independently a secondary amine or a tertiary amine;
- w is a whole number from 10 to 400;
- and x is a number sufficient to reduce the oxygen transmission rate of the polyetheramine to a value which is less than or equal to 5 cubic centimeters-mil/100 inch.sup.2 -atmosphere (O.sub.2)-day.
8 more elements
Dependencies are inferred from the claim text.