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US 5,089,588 AGranted
Hydroxy-functional poly(amide ethers) as thermoplastic barrier resins
AssigneeThe Dow Chemical Company
InventorsJerry E. White, David J. Brennan, Steven Pikulin
Life of this patent
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Abstract
Hydroxy-functional poly(amide-ethers) are fabricated into articles such as rigid containers and flexible films exhibiting high barrier to oxygen transmission in both dry and moist environments. For example, a polymer prepared by reacting the diglycidyl ether of 4,4'-biphenol with N,N'-bis(m-hydroxyphenyl)-adipamide exhibits especially high barrier.
Claims9
A thermoplastic polymer having excellent barrier to oxygen in both dry and moist environments and having repeating units represented by the formula:
- ##STR43## wherein each Ar.sup.1 is independently a divalent aromatic moiety, each R.sup.1 is a predominantly hydrocarbylene moiety, each R.sup.2 is independently hydrogen or a monovalent hydrocarbyl or substituted hydrocarbyl moiety, and each R.sup.3 is independently a predominantly hydrocarbylene moiety.
Dependencies are inferred from the claim text.