HYDROXY-FUNCTIONAL POLYESTERS AS THERMOPLASTIC BARRIER RESINS

摘要

Polyesters having improved barrier to oxygen are normally solid, thermoplastie methylol polyesters having baokbone repeating units containing pendant hydroxyl and methylol moieties and divalent organic moieties such as m-phenylene, p-phenylene, and isopropylidene diphenylene. Such polyesters are prepared by reacting diglycidyl esters of aromatic diacids such as diglycidyl terephthalate or diglycidyl ethers of dihydric phenols with diacids such as isophthalic acid.