Hydroxy-functional polyesters as thermoplastic barrier resins

Details Hydroxy-functional polyesters as thermoplastic barrier resins Hydroxy-functional polyesters as thermoplastic barrier resins

C - Chemistry, Metallurgy

08

G

C08G 63/00 (2006.01) C08G 59/42 (2006.01) C08G 63/12 (2006.01) C08G 63/42 (2006.01) C08G 63/668 (2006.01)

Patent

CA 2068497

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.

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