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US 4,398,017 AGranted
Copolyesters
AssigneeOwens-Illinois, Inc.
InventorSantos W. Go
Life of this patent
Estimating the term…
Abstract
Copolyesters of iso- or terephthalic acid, ethylene glycol, 1,3 bis(2-hydroxyethoxy) benzene, and possibly other diols, have lower 0.sub.2 and CO.sub.2 permeabilities because of the 1,3 bis(2-hydroxyethoxy) benzene reactant. Also disclosed are hollow containers, sheet and film made from such copolyesters.
Claims7
A solid thermoplastic copolyester consisting essentially of the polymeric reaction product of
- (A) reactant(s) selected from isophthalic acid, terephthalic acid and their C.sub.1 to C.sub.4 alkyl esters, and any mixture thereof in any proportion,
- (B) reactants, 1,3 bis(2-hydroxyethoxy)benzene plus ethylene glycol, and optionally one or more other ester forming dihydroxy organic hydrocarbon reactant(s), and optionally,
- (C) reactant, bis(4-.beta.-hydroxyethoxyphenyl) sulfone, wherein
- (1) the amount of said 1,3 bis(2-hydroxyethoxy)benzene is 5-90 mol percent of the amount of A reactants,
- (2) the combined amount of B and C reactants is about 110 to 300 mol percent of the amount of A reactants,
- (3) the amount of said other ester forming dihydroxy organic hydrocarbon reactant(s) is zero to 20 mol percent of the amount of said A reactants, and
- (4) the combined amount of said (C) reactant plus said 1,3 bis(2-hydroxyethoxy)benzene and said other ester forming dihydroxy organic hydrocarbon reactant(s) is not over 90 mol percent of said A reactants.
4 more elements
Dependencies are inferred from the claim text.