C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 67/02 (2006.01)
Patent
CA 2235410
The present invention comprises polyester blend compositions having improved flavor retaining properties and color, comprising: (A) 98.0 to 99.95 weight percent of a polyester which comprises (1) a dicarboxylic acid component comprising repeat units from at least 85 mole percent terephthalic acid or naphthalenedicarboxylic acid derived from terephthalic acid or naphthalenedicarboxylic acid respectively; and (2) a diol component comprising repeat units from at least 85 mole percent ethylene glycol, based on 100 mole percent dicarboxylic acid and 100 mole percent diol; and (B) 2.0 to 0.05 weight percent of a polyamide; wherein the combined weights of (A) and (B) total 100 percent.
L'invention concerne des mélanges de polyesters améliorés en maittien de saveurs et en couleurs, dont la composition est la suivante: (A) entre 98 et 99,85 %, en poids, de polyesters comprenant (1) un constituant à base d'acide dicarboxylique ayant des motifs répétitifs d'au moins 85 %, en pourcentage molaire, d'acide théréphtalique ou d'acides naphtalènedicarboxylique provenant respectivement d'un acide thérephtalique ou d'un acide naphtalènedicarboxylique; et (2) un constituant diol ayant des motifs répétitifs d'au moins 85 %, en pourcentage molaire, d'éthylèneglycol, étant entendu que la base de pourcentage molaire est de 100 % pour l'acide dicarboxylique et de 100 % pour le diol; et (B) entre 2 et 0,05, en poids, de polyamides. Le pourcentage cumulé de (A) et de (B) équivaut à 100 %, en poids.
Long Timothy Edward
Sprayberry Harold Blake
Stafford Steven Lee
Turner Sam Richard
Eastman Chemical Company
Gowling Lafleur Henderson Llp
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