Thermoplastic copolyesters having improved gas barrier propertie

Details Thermoplastic copolyesters having improved gas barrier propertie Thermoplastic copolyesters having improved gas barrier propertie

1995-10-06

1996-09-03

Yoon, Tae

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

5283086, C08G 6300

Patent

active

055525121

ABSTRACT:
Disclosed are thermoplastic copolyesters having improved gas barrier properties and which can be produced having little or no acetaldehyde. These copolyesters are especially useful in the manufacture of food packaging products, foodtrays, film and beverage bottles which require good oxygen and carbon dioxide barrier properties. The copolyesters comprise repeat units from about 10 to 100 mole percent repeat units from naphthalene dicarboxylic acid, about 90 to 0 mole percent repeat units from terephthalic acid and repeat units from essentially 100 mole percent 1,4-cyclohexanedimethanol, wherein said 1,4-cyclohexanedimethanol has a cis isomer content of at least 50% said copolyester having an I.V. of about 0.4-1.2.

REFERENCES:
patent: 2901466 (1959-08-01), Kibler et al.
patent: 5254610 (1993-10-01), Small, Jr. et al.
patent: 5340624 (1994-08-01), Sublett
patent: 5352401 (1994-10-01), Dalgewicz, III. et al.

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