Copolyester, polyester composition containing the copolyester, a

Details Copolyester, polyester composition containing the copolyester, a Copolyester, polyester composition containing the copolyester, a

1991-05-28

1992-05-19

Anderson, Harold D.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525437, 525448, 428480, C08G 6302, C08G 6318, C08G 63183

Patent

active

051150476

ABSTRACT:
A copolyester having an intrinsic viscosity, measured in o-chlorophenol at 25.degree. C., of 0.3 to 1.5 dl/g and being derived from dicarboxylic acid units composed of 95 to 60 mole % of isophthalic acid units and 5 to 40 mole % of 2,6-naphthalenedicarboxylic acid units and dihydroxy compound units composed of 95 to 70 mole % of ethylene glycol units and 5 to 30 mole % of 1,3-bis(2-hydroxyethoxy)benzene units; a gas barrier imparting agent composed of the copolyester; a polyester composition composed of (A) a polyethylene terephthlate and (B) the copolyester; and a film, a preform and a container composed of the polyester composition. Also provided are a polyester laminated structure, a stretched laminated structure, a preform and a laminated blow-molded article each composed of (C) a polyalkylene terephthalate layer and (D) a copolyester layer composed of the copolyester or the polyester composition.

REFERENCES:
patent: 3972852 (1976-08-01), Inata et al.
patent: 4060516 (1977-11-01), Kuratsuji et al.
patent: 4100142 (1978-07-01), Schaefer et al.
patent: 4390683 (1983-06-01), Yatsu et al.
patent: 4692506 (1987-09-01), Yatsu et al.
patent: 5039780 (1991-02-01), Hashimoto et al.

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