Five-component copolyester, process for preparation thereof, and

Details Five-component copolyester, process for preparation thereof, and Five-component copolyester, process for preparation thereof, and

1984-11-27

1986-11-11

Herbert, Thomas J.

Stock material or miscellaneous articles

Composite

Of polyester

528272, B32B 2708, B32B 2736

Patent

active

046222685

ABSTRACT:
A five-component copolyester not described in the prior art literature which comprises at least five components, i.e. (a) two aromatic dicarboxylic acid components composed of a major amount of an isophthalic acid component and a minor amount of another dicarboxylic acid component, (b) a diol component composed of an ethylene glycol component and optionally another diol component, (c) an aromatic monohydroxy-monocarboxylic acid component and (d) a polyfunctional compound component having at least three functional groups. The copolyester has excellent melt moldability, mechanical strength, transparency and gas-barrier property in a well balanced combination, and shows improved properties over conventional copolyesters containing a major amount of isophthalic acid as a dicarboxylic acid component.

REFERENCES:
patent: 4403090 (1983-09-01), Smith
Journal of Polymer Science, vol. XV, No. 80, 1955, pp. 591-592.

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