Extrusion grade polyethylene iso/terephthalate copolymer

Details Extrusion grade polyethylene iso/terephthalate copolymer Extrusion grade polyethylene iso/terephthalate copolymer

1979-04-23

1980-11-18

Phynes, Lucille M.

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

Synthetic resins

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

260 4585R, 260 4595R, 528309, 264319, C08G 6346, C08G 6376

Patent

active

042347084

ABSTRACT:
A process is disclosed for producing a modified polyethylene iso-terephthalate copolymer which may be processed into plastic containers using conventional extrusion blow molding equipment. The copolymer is modified by the incorporation into a polyethylene iso/terephthalate prepolymer of a chain branching agent and a chain terminating agent. The prepolymer is subsequently solid-state polymerized to form a polyethylene iso/terephthalate copolymer having high zero shear rate melt viscosity and shear sensitivity. This modified copolymer is transparent when extrusion blow molded into a shaped article. The modified copolymer may be extrusion blow molded in intermittent and continuous processes.

REFERENCES:
patent: 2951827 (1960-09-01), Siggel
patent: 3033824 (1962-05-01), Huffman
patent: 3673139 (1972-06-01), Hrach
patent: 3692744 (1972-09-01), Rich
patent: 4093603 (1978-06-01), Jackson et al.
patent: 4161579 (1979-07-01), Edelman et al.

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