High melt strength, ethylene polymer, process for making it, and

Details High melt strength, ethylene polymer, process for making it, and High melt strength, ethylene polymer, process for making it, and

1994-08-19

1996-04-16

Chapman, Mark

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

Synthetic resins

Compositions to be polymerized by wave energy wherein said...

526352, 5263522, C08J 328, C08F11002

Patent

active

055083196

ABSTRACT:
Disclosed is a normally solid, high molecular weight, gel-free, irradiated ethylene polymer having a density of from 0.89 to 0.97 g/cc characterized by high melt strength due to strain hardening which is believed to be caused by free-end long chain branches of the molecular chains forming the polymer.
Also disclosed is a process for making the polymer by high energy radiation of a normally solid, high molecular weight, ethylene polymer in a reduced active oxygen environment, maintaining the irradiated material in such environment for a specific period of time, and then deactivating free radicals in the material.

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patent: 4916198 (1990-04-01), Scheve
patent: 5047446 (1991-09-01), DeNicola
patent: 5047485 (1991-09-01), DeNicola

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