Process for improving processability of ultra low melt viscosity

Details Process for improving processability of ultra low melt viscosity Process for improving processability of ultra low melt viscosity

1995-02-21

1997-01-14

Lipman, Bernard

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

Synthetic resins

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

5253338, C08F 800

Patent

active

055940749

ABSTRACT:
A process for making polymer pellets comprising unreacted free radical generator which can be degraded upon thermal treatment to form an ultra low melt viscosity polyolefin, which process comprises the steps of adding polyolefin and free radical generator required for the degradation in the extruder to the first half section of an extruder and injecting, optionally through a side-arm extruder, another portion of free radical generator near the exit of the extruder to provide a sufficient amount of unreacted free radical generator in the pellets produced, and followed by pelletizing the resulting molten mixture to form uniform non-sticky pellets.

REFERENCES:
patent: 4451589 (1984-05-01), Morman et al.
patent: 4514534 (1985-04-01), DiNardo
patent: 4578430 (1986-03-01), Davison
patent: 4861834 (1989-08-01), Audureau et al.
patent: 4897452 (1990-01-01), Berrier et al.
patent: 5264493 (1993-11-01), Palate et al.

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