Process for making melt stable ethylene vinyl alcohol polymer co

Details Process for making melt stable ethylene vinyl alcohol polymer co Process for making melt stable ethylene vinyl alcohol polymer co

1992-08-25

1993-11-09

Michl, Paul R.

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

Synthetic resins

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

525 57, 525 79, 524291, 524394, 524430, 524503, C08F21606, C08K 509, C08K 320, C08K 513

Patent

active

052603717

ABSTRACT:
The present invention relates generally to toughened ethylene vinyl alcohol ("EVOH") compositions having improved melt processing stability. More specifically, the EVOH compositions comprise anhydride-modified polyolefin toughening resin and a stabilizer system comprising a basic inorganic compound. In the preferred embodiment, the toughening resin and basic inorganic compound are melt blended in a first step and later melt blended with the EVOH composition in a second step.

REFERENCES:
patent: 4600746 (1986-07-01), Schmukler et al.
patent: 4877662 (1989-10-01), Yazaki et al.
patent: 5032632 (1991-07-01), Saxton
U.S. Pat. Appl'n. Ser. No. 07/523,544; filed May 15, 1990 (Saxton).

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