Polymer mixture for producing films
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United States of America Patent
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-
May 24, 1994
Grant Date -
N/A
app pub date -
Feb 18, 1993
filing date -
May 18, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In order to produce a polymer mixture essentially consisting of starch and a polyolefin up to 70 wt. % of thermoplastically processable starch is mixed with 10 to 40 wt. % polyolefin and 10 to 35 wt. % ethylene/acrylate/maleic anhydride terpolymer. During this mixing process an esterification reaction takes place between the maleic anhydride groups in the terpolymer with free hydroxyl groups in the starch according to the general reaction process (I).
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