Use of plasticisers for thermo-plasticizing starch
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United States of America Patent
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Jun 30, 1998
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N/A
app pub date -
Jan 3, 1997
filing date -
May 11, 1995
priority date (Note) -
Expired
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Abstract
The invention relates to the use of biodegradable graft copolymers producible in the presence of empirically determined quantities of water from polyvinyl alcohols with a degree of saponification of 88 to 99.5 mol. % by an acid catalysed acetalisation and/or transacetylisation reaction with carbohydrates containing carbonyl groups or presumptive carbonyl groups, in which the degree of acetqalisation, expressed in carbonyl equivalents per 100 vinyl alcohol equivalents, is between 0.2 and 20, and preferably between 1 and 10, as a plasticiser for the thermoplaticisation of starch and/or starch mixtures.
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