Higher heat degradable polymer alloys
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United States of America Patent
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Apr 5, 1994
Grant Date -
N/A
app pub date -
Oct 3, 1991
filing date -
Oct 3, 1991
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Expired
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Abstract
The thermal properties, such as heat distortion temperature of biodegradable polymers, such as polylactic acid, polyglycolides, polybutyric acid and copolymers of butyric and valeric acid, may be increased by blending them with a polymer having Tg from 75.degree. C. to 200.degree. C. and a Hildebrand parameter (.sigma.) of not more than 3 MPA.sup.1/2 different from the biopolymer.
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