4-valerolactone copolymers
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United States of America Patent
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Jul 21, 1992
Grant Date -
N/A
app pub date -
Apr 2, 1991
filing date -
Apr 2, 1991
priority date (Note) -
Expired
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Abstract
Copolymers of lactic acid, from 0.5 to 20 weight % of 4-valerolactone and from 0 to 20 weight % of a C.sub.6-8 lactone form polymers having a higher intrinsic viscosity than homopolymers of lactic acid per se. The polymers also have an increased heat stability over the homopolymer of lactic acid.
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