Diblock and triblock copolymers
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United States of America Patent
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Dec 29, 1987
Grant Date -
N/A
app pub date -
Sep 5, 1986
filing date -
Sep 5, 1986
priority date (Note) -
Expired
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Abstract
A diblock copolymer is disclosed having a first block of a polyalkylene oxide and a second block of glycolic acid ester and trimethylene carbonate linkages. A triblock copolymer is disclosed having a middle block obtained from an ethylene oxide homopolymer or a copolymer of ethylene oxide and a cyclic ether. Alternatively, the triblock copolymer middle block is obtained from a copolymer of formula (I): ##STR1## and formula (II): ##STR2## The copolymers are useful in medical and surgical applications.
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