Heterotelechelic block copolymers and process for producing the same
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United States of America Patent
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Jul 20, 1999
Grant Date -
N/A
app pub date -
Dec 18, 1997
filing date -
Apr 19, 1995
priority date (Note) -
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Abstract
This invention provides a heterotelechelic oligomer or polymer which is represented by formula below: ##STR1## wherein R.sup.1 and R.sup.2 form an acetal, or, combined with each other, denote oxy (.dbd.O), p, m, n and q each denote a certain integer, L is a group which forms an ester, and Z denotes a certain functional group. This invention a so provides a process to produce the above oligomer or polymer by means of living polymeri-zation. Since this oligomer or polymer forms a high- molecular micelle which is stable in an aqueous solvent, said oligomer or polymer will be useful as a carrier for drug delivery.
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