| 摘要 |
The present invention relates to a linear block polymer having a molecular weight of at least 10<4> Dalton, which linear block polymer is comprised of internally linearly connected sequences, which sequences may be described according to formula (1), wherein 1 to 100 % of R1, which 1 to 100 % of R1 may be the same or different, comprise a functional group Z and each Z, which Z may be the same or different, is a protected or unprotected functional group such as hydroxyl, amino, carboxyl, thiol, cyano, or nitro group; and, each R2, which R2 may be same or different, may be derived from a diisocyanate and comprises no, one or more ester groups; each R3, which R3 may be same or different, comprises no, one or more ester groups and may be derived from one or more of polyesterdiol, polyetherdiol or monodiol; method for preparation and fractional precipitation, implants, material for promotion of wound healing, pharmaceutical compositions, microencapsules, suspensions and emulsions.
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