Hyperbranched dendritic polyether and process for manufacture thereof
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United States of America Patent
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Sep 9, 2003
Grant Date -
N/A
app pub date -
Jan 25, 2002
filing date -
Mar 23, 1999
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Abstract
A hyperbranched dendritic polyether, which optionally is further processed, such as further chain extended, chain terminated and/or functionalised. The hyperbranched dendritic polyether is obtained in a process comprising the step of thermally initiated cationic ring-opening polymerisation of at least one oxetane having at least two reactive groups of which at least one is an oxetane group. The thermally initiated ring-opening polymerisation is performed using an effective amount of at least one initiator, such as a thermal onium salt, a Lewis acid and/or a Br.o slashed.nsted acid. The terminal groups in said hyperbranched dendritic polyether are substantially hydroxyl groups and used for said optional further processing.
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