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AssigneePerstorp AB
InventorsHelen Magnusson, Eva Malmstrom, Anders Hult, Nicola Rehnberg
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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 Brønsted acid. The terminal groups in said hyperbranched dendritic polyether are substantially hydroxyl groups and used for said optional further processing.
A hyperbranched dendritic polyether, which optionally is further processed, wherein said hyperbranched dendritic polyether is obtained by a process comprising the step of thermally initiated cationic ring-opening polymerization of at least one oxetane having at least two reactive groups of which at least one is an oxetane group, said thermally initiated ring-opening polymerization being performed using an effective amount of at least one initiator and that terminal groups, prior to any optional further processing, in said hyperbranched dendritic polyether substantially are hydroxyl groups.
A process for manufacture of a hyperbranched dendritic polyether, which polyether optionally is subjected to further processing, wherein said process comprises the step of thermally initiated cationic ring-opened polymerization of at least one oxetane having at least two reactive groups of which at least one is an oxetane group, said thermally initiated ring-opening polymerization being performed using an effective amount of at least one initiator and said step yielding a hyperbranched dendritic polyether having terminal hydroxyl groups.
Dependencies are inferred from the claim text.