Patent · US Expired

Hyperbranched dendritic polyether and process for manufacture thereof

US6617418B1 · kind B1 · utility

19Cited by

1References

58Claims

0Family size

Assignee

PERSTORP AB · SE

Inventors

Helen Magnusson · Solna, SE
Eva Malmstrom · Sollentuna, SE
Anders Hult · Täby, SE
Nicola Rehnberg · Perstorp, SE

Key dates

Filing date	Jan 25, 2002
Grant date	Sep 9, 2003
Priority date	—
Expiry date	Jan 25, 2022

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G83/002
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

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 Brønsted acid. The terminal groups in said hyperbranched dendritic polyether are substantially hydroxyl groups and used for said optional further processing.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.