Process for manufacture of a dendritic polyether
Pettersson, Bo ; James, David ; Midelf, Birger ; Björnberg, Håkan and Rehnberg, Nicola LU
(2002)
EP1355975
- Abstract
- A process for manufacture of a dendritic polyether comprising a core, derived from a compound having two or more hydroxyl groups, and at least one branching generation being built up from at least one hydroxyoxetane having one oxetane group and at least one hydroxyl group is disclosed. The process comprises ring opening addition to said core and ring opening polymerisation of said hydroxyoxetane. A mixture of the core compound and at least one cationic initiator is prepared and said hydroxyoxetane is fed to said mixture at a rate resulting in and/or maintaining a reaction temperature below onset at thermal degradation and in an amount resulting in at least one branching generation. The initiator is present in an amount of 0.1-0.5 % by... (More)
- A process for manufacture of a dendritic polyether comprising a core, derived from a compound having two or more hydroxyl groups, and at least one branching generation being built up from at least one hydroxyoxetane having one oxetane group and at least one hydroxyl group is disclosed. The process comprises ring opening addition to said core and ring opening polymerisation of said hydroxyoxetane. A mixture of the core compound and at least one cationic initiator is prepared and said hydroxyoxetane is fed to said mixture at a rate resulting in and/or maintaining a reaction temperature below onset at thermal degradation and in an amount resulting in at least one branching generation. The initiator is present in an amount of 0.1-0.5 % by weight calculated on said core and said oxetane, preferably in an amount giving a ratio hydroxyl groups to initiator of between 1:0.01 and 1:0.05. Yielded dendritic polyether is sebsequently neutralised by addition of at least one alkaline compound and optionally purified. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/953ebb67-fc5d-42f8-9469-8432a16074ec
- inventor
- Pettersson, Bo
; James, David
; Midelf, Birger
; Björnberg, Håkan
and Rehnberg, Nicola
LU
- publishing date
- 2002-05-23
- type
- Patent
- publication status
- published
- subject
- publisher
- World Intellectual Property Organization
- patent number
- EP1355975
- language
- English
- LU publication?
- no
- id
- 953ebb67-fc5d-42f8-9469-8432a16074ec
- date added to LUP
- 2021-11-25 16:32:50
- date last changed
- 2021-12-07 13:30:12
@misc{953ebb67-fc5d-42f8-9469-8432a16074ec,
abstract = {{A process for manufacture of a dendritic polyether comprising a core, derived from a compound having two or more hydroxyl groups, and at least one branching generation being built up from at least one hydroxyoxetane having one oxetane group and at least one hydroxyl group is disclosed. The process comprises ring opening addition to said core and ring opening polymerisation of said hydroxyoxetane. A mixture of the core compound and at least one cationic initiator is prepared and said hydroxyoxetane is fed to said mixture at a rate resulting in and/or maintaining a reaction temperature below onset at thermal degradation and in an amount resulting in at least one branching generation. The initiator is present in an amount of 0.1-0.5 % by weight calculated on said core and said oxetane, preferably in an amount giving a ratio hydroxyl groups to initiator of between 1:0.01 and 1:0.05. Yielded dendritic polyether is sebsequently neutralised by addition of at least one alkaline compound and optionally purified.}},
author = {{Pettersson, Bo and James, David and Midelf, Birger and Björnberg, Håkan and Rehnberg, Nicola}},
language = {{eng}},
month = {{05}},
note = {{Patent, Patent Number: EP1355975}},
publisher = {{World Intellectual Property Organization}},
title = {{Process for manufacture of a dendritic polyether}},
year = {{2002}},
}