EP 4377376 A1 20240605 - METHOD FOR PREPARING A POLYSILOXANE-POLYCARBONATE BLOCK COPOLYMER USING AT LEAST ONE SPECIAL CONDENSATION REACTOR
Title (en)
METHOD FOR PREPARING A POLYSILOXANE-POLYCARBONATE BLOCK COPOLYMER USING AT LEAST ONE SPECIAL CONDENSATION REACTOR
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES POLYSILOXAN-POLYCARBONAT-BLOCKCOPOLYMERS UNTER VERWENDUNG MINDESTENS EINES SPEZIAL-KONDENSATIONSREAKTORS
Title (fr)
PROCÉDÉ DE PRÉPARATION D'UN COPOLYMÈRE À BLOCS DE POLYSILOXANE-POLYCARBONATE À L'AIDE D'AU MOINS UN RÉACTEUR DE CONDENSATION SPÉCIAL
Publication
Application
Priority
- EP 21187920 A 20210727
- EP 2022070219 W 20220719
Abstract (en)
[origin: WO2023006512A1] The present invention relates to a multi-stage method for continuously preparing a polysiloxane-polycarbonate block copolymer by means of polycondensation, the method being characterised in that, in a first stage, an oligocarbonate and a hydroxyaryl-terminated polysiloxane are provided and, in a second stage, at least one special condensation reactor is used; preferably, in a second stage, exactly one special condensation reactor is used or exactly two special condensation reactors are used. The method is also characterised in that a certain quantity of a certain co-catalyst is added and this co-catalyst is added before the first special condensation reactor. The polysiloxane-polycarbonate block copolymer prepared by the method according to the invention has a high proportion of small polysiloxane domains and is characterised by good mechanical properties, in particular by a tough fracture behaviour in the notch impact test according to ISO 7391 / ISO 180A, by good processability, for example in injection moulding or in extrusion, and by good flowability.
IPC 8 full level
C08G 64/18 (2006.01); C08G 64/20 (2006.01); C08G 77/448 (2006.01); C08G 81/00 (2006.01)
CPC (source: EP KR)
C08G 64/186 (2013.01 - EP KR); C08G 64/205 (2013.01 - EP KR); C08G 77/16 (2013.01 - EP KR); C08G 77/38 (2013.01 - EP); C08G 77/448 (2013.01 - EP KR); C08G 81/00 (2013.01 - EP KR); C08K 3/36 (2013.01 - EP)
C-Set (source: EP)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
WO 2023006512 A1 20230202; CN 117751154 A 20240322; EP 4377376 A1 20240605; JP 2024527002 A 20240719; KR 20240036575 A 20240320
DOCDB simple family (application)
EP 2022070219 W 20220719; CN 202280051353 A 20220719; EP 22753676 A 20220719; JP 2024504496 A 20220719; KR 20247002609 A 20220719