PROCESS FOR THE PREPARATION OF HYDROXYL-FUNCTIONALIZED POLYETHERPOLYSILOXANE BLOCK COPOLYMERS

PROCESS FOR THE PREPARATION OF HYDROXYL-FUNCTIONALIZED POLYETHERPOLYSILOXANE BLOCK COPOLYMERS

The present invention is directed to a hydroxyl-functionalized polyether-polysiloxane block copolymer of the structure A(-X-B)n wherein: A represents said polysiloxane block; B represents said polyether block; X is a linker group characterized by including the moiety Si-C-C- of which said Si is the...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: WOZNICKA, MARTA, KLEIN, JOHANN, GHOSH, SWARUP, MEJIA, ESTEBAN, MARQUARDT, MARION, DAMKE, JAN-ERIK, DESPOTOPOULOU, CHRISTINA, KRAGL, UDO
Format: Patent
Sprache:eng ; pol
Schlagworte:
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:The present invention is directed to a hydroxyl-functionalized polyether-polysiloxane block copolymer of the structure A(-X-B)n wherein: A represents said polysiloxane block; B represents said polyether block; X is a linker group characterized by including the moiety Si-C-C- of which said Si is the terminal silicon atom of the polysiloxane block A; and, n is an integer of from 2 to 4, said block copolymer being further characterized by a terminal unsaturation of less than 0.04 meq/g, preferably less than 0.03 meq/g and more preferably less than 0.025 meq/g and the method for producing thereof.