Star polymers having a well-defined siloxane core and...

Details Star polymers having a well-defined siloxane core and... Star polymers having a well-defined siloxane core and...

C - Chemistry, Metallurgy

08

G

C08G 77/442 (2006.01) C08G 81/02 (2006.01)

Patent

CA 2248958

The synthesis and characterization of novel multi-arm star polymers comprising polyisobutylene arms connected to a well-defined siloxane core are described. The synthesis has been achieved by hydrosilating olefin-capped (e.g., allyl- or isopropenyl-terminated) polyisobutylene with siloxanes carrying a plurality of Si-H groups.

L'invention concerne la synthèse et la caractérisation de nouveaux polymères en étoile à bras multiples, ayant des bras de polyisobutylène fixés à un noyau bien défini de siloxane. La synthèse a été obtenue par hydrosilation d'un polyisobutylène coiffé d'une oléfine (par exemple un groupe à terminaison allyle ou isopropényle) avec des siloxanes portant une pluralité de groupes Si-H.

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