C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 77/08 (2006.01) C07F 7/21 (2006.01) C08G 77/06 (2006.01) C08G 77/14 (2006.01) C08G 77/20 (2006.01) C08G 77/24 (2006.01)
Patent
CA 2386324
This invention relates to methods for the preparation of hyperbranched siloxane polymers by anionic polymerization of a cyclotrisiloxane having the functional group Si-OH, and for the preparation of linear siloxane polymers by cationic or anionic polymerization of a cyclotrisiloxane having a vinylterminated functional group. Furthermore, this invention concerns novel cyclotrisiloxanes useful for the preparation of the aforementioned polymers.
La présente invention concerne un procédé d'élaboration de polymères de siloxane hyper-ramifiés par polymérisation anionique d'un cyclotrisiloxane portant un groupe fonctionnel Si-OH. L'invention concerne également un procédé d'élaboration de polymères de siloxane linéaires par polymérisation cationique ou anionique d'un cyclotrisiloxane portant un groupe fonctionnel à terminaison vinyle. L'invention concerne enfin de nouveaux cyclotrisiloxanes convenant à l'élaboration des polymères précédents.
Paulasaari Jyri Kalevi
Weber William P.
Robic
University Of Southern California
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