Heterogeneous polymerizations in carbon dioxide

C - Chemistry – Metallurgy – 08 – F

Patent

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C08F 2/12 (2006.01) C08F 2/04 (2006.01) C08F 2/06 (2006.01) C08F 2/44 (2006.01) C08F 290/04 (2006.01) C08F 290/06 (2006.01) C08F 290/14 (2006.01)

Patent

CA 2233950

A method for the polymerization of a monomer is disclosed. The method includes (a) providing a reaction mixture comprising a monomer, a stabilizer precursor, and a polymerization initiator in a polymerization medium comprising carbon dioxide; and then (b) polymerizing the monomer and the stabilizer precursor in the polymerization medium to form a heterogeneous reaction mixture comprising a polymer in the polymerization medium. The stabilizer precursor is covalently bound to the polymer to provide an intrinsic surfactant in the polymer, which stabilizes the polymer in the heterogeneous reaction mixture.

L'invention porte sur un procédé de polymérisation d'un monomère consistant à: (a) constituer dans un milieu de polymérisation de CO¿2? un mélange réactif comprenant un monomère, un précurseur de stabilisateur et un initiateur de polymérisation; (b) à polymériser dans le milieu de polymérisation le monomère et le précurseur de stabilisateur de manière à y former un mélange réactif hétérogène incluant un polymère. Le précurseur de stabilisateur se trouvant lié par covalence au polymère y produit un tensioactif intrinsèque qui le stabilise dans le mélange réactif hétérogène.

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