Polymerization of olefins

C - Chemistry – Metallurgy – 08 – F

Patent

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C08F 10/00 (2006.01) C07F 7/00 (2006.01) C07F 7/28 (2006.01) C07F 15/00 (2006.01) C07F 15/04 (2006.01) C08F 4/605 (2006.01) C08F 4/64 (2006.01) C08F 4/70 (2006.01)

Patent

CA 2408663

Olefins are polymerized by novel transition metal complexes of selected iminocarboxylate and iminoamido ligands, sometimes in the presence of cocatalysts such as alkylaluminum compounds or neutral Lewis acids. Olefins which may be (co)polymerized include ethylene, a-olefins, and olefins containing polar groups such as olefinic esters for example acrylate esters. Also described are certain "Zwitterionic" transition metal complexes as polymerization catalysts for making polar copolymers. The resulting polymers are useful as thermoplastics and elastomers.

On effectue la polymérisation d'oléfines au moyen de nouveaux complexes de métaux de transition de ligands sélectionnés d'iminocarboxylate et d'iminoamido, quelquefois en présence de cocatalyseurs, tels que des composés d'alkylaluminium ou des acides de Lewis neutres. Les oléfines pouvant être co(polymérisées) comprennent éthylène, .alpha.-oléfine, ainsi que des oléfines contenant des groupes polaires, tels que des esters oléfiniques, par exemple des esters d'acrylate. L'invention concerne également certains complexes de métaux de transition "zwitterioniques" en tant que catalyseurs de polymérisation servant à préparer des copolymères polaires. Les polymères obtenus sont utiles en tant que thermoplastiques et élastomères.

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