Fina Research, S.a.

Olivier Miserque

Abbas Razavi

A metallocene compound having the general formula: CpAXMQ Q Cp&prime;A&prime;X&prime;M&prime;Q &prime;Q &prime; wherein Cp and Cp&prime; are each independently a substituted or unsubstituted cyclopentadienyl moiety; M and M&prime; are each independently a metal chosen from Group IV B transition metals and vanadium, and coordinate to Cp and Cp&prime; respectively; X and X&prime; are each independently a substituted or unsubstituted Group VA or VIA heteroatom and coordinate to M and M&Prime; respectively; A and A&prime; are bridging groups between Cp and X and between Cp&prime; and X&prime; respectively and are independently chosen from &mdash;SiR&prime; &mdash;O&mdash;SiR&prime; &mdash;, &mdash;Si R&prime; &mdash;, &mdash;C R&prime; &mdash; and &mdash;CR&prime; &mdash;SiR&prime; &mdash;CR&prime; &mdash;SiR&prime; &mdash;, in which each R&prime; is independently H or hydrocarbyl having 1 to 20 carbon atoms, n is an integer in the range 1 to 4 and m&equals;2 ; each Q , Q and Q &prime; and Q &prime; is independently a coordinating group which is hydrogen, halogen or hydrocarbyl having 1 to 20 carbon atoms and each of Q and Q &prime; is coordinated to both M and M&prime;.

Polyolefin production

A metallocene compound having the general formula: CpAXMQ Q Cp&prime;A&prime;X&prime;M&prime;Q &prime;Q &prime; wherein Cp and Cp&prime; are each independently a substituted or unsubstituted cyclopentadienyl moiety; M and M&prime; are each independently a metal chosen from Group IV B transition metals and vanadium, and coordinate to Cp and Cp&prime; respectively; X and X&prime; are each independently a substituted or unsubstituted Group VA or VIA heteroatom and coordinate to M and M&prime; respectively; A and A&prime; are bridging groups between Cp and X and between Cp&prime; and X&prime; respectively and are independently chosen from &mdash;SiR&prime; &mdash;O&mdash;SiR&prime; &mdash;, &mdash;Si R&prime; &mdash;, &mdash;C R&prime; &mdash; and &mdash;CR&prime; &mdash;SiR&prime; &mdash;CR&prime; &mdash;SiR&prime; &mdash;, in which each R&prime; is independently H or hydrocarbyl having 1 to 20 carbon atoms, n is an integer in the range 1 to 4 and m&equals;2n; each Q , Q and Q &prime; and Q &prime; is independently a coordinating group which is hydrogen, halogen or hydrocarbyl having 1 to 20 carbon atoms and each of Q and Q &prime; is coordinated to both M and M&prime;.

Growing community of inventors

Court-Saint-Etienne, Belgium

Olivier Miserque