Supported polymerisation catalysts

C - Chemistry – Metallurgy – 08 – F

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C08F 10/00 (2006.01) C08F 4/00 (2006.01) C08F 210/16 (2006.01) C08F 4/659 (2006.01) C08F 4/6592 (2006.01) C08F 110/02 (2006.01)

Patent

CA 2416536

Supported ionic metallocene catalyst systems may be prepared by a method comprising the following steps: i) mixing together in a suitable solvent : a) an organometallic compound, and b) an ionic activator comprising a cation and an anion; ii) addition of the mixture from step (i) to a support material; iii) addition of a metallocene complex in a suitable solvent; iv) further addition of an organometallic compound in a suitable solvent; and v) removal of the solvent. The preferred supported catalysts comprise a constrained geometry metallocene complex for example (t-butylamido) (tetramethyl-.fwdarw.5- cyclopentadienyl) dimethyl silanetitanium- .fwdarw.4-1.3-pentadiene and are particularly suitable for the polymerisation of ethylene or the copolymerisation of ethylene and .alpha.-olefins having from 3 to 10 carbons in the gas phase. The supported metallocene catalysts of the present invention show improved productivity compared to supported ionic metallocene catalyst systems of the prior art particularly when used in the gas phase.

L'invention concerne des systèmes catalyseurs ioniques métallocènes supportés susceptibles d'être élaborés selon un procédé comportant les étapes suivantes: i) mélange dans un solvant approprié a) d'un composé organométallique, et b) d'un activateur ionique comprenant un cation et un anion; ii) adjonction du mélange (i) à un matériau support; iii) adjonction d'un complexe métallocène dans un solvant approprié; iv) adjonction supplémentaire d'un composé organométallique dans un solvant approprié; et v) élimination du solvant. De préférence, les systèmes catalyseurs considérés comprennent un complexe métallocène à géométrie contrainte, par exemple (t-butylamido) (tétraméthyl .fwdarw.?5¿-cyclopentadiényl) diméthyl silanetitane- .fwdarw.?4¿-1.3-pentadiène. Ils sont particulièrement utiles pour la polymérisation de l'éthylène ou la copolymérisation de l'éthylène et d'alpha-oléfines ayant entre 3 et 10 atomes de carbone en phase gazeuse. Ces systèmes catalyseurs offrent un meilleur rendement par rapport aux systèmes catalyseurs ioniques métallocènes supportés existants, particulièrement en phase gazeuse.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Supported polymerisation catalysts does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Supported polymerisation catalysts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Supported polymerisation catalysts will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1409579

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.