Procatalyst composition for the polymerization of .alpha.-olefines, preparation and use
CA 2068652 A1 · Owner: Borealis Holding A/S · Inventors: Lommi, Marjaana; Iiskola, Eero; Ala-Huikku, Sirpa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a procatalyst composition for the polymerization of alfa-olefines, which has been prepared in steps, in which is arranged a carrier agent based on at least one inorganic oxide, having few or no hydroxyl groups on its surface and the carrier agent is reacted with the magnesium compound and one or more transition metal compounds of the groups IVB an VB of the periodic table. It has been observed that such a catalyst is most advantageous when a) this carrier agent is impregnated with a mixture of the Mg compound and one or more compounds of a transition metal of the groups IVb or Vb of the periodic table which , dissolves the Mg compound, and b) by …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed November 27, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 27, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 27, 2012.
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Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.