Preparation of olefin polymerization catalyst component
CA 1311741 C · Owner: Nestlerode, Steven M. · Inventors: Job, Robert C.; Nestlerode, Steven M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Solid catalyst components for use in the polymerization of olefins and having improved activity and selectivity are prepared by:, a) halogenating a magnesium compound containing at least one aryloxy, alkyl carbonate or alkyloxy group with a first halide of tetravalent titanium and a first electron donor;, b1) contacting the resulting halogenated product with a second halide of tetravalent titanium; and c) washing a resulting treated halogenated product with an inert hydrocarbon liquid wherein a second, electron donor is used in step a) or step b1) and in that the product of step b1) is contacted in step b2 with a third halide of tetravalent titanium at a temperature of 40° to 140°C and …
Read the whole patent
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
- Granted December 22, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 22, 2009.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
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.