(cycloakyl)methyl silanes as external donors for polyolefin catalysts
CA 2420143 A1 · Owner: Cheng, Chung-Ping · Inventors: Spencer, Michael Donald; Cheng, Chung-Ping
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
One aspect of the present invention relates to a catalyst system for use in olefinic polymerization, containg a solid titanium catalyst component; an organoaluminum compound having at least one aluminun-carbon bond; and an organosilicon compound comprising a (cycloalkyl)methyl group. Another aspect of the present invention relates to a method of making a catalyst for use in olefinic polymerization, involving the steps of reacting a Grignard reagent having a (cycloalkyl)methyl group with an orthosilicate to provide an organosilicon compound having a (cycloalkyl)methyl moiety; and combining the organosilicon compound with an organoaluminum compound having at least one aluminum-carbon …
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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 August 20, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 20, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 20, 2023.
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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.