Process for preparing polyolefins
CA 1237247 A · Owner: Nippon Oil Co. Ltd. · Inventors: Okamoto, Mitsuo; Matsuura, Kazuo; Kamiishi, Hirofumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Provided is a process for preparing a polyolefin by polymerizing at least one olefin in the presence of a catalyst comprising a solid catalyst component and an organometallic compound, said solid catalyst component being a product obtained by intercontacting the following components (i)-(iv):, (i) a silicon oxide and/or an aluminum oxide (ii) a reaction product obtained by the reaction of a magnesium halide and a compound represented by the general formula Me(OR)nXz-n wherein Me is an element of Groups I-IV in the Periodic Table, z is the valence of the element Me, n is 0 < n ? z, X is a halogen atom and R is a hydrocarbon radical having 1 to 20 carbon atoms, (iii) a halogenated silicon …
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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
- Granted May 24, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 24, 2005.
- 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.