Process for preparing polyolefins
CA 1078806 A · Owner: Nippon Oil Co. Ltd. · Inventors: Itoh, Akio; Shiraishi, Takeichi; Miyoshi, Mituji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Improved catalysts are provided for use in the polymerization or copolymerization of olefins. In addition a process, is provided for preparing polyolefins by polymerizing or copolymerizing olefins using such catalysts. The process for preparing polyolefins by polymerizing or copolymerizing olefins involves using, as a catalyst, a novel titanium-containing solid and an organoaluminum compound and/or an organozinc compound. The titanium-containing solid comprises a reaction product obtained by copulverizing (1) a magnesium halide and/or a manganese halide, (2) an aromatic hydrocarbon selected from the group consisting of polycyclic aromatic hydrocarbons homo-, cyclic hydrocarbons, and …
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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 June 3, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 3, 1997.
- 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.