Titanium catalyst component for ethylene polymerization, ethylene polymerization catalyst, and process for ethylene polymerization using the same
CA 2107634 C · Owner: Kioka, Mamoru · Inventors: Yashiki, Tsuneo; Kioka, Mamoru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a titanium catalyst component for ethylene polymerization obtained by contacting A a solid magnesium aluminum complex containing magnesium halogen, aluminum and an alkoxy group and/or alcohol having at least 6 carbon atoms, with B a tetravalent titanium compound. The solid magnesium aluminum complex A is obtained by contacting (a-1) a magnesium solution formed from a halogen-containing magnesium compound, an alcohol having at least 6 carbon atoms and a hydrocarbon solvent with (a-2), an organoaluminum compound. Also disclosed is a process for ethylene polymerization comprising polymerizing ethylene or copolymerizing ethylene with an .alpha.-olefin having 3 to 20 carbon atoms in …
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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 October 4, 1993 and granted July 28, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 4, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 4, 2015.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.