PROCESS FOR PRODUCING .alpha.-OLEFIN POLYMERS
CA 1164600 A · Owner: Chisso Corporation · Inventors: Uwai, Toshihiro; Kikuta, Kazutsune; Sato, Akihiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing .alpha.-olefin polymers having high crystallinity and good particle form with a high, yield is provided. The polymerization therefor is carried out in the presence of a preactivated catalyst suitable particularly to gas phase polymerization or gas phase polymerization following slurry or bulk polymerization. The catalyst is prepared by reacting a reduction solid prepared by reducing TiC?4 with an organoaluminum compound with an electron donor and an electron acceptor to obtain a solid product, and combining this solid product with an organoaluminum compound, an .alpha.-olefin and a reaction product of an organoaluminum compound with an electron donor.
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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 March 27, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 27, 2001.
- 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.