Process for preparing a ziegler type catalytic system and process for preparing ultra high molecular weight polyethylene
CA 1313435 C · Owner: Petrobras And Polialden Petroquimica S.A. · Inventors: Do Coutto Filho, Odyr; Barcala Haag, Roberto; Quijada Abarca, Juan Raul
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Invention Patent: "A PROCESS FOR PREPARING A ZIE GLER TYPE CATALYTIC SYSTEM AND A PROCESS FOR PREPARING ULTRA HIGH MOLECULAR WEIGHT POLYETHYLENE."------------ --------Description of the preparation of a Ziegler type catalyst system through impregnation of a special alumina with 0.8-1.0% by weight of titanium derived -from a dilute solution of titanium halide in n-hexane activator employed being triisobutylaluminum or triethylaluminum at an (Al)/(Ti) molar ratio of 2.5/1 to - 80/1 in the catalyst. The catalyst system has high efficiency and yield, and leads to polyethylenes of excellent physical and mechanical properties which make it particularly suitable for use in engineering plastics
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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 February 2, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 2, 2010.
- 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.