Process for the direct synthesis of highly amorphous propylene homopolymers and propylene-ethylene copolymers
CA 1296484 C · Owner: Pearson, Neal · Inventors: Holliday, Robert Emmett; Pearson, Neal; Smith, Thomas William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a process for the production of highly amorphous propylene homopolymers or propylene-ethylene copolymers which comprises polymerizing propylene or a mixture of propylene and ethylene at a temperature of 130°C-190°C and a pressure of about 300-5000 psig (21.1-352 kg) in the presence of a catalyst system which comprises (a) titanium halide on a support comprising magnesium chloride and (b) an aluminum alkyl.
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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 25, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 25, 2009.
- 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.