Polyolefin compositions having high rigidity and high impact resistance
CA 1295764 C · Owner: Kamiya, Takeshi · Inventors: Kamiya, Takeshi; Yamaoka, Noboru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is concerned with a polyolefin composition comprising:, (a) 10-96% by weight of a propylene polymer; (b) 2-30% by weight of an ethylene/.alpha.-olefin copolymer obtained by copolymerizing ethylene with an .alpha.-olefin having 3 to 12 carbon atoms in the presence of a catalyst consisting essentially of a solid material and on organoaluminum compound the solid, material containing magnesium and titanium and/or vanadium, and the ethylene/.alpha.-olefin copolymer having the following properties (i)-(iv):, (i) Melt index 0.01 - 100 g/10 min (ii) Density 0.860 - 0.910 g/cm3, (iii) Maximum peak temperature as measured according to not lower than a differential scanning 100°C, …
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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 11, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 11, 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.