Ethylene polymers
CA 1075400 A · Owner: Imperial Chemical Industries Limited · Inventors: Jones, Eric; Ballard, Denis G.H.; Padget, John C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A copolymer of ethylene with at least one mono-.alpha.-olefine having at least 5 carbon atoms, the copolymer having a density in the range 918 to 940 kg/m3 an apparent, viscosity (A) at 200°C and a shear rate of 100 sec-1 of 0.5 x 103 to 3.0 x 103 Nam-2 and a viscosity at 200°C and a stress of 103N/m2 of 2Ae (1.6A x 103) to 10000A. Hexene-1 is the preferred comonomer and is present in the copolymer in an amount of 6.5 to 16.5% by weight. The polymers are readily processed and can be formed into films which combine good stiffness and good impact properties. The polymers are conveniently prepared using supported transition metal benzyl compounds followed by a total work-up of the …
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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 April 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 8, 1997.
- 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.