Method for manufacturing shaped articles from multi-block copolymers of acrylonitrile
CA 1055210 A · Owner: Ceskoslovenska Akademie Ved · Inventors: Stoy, Artur; Zima, Jiri; Stoy, Vladimir
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method of manufacturing shaped articles from multiblock copolymers of acrylonitrile with acrylamide and/or acrylic acid and diacryl imide, which copolymers have a structure displaying typical, circular reflexes as a 5.1 ? periodicity in x-ray analysis and presenting two distinct but inseparable phasein the swelled state. This method comprises molding the copolymers in the state of hydrogels by pressure in the presence of a water containing swelling agent at temperature higher than the glass transition point of any polymeric phase present in the system, but lower then 250°C while avoiding the boiling of said swelling agent, to shape the articles with unchanged equilibrium swelling capacity …
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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 May 29, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 29, 1996.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.