Process for producing styrene-based polymers and apparatus for producing said polymers
CA 1329301 C · Owner: Idemitsu Petrochemical Company Limited · Inventors: Shirota, Daigo; Izumi, Takashi; Ishikawa, Kazutoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing styrene-based polymers which, comprises polymerization styrene or styrene derivatives at a temperature of not higher than 110°C while applying sufficient shearing force to maintain a polydispersive state so as to make, a substantially solid-state polydispersoid of the product and reaction apparatus suitable for performing said process. According to the process and apparatus when polymerizing styrene, or styrene derivatives styrene-based polymers having mainly, syndiotactic configuration with uniform particle size can be obtained efficiently without adhesion of scale to the reaction tank or agitating blades, and moreover it is possible to control, the particle size of …
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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 3, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 3, 2011.
- 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.