A process for the preparation of vinylaromatic (co)polymers grafted on an elastomer in a controlled way
CA 2561908 C · Owner: Chiezzi, Leonardo · Inventors: Chiezzi, Leonardo; Longo, Aldo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the preparation of vinylaromatic (co)polymers grafted on an elastomer in a controlled way, comprising the dissolving of an elastomer such , as polibutadiene, in a mixture consisting of a monomer and of a solvent in the presence of a polymerization catalytic system which comprises an initiator of , free radicals and a stable initiator of free radicals. The mixture obtained in this way is heated to a temperature of about 100 ~C to functionalize the rubber, then more monomer is added and the temperature is raised to start the polymerization reaction.
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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
- Filed March 7, 2005 and granted December 18, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 7, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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Timeline
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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.