Grafted maleimide-styrene-g-polypropylene copolymers used in rubber compounds for increasing hysteresis
CA 2270376 A1 · Owner: Wang, Xiaorong · Inventors: Foltz, Victor J.; Wang, Xiaorong
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention teaches a method for enabling the formation of a high damping, compound. The method includes: reacting a poly(alkenyl benzene-co-maleimide) polymer with a, maleated polyalkylene and an alkyl diamine under substantially dry conditions sufficient to form a, polyalkylene grafted poly(alkenyl benzene-co-maleimide) polymer product; and dispersing the, polyalkylene grafted poly(alkenyl benzene-co-maleimide) polymer product within a rubber, formulation to form a relatively high damping compound. The present invention also, contemplates a rubber compound composition and an article manufactured from the composition.
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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 April 28, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 28, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 28, 2021.
- 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
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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.