Thermoplastic elastomer composition
CA 1265883 C · Owner: Yoshida, Toshio · Inventors: Kanai, Tsuyoshi; Tanaka, Kikuo; Mikami, Takashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A thermoplastic elastomer composition and process comprising a crystalline polyolefin, halogenated butyl rubber, olefin copolymer rubber, polyolefin modified with e.g. maleic anhydride, and, optionally nitrile rubber wherein the halogenated butyl rubber is at least partially crosslinked using a metal oxide and/or chloride e.g. zinc, oxide. Crosslinking is achieved under dynamic mixing conditions and the resulting composition has superior strength, performance and processing properties. Furthermore, use of nitrile rubber imparts improved oil resistance to 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
- Granted February 13, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 13, 2007.
- 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.