Nitrile-pvc blends
CA 1053826 A · Owner: Polysar Limited · Inventors: Dunn, John R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Blends of polyvinyl chloride and modified nitrile rubber are provided which have superior physical properties to similar blends of polyvinyl chloried and normal nitrile rubber. The modified nitrile rubber contain small amounts of tertiary amine groups, which may be incorporated by copolymerizing with the conjugated diolefin and unsaturated nitrile monomer a tertiary amine group containing monomer such as dimethylaminoethyl methacrylate. The blends can range from rigid or flexible uncured blends, of good impact strength to rubber compositions, of improved green strength vulcanizable to yield vulcanizates, of enhanced physical and abrasion properties. The rigid blends may be used in …
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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 1, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 1, 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.
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.