Branched copolymers based on unsaturated nitriles and conjugated dienes
CA 2411680 C · Owner: Magg, Hans · Inventors: Marinelli, Luigi; Winkelbach, Hans-Rafael; Josten, Rolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to branched copolymers based on unsaturated nitriles , and conjugated dienes which are characterized in that the content of bonded unsaturated nitrile is 15 to 50 wt.%, the Mooney viscosity ranges from 15 to 150 MU , ML 1+ 4/100°C, the chain branching ranges from 0 to 20° (determined by the .DELTA..delta.B , value) and the solubility is >=85 wt.% (measured in methyl ethyl ketone at 20°C). The copolymers according to the invention can be used for the preparation of hydrogenated copolymers based on unsaturated nitriles and conjugated dienes (HNBRs) for the production of all kinds of mouldings by the injection moulding or , extrusion process and for …
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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.
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- Filed May 25, 2001 and granted July 26, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 25, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 25, 2023.
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