Poly(alkenyl substituted aromatic) and elastomer containing polymer compositions and process for their preparation
CA 2019433 A1 · Owner: Zijderveld, Johannes M. · Inventors: Zijderveld, Johannes M.; Nelissen, Laurentius N. I. H.; De Koning, Gerardus J. M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Poly(alkenyl substituted aromatic) and elastomer containing polymer compositions, obtainable by a process comprising:, (a) conversion of polyphenylene ether or a structurally related polymer thereof with an acid halide an acid anhydride or ketene, in at least one alkenyl substituted aromatic monomer;, (b) dissolution of at least one EPDM rubber and an optionally partially hydrogenated diblock copolymer A-B, optionally mixed with minor amounts of triblock copolymers ABA, wherein A represents a poly(alkenyl aromatic) block and B represents an optionally, partially hydrogenated poly conjugated diene block:, (c) prepolymerization of the obtained mixture until a polymerization degree of from 5 …
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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 June 20, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 20, 2012.
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