Binary and ternary blends comprising monovinylarene/conjugated diene block copolymers and monovinylarene/alkyl (meth)acrylate copolymers
CA 2556017 C · Owner: Brown, John M. · Inventors: Chaffin, Jay M.; Rhodes, Vergil H.; Brown, John M.
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We disclose compositions, comprising (i) from about 25 parts by weight to about , 95 parts by weight of a monovinylarene-conjugated diene coupled block copolymer , comprising at least one tapered block having a blocky monovinylarene content of less , than 90 wt% of total monovinylarene units and comprising a terminal , monovinylarene block having a molecular weight of less than 60,000 g/mol; and (ii) from about 5 parts by , weight to about 75 parts by weight of a monovinylarene-alkyl (meth)acrylate copolymer, comprising (ii-a) monovinylarene units and (ii-b) either alkyl acrylate units alkyl , methacrylate units, or both. The compositions can be used in shrink film or rigid , …
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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 February 18, 2005 and granted January 29, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 18, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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