Block (co)polymer, block copolymer composition for asphalt modification, process for producing the same and asphalt composition
CA 2517142 C · Owner: Miyachi, Takumi · Inventors: Torii, Masatoshi; Kato, Hiroshi; Miyachi, Takumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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A composition for asphalt modification which comprises (a) a block (co)polymer represented by general formula (I); (S-B)m-S'n (in formula (I), S and S' are each a polymer block mainly composed of an aromatic vinyl compound B is a polymer , block mainly composed of a conjugated diene and m and n are , each an integer of 0 or 1 provided that m+n is 1 or more), wherein the total combined aromatic vinyl compound content in the block (co) polymer is from more than 10% by weight to 100% by weight and (b) a block copolymer represented by general formula (II) ; S-B-S, general formula (III); S-B-S' and/or general formula (IV); (S-B) 2-X (in formulas (II) to (IV) S, S' and B have the , same …
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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 19, 2004 and granted June 26, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 19, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 19, 2026.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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