Modified conjugated diene polymer, method for producing modified conjugated diene polymer, polymer composition, crosslinked polymer, and tire

{
  "publication_number": "US10280232B2",
  "country": "US",
  "kind": "B2",
  "title": "Modified conjugated diene polymer, method for producing modified conjugated diene polymer, polymer composition, crosslinked polymer, and tire",
  "abstract": "A modified conjugated diene-based polymer is produced by reacting a conjugated diene-based polymer having an alkali metal or an alkali-earth metal at a terminal of the polymer with a compound represented by formula (1). R 1 and R 2 independently represent a hydrocarbyl group having 20 or fewer carbon atoms. R 3 represents a substituted alkyl group having 20 or fewer carbon atoms prepared through substitution of at least one of a hydrogen atom and - CH 2 - of an alkyl group by a group containing only at least one heteroatom selected from the group consisting of nitrogen, phosphorus, oxygen, and sulfur, or a monovalent aromatic group having 20 or fewer carbon atoms and containing at least one element selected from the group consisting of nitrogen, phosphorus, oxygen, and sulfur, with the proviso that R 3 does not have active hydrogen. R 4 represents an alkanediyl group having 20 or fewer carbon atoms. n is 1 or 2.",
  "claims": [
    "1. A modified conjugated diene-based polymer produced by reacting a conjugated diene-based polymer having an alkali metal or an alkaline-earth metal at a terminal of the polymer with a compound represented by formula (1): wherein: R 1 and R 2 each independently represent a hydrocarbyl group having 20 or fewer carbon atoms; R 3 represents a substituted alkyl group having 20 or fewer carbon atoms, wherein a hydrogen atom and/or a - CH 2 - of an alkyl group are substituted by a group comprising at least one heteroatom selected from the group consisting of nitrogen, phosphorus, oxygen, and sulfur, or are substituted by a monovalent aromatic group having 20 or fewer carbon atoms and comprising at least one element selected from the group consisting of nitrogen, phosphorus, oxygen, and sulfur, with the proviso that R 3 does not have active hydrogen; R 4 represents an alkanediyl group having 20 or fewer carbon atoms; and n is 1 or 2.",
    "2. The modified conjugated diene-based polymer according to claim 1, wherein an amount of a structural unit derived from an aromatic vinyl compound is 0 to 50 mass % relative to a total amount of structural units of the conjugated diene-based polymer, and a vinyl bond content is 20 to 90 mol % relative to a total amount of structural units derived from a conjugated diene compound in the conjugated diene-based polymer.",
    "3. The modified conjugated diene-based polymer according to claim 1, wherein the conjugated diene-based polymer has a nitrogen-containing functional group at a polymerization initiation terminal.",
    "4. A method for producing a modified conjugated diene-based polymer, the method comprising reacting a conjugated diene-based polymer having an alkali metal or an alkaline-earth metal at a terminal of the polymer with a compound represented by formula (1): wherein: R 1 and R 2 each independently represent a hydrocarbyl group having 20 or fewer carbon atoms; R 3 represents a substituted alkyl group having 20 or fewer carbon atoms, wherein a hydrogen atom and/or a - CH 2 - of an alkyl group are substituted by a group comprising at least one heteroatom selected from the group consisting of nitrogen, phosphorus, oxygen, and sulfur, or are substituted by a monovalent aromatic group having 20 or fewer carbon atoms and comprising at least one element selected from the group consisting of nitrogen, phosphorus, oxygen, and sulfur, with the proviso that R 3 does not have active hydrogen; R 4 represents an alkanediyl group having 20 or fewer carbon atoms; and n is 1 or 2.",
    "5. A polymer composition comprising: the modified conjugated diene-based polymer according to claim 1, silica, and a crosslinking agent.",
    "6. A crosslinked polymer produced through crosslinking of the polymer composition according to claim 5.",
    "7. A tire, comprising the crosslinked polymer according to claim 6 as a tread material, a sidewall material, or both."
  ],
  "cpc": [
    "C08C 19/25",
    "B60C 1/00",
    "B60C 1/0016",
    "B60C 1/0025",
    "C08C 19/22",
    "C08F 236/06",
    "C08F 36/04",
    "C08F 8/32",
    "C08J 2315/00",
    "C08J 3/24",
    "C08K 3/36",
    "C08L 15/00",
    "C08L 9/06"
  ],
  "assignees": [
    "JSR CORP"
  ],
  "filing_date": "2016-01-29",
  "publication_date": "2019-05-07",
  "grant_date": "2019-05-07",
  "priority_date": "2015-03-10",
  "application_number": "US-201615556914-A",
  "family_id": "56880440",
  "citations": [
    "CN103848940A",
    "JP2006249069A",
    "JP2011162497A",
    "JP2013043977A",
    "JP2014528988A",
    "JP2015028170A",
    "JP4129619B2",
    "US2004254301A1",
    "US2012172528A1",
    "US2012296041A1",
    "US2013267646A1",
    "US2013296481A1",
    "US2015018488A1",
    "US2015148489A1",
    "US2018223008A1",
    "US2018251576A1",
    "US7342070B2",
    "US9951167B2",
    "WO2006076629A1"
  ]
}