{
  "$type": "site.standard.document",
  "description": "A rubber composition for a tread comprising: 10 to 30 parts by mass of carbon black A having an iodine adsorption amount of 130 mg/g or more and 20 to 50 parts by mass of carbon black B having an iodine adsorption amount of 110 mg/g or more and less than 130 mg/g based on 100 parts by mass of a…",
  "path": "/patents/1303134",
  "publishedAt": "2021-10-28T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "C08L7/00",
    "Sumitomo Rubber Industries, Ltd."
  ],
  "textContent": "A rubber composition for a tread comprising: 10 to 30 parts by mass of carbon black A having an iodine adsorption amount of 130 mg/g or more and 20 to 50 parts by mass of carbon black B having an iodine adsorption amount of 110 mg/g or more and less than 130 mg/g based on 100 parts by mass of a rubber component comprising 25 to 45% by mass of a styrene-butadiene rubber having a styrene content of 15% by mass or less and a vinyl content of from 30 to 50 mol %, 45 to 65% by mass of an isoprene-based rubber and 5 to 15% by mass of a butadiene rubber, wherein assuming that a content of the carbon black A is X part by mass, a content of the carbon black B is 0.6X to 4.5X part by mass.",
  "title": "RUBBER COMPOSITION FOR TREAD AND TIRE"
}