{
  "$type": "site.standard.document",
  "description": "A tire comprising a tread part, and at least one outermost surface member other than the tread part, wherein each of a rubber composition constituting the tread part and a rubber composition constituting the at least one outermost surface member other than the tread part comprises a rubber…",
  "path": "/patents/1403148",
  "publishedAt": "2024-10-16T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C1/0025",
    "SUMITOMO RUBBER IND [JP]"
  ],
  "textContent": "A tire comprising a tread part, and at least one outermost surface member other than the tread part, wherein each of a rubber composition constituting the tread part and a rubber composition constituting the at least one outermost surface member other than the tread part comprises a rubber component comprising a diene-based rubber and a multi-component polymer, the multi-component polymer comprising an aromatic vinyl unit, a nonconjugated olefin unit, and a conjugated diene unit, and wherein, when, for each of individual rubber components constituting the rubber component of the tread part, a value obtained by multiplying a mass fraction in the rubber component and the aromatic vinyl unit content (% by mass) is calculated and these values are summed to calculate an aromatic vinyl unit content T (% by mass) in the rubber component of the tread part, and, on the other hand, an aromatic vinyl unit content OMM (% by mass) in the rubber component of the at least one outermost surface member other than the tread part is similarly calculated, T is greater than OMM. The tire is a tire having an improved crack resistance.",
  "title": "TIRE"
}