{
  "$type": "site.standard.document",
  "coverImage": {
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  "description": "An object of the present invention is to provide: a rubber composition for a tire having a low viscosity and an excellent workability, and exhibiting an excellent wet performance and low rolling resistance, when formed into a tire; and a pneumatic tire using the rubber composition for a tire. The…",
  "path": "/patents/924464",
  "publishedAt": "2017-07-05T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C1/0016",
    "YOKOHAMA RUBBER CO LTD [JP]"
  ],
  "textContent": "An object of the present invention is to provide: a rubber composition for a tire having a low viscosity and an excellent workability, and exhibiting an excellent wet performance and low rolling resistance, when formed into a tire; and a pneumatic tire using the rubber composition for a tire. The rubber composition for a tire of the present invention contains diene-based rubber and silica. The diene-based rubber contains natural rubber and specific conjugated diene-based rubber. The content of the natural rubber in the diene-based rubber is 30 to 45 mass%. The content of the specific conjugated diene-based rubber in the diene-based rubber is 30 to 70 mass%. The specific conjugated diene-based rubber is conjugated diene-based rubber produced according to a specific production method. In the conjugated diene-based rubber, the aromatic vinyl unit content, the vinyl bond content, and the weight average molecular weight are within a predetermined range. The CTAB adsorption specific surface area of the silica is 180 m 2 /g or greater. The content of the silica is less than 60 parts by mass per 100 parts by mass of the diene-based rubber.",
  "title": "TIRE RUBBER COMPOSITION AND PNEUMATIC TIRE"
}