{
  "$type": "site.standard.document",
  "description": "Provide is a rubber composition for base tread which is excellent in rolling resistance properties and can improve pass-by noise when applying the rubber composition for base tread to a tire. Disclosed is a rubber composition for base tread used for a base tread of a tread portion of a tire, where…",
  "path": "/patents/1411006",
  "publishedAt": "2026-02-25T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C1/0016",
    "BRIDGESTONE CORP [JP]"
  ],
  "textContent": "Provide is a rubber composition for base tread which is excellent in rolling resistance properties and can improve pass-by noise when applying the rubber composition for base tread to a tire. Disclosed is a rubber composition for base tread used for a base tread of a tread portion of a tire, where a ratio of tanδ at 0 °C (0 °C tanδ) to tanδ at 30 °C (30 °C tanδ) (0 °C tanδ/30 °C tanδ) is 2.90 or more.",
  "title": "RUBBER COMPOSITION FOR BASE TREAD AND TIRE"
}