{
  "$type": "site.standard.document",
  "description": "A tread rubber composition and a tire that have excellent block chipping resistance and wear resistance are provided. The tread rubber composition contains a rubber component including an isoprene-based rubber, a butadiene rubber, and a styrene-butadiene rubber, and a carbon black having an average…",
  "path": "/patents/1391032",
  "publishedAt": "2025-12-10T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C1/0016",
    "SUMITOMO RUBBER IND [JP]"
  ],
  "textContent": "A tread rubber composition and a tire that have excellent block chipping resistance and wear resistance are provided. The tread rubber composition contains a rubber component including an isoprene-based rubber, a butadiene rubber, and a styrene-butadiene rubber, and a carbon black having an average particle diameter not greater than 20 nm and/or a cetyltrimethylammonium bromide adsorption specific surface area not less than 130 m2/g, an amount of the isoprene-based rubber in 100% by mass of the rubber component is not less than 56% by mass, and the rubber composition satisfies hardness (Hs) ≥ 72 and elongation at break (EB) ≥ 420%.",
  "title": "TREAD RUBBER COMPOSITION AND TIRE"
}