{
  "$type": "site.standard.document",
  "description": "The present disclosure aims to provide rubber compositions and tires which provide improved overall performance in terms of wet grip performance and dry grip performance. The present disclosure relates to a rubber composition having a hardness that reversibly changes with water and satisfying the…",
  "path": "/patents/1323422",
  "publishedAt": "2022-07-28T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "C08L9/06",
    "Sumitomo Rubber Industries, Ltd."
  ],
  "textContent": "The present disclosure aims to provide rubber compositions and tires which provide improved overall performance in terms of wet grip performance and dry grip performance. The present disclosure relates to a rubber composition having a hardness that reversibly changes with water and satisfying the following relationships (1) and (2): Hardness when dry−Hardness when water-wet≥1 (1) wherein each hardness represents the JIS-A hardness at 25° C. of the rubber composition; and tan δ at 70° C. when dry≥0.18 (2) wherein the tan δ at 70° C. represents the loss tangent measured at 70° C., an initial strain of 10%, a dynamic strain of 2%, and a frequency of 10 Hz.",
  "title": "RUBBER COMPOSITION AND TIRE"
}