{
  "$type": "site.standard.document",
  "description": "Provided are tread rubber compositions and pneumatic tires having excellent dry grip performance (grip performance on dry roads). Tread rubber compositions containing, per 100 parts by mass of the rubber component including at least one styrene-butadiene copolymer, 1 to 100 parts by mass of carbon…",
  "path": "/patents/1419927",
  "publishedAt": "2023-08-09T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C1/0016",
    "SUMITOMO RUBBER IND [JP]"
  ],
  "textContent": "Provided are tread rubber compositions and pneumatic tires having excellent dry grip performance (grip performance on dry roads). Tread rubber compositions containing, per 100 parts by mass of the rubber component including at least one styrene-butadiene copolymer, 1 to 100 parts by mass of carbon black and 0 to 150 parts by mass of silica, the tread rubber compositions satisfying the following relationships (1) and (2): 1.05≤H1b/H1a≤1.750.20≤H2b/H2a≤0.75 wherein H1a and H1b represent the peak areas of an extracted component obtained by acetone extraction of the compositions and an ozonolysis component obtained by ozonolysis of the extracted component, respectively, measured in a molecular weight range of at least 50 but less than 2500; and H2a and H2b represent the peak areas of the respective components in a molecular weight range of at least 2500 but not more than 30000.",
  "title": "TREAD RUBBER COMPOSITION AND PNEUMATIC TIRE"
}