{
  "$type": "site.standard.document",
  "description": "The present invention provides a rubber composition that improves processability and fuel efficiency without decreasing mechanical strength and abrasion resistance, which are excellent properties of natural rubber, and a pneumatic tire using the rubber composition for a tire tread. Specifically…",
  "path": "/patents/1080122",
  "publishedAt": "2005-02-09T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C1/0016",
    "SUMITOMO RUBBER IND [JP]"
  ],
  "textContent": "The present invention provides a rubber composition that improves processability and fuel efficiency without decreasing mechanical strength and abrasion resistance, which are excellent properties of natural rubber, and a pneumatic tire using the rubber composition for a tire tread. Specifically, the present invention provides a rubber composition for a tire tread comprising 5 to 150 parts by weight of silica having nitrogen-adsorbing specific surface area of 100 to 300 m/g and/or 5 to 150 parts by weight of carbon black having nitrogen-adsorbing specific surface area of at least 70 m/g and dibutyl phthalate oil absorption of at least 70 ml/100 g, based on 100 parts of a rubber component containing 5 to 100 % by weight of a deproteinized natural rubber having a weight average molecular weight of 1,400,000 and nitrogen content of at most 0.1 % by weight, and a pneumatic tire comprising the rubber composition for a tire tread.",
  "title": "Rubber composition for tire tread and pneumatic tire using the rubber composition"
}