{
  "$type": "site.standard.document",
  "description": "Provided are a natural rubber which maintains processability and is excellent in a breaking resistance and a wear resistance, a rubber composition containing the above natural rubber, and a tire prepared by using the same. [0002] The natural rubber of the present invention is obtained by…",
  "path": "/patents/962365",
  "publishedAt": "2015-03-18T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C1/00",
    "BRIDGESTONE CORP [JP]"
  ],
  "textContent": "Provided are a natural rubber which maintains processability and is excellent in a breaking resistance and a wear resistance, a rubber composition containing the above natural rubber, and a tire prepared by using the same. [0002] The natural rubber of the present invention is obtained by gelatinizing or multi-coupling a natural rubber latex or a natural rubber and comprises 15 % by mass or more of a high molecular weight component, P1, having a molecular weight of 5,000,000 to 50,000,000 and 40 % by mass or less of an ultrahigh molecular weight component, P2, having a molecular weight of exceeding 50,000,000, and the relation between mass% of P1 and mass% of P2 is 1.5 × mass% of P1 ≥ mass% of P2, each measured by the following measuring method, wherein a measuring method for a rubber molecular weight is measured by means of a field flow fractionation equipment with a multi-angle light scattering detector for a soluble part of a centrifuged rubber solution at a centrifugal acceleration of 10,000 to 1,000,000 G.",
  "title": "NATURAL RUBBER, RUBBER COMPOSITION COMPRISING NATURAL RUBBER AND METHOD FOR PRODUCING SAME, AND TIRE"
}