{
  "$type": "site.standard.document",
  "coverImage": {
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  "description": "The present invention pertains to a hydrous silica for rubber-reinforcing filler, having a BET specific surface area ranging from 230 to 350 m/g, and satisfies the following: a) the pore volume of 1.9 nm to 100 nm pore radius measured by the mercury press-in method (V) ranges from 1.40 to 2.00…",
  "path": "/patents/1283765",
  "publishedAt": "2021-02-18T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "C01B33/193",
    "TOSOH SILICA CORPORATION"
  ],
  "textContent": "The present invention pertains to a hydrous silica for rubber-reinforcing filler, having a BET specific surface area ranging from 230 to 350 m/g, and satisfies the following: a) the pore volume of 1.9 nm to 100 nm pore radius measured by the mercury press-in method (V) ranges from 1.40 to 2.00 cm/g; b) total pore volume in the range of 1.6 nm to 100 nm pore radius by the nitrogen adsorption/desorption method (V) ranges from 1.60 to 2.20 cm/g; and c) the pore volume ratio of (a) and (b) V/Vranges from 0.70 to 0.95. This invention provides a hydrous silica capable of further improving reinforcing properties of a rubber, particularly the wear resistance by improving dispersibility of the hydrous silica in the rubber in addition to rubber reinforcing properties obtained by a high BET specific surface area.",
  "title": "HYDROUS SILICA FOR RUBBER-REINFORCING FILLER"
}