{
  "$type": "site.standard.document",
  "coverImage": {
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  "description": "A gas-permeable filter provided with oil repellency is provided. The gas-permeable filter includes a porous membrane having a surface coated with an oil-repellent agent. The oil-repellent agent includes a linear fluorine-containing hydrocarbon group represented by -R 1 C 5 F 10 CH 2 C 4 F 9 or -R 2…",
  "path": "/patents/980008",
  "publishedAt": "2014-01-08T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B01D39/1692",
    "NITTO DENKO CORP [JP]"
  ],
  "textContent": "A gas-permeable filter provided with oil repellency is provided. The gas-permeable filter includes a porous membrane having a surface coated with an oil-repellent agent. The oil-repellent agent includes a linear fluorine-containing hydrocarbon group represented by -R 1 C 5 F 10 CH 2 C 4 F 9 or -R 2 C 6 F 13 , and the porous membrane is a stretched polytetrafluoroethylene (PTFE) porous membrane. Here, R 1 and R 2 are each independently an alkylene group having 1 to 12 carbon atoms or a phenylene group. The gas-permeable filter is provided with oil repellency without significant reduction in gas permeability.",
  "title": "OIL-REPELLANT VENTILATION FILTER"
}