Sealant for screwing members

{
  "publication_number": "US11512206B2",
  "country": "US",
  "kind": "B2",
  "title": "Sealant for screwing members",
  "abstract": "A sealant for screwing members contains: (a) a self-cross-linking aqueous emulsion; (b) a nanofiberized aramid fiber substance; and (c) a film-forming aid containing a mixture. The mixture contains a compound represented by formula 1: CH 3 O - (CH 2 CH 2 O) n - H. In formula 1, n is 4 or more. An equilibrium reflux boiling point of the overall mixture is 280° C. or higher.",
  "claims": [
    "1. A sealant for screwing members comprising: (a) a self-cross-linking aqueous emulsion; (b) a nanofiberized aramid fiber substance; and (c) a film-forming aid containing a mixture, wherein the mixture contains a compound represented by the following formula 1: CH 3 O - (CH 2 CH 2 O) n - H (Formula 1), n is 4 or more, and an equilibrium reflux boiling point of the overall mixture is 280° C. or higher.",
    "2. The sealant for screwing members according to claim 1, wherein the mixture contains the compound in an amount of 50% by mass or more.",
    "3. The sealant for screwing members according to claim 1, wherein the component (a) is a styrene-(meth)acrylic acid ester copolymer emulsion.",
    "4. The sealant for screwing members according to claim 1, wherein an aspect ratio of the component (b) is 1,000 to 3,000.",
    "5. The sealant for screwing members according to claim 1, wherein an addition amount of a solid content of the component (b) based on 100 parts by mass of a solid content of the component (a) is 0.1 to 3.0 parts by mass.",
    "6. The sealant for screwing members according to claim 1, wherein an addition amount of the component (c) based on 100 parts by mass of a solid content of the component (a) is 54 to 79 parts by mass.",
    "7. A method for manufacturing a screwing member comprising coating the screwing member with the sealant for screwing members according to claim 1.",
    "8. A screwing member coated with the sealant for screwing members according to claim 1."
  ],
  "description_excerpt": "The present invention relates to a sealant for screwing members, a screwing member, and a method for manufacturing the same.\n\nHeretofore, a seal tape has been used as a sealant for tight adhesion of a screwed portion such as a pipe joint. The purpose of using the seal tape for the screwed portion is to prevent the leakage of a liquid or gas or the like by filling gaps occurring in a connected portion of pipes, or the like. The seal tape contains a fluorine resin as a main material. The seal tape is likely to tightly adhere to the screwed portion because of its softness, and the fluorine resin is flexibly deformed when the seal tape is tightened into equipment, to allow a clearance with the equipment to be filled with the fluorine resin. Therefore, the seal tape has been used as the sealant. In a method for covering the screwing member with the seal tape, the seal tape has been wound around the screwing member by using a winding device or manually. In such a seal tape winding device, for example, a device disclosed in Patent Literature 1, a screwing member and a seal tape are set in the device to cover the screwing member with the seal tape according to the switching of ON/OFF of a switch. However, only one screwing member can be covered by the single switching of ON/OFF of the switch for each device, and works of attaching the screwing members must be continuously performed, to result in poor work efficiency. This has a problem in terms of productivity.\n\nThen, in order to solve this problem, a sealant containing a liquid resin composition has been developed.",
  "cpc": [
    "C09D 5/024",
    "C08K 7/02",
    "C08L 2203/12",
    "C08L 77/06",
    "C09D 125/14",
    "C09D 133/08",
    "C09D 133/10",
    "F16B 33/004",
    "F16J 15/102"
  ],
  "ipc": [
    "C08K 7/02",
    "C08L 77/06",
    "C09D 125/14",
    "C09D 133/08",
    "C09D 133/10",
    "C09D 5/02",
    "F16B 33/00"
  ],
  "assignees": [
    "ThreeBond Co Ltd"
  ],
  "inventors": [
    "Erika WASHINO"
  ],
  "filing_date": "2018-12-04",
  "publication_date": "2022-11-29",
  "grant_date": "2022-11-29",
  "priority_date": "2017-12-06",
  "application_number": "US-201816764610-A",
  "family_id": "66751608",
  "cited_by_count": 0,
  "citations": [
    "JPH10120311A",
    "JPH10288214A",
    "JP2008069869A",
    "JP2009052734A",
    "JP2010106222A",
    "US20110213069A1",
    "US20150133591A1",
    "JP2015524006A",
    "JP2017110100A"
  ]
}