Fluorinated lubricant additives

{
  "publication_number": "US6541430B1",
  "country": "US",
  "kind": "B1",
  "title": "Fluorinated lubricant additives",
  "abstract": "Fluorinated dialkyl dithiophosphoric acids according to formula (I) and metallic salts thereof: the compounds are useful, for example, as additives for lubricant compositions.",
  "claims": [
    "1. A process of making an anti-wear additive comprising: a) preparing a mixture of two or more compounds, wherein said mixture includes at least one fluorinated compound and at least one non-fluorinated compound; b) reacting the mixture with a thiophosphorus compound to form one or more oxygen linkages between the phosphorus atom of the thiophosphorus compound and each of the fluorinated and non-fluorinated compounds; and c) recovering a fluorinated dithiophosphoric acid compound having the molecular structure: wherein R 1 and R 2 are each independently selected from the group consisting of fluorinated C 1 to C 40 organic residues; and wherein R 1 and R 2 are the same or different, or R 1 and R 2 may form a ring.",
    "2. A process according to claim 1, further comprising reacting the product of formula (I) with a source of metal atoms to form a fluorinated metal dialkyl dithiophosphate."
  ],
  "description_excerpt": "1. Field of the Invention\n\nThis invention relates to lubricant additives that provide anti-wear and friction-reducing properties when incorporated into lubricant compositions or other compositions where such properties are desired, such as motor oils.\n\n2. Description of Related Art\n\nA significant source of deterioration in machinery such as engines and motors that contain moving parts in mechanical motion at high temperatures is friction and wear between the contact surfaces of the moving parts. Such deterioration is particularly evident at startup and shutdown of the machinery. To combat these problems, lubricating agents such as lubricating oils, waxes and greases have traditionally been applied to the moving contact surfaces to prevent wear and to reduce friction.\n\nReducing or controlling friction is particularly important in motor oils, including automobile motor oils, because of the need to reduce wear, and also because this wear reduction must be accomplished while at the same time meeting standards for fuel economy as well as environmental vehicle fuel emissions control. Because of increased government regulation of vehicle fuel emissions, efforts have been made to improve engine performance, including improving engine design and emissions catalyst performance, as well as developing better additives such as lubricants and engine oil additives.\n\nIdeally, a lubricant should provide lubrication of the entire contact surface. Such full-film contact is preferably achieved by completely coating the surfaces of the moving parts such that the parts never make contact.",
  "cpc": [
    "C10M 137/105",
    "C07F 9/165",
    "C07F 9/1651",
    "C10M 137/10"
  ],
  "ipc": [
    "C07F 3/06",
    "C07F 9/165",
    "C07F 9/18",
    "C10M 101/02",
    "C10M 137/10",
    "C10M 169/04"
  ],
  "assignees": [
    "EI Du Pont de Nemours and Co"
  ],
  "inventors": [
    "Richard P. Beatty"
  ],
  "filing_date": "2000-03-24",
  "publication_date": "2003-04-01",
  "grant_date": "2003-04-01",
  "priority_date": "2000-03-24",
  "application_number": "US-53450100-A",
  "family_id": "24130329",
  "cited_by_count": 62,
  "citations": [
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}