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US 6,642,186 B2Granted
Additive for lubricants
AssigneeE. I. Du Pont de Nemours and Company
InventorsRichard Paul Beatty, Peter Arnold Morken
Life of this patent
Estimating the term…
Abstract
Organic compounds containing selected functional groups, and which are grafted with fluorinated olefins, are excellent additives for lubricants which lower wear and/or friction. They are especially useful in metal lubricants.
Claims17
A composition comprising:
- (a) a major portion of a lubricant base, selected from the group consisting of petroleum derived lubricants, synthetic hydrocarbons, polyether oils, carboxylic esters, phosphoric acid esters, silicone containing oils, and halogenated hydrocarbons and halocarbons;
- and
- (b) a minor portion of a first lubricant additive which is an organic compound which is grafted with one or more fluorinated olefins and which, when combined with a lubricant base forms a fluorine-containing lubricant, the amount of fluorine in the lubricant composition being 200 parts per million to 10 per cent by weight;
- and provided that:
- said additive contains at least 5 percent by weight of fluorine;
- and
- said organic compound contains at least one functional group which can be adsorbed on a metal surface and wherein said functional group is selected from the group consisting of carboxylic esters, carboxylic acids, carboxylic amides, imides, amines, phosphoric acid derivatives, phosphonic acid derivatives, dithiophosphate esters, ethers, hydroxyls, carbonates, thio derivatives thereof, and heterocyclic groups:
- and wherein said fluorine-containing lubricant contains 200 parts per million to 10 percent by weight of fluorine.
5 more elements
An apparatus, comprising:
- (a) a first part which is metal;
- (b) a second part which is in apparent contact with said first metal part, and said first part and second part move with respect to one another;
- and
- (c) a lubricant which comprises:
- (i) a major portion of a lubricant base;
- and
- (ii) a minor portion of a first lubricant additive which is an organic compound which is grafted with one or more fluorinated olefins and which, when combined with a lubricant base, forms a lubricant;
- and provided that:
- said additive contains at least 5 percent by weight of fluorine;
- and
- said organic compound contains at least one functional group which can be adsorbed on a metal surface and wherein said functional group is selected from the group consisting of carboxylic esters, carboxylic acids, carboxylic amides, imides, amines, phosphoric acid derivatives, phosphonic acid derivatives, dithiophosphate esters, ethers, hydroxyls, carbonates, thio derivatives thereof, and heterocyclic groups.
8 more elements
Dependencies are inferred from the claim text.