Automotive friction reducing composition
OwnerGary G. Clarkinventor
Life of this patent
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Abstract
A friction reducing additive for addition to the lubricating oil crankcase of an internal combustion engine, such as in an automobile, is provided. The additive comprises (a) a hydrocarbon oil of lubricating viscosity; (b) an extreme pressure antiwear agent comprising: (i) an oil dispersion of solid inorganic film-forming potassium borate, (ii) antimony diaklylphosphorodithioate, and (iii) a liquid chlorinated paraffin; (c) an alkaline material; and (d) a viscosity index improver. The preferred additive composition of the present invention also contains an antioxidant and an antifoaming agent.
Claims30
A friction reducing additive for direct addition to a lubricating oil crankcase, said additive comprising:
- (a) a hydrocarbon oil of lubricating viscosity;
- (b) an extreme pressure antiwear agent comprising a mixture of the following components:
- (i) an oil dispersion of solid inorganic film-forming potassium borate;
- (ii) antimony dialkylphosphorodithioate, and
- (iii) a liquid chlorinated paraffin;
- (c) an alkaline material in sufficient quantity for neutralizing acid components generated during use of said additive and having a total base number between about 10 and 400;
- and
- (d) a viscosity index improving agent.
A friction reducing additive for direct addition to an automotive lubricating oil crankcase, said additive comprising:
- (a) from about 20 to about 65% by volume of a solvent neutral hydrocarbon oil of lubricating viscosity;
- (b) from about 2 to about 25% by volume of an extreme pressure antiwear agent comprising an oil dispersion of inorganic, solid, film-forming potassium borate;
- (c) from about 1 to about 20% by volume of an extreme pressure antiwear agent comprising antimony dialkylphosphorodithioate;
- (d) from about 2 to about 35% by volume of an extreme pressure antiwear agent comprising a liquid chlorinated paraffin;
- (e) from about 0.4 to about 20% by volume of overbased calcium sulfonate having a total base number between about 10 and 400, said calcium sulfonate being sufficient to neutralize acid components generated during use of said additive;
- (f) from about 4 to about 35% by volume of an olefin copolymer viscosity improver;
- (g) from about 0 to about 20% by volume of an aryl amine antioxidant agent;
- and
- (h) about 20 ppm by weight of a silicone based antifoam agent.
A method for reducing friction and wear in an oil lubricated internal combustion engine, comprising adding to the engine oil in the crankcase of said engine from about 3 to about 12% by volume of an additive having the following composition:
- (a) a hydrocarbon oil of lubricating viscosity;
- (b) an extreme pressure antiwear agent comprising a mixture of the following components:
- (i) an oil dispersion of solid, inorganic film-forming potassium borate;
- (ii) antimony dialkylphosphorodithioate, and
- (iii) a liquid chlorinated paraffin;
- (c) an alkaline material in sufficient quantity for neutralizing acid components generated during use of said additive and having a total base number between about 10 and 400;
- and
- (d) a viscosity index improving agent.
A method for producing a friction reducing composition comprising the steps of:
- (a) blending (i) a hydrocarbon oil of lubricating viscosity, (ii) an oil dispersion of solid film-forming potassium borate, (iii) antimony dialkylphosphorodithioate, (iv) a liquid chlorinated paraffin, and (v) a viscosity index improver at an elevated temperature not exceeding about 150.degree. F.;
- (b) cooling the blend produced in step (a) to a temperature in the range of from about 90.degree. to about 100.degree. F.;
- and
- (c) adding to the cooled blend an alkaline material in sufficient quantity for neutralizing acid components generated during use of said friction reducing composition as an additive in automotive lubricating oil, said alkaline material having a total base number between about 10 and 400.
Dependencies are inferred from the claim text.