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US 6,204,227 B1Granted
Metal working lubricant composition
AssigneePABU Services, Inc.
InventorsArvind M. N. Rao, Douglas G. Placek
Life of this patent
Estimating the term…
Abstract
Concentrated lubricant compositions that, upon dilution, produce emulsions that are useful as lubricants in metal working processes are described. The compositions comprise a substantially neutral phosphate ester and one or more non-ionic surfactants. By appropriate choice of surfactants both microemulsions and macroemulsions can be produced. The emulsions are stable for at least one month at room temperature and offer improved lubricity when used in metal working operations.
Claims33
A concentrated lubricant composition for use in metal working operations, the composition comprising:
- a substantially neutral phosphate ester, said phosphate ester comprising a mixture of a tri(alkylphenyl)phosphate, a di(alkylphenyl)monophenyl phosphate, a mono(alkylphenyl)diphenylphosphate, and triphenyl phosphate, in which each alkyl group contains one to six carbon atoms;
- a surfactant;
- a non-ionic alcohol;
- and
- water;
- in which:
- the phosphate ester comprises 5% to 30% by weight of the composition;
- the surfactant and the non-ionic alcohol together comprise 10% to 60% by weight of the composition;
- the ratio of the total weight of the surfactant and the non-ionic alcohol to the weight of the phosphate ester is 2:1 to 12:1;
- and
- the composition is a microemulsion.
8 more elements
A method for working metal, the method comprising:
- (a) contacting a metal workpiece with an effective lubricating amount of a lubricant composition;
- and
- (b) working the metal workpiece;
- in which:
- the lubricant composition comprises:
- a substantially neutral phosphate ester, said phosphate ester comprising a mixture of a tri(alkylphenyl)phosphate, a di(alkylphenyl)monophenyl phosphate, a mono(alkylphenyl)diphenylphosphate, and triphenyl phosphate, in which each alkyl group contains one to six carbon atoms;
- a surfactant selected from the group consisting of high HLB surfactants and low HLB surfactants;
- a non-ionic alcohol;
- and
- water;
- the phosphate ester comprises 0.1% to 5% by weight of the composition;
- the surfactant and the non-ionic alcohol together comprise 0.2% to 20% by weight of the composition;
- the ratio of the total weight of the surfactant and the non-ionic alcohol to the weight of the phosphate ester is 2:1 to 12:1;
- and
- the composition is a microemulsion.
12 more elements
A concentrated lubricant composition for use in metal working operations, the composition comprising:
- a substantially neutral phosphate ester said phosphate ester comprising a mixture of tri(alkylphenyl)phosphate, a di(alkylphenyl)monophenyl phosphate, a mono(alkylphenyl)diphenylphosphate, and triphenylphosphate, in which each alkyl group contains one to six carbon atoms;
- up to about 10% by weight of an extreme pressure additive;
- a surfactant;
- a non-ionic alcohol;
- and
- water;
- in which:
- the phosphate ester and the extreme pressure additive together comprise 5% to 30% by weight of the composition;
- the surfactant and the non-ionic alcohol together comprise 10% to 60% by weight of the composition;
- the ratio of the total weight of the surfactant and the non-ionic alcohol to the total weight of the phosphate ester and the extreme pressure additive is 2:1 to 12:1;
- and
- the composition is a microemulsion.
9 more elements
A method for working metal, the method comprising:
- (a) contacting a metal workpiece with an effective lubricating amount of a lubricant composition;
- and
- (b) working the metal workpiece;
- in which:
- the lubricant composition comprises:
- a substantially neutral phosphate ester said phosphate ester comprising a mixture of tri(alkylphenyl)phosphate, a di(alkylphenyl)monophenyl phosphate, a mono(alkylphenyl)diphenylphosphate, and triphenylphosphate, in which each alkyl group contains one to six carbon atoms;
- up to about 10% by weight of an extreme pressure additive;
- a surfactant;
- a non-ionic alcohol;
- and
- water;
- the phosphate ester and the extreme pressure additive together comprise 5% to 30% by weight of the composition;
- the surfactant and the non-ionic alcohol together comprise 10% to 60% by weight of the composition;
- the ratio of the total weight of the surfactant and the non-ionic alcohol to the total weight of the phosphate ester and the extreme pressure additive is 2:1 to 12:1;
- and
- the composition is a microemulsion.
13 more elements
A method for working metal, the method comprising:
- (a) contacting a metal workpiece with an effective lubricating amount of a lubricant composition;
- and
- (b) working the metal workpiece;
- in which:
- the lubricant composition comprises:
- a substantially neutral phosphate ester, said phosphate ester comprising a mixture of a tri(alkylphenyl)phosphate, a di(alkylphenyl)monophenyl phosphate, a mono(alkylphenyl)diphenylphosphate, and triphenyl phosphate, in which each alkyl group contains one to six carbon atoms;
- a surfactant;
- a non-ionic alcohol;
- and
- water;
- the phosphate ester comprises 5% to 30% by weight of the composition;
- the surfactant and the non-ionic alcohol together comprise 10% to 60% by weight of the composition;
- the ratio of the total weight of the surfactant and the non-ionic alcohol to the weight of the phosphate ester is 2:1 to 12:1;
- and
- the composition is a microemulsion.
12 more elements
A concentrated lubricant composition for use in metal working operations, the composition comprising:
- a substantially neutral phosphate ester, said phosphate ester comprising a mixture of a tri(alkylphenyl)phosphate, a di(alkylphenyl)monophenyl phosphate, a mono(alkylphenyl)diphenylphosphate, and triphenyl phosphate, in which each alkyl group contains one to six carbon atoms;
- a surfactant selected from the group consisting of high HLB surfactants and low HLB surfactants;
- a non-ionic alcohol;
- and
- water;
- in which:
- the phosphate ester comprises 0.1% to 5% by weight of the composition;
- the surfactant and the non-ionic alcohol together comprise 0.2% to 20% by weight of the composition;
- the ratio of the total weight of the surfactant and the non-ionic alcohol to the weight of the phosphate ester is 2:1 to 12:1;
- and
- the composition is a microemulsion.
8 more elements
Dependencies are inferred from the claim text.