High throughput screening methods for lubricating oil compositions
First Claim
1. A high throughput method for screening lubricating oil compositions, under program control, comprising the steps of:
- (a) providing a plurality of different lubricating oil composition samples comprising (i) a major amount of at least one base oil of lubricating viscosity and (ii) a minor amount of at least one lubricating oil additive;
(b) measuring wear stability of each sample to provide wear stability data for each sample, wherein the wear stability is measured by a test selected from the group consisting of an extreme pressure wear test, hydrodynamic wear test, corrosive wear test and a combination thereof;
(c) outputting the results of step (b);
(d) systemizing the outputted results of step (c) of each of the extreme pressure, hydrodynamic and corrosive wear tests, thereby assembling a library of the outputted results associated with each of the plurality of lubricating oil compositions, wherein each one of the wear tests is selected to be indicative of performance of a selected part of or an entire running internal combustion engine; and
(e) storing a reference value selected from desired operating conditions or statutory requirements and comparing the outputted results of at least one of the extreme pressure, hydrodynamic and corrosive wear tests of the plurality of lubricating oil compositions to the stored reference value in accordance with the program control.
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Abstract
A method for determining storage stability for a plurality of fluid lubricant samples of different lubricating oil compositions is provided. Each sample includes a combination of one or more base oils and one or more lubricating oil additives. The methods can advantageously be optimized using combinatorial chemistry, in which a database of combinations of lubricating oil additives or lubricating oil compositions containing such additives is generated. As market conditions vary and/or product requirements or customer specifications change, conditions suitable for forming desired products can be identified with little or no downtime.
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Citations
36 Claims
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1. A high throughput method for screening lubricating oil compositions, under program control, comprising the steps of:
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(a) providing a plurality of different lubricating oil composition samples comprising (i) a major amount of at least one base oil of lubricating viscosity and (ii) a minor amount of at least one lubricating oil additive; (b) measuring wear stability of each sample to provide wear stability data for each sample, wherein the wear stability is measured by a test selected from the group consisting of an extreme pressure wear test, hydrodynamic wear test, corrosive wear test and a combination thereof; (c) outputting the results of step (b); (d) systemizing the outputted results of step (c) of each of the extreme pressure, hydrodynamic and corrosive wear tests, thereby assembling a library of the outputted results associated with each of the plurality of lubricating oil compositions, wherein each one of the wear tests is selected to be indicative of performance of a selected part of or an entire running internal combustion engine; and (e) storing a reference value selected from desired operating conditions or statutory requirements and comparing the outputted results of at least one of the extreme pressure, hydrodynamic and corrosive wear tests of the plurality of lubricating oil compositions to the stored reference value in accordance with the program control. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A high throughput method for screening lubricating oil compositions, under program control, comprising the steps of:
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(a) providing a plurality of different lubricating oil composition samples comprising (i) a major amount of at least one base oil of lubricating viscosity and (ii) a minor amount of at least one lubricating oil additive; (b) measuring wear stability of each sample to provide wear stability data for each sample, wherein the wear stability is measured by a test selected from the group consisting of an extreme pressure wear test, hydrodynamic wear test, corrosive wear test and a combination thereof; (c) outputting the results of step (b); (d) systemizing the outputted results of step (c) of each of the extreme pressure, hydrodynamic and corrosive wear tests, thereby assembling a library of the outputted results associated with each of the plurality of lubricating oil compositions, wherein each one of the wear tests is selected to be indicative of performance of a selected part of or an entire running internal combustion engine; and (e) analyzing a change of the outputted results of each of the extreme pressure, hydrodynamic and corrosive wear stability tests stored in the library upon changing the plurality of conditions in accordance with the program control. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A high throughput method for screening lubricating oil compositions, under program control, comprising the steps of:
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(a) providing a plurality of different lubricating oil composition samples comprising (i) a major amount of at least one base oil of lubricating viscosity and (ii) a minor amount of at least one lubricating oil additive; (b) storing each of the plurality of lubricating oil composition in a respective vessel, and arranging a plurality of vessels in a predetermined sequence; (c) displacing the plurality of vessels of lubricating oil composition samples to a testing station configured to provide at least one of a extreme pressure wear stability test, hydrodynamic wear test, and the corrosive wear test to determine anti-wear properties of each of the tested lubricating oil composition samples in accordance with the program control; (d) measuring wear stability of each sample by a test selected from the group consisting of an extreme pressure wear test, hydrodynamic wear test, corrosive wear test and a combination thereof to provide wear stability data for each sample; and (e) outputting the results of step (d). - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification