METHOD FOR DETERMINING DISPERSING-STABILIZING PROPERTIES OF LUBRICATING OILS Russian patent published in 2006 - IPC G01N33/30 

FIELD: express-methods for determining presence and quality of dispersing-stabilizing properties, dispersing agent type for lubricating oils and determining engine oils among other oil types.

SUBSTANCE: method for determining dispersing-stabilizing properties of lubricating oils is performed by inserting into oil and dispersing therein of dirt agent and reaching calm state, while liquid dirt agent is injected into oil, which does not form a solution with oil, and after dispersion, emulsion is maintained in calm state, on basis of alternation of information parameters like loss of transparence and coloring of emulsion in colors from dark yellow to light yellow, quality estimate of presence of dispersion-stabilizing properties is determined with detection of engine oils, and on basis of alternation of information parameters like in form of intensiveness of coloring of emulsion in colors ranging from dark yellow to light yellow, time when dirt agent starts precipitating and/or time when emulsion starts dividing on distinct layers or absence of same, volume of precipitated dirt agent and/or height of column of layered emulsion during certain time limit or absence of same, volume of dirt agent inserted into oil, for which precipitation of dirt agent starts or layering of emulsion, and also - possible combination of same, quality estimate of workability level of dispersing-stabilizing admixture of lubricating oil is determined, as well as dispersant type.

EFFECT: decreased time consumption, increased information capacity of determination.

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