Modifications of Methods for Making Cold-Mixed Oil Emulsions1

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Abstract
A cold-mixed lubricating oil emulsion can be made by the addition of 8 liquid ounces of crude cresylic acid, cresol U. S. P., or cyclohexanol to the usual proportions of potassium fish oil soap and oil called for in the boiled emulsion formula, adjusting the water content to give about 68 per cent oil by volume. The paste of oil, soap, and cresylic acid first obtained may be diluted at once with water to form a stock emulsion, or stored for future use. It will keep indefinitely if evaporation is prevented but should be mixed with a little water before being poured into the spray tank. When diluted to spray strength, this emulsion has the stability and small droplet size characteristic of diluted miscible oils. Any petroleum oil from kerosene to lubricating oil of high viscosity can be used to prepare this emulsion. A good cold-mixed emulsion can also be made with two gallons of oil and one quart of potassium fish oil soap. The soap-oil paste may be stirred at once into 3 quarts of water to make a stock emulsion or held for future use. Such emulsions appear to be as stable as those prepared according to the usual boiled emulsion formula.

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