STABLE LOW-VISCOUS EMULSION AND PROCESS FOR PREPARING THEREOF Russian patent published in 1994 - IPC

FIELD: chemical industry. SUBSTANCE: a stable low-viscous emulsion with a drop size of ≥15 and a viscosity of ≅1500 at a rate of 1s^-1 and 26.7 C is based on a viscous hydrocarbon with the addition of 20-30 % water and 0.1-5.0 % an emulsifier containing a mixture of a nonionic or anionic surfactant with 1.0-5.0 % ethoxylated phenolformaldehyde resin. The emulsion is prepared by mixing with an emulsifier and water in an amount that assures the maximum 15 % content of the emulsion in the mixture. The resultant mixture is heated to 49-93 C and stirred to obtain a concentrated emulsion with an oil drop size of not greater than 4 microns. This emulsion is diluted to a water content of 20-30 % in the desired product, heated to 60-104 C and stirred to an oil drop size of ≥15. EFFECT: improved properties of the emulsion and greater efficiency of the process. 3 cl, 1 dwg, 5 tbl