METHOD OF PREPARING PARAFFIN WAX EMULSION FOR MAKING WOOD CHIPBOARDS Russian patent published in 2010 - IPC C10G73/40 C09D191/06 C09D191/08 C08L91/06 C08L91/08 C09K3/18 

FIELD: chemistry.

SUBSTANCE: method of preparing a paraffin wax emulsion involves preparation of a pre-emulsion by mixing a molten mixture of paraffin wax, mineral oil in concentration of 2.0-6.0 wt % of the emulsified mixture, an emulsifying agent in concentration of 3.0-8.0 wt % of the emulsified mixture and water. The mixture is stirred at 70-75°C for 15-25 minutes. Subsequent dispersion of the pre-emulsion is carried out in a hydrodynamic disperser at 70-75°C until an emulsion with average size of paraffin wax particles less than 1 mcm is obtained. The obtained emulsion is then cooled to temperature not over 25°C, held for 1 day and filtered. The paraffin wax mixture contains petroleum wax C₁₈-C₃₅ of the methane family with melting point of 45-65°C and C₃₆-C₅₅ isomeric structure with dropping point of 55-66°C with weight ratio of 90:10-10:90. The emulsifying agent used is non-ionic, anionic surfactants, a composition based on a mixture of stearin and/or stillage bottoms from production of fatty acids, esters of polyoxyethylated fatty alcohols and acids and an amine in weight ratio 1:1.0-1.5:1.0-1.5:0.5-1.0.

EFFECT: method enables to obtain paraffin was emulsion with high content (more than 60 wt %) of paraffin wax, which is stable for a long period of storage.

3 cl, 3 ex