METHOD OF PRODUCING ANTICORROSION COMPOSITION FOR PROTECTING CHEMICAL AND PETROCHEMICAL EQUIPMENT (VERSIONS) Russian patent published in 2009 - IPC C09D5/08 C09D163/02 

FIELD: chemistry.

SUBSTANCE: according to the first version of the method, an active base - resinous wood, separated through steam distillation from non-recycled wastes from production of epichlorohydrin, is heated to 55-70°C for 0.5-1.0 hours. Epoxy resin "ЭД-20" or "ЭД-18", dioctylphthalate and a solvent are then added. The reaction mixture is stirred at 45-80°C for 1.0-1.5 hours. The components are taken in the following ratio, in wt %: 65-85 active base, 2.0-3.5 of the above mentioned epoxy resin, 0.4-0.6 dioctylphthalate, and solvent constitutes the rest. The second version of the method involves mixing the active base - resinous wood, separated through steam distillation from non-recycled wastes from production of vinyl chloride, and a solvent at 60-70°C for 2 hours. Dioctylphthalate is then added, as well as epoxy resin "ЭД-20" or "ЭД-18" and polyethylenepolyamines, and the reaction mixture is kept at 65-75°C for 2 hours. The components are taken in the following ratio, in wt %: 60-80 active base, 0.35-0.5 dioctylphthalate, 2.8-3.5 of the above mentioned epoxy resin, 0.6-1.2 polyethylenepolyamines, and solvent constitutes the rest.

EFFECT: increased resistance to effect of aggressive media and simplification of preparation of the composition.

4 cl, 2 tbl