FIELD: metallurgy.
SUBSTANCE: binder is made on the basis of vegetable oil with addition of anionic surfactant selected from the series: sodium, potassium, tri-ethanol amine, mono-ethanol amine and ammonia salts of fat acids, tall oil, soap stock, tall pitch, colophony and mixes thereof. Non-ionic surfactant is added as the product of ethoxylation or propoxylation of alkyl phenols, fat acids, fat spirits, containing in it structure 2-15 ethoxylated or propoxylated links. Core sand does not stick to tooling. Possible are long-term storage and transportation at negative temperatures.
EFFECT: higher stability of binder emulsion, higher strength.
3 cl, 1 tbl
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