Sand mould casting release agent prepared through precipitated silica

TLDR: In this paper, a sand mold casting release agent is described, which is prepared from 15-20 parts of precipitated silica, 15- 20 parts of cycloaliphatic epoxide resin, 15 -20 part of melamine resin, 8-12 parts of cinerite, 5-9 parts of petroleum coke, 4-7 parts of nitrocotton, 4 7 parts of hydrogenated castor oil, 3-6 parts of asbestos wool, 3 6 parts of sulphate aluminium cement, 2-4 parts of polyacrylamide,

Abstract: The invention discloses a sand mould casting release agent prepared through precipitated silica, and relates to the technical field of precipitated silica. The sand mould casting release agent is prepared from 15-20 parts of precipitated silica, 15-20 parts of cycloaliphatic epoxide resin, 15-20 parts of melamine resin, 8-12 parts of cinerite, 5-9 parts of petroleum coke, 4-7 parts of nitrocotton, 4-7 parts of hydrogenated castor oil, 3-6 parts of asbestos wool, 3-6 parts of sulphate aluminium cement, 2-4 parts of polyacrylamide, 2-4 parts of superfine glass dust, 2-4 parts of vulcanized lard oil, 1-2 parts of nanometer titanium dioxide, 1-2 parts of nanometer rubber powder, 1-2 parts of nano-graphite powder, 0.5-1 part of aluminum powder, 0.5-1 part of rice chaff ash, 20-25 parts of n-butyl acetate and 20-25 parts of n-butyl alcohol. The release agent is directly sprayed to a sand mould, a layer of isolating membrane can be formed on the surface of the sand mould, and therefore the release effect is achieved; and in addition, the isolating membrane is high in adherence and good in high-temperature resistance and abrasive resistance, and melting and gasification can be avoided in the casting process of castings.