BINDER FOR MANUFACTURE OF MOLD CORES AND HOT-CURED MOLDS Russian patent published in 1997 - IPC

FIELD: foundry. SUBSTANCE: industrial lignosulfonates are mixed to fully dissolve with nonionic surfactant relating to subclass of oxyethylated fatty acids having fractions with carbon atm number from 11 to 25 and number of group C₂H₄O from 5 to 20, comprising homologous series including demulsifier OZhK, laurox 9, oleox 5, oleox 7, steorox 6, steorox 920, syntanox 14-18, ricinox 80, naphenox, inhibitor 13-15/41. Binder has higher binding ability of binder due to adopted ratio in binder of industrial lignosulfonate and indicated nonionic surfactants, fulfilling function of modificator, of 1:(0.03-0.30) that result in higher dry tensile strength of mold or core mixture up to 3 MPa, or to specific strength up to 0.5 MPa. EFFECT: higher efficiency. 2 tbl