resistant resin of film-covering sand

Technical Index Model Appearance Moisture Softening Point(°C) Aggregation Speed(s) Free Phenol(%) Pf-103 Yellow pink and stripshape ≤0.5 85 95 20 45 ≤3.0 Under the experimental condition of 1000°C and 1min,the compressive strength under high temperature”0.15mpa,and with compressive experimental condition of 1000°C and 0.1mpa,the compressive time”150seconds,which is effective to prevent sand mold or sand core from deforming or cracking or occurring other casting defects under high temperature,and to meet requirements of sand mold and sand core with complex lumen inside of cylinder cover and water jacker of the motor.