FIELD: foundry.
SUBSTANCE: composition for making gasified cast patterns contains polypropylene, polymethyl methacrylate and a foaming agent. Polypropylene and polymethyl methacrylate are taken in ratio of 75:25 wt.%, respectively. Foaming agent is taken in amount of 0.5–5.0 wt.% over 100 wt.%.
EFFECT: ensures the production of cast iron castings of high quality in structure, mechanical properties, surface defects and gas porosity without deteriorating working conditions.
1 cl, 1 tbl
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