ANTISTICK AGENT FOR DISPOSABLE PATTERNS Russian patent published in 1994 - IPC

FIELD: foundry. SUBSTANCE: antistick agent contains, mas.%: hydrolyzed polyacrylonitrile 3.2-3.5; sodium tripolyphosphate 0.2-0.8; boric acid 0.05-0.15; latex 0.3-2.4; tridymite and/or cristobalite 30-45; water 30-40; the balance, refractory filler based on silicon oxide. Agent is prepared as follows: introduced into paint agitator is half the rated amount of water, alkali-silicic ingredient based on tridymite and/or cristobalite, boric acid and 50% solution of sodium tripolyphoshate, and mixed to obtain homogeneous consistency and added to mixture are hydrolyzed polyacrylonitrile in form of 15% solution, refractory filler, latex and remaining rated amount of water. Duration is 3-5 min. EFFECT: higher efficiency. 2 tbl