METHOD OF PREPARING FOAMING AGENT AND FOAMING AGENT PREPARED BY THIS METHOD Russian patent published in 2003 - IPC

FIELD: manufacture of building materials. SUBSTANCE: method comprises alkali hydrolysis of protein material, e.g. animal blood, reagent neutralization of hydrolysis product to low-alkaline pH value, addition of stabilizing additive (to preserve raw material), cooling, dilution with water, and foaming. Neutralizing reagent is added in amount 50-70% based on equivalent amount of alkali and stabilizing additive, in particular sodium citrate, is used in amount 0.5% of the weight of product before hydrolysis. EFFECT: improved reliability of preparation procedure and improved quality of foaming agent. 2 cl, 3 ex