FIELD: FILTRATION PROCESSES. SUBSTANCE: composition contains (in wt %): granular material with filtration ability, 80-96; polyol component, 1-15; polyisocyanate component, 0.5-15; organotin compound with molecular weight above 600 as catalyst, 0.000005-0.1; fine silicic acid and/or bentonite, 0.005-2.0; and aluminosilicate in pasty form, 0.01-2.0. EFFECT: improved filtration capacity. 3 cl
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