COMPOSITION OF BINDER USED FOR IMPREGNATION OF FIBROUS FILLER, AND NOISE-SUPPRESSING MATERIAL ON THE BASIS OF IT

摘要

FIELD: noise-suppressing materials. SUBSTANCE: composition for binder has diphenylolpropane, formaldehyde, sodium hydroxide and water at the following ratio of components, wt. -%: diphenylolpropane 2-15; formaldehyde 0.3-4.0; sodium hydroxide 0.4-6.0, and water - the rest. Noise-suppressing material has fibrous filler and binder representing a product of interaction of diphenylolpropane, formaldehyde and sodium hydroxide at the following ratio of material components, wt.-%: fibrous filler 70-97, and binder - the rest. EFFECT: improved acoustic parameters of noise-suppressing material. 3 cl, 1 tbl