MULTILAYER POLYMER SOUND-ABSORBING COATING Russian patent published in 2017 - IPC G10K11/16 

FIELD: chemistry.

SUBSTANCE: multilayer polymer sound-absorbing coating made on the basis of a polymer composition, including polymer binders, functional fillers, target and pigmentation additives with the following component ratio, wt %: dispersion of copolymer of butyl acrylate and styrene 55-30; particles of micrometre 10-15; microspheres of aluminium oxide 15-20; particles of ethylene propylene elastomer 10-15; sodium tripolyphosphate 0.5-2.0; isothiazolone 0.4-0.8; emulsified mineral oil 0.5-2.0; butylglycol 1-3; sodium polyacrylate 2-4; titanium dioxide 5-10.

EFFECT: composition has the ability to form any kind of multilayer, microporous, sound-absorbing coating on the surface of materials, with high acoustic indices, operating in the range of sound frequencies from 100 to 2000 Hz.

2 cl, 1 dwg, 3 tbl