SOUND-ABSORBING MATERIAL FOR TRUCK SOUND-ABSORBING SCREENS WITH REDUCED FLAMMABILITY Russian patent published in 2023 - IPC B60R13/08 G10K11/162 

FIELD: sound absorption and heat insulation.

SUBSTANCE: invention relates to the creating sound-absorbing and heat-insulating materials that are intended for sound absorption of a truck and its parts in the frequency range from 100 to 1600 Hz, for example, floors, sound-absorbing screens, where requirements for effective sound absorption, especially where these requirements are coupled with requirements for low flammability of the material. Sound-absorbing material, including polyol and isocyanate components of the urethane-forming mixture, thermally expanding graphite additionally comprises aluminosilicate microspheres and barium sulfate at a ratio of components, wt.h: polyol component 100, isocyanate component 50, thermally expanding graphite 1.5-10, aluminosilicate microspheres 0.5, barium sulfate 1.

EFFECT: reduced flammability.

1 cl, 3 tbl