Sound absorbent panel

Details Sound absorbent panel Sound absorbent panel

1979-09-06

1982-09-28

Willis, Jr., P. E.

Compositions

Electrolytes for electrical devices

428489, C04B 4300

Patent

active

043517390

ABSTRACT:
A composition for sound absorbent panels, which may be utilized in construction elements, comprises a mixture of 70 to 97 weight percent of carbon-contained material and a binder of synthetic plastic material. The carbon-contained material used in the composition contains 50-60% of pure carbon and 40-50% of inorganic constituents and may be obtained from residues of coal hydrogenation or pitch filtration. The material is treated at an elevated temperature and under pressure before the binder is added thereto and then the obtained compound is formed into a panel.

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patent: 4193474 (1980-03-01), Okubo et al.
patent: 4204022 (1980-05-01), Snyder et al.

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