Mastic composition and composite structural panels formed...

Details Mastic composition and composite structural panels formed... Mastic composition and composite structural panels formed...

B - Operations, Transporting

32

B

154/120

B32B 3/12 (2006.01)

Patent

CA 1079172

Abstract of the Disclosure A mastic composition formed of a substantially homogeneous imporous mixture of a predetermined volume of low-density expanded closed-cell synthetic resin beads and a slurry prepared from calcined gypsum and water wherein the interstitial volume of the expanded beads is not sub- stantially more than the volume of slurry. The substan- tially homogeneous mixture is self-adhering as a thick layer on an inverted smooth surface and yet separable therefrom as an integral layer, the mastic composition setting to a hard, strong, dimensionally stable, heat- and sound-retardant material. Methods of mixing mastic compositions, and composite structural panels utilizing mastic compositions as well as the methods and apparatus for forming such panels are also disclosed.

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