Mastic composition and composite structural panels formed theref

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

1975-04-30

1978-02-28

Lesmes, George F.

Stock material or miscellaneous articles

Structurally defined web or sheet

Honeycomb-like

52618, 428443, 428 73, 428538, 428118, 428119, 428920, 260 25B, B32B 312

Patent

active

040768805

ABSTRACT:
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 substantially less than the volume of slurry. The substantially 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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patent: 3598672 (1971-08-01), Heller
patent: 3630820 (1971-12-01), Leach
patent: 3673058 (1972-06-01), Jackson et al.
patent: 3697366 (1972-10-01), Harlock et al.
patent: 3753843 (1973-08-01), Hutchison

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