Foamed gypsum moulded articles and production thereof

Details Foamed gypsum moulded articles and production thereof Foamed gypsum moulded articles and production thereof

1981-05-12

1982-05-18

Van Balen, William J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

106 87, 264 42, 428703, 4283144, B32B 300, B32B 520, B32B 1300, B32B 1304

Patent

active

043305890

ABSTRACT:
Present invention provides foamed gypsum moulded articles excellent in sound absorbing property and production thereof. The foamed gypsum moulded article has many foam-cells, and the foam-cells are interconnected through fine passages. The fine passages are formed using as a decomposition catalyst of hydrogen peroxide for expansion a cobalt compound produced by pretreating a water soluble cobalt salt with hydrogen peroxide in the presence of alkali. The foamed gypsum moulded article is preferably applicable to an interial wall, ceiling panel, and the like.

REFERENCES:
patent: 1946077 (1934-02-01), Kauffmann
patent: 2024791 (1935-12-01), Adolph et al.
patent: 2371928 (1945-03-01), Schneider
patent: 3989534 (1976-11-01), Glunguian et al.
patent: 4040850 (1977-08-01), Kyri et al.
patent: 4043825 (1977-08-01), Muller et al.
patent: 4104077 (1978-08-01), Kobayashi et al.
patent: 4171985 (1979-10-01), Motoki et al.

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