Foamed gypsum moulded articles and production thereof

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

B - Operations, Transporting

32

B

261/47

B32B 5/20 (2006.01) C04B 28/14 (2006.01)

Patent

CA 1162203

- 1 - Abstract The present invention provides foamed gypsum moulded articles of good-sound absorbing ability. The foamed gypsum moulded article has many foam-cells, and the foam-cells are interconnected by 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 an alkali. The foamed gypsum moulded article is suitable as an interior wall, ceiling panel, or the like.

377564

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