Hydraulic inorganic composition and molded articles thereof
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United States of America Patent
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Oct 13, 1992
Grant Date -
N/A
app pub date -
Jul 19, 1990
filing date -
Jul 19, 1989
priority date (Note) -
Expired
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Abstract
A hydraulic inorganic compositions which comprises a hydraulic inorganic powder at least one of polysaccharides selected from the group consisting of .beta.-1,3-glucans, pullulan and XCD-Polymer in an amount of 0.1-10 parts by weight in relation to 100 parts by weight of the hydraulic inorganic powder, and water in an effective amount. The composition preferably further contains a reinforcing fiber, a filler, in particular mountain leather, a coagulant and/or a second molding aid, in particular, methyl cellulose. The composition is hardened by hydration under normal pressure to provide a hardened molded article such as a cement board.
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