发明名称 |
KOMPOSIT-MATERIAL UND VERFAHREN ZUR HERSTELLUNG. |
摘要 |
<p>An improved composite material is produced by mixing ground gypsum and a plurality of host particles, each having accessible voids therein, together with sufficient liquid to form a dilute slurry; heating the slurry under pressure to a temperature sufficient to calcine the gypsum to calcium sulphate hemihydrate; allowing the calcium sulphate molecules to nucleate and form crystals in-situ in and about the voids in the host particles; dewatering the hot slurry; and drying the dewatered solids to remove substantially all the remaining free water and stabilize the calcium sulphate crystals while still physically interlocked with the host particles. According to a further aspect of the invention, an improved wallboard comprising a plurality of host cellulosic particles each having accessible voids in its body; and calcium sulphate crystals, at least some of which are formed in-situ in and about a significant portion of the accessible voids in the host particles, whereby the host cellulosic particles are physically interlocked with the calcium sulphate crystals.</p> |
申请公布号 |
DE68921009(D1) |
申请公布日期 |
1995.03.16 |
申请号 |
DE1989621009 |
申请日期 |
1989.11.07 |
申请人 |
USG ENTERPRISES, INC., CHICAGO, ILL., US |
发明人 |
BAIG, MIRZA, A., DES PLAINES, IL 60016, US |
分类号 |
C04B16/02;B28B3/02;B32B13/10;B32B21/00;C04B11/00;C04B11/02;C04B11/024;C04B28/14;C04B111/20;(IPC1-7):C04B11/024 |
主分类号 |
C04B16/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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