| 摘要 |
A fire resistant construction board is covered with nonwoven glass fibre material on both surfaces and consists of a set mixt. of alpha hemihydrate, contg. 0.2-0.5 wt.% retarder, and alum (KAl(SO4)2.12H2O) in the wt. ratio 75:25 to 40:60, pref. 50:50. Pref. the glass fibre material is provided, on its outside, with a thin pre-coat of a mixt. of mainly beta hemihydrate or anhydrite and small amounts of an organic binder. Also claimed is a process for prodn. of the above board.
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| 申请人 |
GEBR. KNAUF WESTDEUTSCHE GIPSWERKE, 97346 IPHOFEN, DE |
发明人 |
RUF, HERBERT, 91413 NEUSTADT, DE;SCHELLER, LOTHAR, DIPL.-CHEM. DR., 97346 IPHOFEN, DE;NEUHAUSER, GERHARD, DIPL.-CHEM. DR., 97318 KITZINGEN, DE |
