| 摘要 |
Dust-free investment materials for producing precision castings consisting of water-soluble phosphates, magnesium oxide and silicon dioxide are obtained when the investment material is divided into two components a and b, where component a contains all the magnesium oxide, where appropriate a part of the silicon dioxide and, if silicon dioxide is present, 0.4 to 6% by weight of a hydrophilic organic solvent, and component b contains the phosphate, the remainder of the silicon dioxide and at least 0.5% by weight of water. |
| 申请人 |
DEGUSSA AG, 6000 FRANKFURT, DE |
发明人 |
GANTERT, GERLINDE, DIPL.-ING., 6458 RODENBACH, DE;KEMPF, BERN, DIPL.-ING. DR., 6364 FREIGERICHT, DE;GUNDLACH, KLAUS-PETER, DIPL.-CHEM. DR., 4508 BOHMTE, DE;KUMP, ULRICH, DIPL.-PHYS. DR., 6000 FRANKFURT, DE |
