| 发明名称 |
D,L Tartaric acid as retardant for gypsum plaster |
| 摘要 |
Industrial gypsum plaster (plaster of Paris) having a delayed setting time is prepared by including D,L-tartaric acid and sufficient calcium hydroxide that a 5 weight % aqueous suspension of the plaster has a pH of at least 11.5.
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| 申请公布号 |
US4094693(A) |
申请公布日期 |
1978.06.13 |
| 申请号 |
US19760723173 |
申请日期 |
1976.09.14 |
| 申请人 |
DEUTSCHE GOLD- UND SILBER-SCHEIDEANSTALT VORMALS ROESSLER |
发明人 |
KNORRE, HELMUT;LANGER, MANFRED;LEIDL, PETER |
| 分类号 |
C04B24/06;C04B28/14;(IPC1-7):C04B11/14 |
主分类号 |
C04B24/06 |
| 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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