发明授权
US4401473A Use of dimethylphosphinylalkanephosphonic acid as a setting retarder in
gypsum
失效
在石膏中使用二甲基膦基烷基膦酸作为凝结缓凝剂
- 专利标题: Use of dimethylphosphinylalkanephosphonic acid as a setting retarder in gypsum
- 专利标题(中): 在石膏中使用二甲基膦基烷基膦酸作为凝结缓凝剂
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申请号: US351576申请日: 1982-02-23
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公开(公告)号: US4401473A公开(公告)日: 1983-08-30
- 发明人: Hans-Jerg Kleiner , Volker Knittel , Gerhard Debus
- 申请人: Hans-Jerg Kleiner , Volker Knittel , Gerhard Debus
- 申请人地址: DEX
- 专利权人: Hoechst Aktiengesellschaft
- 当前专利权人: Hoechst Aktiengesellschaft
- 当前专利权人地址: DEX
- 优先权: DEX3027040 19800717
- 主分类号: C04B24/00
- IPC分类号: C04B24/00 ; C07F9/53 ; C04B11/00 ; C01F11/46 ; C04B11/14
摘要:
The invention relates to dimethylphosphinylalkanephosphonic acids of the general formula I, in which n is 1 or 2, which are used as setting retarders for gypsum. ##STR1##
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