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

Use of dimethylphosphinylalkanephosphonic acid as a setting retarder in
gypsum
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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