| 摘要 |
<p>1. Phosphonic ester in which two phosphorus atoms are connected to an organic group by means of a direct phosphorus-carbon bond, according to the formula see diagramm : EP0023173,P20,F1 in which A is an aliphatic group, one of the carbon atoms of which can be connected to a phosphorus atom of a group see diagramm : EP0023173,P20,F2 wherein R and R" are the same or different and represent C1 to C20 alkyl groups, characterized in that the R' groups are hydrogen atoms or alkali metal atoms or quaternary ammonium cations, the aliphatic group A having 3 to 6 carbon atoms.</p> |
