| abstract |
Ethylenediphosphinic acids and their salts of the general formula (I) in which A represents CR 5 R 6 -OH, AP (O) (OX) -CR 1 R 2 -CR 3 R 4 -P (O) (OX) - A (I) R 1, R 2, R 3, R 4, R 5 and R 6 are the same or different and mean, independently of each other, H, C1-C20 alkyl, C6-C20 aryl and / or aralkyl of C6-C20 and X represents H, an alkali metal, an element of the second main and secondary group, an element of the third main and secondary group, an element of the fourth main and secondary group, an element of the fifth main and secondary group, a element of the sixth secondary group, an element of the seventh secondary group, an element of the eighth secondary group and / or a nitrogen base. |