| 主权项 |
1. Mono-substituted phosphinic acid of formula (I) wherein X is H+, an alkali metal ion, alkaline earth metal ion, divalent or trivalent metal ion, ammonium ion, organic ammonium group or an organic radical with a molecular weight of ≦200 g/mol; wherein Y represents one of the formulas (II) to (VI) where (P) and (W) correspond to P and W, respectively, in formula (I), wherein W represents one of the formulas (VII) to (X); where (Y) and (R1) correspond to Y and R1, respectively, in formula (I), wherein R1 is H, an alkyl group, an alkylaryl group, or the formula (XI) wherein the substituent A independently represents a C2- to C4-alkylene group, the subscript q has a value of 2 to 300, the subscript n represents a value of 2 to 4, and the subscript r represents a value of 0 to 1, wherein R2, R3 and R4 independently represent H, CH3, COOH or CH2—COOH, R5 is —CH2—CH2— or —CH2—CH(CH3) and R6 is O or N. |
