HYDROXAMIC ACIDS AND HYDROXAMIC ACID ETHERS AND THEIR USE AS COMPLEXING AGENTS

摘要

Hydroxamic acids and hydroxamic acid ethers have formulae (I) and (II), in which Z<1> and Z<2> stand for the groups -NH-OY, -NR<1?-OY or -OX, at least one of the residues Z?1> or Z<2> in (I) or the residue Z<1> in (II) being -NH-OY or -NR<1>-OY; R<1> stands for C1-18-alkyl; X stands for hydrogen, alkaline metal, ammonium or substituted ammonium; Y stands for hydrogen, alkaline metal, ammonium, substituted ammonium or C1-18-alkyl; and L stands for a C1-100 bridging member which may also bear oxygen- and nitrogen-function groups. Excepted is the N,N-bis(carboxymethyl)-2-aminoacethydroxamic acid. The compounds (I) and (II) are suitable as complexing agents for alkaline earth and heavy metal ions, in particular as builders or bleaching agent stabilizers in washing and cleaning products.