Phosphine compounds and their use as tanning agents, corrosion inhibitors and biocides

摘要

The use in tanning of a THP oligomer of the formula : {HOCH2R<1>MP[RPR<1>M]n-CH2OH} x/y [X] where R is a divalent hydrocarbon radical having from 2 to 20 carbon atoms and optionally substituted with one or more substituents selected from the set consisting of halogen, hydroxy, carboxy, amino, alkylamino or -PR<1>mCH2OH groups or interrupted by one or more ether or carbonyl linkages, each R<1> is independently a monovalent hydrocarbon radical having from 1 to 25 carbon atoms and optionally substituted with one or more substituents selected from the aforesaid set, each m is 1 or 2, n is from 0 to 10, x is the number of groups in the molecule having m = 2 and X is a compatible anion of valency y such that the compound is water soluble. Compounds wherein at least one R<1> is a C8-25 alkyl are preferred, and are also useful in water treatment, e.g. as corrosion inhibitors and biocides.