PEROXY COMPOUNDS

摘要

A safe and effective selection of compounds suitable for bleaching or disinfection or incorporation in compositions for such purposes comprises sulphoperoxyacids which satisfy Formula (I), in which the carboxylic acid substituent is bonded directly to the benzene nucleus or represents an alkylene group, preferably containing a moiety of at least 3 linear carbons, which conveniently can comprise its backbone, R'' represents at least one alkyl group and the total number of carbon atoms in R' + R'' is from 4 to 18, and in which the -CO3H and -SO3M substituents are separated by at least 3 carbons linearly, and M represents an alkali metal. Preferably, the sulphoperoxyacid is 3-sulpho-4-n pentyl-perbenzoic acid, monopotassium salt, or 3-sulpho-4-n heptyl-perbenzoic acid, monopotassium salt or 6-(3-methyl-4-sulpho-phenyl)-perhexanoic acid, monopotassium salt or 6-(3,5-dimethyl-2-sulpho-phenyl)-perhexanoic acid, monopotassium or monosodium salt. An alternative selection of sulphoperoxyacids satisfy Formula (II), in which Ra is an alkylene group, Rb is an alkyl group and Rc is hydrogen or an alkyl group such that the linear spacing between the sulpho group and the peroxycarboxylic acid group is at least 3 carbons and the total carbon content is from 12 to 24 carbon atoms and M represents an alkali metal. Precursor aromatic carboxylic acids containing a substituent of formula -(C¿5?H10)-CO2H which can thereafter be sulphonated and peroxidised can themselves be made by reacting the corresponding compound comprising an aromatic hydrocarbon, optionally substituted by an electron donating group with caprolactone and aluminium chloride, preferably at a temperature of from 30 to 50 °C.