| 摘要 |
The incorporation of many percarboxylic acids in household formulations is precluded from by adverse physicochemical properties, such as a propensity to decompose too quickly during storage or explode on impact or when subjected to pressure, though otherwise they would be effective disinfectants and bleaching agents, especially at hand-hot temperatures. The invention provides a stable and effective selection of organic percarboxylic acids which satisfy one or other of the general formulae (1) or (2): Ra-CO-NH-C6H4-CO-OOH (1) or HOO-CO-Rb-CO-NH-C6H4X (2) in which in formula (1) the amido substituent is meta or para to the percarboxylic acid group and Ra represents an alkyl group containing from 1 to 5 carbons in formula (1) and in formula (2) Rb represents a branched or preferably linear alkylene group containing from 4 to 7 carbon atoms of which at least 4 are linear and X represents hydrogen or a substituent like chloride. In particularly preferred peracids satisfying formula (1), Ra represents an ethyl or n-propyl or n-butyl group para to the percarboxylic acid substituent and in those satisfying formula (2), Rb represents a linear tetra- or penta-methylene group. The invention also provides bleaching, washing and disinfecting compositions containing such peracids and processes using them for such purposes.
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