Patent ID: 6254801
Filing Date: 2001-07-03
Classification: A01N,C02F,C07C

Abstract:
A storage-stable hardness-stablizing percarboxylic acid solution comprising:1 to 15 wt. % of one or more percarboxylic acids selected from the group consisting of performic acid and peracetic acid,0.1 to 15 wt. % of one or more acids selected from the group consisting of acetic acid and formic acid,20 to 50 wt. % of hydrogen peroxide,0.1 to 10 wt. % of a hardness stabilizer selected from the group consisting of polymers prepared by the oxidative polymerization of acrolein and polymers prepared by the oxidative polymerization of acrolein and acrylic acid,0 to 10 wt. % of one or more additives selected from the group consisting of surfactants, corrosion inhibitors and buffers,0 to 3 wt. % of mineral acid,0 to 1 wt. % of conventional active oxygen stabilizers andat least 40 wt. % water,wherein the hardness-stabilizer is not cross-linked, the average molecular weight Mw of the hardness stabilizer is in the range 500 to 25000, and some carboxyl groups in the hardness stabilizer may have been converted into percarboxyl groups.