Thickened compositions

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A - Human Necessities

01

N

A01N 37/16 (2006.01) A01N 59/00 (2006.01) A61L 2/18 (2006.01)

Patent

CA 2102597

2102597 9219287 PCTABS00017 Many aqueous compositions containing a peroxygen compound have a very low viscosity and thus easily run off non-horizontal surfaces. Particularly when the peroxygen compound is a soluble peracid, the compositions are difficult to thicken successfully, because many commonly available thickening systems for aqueous media either fail to thicken them or are decomposed and/or decompose the peroxygen compound substantially during storage. The compositions, preferably containing a soluble peracid are thickened with an alkali metal silicate, preferably sodium silicate, such as Na2O.(SiO2)2, suitably in an amount of from about 2 to 6 % of the composition and normally introduced in the form of a concentrated aqueous composition. The compositions may contain additionally an alkylammonium methosulphate. Preferred peracid solutions include dilute equilibrated peracetic acid solutions. The solutions when thickened to form a viscous liquid are suitable for disinfecting hard surfaces and when thickened to form a gel are suitable for suspension in an aqueous medium, for example in block form.

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