Peroxygen release compositions and method for producing them

Abstract

Stabilized peroxygen containing compositions are disclosed, both in thickened viscous form and in dry form. The compositions contain newly synthesized calcium sulfate crystals that function as a thickener and stabilizing agent against metal-catalyzed decomposition. The invention discloses a composition comprising 0.5 wt % to 50% wt of hydrogen peroxide. 2.0 wt % to 80.0% wt of newly synthesized calcium sulfate crystals, being of individual sheet or needle shape, and water, said composition having a viscosity of 200 cP to 20,000 cP. The invention further provides a process for making same, comprising the reaction of a water soluble calcium containing salt with sulfuric acid or a salt thereof in an aqueous hydrogen peroxide solution at a reaction temperature of up to 80 C in a mixing apparatus, followed by a concentration step in order to thicken into a stable viscous dispersion or paste containing at least 2 wt % and preferably 10 wt % to 15 wt % of CaSO4. The compositions are suitable for use as disinfectants, as cleaning agents, and in a variety of personal care, pharmaceutical, textile bleaching and industrial applications.

Dependencies are inferred from the claim text.