Enhanced peroxygen stability using fatty acid in bleach activating agent containing peroxygen solid

A stabilized activated bleach solid block composition comprising:

• from about 50-90 wt-% of a solid active oxygen source;
• from about 10-45 wt-% of a bleach activating agent;
• and
• from about 0.1-10 wt-% of a C6-C18 fatty acid binding system,
• wherein the solid composition has less than 0.5 wt-% water and provides shelf stability at room temperature for at least one year.

A method of stabilizing a solid block composition comprising:

• providing a binding system to form a stable solid composition;
• wherein the binding system comprises a C6-C18 fatty acid;
• wherein the stable solid composition comprises the binding system, at least 50 wt-% of a solid active oxygen source, and a bleach activating agent, wherein the ratio of the active oxygen source to the bleach activating agent is between about 1:1 to about 2.5:1, and wherein the solid composition has less than about 1 wt-% water;
• and
• wherein the solid composition retains at least 80% available oxygen and 80% available bleach active generated by the reaction of the active oxygen source and the bleach activating agent after 4 weeks at 100° F.