| 摘要 |
<p>STABILIZED ALKALI METAL PERCARBONATE POWDER BLEACH A powdered sodium percarbonate composition is provided which exhibits significantly improved percarbonate stability during storage. The sodium percarbonate is stabilized by a phosphate containing compound such as sodium tripolyphosphate or sodium orthophosphate. The powdered sodium percarbonate composition is useful as a powder bleach and preferably comprises a separation resistant bleach composition in the form of a plurality of particles, substantially each particle including sodium carbonate, sufficient sodium percarbonate to provide from about 1 to about 6 weight per cent available oxygen, and sufficient of the phosphate containing stabilizer to retard decomposition of the percarbonate.</p> |
