Stabilized alkali metal percarbonate powder bleach

Compositions – Electrolytes for electrical devices

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Details

252135, 252186, 8111, 427213, 427215, 423415P, 23313R, 23313FB, C11D 754

Patent

active

042605083

ABSTRACT:
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 percent available oxygen, and sufficient of the phosphate containing stabilizer to retard decomposition of the percarbonate.

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patent: 4171280 (1979-10-01), Maddox et al.
patent: 4179394 (1979-12-01), Dillenburg et al.

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