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US 2013/0059765 A1Published application
Bleaching agent particles comprising sodium percarbonate and a bleach activator
AssigneeEvonik Degussa GmbH
InventorsStefan Leininger, Harald Jakob, Ralph Overdick
Life of this patent
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Abstract
Bleach particles with a core of sodium percarbonate, an inner coating layer with at least 50% by weight of sodium sulfate in the form of thenardite or burkeite and an outer coating layer comprising a water-soluble binder and a perhydrolyzable N-acyl compound or O-acyl compound as bleach activator are storage-stable, are suitable for silo storage and can be transported and handled safely even in a hot and humid climate.
Claims21
1-17. (canceled)
A bleach particle comprising:
- a) a core consisting essentially of sodium percarbonate,
- b) an inner coating layer comprising at least 50% by weight of sodium sulfate in the form of thenardite or burkeite, and
- c) an outer coating layer comprising a water-soluble binder and at least one bleach activator selected from the group consisting of perhydrolyzable N-acyl compounds and O-acyl compounds.
Dependencies are inferred from the claim text.