| US 7,588,697 B2 | ||
| Coated sodium percarbonate granules with improved storage stability | ||
| Klaus Zimmermann, Rodenbach (Germany); Jürgen Lattich, Nidderau (Germany); and Harald Jakob, Hasselroth (Germany) | ||
| Assigned to Evonik Degussa GmbH, Essen (Germany) | ||
| Appl. No. 10/555,546 PCT Filed Apr. 24, 2004, PCT No. PCT/EP2004/004355 § 371(c)(1), (2), (4) Date Nov. 04, 2005, PCT Pub. No. WO2004/099071, PCT Pub. Date Nov. 18, 2004. |
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| Claims priority of application No. 03010225 (EP), filed on May 07, 2003. | ||
| Prior Publication US 2006/0249707 A1, Nov. 09, 2006 | ||
| Int. Cl. C01B 15/10 (2006.01); C11D 3/39 (2006.01) | ||
| U.S. Cl. 252—186.27 [252/186.25; 252/186.43; 423/425.2; 510/309; 510/367] | 25 Claims |
| 1. A coated sodium percarbonate granule with improved storage stability, comprising:
a) a core produced by fluidised bed spray granulation comprising sodium percarbonate as its main component;
b) an inner coating layer comprising an inorganic hydrate-forming salt as its main component; and
c) an outer coating layer comprising as its main component at least one surfactant, wherein said surfactant comprises one
or more sulfate or sulfonate groups in the form of an alkali metal, alkaline-earth metal or ammonium salt.
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