Coated sodium percarbonate particles

US8153576B2 · kind B2 · utility

Assignee

• EVONIK DEGUSSA GMBH · DE

Inventors

• Stefan Leininger · Langenselbold, DE
• Harald Jakob · Hasselroth, DE
• Ralph Overdick · Hofheim, DE

Key dates

• Filing date: Jun 27, 2007
• Grant date: Apr 10, 2012
• Expiry date: Jun 27, 2027

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D17/0039
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Sodium percarbonate particles with a coating layer which comprises from 70 to 99.8% by weight of anhydrous sodium sulfate and from 0.2 to 20% by weight of a sodium borate, and whose proportion by weight is from 1 to 10% based on the mass of the sodium percarbonate particle, exhibit a high storage stability in detergent and cleaning composition formulations through a synergistic effect of sodium sulfate and sodium borate on the storage stability, and at the same time only have a small content of boron.