Aqueous bleaching agent suspensions containing peroxycarboxylic acid, method for their preparation and use

US4879057A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Manfred Dankowski · Karlstein, DE
• Thomas Lieser · Hanau, DE
• Gunter Prescher · Hanau, DE
• Wolfgang Leonhardt · Frankfurt, DE
• Manfred Diehl · Frankfurt am Main, DE

Key dates

• Filing date: Mar 16, 1988
• Grant date: Nov 7, 1989
• Expiry date: Mar 16, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D3/222
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Aqueous bleaching agent suspensions based on a water-soluble peroxycarboxylic acid suspended in a carrier liquid in the presence of an organic thickening agent and of an acidifying agent exhibit an improved storage resistance over known suspensions with this base. This is achieved by means of pourable to pasty bleaching agent suspensions which contain a xanthan polysaccharide or agar polysaccharide as thickening agent and, in addition, a hydrate-forming neutral salt which desensitizes peroxycarboxylic acids. Preferred suspensions exhibit a pH of 2-5 and contain 10-30% by wt. diperoxydodecanedioic acid, 5-20% by wt. sodium sulfate and 0.1-1.0% by wt. xanthan. The use of non-dried, hydrophilized and optionally in situ desensitized peroxycarboxylic acids is especially preferred. The bleaching agent suspensions are prepared by homogeneously suspending the peroxycarboxylic acid in the thickened carrier liquid. The storage-resistant bleaching agent suspensions are used as laundry bleaching agents and for preparing cleaning agents and disinfection agents.