Thixotropic aqueous compositions containing adipic or azelaic acid stabilizer

US5427707A · kind A · utility

Assignee

• Colgate-Palmolive Company · US

Inventors

• Julien Drapier · Seraing, BE
• Chantal Gallant · Cheratte, BE
• Leo Laitem · Orp-Jauche, BE
• Marta Delsignore · Fort Lee, US
• Makarand Shevade · Plainsboro, US
• Rhyta S. Rounds · Flemington, US
• Divaker Kenkare · Phillipsburg, US
• Thomas Davan · Wantage, US
• Nagaraj S. Dixit · Plainsboro, US

Key dates

• Filing date: Jun 22, 1994
• Grant date: Jun 27, 1995
• Expiry date: Jun 22, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D17/003
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The physical stability of liquid gel-like compositions based on thixotropic thickener is greatly improved by incorporating in the composition small amounts, such as 0.1 to 0.2 weight percent of long chain fatty acids and salts thereof. The aqueous compositions containing inorganic builder salts and other functional inorganic salts, chlorine bleach, bleach stable detergent, at least one thixotropic thickener and a fatty acid or alkali metal salt of the fatty acid as a physical stabilizer exhibit a significant increase in apparent viscosity and remain stable against phase separation for an extended period of time. The thixotropic properties can be retained or improved using smaller levels of the thixotropic thickener than in the absence of the physical stabilizer. The stability, chlorine-bleach loss and cleaning ability of the compositions is further improved, when the composition pH is at least 11.2, when added to an aqueous wash both at a concentration of about 10 grams per liter. Use as liquid gel-like automatic dishwasher compositions are described.