Phosphate-free detergent builders

US5076957A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Manfred Diehl · Frankfurt am Main, DE
• Wolfgang Leonhardt · Frankfurt, DE
• Gerhard Morlock · Hanau, DE
• Maurizio Ragnetti · Hochheim, DE

Key dates

• Filing date: Feb 6, 1990
• Grant date: Dec 31, 1991
• Expiry date: Feb 6, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D3/3761
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The detergent builder consists of a water-insoluble silicate capable of binding calcium ions as well as of a mixture of two acrylic acid polymerizates which exhibit different viscosity numbers.