Method of preparing a dry blended laundry detergent containing coarse granular silicate particles

US4265790A · kind A · utility

Assignee

• Church & Dwight Co., Inc. · US

Inventors

• Anthony E. Winston · East Brunswick Township, US
• Francis R. Cala · Voorhees, US
• Stephen P. Lengyel · Bound Brook, US
• Lawrence Kirschner · Flanders, US
• Dragomir M. Bracilovic · Princeton, US

Key dates

• Filing date: Aug 9, 1979
• Grant date: May 5, 1981
• Expiry date: Aug 9, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D3/08
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Dry blended carbonate or phosphate-based laundry detergents are prepared by adding to unhydrated or partially hydrated builder salts, a pH buffering compound and a detergent active compound, together with other formulating agents, coarse, hydrous granular water soluble silicate particles, the silicate particles passing a 10 mesh screen and about 95% of the particles are retained on a 100 mesh screen, according to the disclosed method. Dry blended laundry detergents so formulated are substantially completely free of insoluble product lumps when used in cold wash water in the temperature range of 35.degree.-75.degree. F.