Process for producing paraffin-containing foam regulators

US6200498A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Rene-Andres Artiga Gonzalez · Goldkronach, DE
• Maria Liphard · Essen, DE
• Ingrid Kraus · Goldkronach, DE
• Stefan Hammelstein · Dressendorf, DE

Key dates

• Filing date: Apr 7, 1999
• Grant date: Mar 13, 2001
• Expiry date: Apr 7, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D3/0026
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for producing pourable foam regulator granules containing a defoamer combination of a paraffin wax and a bisamide derived from diamines and carboxylic acids and an inorganic, water-soluble or water-dispersible carrier salt by pelletizing in a granulation mixer with intensive mixing 50 to 100 parts by weight of the inorganic carrier salt optionally with up to 5 parts by weight of an anionic or nonionic cellulose ether, adding 1 to 10 parts by weight of an aqueous alkali metal silicate or polymeric polycarboxylate solution and then adding 10 parts by weight of the defoamer combination heated to a temperature of 70.degree. C. to 180.degree. C.