Foam inhibitors for polymer dispersions

US4981893A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Rainer Hoefer · Goldkronach, DE
• Karl Schmid · Mettmann, DE
• Adolf Asbeck · Goldkronach, DE
• Uwe Held · Velbert, DE

Key dates

• Filing date: Dec 21, 1987
• Grant date: Jan 1, 1991
• Expiry date: Dec 21, 2007

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D19/0404
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Compounds corresponding to the following formula EQU R.sub.1 --(CH.sub.2).sub.m --O--(CH.sub.2 CH.sub.2).sub.n --R.sub.2 in which R.sub.1 is the phenyl radical or a phenyl radical which is substituted by linear or branched alkyl radicals containing a total of from 1 to 18 carbon atoms, R.sub.2 is a C.sub.4 -C.sub.8 alkyl radical, m=0 or 1 and n=3 to 30, are used as dispersants with foam-inhibiting properties in aqueous polymer dispersions and latices.