Alkali-stable foam inhibitors

US5205959A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Karl Schmid · Mettmann, DE
• Karin Koren
• Detlev Stanislowski · Mettmann, DE
• Michael Langen · Aachen, DE

Key dates

• Filing date: Feb 25, 1992
• Grant date: Apr 27, 1993
• Expiry date: Feb 25, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D3/3418
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A foam-inhibiting aqueous concentrate, stable in alkaline compositions, contains PA0 (a) about 5 to about 30% by weight of alkyl glucoside based on C.sub.6 -C.sub.12 fatty alcohols having a degree of glucosidation of about 1 to about 2, PA0 (b) about 5 to about 70% by weight of end-capped polyethylene glycol ether compound corresponding to formula I EQU R.sub.1 O--(CH.sub.2 CH.sub.2 O).sub.n --R.sub.2 (I) PA0 wherein the radical R.sub.1 O is derived from 2-branched, even-numbered alkanols containing from 16 to 20 carbon atoms, R.sub.2 is an alkyl radical containing 4 to 8 carbon atoms, and n is a number of about 5 to about 9, PA0 (c) about 5 to about 70% by weight of non-end-capped polyethylene glycol ether compound corresponding to formula II EQU R.sub.5 O--(CH.sub.2 CH.sub.2 O).sub.2 --H (II) PA0 wherein the radical R.sub.5 O is derived from 2-branched even-numbered alkanols containing from 12 to 20 carbon atoms, and z is a number of about 2 to about 5.