Compositions having pH-dependent viscosity, thickener systems containing the same, and uses therefor

US7956013B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Ulrich Steinbrenner · Kohlhof, DE
• Günter Oetter · Bischofswerda, DE
• Uwe Ossmer · Neustadt, DE
• Marcus Guzmann · Bad Windsheim, DE

Key dates

• Filing date: Nov 29, 2007
• Grant date: Jun 7, 2011
• Expiry date: Dec 8, 2027

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D1/72
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Compositions comprising: (A) at least one surfactant of the general formula (I)(R1—[(O—(CH2)2)x1(O—CH(CH3)CH2)x2]O)kP(═O)(OH)3-k  (I)wherein the sequence of the alkyleneoxy units is arbitrary, each R1 independently represents a moiety selected from the group consisting of linear and branched C12-C22-alkyl, C12-C22-alkenyl, C12-C22-alkynyl, (C11-C21-alkyl)carbonyl, (C11-C21-alkenyl)carbonyl and (C11-C21-alkynyl)carbonyl, k represents 1 or 2 and x1 and x2 each independently represent an integer of 0 to 20, the sum of x1 and x2 being a number of 1 to 20; and (B) at least one thickener comprising at least two hydrophobic groups R2 which are linked to one another via a bridging hydrophilic group (α), wherein each R2, independently represents a moiety selected from the group consisting of C8-C32-alkyl, C8-C32-alkenyl, C8-C32-alkynyl, cycloalkyl, aryl, and aryl-C1-C32-alkyl, which in each case may have up to 3 hydroxyl substituents; wherein the composition has a pH which is viscosity-dependent.