Basf Se Corporation

Diana Neumann

Arend Jouke Kingma

Henning Urch

Aqueous formulations comprising (A) at least one organic complexing agent selected from (A1) alkali metal salts of aminopolycarboxylic acids and (A2) polymers bearing at least two &#x2014;CH&#x2014;N(CHCOOH)-units per molecule, partially or fully neutralized with alkali, (B) at least one salt of at least one of the following acids: nitric acid, sulphuric acid, sulphamic acid, methanesulfonic acid, C-C-carboxylic acids, C-C-hydroxymonocarboxylic acids, C-C-dicarboxylic acids, unsubstituted or substituted with hydroxyl, and C-C-tricarboxylic acids, each unsubstituted or substituted with hydroxyl, (C) at least one compound selected from (C1) phosphoric acid C-C-monoalkyl esters, (C2) a C-C-alkynol, optionally alkoxylated with one to 10 alkoxide groups per hydroxyl group, and (C3) a C-C-alkynediol, optionally alkoxylated with one to 10 alkoxide groups per hydroxyl group, said aqueous formulations having pH values in the range of from 7.5 to 10.

Aqueous formulations with good storage capabilities

The object of the present invention relates to the use of an branched alkoxylated non-ionic surfactant as an additive to an aqueous membrane cleaning composition, wherein the surfactant has an HLBvalue of 9 to 12.5 and an average degree of branching B&#x2265;1.5 and wherein the surfactant has the following formula: wherein

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Speyer, Germany

Diana Neumann