Basf Aktiengesellschaft

Ashland Licensing and Intellectual Property LLC

Basf Se Corporation

Valvoline Licensing and Intellectual Property LLC

Ladislaus Meszaros

Bernd Wenderoth

Stefan Dambach

Klaus Pfitzner

David E Turcotte

Knut Oppenlander

Arthur H&ouml;hn

Claudius Kormann

Uwe Fidorra

Knut Oppenl&auml;nder

Gefei Wu

Michael Gillich

David F Embaugh

Wolfgang Gunther

Uwe Nitzschke

Marco Bergemann

Wolfgang G&uuml;nther

Jan Nouwen

Michael St&ouml;sser

Juergen Dehler

Hans Schrimpf

Bayram Aydin

Michael Roida

Frank Hillerns

Horst Zöllner

The invention relates to an engine coolant composition, and a method of increasing the operational life of a coolant composition in an engine, wherein an isononanoic acid is incorporated into the generally glycol based coolant fluid in place of nitrous acid or its salt to reduce pitting corrosion on iron containing surfaces, and one or more hydroxybenzoic acids are incorporated.

Extended operation engine coolant composition

The invention relates to an engine coolant composition, and a method of increasing the operational life of a coolant composition in an engine, wherein an isononanoic acid is incorporated into the generally glycol based coolant fluid in place of nitrous acid or its salt to reduce pitting corrosion on iron containing surfaces.

Methods for cooling a fuel cell include providing in a fuel cell coolant system an aqueous fuel cell coolant composition having an initial electrical conductivity of at most 50 &#x3bc;S/cm. The fuel cell coolant compositions include an alkylene glycol and water solution, and an additive consisting of one or more five membered heterocyclic compounds (azole derivatives) having 2 or 3 heteroatoms selected from the group consisting of nitrogen and sulfur, which contain no or at most one sulfur atom and which may carry a fused aromatic or saturated six-membered ring, and an orthosilicate in an amount to provide a silicon content of from 2 to 2000 ppm by weight.

Coolant comprising azole derivatives for cooling systems in fuel-cell drives

An antifreeze concentrate for cooling systems in fuel-cell drives which gives ready-to-use aqueous coolant compositions having a conductivity of at most 50 &#x3bc;S/cm, based on alkylene glycols or derivatives thereof and containing one or more five-membered heterocyclic compounds (azole derivatives) having 2 or 3 hetero atoms from the group consisting of nitrogen and sulfur, which contain no or at most one sulfur atom and which may carry a fused aromatic or saturated six-membered ring.

The invention relates to antifreeze concentrates for cooling systems in fuel cell drives, from which are produced ready-to-use aqueous cooling agent compositions having a maximum conductivity of 50 &#x3bc;s/cm, based on alkylene glycols or the derivatives thereof, and containing orthosilicic acid esters of formula (I) wherein the variables Rto Rare the same or different and represent C-Calkyl substituents, C-Calkenyl substituents, C-Chydroxyalkyl substituents, optionally substituted C-Caryl substituents and/or glycol ether substituents of formula (CH&#x2014;CH&#x2014;O)&#x2014;Rwherein Rrepresents hydrogen or C-Calkyl and n represents a number between 1 and 5 

Cooling agents for cooling systems in fuel cell drives

Cooling agents for cooling systems in fuel cell drives containing azole derivatives

Antifreeze concentrates based on alkylene glycols or derivatives thereof or on glycerol, comprising from 0.0005 to 0.1% by weight of the dye C.I. Reactive Violet 5 (Color Index No. 18097), based on the total amount of the concentrate.

Antifreeze concentrate containing the colorant C.I. Reactive Violet 5

Hydraulic fluids, in particular brake fluids for motor vehicles, comprising from 0.01 to 50 wt % of one or more cyclic carboxylates, or cyclic carboxamides, which can carry a linear or branched C -bis C alkyl group on the nitrogen atom.

Hydraulic fluids, containing cyclic carboxylic acid derivatives

Antifreeze concentrates and coolant compositions containing these concentrates for cooling circuits in internal combustion engines

The present invention relates to novel silicate-, borate- and nitrate-free antifreeze concentrates based on alkylene glycols or derivatives thereof which include an inhibitor combination essentially comprising salts of carboxylic acids together with hydrocarbon-triazoles and/or -thiazoles. These antifreeze concentrates are, in particular, entirely free from any salts of inorganic acids as corrosion inhibitors. The invention also relates to ready-to-use aqueous coolant compositions comprising these antifreeze concentrates.

Glycol based antifreeze concentrates inhibited with monocarboxylic acid

Use of quaternized imidazoles as corrosion inhibitors for non-ferrous

Phosphate-containing, glycol-based coolant mixtures which are stable in hard water and are free of nitrites, silicates, amines and borates contain

Phosphate containing coolant mixtures which are stable in hard water

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Mutterstadt, Germany

Ladislaus Meszaros