Basf Corporation

Ashland, Inc.

James T Lyon

John J Conville

David E Turcotte

Stanley T Hirozawa

Daniel E Coker

Shrikant V DeSai

Stephen M Zeld

Richard J Holland

Shrikant V Desai

Robert Chwalik

Turcotte

The present invention provides aqueous concentrated corrosion inhibition formulations suitable for addition to depleted antifreeze/coolant compositions or corrosive water that use a mixture of polymeric polycarboxylates, azoles, nitrate salts, phosphates, stabilized silicates and transition metal compounds which reduces the corrosion rate and is effective at relatively low concentrations. The formulations are particularly suitable for automotive applications.

Aqueous corrosion inhibitor formulations

A removal and refill apparatus for use in removing and/or refilling coolant in an automotive cooling system. The automotive cooling system typically includes a radiator, overflow bottle, engine, water pump, and heater core elements. A method for utilizing the coolant removal and refill apparatus utilizing vacuum and pressure is described for use with the removal and refill apparatus.

Engine coolant removal and refill method and device

In an automotive cooling system made up of a radiator, overflow bottle, engine and heater core members, a method of removing spent antifreeze therefrom involves applying air pressure at the highest vertical point of the cooling system members, and draining the antifreeze via the lowest vertical point thereof. A method of refill via the radiator or pressurized overflow bottle involves utilization of a refill element with vacuum and coolant prongs. Simultaneous vacuum and refill of coolant is achieved with the refill element.

The present invention provides automotive cooling system cleaning formulations suitable for addition to antifreeze/coolant systems. The cleaning compositions use a mixture of a metal cleaning compound such as EDTA, polymeric polycarboxylates and alkoxylated alcohol based nonionic surfactants to provide rapid cleaning of the coolant system. The cleaning formulation is then removed from the cooling system.

Rapid cooling system cleaning formulations

The present invention provides an antifreeze/coolant composition with polymeric polycarboxylates which prevents hard water precipitants and scale formation, is soluble in alcohol and alcohol/water mixtures, is compatible with other commonly used antifreeze/coolant components, does not corrode or damage automotive cooling systems and is effective at relatively low concentrations.

Glycol-based polycarboxylate-containing antifreeze coolant formulations

The present invention provides an antifreeze/coolant additive comprising polymeric polycarboxylates which reduces the corrosion rate of heat rejecting aluminum, and is effective at relatively low concentrations.

Polycarboxylate-containing antifreeze/coolant additive for reducing

The present invention provides an antifreeze/coolant composition with polymeric polycarboxylates which reduces the corrosion rate of heat rejecting aluminum, and is effective at relatively low concentrations.

Glycol-based polycarboxylate-containing antifreeze/coolant formulations

The present invention provides an antifreeze/coolant additive comprising polymeric polycarboxylates which resists cavitation erosion-corrosion of aluminum and aluminum alloys, is effective at relatively low concentrations and at varying pH.

Polycarboxylate-containing antifreeze/coolant additive for resisting

The present invention provides an antifreeze/coolant additive comprising polymeric polycarboxylates which prevents hard water precipitants and scale formation, is soluble in alcohol and alcohol/water mixtures, is compatible with other commonly used antifreeze/coolant components, does not corrode or damage automotive cooling systems and is effective at relatively low concentrations.

Polycarboxylate-containing antifreeze/coolant additive for use in hard

The present invention provides an antifreeze/coolant composition with polymeric polycarboxylates which resists cavitation erosion-corrosion of aluminum and aluminum alloys, is effective at relatively low concentrations and at varying pH.

Cooling system cleaning solutions containing an EDTA salt, a polyhydroxy mono- or dicarboxylic sugar acid, and a soluble nitrate salt are effective in removing scale, corrosion, and solder bloom from cooling systems.

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Novi, MI, United States of America

James T Lyon