Antifreeze coolant composition for high temperature...

C - Chemistry – Metallurgy – 09 – K

Patent

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Details

C09K 5/00 (2006.01) C09K 5/20 (2006.01)

Patent

CA 2507786

The present invention comprises an improved antifreeze coolant composition with certain additives that serve to increase the thermal stability of the glycol component of a glycol/water coolant composition and to reduce the tendency of the glycol component to degrade under elevated thermal conditions. These additives comprise organic compounds with a carboxylic acid moiety and a hydroxyl moiety, and also tricarballylic acid. Another aspect of this invention concerns a method for improving the stability of the glycol component of a glycol/water coolant composition in engine cooling/heating systems by formulating a glycol/water coolant composition with the thermal stability additive to form an improved coolant composition, and contacting the engine cooling/heating system with the improved coolant composition.

La présente invention concerne une composition de liquide de refroidissement améliorée, contenant certains additifs destinés à augmenter la stabilité thermique du composant glycolique d'une composition de liquide de refroidissement de glycol/eau, et à réduire la tendance du composant glycolique à se dégrader dans des conditions thermiques élevées. Ces additifs comprennent des composés organiques contenant un fragment d'acide carboxylique et un fragment d'hydroxy, et de l'acide tricarballylique. Un autre aspect de cette invention concerne un procédé visant à améliorer la stabilité du composant glycolique d'une composition de liquide de refroidissement de glycol/eau dans des systèmes de refroidissement/chauffage de moteur par formulation d'une composition de liquide de refroidissement de glycol/eau avec un additif de stabilité thermique afin d'obtenir une composition de liquide de refroidissement améliorée, et à mettre en contact le système de refroidissement/chauffage de moteur avec la composition de liquide de refroidissement améliorée.

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