Majestic, Parsons, Siebert & Hsue P.C.
Liquid coolant compositions with anti-corrosive property containing magnesium and calcium compounds
 A liquid coolant composition with improved anti-corrosive property contains 85-99 weight % of an agent for lowering the melting point selected from the group consisting of alcohols and glycol, and 1-15 weight % of a rust preventive composition. The rust preventive composition contains 0.00005-0.02 weight % at elemental metal concentration of calcium compounds or a mixture of 0.00005-0.02 weight % each of calcium and magnesium compounds, and at least one kind of rust preventive selected from the group consisting of phosphates, borates, nitrates, molybdates, benzoates, silicates, triazoles, thiazoles, sebacic acid and octylic acid. Still better results are obtained if 0.001-0.02 weight % of at least one kind of polyphosphoric or polycarboxylic acids is additionally contained. 
Japan Chemical Industries Co., Ltd.
C C
C23F C09K
inventional inventional
Kazuhito Hideyuki Hisaki Masamine Yoshitaka
Yaeda Tami Ito Tanikawa Nakatani