Heat transfer fluids and corrosion inhibitor formulations for use thereof
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United States of America Patent
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Sep 27, 2016
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app pub date -
Sep 10, 2015
filing date -
Sep 7, 2012
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Abstract
Disclosed herein is a heat transfer fluid concentrate comprising: greater than or equal to 90 weight percent of a freezing point depressant; 16 to 80 ppm of magnesium ions; an azole compound; an inorganic phosphate; a carboxylate; and an acrylate based polymer, wherein the heat transfer fluid concentrate has a pH of 7-9.5 and the weight ratio of acrylate based polymer to magnesium ions is 1 to 25. The heat transfer fluid concentrate can be used to make a heat transfer fluid.
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