Patent ID: 8591762

Claim:
An aqueous heat transfer medium liquid composition exhibiting enhanced stability as well as thermal conductivity, said composition comprising, in addition to water: (a) at least one type of silica colloid particle, each particle having an average particle diameter in the range of from 0.1 to 1000 nm; (b) at least one type of phosphonate functional siliconate having the following structure; wherein R 1 is a water solubilizing group, R 2 is selected from the group consisting of hydrogen, an alkyl group of from 1 to 3 carbons, and a water-soluble cation, and R 3 is an alkyl group, wherein the water solubilized group R 1 is a functionalized amine of following structure wherein M is hydrogen or a water-soluble cation; and (c) at least one kind of metal corrosion inhibitor.