C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
31/80
C09K 3/18 (2006.01) C09K 5/20 (2006.01)
Patent
CA 2002224
ABSTRACT OF THE DISCLOSURE Novel anti-icer/deicer liquids are prepared by reacting active MgO with aqueous acetic acid containing methanol and/or ethylene glycol. Liquids can be formulated with densities greater than that of water-ice, to ensure rapid melting of ice upon application. Flash points of the methanol-containing liquids are considerably raised above that of straight methanol, due to the high solute content of these liquids. An unexpected feature of these liquids is their dramatic increase in viscosity as temperature is lowered into the practical winter ice- melting zone. This reduced the tendency to spread, with the consequent significantly reduced evaporation of methanol. Higher density and viscosity also promote penetration of the melting front into the ice. A key feature of one class of the novel liquids is the low evaporation rate of methanol therefrom under certain application conditions, due to the protective skin which automatically forms at the liquid/air interface.
Gancy Alan B.
Macrae & Co.
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