초록 ▼

The present invention describes an aqueous, non-electrolytic, non-toxic, biodegradable, continuous single phase liquid anti-icing or deicing composition for use on the surfaces of, for example, aircraft, airport pavements, roadways, walkways, bridges, entrances, structures, canals, locks, components

The present invention describes an aqueous, non-electrolytic, non-toxic, biodegradable, continuous single phase liquid anti-icing or deicing composition for use on the surfaces of, for example, aircraft, airport pavements, roadways, walkways, bridges, entrances, structures, canals, locks, components, vessels, nautical components, railroad switches, and motor vehicles. The anti-icing or deicing composition comprises: (a) water; (b) a non-toxic freezing point depressant selected from the group consisting of monohydric alcohols having from 2 to 6 carbon atoms, polyhydric alcohols having from 3 to 12 carbon atoms, monomethyl or ethyl ethers of polyhydric alcohols having from 3 to 12 atoms or mixtures thereof, wherein the freezing point depressant present is between about 14 to 60 percent by weight; (c) a thickener which is present in between about 0.01 and 10 percent by weight; and (d) optionally a corrosion inhibitor which is present in between about 0.01 and 0.1 percent by weight of the total composition. In one embodiment, the deicing composition further includes (e) a monohydric primary aliphatic unbranched alcohol as a means of forming a thin layer of the composition on the surface of the structure to be given ice protection, and/or as means of forming a homogenized foam with xanthan thickener; which alcohol is selected from the group consisting of alcohols having between 8 to 24 carbon atoms, preferably, 1-dodecanol. Compositions of water, propylene glycol, and/or propanol and xanthan are preferred.

대표청구항 ▼

[ We claim:] [1.] An environmentally-friendly anti-icing or deicing composition, said composition comprises:(a) water in between about 40 and 86 percent by weight of the combined weight of water and freezing point depressant;(b) at least one non-toxic, water soluble, freezing point depressant select

[ We claim:] [1.] An environmentally-friendly anti-icing or deicing composition, said composition comprises:(a) water in between about 40 and 86 percent by weight of the combined weight of water and freezing point depressant;(b) at least one non-toxic, water soluble, freezing point depressant selected from the group consisting of monohydric alcohols having from 2 to 6 carbon atoms, polyhydric alcohols having from 3 to 12 carbon atoms, monomethyl or monoethyl ethers of polyhydric alcohols having from 3 to 12 carbon atoms, and mixtures thereof wherein the amount of said freezing point depressant is between about 14 and 60 percent by weight of said combined water and freezing point depressant weights; and(c) a non-toxic thickener which is present in an amount between about 0.01 and 10 percent by weight of the total composition, said thickener is a xanthan which when combined with (a) and (b) provides a continuous liquid composition, wherein said liquid composition is a homogeneous, continuous single phase, and said liquid composition when formed has a high near-static initial viscosity above about 20,000 cPs when measured using a viscosity measuring device, and the formed liquid after being subjected to at least one external dynamic strain at a rate of at least 20 sec.sup.-1 for at least 1.0 min., has a second, lower viscosity below about 1,000 cPs as measured using said viscosity measuring device, and upon removal of said external dynamic strain rate, within 10 min., said liquid composition has a third viscosity of within about 99.5% of said initial viscosity when said third viscosity is measured on said viscosity measuring device, with the proviso that the composition does not include a water insoluble liquid and with the proviso that the composition is not an emulsion.