Aircraft deicing/anti-icing universal fluids

Details Aircraft deicing/anti-icing universal fluids Aircraft deicing/anti-icing universal fluids

C - Chemistry, Metallurgy

09

K

C09K 3/18 (2006.01) C08F 8/44 (2006.01)

Patent

CA 2198296

A glycol- and/or glycerin-based "universal" aircraft fluid (i.e., usable as any of Type I, II, III, or IV fluids), and having good resistance to degradation of viscosity and other critical properties caused by exposure to heat and/or shear, is disclosed. The fluid may optionally be prepared as a concentrate, and thereafter significantly diluted in the field for diverse uses. The improved performance is achieved by neutralizing a latex of a hydrophobe-containing, polymeric thickener with a base, preferably an alkali metal hydroxide, and preferably in combination with a weak base, such as a salt of a weak acid, and a surfactant which associates with the thickener.

On divulgue un liquide d'aéronef « universel » (c.-à-d. utilisable comme n'importe quel liquide des Types I, II, III ou IV) à base de glycol et/ou de glycérine, et ayant une bonne résistance à la dégradation de la viscosité et autres propriétés critiques causées par l'exposition à la chaleur et/ou au cisaillement du vent. Le liquide peut facultativement être préparé sous forme de concentré que l'on peut ensuite diluer considérablement sur le terrain pour diverses utilisations. Le rendement amélioré est obtenu grâce à la neutralisation d'un latex d'un agent épaississant polymérique contenant des hydrophobes avec une base, de préférence un hydroxyde de métal alcalin, et de préférence en combinaison avec une base faible, comme un sel d'un acide faible, et un surfactant qui se lie à l'agent épaississant.

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