Water-activated, exothermic chemical deicing formulations

C - Chemistry – Metallurgy – 09 – K

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C09K 3/18 (2006.01) E01H 10/00 (2006.01) B64D 15/10 (2006.01)

Patent

CA 2482753

Deicing compositions are provided for removing ice from a surface which include either succinic acid or succinic anhydride, or both, and a neutralizing base such as sodium hydroxide, potassium hydroxide, or ammonium hydroxide wherein the deicing compositions when mixed with water produce succinate salts in a reaction that rapidly releases sufficient heat to melt the ice on the surface and the succinate salts act as a deicer and freezing point depressant. In particular embodiments, the deicing compositions further include a glycol which inhibits reformation of the ice on the deiced surface. The deicing compositions are suitable and effective for airport applications in which corrosion of aircraft alloys and concrete runways are of concern.

L'invention concerne des compositions de dégivrage permettant de supprimer la glace d'une surface. Ces compositions comprennent soit de l'acide succinique ou un anhydre succinique, ou les deux, et une base neutralisante, notamment de l'hydroxyde de sodium, de l'hydroxyde de potassium, ou de l'hydroxyde d'ammonium. Lorsque ces compositions de dégivrage sont mélangées à de l'eau, elles produisent des sels de succinate, dans une réaction libérant rapidement suffisamment de chaleur pour faire fondre la glace située sur ladite surface, et les sels de succinate agissent en tant que dégivrant et qu'agent déprimant de point de congélation. En particulier, des modes de réalisation de l'invention concernent des compositions de dégivrage comprenant également un glycol permettant d'éviter que la glace ne se forme de nouveau sur la surface dégivrée. Ces compositions de dégivrage sont appropriées et efficaces pour des applications destinées à des aéroports où la corrosion des alliages des avions et des pistes d'atterrissage en béton posent problème.

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