De-icing and anti-icing agent for aircraft

Details De-icing and anti-icing agent for aircraft De-icing and anti-icing agent for aircraft

1987-02-04

1988-05-17

Wax, Robert

Compositions

Frost-preventing, ice-thawing, thermostatic, thermophoric,...

106 13, C09K 318

Patent

active

047449136

ABSTRACT:
The new agent, based on glycols and water and having crosslinked acrylic polymers as thickener and also customary corrosion inhibitors, surfactants belonging to the group of alkali metal alkylarylsulfonates and neutralizing agent to adjust the pH to a basic value, contains, as the thickener, two selected crosslinked acrylic polymers in a specific ratio by weight to one another, namely a selected crosslinked acrylic acid or alkali metal acrylate homopolymer and a selected crosslinked acrylic acid/acrylamide or alkali metal acrylate/acrylamide copolymer in a ratio by weight of 2 to 10:1 and, as the neutralizing agent, three alkaline compounds, each in a selected amount, namely ammonia, monoethanolamine, diethanolamine and/or triethanolamine as the first alkaline compound, potassium hydroxide as the second alkaline compound and a further alkali metal hydroxide as the third alkaline compound. The new agent exhibits the particular advantage that it has a relatively low viscosity even at arctic temperatures and low shear rates, which ensures rapid and complete run-off of the agent at the take-off of the aircraft even under extreme conditions.

REFERENCES:
patent: 2798053 (1957-07-01), Brown
patent: 2923692 (1960-02-01), Ackerman et al.
patent: 3940356 (1976-02-01), Byrnes
patent: 4237249 (1980-12-01), Balzer et al.
patent: 4358389 (1982-11-01), Konig-Lumer et al.
patent: 4585571 (1986-04-01), Bloom

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