Polymer-thickened deicing composition and anti-icing composition for aircraft

Claim 1

A polymer-thickened deicing or anti-icing composition, consisting essentially of a) from 35 to 70% by weight of at least one alkylene glycol having 2 to 3 carbon atoms or oxalkylene glycol having 4 to 6 carbon atoms, or a mixture thereof, b) from 0.05 to 1.5% by weight of a water-soluble crosslinked homopolymer of acrylic acid or methacrylic acid, or a mixture of a water-soluble crosslinked homopolymer of acrylic acid and a water-soluble crosslinked homopolymer of methacrylic acid, said homopolymer and said mixture each having a mean molecular weight of from 750,000 to 1,250,000 and a viscosity of from 1000 to 13,000 mPa·s, said viscosity being measured with a Brookfield viscometer at 20 rpm on a 0.5% strength by weight aqueous solution with a pH of 7.0 and a temperature of 20° C., c) from 0.02 to 1.5% by weight of at least one nonionic surfactant comprising an alcohol alkoxylate having 1 to 10 C 2 -C 3 -alkylene oxide units, the alcohol radical of said alcohol alkoxylate having 6 to 22 carbon atoms, d) from 0.03 to 1% by weight of at least one water-soluble salt of an inorganic acid or aromatic or aliphatic carboxylic acid or a mixture thereof, the inorganic acid being boric, hydrohalic, silicic, phosphoric, phosphorous, sulfuric, or nitric, e) from 0.01 to 1% by weight of a corrosion-inhibiting, substituted or unsubstituted imidazole or triazole or a mixture thereof, and f) water as remainder to 100% by weight, percentages by weight being based on the composition.