C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 3/18 (2006.01)
Patent
CA 2086037
ANTI-ICING COMPOSITIONS HAVING ALKYLPHENOL ETHOXYLATE NONIONIC SURFACTANT AND ALKYLARYL SULFONATE HYDROTROPE (D#81,192-F) Abstract of the Disclosure Anti-icing compositions, such as used on aircraft wing surfaces, may be thickened using a blend of a polyacrylic acid and a copolymer of polyacrylic acid with a vinyl monomer, where the copolymer acts as a thickener modifier. Additional advantages are obtained when a low molecular weight nonionic alkylphenol ethoxylate surfactant is used in conjunction with an alkylaryl sulfonate hydrotrope, as additives. This latter combination of additives gives anti-icing compositions with increased holdover times with no degradation of other properties. The compositions also contain an alkylene glycol component, such as propylene glycol, diethylene glycol and mixtures thereof. These compositions retain a high viscosity, even when diluted with water, and exhibit a highly pseudoplastic rheology indicating desirable flow off characteristics.
Ashrawi Samir S.
Coffey David A.
Smart & Biggar
Texaco Development Corporation
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