Abstract: De-icing compositions, such as used on aircraft wing surfaces, are found to not need thickeners to obtain acceptable holdover times. The compositions are based on an alkylene glycol component (such as propylene glycol, diethylene glycol and mixtures thereof), and obtain particular advantage when a nonionic alkylphenol ethoxylate surfactant is used in conjunction with an alkylaryl sulfonate hydrotrope, as additives. This latter combination of additives gives de-icing compositions with increased holdover times with no degradation of other properties. These compositions exhibit a Newtonian rheology as required for de-icing compositions.

Abstract: The removal of basic alkaline earth metal catalysts from alcohol alkoxylate product streams using acid days wetted with water is described. The catalyst level may be reduced to 1 ppm or less in many instances. Effective acid days include, but are not limited to silica days, silica magnesia clays, alumina, montmorillonite days, mixtures thereof and the like. Contacting of the day with the alcohol alkoxylate may take place at ambient to 120.degree. C.

Abstract: 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. The two polymers form a thickener blend. The polyacrylic acid may have a weight average molecular weight of from about 2,500,000 to about 3,500,000 and be slightly crosslinked with a diene monomer. The composition 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 pseudo plastic rheology indicating desirable flow off characteristics. A neutralizing agent to neutralize at least partially the carboxylic acid groups of the thickening blend is also preferably included.

Abstract: Cyclic and acyclic hydroxyethyl ethylenepolyamines are converted to triethylenediamine when using a catalyst composed of zirconia or titania to which from about 0.5 to about 7 wt. % of phosphorous has been thermally chemically bonded in the form of phosphate linkages.

Abstract: N-(3-dimethylaminopropyl)methacrylamide is prepared by the non-catalytic pyrolysis of N-(3-dimethylaminopropyl)-3-dimethylaminopropyl-2-methyl propionamide in a closed reactor. The N-(3-dimethylaminopropyl)methacrylamide is not removed from the reaction mixture until the pyrolysis reaction is completed.