Patent ID: 6802988
Filing Date: 2004-10-12
Classification: C09K,C23F

Abstract:
An antifreeze concentrate comprising one or more alkylene glycols or one or more derivatives thereof, and(a) from 0.05 to 10% by weight, based on the total weight of the concentrate, of a mixture of at least two different dicarboxylic acids each having from 3 to 16 carbon atoms in the form of their alkali metal salts, ammonium salts, substituted ammonium salts, or, in the case of saturated aliphatic dicarboxylic acids having from 3 to 16 carbon atoms, their imides, (b) from 0.01 to 5% by weight, based on the total weight of the concentrate, of one or more alkali metal molybdates, ammonium molybdates or substituted ammonium molybdates, and (c) from 0.01 to 3% by weight, based on the total weight of the concentrate, of a mixture of at least two different corrosion inhibitors selected from the group consisting of hydrocarbon triazoles and hydrocarbon thiazoles.