Patent ID: 6080331
Filing Date: 2000-06-27
Classification: C09K,C23F

Abstract:
A silicate-, borate- and nitrate-free antifreeze concentrate which is based on alkylene glycols or derivatives thereof and consists essentially of:(a) from 0.05 to 10% by weight, based on the total amount of concentrate, of a mixture of two monocarboxylic acids each of 3 to 16 carbon atoms in the form of their alkali metal salts, ammonium salts or substituted ammonium salts, the first acid being an aliphatic monocarboxylic acid, and the second acid being a hydroxy aromatic monocarboxylic acid, selected from the group consisting of o-, m- or p-hydroxybenzoic acid and o-, m- or p-(hydroxymethyl)benzoic acid, and(b) from 0.01 to 3% by weight, based on the total amount of concentrate, of at least one hydrocarbon-triazole and/or hydrocarbon-thiazole.