ANTI-LONG CONCENTRATES AND REFRIGERANT COMPOSITIONS BASED ON POLYGLYCOLS AND AMIDES FOR THE PROTECTION OF MAGNESIUM AND ITS ALLOYS.

摘要

Concentrates of antifreeze agents based on alkylene glycols, glycerin and / or 1,3-propanediol, containing a) 0.05 to 10% by weight, based on the total amount of concentrate, of one or more polyethylene- and / or polypropylene glycols selected from triethylene glycol, tetraethylene glycol, pentaethylene glycol, hexaethylene glycol, tripropylene glycol, tetrapropylene glycol, pentapropylene glycol, hexapropylene glycol, and mixtures thereof, b) 0.01 to 10% by weight, based on the amount thereof or several carboxylic acid amides and / or sulfonic acid amides, the amide group of the sulfonic acid amides being not substituted with alkyl, c) 0.05 to 10% by weight, based on the amount total concentrate of one or more aliphatic, cycloaliphatic or aromatic amines with 2 to 15 carbon atoms, which may additionally contain ether oxygen atoms or hydroxyl groups and d) 0.05 to 10% by weight, referred to the total amount of concentrate, of one or more heterocycles of one or two nuclei, unsaturated or partially unsaturated, with 4 to 10 carbon atoms, which may be benzocondensed, and carry additional functional groups.