C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 5/20 (2006.01) C23F 11/08 (2006.01) C23F 11/10 (2006.01)
Patent
CA 2520246
The invention relates to an antifreeze concentrate based on alkylene glycols, glycerin, and/or 1,3-propanediol. Said antifreeze concentrate contains a) 0.05 to 10 percent by weight, preferably 0.5 to 5 percent by weight, relative to the total quantity of the concentrate of one or several polyethylene glycols and/or polypropylene glycols, and b) 0.01 to 10 percent by weight, preferably 0.05 to 10 percent by weight, relative to the total quantity of the concentrate of one or several carboxylic acid amides and/or sulfonic acid amides. Ready-to-use aqueous coolant compositions containing 30 to 70 percent by weight, especially 40 to 60 percent by weight, of the concentrate can be obtained by diluting the inventive concentrates with water. Said coolant compositions are characterized by effective corrosion inhibition of magnesium and magnesium alloys.
L'invention concerne un concentré d'antigel à base d'alkylèneglycols, de glycérine et/ou de 1,3-propanediol, contenant a) 0,05 à 10 % en poids, de préférence 0,5 à 5 % en poids, par rapport à la quantité totale du concentré, d'un ou de plusieurs polyéthylèneglycols et/ou polypropylèneglycols et b) 0,01 à 10 % en poids, de préférence 0,05 à 10 % en poids, par rapport à la quantité totale du concentré, d'un ou de plusieurs carboxamides et/ou sulfonamides. On obtient, par dilution avec de l'eau des concentrés selon l'invention, des compositions réfrigérantes aqueuses prêtes à l'emploi qui contiennent 30 à 70 % en poids, et notamment 40 à 60 % en poids, du concentré. Ces compositions réfrigérantes se caractérisent par une inhibition efficace de la corrosion pour le magnésium et les alliages de magnésium.
Dambach Stefan
Weiss Gerhard
Wenderoth Bernd
Basf Aktiengesellschaft
Borden Ladner Gervais Llp
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