Glycol-free aqueous antifreeze compositions comprising...

Details Glycol-free aqueous antifreeze compositions comprising... Glycol-free aqueous antifreeze compositions comprising...

C - Chemistry, Metallurgy

09

K

C09K 5/20 (2006.01) C23F 11/08 (2006.01) C23F 11/12 (2006.01)

Patent

CA 2494326

The invention relates to an aqueous anti-freeze agent containing 10 to 50 wt.% of one or several carboxylic acids, preferably aliphatic dicarboxylic acids with 4 to 12 C atoms in the form of the alkali metal ammonium or earth alkali metal salt. The salts are applied preferably in combination with at least one further substance. Anti-freeze agents with a good frost protection, good thermal conductivity and good corrosion protection are obtained.

La présente invention concerne un antigel aqueux contenant 10 à 50 % en poids d'un ou de plusieurs acides dicarboxyliques, de préférence d'acides dicarboxyliques aliphatiques présentant 4 à 12 atomes de carbone sous forme de sel de métaux alcalins, d'ammonium ou de métaux alcalino-terreux. Ces sels sont de préférence utilisés en combinaison avec au moins une autre substance. On obtient ainsi des antigels assurant une bonne protection contre le gel, une haute protection contre la corrosion et présentant une bonne conductivité thermique.

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