C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 5/20 (2006.01) C09K 15/06 (2006.01) C09K 15/12 (2006.01) C09K 15/30 (2006.01) C23F 11/10 (2006.01) C23F 11/16 (2006.01)
Patent
CA 2336644
The invention relates to antifreeze concentrates which are characterized in that they a) comprise at least one alcohol which can be mixed with water and which lowers the freezing point; b) at least one corrosion inhibitor; and c) at least one mononuclear or polynuclear aromatic component which carries at least one hydroxyl group, has a high buffering capacity in the pH range of approximately 6 to 10, and which is used as a reserve alkalinity dispenser. The invention also relates to coolant compositions containing these antifreeze concentrates for cooling circuits in internal combustion engines.
L'invention concerne des antigels concentrés, qui se caractérisent en ce qu'ils comprennent: a) au moins un alcool miscible à de l'eau, qui abaisse le point de congélation; b) au moins un inhibiteur de corrosion; et c) comme dispensateur d'alcalinité de réserve, au moins un composé aromatique mono- ou polycyclique, portant au moins un groupe hydroxyle et à forte capacité tampon dans la plage de pH comprise entre 6 et 10. L'invention concerne également des compositions réfrigérantes les contenant, pour les circuits de refroidissement de moteurs à combustion interne.
Gillich Michael
Gunther Wolfgang
Meszaros Ladislaus
Oppenlander Knut
Pfitzner Klaus
Basf Aktiengesellschaft
Borden Ladner Gervais Llp
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