AQUEOUS COOLANT FOR THE RUNNING-IN PERIOD OF AN ENGINE CONTAINING AMMONIUM SALTS OF MONOPHTHALIMIDES

摘要

The invention relates to aqueous coolants with corrosion-inhibiting properti es for the wet circuit, in particular for the running-in period of internal combustion engines, after which the coolant is drained off (engine running-i n fluids), which comprise at least one ammonium salt of a monophthalimide of general formula (I), in which Rl and R2 independently or together = H, a linear, branched cyclic or acyclic C1-C 20 alkyl group and A+ = an ammonium cation.