Detergent composition containing an antifoaming agent for cleaning hard surfaces and method of using the same

Claim 1

A detergent composition for the mechanical cleaning of hard surfaces in aqueous alkaline cleaning liquors, which comprises (A) 20 to 95% by weight, of the total weight of the mixture A+B, of a nonionic surfactant of the formula ##STR10## or a mixture of the formulae (A 1 ), (A 2 ) and/or (A 3 ), in which R 1 is an alkyl radical having 6 to 22 C atoms, R 2 is an alkyl radical having 1 to 6 C atoms, R 3 is an alkyl radical having 1 to 4 C atoms, a is a statistical average value within the range from 2 to 10, b is a statistical average value within the range from 1 to 8, c is a statistical average value within the range from 5 to 20 and d is a statistical average value within the range from 0 to 3, and (B) 5 to 80% by weight, of the total weight of the mixture A+B, of a cationic surfactant of the formula ##STR11## in which R 4 and R 5 are identical or different alkyl radicals having 1 to 12 C atoms, R 6 is an alkyl radical having 1 to 8 C atoms and R 7 is an alkyl radical having 1 to 4 C atoms or a benzyl radical, and A denotes an anion, and, additionally, (C) 0.001 to 20% by weight, relative to the total weight A+B=100, of a fluorinated alcohol of the formula ##STR12## in which Rf is a perfluoromethyl or perfluoroisopropyl radical, R 8 is an alkyl radical having 1 to 3 C atoms, R 9 is hydrogen or an alkyl radical having 1 to 3 C atoms, e denotes an integer from 5 to 15, f denotes an integer from 0 to 4 and g assumes the value 0 in the case of f=1 to 4, and assumes the value 1 in the case of f=0.