Substituted 1-phenyl-2,5-dioxo imidazolidines

Claim 1

1-Phenyl-2,5-dioxo-imidazolidines according to claim 1, wherein X represents a fluorine, chlorine, bromine or iodine atom, the cyano group, an alkyl or alkoxy radical each containing from one to three carbon atoms, the trifluoromethyl, a methylsulphonyl or a dimethylsulphamoyl radical, n is 0 or an integer from 1 to 3, R represents the methyl group, and R1 represents a chlorine atom, the hydroxyl group, the amino group, or an alkylamino, alkenylamino, dialkylamino, alkylcarbamoyloxy or dialkylcarbamoyloxy group containing at most three carbon atoms in the respective alkyl radicals, or an optionally chlorinated acetoxy radical or an O,O-bis(alkyl)dithiophosphoryl group containing in each case at most 4 carbon atoms in the aliphatic chain.