The present invention relates to diaminotriazine compounds of the formula (I) and to their use as herbicides. The present invention also relates to agrochemical compositions for crop protection and to a method for controlling unwanted vegetation. Formula (I), wherein A is 5- or 6-membered monocyclic heteroaryl, which comprises 1, 2 or 3 heteroatoms as ring members, which are selected from O, S and N, where heteroaryl is substituted by 1, 2, 3, 4, or 4 substituents RA, R1, R5 are inter alia H, OH, S(O)2NH2, CN, C1-C6-alkyl, C2-C6-alkenyl, C2-C6- alkynyl, (C3-C6-cycloalkyl)-C1-C4-alkyl, C1-C6-alkoxy, (C1-C6-alkoxy)-C1-C6-alkyl, (C1-C6-alkyl)-carbonyl, (C1-C6-alkoxy)carbonyl, (C1-C6-alkyl)sulfonyl, (C1-C6- alkylamino)carbonyl, di(C1-C6-alkyl)aminocarbonyl, (C1-C6-alkylamino)sulfonyl, di(C1-C6-alkyl)aminosulfonyl and (C1-C6-alkoxy)sulfonyl, etc. R2 is H, halogen, OH, CN, C1-C6-alkyl, C2-C6-alkenyl, C3-C6-alkynyl, (C1-C6-alkoxy)- C1-C6-alkyl, C3-C6-cycloalkyl, C3-C6-cycloalkenyl, (C3-C6-cycloalkyl)-C1-C4-alkyl, C1-C6-alkoxy, C2-C6-alkenyloxy, C2-C6-alkynyloxy, C3-C6-cycloalkoxy or (C3-C6- cycloalkyl)-C1-C4-alkoxy, where the aliphatic and cycloaliphatic parts of the 9 aforementioned radicals are unsubstituted, partly or completely halogenated； R3 is selected from the group consisting of H, halogen, CN, C1-C6-alkyl, C1-C6- haloalkyl, C1-C6-alkoxy and C1-C6-haloalkoxy； R4 is selected from the group consisting of H, halogen, CN, C1-C6-alkyl, C2-C6- alkenyl, C3-C6-alkynyl, C3-C6-cycloalkyl, (C3-C6-cycloalkyl)-C1-C4-alkyl, C3-C6- cycloalkenyl and C1-C6-alkoxy-C1-C6-alkyl, where the aliphatic and cycloaliphatic parts of the 7 aforementioned radicals are unsubstituted, partly or completely halogenated； or R3 and R4 together with the carbon atom to which they are attached form a moiety selected from the group consisting of carbonyl, C2-C6-alkenyl, C3-C6-cycloalkyl, C3-C6-cycloalkenyl and three- to six-membered heterocyclyl, including their agriculturally acceptable salts.La prése
