The present invention relates to diaminotriazine compounds and to their use as herbicides. It also relates to agrochemical compositions for crop protection and to method for controlling unwanted vegetation. Formula (I) wherein p is 1 or 2 q is 0, 1, 2 or 3 provided that p+q is 1, 2, 3 or 4 Q is inter alia a chemical bond, O, S(O)m, CRq1 Rq2, NRq3, C(O), C(O)O, Ar is phenyl, which is unsubstituted or carries 1, 2, 3, 4 or 5 radicals RA, Ra is inter alia hydrogen, halogen, OH, CN, amino, NO2, C1-C6-alkyl, etc Rb is inter alia halogen, OH, CN, amino, NO2, C1-C6-alkyl, etc. R1 and R2 are inter alia H, OH, S(O)2NH2, CN, C1-C6-alkyI, etc X is a radical selected from the group consisting of CR3R4R5, phenyl, which is unsubstituted or carries 1, 2, 3, 4 or 5 radicals RAr NR3aR3b, OR3c, S(O)kR3d, k being 1, 2 or 3 and including their agriculturally acceptable salts.
