Vattable 2-aryl-4,6-diaminopyrimidines

A vattable 2-aryl-4,6-diaminopyrimidine of the formula ##STR10## wherein A.sub.1 and A.sub.2 are identical or different vattable radicals selected from the group consisting of an anthraquinone, a phthaloylacridone, an anthrone, a benzanthrone, an anthanthrone, and anthrimide, an anthrapyridine, an anthrapyrimidine, an anthrapyridone, an anthrapyrimidone, an azabenzanthrone, an isothiazolanthrone, or a pyrazolanthrone, said vattable radicals being unsubstituted or substituted by (1) halogen, (2) trifluoromethyl, (3) lower alkyl, (4) lower alkoxy, (5) lower alkylthio, (6) lower alkylcarbonyl, (7) lower alkoxycarbonyl, (8) amino, (9) mono-lower alkylamino, (10) di-lower alkylamino, (11) formylamino, (12) lower alkylcarbonyl amino, (13) benzoylamino, (14) benzoylamino wherein the benzoyl is substituted by halogen, methyl, methoxy, ethoxy or phenyl, (15) lower alkylsulfonyl amino, (16) phenylsulfonyl amino, or (17) phenylsulfonyl amino wherein the phenyl is substituted by halogen, methyl, methoxy, ethoxy or phenyl and Ar is an aryl radical selected from the group consisting of phenyl, biphenylyl or naphthyl each of said aryl radicals being unsubstituted or substituted by halogen, hydroxy, cyano, nitro, lower alkyl, lower alkoxy, lower alkylcarbonyl or lower alkoxycarbonyl.