Abstract: The invention relates to aqueous solutions of alkali silicates and alkali hydrogen phosphates comprising:From about 4 to 18%, by weight, of K.sub.2 Ofrom about 2 to 11%, by weight, of Na.sub.2 Ofrom about 3 to 10%, by weight, of P.sub.2 O.sub.5from about 12 to 21%, by weight, of SiO.sub.2based on the sum total of the constituents including water, wherein the ratio of the sum totals of the parts by weight, of (K.sub.2 O+Na.sub.2 O):(P.sub.2 O.sub.5 +SiO.sub.2) is from about 1:0.9 to about 1:1.7 and has a solids content of from about 30 to about 50%, by weight. The solutions are homogeneous and stable and are particularly useful in improving the burning properties of organic/inorganic plastics. The invention also relates to a process for preparing these solutions which preferably involves introducing an aqueous alkali hydrogen phosphate solution into an aqueous silicate solution.

Abstract: 4,5-BIS-(TRIFLUOROMETHYLIMINO)OXAZOLES OR DIAZOLES ARE PREPARED BY REACTING THE ENOL FORM OF AN AMIDE OR AN IMIDE OF A CARBOXYLIC ACID OR CARBONIC ACID, HAVING AT LEAST ONE HYDROGEN ATOM ON EACH OF AN OXYGEN AND NITROGEN OR TWO NITROGEN ATOMS VICINAL TO THE AMIDE CARBON ATOM, WITH PERFLUORO-2,5-DIAZAHEXA-2,4-DIENE IN THE PRESENCE OF A HYDROGEN FLUORIDE ACCEPTOR AT A TEMPERATURE OF ABOUT -50.degree. TO 120.degree.C, in accordance with the following formula ##EQU1## in which Z is oxygen, R-N= or ##EQU2## and X is oxygen or ##EQU3## and R, R', R" and R"' each is hydrogen or various optionally substituted hydrocarbon or heterocyclic radicals, several of them together possibly forming a heterocyclic ring.The invention also extends to compositions containing, and methods of using, the new compounds to combat fungi, insects and acarids.