Salts of 1,3,5-oxadiazines-2,4,6-triones, 1,3,5-oxadiazines-2,4,6-triones and the preparation thereof

A 1,3,5-oxadiazine-2,4,6-trione salt of the following formula (I):

• ##STR19## in which R represents a monovalent, divalent or trivalent alkyl, alkylene, cycloalkyl or arylalkyl radical containing at most 18 carbon atoms;
• Q represents a mono-, bi- or trivalent metal or a group containing a number n of unsubstituted or mono-, di-, tri-, or tetrasubstituted ammonium, phosphonium or arsonium radicals selected from the group consisting of the radicals of the formulae:
• ##STR20## in which n has the meaning given hereafter, Z represents nitrogen, phosphorus or arsenic, R.sup.I, R.sup.II, R.sup.III and R.sup.IV, which are identical or different, represent hydrogen, an alkyl, an aryl or arylalkyl radical containing 1 to 12 atoms, whereby R.sup.IV may also represent a bivalent alkylene radical containing 4 to 6 carbon atoms and two or three atoms of R.sup.I, R.sup.II, R.sup.III and R.sup.IV may also be joined with one or two nitrogen atoms to form a di-lower alkyl piperidinium group, a lower alkyl pyridinium group or a di-lower alkyltriethylene diammonium group;
• R.sup.V and R.sup.VI, which are identical or different, represent a lower alkylene, lower cycloalkylene or phenylene di-lower alkylene radical;
• p is an integer which is equal to 1 to 3 inclusive, and
• n, represents the oxidation number of the metal or the number of ammonium, phosphonium or arsonium functions present in the Q group and is equal to 1 to 40.