Preparation of salts of antimony (V) esters
OwnerRichard Norris Knowlesinventor
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Abstract
Water soluble salts of antimony (V) glycol esters are useful flame retardants for such meterials as textiles or polymeric resins. These flame retardants are applied together with a source of organic halogen. A typical such salt is tri(ethylenedioxy)hydrogen antimony (V), sodium salt.
Claims4
A process for the preparation of a compound of the formula ##EQU3## wherein each of R.sub.1 and R.sub.2 independently is hydrogen or methyl:
- M is the cation of lithium, sodium, potassium, magnesium, calcium, strontium, barium, zinc, cadmium, guanidinium, ethylenediammonium, or ammonium having the following formula ##EQU4## wherein each of R.sub.3, R.sub.4, and R.sub.5 independently is hydrogen, methyl, ethyl or 2-hydroxyethyl;
- and
- x is the valence of the cation and has the value of 1 or 2;
- said process comprising the reaction of the compound of formula ##EQU5## with the hydroxide or carbonate of the cation M.sup..sup.+ x in a glycol containing vicinal hydroxy groups, at a temperature below the decomposition temperature of the resulting salt;
- in the presence of 0-30 weight percent of water based on the total solvent mixture.
A process for the preparation of a compound having the formula ##EQU6## said process comprising a metathetic exchange between a compound of the formula ##EQU7## and a soluble salt of the cation M.sub.A.sup..sup.+ 2 in a solvent consisting of a mixture of 0-70% by weight of a glycol containing vicinal hydroxyl groups and 30-100% by weight of water;
- each of R.sub.1 and R.sub.2 being independently hydrogen or methyl;
- M.sub.a being the cation of magnesium, calcium, strontium, barium, zinc, or cadmium;
- and
- M.sub.b being the cation of lithium, sodium, potassium, or ammonium.
Dependencies are inferred from the claim text.