Abstract: The invention provides triaryl phosphates of the general formula ##STR1## wherein x is 1 or 2, R.sub.1 is hydrogen, R.sub.2 and R.sub.3 are the same or different and represent hydrogen, t-butyl or isopropyl, R.sub.4 is hydrogen or an isopropyl group and R.sub.5 is an isopropyl group, with the proviso that at least one of the aryl radicals is a di-isopropylphenyl radical, but not more than two of the three aryl groups are identical.

Abstract: Flameproofing of aromatic polymers is achieved by adding a synergistic combination of (a) a phosphorus compound and (b) a compound of formula R(CH.sub.2 X).sub.n, wherein R is an aromatic or heterocyclic residue, X is a leaving group and n is at least 2. Preferred phosphorus compounds are esters of phosphoric acid. The flameproofed polymers may contain aromatic groups in the main chain or as side-groups, for instance styrene polymers and copolymers, aromatic polyesters, polycarbonates and polyphenylene oxides.

Abstract: Aromatic hydrocarbon oligomers of the formula(A).sub.a (--CH.sub.2 --).sub.b [--CH.sub.2 (OCH.sub.2).sub.m OCH.sub.2 --].sub.c (--CH.sub.2 X).sub.dwherein A is at least one aromatic hydrocarbon or heterocyclic residue, X is OH or a derivative thereof, a is 2 to 20 but equals b+c+1, b is 0 to 19, c is 0 to 19, d is 0 to 2a and m is 0 to 10, there being at least two (--CH.sub.2 X) groups per molecule, the group each --CH.sub.2 O--CH.sub.2 -- portion of the group counting as (--CH.sub.2 X) for this purpose, are suitable as non-volatile fire retardent agents in chlorine-containing aliphatic polymers, copolymers or polyblends, which contain an ester of an phosphorus acid.

Abstract: Flameproofing of aromatic polymers is achieved by adding a synergistic combination of (a) a phosphorus compound and (b) a compound of formula R(CH.sub.2 X).sub.n, wherein R is an aromatic or heterocyclic residue, X is a leaving group and n is at least 2. Preferred phosphorus compounds are esters of phosphoric acid. The flameproofed polymers may contain aromatic groups in the main chain or as side-groups, for instance styrene polymers and copolymers, aromatic polyesters, polycarbonates and polyphenylene oxides.

Abstract: Functional fluid composition comprising an ester of a phosphorus acid and a compound of the formula Ir(ch.sub.2 x).sub.n (I)in which R represents an aromatic hydrocarbon or heterocyclic containing residue, n is an integer of at least 2, and each X is the same or different and represents a leaving group, which composition may be used for a wide variety of purposes, for example in hydraulic machinery employed in foundries and mines, in hydraulic systems for aircraft, in turbines and as fluids in electrical equipment and in heat transfer devices.