| 摘要 |
A process for preparing a polyarylene sulphide which comprises reacting (a) dihalogenobenzene consisting of 50 to 100 mol % of a compound of the formula <IMAGE> (I) or a compound of the formula <IMAGE> (II) or a mixture thereof and of 0 to 50 mol % of a compound of the formula <IMAGE> (III) wherein X is halogen and each R is selected from the group consisting of hydrogen, alkyl having 1 to 20 carbon atoms, cycloalkyl having 5 to 20 carbon atoms, aryl having 6 to 24 carbon atoms, alkaryl having 7 to 24 carbon atoms and aralkyl having 7 to 24 carbon atoms with the proviso that at least one R is other than hydrogen and (b) 0 to 3.0 mol % based on the dihalogenobenzene content of a polyhalogeno aromatic of the formula ArXn (IV) wherein Ar is an aromatic or heterocyclic radical with 6 to 24 carbon atoms having at least 3 free valencies, X is halogen and n is >/= 3 with (c) an alkyl metal sulphide in (d) a polar solvent in the presence of (e) 0.05-2.0 mol of alkali metal fluoride per mol of alkali metal sulphide, for a polycondensation time of up to 30 hours and at a polycondensation temperature of between 160 DEG and 295 DEG C., the molar ratio of (a) to (c) being in the range from 0.85:1 to 1.15:1 and the molar ratio of (c) to (d) being in the range of from 1:2 to 1:15.
|
