Process for the preparation of polyarylene sulphides

Details Process for the preparation of polyarylene sulphides Process for the preparation of polyarylene sulphides

C - Chemistry, Metallurgy

08

G

402/344

C08G 75/14 (2006.01) C08G 75/02 (2006.01)

Patent

CA 1186447

PROCESS FOR THE PREPARATION OF POLYARYLENE SULPHIDES Abstract of the Disclosure High molecular weight p-polyarylensulfides having a high melt viscosity, capable of being processed thermo- plastically, and have good mechanical properties are pro- duced by reacting components a), b), and c) in a polar solvent with a molar ratio of a) : c) in the range of 0.85:1 to 1.15:1 and a molar ratio of c) : lactam in the range of 1:2 to 1:15, for a time of up to 10 hours at a temperature of from 160°C to 300°C, and in the pre- sence of from 2 to 100 mole percent, relative to c), of an N,N -dialkylcarboxamide; wherein component a) is dihalogenobenzene with 50 to 100 mole percent of the formula Image and 0 to 50 mole percent of the formula Image wherein X is fluoro, chloro, bromo or iodo, and R is the same or different and each 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, aralkyl having 7 to 24 carbon atoms, and two R moieties linked together forming aryl having 6 to 24 carbon atoms or a heterocyclic moiety having an oxygen, nitrogen or sulphur hetero-atom and having 6 to 24 carbon atoms; with the proviso that at least one R is not hydrogen; component b) is 0.1 to 2.4 mole percent, relative to the dihalogenobenzene, of a polyhalogenoaromatic of the formula ArXn wherein Ar is aryl or a heterocyclic moiety having an oxygen, nitrogen or sulphur heteroatom with said aryl and said heterocyclic each having from 6 to 24 carbon atoms; X is fluoro, chloro, bromo or iodo; and n is 3 or 4; and component c) is alkali metal sulphide.

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