Process for forming low halogen content polyarylene sulfides

摘要

A multi-stage process and system for formation of a polyarylene sulfide is described. A first polymerization stage of the formation process can include reaction of a sulfide monomer with a dihaloaromatic monomer to form a prepolymer. A second polymerization stage can include further polymerization of the prepolymer with a sulfur-containing monomer and a dihaloaromatic monomer to form a low halogen content polyarylene sulfide. The amount of sulfur utilized in the second polymerization stage is a low fraction of the total amount of sulfur utilized in the multi-stage process.

主权项

1. A multi-stage method for forming a polyarylene sulfide comprising:
providing a complex that includes an alkali metal organic amine carboxylic acid salt and an alkali metal hydrogen sulfide; carrying out a first polymerization reaction in a first reactor during which a first amount of the complex is supplied to the first reactor and reacted with a first dihaloaromatic monomer in the presence of a first organic amide solvent to form a polyarylene sulfide prepolymer; thereafter, carrying out a second polymerization reaction in a second reactor during which a second amount of the complex is supplied to the reactor and reacted with the polyarylene sulfide prepolymer and a second dihaloaromatic monomer to form the polyarylene sulfide.