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:
reacting a complex with a first dihaloaromatic monomer to form a polyarylene sulfide prepolymer, the complex including an alkali metal organic amine carboxylic acid salt and an alkali metal hydrogen sulfide; thereafter, carrying out a second polymerization reaction during which the polyarylene sulfide prepolymer is reacted with a second dihaloaromatic monomer and a sulfur-containing monomer in an organic amide solvent to form the polyarylene sulfide, wherein from about 0.1% to about 10% by weight of the total amount of sulfur charged to the multi-stage method is charged to the second polymerization reaction.