Patent ID: 6013761
Filing Date: 2000-01-11
Classification: C08G

Abstract:
A process for the preparation of polyarylene sulfoxide, in which polyarylene sulfide, suspended in a concentrated acid of the formula R--SO.sub.3 H or of the formula R.sup.1 --CR.sup.2 R.sup.3 --COOH, in which R is a halogen atom, an OH group, an aliphatic radical having 1 to 6 C atoms, a halogenated aliphatic radical having 1 to 6 C atoms or an aromatic radical having 6 to 18 C atoms, R.sup.1 is a halogen atom and R.sup.2 and R.sup.3, independently of one another, are each a halogen atom, an aliphatic radical having 1 to 5 C atoms or a halogenated aliphatic radical having 1 to 5 C atoms, is oxidized by metering in a 30 to 100% strength hydrogen peroxide solution with thorough mixing and at a temperature of from -20 to +45.degree. C.