Preparation of low color copoly(arylene sulfide) by heating copoly(arylene sulfide)

US4945155A · kind A · utility

Assignee

• EASTMAN KODAK COMPANY · US

Inventors

• David R. Fagerburg · Kingsport, US
• Mark Rule · Kingsport, US
• Joseph J. Watkins · Kingsport, US
• Paul B. Lawrence · Kingsport, US

Key dates

• Filing date: May 11, 1989
• Grant date: Jul 31, 1990
• Expiry date: May 11, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G75/14
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process comprising heating for a sufficient period of time and at a temperature in the range of the glass transition temperature of the polymer to 5 degrees C below the melting point of the polymer, a solid, comminuted, copoly(arylene sulfide) prepared by reacting at a polymer producing temperature a mixture of a diiodoaromatic compound and elemental sulfur which contains less than 0.05 weight percent carbon, the copoly(arylene sulfide) corresponding to the structure EQU [(--A--S--).sub.1--x (--A--S--S--).sub.x ].sub.n wherein A is a divalent substituted or unsubstituted aromatic radical, x is in the range of 0.2 to 0.005 and n is at least 100.