Poly(arylether)/liquid crystalline polyester block copolymers and a process for their production

US5618889A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Robert J. Kumpf · Pittsburgh, US
• Douglas A. Wicks · Mount Lebanon, US
• Dittmar Nerger · Krefeld, DE
• Harald Pielartzik · Pittsburgh, US
• Rolf Wehrmann · Krefeld, DE

Key dates

• Filing date: May 15, 1991
• Grant date: Apr 8, 1997
• Expiry date: May 15, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G81/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Block copolymers represented by the formula ##STR1## are formed by contacting an ester group containing poly(aryl ether ketone) composed of the recurring units ##STR2## with a liquid crystalline polyester represented by the formula ##STR3## in which R.sub.1, R.sub.2 X.sub.2, X, Z, E.sup.1, E.sup.2 E.sup.5, w, x, y, z a, b and n each represent specified groups or values under conditions such that a transesterification reaction will occur.