Hoechst Celanese Corporation

George L Lundberg

James B Stamatoff

Subhash Makhija

Lakshaman Mahinda Walpita

Blends of thermotropic liquid crystalline polymers and isotropic melt-processable polymers are made by extruding a molten stream of either a thermotropic liquid crystalline polymer or an isotropic polymer through a heated mixing zone and feeding the other of the two polymers into the stream of the first polymer in the mixing zone. The polymers are mixed under shearing conditions for a time sufficient to yield a uniform blend. Blends made according to this method exhibit improved properties in comparison with blends obtained by feeding the two polymers simultaneously into a heated mixing zone.

Method for making blends of liquid crystalline and isotropic polymers

A low dielectric material made of a liquid crystal polymer, polytetrafluoroethylene, and hollow glass spheres. This material is a relatively low cost, low dielectric blend having good physical strength and chemical and temperature resistance.

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Long Valley, NJ, United States of America

George L Lundberg