Rohm and Haas Company

Glenn W Miller

Robert E Jerman

Leslie Alan Cohen

William T Freed

Lucinda F Buhse

Jeffrey Lawrence Daecher

A process is provided for modifying the residence time distribution of materials in an extruder which results in a residence time distribution comparable to that obtained in a continuous stirred tank reactor. An extruder is provided which has a section which modifies the residence time distribution of materials loaded into the extruder.

Extruder and process modifying residence time distribution

Polyglutarimides exhibit improved optical properties, as well as lowered content of non-aqueous volatiles, when the molten polyglutarimide is mixed with water, methanol, ethanol, or mixtures thereof, and the water, methanol, ethanol, or mixtures thereof is removed prior to isolation and processing of the polyglutarimide.

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Cherry Hill, NJ, United States of America

Glenn W Miller