Radiation Dynamics, Inc.

Kennard H Morganstern

Marshall Robert Cleland

Peter R Hanley

Bengt Bjellqvist

Torbjorn Reitberger

The monomer content in acrylonitrile containing polymers, as for example bottles formed from acrylonitrile/styrene copolymer, is substantially reduced by applying ionizing radiation at conventional rates in low dosage levels.

Method for reducing the monomer content in acrylonitrile containing

The monomer content in chlorinated hydrocarbon plastic materials, as for example articles made from polymers of chloroprene vinyl chloride and vinylidene chloride, is substantially reduced by applying ionizing radiation in low dosage levels, e.g. 0.05-2 megarad to the material, either to the fully formed article, or the pellets from which the articles are molded or to the ground resin powder from which the pellets are formed.

Method for reducing the monomer residue content in polymer plastics

An area beam of electrons capable of delivering large doses of electron irradiation at small dose rates and having a predetermined distribution pattern is provided by an electron accelerator comprising plural discrete cathodes positioned as required to achieve the desired pattern. An individual emission control is provided for the filament of each cathode. In a preferred embodiment plural cathodes are movably mounted in a row extending transversely of the transport path of material to be irradiated, a plurality of such rows being positioned along the direction of transport.

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Roslyn, NY, United States of America

Kennard H Morganstern