Solutions of acrylonitrile polymers

Abstract

Abstract An acrylonitrile polymer or copolymer is dissolved in a binary mixture consisting of nitromethane and an auxiliary solvent which is formic acid, formamide, dichloroacetic acid, cyanoacetic acid or alpha-hydroxy-beta-trichloro-propionitrile, the nitromethane being present in an amount of from 20-90 volumes per cent based on the total volume of the mixture. Substances which may be copolymerized with the acrylonitrile include vinyl acetate, vinyl chloride, acrylic acid and its esters and homologues, styrene, isobutene and butadiene. The solutions may be used for the production of films, sheets, rods, tubing, containers and fibres. Specifications 579,887, 594,999 and 595,054 are referred to.

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