Process for solution polymerization of acrylonitrile

Claim 1

A PROCESS FOR PREPARING A SOLUTION OF ACRYLONITRILE POLYMER WHICH CAN BE USED DIRECTLY TO MAKE SHAPED ARTICLES WHICH COMPRISES POLYMERIZING MONOMERIC MATERIAL CONSISTING OF FROM 50-100% BY WEIGHT OF ACRYLONITRILE AND UP TO 50% BY WEIGHT TO MAKE A TOTAL OF 100% OF AT LEAST ONE OTHER MONOETHYLENICALLY UNSATURATED, POLYMERIZABLE COMPOUND CONTAINING A SINGLE CH2=C<GROUP, IN AN ORGANIC LIQUID WHICH IS A SOLVENT FOR POLYACRYLONITRILE, AT A TEMPERATURE OF FROM -70 TO 100*C., IN THE PRESENCE OF FROM ABOUT 0.0001 TO ABOUT 3.0% BY WEIGHT BASED ON MONOMER WEIGHT OF A POLYVALENT METAL SELECTED FROM THE GROUP CONSISTING OF COPPER AND RUTHENIUM AND SALTS OF SAID METALS AND (2) FROM ABOUT 0.025 TO ABOUT 2.0% BASED ON MONOMER WEIGHT OF AN OXIDIZING AGENT SELECTED FROM THE GROUP CONSISTING OF MONOPEROXYSULFURIC ACID, PEROXYDISULFURIC ACID, AMMONIUM SALT OF MONOPEROXYSULFURIC ACID, AMMONIUM SALT OF PEROXYDISULFURIC ACID, AN ALKALI METAL SALT OF MONOPEROXYSULFURIC ACID, AN ALKALI METAL SALT OF PEROXYDISULFURIC ACID AND SULFUR TETROXIDE IN COMBINATION WITH WATER.