公开(公告)号：US3505266A

公开(公告)日：1970-04-07

申请号：US3505266D

申请日：1967-05-08

Applicant: BAYER AG

Inventor： SULING CARLHANS ,  KRAMER DIETER ,  UNBEHEND MANFRED

IPC: C08F20/44 ,  D01F6/18 ,  C08F1/76 ,  C08F3/76

CPC classification number: D01F6/18 ,  C08F2/36 ,  C08F20/44

Abstract: A solution of an acrylonitrile polymer is produced by polymerizing acrylonitrile in an organic solvent for polyacrylonitrile, at a temperature of from + 10 DEG to - 68 DEG C. in the presence of 0.1 m.mol. to 0.1 mol., per mol. of monomer, of an alkali metal salt of an aliphatic or cycloaliphatic sulphonamide of the formula wherein M represents Li, Na, K, Rb or Cs, R1 represents an alkyl or cycloalkyl radical and R2 represents an alkyl radical. Specified salts are those of N-methyl, N-isopropyl or N-isobutyl methane sulphonamide, N-methyl n-butane sulphonamide, N - n - propyl ethane sulphonamide, N-methyl cyclohexane sulphonamide and long-chain aliphatic sulphonamides. Suitable solvents are dimethyl formamide and dimethyl sulphoxide. In examples, dimethyl formamide solutions of polyacrylonitrile are produced using potassium N-methyl or N-isobutyl methane sulphonamide or lithium N-isobutyl or N-isopropyl sulphonamide. The catalyst is deactivated with HCl or toluene sulphonic acid.