Polyarylene Disulphimide Sulphones

1,197,199. Polyarylene disulphimide sulphones. FARBENFABRIKEN BAYER A.G. 20 Dec., 1967 [21 Dec., 1966], No. 57854/67. Heading C3R. The invention comprises polyarylene disulphimide sulphones containing units of formula where X is chlorine or hydrogen, Ar1 and Ar2 are phenylene or naphthylene radicals, R1 and R2 are hydrogen, alkyl, nitro or halogen, and M1 is an alkali metal. The polymers are prepared by reacting a polychlorodiphenylsulphone of formula with an alkali metal salt of a bis-hydroxyaryldiaulphimide of formula where M is an alkali metal, in a polar organic solvent at 90‹ to 160‹ C. The polymer may be modified by including in the reaction mixtures alkali metal salts of bisphenols of formula where R is an aliphatic, cycloaliphatic or araliphatic radical, -O-, -S- -SO-, -SO 2 - or -CO- or a single bond. The salts of the bis-hydroxyaryl disulphimides and of the bisphenols, when used, may be prepared in situ. In examples, potassium and sodium salts of bis-(4-hydroxyphenyl)-disulphimide sodium are reacted with 4,41-dichlorodiphenyl sulphone, with 3,31,4,41 - tetrachlorodiphenylsulphone and with 3,4,41 - trichlorodiphenylsulphone, some of the reaction mixtures also containing salts of 2,2 - bis - (4 - hydroxyphenyl) - propane, 4,41 - dihydroxy - diphenylsulphone and 2,6 - dihydroxy - naphthalene.