High temperature polymers. I.—Sulfone ether diamines as intermediates for tractable high temperature polymers

A useful synthesis of a series of new aromatic sulfone ether diamines, H2NC6H4O{article}{empty}{document}$----5pt[\ { C}₂ { H}₄ { SO}₂ { C}₆ { H}₄ -- { ORO}----5pt ]_n { OC}₆ { H}₄ { SO}₂ { C}₆ { H}₄ --- { OC}₆ { H}₄ { NH}₂ ${document} , where n = 0, 1, 2…, which increases the tractability of polyimides, polyamide‐imides, and polyamides, was developed. These diamines were prepared by condensing various proportions of sodium p‐aminophenate, sodium bisphenates, and dichlorodiphenyl sulfone. The synthetic procedures are now refined to the point where simply coagulating these diamines into water yields high purity polymer‐grade sulfone ether diamines. The latter have good tractability; and in some cases, it is possible to extrude and injection‐mold these high temperature polymers.