Diaminophenyl sulphone

Higher heat distortion temperatures are achieved using 4,4 -methylenedi-aniline (diaminodiphenyimethane) and diaminophenyl sulphone, in conjunction with an accelerator, but this is at some expense to chemical resistance. 

Diazotised p-aminophenylarsinic acid is coupled with H acid in alkaline solution and the brownish-violet product cooled and stirred with diazotised diehlorobenzidine. The resultant dyestuff is a glistening dark brown powder, ginng a deep blue solution in water. In place of benzidine or diehlorobenzidine the following may be used tolidine, dianisi-dine, or diaminophenyl urea. Instead of H acid, S-amino-5-naphthol-7-sulphonic acid (J acid), 1 8-aminonaphthol-4-sulphonie acid (S acid or 1 8-dihydroxynaphthalene-8 6-di.sulphonie acid (chronio trope acid) may be employed. 

Beilstein Handbook Reference) AI3-52564 Aniline, 3,3 -sulfonyldi- Benzenamine, 3,3 -sulfonylbis- BRN 2215938 3,3 -Diaminoditenylsulfon 3,3 -Diaminodiphenyl sulfone 3,3 -Diaminophenyl sulfone EINECS 209-967-5 NSC 20610 Sulfone, bis(3-aminophenyl) Sulfone, bis(m-aminophenyl) 3,3 -Sulfonylbis(aniline) 3,3 -Sulfonylbisbenzenamine 3,3 -Sulfonyldianlline 3,3 -Sulphonyldianlline 3,3 -sulfonyldianiline 3-Aminophenyl sulphone. Crystals mp = 171-172 irritant. BASF Corp. Lancaster Synthesis Co., Mitsui Toatsu. 

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