Aromatic dithio dianhydrides

Details Aromatic dithio dianhydrides Aromatic dithio dianhydrides

1975-10-28

1977-05-17

Love, Ethel G.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 2E, 260 2C, 260326S, 260515P, 260516, C07D30789, C07D40712

Patent

active

040241629

ABSTRACT:
There are provided bis(thioether) aromatic dianhydrides and method for making these materials. A bisthiol in the presence of base, or bisthiol basic salt, can be reacted with a nitro- or halo-substituted phthalic compound, such as an anhydride or anhydride precursor. These aromatic dithiodianhydrides can be used to make polyimides and polyesters, and can be used as curing agents for epoxy resins.

REFERENCES:
patent: 3358045 (1967-12-01), Witt
patent: 3497562 (1970-02-01), Levins
patent: 3542880 (1970-11-01), Rohr et al.
patent: 3666818 (1972-05-01), Brokke
patent: 3787506 (1974-01-01), Ungefug et al.

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