S-Triazine tetracarboxylic acids and dianhydrides

Details S-Triazine tetracarboxylic acids and dianhydrides S-Triazine tetracarboxylic acids and dianhydrides

1974-07-17

1976-03-23

Ford, John M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260243AE, 2602475C, 260244R, 2602495, 2602499, 2602498, 260 78R, C07D25126, C07D25152

Patent

active

039460118

ABSTRACT:
s-Triazine tetracarboxylic acids having the formula ##SPC1##
Wherein R is an organic blocking group; A is NH, O, or S; Z is the direct bond, O, S, SO.sub.2, ##EQU1## or CH.sub.2 ; and n is 0 or 1, can be prepared by reacting a dihalo triazine with a dicarboxylic acid substituted with an amino, hydroxy, or mercapto group. By dehydrating the acid a corresponding dianhydride is obtained. These compounds are useful in preparing various polymers, as, for example, polyimides.

REFERENCES:
patent: 2804458 (1957-08-01), Wheeler et al.
patent: 3843649 (1974-10-01), Seltzer et al.

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