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US 3,946,011 AGranted
S-Triazine tetracarboxylic acids and dianhydrides
AssigneeCiba-Geigy Corporation
InventorsDavid A. Gordon, Raymond Seltzer
Life of this patent
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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.
Claims6
An s-triazine dianhydride having the formula ##SPC9##
- wherein
- R is hydrogen;
- alkyl of up to 8 carbon atoms;
- cycloalkyl of 3 to 6 carbon atoms;
- phenyl;
- naphthyl;
- biphenyl;
- anthracyl;
- phenyl or naphthyl substituted by nitro, halo, carboxyl, cyano, lower alkyl of up to 4 carbon atoms;
- hydroxy or lower alkoxy of up to 4 carbon atoms;
- benzyl;
- 1-phenylhexyl;
- 1-phenylethyl;
- amino;
- dinaphthylamino;
- diphenylamino;
- N-naphthyl anilino;
- di(lower)alkylamino where each alkyl has up to 4 carbon atoms;
- alkylamino of 1 to 8 carbon atoms;
- anilino;
- N-(lower) alkylanilino where the alkyl has up to 4 carbon atoms;
- phenoxy;
- alkoxy of up to 8 carbon atoms;
- thioalkoxy of up to 8 carbon atoms;
- thiophenoxy;
- mercapto;
- halo;
- hydroxyl;
- carboxyl;
- morpholino;
- pyrrolidino;
- piperidino;
- a group having the structure ##SPC10##
- where X is a covalent bond (9-carbazolyl group), oxygen (10-phenoxazinyl group) and sulfur (10-phenothiazinyl group), a 1-indolyl group having the structure ##SPC11##
- a 2-isoindolyl group having the structure ##SPC12##
- a 1-imidazolyl group having the structure ##SPC13##
- or a 1-pyrroloyl group having the structure ##SPC14##
- A is NH, O, or S;
- Z is the direct bond, O, S, SO.sub.2, ##EQU4## or CH.sub.2 ;
- and n is 0 or 1.
37 more elements
Dependencies are inferred from the claim text.