Oligomeric hydroxy arylether phthalonitriles and synthesis...

C - Chemistry – Metallurgy – 08 – G

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C08G 65/40 (2006.01) C08F 14/00 (2006.01) C08F 214/00 (2006.01) C08F 236/10 (2006.01) C08F 236/12 (2006.01) C08F 236/16 (2006.01) C08G 65/48 (2006.01) C08G 79/02 (2006.01)

Patent

CA 2478725

An aromatic ether oligomer or polyaromatic ether comprising the formula: (1) wherein Ar is an independently selected divalent aromatic radical; formed by reacting a dihydroxyaromatic with a dihaloaromatic; and wherein the reaction is performed in the presence of a copper compound and cesium carbonate. The polyaromatic ether is formed when neither the dihydroyxaromatic nor the dihaloaromatic is present in an excess amount. The aromatic ether oligomer is formed by using an excess of either dihydroxyaromatic or dihaloaromatic. A phthalonitrile monomer comprising the formula: (2) formed by reacting a 3- or 4-nitrophthalonitrile with a hydroxy-terminated aromatic ether oligomer. A thermoset formed by curing the phthalonitrile monomer. Processes for forming all the above.

L'invention concerne un oligomère d'éther aromatique ou un éther polyaromatique de formule (A) dans laquelle Ar désigne un radical aromatique divalent sélectionné indépendamment que l'on obtient par la réaction d'un dihydroxyaromatique avec un dihaloaromatique et dans laquelle la réaction s'effectue en présence d'un composé de cuivre et d'un carbonate de césium. On obtient un éther polyaromatique lorsque ni la quantité de dihydroxyaromatique ni celle de dihaloaromatique est excessive. L'oligomère d'éther aromatique s'obtient lorsqu'il y a un excès d'hydroaromatique ou de dihaloaromatique. L'invention concerne également un monomère de phtalonitrile de formule (B) que l'on obtient en faisant réagir un 3- ou 4-nitrophtalonitrile avec un oligomère d'éther aromatique à terminaison hydroxy. L'invention concerne par ailleurs un thermodurci que l'on obtient par durcissement du monomère de phtalonitrile, ainsi que les procédés d'obtention des composés précités.

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