Synthesis of and curing additives for phthalonitriles
AssigneeThe Government of the United States of America, as represented by the Secretary of the Navy
InventorsTeddy M. Keller, Matthew Laskoski, Andrew Saab
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Abstract
A method of: providing a solution of a dichloroaromatic compound having an electron-withdrawing group bound to each aromatic ring containing one of the chloride groups; a dihydroxyaromatic compound; an organic transition metal complex or a transition metal salt; a base; and a solvent; and heating the solution to a temperature at which the dichloroaromatic compound and the dihydroxyaromatic compound react to form a dimetallic salt of an aromatic ether oligomer. The molar ratio of the dihydroxyaromatic compound to the dichloroaromatic compound is greater than 2:1. Water formed during the heating is concurrently distilled from the solution.
Claims17
A method comprising:
- providing a solution comprising:
- a dichloroaromatic compound comprising an electron-withdrawing group bound to each aromatic ring containing one of the chloride groups;
- a dihydroxyaromatic compound;
- wherein the molar ratio of the dihydroxyaromatic compound to the dichloroaromatic compound is greater than 2:1;
- a base;
- and
- a solvent;
- and
- heating the solution to a temperature at which the dichloroaromatic compound and the dihydroxyaromatic compound react to form a dimetallic salt of an aromatic ether oligomer;
- wherein water formed during the heating is concurrently distilled from the solution.
Dependencies are inferred from the claim text.