Maryland's Defense Patent Database

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Synthesis of and curing additives for phthalonitriles

Patent image
NRL

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.

Inventors: 
Keller, Teddy M.; Laskoski, Matthew; Saab, Andrew
Patent Number: 
Technical domain: 
Materials and Coatings
FIle Date: 
2014-05-27
Grant Date: 
2014-10-14
Grant time: 
140 days
Grant time percentile rank: 
2
Claim count percentile rank: 
5
Citations percentile rank: 
1
'Cited by' percentile rank: 
1
Assignee: 
US NAVY