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US 5,292,854 AGranted
Synthesis of phthalonitrile resins containing ether and imide linkages with aromatic diamine curing agent
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorTeddy M. Keller
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Abstract
Imide-containing phthalonitrile monomers are prepared from a phthalonitrile and an aromatic dianhydride. The monomer and a method for preparing the monomer is disclosed. These monomers are synthesized into heat resistant polymers and copolymers with aromatic ring structure incorporating imide and ether linkages. The synthesis of the high temperature thermosetting polymers and copolymers is also disclosed.
Claims12
A method of polymerization comprising:
- heating a composition comprising at least one monomer and at least one aromatic diamine curing agent above the composition melting point;
- continuing to heat said composition at a temperature above the glass transition temperature to the composition gelation point;
- curing the composition to complete crosslinking of the polymer;
- wherein the composition comprises at least one monomer of the formula:
- ##STR16## where R is an aromatic tetravalent radical or substituted aromatic tetravalent radical.
2 more elements
A polymer with repeating units of the general formula:
- ##STR17## which is produced by curing a composition comprising at least one phthalonitrile monomer of the formula:
- ##STR18## and at least one aromatic diamine curing agent, where R is an aromatic tetravalent radical or substituted aromatic tetravalent radical of the general formula:
- ##STR19## and X is ##STR20##
Dependencies are inferred from the claim text.