Back to results
US 9,023,954 B1Granted
Side-chain and end-group modified poly-p-phenylene oligomers
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorMichael E. Wright
Life of this patent
Estimating the term…
Abstract
An efficient synthesis of polymer end-caps and poly-p-phenylene oligomers that absorb little water and provide new processing and curing strategies, and more specifically, high-performance resins and adhesives with low moisture uptake can have a two stage cure path with an unprecedented range of curing temperatures.
Claims4
A method for manufacturing reactive end capped resins or adhesives, comprising:
- dissolving at least one dichloroaromatic monomer and at least one monochloroaromatic protected end cap in a dipolar aprotic solvent;
- adding at least one reducing metal reagent and one transition metal catalyst to create a first mixture;
- heating said first mixture for 1-12 h at a temperature between about 25 to about 100° C. to create a second mixture;
- filtering said second mixture to produce a third mixture;
- adding said third mixture to a non-solvent forming a protected resin, and collecting said protected resin by filtration;
- drying said protected resin at 25 to 100° C. for 24-48 h to produce a dried protected end capped resins or adhesives;
- deprotecting said dried protected end capped resins or adhesives;
- and
- reacting said deprotected end capped resins with a nitrogen including aromatic electrophile to produce reactive end capped resins or adhesives.
6 more elements
Dependencies are inferred from the claim text.