Fiber-Reinforced Phthalonitrile Composite Cured with Low-Reactivity Aromatic Amine Curing Agent
Patent, Filed 2 Oct 1997, patented, 14 Dec 1999
DEPARTMENT OF THE NAVY WASHINGTON DC
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A fiber-reinforced phthalonitrile composite is made by impregnating or coating a fibrous material with a phthalonitrile prepolymer mixture containing a phthalonitrile monomer and an aromatic amine curing agent that is thermally stable and nonvolatile at a temperature up to about 375 deg C., and that contains at least one electron withdrawing substituent effective to reduce the reactivity of the aromatic amine curing agent with the phithalonitrile monomer.
- Laminates and Composite Materials