Low melting and low viscosity thermoset matrix resins from the Z configuration of polyhydroxy stilbenes
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorMatthew C. Davis
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Abstract
The invention generally relates to novel poly-substituted cis stilbenes, their synthesis, their purification, and their use in thermoset resins. These novel cis stilbenes give rise to thermoset resins with greatly improved processing characteristics such as lower melting temperature and lower viscosity; resulting in polymers and composites having greatly improved thermal stability.
Claims16
A process for the selective extraction of cis-polyhydroxystilbenes of more than 85% purity from a fraction of stilbenes, comprising:
- isomerizing trans-stilbenes in said fraction of stilbenes to cis-stilbenes;
- extracting cis-polyhydroxystilbenes from said isomerized fraction of stilbenes with a solvent;
- wherein said solvent is comprised of one or more solvents in which cis-stilbenes are soluble and trans-stilbenes are insoluble;
- and
- filtering out any insoluble trans-stilbenes and evaporating the solvent extract under reduced pressure to obtain cis-polyhydroxystilbenes.
A process for the selective extraction of cis-polyhydroxystilbenes from a fraction of stilbenes, comprising:
- extracting cis-polyhydroxystilbenes from said fraction of stilbenes with a solvent;
- and
- filtering and evaporating the solvent extract under reduced pressure to exclusively obtain cis-polyhydroxystilbenes
- wherein the selective solvent extraction yields a cis-polyhydroxystilbenes concentration greater than about 95%.
A composition comprising the formula:
- where m is 0, 1, or 2 and n is 1 or 2;
- where R is —OH, cyanate ester (—O—C≡N), glycidyl ether (—O—CH2-2-oxirane), acrylate (—O—CO—C═CH2), or methacrylate (—O—CO—C(CH3)CH2);
- and,
- where R2 is H, or methoxy.
Dependencies are inferred from the claim text.