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US 12,741,950 B1Granted
Coumarin-based thermosets and thermoplastics
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsBenjamin G. Harvey, Joshua E. Baca, Michael D. Garrison
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Abstract
The invention relates to a method of synthesizing less toxic, sustainable bisphenols having a coumarin-type structure and the polymers derived therefrom. The method synthesizes the bisphenolic coumarins from biologically derived phlorogincol and β-keto esters. The bisphenolic coumarins can be converted coumarin-based polymers including engineering thermoplastics and high-performance thermosetting resins.
Claims11
A method for synthesizing a sustainable bisphenolic coumarin, the method comprising:
- (a) providing a phloroglucinol and at least one β-keto ester, where the phloroglucinol is derived from biological source materials;
- (b) placing the phloroglucinol, the at least one β-keto ester, and a catalyst in a reaction vessel;
- (c) heating the reaction vessel;
- and
- (d) allowing the phloroglucinol to react with the at least one β-keto ester for a reaction time in the range of about 5 minutes to about 30 minutes, thereby producing bisphenols having a coumarin-based structure.
2 more elements
Dependencies are inferred from the claim text.