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US 11,891,473 B2Granted
Decomposable and recyclable epoxy thermosetting resins
AssigneeThe Regents of the University of California
InventorsMahdi M. Abu-Omar, Shou Zhao
Life of this patent
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Abstract
A thermoset precursor composition includes a backbone comprising an imine bond bonding at least one of: 1) aromatic compounds together, or 2) bonding an aromatic compound to an aliphatic chain, and at least one of: an epoxy group terminating the backbone or an aldehyde group terminating the backbone. The thermoset precursor can have at least two epoxy groups, one epoxy group and one aldehyde group, or two aldehyde groups.
Claims18
A method of recycling a thermoset composition, the method comprising:
- providing a plurality of thermoset precursors, wherein each thermoset precursor of the plurality of thermoset precursors comprises:
- a backbone comprising an imine bond bonding at least one of:
- 1) aromatic compounds together, or 2) an aromatic compound to an aliphatic chain;
- and
- at least one epoxy group terminating the backbone of at least a portion of the plurality of thermoset precursors;
- contacting the plurality of thermoset precursors with a hardener;
- and
- forming a plurality of cross-links between the plurality of thermoset precursors in response to contacting the plurality of thermoset precursors with the hardener to form a thermoset composition;
- forming a first component from the thermoset composition;
- dissolving the first component formed from the thermoset composition in a solvent to form a mixture;
- removing at least a portion of the solvent from the mixture;
- reforming the thermoset composition into a second component;
- and
- removing any remaining solvent from the second component to reform the thermoset composition as the second component.
11 more elements
Dependencies are inferred from the claim text.