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US 11,453,635 B2Granted
Method of making cyclobutane-1, 2-diacids degradable building blocks for materials
AssigneeUniversity of North Dakota
InventorsQianli Chu, Zhihan Wang
Life of this patent
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Abstract
A method of making cyclobutane-1,2-diacid building blocks includes using trans-cinnamic acid in its beta form (head to head packing) and photodimerizing the trans-cinnamic acid to create cis-cyclobutane-1,2-dicarboxylic acid (CBDA-4).
Claims19
A method of making a cis-cyclobutane-1,2-dicarboxylic acid monomer comprises:
- a. melting trans-cinnamic acid;
- b. dissolving trans-cinnamic acid from step a in an organic solvent to form a trans-cinnamic acid solution;
- c. mixing the trans-cinnamic acid solution from step b into a poor solvent to create a slurry;
- and
- d. irradiating the slurry from step c with a UV irritation source to photo-dimerize β-trans-cinnamic acid and form cis-cyclobutane-1,2-dicarboxylic acid.
2 more elements
Dependencies are inferred from the claim text.