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US 12,760,126 B2Granted
Biodegradable and/or compostable compositions from blends of bio-based starch mixed esters and biodegradable and/or compostable polymers and methods for making the same
AssigneeEvercorn, Inc.
InventorsYuma Hiromoto, Yuri Sakakibara, Erika Kurachi
Life of this patent
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Abstract
Biodegradable and/or compostable compositions of blends of bio-based starch mixed esters and biodegradable and/or compostable polymers and methods of making them are described. The blend may include from about 20% to about 90% of the described starch mixed esters and from about 10% to about 80% of at least one other biodegradable and/or compostable polymer other than the bio-based starch mixed ester.
Claims15
A method of preparing a biodegradable and/or compostable composition that includes:
- preparing a mixed acid anhydride by reacting an acid anhydride and a carboxylic acid having 10 to 24 carbon atoms;
- reacting the mixed acid anhydride with starch, in the presence of an esterification catalyst selected from an alkaline metal hydroxide or amino compound, to form a starch mixed ester composition;
- and
- mixing the starch mixed ester composition with a biodegradable polymer other than the starch mixed ester composition.
1 more element
Dependencies are inferred from the claim text.