US 12,012,503 B2
Impact-modified biodegradable polymer compositions
Christopher McGrady, Walton, KY (US); Rongfu Li, Blacksburg, VA (US); Michael Combs, Shady Spring, WV (US); Xiaowei Zhang, Union, KY (US); and Suresh Subramonian, Cary, NC (US)
Assigned to TICONA LLC., Florence, KY (US)
Filed by Ticona LLC, Florence, KY (US)
Filed on Dec. 10, 2020, as Appl. No. 17/117,939.
Claims priority of provisional application 63/090,349, filed on Oct. 12, 2020.
Claims priority of provisional application 62/946,125, filed on Dec. 10, 2019.
Prior Publication US 2021/0171740 A1, Jun. 10, 2021
Int. Cl. C08L 1/12 (2006.01)
CPC C08L 1/12 (2013.01) [C08L 2207/53 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A polymer composition comprising:
a cellulose acetate comprising greater than 90% by weight cellulose diacetate;
triacetin or polyethylene glycol present in the polymer composition in an amount of from about 8% by weight to about 40% by weight;
a polycaprolactone present in the polymer composition in an amount of from about 2% by weight to about 30% by weight, the polycaprolactone having a number average molecular weight of less than about 15,000 g/mol;
at least one impact modifier, the at least one impact modifier comprising acrylic core/shell particles; and
wherein the polymer composition exhibits an Izod notched impact strength of about 100 J/m at 23° C. or greater.