Biodegradable compositions and articles formed therefrom

A biodegradable composition, wherein the composition comprises:

• (a) a cellulose ester which is a cellulose acetate propionate (“CAP”);
• and
• (b) a biodegradable polymer which is a polyester,
• wherein the polyester is chosen from poly(butylene succinate) (“PBS”), poly(butylene succinate adipate) (“PBSA”), polycaprolactone (“PCL”), poly(butylene adipate terephthalate) (“PBAT”), polylactic acid (“PLA”) or combinations thereof,
• wherein the CAP has an average degree of substitution for hydroxyl substituents that is from 0.3 to 1.2, an average degree of substitution for the acetyl substituents (“DSAc”) that is from 0 to 0.5, an average degree of substitution for the propionyl substituents (“DSPr”) that is from 1.3 to 2.5, and a ball drop viscosity of from 0.1 to 30 seconds as measured according to ASTM D-1343,
• wherein the CAP is present at from 1 wt % to 34 wt % based on the total weight of the composition,
• wherein the composition has a glass transition temperature (“Tg”) of from −60 to −10° C., a melting temperature (“Tm”) of from 60 to 130° C., a crystallization temperature (“TC”) of from 20 to 85° C., and a viscosity reduction of at least 20° C. measured at 180 to 230° C. as compared to the polyester.