Patent ID: 11905394
Assignee: EASTMAN CHEMICAL COMPANY
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A cellulose ester composition comprising 55 to 99 wt % of at least one cellulose ester, 1 to 30 wt % of at least one impact modifier, and 1 to 15 wt % of at least one plasticizer, based on the total weight of the composition, wherein the at least one cellulose ester is a cellulose acetate, wherein the composition has an HDT value greater than 95° C., and a notched Izod impact strength value greater than 80 J/m measured according to ASTM D256 on 3.2mm thick bars at 23° C., after conditioning the bars at 230° C. and 50% RH for 48 hours;
wherein the impact modifier is a block copolymer in which at least one segment of the block copolymer has a glass transition temperature (“Tg”) that is below room temperature and at least one segment of the block copolymer has a Tg or a melting point (“Tm”) that is above room temperature and wherein the block copolymer is one or more thermoplastic elastomers chosen from a styrenic elastomer selected from the group consisting of styrene-butadiene-styrene (SBS), styrene-ethylene-butylene-styrene (SEBS), styrene-isoprene (SIS), thermoplastic urethanes (TPUs), polyester-ether copolymers, or polyamide-ether copolymers.