US Patent Issued to Eastman Chemical on Sept. 2 for "Blends of copolyesters having recycled content and high heat resistance" (Tennessee Inventors)

ALEXANDRIA, Va., Sept. 3 -- United States Patent no. 12,404,400, issued on Sept. 2, was assigned to Eastman Chemical Co. (Kingsport, Tenn.).

"Blends of copolyesters having recycled content and high heat resistance" was invented by Katherine Augusta Hofmann (Kingsport, Tenn.), John Thomas Hofmann (Kingsport, Tenn.) and Douglas Weldon Carico (Kingsport, Tenn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Described are polymer compositions that include a blend of recycled poly(ethylene terephthalate) (rPET) and a copolyester based on monomers that include on terephthalic acid (TPA), ethylene glycol (EG) and 2,2,4,4-tetramethyl-1,3-cyclobutanediol (TMCD), wherein the blend has improved engineering properties co...