Toughened Polylactic Acid Polymers and Copolymers
AssigneeTepha, Inc.
InventorsSaid Rizk, David P. Martin, Kicherl Ho, Amit Ganatra, Simon F. Williams
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Abstract
Toughened compositions of PLA and PLA copolymers are disclosed, which also have low tensile modulus values and greater elongation to break. These toughened compositions are prepared by blending PLA and PLA copolymers with poly-4-hydroxybutyrate, and copolymers thereof. Blending of poly-4-hydroxybutyrate with PLA and its copolymers has been found to impart advantageous properties to the resulting blend. These compositions, and objects formed from these compositions, have improved toughness and lower stiffness than polylactic acid polymers or copolymers alone.
Claims14
A polymer composition comprising polylactic acid polymer or copolymer and a polymer or copolymer comprising 4-hydroxybutyrate, wherein the elongation to break of the composition is greater than 3%.
A method of producing a shaped object comprising melting a polymer composition comprising polylactic acid polymer or copolymer and a polymer or copolymer comprising 4-hydroxybutyrate, wherein the elongation to break of the composition is greater than 3%, and producing a shaped object therefrom by extrusion, molding, coating, spinning, blowing, thermoforming or calendaring processes, or combinations of these processes.
A medical device comprising a polymer composition comprising polylactic acid polymer and copolymer and a polymer or copolymer comprising 4-hydroxybutyrate, wherein the elongation to break of the composition is greater than 3%.
A shaped object comprising a polymer composition comprising polylactic acid polymer or copolymer and a polymer or copolymer comprising 4-hydroxybutyrate, wherein the elongation to break of the composition is greater than 3%.
Dependencies are inferred from the claim text.