The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 17, 2014
Filed:
Dec. 19, 2012
Applicant:
E I Du Pont DE Nemours and Company, Wilmington, DE (US);
Inventor:
Rameshchandra M Gohil, Newark, DE (US);
Assignee:
E I du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29D 22/00 (2006.01); C08L 67/02 (2006.01); C08L 67/04 (2006.01); C08L 3/02 (2006.01); C08L 51/06 (2006.01); C08L 3/00 (2006.01);
U.S. Cl.
CPC ...
C08L 67/02 (2013.01); C08L 67/04 (2013.01); C08L 3/02 (2013.01); C08L 51/06 (2013.01); C08L 3/00 (2013.01);
Abstract
The properties of melt blends of specific aliphatic-aromatic copolyesters and starch are improved by addition of a combination of polylactic acid, graft copolymers such maleic anhydride grafted polyethylene and maleic anhydride grafted polystyrene, and a hindered phenolic antioxidant. The blends exhibit increased melt strength and maximum draw down ratio versus blends of only aliphatic-aromatic copolyesters and starch. Films made from the blend are compostable and exhibit an attractive combination of mechanical and rheological properties for packaging materials.