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:
Sep. 14, 2010
Filed:
Feb. 22, 2008
Nils Dan Anders Södergard, Turku, FI;
Erik Mikael Stolt, Turku, FI;
Heikki Kalervo Siistonen, Turku, FI;
Geoffrey A.r. Nobes, Decatur, IL (US);
Nils Dan Anders Södergard, Turku, FI;
Erik Mikael Stolt, Turku, FI;
Heikki Kalervo Siistonen, Turku, FI;
Geoffrey A.R. Nobes, Decatur, IL (US);
Tate & Lyle Public Limited Company, London, GB;
Abstract
Poly(lactic acid) blends having a relatively high heat distortion temperature can be prepared by simple blending of PLA polymers of opposite stereoforms, followed by processing, e.g. by injection molding, under specific conditions of temperature and pressure, so as to produce a blend which, on differential scanning calorimetry, exhibits two peaks within the melting range of the stereocomplex. Moreover, by careful selection of these conditions of temperature and pressure, it is possible to use PLA polymers of significantly higher molecular weights than previously thought possible.