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:
Aug. 14, 2012
Filed:
Feb. 24, 2011
Applicants:
Zhenjiang LI, Nanjing, CN;
Pingkai Ouyang, Nanjing, CN;
He Huang, Nanjing, CN;
Inventors:
Assignee:
Nanjing Universty of Technology, Nanjing, Jiangsu Province, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C 47/78 (2006.01); D01F 1/02 (2006.01); C08G 69/14 (2006.01); C08G 63/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present disclosure provides a method for preparing polylactic acid and its products using a twin-screw extruder, comprising the step of mixing carbon dioxide adducts of carbene and lactide, and obtaining polylactic acid and its products via reactive extrusion using a twin-screw extruder. Some of the carbon dioxide adducts or carbene have the following general formula: