Maro Publications

Polylactic Acid (PLA)

Patents with Abstracts


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Articles with Abstracts

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Patents without Abstracts

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Patents with Abstracts

4. 8,242,186 
Lactic acid oligomer and method for producing the same
Nagahata et al of the National Institute of Advanced Industrial Science and Technology, Japan, produced a lactic acid oligomer by subjecting an aqueous lactic acid solution to a polycondensation reaction under microwave irradiation  The polycondensation reaction is carried out under reduced pressure in the absence of a polymerization catalyst and an organic solvent.  An initial polycondensation reaction is carried out under normal pressure, and thereafter, a reaction is carried out under reduced pressure. The pressure is reduced stepwise to give a final pressure of 2000 Pa or less. A lactic acid oligomer which has a high purity and is safe from hygiene point of view can be obtained at a low cost in a short time. (RDC 8/29/2012)

3. 8,241,545 
Method of making polylactic acid and its products
Li, Ouyang and Huang of Nanjing Universty of Technology, China, developed a method for preparing polylactic acid and its products using a twin-screw extruder by mixing carbon dioxide adducts of carbene and lactide, and obtaining polylactic acid and its products via reactive extrusion.  (RDC 8/16/2012)

2. 8,137,818 
Poly(lactic acid)-containing compositions for use in imparting oil, grease, or water resistance to paper
Harrison et al of Tate & Lyle Ingredients Americas, Illinois, developed a coating for paper containing from 5  to 50 parts by weight of a branched polylactic acid;  50 to 95 parts and 0.1 to 1 part surfactant. The composition can be coated onto paper for oil, grease, and moisture resistance.  (RDC 5/15/2012)

1. 8,133,558 
Polylactic acid blown film and method of manufacturing same
Tweed, Stephens and Riegert of Plastics Suppliers, Ohio, produced PLA blown film by drying the pellets, melting the pellets at 375 to 425 F, and blowing and stretching  the film at 375 to 480 F without additional plasticizers. These PLA films are environmentally degradable and useful for packaging and labeling.  (RDC 5/2/2012)


Roger D. Corneliussen

Maro Polymer Links
Tel: 610 363 9920
Fax: 610 363 9921


Copyright 2012 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen

** Date of latest addition; date of first entry is 5/2/2012.