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:
Apr. 22, 2008
Filed:
Aug. 08, 2005
Ramani Narayan, Okemos, MI (US);
Jean-marie Raquez, Mons, BE;
Sunder Balakrishnan, East Lansing, MI (US);
Philippe Dubois, Ciplet, BE;
Philippe Degee, Hautrage, BE;
Ramani Narayan, Okemos, MI (US);
Jean-Marie Raquez, Mons, BE;
Sunder Balakrishnan, East Lansing, MI (US);
Philippe Dubois, Ciplet, BE;
Philippe Degee, Hautrage, BE;
Board of Trustees of Michigan State University, East Lansing, MI (US);
Abstract
A polymerization process to derive a thermal-stabilized poly(1,4-dioxan-2-one) and cyclic ester monomer copolymer using a coordination-insertion catalyst/initiator. 1,4-dioxan-2-one and cyclic ester monomer, each containing less than 100-ppm water and having an acid value less than 0.5 mg KOH/g, and preferably less than 0.2 mg KOH/g, are copolymerized. Preferably the cyclic ester monomer is ε-caprolactone and the reaction is in an extruder.