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. 14, 2016
Filed:
Jun. 03, 2015
Total Research & Technology Feluy, Seneffe (Feluy), BE;
Centre National DE LA Recherche Scientifique (Cnrs), Paris, FR;
Sophie Guillaume, Vitre, FR;
Marion Helou, Brussels, BE;
Jean-François Carpentier, Acigne, FR;
Martine Slawinski, Nivelles, BE;
Total Research & Technology Feluy, Seneffe, BE;
Centre National de la Recherche, Paris, FR;
Abstract
Poly(carbonate-urethane) or poly(ester-urethane) may be characterized in that of carbonate soft segments have molecular weights Mn ranging between 10,000 and 250,000 g/mol. The segments' length may be monitored by the ring-opening polymerization condition. The process of preparing the poly(carbonate-urethane) or poly(ester-urethane) may include immortal ring-opening polymerization of a cyclic carbonate or of a cyclic ester or diester monomers in the presence of a first catalyst system and diols or polyols. The process may include chemical modification of the hydroxyl chain-end groups into carboxylic groups in the presence of a second catalyst system. The process may include a coupling reaction with at least 2 equivalents of a second cyclic carbonate, enabling coupling with the carboxylic moiety in the presence of a third catalyst system. The process may include polyaddition of a diamine or a polyamine via ring-opening of the second cyclic carbonate, and obtention of poly(carbonate-urethane) or poly(ester-urethane).