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:
May. 05, 2009
Filed:
Apr. 06, 2007
Didier Bourissou, Plaisance du Touch, FR;
Olivier Thillaye Du Boullay, Montans, FR;
Emmanuel Marchal, Albi, FR;
Bianca Martin-vaca, Toulouse, FR;
Didier Bourissou, Plaisance du Touch, FR;
Olivier Thillaye Du Boullay, Montans, FR;
Emmanuel Marchal, Albi, FR;
Bianca Martin-Vaca, Toulouse, FR;
Isochem, Paris, FR;
Centre de la Recherche Scientifique (CNRS), Paris, FR;
Universite Paul Sabatier Toulouse III, Toulouse, FR;
Abstract
The invention concerns a method for preparing poly(-hydroxy acids), the polymerization reaction being performed in controlled manner in the presence of a catalytic system including a base, said base being a 5- or 6-membered aromatic heterocycle comprising at least one endocyclic nitrogen atom, provided that when the base is used alone in the catalytic system, it does not represent pyridine, 2-methylpyridine, 2,6-dimethylpyridine or 2-methoxypyridine. The invention also concerns poly(-hydroxy acids) of formula (IV). Finally, the invention concerns the use of a poly(-hydroxy acid), obtainable by the inventive method, for vectoring active principles or for making biomaterials.