Patent application number | Description | Published |
20090171066 | Catalytic lactide and glycolide (co)polymerization system - A catalytic lactide and glycolide copolymerization system comprising a trifluoromethane sulfonate as a catalyst and copolymerization additive and a copolymerization process. | 07-02-2009 |
20100036120 | NOVEL METHOD FOR SYNTHESIS OF 1,4-MORPHOLINE-2,5-DIONES - The invention concerns a novel method for synthesis of 1,4-morpholine-2,5-diones of formula (I), wherein: R, R | 02-11-2010 |
20100121021 | PROCESS FOR THE PREPARATION OF POLYLACTONES AND POLYLACTAMS - The present invention relates to a process for the preparation of a lactone or lactam homopolymer, comprising the stage consisting in reacting a lactone or lactam with a nonpolymeric initiator comprising at least one hydroxyl or thiol functional group in a nonchlorinated solvent in the presence of a sulfonic acid of formula R—SO | 05-13-2010 |
20100121024 | METHOD FOR PRODUCING A COPOLYMER OF AT LEAST ONE CYCLIC MONOMER - The present invention relates to a process for the preparation of a copolymer of at least one cyclic monomer chosen from a lactone, a lactam, a lactide and a glycolide, comprising the stage consisting in reacting said cyclic monomer with a polymeric initiator in the presence of a compound carrying a sulfonic acid functional group. | 05-13-2010 |
20100209384 | Sustained release formulations comprising very low molecular weight polymers - The present invention relates to a parenteral, sustained and controlled release, semisolid formulation comprising an end-capped oligomer and at least one active substance without any supplementary viscosity reducing agent or excipient. | 08-19-2010 |
20110054144 | NOVEL CATALYTIC SYSTEMS FOR THE RING-OPENING (CO)POLYMERIZATION OF LACTONES - The present invention relates to the use of a system composed of a base and of a sulphonamide, as a catalyst for the ring-opening (co)polymerization of lactones. The present invention also relates to novel sulphonamides and to a process for the ring-opening (co)polymerization of lactones comprising the use of sulphonamides in combination with a base as a catalytic system. | 03-03-2011 |
20120035341 | PROCEDE DE POLYMERISATION PAR VOIE CATALYTIQUE DE 1,4-DIOXANES-2,5-DIONES ET LES POLYMERES CORRESPONDANTS - A method for polymerizing 1,4-dioxane-2,5-diones in the presence of a generally protic initiator and at least one catalyst including at least one metal-free organic compound. The latter is a non-metal organic catalyst most often selected from among pyridines of which DMAP is a derivative, sulfonic acids, polycyclic tertiary amines, phosphazenes, thioureas, thioureas/amines, and guanidines. The invention also relates to polymers obtained by the method. | 02-09-2012 |
20120108786 | ORGANIC SYSTEM FOR THE RING-OPENING POLYMERIZATION OF CYCLIC CARBONATES IN ORDER TO OBTAIN (BIO)-POLYCARBONATES - An organocatalytic system, having a sulfonic acid as catalyst, for the polymerization of carbonates, and a polymerization process employing said system to obtain bio-polycarbonates devoid of ether units inserted by decarboxylation. The catalyst system for the ring-opening polymerization reaction of cyclic carbonates is formed of an initiator and, as catalyst, of a sulfonic acid of formula R′—SO | 05-03-2012 |
20130237682 | METHOD FOR PREPARING STAR POLYMERS - The invention relates to a method for preparing linear polymers having an amide end or having a star architecture comprising an amide core, by means of a ring opening using lactide and glycolide monomers or a lactide monomer ring in the presence of a catalyst, wherein the method includes the steps of: (i) reacting the excess monomer(s) with an initiator in a solvent, said initiator being selected from among an amine and an amino alcohol, given that the initiator has at least one primary or secondary amine function; (ii) adding a catalyst, said catalyst being a non-nucleophilic base and including at least one neutral sp2 nitrogen atom; and (iii) neutralizing the reaction mixture. Said novel method is particularly advantageous in that it can be easily monitored and enables better modulation of the polymers, and thus of the properties thereof, than the methods of the prior art. The invention also relates to novel polymers that are obtainable by means of said method. | 09-12-2013 |
20130243719 | POLYMERIC CONJUGATES OF ACTIVE PRINCIPLES, THEIR PROCESS OF PREPARATION AND THEIR POLYMERIC INTERMEDIATES - The present invention relates to novel conjugates of active principles grafted to a polymer, to the nanoparticles comprising them, to their preparation and to their polymeric intermediates. | 09-19-2013 |
20130317121 | METHOD FOR THE PREPARATION OF PLYMERS WITH VARIED ARCHTECTURE AND AMIDE INITIATION - The invention relates to a method for preparing linear polymers having an amide end or having a star architecture comprising an amide core, by means of a ring opening using lactide and glycolide monomers or a lactide monomer ring in the presence of a catalyst, wherein the method includes the steps of: (i) reacting the excess monomer(s) with an initiator in a solvent, said initiator being selected from among an amine and an amino alcohol, given that the initiator has at least one primary or secondary amine function; (ii) adding a catalyst, said catalyst being a non-nucleophilic base and including at least one neutral sp2 nitrogen atom; and (iii) neutralizing the reaction mixture. Said novel method is particularly advantageous in that it can be easily monitored and enables better modulation of the polymers, and thus of the properties thereof, than the methods of the prior art. The invention also relates to novel polymers that are obtainable by means of said method. | 11-28-2013 |