Patent application number | Description | Published |
20090306276 | USE OF COMPOSITE MATERIALS BASED ON CARBON NANOTUBES AS THICKENING AGENTS FOR AQUEOUS SOLUTIONS - The present invention relates to the use of composites based on carbon nanotubes as viscosity enhancers for aqueous solutions, characterized in that said composite comprises carbon nanotubes (CNTs) and at least one hydrophilic (co) polymer. | 12-10-2009 |
20100069577 | COPOLYMERS BASED ON METHACRYLATE UNITS, PREPARATION METHOD THEREOF AND USE OF SAME - The invention relates to a method for preparing a copolymer having a backbone based on methacrylate units, comprising a step involving the polymerization of one or more precursor methacrylate monomers of said units in the presence of: a polymerization initiator; at least RAFT-type transfer agent which can generate a primary radical; and at least one comonomer selected from among styrene monomers and acrylate monomers. The invention also relates to the resulting copolymers capable of being obtained according to this process, in particular block copolymers, in particular block copolymers, and to the use thereof as additives for plastic materials. | 03-18-2010 |
20100255329 | COPOLYMERS(S) LATEX, METHOD FOR PREPARING SAME AND USE THEREOF FOR COATING PAPER AND CARTON - The invention relates to copolymer(s) latexes prepared from vinylic monomers, non-conjugated dienes and optionally comonomers, particularly acrylic ones, in the presence of at least one chain transfer agent of the following formula. | 10-07-2010 |
20110136963 | METHOD FOR SNYTHESIZING AMPHIPHILIC GRADIENT COPOLYMERS SOLUBLE IN AN ALKALINE MEDIUM - The present invention relates to a process for the preparation of amphiphilic gradient copolymers by Controlled Radical Polymerization in the presence of a RAFT (Reversible Addition Fragmentation Transfer) agent. The copolymers of the invention exhibit low polydispersity indices and low viscosities in solution and are readily soluble in an alkaline medium. | 06-09-2011 |
20110166282 | METHOD FOR PREPARING A POLYMER PARTICLE DISPERSION IN AN AQUEOUS MEDIUM - The invention relates to a process for the preparation of an aqueous dispersion of polymer particles in an aqueous medium employing a living macroinitiator requiring a reinitiation temperature of less than 100° C. | 07-07-2011 |
20120132843 | USE OF COMPOSITE MATERIALS BASED ON CARBON NANOTUBES AS THICKENING AGENTS FOR AQUEOUS SOLUTIONS - The present invention relates to the use of composite materials as thickening agents for aqueous solutions, said material comprising carbon nanotubes (CNTs) and at least one hydrophilic (co)polymers. The invention relates more particularly to the use of the materials described above as thickening agents n one of the fields chosen: from the following: the papermaking field, the oil field and also the fields of paint, water treatment, detergents, ceramics, cements, or hydraulic binders, civil engineering, inks and varnishes, and textile sizing. | 05-31-2012 |
20130338315 | FILAMENTOUS POLYMER PARTICLES AND METHOD FOR PREPARING SAME BY MEANS OF CONTROLLED RADICAL POLYMERISATION IN EMULSION - The invention relates to polymer particles in the form of filaments formed by block copolymers, as well as to the method for preparing same by means of controlled radical polymerization in emulsion in the presence of a specific living macroinitiator derived from a nitroxide. The invention is characterized in that the filamentous particles are obtained in a dispersed aqueous medium by means of the synthesis of said block copolymers, performed by heating the reaction medium at a temperature of 60 to 120° C., the final block copolymer containing between 10 and 50 mol. % of the macroinitiator which is water soluble and the hydrophobic monomer conversion rate being at least 50%. According to the invention, the weight ratio of hydrophilic fraction of the filamentous particles is less than 25 wt %. | 12-19-2013 |
20140039067 | FILAMENTOUS POLYMER PARTICLES AND USE THEREOF AS RHEOLOGY MODIFIERS - The invention relates to polymer particles in the form of filaments formed by block copolymers, as well as to the use thereof as rheology modifiers for aqueous or organic solutions. A first aspect of the invention relates to filamentous polymer particles having a length/diameter ratio greater than 100, said particles being formed by block copolymers synthesized by controlled radical emulsion polymerization in emulsion, performed using at least one hydrophobic monomer in the presence of a water-soluble marcoinitiator. The invention is characterized in that the filamentous particles are obtained in an aqueous medium for the synthesis of said block copolymers, performed by heating the reaction medium to a temperature of 60 to 120° C., the final block copolymer containing between 10 and 50 mol. % of the water-soluble macroinitiator and the hydrophobic monomer conversion rate being at least 50%. A second aspect of the invention relates to a method for modifying the rheology of an organic or aqueous solution using said filamentous polymer particle. | 02-06-2014 |
Patent application number | Description | Published |
20080317666 | Colonic Delivery of Active Agents - Drug delivery devices that are orally administered, and that release active ingredients in the colon, are disclosed. In one embodiment, the active ingredients are those that inactivate antibiotics, such as macrolides, quinolones and beta-lactam containing antibiotics. One example of a suitable active agent is an enzyme such as beta-lactamases. In another embodiment, the active agents are those that specifically treat colonic disorders, such as Chrohn's Disease, irritable bowel syndrome, ulcerative colitis, colorectal cancer or constipation. The drug delivery devices are in the form of beads of pectin, crosslinked with calcium and reticulated with polyethyleneimine. The high crosslink density of the polyethyleneimine is believed to stabilize the pectin beads for a sufficient amount of time such that a substantial amount of the active ingredients can be administered directly to the colon. Advantageously, the amount of polyethyleneimine is sufficient to allow a substantial portion of the pectin beads to pass through the gastrointestinal tract to the colon without releasing the active agent, and is also sufficient such that the pectin beads are sufficiently degraded in the colon to release an effective amount of the active agent. | 12-25-2008 |
20090130214 | Gemcitabine derivatives nanoparticles - The invention concerns a 2′,2′-difluoro-2′-deoxycytidine derivative of general formula (I), wherein: R | 05-21-2009 |
20090162339 | GALENIC FORMULATION FOR COLON-TARGETED DELIVERY OF ACTIVE INGREDIENTS - The invention concerns multiparticulate galenic formulations for oral administration and designed for colon targeted delivery of active principles selected from the group comprising enzymes capable of inactivating macrolides and the like, enzymes capable of inactivating quinolones and β-lactamases. | 06-25-2009 |
20100160249 | NANOPARTICLE DERIVATIVES OF GEMCITABINE - The use of squalenic acid or a derivative thereof in formulating at least one polar active principle with a molecular weight of 100 Da or more, in the form of nanoparticles, and pharmaceutical compositions thereof. | 06-24-2010 |
20100226991 | SOLID INORGANIC/ORGANIC HYBRID WITH MODIFIED SURFACE - The invention relates to solid organometallic hybrids with modified surface. Said solid may be used for example for the encapsulation and vectoring of molecules of interest such as active pharmaceutical agents, compounds of interest in cosmetics and markers, for example, contrast agents. Said solids show good results in terms of loading capacity in medicament agents and in biocompatibility. | 09-09-2010 |
20100305030 | NANOPARTICLES OF THERAPEUTIC AGENTS HAVING LOW WATER SOLUBILITY - The invention relates to a water-dispersible derivative of a therapeutic agent having a low water solubility that comprises at least one molecule of said agent covalently bonded to at least one molecule of a hydrocarbon derivative having a squalenic structure or the like. The invention further relates to corresponding nanoparticles. | 12-02-2010 |
20110184053 | NOVEL NUCLEIC ACID TRANSFER SYSTEM - The invention relates to a complex formed by at least one molecule of nucleic acid comprising between 10 and 40 nucleotides, covalently coupled to at least one hydrocarbon compound that is at least C | 07-28-2011 |
20110269731 | NANOPARTICLES OF BETA-LACTAM DERIVATIVES - The present invention relates to a complex made up of at least one beta-lactam molecule covalently bonded to at least one hydrocarbon radical including at least 18 carbon atoms and containing at least one unit of 2-methyl-buta-2-ene, to nanoparticles of said complexes, and to a method for preparing same, said complex and/or said nanoparticles optionally being in the form of a lyophilisate. The present invention also relates to a pharmaceutical composition including at least said complex and/or said nanoparticles. The invention finally relates to said complex and/or to said nanoparticles for the treatment and/or prevention of bacterial infections, in particular caused by strains that are sensitive to beta-lactams. | 11-03-2011 |
20110269830 | STATIN NANOPARTICLES - The present invention relates to a complex made up of at least one molecule of statin or a derivative thereof, covalently bonded to at least one hydrocarbon radical including at least 18 carbon atoms and containing at least one 2-methyl-buta-2-ene unit, to nanoparticles of such a complex, and to a method for preparing same, said complex and/or said nanoparticles optionally being in the form of a lyophilisate. The present invention also relates to a pharmaceutical composition including at least one complex and/or nanoparticles such as previously defined. The invention finally relates to said complex and/or to said nanoparticles for the treatment and/or prevention of hyperlipemia and hypercholesterolemia. | 11-03-2011 |
20120107252 | METHOD FOR FORMING CYCLODEXTRIN POLYMER AND LIPOPHILIC COMPOUND EMULSIONS, RESULTING EMULSIONS, AND COMPOSITIONS INCLUDING SAID EMULSIONS - The present invention relates to a method for preparing a cyclodextrin polymer and/or a hydrophilic polymer emulsion having cyclodextrins as well as lipophilic compounds, the emulsions having a remarkable stability. In particular, the method includes: (i) adding a lipophilic compound into an aqueous solution of a cyclodextrin unit polymer or hydrophilic polymer having cyclodextrins; (ii) forming an emulsion from the mixture resulting from step (i). The invention also relates to the resulting emulsions, i.e. stabilized emulsions by a non-covalent and non-crystalline inclusion complex consisting of (i) a cyclodextrin unit polymer or a hydrophilic polymer having cyclodextrins and (ii) a lipophilic compound. The invention also relates to the use of said emulsions in the cosmetic, pharmaceutical and/or agri-food fields. | 05-03-2012 |
20130261088 | NOVEL DERIVATIVES OF OXAZAPHOSPHORINES THAT ARE PRE-ACTIVATED, USE AND METHOD OF PREPARATION - The present invention relates to novel derivatives of oxazaphosphorines that are pre-activated, to the methods for preparing same, to the pharmaceutical compositions containing same and to the therapeutic use thereof, in particular for treating cancer. | 10-03-2013 |
20150037419 | Functional PLA-PEG Copolymers, the Nanoparticles Thereof, Their Preparation and Use for Targeted Drug Delivery and Imaging - Functional PLA-PEG copolymers, the nanoparticles thereof, their preparation and use for targeted drug delivery and imaging The present invention concerns novel functional PEG-PLA containing copolymers, the nanoparticles containing the same, their process of preparation and their use for site specific targeted drug delivery and imaging. | 02-05-2015 |
20150045426 | VITAMIN C COMPLEXES - A complex formed of at least one molecule of 5-(1,2-dihydroxy-ethyl)-3,4-dihydroxy-5H-furan-2-one or a derivative covalently bonded with at least one hydrocarbon radical with formula (A) as follows: wherein: •-m 1=1, 2, 3, 4, 5 or 6; •-m 2=0, 1, 2, 3, 4, 5 or 6; and represents the site of the bond with the molecule of 5-(1,2-dihydroxy-ethyl)-3,4-dihydroxy-5H-furan-2-one or derivative. Formula (I) | 02-12-2015 |