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 |