Patent application number | Description | Published |
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 |
20110207881 | AMPHIPHILIC BLOCK COPOLYMER AND METHOD FOR PREPARING SAME - The invention relates to an amphiphilic block copolymer, to the preparation thereof, and to the use thereof in the form of a self-stabilizing latex. The copolymer has the formula R | 08-25-2011 |
20110243864 | DISPERSION OF SOFT POLYMER PARTICLES, COSMETIC COMPOSITION COMPRISING IT AND COSMETIC TREATMENT METHOD - The present invention relates to a dispersion of polymer particles in a liquid carbon-based medium, the said particles having a flexible polymeric core and being surface-stabilized with a block stabilizing polymer comprising at least one block that is soluble in the said carbon-based medium and at least one block that is insoluble in the said carbon-based medium. | 10-06-2011 |
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 |
20140364558 | PROCESS FOR THE PREPARATION OF A VINYLIDENE CHLORIDE POLYMER - Process for the preparation of a vinylidene chloride polymer comprising polymerizing vinylidene chloride and optionally at least one ethylenically unsaturated monomer copolymerizable therewith under the control of a RAFT agent of formula (II). | 12-11-2014 |
Patent application number | Description | Published |
20090186547 | REINFORCING FIBER TEXTURE WITH MULTIPLE-SATIN WEAVING FOR A COMPOSITE MATERIAL PART - A reinforcing fiber texture for a composite material part is made by multi-layer three-dimensional weaving with a satin type weave or a multiple satin type weave. The texture comprises at least three layers of weft yarns T interlaced by warp yarns C, each warp yarn taking hold in alternation of one weft yarn in n from a first layer of weft yarns and of one weft yarn in n of a second layer of weft yarns adjacent to the first, the number n being an integer not less than 3. The paths of the warp yarns are similar and they are offset in the warp direction. | 07-23-2009 |
20090280707 | FIBER REINFORCING TEXTURE FOR MAKING A COMPOSITE MATERIAL PART - A fiber reinforcing texture ( | 11-12-2009 |
20100144227 | REINFORCING FIBROUS STRUCTURE FOR A COMPOSITE MATERIAL AND A PART CONTAINING SAID STRUCTURE - A woven fibrous structure embodied in one piece, used for producing a composite material part and comprising an internal part or a core ( | 06-10-2010 |
20110121109 | METHOD OF PRODUCING A NOZZLE OR A DIVERGENT NOZZLE ELEMENT MADE OF A COMPOSITE - A fiber preform obtained by conforming panels of fiber texture on a former having a surface that reproduces the shape desired for a surface of the nozzle or the nozzle divergent section that is to be made, and by bonding the panels together via their mutually contacting edges, and consolidated fiber reinforcement is formed by shaping the fiber preform impregnated with a consolidation composition comprising a resin, shaping being performed between the former and a jacket applied against the impregnated fiber preform so as to obtain consolidated fiber reinforcement having a fiber volume percentage of at least 35%, and having a thickness of no more than 5 mm over at least a major fraction of its axial dimension. The densification of the fiber reinforcement is continued by chemical vapor infiltration after pyrolyzing the resin so that once densified a part is obtained that has practically the shape and the wall thickness of the nozzle or the nozzle divergent section that is to be made. | 05-26-2011 |
20120301691 | LOW-THICKNESS THERMOSTRUCTURAL COMPOSITE MATERIAL PART, AND MANUFACTURE METHOD - A thermostructural composite material part including carbon or ceramic fiber reinforcement densified by a matrix having at least one thin portion in which: the thickness of the part is less than 2 mm, or indeed less than 1 mm; the fiber reinforcement is made as a single thickness of multilayer fabric made of spread yarns having a weight of not less than 200 tex; the fiber volume ratio lies in the range 25% to 45%; and the ratio between the number of layers of the multilayer fabric and the thickness in millimeters of the part is not less than four. | 11-29-2012 |
20150082589 | METHOD OF FABRICATING A COMPOSITE MATERIAL PART WITH IMPROVED INTRA-YARN DENSIFICATION - A method of fabricating a composite material part comprises fiber reinforcement densified by a matrix. The method comprises the following steps: making a fiber fabric by weaving yarns having an initial mean fiber percentage; and densifying the fiber fabric with a matrix. The fiber fabric is subjected, prior to densification, to one or more jets of water under pressure so as to reduce the mean fiber percentage in the fabric to a value lying in the range 20% to 45%. | 03-26-2015 |