Abstract: Method used to protect a thermoplastic polymer consisting of superposing a protective layer (I) comprising an acrylic copolymer comprising, by weight (the total making 100%): from 80 to 99.8% of methyl methacrylate (MMA), from 0 to 20% of at least one comonomer that can be copolymerized with MMA by a radicalar method, and from 0.2 to 10% of maleic anhydride or 15% of acrylic and/or methacrylic acid and possibly anhydride groups with a formula: in which R1 and R2 denote H or a methyl radical, a layer of at least one thermoplastic polymer (II), all these steps being performed in order by coextrusion, by hot compression or by multi-injection.

Abstract: A formulation is described in the form of a solid-liquid dispersion for the manufacture of a cathode, comprising a liquid-phase solvent, a sulfur-carbon composite in the form of particles with a median diameter D50 of less than 50 ?m, and less than 10% by number of the particles of the dispersion are particles of sulfur in elemental form.

Abstract: An agglomerated solid material comprising loose carbon nanotubes and that is free from organic compounds is described, as well as the method of preparation thereof, and uses thereof, where the agglomerated solid material consists of a continuous network of carbon nanotubes comprising aggregates of carbon nanotubes with an average size d50 under 5 ?m, in a proportion below 60% by area, determined by image analysis by electron microscopy and has an apparent density between 0.01 g/cm3 and 2 g/cm3.

Abstract: A method for the manufacture of a paste composition suitable for the production of an electrode for lead-acid battery, including mixing a carbon nanofiller/lead oxide composite of a first particulate size with sulphuric acid, water and further lead oxide of a second particulate size. Also, the paste thus obtained, the composite used in its manufacture, and the electrode and lead-acid battery obtained from this paste.

Abstract: A composite material containing a polymer composition and a very low concentration of carbon nanofillers, in particular carbon nanotubes, having improved mechanical properties. The method for producing said composite material and to the different uses thereof. The use of carbon nanofillers at a concentration of between 0.1 ppm and 99 ppm in order to improve mechanical properties, in particular the tensile properties of a polymer matrix encasing at least one polymer selected from a thermoplastic polymer alone or mixed with an elastomer resin base, while facilitating the shaping thereof into composite parts using any suitable technique, in particular injection, extrusion, compression or molding, and while improving the electrostatic dissipation capability thereof.

Abstract: The present invention relates to the field of lead batteries. More particularly, the present invention relates to the use, in the preparation of a lead battery electrode formulation, of a liquid composition, stable over time, comprising from 0.2% to 10% by weight, preferably from 0.2% to 5% by weight, of carbon-based nanofillers, at least one water-soluble polymer and at least one cationic component chosen from alkali metal or alkaline earth metal cations and ammonium ions dispersed in a liquid medium. Another subject-matter of the invention is a lead battery electrode obtained by using the said composition.

Abstract: The use of very low concentrations of carbon nanofillers selected from among carbon nanotubes, carbon nanofibers, graphene or a mixture of same in any proportions, in order to improve resistance to ageing, in particular protection against ultraviolet (UV) light, of a composite material based on a polymer matrix. A composite product comprising a composite material, the composite material stabilized with respect to UV light using a content of between 1 ppm and 0.1% by weight, of carbon-based nanofillers chosen from carbon nanotubes, carbon nanofibers, graphene or a mixture of these in all proportions, wherein the composite product is selected from yarns, films, tubes, fibers, and nonwovens.

Abstract: The invention relates to the field of lead batteries. More particularly, it relates to a solid composition comprising between 5 and 60 wt. % of carbon nanofillers, preferably carbon nanotubes, dispersed homogeneously in a hydrosoluble polymer in the presence of at least one cationic component selected from alkali or alkaline-earth metal cations and ammonium ions. The invention also relates to the use of said composition for producing lead battery electrode formulations.

Abstract: The present invention relates to photobioreactors and more particularly to the use of a transparent composition based on at least one methacrylic polymer for constructing installations for the culture of photosensitive organisms. This composition can be in the form of films, plates, profiled elements or cylinders such as tubes. The invention also relates to a transparent multilayer structure comprising at least one layer of a methacrylic polymer and one layer comprising at least one antifouling additive, and to the use thereof for constructing installations for the culture of photosensitive organisms.

Abstract: The present invention relates to photobioreactors and more particularly to the use of a transparent composition based on at least one methacrylic polymer for constructing installations for the culture of photosensitive organisms. This composition can be in the form of films, plates, profiled elements or cylinders such as tubes. The invention also relates to a transparent multilayer structure comprising at least one layer of a methacrylic polymer and one layer comprising at least one antifouling additive, and to the use thereof for constructing installations for the culture of photosensitive organisms.

Abstract: A method for the manufacture of a paste composition suitable for the production of an electrode for lead-acid battery, including mixing a carbon nanofiller/lead oxide composite of a first particulate size with sulphuric acid, water and further lead oxide of a second particulate size. Also, the paste thus obtained, the composite used in its manufacture, and the electrode and lead-acid battery obtained from this paste.

Abstract: A process for manufacturing a pre-impregnated fibrous material, including a step of impregnation of said fibrous material with a matrix being of a thermoplastic polymer in the molten state. This process is characterized in that, prior to the impregnation step, an insertion step of incorporating, into said impregnating thermoplastic polymer, a lubricant including at least one oligomer chosen from oligomers of a cyclic ester, oligomers of a cyclic ether and oligomers of an organomineral compound. This oligomer makes it possible to lubricate the thermoplastic polymer, to promote wetting of the fibres of the fibrous material, and therefore to notably improve the impregnation of the fibrous material.

Abstract: A composite material containing a polymer composition and a very low concentration of carbon nanofillers, in particular carbon nanotubes, having improved mechanical properties. The method for producing said composite material and to the different uses thereof. The use of carbon nanofillers at a concentration of between 0.1 ppm and 99 ppm in order to improve mechanical properties, in particular the tensile properties of a polymer matrix encasing at least one polymer selected from a thermoplastic polymer alone or mixed with an elastomer resin base, while facilitating the shaping thereof into composite parts using any suitable technique, in particular injection, extrusion, compression or moulding, and while improving the electrostatic dissipation capability thereof.

Abstract: A composite material including, in a polymeric composition, carbon nanotubes combined with particles having an elastomeric core and at least one thermoplastic shell. The composite material including, in a polymer composition, carbon nanotubes associated, so as to form aggregations of less than 30 ?m, with particles having a core made of totally or partially crosslinked elastomer and at least one thermoplastic shell, in a weight ratio of the particles of core-shell structure to the nanotubes of between 0.5:1 and 2.5:1. Also, a method for preparing said material, as well as to the use thereof for imparting various properties to polymeric matrices.

Abstract: The invention relates to a methacrylic composition comprising (100-x-y) parts of at least one methacrylic polymer comprising a MMA homo- or copolymer containing dispersed therein: x parts of particles of a thermoplastic polymer A containing MMA as a majority monomer which is crosslinked or has a weight-average mass Mw>300,000 g/mol, (in relation to a PMMA standard), with a weight-average diameter (ASTM D1921)>100 ?m, and <500 ?m; and y parts of particles of a crosslinked thermoplastic polymer comprising MMA as a majority monomer, with a weight-average diameter (ASTM D1921) ranging from 15 to 70 ?m; such that x varies between 2 to 20 and y varies between 10 to 25. Preferably, x+y<33. The invention also relates to a multilayer structure consisting of: a layer (I) comprising the inventive methacrylic composition; a layer (II) comprising at least one thermoplastic polymer, and an optional intermediate layer between layers (I) and (II).

Abstract: The present invention relates to photobioreactors and more particularly to the use of a transparent composition based on at least one methacrylic polymer for constructing installations for the culture of photosensitive organisms. This composition can be in the form of films, plates, profiled elements or cylinders such as tubes. The invention also relates to a transparent multilayer structure comprising at least one layer of a methacrylic polymer and one layer comprising at least one antifouling additive, and to the use thereof for constructing installations for the culture of photosensitive organisms.

Abstract: The invention relates to a methacrylic composition comprising (100-x-y) parts of at least one methacrylic polymer that is a homopolymer or copolymer of MMA, dispersed in which are: x parts of particles of a thermoplastic polymer A comprising MMA as the main monomer that is either crosslinked or that has a weight-average molecular weight Mw>300 000 g/mol, advantageously >400 000 g/mol (relative to a PMMA standard), with a weight-average diameter (ASTM D1921)>100 ?m, advantageously >250 ?m and <500 ?m, advantageously <400 ?m; y parts of particles of a crosslinked thermoplastic polymer B comprising MMA as the main monomer, with a weight-average diameter (ASTM D1921) ranging from 15 to 70 ?m; such that x varies from 2 to 20 and y varies from 10 to 25. Preferably, x+y<33.

Abstract: Method for protecting a thermoplastic polymer comprising superposing, in this order, by coextrusion, by hot compression molding or by multi-injection molding: a protective layer (I) comprising an acrylic copolymer comprising, by weight (the total making 100%): from 80 to 99.8% of methyl methacrylate (MMA), from 0 to 20% of at least one comonomer radically copolymerizable with MMA, and from 0.2 to 10%: of maleic anhydride or of acrylic and/or methacrylic acid and optionally of anhydride groups formula: of in which R1 and R2 denote H or a methyl radical, a layer of at least one thermoplastic polymer (II).

Abstract: The invention relates to a flame-retardant methacrylic composition based on a methacrylic polymer comprising, per 100 parts of methacrylic polymer, from 15 to 25 parts, advantageously from 17 to 25 parts, preferably from 17 to 23 parts, more preferentially still from 19 to 22 parts, of at least one flame-retardant agent of formula (I) or (II): in which: R1 and R2 denote linear or branched C1-C6 alkyl groups and/or aryl groups; R3 denotes a linear or branched C1-C10 alkylene group, a C6-C10 arylene group, an alkylarylene group or an arylalkylene group; M denotes Mg, Ca, Al, Sb, Sn, Ge, Ti, Zn, Fe, Zr, Ce, Bi, Sr, Mn, Li, Na or K; m is an integer between 1 and 4; n is an integer between 1 and 4; x is an integer between 1 and 4.

Abstract: The invention relates to compositions for flame-retardant cast panels made of (meth)acrylic polymers.The composition comprises at least one (meth)acrylic ester monomer, (meth)acrylic acid and at least one phosphorus compound which is anhydrous and is chosen from phosphoric acids, phosphoric acid esters or their mixtures, optionally in combination with an optionally halogenated neutral phosphoric ester. The amount of (meth)acrylic acid and of phosphorus compound, by weight with respect to the total mixture constituting the composition, is such that the flame-retardancy coefficient FRC: ##EQU1## is greater than 0.95.