Abstract: The invention relates to the use, particularly in an organic or inorganic material, of at least one pyrene derivative represented by the general formula (I), in which n represents an integer between 1 and 4, or one of the salts thereof, as an ultraviolet absorbing agent.

Abstract: The invention relates to a heat-transporting fluid and to the use thereof. The heat-transporting fluid of the invention is formed of an aqueous colloidal sol including water and up to 58.8 wt %, relative to the total fluid weight, in a-Al2O3 particles, the thickness of which is the smallest dimension and less than or equal to 30 nm 90% to 95% of said a-Al2O3 particles have a size less than or equal to 210 nm, among which 50% have a size less than or equal to 160 nm. The invention is of use in the field of cooling, in particular nuclear reactor backup cooling.

Abstract: The invention relates to a fire retardant product. The invention comprises using at least one aluminosilicated polymer of the imogolite type or allophane type as a fire retardant. The invention can particularly be used in the field of fire retardant products.

Abstract: The invention relates to the use of a metal organosilicate polymer as a dispersion-forming agent. The metal organosilicate polymer used in the invention has one of the following formulae I and II: R4Si4Al2O8(OH)x??Formula I: R8Si8M6O16(OH)y??Formula II: The invention finds application in the field of dispersions of hydrophobic compounds in water and of organophobic compounds in an organic solvent, in particular.

Abstract: A photovoltaic conversion device including an area for collecting photons provided by luminous radiation and an area for converting the photons into electrical energy, the collecting area and the converting area being distinct, a fluid loaded with photoluminescent particles being for flowing between the collecting area and the converting area, the particles collecting photons and conveying them to the converting area in which they are reemitted.

Abstract: A device intended to accomplish the deposition of particles of nanometric size on at least one part of the surface (4) of a substrate (2), including a first enclosure (14) intended to contain a liquid (8) charged with particles (6) of nanometric size, in which the first enclosure (14) is subject to a pressure higher than atmospheric pressure, and including means of heating (16) the said fluid able to raise the fluid to its boiling temperature, a second enclosure (20) pressurised at a pressure roughly equal to that of the first enclosure (14), inside which the deposition by boiling occurs, in which means of heating (24) are provided to heat at least a part of the surface (4) of the substrate (2), and in which the first enclosure (14) is connected to the second enclosure (20) to allow the second enclosure (20) to be supplied with the fluid raised roughly to its boiling temperature.

Abstract: A composition including: a dispersion of particles of at least one oxide of at least one luminescent rare earth, disaggregated and stabilized in a hydrophobic liquid medium to which at least one surfactant is added, in which said surfactant is a non-ionic surfactant having an HLB (hydrophilic-to-lipophilic balance) lower than 12.

Abstract: In the invention, use is made of at least one metal organosilicate polymer, in the form of particles, having one of the following formulae I and II: R4Si4Al2O8(OH)x,??Formula I: R8Si8M6O16(OH)y,??Formula II: for the protection from oxidation and/or electromagnetic radiation of a compound sensitive to oxidation and/or to electromagnetic radiation. The invention finds application in particular in the field of the protection from oxidation and photoaging of various materials.

Abstract: The invention relates to a fire retardant product. The invention comprises using at least one aluminosilicated polymer of the imogolite type or allophane type as a fire retardant. The invention can particularly be used in the field of fire retardant products.

Abstract: The present invention relates to a process for preparing a porous silica particle comprising a step that consists in preparing a silica particle comprising a water-soluble pore-forming agent then in removing said pore-forming agent by dissolution. It also relates to the porous silica particles capable of being prepared by this process and to their various uses and applications.

Abstract: Dispersion of particles of at least one oxide of at least one luminescent rare earth, disaggregated and stabilized in a hydrophobic liquid medium containing at least one surfactant, in which the said surfactant is a non-ionic surfactant having an HLB (hydrophilic-to-lipophilic balance) lower than 12. Method for preparing the dispersion. Varnish comprising the said disaggregated, stabilized and dispersed particles, and its method of preparation. Method for making substrates with the said varnish and substrate thereby marked. Method for identifying objects provided with a marking using the said varnish.

Abstract: The invention relates to the use of a metal organosilicate polymer as a dispersion-forming agent. The metal organosilicate polymer used in the invention has one of the following formulae I and II: R4Si4Al2O8(OH)x??Formula I R8Si8M6O16(OH)y??Formula II The invention finds application in the field of dispersions of hydrophobic compounds in water and of organophobic compounds in an organic solvent, in particular.

Abstract: In the invention, use is made of at least one metal organosilicate polymer, in the form of particles, having one of the following formulae I and II: R4Si4Al2O8(OH)x, ??Formula I: R8Si8M6O16(OH)y, ??Formula II: for the protection from oxidation and/or electromagnetic radiation of a compound sensitive to oxidation and/or to electromagnetic radiation. The invention finds application in particular in the field of the protection from oxidation and photoaging of various materials.

Abstract: The invention relates to a process for destroying or inhibiting growth of micro-organisms on living tissues, comprising applying an antiseptic agent comprising a dispersion of a transition metal in an imogolite and/or allophane-like matrix to living tissue.

Abstract: The present invention relates to an inkjet recording element having good stability to ozone and to light. Said recording element comprises a support and at least one inkreceiving layer, said ink-receiving layer including particles of boehmite in filament form.

Abstract: The invention relates to a single-use detector of aromatic compounds, with:—a first part (20) comprising a light conversion layer (26), and a photosensitive layer (28) in one piece with the light conversion layer, to be capable of being exposed by exposure light (54) capable of being produced by the light conversion layer in response to excitation light (50), the light conversion layer containing an imprinted polymer precursor (32), capable of combining with a target aromatic compound to form a dye (34) that converts the excitation light into exposure light in a wavelength domain different from that of the exposure light and,—a second part (40) of developer, capable of being applied temporarily to the photosensitive layer (28) of the first part (20) to demonstrate a possible exposure of the photosensitive layer. Application to the detection of explosives.

Abstract: The present invention relates to an inkjet recording element having very good stability to ozone and to light. Said recording element comprises a support and at least one ink receiving layer, said ink-receiving layer comprising at least one amorphous silica polymer having a degree of condensation between 75% and 88%. Such a polymer can be obtained by sol-gel pathway in acid catalytic conditions from silicon alcoxides.

Abstract: The present invention relates to an inkjet recording element having good dye keeping properties in time and good image quality. Said inkjet recording element comprises a porous polyester support and at least one ink-receiving layer, said ink-receiving layer comprising at least one hydrosoluble binder and at least one aluminosilicate polymer obtainable by a preparation method consisting in treating an aluminum halide with an alkyl orthosilicate only having hydrolyzable functions with an aqueous alkali in the presence of silanol groups, the aluminum concentration being maintained less than 0.3 mol/l, the Al/Si molar ratio being maintained between 1 and 3.6 and the alkali/Al molar ratio being maintained between 2.3 and 3; and then stirring the resulting mixture at ambient temperature in the presence of silanol groups for long enough to form the aluminosilicate polymer.

Abstract: The present invention relates to a recording element intended for forming images by inkjet printing having very good colorfastness over time and a good ink drying time. Said recording element comprises a support and at least one ink-receiving layer, said ink-receiving layer comprising at least one hydrosoluble binder and at least one aluminosilicate polymer capable of being obtained according to a preparation method consisting in treating an aluminum halide with an alkyl orthosilicate only having hydrolyzable functions with an aqueous alkali in the presence of silanol groups, the aluminum concentration being maintained at less than 0.3 mol/l, the Al/Si molar ratio being maintained between 1 and 3.6 and the alkali/Al molar ratio being maintained between 2.

Abstract: The present invention relates to an inkjet recording element having good dye keeping properties in time, good image quality, as well as instant dryness. Said inkjet recording element comprises a porous polyester support and at least one ink-receiving layer, said ink-receiving layer comprising at least one aluminosilicate polymer obtainable by a preparation method consisting in treating an aluminum halide with a mixture of at least one silicon alkoxide only having hydrolyzable substituents and at least one silicon alkoxide having a non-hydrolyzable substituent, with an aqueous alkali in the presence of silanol groups, the aluminum concentration being maintained less than 0.3 mol/l, the Al/Si molar ratio being maintained between 1 and 3.6 and the alkali/Al molar ratio being maintained between 2.3 and 3; and then stirring the resulting mixture at ambient temperature in the presence of silanol groups for long enough to form the hybrid aluminosilicate polymer.