Abstract: The disclosure relates to a method for operating a supercharged internal combustion engine having at least one cylinder group with a number n of combustion chambers, wherein, during a first operating state, all n combustion chambers are supplied with combustion air via a primary charge air path and, during a second operating state, only a portion of the n combustion chambers are supplied with combustion air from the primary charge air path and another portion of the n combustion chambers are supplied with combustion air from a separate compressed air reservoir.

Abstract: The disclosure relates to a method for operating a supercharged internal combustion engine having at least one cylinder group with a number n of combustion chambers, wherein, during a first operating state, all n combustion chambers are supplied with combustion air via a primary charge air path and, during a second operating state, only a portion of the n combustion chambers are supplied with combustion air from the primary charge air path and another portion of the n combustion chambers are supplied with combustion air from a separate compressed air reservoir.

Abstract: The invention relates to an engine having at least two combustion chambers, a shared high-pressure fuel storage tank for holding fuel gas available as pressurized gas, and means for direct injection of the fuel gas from the high-pressure fuel storage tank into the combustion chambers, wherein it is possible to provide the fuel gas in the high-pressure fuel storage tank from a primary tank, wherein it is possible to withdraw the fuel gas from the primary tank and/or to generate it from a fuel withdrawn from the primary tank along a conversion path, and a gas buffer storage tank connected to the high-pressure fuel storage tank discharges fuel gas from the high-pressure fuel storage tank into the gas buffer storage tank, and the gas buffer storage tank is further connected via a separate fuel gas path to the air intake section of the gas combustion engine.

Abstract: A natural fiber polymer composite precursor pellet comprising, a thermoplastic polymer coupling agent as a binder and a natural fiber, wherein the natural fiber is a bleached chemical pulp and is comprised in an amount of at least 88 weight %, and wherein the thermoplastic polymer coupling agent is comprised in an amount of between 8 and 12 weight %, preferably between 9 and 11 weight %, based on the weight of the pellet.

Abstract: The disclosure relates to a method for operating a supercharged internal combustion engine having at least one cylinder group with a number n of combustion chambers, wherein, during a first operating state, all n combustion chambers are supplied with combustion air via a primary charge air path and, during a second operating state, only a portion of the n combustion chambers are supplied with combustion air from the primary charge air path and another portion of the n combustion chambers are supplied with combustion air from a separate compressed air reservoir.

Abstract: The disclosure relates to a method for operating an internal combustion engine comprising at least two cylinders and a system for fuel injection, in which the fuel is withdrawn from a primary tank and supplied to at least one rail in a form significantly compressed compared with atmospheric pressure, and a plurality of cylinders draw the gaseous fuel from a rail used collectively, wherein, during operation of the internal combustion engine, the pressure target value of the gaseous fuel stored in the rail is controlled to or otherwise held at a constant value or a variable target value, which changes only in a small range B, irrespective of the engine operating point.

Abstract: The invention relates to an injection-molding composition comprising at least one polyolefin, at least one delignified wood pulp fiber, at least one maleic anhydride-grafted polyolefin and at least one metal oxide chosen from oxides of alkaline earth metals or of zinc.

Abstract: The present invention concerns a fireproof composition consisting of reticulated polysiloxane and raw carbon nanotubes with a “bound rubber” value greater than or equal to 15 grams of carbon nanotube, said carbon nanotubes representing between 0.05 and 1% of the total weight of said composition.

Abstract: The process of obtaining a polylactide-urethane copolymer is described which includes contacting an ?, ? dihydroxyl polylactide prepolymer of general formula I wherein X is NH or O, R is an alkyl or an aryl group, n and n? are integer numbers which are substantially the same and are in the range from 20 to 140, with a diisocyanate compound of general formula II O?C?N—R?—N?C?O wherein R? is an alkyl or an aryl group and with an amine or an alcohol of general formula III R?X?]2 wherein R? is an alkyl or an aryl group and X? is NH2 or OH, and with the proviso that at least one of R or R? is an aryl group.

Abstract: The present invention relates an organic liquid composition comprising a mixture of a first polymer with a linear polymeric chain having two photoactive groups as endgroup; and a second polymer with a multifunctional polymeric chain having at least three photoactive groups, that can reversibly and repeatedly crosslink to form a solid polymer network wherein said liquid composition been crosslinked by irradiation with at least one wavelength L1 and been uncrosslinked at least locally by irradiating the network with at least one other wavelength L2 in order to repeatedly adjust shape and optical properties of said composition in its crosslinked state. The composition is applicable as a starting material for intraocular lenses and for other lenses and optical elements.

Abstract: A polylactide-based polymer or copolymer (PLA) compositions with improved flame retardancy properties as obtained by conventional melt-blending of PLA polyester matrix (1) with both calcium sulfate (2) and organo-modified layered silicates (OMLS) (3). Combination of CaSO4 and OMLS exhibits synergistic effects on PLA flame retardancy by both significantly increasing the time to ignition and decreasing the heat release rate per unit area, and promoting non-dripping properties. Moreover, all other properties of PLA remain almost unchanged or are improved as regards to pristine PLA, especially thermal and mechanical properties.

Abstract: This invention relates to a method for producing carbon nanotubes in a dispersed state. The method comprises a stage whereby polymerization is carried out from at least one so-called monomer of interest, in the presence of a catalytic system. The catalytic system comprises a co-catalyst/catalyst catalytic couple that is supported by a catalyst carrier, which corresponds to said carbon nanotubes. The invention also relates to composite materials obtained by said method, and to a catalytic system for implementing said method. The invention further relates to the use of the inventive method and products in a field of polymers, especially that of nanotechnologies.

Abstract: The invention relates to a method for making a fireproof polymer foam, and to a fireproof polymer foam containing a mixture of a polymer composition containing one or more optionally-substituted, sequenced or random, thermoplastic and/or elastomer homopolymers, copolymers or mixtures thereof, from 0.05 to 10 wt %, preferably from 0.5 to 5 wt %, relative to the mixture, of carbon nanotubes, and from 0.05 to 15 wt %, preferably from 0.5 to 10 wt %, relative to the mixture, of red phosphorus.

Abstract: A polylactide-based polymer or copolymer (PLA) compositions with improved flame retardancy properties as obtained by conventional melt-blending of PLA polyester matrix (1) with both calcium sulfate (2) and organo-modified layered silicates (OMLS) (3). Combination of CaSO4 and OMLS exhibits synergistic effects on PLA flame retardancy by both significantly increasing the time to ignition and decreasing the heat release rate per unit area, and promoting non-dripping properties. Moreover, all other properties of PLA remain almost unchanged or are improved as regards to pristine PLA, especially thermal and mechanical properties.

Abstract: A process for producing polylactide-urethane copolymers, which comprises the step of contacting a polylactide having terminal hydroxyl groups, produced by contacting at least one lactide monomer with a diol or diamine, with a diisocyanate compound optionally in the presence of a second diol or diamine in the presence of a catalytic system under polymerisation conditions characterised in that the polylactide and the polylactide-urethane copolymers are produced by reactive extrusion.

Abstract: A polylactide-urethane copolymer obtainable by a process, which comprises the step of contacting: an ?, ? dihydroxyl polylactide prepolymer of general formula I wherein: X is NH or O, R is an alkyl or an aryl group, n and n? are integer numbers which are substantially the same and which are comprised in the range from 20 to 140, a diisocyanate compound of general formula II O?C?N—R?—N?C?O wherein: R? is an alkyl or an aryl group and an amine or an alcohol of general formula III R??[X?]2 wherein: R? is an alkyl or an aryl group and X? is NH2 or OH with the proviso that at least one of R or R? is an aryl group

Abstract: This invention relates to a method for producing carbon nanotubes in a dispersed state. The method comprises a stage whereby polymerization is carried out from at least one so-called monomer of interest, in the presence of a catalytic system. The catalytic system comprises a co-catalyst/catalyst catalytic couple that is supported by a catalyst carrier, which corresponds to said carbon nanotubes. The invention also relates to composite materials obtained by said method, and to a catalytic system for implementing said method. The invention further relates to the use of the inventive method and products in a field of polymers, especially that of nanotechnologies.

Abstract: The invention relates to a method for producing carbon nanotubes in a dispersed state. The method comprises a stage whereby polymerization is carried out from at least one so-called monomer of interest, in the presence of a catalytic system. The catalytic system comprises a cocatalyst/catalyst catalytic couple that is supported by a catalyst carrier, which corresponds to said carbon nanotubes. The invention also relates to composite materials obtained by said method, and to a catalytic system for implementing said method. The invention further relates to the use of the inventive method and products in the field of polymers, especially that of nanotechnologies.

Abstract: The present invention concerns a fireproof composition consisting of reticulated polysiloxane and raw carbon nanotubes with a “bound rubber” value greater than or equal to 15 grams of carbon nanotube, said carbon nanotubes representing between 0.05 and 1% of the total weight of said composition.

Abstract: The invention concerns a method for dispersing carbon nanotubes in a polymer matrix including a step of preparing carbon nanotubes coated with a polymer coating by a method for polymerizing a monomer using a catalytic system wherein carbon nanotubes are used as catalytic support, the carbon nanotubes comprising in surface the catalytic system for polymerizing the coating polymer, and the coating polymer being non-miscible in the host polymer matrix, followed by a step of hot process mixing of the coated carbon nanotubes with a polymer matrix.