Abstract: The present invention relates to a process for drying methyl mercaptan, notably by azeotropic distillation, comprising the following steps: 1) a stream (A) comprising methyl mercaptan and water is introduced into a distillation column (1); 2) said stream (A) is distilled in said column (1); 3) the distillate (B) is recovered in gaseous form, preferably at the top of the column; 4) the distillate (B) is condensed, preferably in a condenser (2), so as to obtain a condensate (C) in liquid form; 5) said condensate (C) is separated, preferably using a decanter (3), so as to obtain two separate liquid phases: an aqueous phase (D); and an organic phase (E) comprising methyl mercaptan; 6) all or part of the organic phase (E) is optionally introduced into the distillation column (1) as reflux; and 7) a stream (F) comprising the dried methyl mercaptan is recovered, preferably at the bottom of column (1).

Abstract: The invention relates to a method for separation of a polymeric article comprising at least one thermoplastic polymer, and at least one other constituent, wherein said separation method comprises: —a step of contacting the polymeric article with a liquid medium suitable for propagating shock waves, and —a step of applying a pulsed field to the liquid medium, so as to generate shock waves capable of dividing the polymeric article at an interface between the thermoplastic polymer and the other constituent.

Abstract: The present invention relates to a composition for battery electrodes in which at least one solvent is a composition comprising between 80% and 95% by mass of N-methylpyrrolidone (NMP).

Abstract: The present invention concerns a method for sulfhydrolysis from dialkyl sulfides and hydrogen sulfide, in the presence of a specific catalyst based on titanium dioxide and/or zirconium dioxide, as well as the corresponding use of such a catalyst. The present invention also concerns a method for preparing mercaptans, in particular methyl mercaptan, from at least one alcohol and hydrogen sulfide, comprising said sulfhydrolysis method.

Abstract: A transparent molding composition including, by weight (with a total of 100%): (A) 35 to 84% of a polyamide mixture including: 10 to 95% by weight of at least one semi-crystalline aliphatic polyamide, whose average number of carbon atoms relative to nitrogen atoms is greater than or equal to 8; 90 to 5% by weight of at least one amorphous polyamide; (B) from over 10 to 30% of at least one impact modifier; (C) from 6 to 20% of short glass fibers; (D) 0 to 10% of at least one prepolymer; and (E) 0 to 5% of at least one additive selected from stabilizers, dyes, plasticizers, processing aids or a mixture thereof, the index of refraction of each constituent (A), (B), (C) and (D) being included between 1.500 and 1.540, and wherein said composition has no PEBA and has a dry-measured modulus at 23° C. over 1700 MPa.

Abstract: The present invention relates to a liquid composition comprising a monomer, a (meth)acrylic polymer and at least three initiators. In particular the present invention relates to a liquid composition comprising a monomer, a (meth)acrylic polymer and at least three initiators that have a different half life time. That liquid composition can be used as a syrup and especially as a syrup for impregnation of fibres or fibrous material. Also concerned is a thermoplastic material obtained after polymerization of the liquid composition. The invention also relates to a process for manufacturing such a liquid composition. The invention also relates to a process for impregnating a fibrous substrate of long fibres with said liquid composition. The invention also relates to a fibrous substrate impregnated with said liquid composition which is useful for manufacturing composite parts.

Abstract: A process for transfer imprinting using a novel family of anti-sticking layers, such as for nanoimprint lithography processes, is described.

Abstract: The present invention relates to a non-crosslinked block copolymer foam composition, characterised in that it is in the form of a polymer matrix comprising closed cells containing gas, said matrix comprising: from 90 to 99.9% by weight of said block copolymer; and from 0.01 to 10% by weight of metal carbonate, for the total weight of the foam composition. The present invention also relates to a foamable composition and a method for manufacturing said foam, as well as the use of the foam in sports shoe soles, balloons or balls, gloves, personal protection equipment, rail soles, automobile parts, construction parts, electrical and electronic equipment parts, audio equipment, sound- and/or heat-proofing, and parts used to damp vibrations.

Abstract: The present invention relates to a process for producing methyl mercaptan, comprising the following steps: A) methanol is reacted with hydrogen sulfide to form a stream (M), preferably in gaseous form, comprising methyl mercaptan, unreacted H2S and possibly sulfur byproducts; B) optionally, said stream (M) is condensed; C) at least one step of purification of said stream (M) is performed to obtain a stream enriched in methyl mercaptan; D) the gaseous vents resulting from said at least one purification step are recovered, said gaseous vents comprising at least one sulfur compound, preferably H2S; E) a gas-liquid extraction of said at least one sulfur compound, preferably H2S, is performed with liquid methanol so as to obtain a liquid methanol enriched in sulfur compound(s), preferably in H2S; and F) optionally, said enriched methanol is used as reagent for the reaction of step A).

Abstract: The present invention relates to a method for continuously preparing a polyamide prepolymer, the viscosity in solution of which is comprised between 0.25 dL/g and 0.70 dL/g, as measured according to ISO 307:2007 in m-cresol at 20° C., the method being characterized in that it comprises a step of polycondensation on the basis of one or more polyamide precursor monomers, said polycondensation step being carried out in a extruder comprising at least two co-rotating conveying screws, the at least one monomer being previously added therein in solid or liquid form without being dissolved in a solvent or in water, and said polycondensation step being carried out without extracting the water formed during said polycondensation.

Abstract: The invention relates to a composition comprising a blend of fluorinated electroactive polymers and having a dielectric permittivity that exhibits greater stability over the operating temperature range with respect to each polymer employed on its own. The invention also relates to formulations and films produced on the basis of said composition. The invention also relates to a field-effect transistor, at least part of the dielectric layer of which is composed of a blend of fluorinated electroactive polymers.

Abstract: The invention relates to a crosslinkable prepolymer composition for use as a contrast layer. It also relates to a method for structuring an interface material. This method is characterized in particular by the following steps: depositing, on a block copolymer film, a prepolymer composition layer comprising a plurality of functional monomers and at least one crosslinkable functional group within its polymer chain and, on the other hand, two chemically different crosslinking agents, each agent being capable of initiating the crosslinking of said prepolymer in response to a stimulation specific thereto, subjecting the stack to a first stimulation localized on first areas, so as to cause a crosslinking reaction of the molecular chains of said prepolymer, and subjecting the stack to a second stimulation, so as to cause crosslinking of the molecular chains of said prepolymer by the action of said second crosslinking agent in secondary areas.

Abstract: A transparent molding composition, including by weight: (a) from 30 to 90% of at least one (co)polyamide of formula PACMY/Z, (b) from 10 to 70% by weight of at least one semi-crystalline copolyamide of formula A/WS, (c) from 0 to 10% of at least one impact modifier chosen from the polyether block amides (PEBA) and the core-shell polymers, (d) from 0 to 2% by weight of at least one additive, (e) from 0 to 5% by weight of a prepolymer; the sum of the proportions of each constituent of said composition being equal to 100%, the composition having good alcohol resistance as determined by an ethanol resistance test.

Abstract: The present invention relates to a process for synthesizing a functionalized mercaptan, comprising the reaction between a compound of formula R2—X—C*H(NR1R7)—(CH2)n-G (II) and H2S in the presence of at least one enzyme chosen from sulfhydrylases; said reaction being performed in a reactor with a partial pressure of H2S in the gas headspace of said reactor of between 0.01 and 4 bar, preferably between 0.1 and 3 bar, for example between 0.1 and 2.5 bar, and more preferentially between 0.25 and 2 bar, at the reaction temperature.

Abstract: A multilayer structure which is chosen from among a tank, a pipe or a tube and intended for transporting, distributing or storing liquid hydrogen, the structure including a sealing layer in contact with the liquid hydrogen, the sealing layer including a composition which includes a polymer P1 which is polychlorotrifluoroethylene and at least one second layer located above the sealing layer, the second layer being a composite reinforcing layer of a fibrous material in the form of continuous fibers impregnated with a composition mainly including at least one thermoplastic or thermosetting polymer P2.

Abstract: A method for continuously preparing a formulated polyamide prepolymer, of which the solution viscosity is from 0.25 dL/g to 0.70 dL/g, as measured according to ISO 307:2007 in m-cresol at 20° C., the method including a step of polycondensation on the basis of one or more polyamide precursor monomers, said polycondensation step being carried out in an extruder comprising at least two co-rotating conveying screws, the at least one monomer being previously fed therein in solid or liquid form without being dissolved in a solvent or in water, and said polycondensation step being carried out without extraction of the water formed during said polycondensation step and comprising the addition of at least one additive during said polycondensation step in the extruder.

Abstract: A molding composition including by weight: (A) 45% to 90%, particularly 60% to 80%, more particularly 62.5% to 77.5% of at least one copolyamide with amide units (Bal) and polyether units (Ba2), (B) 5% to 30%, particularly 10% to 20%, more particularly 12.5% to 17.5% of carbon fibers, (C) 5% to 20%, particularly 10% to 15% of a hollow glass reinforcement, (D) 0% to 5%, preferably 0.1% to 2% of at least one additive, the sum of the proportions of each constituent (A)+(B)+(C)+(D) of the composition being equal to 100%.

Abstract: A method is disclosed for us in additively manufacturing a three-dimensional carbon-bonded composite article. The method may include discharging from a print head a curable composition. The curable composition may include a) at least one aromatic, actinically curable component having an H/Catomic ratio of from 0.4 to 1.6, selected from the group consisting of (meth)acrylate oligomers, epoxy-functionalized compounds, oxetane-functionalized compounds and mixtures thereof; and b) at least one diluent comprising at least one actinically curable monomer. The curable composition may also include c) a reinforcement, and d) a photoinitiator. The method may further include irradiating the curable composition during the discharging to at least partially actinically cure the curable composition and form a preform of the three-dimensional carbon-bonded composite article. The method also includes pyrolyzing the preform to form the three-dimensional printed carbon-bonded composite article.

Abstract: A lamp for a photochemical reactor, including: a support member made of a material having a thermal conductivity greater than or equal to 100W/mK at 20° C. and including at least one channel configured to contain a coolant fluid; at least one printed circuit mounted on the support member; and at least one light-emitting diode mounted on the printed circuit. A photochemical reactor including such a lamp, and a method for preparing a cycloalkanone oxime or a lactam using such a lamp.

Abstract: The present invention relates to a process for the production of trifluoroethylene in a reactor equipped with a fixed catalytic bed comprising a catalyst, said process comprising a stage a) of reaction of chlorotrifluoroethylene with hydrogen in the presence of the catalyst and in the gas phase in order to produce a stream comprising trifluoroethylene; said stage a) being carried out at a temperature of the fixed catalytic bed T1 of between 50° C. and 250° C.; said process being characterized in that, during stage a), the temperature of the fixed catalytic bed T1 is increased provided that it does not exceed 300° C.