Abstract: A thermoset material obtained from a curing by heat treatment of a resin that can be obtained by polycondensation, in basic medium, of at least one phthalonitrile compound bearing on its benzene ring at least one hydroxyl group.

Abstract: A method for preparing a resol-type phenolic resin comprising the following steps: a) a step of condensing phenol and formaldehyde, in a basic medium, the formaldehyde being in molar excess with respect to the phenol, at a condensation temperature of at least 50° C. until the phenol conversion rate is 50 to 80%, whereby a resol-type phenolic resin results comprising free formaldehyde; b) a step of measuring the free formaldehyde content of the phenolic resin obtained in a); c) a step of reducing the free formaldehyde content of the phenolic resin obtained in a) by placing it in contact with an aminophenolic compound in an excess amount with respect to the free formaldehyde and at a temperature lower than the condensation temperature of step a).

Abstract: The invention relates to a crosslinking compound of formula (I) In particular, the present invention relates to a liquid composition comprising a monomer, a (meth)acrylic polymer and at least one crosslinking compound of formula (I). This liquid composition may be used in the form of a syrup and in particular in the form of a syrup for impregnating fibers or fibrous material. The invention also relates to a pseudo-thermoplastic material obtained after polymerization of the liquid composition being at least partially crosslinked. The invention also relates to a process for manufacturing such a liquid composition. The invention also relates to a process for impregnating a long-fiber fibrous substrate 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: The present invention relates to a polyurethane thermoplastic elastomer, to a composition comprising said polyurethane and a binder, for example bitumen and/or a biobased binder, and also to the use of the composition for the preparation of a waterproofing membrane, a soundproofing membrane, a liquid sealing system, a bituminous mix surfacing, a mastic asphalt surfacing, a primer, a varnish, a mastic, an adhesive or a binder emulsion

Abstract: The invention relates to a crosslinking compound of formula (I) In particular, the present invention relates to a liquid composition comprising a monomer, a (meth)acrylic polymer and at least one crosslinking compound of formula (I). This liquid composition may be used in the form of a syrup and in particular in the form of a syrup for impregnating fibers or fibrous material. The invention also relates to a pseudo-thermoplastic material obtained after polymerization of the liquid composition being at least partially crosslinked. The invention also relates to a process for manufacturing such a liquid composition. The invention also relates to a process for impregnating a long-fiber fibrous substrate 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 method for coating a surface comprises applying a layer of coating composition onto the surface, mechanically forming parallel ribs on the layer, and simultaneously polymerizing the layer with ultraviolet radiations. The coating composition comprises a mass percentage of urethan-acrylate oligomer, with an average molar mass in number between 1000 and 5000 g·mol?1, between 35% and 75%. The coating composition further comprises a mass percentage of a diluting agent, copolymerizable with urethan-acrylate oligomers, between 15% and 60%, and a mass percentage of pyrogenic silica between 0.5% and 5%.

Abstract: The invention relates to a process for preparing a composite material comprising a fluorinated polymeric matrix and a filler consisting in ion exchange inorganic particles comprising a step for in situ synthesis of said particles within the polymeric matrix, said matrix comprising at least one first copolymer comprising at least two types of fluorinated recurrent units, a type of which bears at least one pendant maleic anhydride group.

Abstract: A composite material for manufacturing a device for containment of a cryogenic liquid and a device for containment of a cryogenic liquid which comprises at least one layer made of this composite material. The composite material is obtained from a composition comprising, in percentages by weight relative to the total weight of the composition: from 60% to 90% of a polyamide chosen from polyamides 6, 6.6 and 6/6.6 and mixtures thereof; from 10% to 30% of a primary synthetic graphite in the form of particles; and from 0% to 10% of an anti-oxidant. Applications: manufacture of cryogenic tanks and notably liquid oxygen tanks, particularly for a space launcher, manufacture of supply lines of cryogenic liquids and particularly liquid oxygen; manufacture of any device for the storage, transport and/or supply of a gas under pressure.

Abstract: The invention relates to a process for preparing a composite material comprising a fluorinated polymeric matrix and a filler consisting in ion exchange inorganic particles comprising a step for in situ synthesis of said particles within the polymeric matrix, said matrix comprising at least one first copolymer comprising at least two types of fluorinated recurrent units, a type of which bears at least one pendant maleic anhydride group.

Abstract: The invention relates to a process for preparing a composite material comprising a fluorinated polymeric matrix and a filler consisting in ion exchange inorganic particles comprising a step for in situ synthesis of said particles within the polymeric matrix in the presence of a compatibilizing agent consisting in a copolymer comprising a first recurrent unit from the polymerization of a fluorinated ethylene monomer and a second recurrent unit from the polymerization of an optionally fluorinated (meth)acrylic monomer, said first recurrent unit being different from said second recurrent unit and said copolymer being different from (co)polymers entering the structure of the fluorinated polymeric matrix.

Abstract: The invention relates to a method for preparing a composite material comprising a polymeric matrix and a filler consisting in ion exchange inorganic particles, comprising a step for synthesis in situ of said particles within the polymeric matrix.

Abstract: Storage-stable reactive inorganic clusters and a process for preparing such storage-stable reactive inorganic clusters (e.g., silica structures) having, for example, reactive amino groups. The storage-stable reactive inorganic clusters may be used as a curing agent for thermosetting resin compositions such as epoxy resins.

Abstract: Embodiments of the present disclosure include a composition of cross-linked reactive polymer microparticles and a method of producing cross-linked reactive polymer microparticles that includes reacting an epoxy resin with an amine curing agent in a dispersing media at a temperature of 50° C. to 120° C. for a reaction time of no greater than 17 hours so that the cross-linked reactive polymer microparticles have no greater than 0.001 weight percent of the dispersing media bound to the cross-linked reactive polymer microparticles; and phase separating the cross-linked reactive polymer microparticles and the dispersing media.

Abstract: Embodiments of the present disclosure include a thermoset cross-linked network and a method of producing the thermoset cross-linked network from a reaction product of a curable epoxy system in a liquid phase and cross-linked reactive polymer microparticles in a solid phase. For the various embodiments, the cross-linked reactive polymer microparticles have a cross-link density and reactive groups that covalently react with the curable epoxy system to provide the thermoset cross-linked network in a single contiguous phase having a topological heterogeneity.

Abstract: A method for coating a surface comprises applying a layer of coating composition onto the surface, mechanically forming parallel ribs on the layer, and simultaneously polymerizing the layer with ultraviolet radiations. The coating composition comprises a mass percentage of urethan-acrylate oligomer, with an average molar mass in number between 1000 and 5000 g·mol?1, between 35% and 75%. The coating composition further comprises a mass percentage of a diluting agent, copolymerizable with urethan-acrylate oligomers, between 15% and 60%, and a mass percentage of pyrogenic silica between 0.5% and 5%.

Abstract: The invention relates to a method for preparing a composite material comprising a polymeric matrix and a filler consisting in ion exchange inorganic particles, comprising a step for synthesis in situ of said particles within the polymeric matrix.

Abstract: A reactive thermosettable resin composition including (a) at least one thermosetting resin; (b) at least one curing agent, and (c) optionally, at least one catalyst; wherein the curing agent (b) comprises a reactive inorganic cluster; and wherein the clusters are storage-stable inorganic clusters with reactive functional groups, such as amino groups; a process for preparing a thermoset product from the thermosettable composition. A composition of the reactive clusters as a curing agent and a thermosetting resin may be used to prepare thermoset products with improved thermo-mechanical behavior.

Abstract: A reactive thermosettable resin composition including (a) at least one thermosetting resin; (b) at least one curing agent, and (c) optionally, at least one catalyst; wherein the curing agent (b) comprises a reactive inorganic cluster; and wherein the clusters are storage-stable inorganic clusters with reactive functional groups, such as amino groups; a process for preparing a thermoset product from the thermosettable composition. A composition of the reactive clusters as a curing agent and a thermosetting resin may be used to prepare thermoset products with improved thermo-mechanical behavior.

Abstract: A system for connecting two ferrules of an axial compressor case. A ferrule includes a female flange, while the other ferrule includes a male flange. Both the female flange as well as the male flange are substantially annular and include a proximal face intended to be integral with the ferrule, and a distal face. The male flange is intended to be introduced into a space bound by an axial extension of the female flange. The system further includes a trim intended to be introduced behind the male flange into the space and clamped between the proximal face of the male flange and a surface of the extension substantially opposite in order to space them apart and thus clamp the distal faces of both flanges one against the other.

Abstract: The invention concerns a novel type of turbomachine. The stator of the turbomachine comprises a plurality of profiled members forming stiffeners arranged on the blade stage. The profiled members are distributed uniformly at periphery of the blade stage and individually between two consecutive blades. The stiffeners are fixed to the internal and external ferrules of the stator in order to uniformly increase the axial and radial stiffness of the stator in normal operation of the turbomachine and to allow the internal ferrules to have a limited displacement during the normal functioning of the turbomachine. This makes it possible to reduce the axial sizing of the turbomachine, and consequently its mass.