Abstract: Pressure sensing layers, devices comprising same, pressure sensing monitors and composite materials comprising a) a porous matrix material comprising a siloxane polymer, comprising a closed porosity volume fraction, and, optionally, an open porosity volume fraction, and b) a conductive or semiconductive filler substantially present in said closed porosity volume fraction of said porous matrix material a), and films, coated substrates and multilayer structures comprising the composite material and the use thereof in pressure sensing devices.

Abstract: The invention relates to a method for the melted production, especially by reactive extrusion, of block copolyamide comprising at least one aliphatic polyamide block and at least one semi-aromatic block, especially wherein the aromatic group has at least one hydroxyl or sulfonate function. The invention also relates to the block copolyamide that can be produced by said method; to a composition comprising the block copolyamide; to granules comprising such a copolyamide or such a composition; to a method for producing an item from a copolyamide or a composition of said copolyamide; and to uses of the copolyamide.

Abstract: The present disclosure relates to a compound U comprising at least one urethane functional group, and its use as a fluidizing agent or fluidizing agent precursor in a process for preparing a polyamide article. The process comprises heating a composition comprising at least one polyamide PA and at least one compound U comprising at least one urethane functional group, at a temperature T, for a time t and at a pressure P, wherein the temperature T and the time t are such that CO2 is generated and the melt viscosity of the composition is decreased, in comparison with the melt viscosity of the composition without compound U, and recovering the article. The fluidizing agent can further enable the production of an article that has an unreduced density and/or in which the mean molar mass of the polymers of the composition is increased.

Abstract: Compositions containing particular branched carboxylic acid diesters obtained from a mixture of branched dinitriles exhibit especially advantageous solvating properties and thus are useful substitutes for conventional solvents, in particular halogenated solvents.

Abstract: Modified polyamides are prepared by polymerization of diacid and diamine monomers in the presence of a multifunctional compound having either at least three acid functions or at least three basic functions and, optionally, a monofunctional compound having either an acid function or a basic function. These polyamides can be formulated into molding compositions which can be converted into useful shaped articles.

Abstract: The present invention relates to a method for preparing a foamed item, including the following steps: a) heating a composition including, or consisting of, at least one polyamide PA, at least one compound U including at least one urethane function, particularly a polyurethane PU, at least one reinforcing filler, the content of which is no lower than 10 wt % of the total weight of the composition, and temperature T such that: the compound U directly or indirectly generates CO2, the polyamide is melted, and in particular, such that the composition is injectable; b) injecting or extruding said composition, the injection particularly being injection molding; and c) recovering the foamed item and an expandable granule including, or consisting of, at least one polyamide, at least one compound U, particularly a polyurethane PU, and at least one reinforcing filler, the content of reinforcing filler being no lower than 10 wt % of the total weight of the composition.

Abstract: The present invention relates to the use of a specific compound as a fluidizing agent or as a fluidizing agent precursor in the molten state for a composition including a thermoplastic polymer, in particular a polyamide. The invention further relates to a method for preparing a polyamide article in which the viscosity, in the molten state, of a composition including the polyamide is decreased. The fluidizing agent can further enable the production of an article which has an unreduced density and/or in which the mean molar mass of the polymers of the composition is increased.

Abstract: A method for preparing polyamide foam is described. Polyamide foam produced according to the method is also described. A method including heating a composition including at least one polyamide and at least one polyurethane, and stabilizing the resulting cellular structure is also described. Use of a composition including at least one polyamide and at least one polyurethane for preparing polyamide foam is also described.

Abstract: Novel modified polyamides are prepared by polymerization of diacid and diamine monomers in the presence of certain multifunctional and, optionally, monofunctional compounds; such novel polyamides are formulated into molding compositions which can be converted into useful shaped articles.

Abstract: Polyamide compositions filled with fibers have good mechanical and rheological properties, the polyamide having a high fluidity in molten phase and the fibers, in particular glass fibers, being well aligned at both the surface and the core of shaped articles injection molded from such compositions.

Abstract: Polyamide compositions filled with fibers have good mechanical and rheological properties, the polyamide having a high fluidity in molten phase and the fibers, in particular glass fibers, being well aligned at both the surface and the core of shaped articles injection molded from such compositions.

Abstract: Thermoplastic polymer compositions contain high-fluidity polyamides and have an excellent compromise in terms of properties, in particular mechanical properties and a high fluidity in the molten state; such compositions contain at least one high-fluidity polyamide and a high filler content, such as glass fibers.

Abstract: Compositions containing particular branched carboxylic acid diesters obtained from a mixture of branched dinitriles exhibit especially advantageous solvating properties and thus are useful substitutes for conventional solvents, in particular halogenated solvents.

Abstract: The invention relates to novel water-soluble or water-dispersible sulphonated linear copolymers comprising sulphonated linear polyesteramides and, optionally, sulphonated linear polyester chains and/or polyamides. The invention also relates to the use of said copolymers as a soil release and/or anti-redeposition and/or detergent agent in compositions for treating (washing and/or rinsing, stain removal before washing, drying in a clothes dryer or ironing) articles made from textile fibers, such as polyamide fibers.