One aspect of the present application relates to a resin composition including a modified polyphenylene ether compound having a carbon-carbon unsaturated double bond at a molecular end, a maleimide compound having two or more N-substituted maleimide groups in one molecule, and a liquid styrene-butadiene copolymer having a weight average molecular weight of less than 10000 and having a 1,2-vinyl group.

[Problem] Provided is a resin composition, resin sheet, prepreg and printed wiring board capable of obtaining excellent low permittivity, low dielectric loss tangent, flexibility and peel strength.

[Solution Means] A resin composition containing (A) a maleimide compound exhibiting a relative permittivity of lower than 2.7, (B) a polyphenylene ether compound represented by general formula (1) below and having a number-average molecular weight of 1000 to 7000, and (C) a block copolymer with a styrene skeleton. In general formula (1), X represents an aryl group, —(Y—O)n.sub.2- represents a polyphenylene ether portion, R.sub.1, R.sub.2 and R.sub.3 each independently represent a hydrogen atom or an alkyl, alkenyl or alkynyl group, n.sub.2 represents an integer of 1 to 100, n.sub.1 represents an integer of 1 to 6 and n.sub.3 represents an integer of 1 to 4.

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The present invention relates to an aqueous binder for a heat-insulating and sound-absorbing inorganic fiber material, the aqueous binder comprising a polymer having a carboxy group and a crosslinking agent for the polymer, wherein the crosslinking agent comprises an alkanol monoamine and a polyamine having an imino group, the polyamine has an amine value of 1200 to 1650 mg KOH/g, and a ratio of the total number of moles of amino groups and imino groups in the crosslinking agent with respect to the total number of moles of hydroxyl groups, amino groups, and imino groups in the crosslinking agent is 0.6 or less.

A resin composition includes: a resin as Component (A); and an inorganic filler as Component (B). The Component (B) includes anhydrous magnesium carbonate as Component (b1) and aluminum oxide as Component (b2). Content of the Component (b1) falls within a range from 35% by volume to 65% by volume relative to 100% by volume of the Components (b1) and (b2) combined. Content of the Component (B) falls within a range from 60% by volume to 75% by volume relative to 100% by volume of the resin composition.

Pre-impregnated composite material (prepreg) that can be cured/molded to form aerospace composite parts. The prepreg includes carbon reinforcing fibers and an uncured resin matrix. The resin matrix includes an epoxy resin component, polyethersulfone as a toughening agent, a thermoplastic particle component, a nanoparticle component and a curing agent.

A heat-radiating sheet, in which a rate of reduction (%) ((R1-R2)/R1×100) of a thermal resistance (R2) (° C./W) of the heat-radiating sheet as measured when tightened at a tightening torque of 6 kgf.Math.cm by using a screw after being impregnated in an antifreeze containing 98% by mass or more of ethylene glycol at a temperature of 25° C. for 500 hours relative to a thermal resistance (R1) (° C./W) of the heat-radiating sheet as measured when tightened at a tightening torque of 6 kgf.Math.cm by using a screw is 30% or less. It is possible to provide a heat-radiating sheet having high tolerance against gasoline and engine oil.

A multilayer radar-absorbing laminate includes three juxtaposed blocks. A first electrically conductive block is arranged toward the inside of the aircraft in use. A second electromagnetic intermediate absorber block has a layer of electrically non-conductive fiber sheets is permeated by graphene-based nanoplatelets to achieve a periodic and electromagnetically subresonant layer, the conductive layers containing graphene nanoplatelets alternating with non-conductive layers. A third block of electrically non-conductive material is arranged towards the outside and forms part of the outer surface of the aircraft. The second block is produced by depositing on the fiber sheets a suspension of graphene nanoplatelets in a polymeric mixture, with controlled penetration of the graphene nanoplatelets into the fiber sheets. A plurality of dry fiber sheets sprayed with the suspension of graphene nanoplatelets is superimposed. An unpolymerized thermosetting synthetic resin is infused into a lay-up made of the first, second and third blocks. Afterwards, the thermosetting resin is polymerized.

A resin composition contains one or more 2-methylene-1,3-dicarbonyl compounds. At least one of the one or more 2-methylene-1,3-dicarbonyl compounds has a molecular weight of 220 to 10,000, and the amount by weight of those of the 2-methylene-1,3-dicarbonyl compounds having a molecular weight of less than 220 relative the entire resin composition of 1 is 0.00 to 0.05. The 2-methylene-1,3-dicarbonyl compounds contain a structural unit represented by formula (I) below. ##STR00001##

The present invention relates to curable resin compositions, to methods for producing cured compositions using said curable resin compositions, and to items, in particular molded parts, produced by means of such method.

The present invention relates to a liquid composition comprising a monomer, a (meth)acrylic polymer and at least one flame-retardant substance (FD1) chosen from a phosphorus-based additive. In particular the present invention it relates to a liquid composition comprising a monomer, a (meth)acrylic polymer and at least one flame-retardant substance (FD1) chosen from a phosphorus-based additive that can be used as a syrup and especially as a syrup for impregnation and for the preparation for improving the fire resistance of a thermoplastic polymer or matrix obtained after polymerization of the syrup. Also concerned is a thermoplastic material obtained after polymerization of the liquid composition or syrup. The invention also relates to a process for manufacturing such a liquid composition or syrup. The invention also relates to a process for impregnating a fibrous substrate of long fibers with said liquid composition or syrup. The invention also relates to a fibrous substrate preimpregnated with said liquid composition or syrup which is useful for manufacturing composite parts. The present invention also relates to a process for manufacturing mechanical parts or structural elements made of composite material and to mechanical parts or structural elements made of composite material obtained via a process using such a liquid composition.