Abstract: A thermally-conductive silicone gel composition of the present invention contains A to D components below. A: a linear organopolysiloxane having one vinyl group at each terminal end of a molecular chain and a kinematic viscosity of 1 to 600 mm2/s, B: a linear organopolysiloxane having three or more Si—H groups in one molecule and an Si—H group content of 0.05 to 6 mol/kg, in an amount such that a ratio of the number of Si—H groups in B component to the number of vinyl groups in A component is 0.2 to 0.5, C: a platinum catalyst in a catalytic amount, and D: a thermally-conductive filler in an amount of 300 to 1000 parts by mass when a total amount of A and B is taken as 100 parts by mass.

Abstract: A thermally conductive silicone gel composition of the present invention includes the following A to F: (A) an organopolysiloxane having two alkenyl groups per molecule; (B) an organohydrogenpolysiloxane having two Si—H groups per molecule; (C) an organohydrogenpolysiloxane having three or more Si—H groups per molecule; (D) at least one compound selected from the group consisting of D1 and D2: (D1) an organopolysiloxane having one alkenyl group per molecule and (D2) an organohydrogenpolysiloxane having one Si—H group per molecule; (E) a platinum catalyst; and (F) a thermally conductive filler in an amount of 100 to 600 vol % with respect to 100 vol % of the total amount of the A to E. The components A to F are cured. With this configuration, the thermally conductive silicone gel composition can reduce oil bleeding, even though the composition is a gel cured product.

Abstract: A magneto-rheological elastomer composition (10) includes a matrix resin (12) and a magnetic powder (11). The magnetic powder (11) is contained in an amount of 30 to 70% by volume based on 100% by volume of the composition. The magneto-rheological elastomer composition (10) has an Asker C hardness of 5 to 60 as determined by the Standard SRIS0101 of the Society of Rubber Science and Technology, Japan. The average particle size of the magnetic powder is preferably 2 to 500 ?m, and the matrix resin is preferably an organopolysiloxane. The storage modulus of the magneto-rheological elastomer composition preferably changes by five times or more upon application of a magnetic force with a magnetic flux density of 200 mT. Thus, the present invention provides a magneto-rheological elastomer composition that greatly changes its storage modulus upon application of magnetism, a method for producing the same, and a vibration absorbing device including the same.

Abstract: A composite material of the present invention is a composite material including cellulose nanofibers and nanoparticles. The structure of the nanoparticles is composed of primary nanoparticles with a particle diameter of 3 to 50 nm or aggregated nanoparticles with a particle diameter of 100 nm or less in which the nanoparticles are aggregated. The surfaces of the cellulose nanofibers are densely covered with the nanoparticles. The composite material has a thermal conductivity in a plane direction of preferably 3.0 W/m·K or more. The production method of the composite material of the present invention includes continuously or sequentially mixing a suspension in which cellulose nanofibers are dispersed in a dispersion medium and a suspension in which nanoparticles are dispersed in a dispersion medium to obtain a composite material in which the surfaces of the cellulose nanofibers are densely covered with the nanoparticles.

Abstract: A magneto-rheological elastomer composition (10) includes a matrix resin (12) and a magnetic powder (11). The magnetic powder (11) is contained in an amount of 30 to 70% by volume based on 100% by volume of the composition. The magneto-rheological elastomer composition (10) has an Asker C hardness of 5 to 60 as determined by the Standard SRIS0101 of the Society of Rubber Science and Technology, Japan. The average particle size of the magnetic powder is preferably 2 to 500 ?m, and the matrix resin is preferably an organopolysiloxane. The storage modulus of the magneto-rheological elastomer composition preferably changes by five times or more upon application of a magnetic force with a magnetic flux density of 200 mT. Thus, the present invention provides a magneto-rheological elastomer composition that greatly changes its storage modulus upon application of magnetism, a method for producing the same, and a vibration absorbing device including the same.