Disclosed herein are emulsifiers for epoxy resins obtained by reacting an epoxy resin with a mixture of a polyethylene glycol having an average molecular weight of greater than 4000 g/mol and less than 10,000 g/mol and a block copolymer of polyethylene glycol and polypropylene glycol, aqueous epoxy resin dispersions including the same, and methods for preparation thereof.

The present invention aims to provide an epoxy resin composition for a fiber-reinforced composite material that maintains low viscosity during injection into reinforcing fibers to realize good impregnating and also has high toughness and high heat resistance and also aims to provide a fiber-reinforced composite material produced therefrom. Also provided is a molding method for a fiber-reinforced composite material including at least a reinforcing fiber [A] and a cured product of an epoxy resin composition [B], wherein the epoxy resin composition [B] includes the components [a], [b], and [c] specified below, and the epoxy resin composition [B] is cured in such a manner that the absorbance ratio Da/(Da+Db) is in the range of 0.4 to 1 in producing the fiber-reinforced composite material: [a] an epoxy resin having at least two oxirane groups in the molecule, [b] an epoxy resin curing agent having at least two isocyanate groups in the molecule, and [c] a catalyst.

A resin composition contains a thermosetting resin (A) and an inorganic filler (B). The inorganic filler (B) includes: a first filler (B1); and a second filler (B2) of a nanometer scale having a smaller particle size than the first filler (B1). The first filler (B1) includes an anhydrous magnesium carbonate filler (b1) and an alumina filler (b2). The proportion of the first filler (B1) relative to a total solid content in the resin composition is equal to or greater than 50% by volume and equal to or less than 90% by volume. The proportion of the second filler (B2) relative to the total solid content in the resin composition is equal to or greater than 0.1% by volume and equal to or less than 2.0% by volume.

The purpose of the present invention is to provide: an epoxy resin composition which enables the achievement of a resin cured product that has high flame retardancy and excellent mechanical characteristics; and a prepreg and a fiber-reinforced composite material, each of which uses this epoxy resin composition. One embodiment of the epoxy resin composition according to the present invention, said epoxy resin composition having achieved the above-described purpose, contains the components (A) and (B) described below. (A): a bifunctional glycidyl amine type epoxy compound (B): an epoxy compound having a specific structure and/or an epoxy compound having another specific structure

Examples include a device including a nanovoided polymer element having a first surface and a second surface, a first plurality of electrodes disposed on the first surface, a second plurality of electrodes disposed on the second surface, and a control circuit configured to apply an electrical potential between one or more of the first plurality of electrodes and one or more of the second plurality of electrodes to induce a physical deformation of the nanovoided polymer element.

There are provided a fiber reinforced thermoplastic resin molded article including a thermoplastic resin [A], carbon fibers [B] and a polyrotaxane [C], the thermoplastic resin [A], the carbon fibers [B] and the polyrotaxane [C] being included in amounts of 40 to 98 parts by weight, 1 to 40 parts by weight and 1 to 20 parts by weight, respectively, based on 100 parts by weight of the total content of the thermoplastic resin [A], the carbon fibers [B] and the polyrotaxane [C], wherein the carbon fibers [B] included in the molded article have a weight-average fiber length [Lw] in a range of 0.5 to 20 mm, and a ratio ([C]/[B]) of the content of the polyrotaxane [C] to that of the carbon fibers [B] is 0.04 or more and 0.5 or less; and a thermoplastic resin molded article which has excellent impact strength and also has excellent conductivity.

In order to solve problems of strength and volume of part, the invention provides an article reinforced by multi-dimensional fibers and a method for manufacturing the article. The article includes a core portion and a shell layer portion. The core portion is made of thermoplastic resin and the fibers in which a majority of and a minority of the fibers are respectively arranged in a major and a minor directions. The method includes: preparing a core portion made of thermoplastic resin and the fibers in which a majority of and a minority of the fibers are respectively arranged in a major and a minor directions, loading the core portion into a mold, and forming a shell layer portion in the mold to enclose the core portion. The article manufactured by the method of this invention can reduce the weight and increase the strength of the parts.

A conductive resin composition including 100 parts by weight of a base resin (A), which includes a polyester, a polyarylene ether, and an aromatic elastomer; 3 to 12 parts by weight of two or more polyfunctional reaction agents (B); 0.1 to 3 parts by weight of carbon nanotubes (C); 0.1 to 5 parts by weight of carbon nanoplates (D); and 1 to 10 parts by weight of glass powder (E), a method of preparing the conductive resin composition, and a molded article including the conductive resin composition. The conductive resin composition has excellent moisture stability and heat resistance in addition to excellent appearance, rigidity, and conductivity; can minimize the influence of moisture and heat when exposed to external environments; and thus, can be used in exterior parts to replace metal parts used in automobiles.

A resin composition is provided, which includes a first polymer and a second polymer. The first polymer is formed by a reaction of an epoxy resin modified with a first elastic molecular segment and an epoxy resin curing agent. The second polymer is formed by a polymerization of an acrylate modified with a second elastic molecular segment.

The present invention is related to decorative surface coverings, in particular floor or wall coverings, comprising one or more layer(s) and a cured top-layer, combining excellent anti-slip properties and scuff resistance. The invention is further related to a method for the preparation of said surface coverings.