Teijin Limited

Teijin Techno Products Limited

North Carolina State University

National Institute for Materials Science

Hiroaki Kuwahara

Shunichi Matsumura

Masayuki Chokai

Takeyuki Kawaguchi

Akimichi Oda

Satoru Ohmori

Hironori Kawamoto

Anton Peter De Weijer

Susumu Honda

Bruce M Novak

Takanori Miyoshi

Hiroyoshi Minematsu

Hirotaka Suzuki

Tetsuya Akamatsu

Susumu Maruo

Dennis Wilbers

Dmitri Golberg

Yoshio Bando

Takaya Suzuki

Suguru Ozawa

Kazuma Kurokawa

Chunyi Zhi

Chengchun Tang

Kazuhiko Sato

Michio Iwai

Miki Horikawa

Bunsow Nagasaka

Hideaki Tominaga

According to the present invention, there is provided a prepreg characterized by including a reinforcing fiber substrate composed of a reinforcing fiber, and an epoxy resin composition with which the reinforcing fiber substrate is partially or wholly impregnated, in which the epoxy resin composition includes, as an essential component, an epoxy resin, an amine-based curing agent, and a polyamide particle, the epoxy resin composition includes, as an optional component, an epoxy resin-soluble thermoplastic resin; and an epoxy group is introduced to the surface of the polyamide particle, and/or at least one of the epoxy resin, the amine-based curing agent, and the epoxy resin-soluble thermoplastic resin, included in the epoxy resin composition, partially permeates into the polyamide particle.

Prepreg, method for producing same, and method for producing fiber-reinforced composite material

The present invention provides a thermosetting resin composition characterized by comprising a bismaleimide compound and a triazine compound having a diaminotriazine structure.

Thermosetting resin composition, film adhesive, prepreg, and production method thereof

The present invention provides a prepreg which is composed of at least a matrix resin and reinforcing fibers, and which is characterized in that: conductive parts are formed on one surface or both surfaces of a fiber layer that is formed of the reinforcing fibers; and the volume resistivity &#x3c1; (&#x3a9;cm) of the fiber layer in the thickness direction, the thickness t (cm) of the fiber layer and the average interval L (cm) between the conductive parts arranged on the prepreg surface satisfy formula (1)./&#x3c1;&#xd7;1/&#xd7;100&#x2265;0.5&#x2003;&#x2003;Formula (1):

Prepreg, fiber-reinforced composite material and surface-modified reinforcing fibers

The present invention provides an epoxy compound indicated by chemical formula (1) (in chemical formula (1), X indicates a C1-10 aliphatic hydrocarbon group, Rand Reach independently indicate one selected from the group consisting of a hydrogen atom, an aliphatic hydrocarbon group, an aromatic group, an alkoxy group, and a halogen atom) 

Epoxy compound, epoxy resin, epoxy resin composition, cured resin product, prepreg, fiber-reinforced composite material, and production methods for these

A boron nitride fiber paper having a very small fiber diameter and exhibiting excellent heat resistance, mechanical properties and heat conductivity. The fiber paper is composed of a fiber assembly which contains boron nitride fibers having a fiber diameter of not more than 1 &#x3bc;m in an amount of not less than 40 wt %.

Boron nitride-based fiber paper and manufacturing process thereof

This invention is to provide a dope that has excellent formability and can be formed into a fiber, a film, pulp-shaped particles and the like by a wet method. This invention is also to provide a process for the production of a fiber excellent in heat resistance, strength and elastic modulus. This invention provides a dope and a process for the production of a fiber from the dope, the dope including a polyamide and a basic solvent, the polyamide containing a recurring unit of the following formula (I), wherein Arrepresents at least one substituent selected from the group consisting of and having an inherent viscosity of 1.0 or more, the dope has a polyamide concentration of over 10% by weight but not more than 25% by weight and exhibits optical anisotropy at 50&#xb0; C.

Dope and process for the production of fiber from the dope

An object of this invention is to provide an electrolytic membrane excellent in ion conductivity and oxidation resistance, and this invention is directed to an electrolytic membrane formed of a polymer comprising at least one recurring unit selected from the group consisting of a recurring unit of the following formula (A), and a recurring unit of the following formula (B), and having a reduced viscosity, measured in a methanesulfonic acid solution having a concentration of 0.5 g/100 ml at 25&#xb0; C., of 0.05 to 200 dl/g, and a process for the production thereof.

Electrolytic membrane

Coated carbon nanotubes coated with 0.01-100 parts by weight of at least one type of aromatic condensation polymer selected from the group consisting of wholly aromatic polyamides, wholly aromatic polyesters, aromatic polyester carbonates, aromatic polycarbonates, semi-aromatic polyesters and wholly aromatic azoles, with respect to 100 parts by weight of the carbon nanotubes, as well as a process for their production. Aromatic condensation polymer compositions comprising 0.01-100 parts by weight of the coated carbon nanotubes and 100 parts by weight of an aromatic condensation polymer, and molded articles formed using them.

Carbon nanotube coated with aromatic condensation polymer

There are provided a rigid heterocyclic polymer comprising rigid recurring units such as units represented by the following formulae (a) and (b): wherein X is O, S or NH,a production process thereof, and fibers comprising the polymer.

Rigid heterocyclic polymer, production process thereof, and fibers comprising the polymer

There is provided a carbon fiber precursor polymer which is composed of a polymer comprising 50 wt % or greater of an acrylonitrile component, wherein the isotactic triad proportion of the acrylonitrile structural chain composed of the acrylonitrile component is 35 mole percent or greater based on the total triad proportion of the acrylonitrile structural chain composed of the acrylonitrile component, the carbon fiber precursor polymer allowing flame retardant treatment to be carried out slowly from a low temperature range, and having satisfactory flame retardant properties including low heat generation.

Polymer for carbon fiber precursor

The polymerization of polar vinyl monomers in the presence of Lewis acids produces stereoregular vinyl polymers. Polar vinyl monomers may be mixed with Lewis acids to form associations or complexes between the monomers and Lewis acids. The mixtures or monomer-Lewis acid complexes may be polymerized to produce the desire stereoregular vinyl polymers.

Stereoregular polar vinyl polymers and methods of making the same

The gel adhesive of the present invention contains an elastomer component (A), a self-adhesive polymer component (B) compatible with the elastomer component (A), and a liquid component (C) compatible with the elastomer component (A) and the self-adhesive polymer (B), the liquid component (C) being held in a mixture of the elastomer component (A) and the self-adhesive polymer (B) without exuding, to form as a whole, a gel, and is useful for forming a self-adhesive layer of an adhesive material or a pharmaceutical-containing self-adhesive layer of an adhering pharmaceutical preparation, which layer is capable of being firmly adhered to a surface to be adhered, and particularly a body skin surface, and of being easily removed therefrom without leaving a portion of the layer on the adhered surface.

Gel-form pressure-sensitive adhesive, and adhesive material and adhesive medicinal preparation both containing the same

A novel polyalkyl ether/polyaryl ether sulfone or ketone copolymer and a specific polyether ester copolymer are useful for producing a medical material to be used to contact the blood; and methods for producing the medical material comprising said polyalkyl ether/polyaryl ether sulfone or ketone copolymer or a specific polyether ester copolymer.

Growing community of inventors

Iwakuni, Japan

Hiroaki Kuwahara