Toray Industries, Inc.

Mitsubishi Hitachi Power Systems, Ltd.

Mitsubishi Power, Ltd.

Hiroshi Takezaki

Itaru Asano

Junko Kawasaki

Nobuyuki Arai

Kenichi Yoshioka

Yuji Echigo

Norimitsu Natsume

Hiroshi Kobayashi

Takahiko Otsubo

Nobuyuki Tomioka

Makiko Saito

Kei Watanabe

Kazusada Takeda

Hisashi Miyama

Shirou Honda

Yosuke Nishimura

Yuko Shimizu

Yoko Wakahara

Hirofumi Kikkawa

Hiroshi Taiko

Shiro Honda

Hiroshi Ishizaka

Akira Kitamura

Kazuki Kobayashi

Hiroyuki Nosaka

Maki Nagano

Kei Makita

Yoshinori Kondo

Mikiya Nishida

Hiroko Tanaka

Yuka Isago

A polysiloxane-polyalkylene glycol block copolymer is obtained by reacting a polysiloxane (A) having any functional group selected from a carboxylic anhydride group, a hydroxyl group, an epoxy group, a carboxyl group, and an amino group with a polyalkylene glycol (B) having any functional group selected from a carboxylic anhydride group, a hydroxyl group, a carboxyl group, an amino group, an epoxy group, a thiol group, and an isocyanate group, wherein a content of a structure derived from the polysiloxane (A) is 20% by mass or more and 90% by mass or less with respect to 100% by mass of the polysiloxane-polyalkylene glycol block copolymer.

Block copolymer and method of producing same, epoxy resin composition and cured product thereof, and semiconductor encapsulating material

A method of producing polybutylene terephthalate resin shaped moldings includes supplying a 3D printer with a polybutylene terephthalate resin powder mixture that contains 100 parts by weight of a polybutylene terephthalate resin powder material having a mean diameter of more than 1 &#x3bc;m and 100 &#x3bc;m or less, a uniformity coefficient of 4 or less, and a terminal carboxyl group quantity of 35 eq/t or more and 50 eq/t or less, and 0.1 to 5 parts by weight of inorganic particles having a mean diameter of 20 to 500 nm.

Polybutylene terephthalate resin powder mixture

Fine polymer particles made by a method include producing an emulsion in a liquid prepared by dissolving and mixing a polymer A and a polymer B in organic solvents in which a solution phase composed primarily of the polymer A and a solution phase composed primarily of the polymer B are formed as separate phases, wherein the solvents in the two phases resulting from the phase separation are substantially identical to each other, and contacting the emulsion with a poor solvent for the polymer A to precipitate the polymer A, wherein the particles have a glass transition point of 150&#xb0; C. or more and 400&#xb0; C. or less, an average particle diameter of 1 &#x3bc;m or more to 100 &#x3bc;m or less, and a particle diameter distribution index of the particles is 2 or less, wherein the polymer A is nonvinyl type polymer.

Method of producing fine particles of non-vinyl thermoplastic polymer

By first forming an emulsion in a system that separates into two phases which include a solution phase containing an ethylene-vinyl alcohol copolymer (A) as the main component and a solution phase containing a polymer (B) different from the ethylene-vinyl alcohol copolymer (A) as the main component when the copolymer (A), the polymer (B), and an organic solvent (C) having an SP value of 20 (J/cm)to 30 (J/cm)are dissolved and mixed together, and then causing the ethylene-vinyl alcohol copolymer (A) to precipitate as microparticles by bringing a poor solvent (D) of the ethylene-vinyl alcohol copolymer (A) into contact with the emulsion, it is possible to obtain ethylene-vinyl alcohol copolymer microparticles that have a narrow particle size distribution wherein the particle size distribution index in a dry-powder state is 2 or less, have a true spherical particle shape, and exhibit excellent re-dispersibility into liquid.

Ethylene-vinyl alcohol copolymer microparticles, dispersion liquid and resin composition containing same, and method of producing said microparticles

A fiber reinforced composite material having high interlaminar toughness and compressive strength under wet heat conditions, as well as an epoxy resin composition for production thereof and a prepreg producible from the epoxy resin composition is described. The prepreg includes at least constituents [A], [B], and [C] as specified below and reinforcement fiber, wherein 90% or more of constituent [C] exists in the depth range accounting for 20% of the prepreg thickness from the prepreg surface: [A] epoxy resin; [B] epoxy resin curing agent; and [C] polymer particles insoluble in epoxy resin.

Prepreg and fiber-reinforced composite material

A method of producing polymer particles includes, in a system in which a polymer A and a polymer B are dissolved in and mixed with an organic solvent to undergo phase separation into two phases which are a solution phase containing the polymer A as a major component and a solution phase containing the polymer B as a major component, continuously adding an emulsion including the polymer A, the polymer B and the organic solvent, and a poor solvent for the polymer A to a vessel continuously to allow the polymer A to precipitate; and separating polymer A particles from the vessel continuously.

Method of producing polymer microparticles

Provided are: fine vinylidene fluoride resin particles which are solid and have an average particle diameter of 0.3 &#x3bc;m or more but less than 100 &#x3bc;m, a particle diameter distribution index of 1-2, a repose angle of less than 40&#xb0;, and an average sphericity of 80 or more said fine vinylidene fluoride particles being suitable for coating materials and coating applications; and a method for producing the fine vinylidene fluoride resin particles.

Method for producing polyvinylidene difluoride particles, and polyvinylidene difluoride particles

A polyarylene sulfide resin powder/grain composition in which 100 weight parts of polyarylene sulfide resin powder/grain material whose average particle diameter exceeds 1 &#x3bc;m and is less than or equal to 100 &#x3bc;m and whose uniformity degree is less than or equal to 4 has been blended with 0.1 to 5 weight parts of an inorganic fine particle having an average particle diameter greater than or equal to 20 nm and less than or equal to 500 nm.

Polyarylene sulfide resin powder/grain composition and method of producing same

A prepreg containing a carbon fiber [A] and a thermosetting resin [B], and in addition, satisfying at least one of the following (1) and (2).

Prepreg and carbon fiber reinforced composite materials

Polyphenylene sulfide microparticles have a linseed oil absorption amount of 40 to 1,000 mL/100 g and a number average particle diameter of 1 to 200 &#x3bc;m. The porous PPS microparticles have a large specific surface area and therefore promote fusion of particles when molded into various molded bodies by applying thermal energy, thus enabling formation or molding of a coating layer of particles at a lower temperature in a shorter time. The porous PPS microparticles have a porous shape and therefore enable scattering light in multiple directions and suppression of specific reflection of reflected light in a specific direction, thus making it possible to impart shading effect and matte effect when added to a medium.

Polyphenylene sulfide microparticles

[Problem] To provide: a fiber-reinforced composite material having both Mode I interlaminar fracture toughness and compressive strength under wet heat conditions; an epoxy resin composition for producing the fiber-reinforced composite material; and a prepreg produced using the epoxy resin composition. [Solution] An epoxy resin composition comprising at least the following constituents [A], [B] and [C]: [A] an epoxy resin; [B] composite polyamide microparticles which satisfy such a requirement (b1) the materials constituting the particles are a polyamide (B1) and a thermoplastic elastomer resin (B2), such a requirement (b2) that the melting point or the glass transition temperature of the polyamide (B1) is higher than 100&#xb0; C. and such a requirement (b3) the number average particle diameter is 0.1 to 100 &#x3bc;m; and [C] a curing agent.

Epoxy resin composition, prepreg and fiber-reinforced composite material

The invention provides a prepreg that can give a fiber-reinforced composite material exhibiting stable and excellent interlaminar fracture toughness and impact resistance under wide molding conditions. The prepreg includes at least a reinforcement fiber [A], a thermosetting resin [B], and the following component [C] wherein 90% or more of the material [C] is present inside a region of the prepreg that extends from any surface of the prepreg to a prepreg site having, from the surface, a depth of 20% of the thickness of the prepreg. The component [C] satisfies requirements that (i) the storage elastic modulus G' of the material constituting the particles is more than 1 MPa, and 70 MPa or less at 180&#xb0; C., and that (ii) the ratio of the storage elastic modulus G&#x2032; of the material constituting the particles at 160&#xb0; C. to the storage elastic modulus G&#x2032; of the material at 200&#xb0; C. ranges from 1 to 5; and is insoluble in the thermosetting resin [B].

Prepreg, fiber-reinforced composite material, and thermoplastic resin particles

The production of polyamide 1010 polymer particles, in which polyamide 1010 resin, a different polymer B and an organic solvent are dissolved and mixed and thereupon an emulsion is formed within a system for phase separation into two phases, being a solution phase having the polyamide 1010 resin as the main component and a solution phase having the polymer B as the main component, and thereafter a poor solvent of the polyamide 1010 resin is brought into contact therewith to precipitate the polyamide 1010 resin, wherein the formation of the emulsion is carried out at a temperature of 100&#xb0; C. or higher, thereby making it possible to obtain highly crystalline polyamide 1010 particles having a high sphericity.

Polyamide 1010 polymer particles and method for producing same

A method of producing polycarbonate-based polymer microparticles including forming an emulsion in a system in which a polycarbonate-based polymer (A), a polymer (B) different from the polycarbonate-based polymer (A) and an organic solvent (C) are dissolved and mixed together and which causes phase separation into two phases of a solution phase having the polycarbonate-based polymer (A) as its main component and a solution phase having the polymer (B) different from the polycarbonate-based polymer (a) as its main component, and contacting a poor solvent for the polycarbonate-based polymer (A) with the emulsion at a temperature of 80&#xb0; C. or higher to thereby precipitate microparticles of the polycarbonate-based polymer (A).

Method of producing polycarbonate-based polymer microparticles comprising contacting an emulsion with a poor solvent, and polycarbonate-based polymer microparticles

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Nagoya, Japan

Hiroshi Takezaki