Nippon Telegraph and Telephone Corporation

Hitachi, Ltd.

Rohm Co., Ltd.

Pioneer Corporation

Mitsubishi Chemical Corporation

Daikin Industries, Ltd.

Kyoto University

Wako Pure Chemical Industries, Inc.

Daiken Industries, Ltd.

Tohru Maruno

Kouzaburou Nakamura

Takashi Kurihara

Shigeki Ishibashi

Seiji Toyoda

Saburo Imamura

Satoru Tomaru

Shoichi Hayashida

Koji Enbutsu

Akira Nagai

Yoshitaka Takezawa

Motonobu Kubo

Akira Ohmori

Takao Miwa

Hideo Kobayashi

Toshiyuki Miyadera

Yoshiki Shimizu

Hiroyuki Yano

Keishin Handa

Masaya Nogi

Norio Murata

Tohru Matsuura

Junji Sugiyama

Shin-ichiro Iwamoto

Nobutatsu Koshoubu

Fumiyoshi Urano

Shogo Kobayashi

Masaaki Nakahata

Renshi Sawada

Takaaki Negishi

Shinji Tsuru

Eiji Higurashi

Toshio Horie

The present invention relates to a fiber-reinforced composite material and a method for manufacturing the same, and also relates to a transparent multilayered sheet, a circuit board, and an optical waveguide.

Fiber-reinforced composite material, method for manufacturing the same, and applications thereof

There is provided a fiber-reinforced composite material containing fibers having an average fiber diameter of 4 to 200 nm and a matrix material, the composite material having a visible light transmittance of 60% or more at a wavelength of 400 to 700 nm, which is a conversion value based on a thickness of 50 &#x3bc;m. A fiber-reinforced composite material composed of a matrix material and a fiber aggregate impregnated therewith is provided, in which when a segment length of a bright region corresponding to a pore region of the fiber aggregate is represented by L, which is obtained by statistical analysis of a unidirectional run-length image formed from a binary image obtained by binarization of a scanning electron microscopic image of the fiber aggregate, the total length of segments that satisfy L&#x2267;4.5 &#x3bc;m is 30% or less of the total analyzed length. A transparent multilayered sheet, a circuit board, and an optical waveguide are provided which use a transparent substrate formed from this fiber-reinforced composite material.

Fiber-reinforced composite material, method for manufacturing the same and applications thereof

A photosensitive composition for optical waveguides comprising of an organic oligomer, a polymerization initiator and a crosslinking agent, the organic oligomer being a silicone oligomer represented by the following formula (1), wherein X denotes hydrogen, deuterium, halogen, an alkyl group or an alkoxy group; m is an integer from 1 to 5; x and y represent the proportion of respective units, and neither x nor y is 0; and Rdenotes a methyl, ethyl, or isopropyl group; a production method thereof, and a polymer optical waveguide pattern formation method using the same 

Photosensitive composition for manufacturing optical waveguide, production method thereof and polymer optical waveguide pattern formation method using the same

A photosensitive composition for optical waveguides comprising of an organic oligomer, a polymerization initiator and a crosslinking agent, the organic oligomer being a silicone oligomer represented by the following formula (1), wherein X denotes hydrogen, deuterium, halogen, an alkyl group or an alkoxy group; m is an integer from 1 to 5; x and y represent the proportion of respective units, and neither x nor y is 0; and Rdenotes a methyl, ethyl, or isopropyl group; a production method thereof, and a polymer optical waveguide pattern formation method using the same.

A photosensitive composition for optical waveguides comprising of an organic oligomer, a polymerization initiator and a crosslinking agent, the organic oligomer being a silicone oligomer represented by the following formula (1), wherein X denotes hydrogen, deuterium, halogen, an alkyl group or an alkoxy group; m is an integer from 1 to 5; x and y represent the proportion of respective units, and neither x nor y is 0; and R denotes a methyl, ethyl, or isopropyl group; a production method thereof, and a polymer optical waveguide pattern formation method using the same.

The micro-mirror apparatus of the invention has; a mirror , a plurality of torsion springs for supporting the mirror so as to be tiltable relative to an upper substrate , a lower substrate arranged facing a lower face of the mirror , a convex portion provided on an upper face of the lower substrate and a plurality of lower electrodes formed on an outer face of the convex portion . For the torsion spring , an aspect ratio of height/width in a cross-section perpendicular to a longitudinal direction thereof is at least 1.8.

Micro-mirror apparatus and production method therefor

The fluorine-containing epoxy(meth)acrylate resin of the invention is represented by the following general formula (I). ##STR1## wherein R.sub.f is selected from the group consisting of --.phi.--C(CF.sub.3).sub.2 --.phi.--(where .phi. stands for ##STR2## --C(CF.sub.3).sub.2 --.phi.'--C(CF.sub.3).sub.2 --(where .phi.' stands for and --CH.sub.2 (CF.sub.2).sub.6 CH.sub.2 --; n is zero or a positive interger; and X is hydrogen or methyl group. The resin of the invention may be prepared by reacting a diglycidyl ether of a fluorine-containing hydrocarbon (R.sub.f) with acrylic acid or methacrylic acid. Further provided is an adhesive composition comprising the aforementioned fluorine-containing epoxy(meth)acrylate resin and a photo-polymerization initiator, which can be cured at room temperature within a short time by irradiation with UV rays to form a cured product having a refractive index N.sub.D.sup.20 ranging from 1.434 to 1.532. The adhesive composition of the invention has a particular utility when used to form a part or zone contacting with a quartz glass or glass fibers, since it is improved in matching of the refractive index with those of the quartz glass and optical fibers.

Fluorine-containing epoxy(meth)acrylate resin adhesive cured in presence

An adhesive composition comprising a photopolymerization initiator or curing agent and the compound represented by the formula (I) ##STR1## wherein M is a divalent organic group comprising at least one substituted or unsubstituted alicyclic hydrocarbon group or a divalent organic group comprising at least two substituted or unsubstituted aromatic hydrocarbon groups, the alicyclic hydrocarbon group or aromatic hydrocarbon group may be linked by O, S or CH.sub.2 or may form a condensed ring, n is zero or a positive number.

Fluorine-containing alicyclic and aromatic cyclic compounds, process

The fluorine-containing epoxy(meth)acrylate resin of the invention is represented by the following general formula (I). ##STR1## wherein R.sub.f is selected from the group consisting of --.phi.--C(CF.sub.3).sub.2 --.phi.-- (where .phi. stands for ##STR2## --C(CF.sub.3).sub.2 --.phi.'--C(CF.sub.3).sub.2 -- (where .phi.' stands for ##STR3## and --CH.sub.2 (CF.sub.2).sub.6 CH.sub.2 --; n is zero or a positive integer; and X is hydrogen or methyl group. The resin of the invention may be prepared by reacting a diglycidyl ether of a fluorine-containing hydrocarbon (R.sub.f) with acrylic acid or methacrylic acid. Further provided is an adhesive composition comprising the aforementioned fluorine-containing epoxy(meth)acrylate resin and a photo polymerization initiator, which can be cured at room temperature within a short time by irradiation with an UV ray to form a cured product having a refractive index n.sub.D.sup.20 ranging from 1.434 to 1.532. The adhesive composition of the invention has a particular utility when used to form a part or zone contacting with a quartz glass or glass fibers, since it is improved in matching of the refractive index with those of the quartz glass and optical fibers.

Fluorine-containing epoxy(meth)acrylate resin

Fluorine-containing alicyclic or aromatic cyclic compounds represented by the formula ##STR1## wherein M is a divalent organic group comprising at least one substituted or unsubstituted alicyclic hydrocarbon group or a divalent organic group comprising at least two substituted or unsubstituted aromatic hydrocarbon group, the alicyclic hydrocarbon group or aromatic hydrocarbon group may be linked by O, S or CH.sub.2, or may form a condensed ring, X is ##STR2## Y is H or CH.sub.3, n is zero or a positive number, are useful as an effective component of the adhesive composition.

A liquid crystal compound of the formula: ##STR1## wherein m and n are independently integers of 1 to 22; k and l are independently integers of 1 to 2; and C* is an asymmetric carbon atom, is chemically stable and can be applied to liquid crystal display devices operable at room temperature.

Liquid crystal compounds and intermediates thereof

The fluorine-containing epoxy(meth)acrylate resin of the invention is represented by the following general formula (I). ##STR1## wherein R.sub.f is selected from the group consisting of --.phi.--C(CF.sub.3).sub.2 --.phi.-- ##STR2## --C(CF.sub.3).sub.2 --.phi.'--C(CF.sub.3).sub.2 -- ##STR3## and --CH.sub.2 (CF.sub.2).sub.6 CH.sub.2 --; n is zero or a positive integer; and X is hydrogen or methyl group. The resin of the invention may be prepared by reacting a diglycidyl ether of a fluorine-containing hydrocarbon (R.sub.f) with acrylic acid or methacrylic acid. Further provided is an adhesive composition comprising the aforementioned fluorine-containing epoxy(meth)acrylate resin and a photo polymerization initiator, which can be cured at room temperature within a short time by irradiation with an UV ray to form a cured product having a refractive index n.sub.d.sup.20 ranging from 1.434 to 1.532. The adhesive composition of the invention has a particular utility when used to form a part or zone contacting with a quartz glass or glass fibers, since it is improved in matching of the refractive index with those of the quartz glass and optical fibers.

Fluorine-containing epoxy (meth) acrylate resin with photoinitiator

An optically active compound represented by the general formula (I) of:

Optically active compound and chiral liquid crystal composition

Growing community of inventors

Mito, Japan

Tohru Maruno