Japan Synthetic Rubber Co., Ltd.

Desoto, Inc.

Other

Jsr Corporation

Stamicarbon B.v.

Dsm N.v.

Hodogaya Chemical Co., Ltd.

Orc Manufacturing Co., Ltd.

Katsutoshi Igarashi

Tohru Ohtaka

Timothy Edward Bishop

Kazuo Suzuki

Chander P Chawla

Hozumi Sato

Toshiyuki Ota

Takeshi Sugimoto

Tsuyoshi Watanabe

Teizo Kotani

Shuichi Matsumoto

Mitsuhito Suwa

Clive J Coady

Kozo Arai

Yoshio Matsumura

Kazuaki Okabe

Akiyoshi Fujimori

Kimiyasu Sano

Shinichirou Iwanaga

Hideki Chiba

Donald W Fieder

Keiichi Bessho

Osamu Ishikawa

Yuichi Hashiguchi

Yoshiyuki Michino

Takao Naganuma

Yoshiro Fuse

Yuzi Naito

Masanobu Takahashi

A radiation sensitive resin composition comprising:

Radiation sensitive resin composition and material for forming bumps

A liquid curable resin composition containing urethane bond at a concentration of 2.0.times.10.sup.-3 mole/gm or more and comprising: (a) a urethane (meth)acrylate having at least three cyclic structures in the molecule; (b) a polymerizable mono-functional vinyl monomer of which the homopolymer has a glass transition point of 50.degree. C. or more; and (c) a polymerization initiator. The liquid curable resin composition possesses a high Young's modulus, exhibits very little contraction stress, has high tenacity and good curing characteristics. Along with these superior characteristics, the high reliability of the composition makes it a suitable coating material for optical fiber. Furthermore, since the resin composition possesses a high Young's modulus and high tenacity, it is also useful as a protective coating material for metals, plastics, wood, ceramics, glass, and the like.

Liquid curable urethane (meth)acrylate containing resin composition

A curable liquid resin composition comprising a urethane (meth)acrylate polymer obtained by reacting:

Curable liquid resin composition

A liquid photocurable plastic composition is disclosed which comprises:

Liquid curable plastic composition

A radiation-curable coating composition adapted for the coating of optical glass fiber, comprising an ethylenically unsaturated polyurethane which is the reaction product of:

Composition for optical fiber coating comprising a polyether diol, a

A curable resin composition adapted for bundling coated optical fibers comprises:

Optical fiber bundling material and bundled optical fibers

A curing apparatus utilizing ultraviolet radiation for curing a coating over the surface of a line-shaped medium such as an optical fiber, comprising: a pair of reflecting mirrors, each of which has an elliptical mirror surface, the ratio between the major and minor axes of which is within a range from 1.02 to 1.35; a source for producing ultraviolet radiation having a tube which is disposed along a first focal axis of the pair of reflecting mirrors for emitting ultraviolet radiation and has a diameter within a range from 12 mm to 24 mm and a light emission length equal to or longer than 15 cm; and an ultraviolet radiation transmission hollow tube which is disposed along a second focal axis of the pair of reflecting mirrors and through which the line shaped medium is passed in the axial direction of the hollow tube. The ultraviolet radiation emitting tube is air-cooled. The coating is cured in a stable and efficient manner, regardless of the thickness of the coating at a high or low transportation speed of the line-shaped medium.

Curing apparatus

Polymers or copolymers of norbornene derivatives can be produced by contacting in the presence or absence of an inert solvent at least one norbornene derivative substituted by at least one polar group selected from the group consisting of ester, ether, nitrile, amide, imide, acid anhydride, halogen, and silyl, or by at least one substituent having one of said polar groups; or a combination of said norbornene derivative with at least one member selected from the group consisting of cycloalkenes having no polar substituent and polymers having olefinic carbon-to-carbon double bonds; with a catalyst consisting essentially of (a) at least one coordination compound of W or Mo, the oxidation number of which is 2, 1 or 0, (b) at least one titanium tetrahalide and, if necessary, (c) at least one compound selected from the group consisting of componds having an electron-accepting .pi. bond, N-halogen-substituted cyclic acid imides, sulfides, sulfoxides and phosphines. The above-mentioned catalyst is more active, cheaper, and easier to handle than the conventional catalysts containing organoaluminum compounds.

Method for chain-opening polymerization of norbornene derivatives

Growing community of inventors

Yokohama, Japan

Katsutoshi Igarashi