Jsr Corporation

Dsm N.v.

Other

Japan Synthetic Rubber Co., Ltd.

Mitsuhito Suwa

Toru Kajita

Shin-ichiro Iwanaga

Takashi Ukachi

Zen Komiya

Haruo Iwasawa

Toshiyuki Ota

Yuji Takasugi

Masafumi Yamamoto

Hideaki Takase

Katsutoshi Igarashi

Tohru Ohtaka

Yuichi Hashiguchi

A radiation-sensitive resin composition including (A) a resin containing an alicyclic skeleton in its backbone, and (B) a radiation-sensitive acid-generating agent, is provided. This composition is excellent in transparency with respect to radiation and dry etching resistance, and can give a photoresist pattern excellent in adhesion to substrates, sensitivity, resolution, and developability.

Radiation-sensitive resin composition

A positive-tone or negative-tone radiation sensitive resin composition comprising (A) a photoacid generator represented by the following formula (1-1) or (1-2):

Radiation sensitive resin composition

A liquid curable resin composition for optical fibers comprising a polymer (a) having a number average molecular weight of 5,000 or more and containing at least two types of recurring ethylenic units, of which one type has a substituent group containing an ethylenically unsaturated group and the second type is substituted by a group &mdash;COOR,(wherein R,is a hydrogen atom or a hydrocarbon group having 1-30 carbon atoms), an aryl group, a cyano group, an alkyl group having 1-10 carbon atoms or by one or more halogen atoms.

Liquid curable resin composition for optical fibers

Provided is an optical glass fiber coating composition which when coated on an optical glass fiber and suitably cured provides a coating having the combination of properties (i) through (iv):

Optical glass fiber coating composition

A liquid curable resin composition for optical fibers comprising a polymer (a) having a number average molecular weight of 5,000 or more and derived from at least two types of recurring ethylenic units, of which one type has a substituent group containing an ethylenically unsaturated group and the second type is substituted by a group --COOR.sup.3 (wherein R.sup.3 is a hydrogen atom or a hydrocarbon group having 1-30 carbon atoms), an aryl group, a cyano group, an alkyl group having 1-10 carbon atoms or by one or more halogen atoms.

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.

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Yokkaichi, Japan

Mitsuhito Suwa