Jsr Corporation

Japan Fine Coatings Co. Ltd.

Dsm IP Assets B.v.

Covestro (netherlands) B.v.

Noriyasu Shinohara

Kinji Yamada

Michinori Nishikawa

Takashi Okada

Takayoshi Tanabe

Kaori Shirato

Seiichirou Takahashi

Katsuyuki Takase

Daigou Mochizuki

Takumi Nakajima

There is provided a radiation-curable resin composition for formation of a primary covering layer, the radiation-curable resin composition being able to form a cured layer having excellent flexibility and adequate mechanical strength. A radiation-curable resin composition for formation of a primary covering layer of an optical fiber, comprising a urethane oligomer, a polymerization initiator and a free-radically polymerizable non-urethane monomer, the urethane oligomer being the reaction product of a polyether-based urethane prepolymer and an isocyanate reactive compound containing one active hydrogen group, the isocyanate reactive compound containing an aliphatic alcohol and an ethylenic unsaturated group-containing isocyanate reactive compound, and the aliphatic alcohol content in the isocyanate reactive compound being 24 mol % or higher.

Radiaton curable resin composition

[Problem] To provide a radiation curable resin composition which is suitable as a primary material for optical fibers, while having a high curing rate by means of irradiation of radiation [Solution] A radiation polymerizable composition for forming an optical fiber primary coating layer, said composition containing: (A) a urethane oligomer containing a structure represented by formula (I) (in formula (I), R represents a vinyl group; and * represents a bonding hand); (B) one or more compounds selected from among (i) maleic acid anhydride, (ii) a compound represented by formula (II) (in formula (II), Rrepresents a single bond or an alkanediyl group having from 1 to 6 carbon atoms; and Rrepresents a hydrogen atom, a hydroxy group or a specific group represented by formula (II-1) or formula (II-2)), and (iii) a compound represented by formula (III) (in formula (III), Rrepresents an alkanediyl group having from 1 to 6 carbon atoms); and (C) a radiation polymerization initiator.

Radiation polymerizable composition, cured layer of same, optical fiber containing cured layer and method for producing same

The present invention aims to provide a radiation-curing liquid resin composition for optical tridimensional modeling having good storage stability. The suitable radiation-curing liquid resin composition for optical tridimensional modeling of the present invention includes a compound represented by the below general formula (1), a compound having phenolic hydroxyl group, a cationic polymerizable compound, a radical polymerization initiator, a radical polymerizable compound, one or more sulfur compound selected from the group consisting of 2-mercaptobenzothiazole, 2-(4-morpholinodithiobenzothiazole, diisopropylxantogendisulfide and diphenyldisulfide, a polyether polyol compound. 

Radioactive ray-curable liquid resin composition for use in optical stereolithography, and optically shaped article produced by curing the composition

A composition for film formation capable of forming a coating film excellent in low dielectric constant characteristics, cracking resistance, modulus of elasticity, and adhesion to substrates and useful as an interlayer insulating film material in semiconductor devices, etc. The composition for film formation contains (A) at least one member selected from an aromatic polyarylene and an aromatic poly(arylene ether), (B) a polyvinylsiloxane, and (C) an organic solvent.

Composition for film formation and material for insulating film formation

Growing community of inventors

Tokyo, Japan

Noriyasu Shinohara