Mitsubishi Gas Chemical Company, Inc.

Other

Takeru Horino

Toyoji Oshima

Atsuhiro Tokita

Kenji Ishii

Jun Nakano

Yasumasa Norisue

Daisuke Ohno

Makoto Miyamoto

Atsushi Hirashima

Shu Yoshida

Kazuyoshi Uera

Jiro Abe

Rintaro Takahashi

Atsushi Kimoto

A resin composition for transparent substrates comprises an epoxy resin (A) and a curing agent (B), wherein the curing agent (B) comprises a cyclohexane tricarboxylic anhydride.

Resin composition, prepreg, and film

Provided are: a method for controlling the decoloration reaction rate and color density of a fast light-modulating material to levels suitable for practical use; and a fast light-modulating material having a decoloration reaction rate and a color density which are suitable for practical use. A polymer obtained by polymerizing a paracyclophane-bridged hexaarylbisimidazole compound having a radical-polymerizable group, and a copolymer obtained by copolymerizing the compound with a (meth)acrylic acid compound or a sensitizer having a radical-polymerizable group can achieve controlled decoloration reaction rates, photosensitivity and color tones.

Photochromic material

The present invention is a photochromic material formed of a biimidazole compound represented by general formula (1-1): (where, Rand Rrespectively and independently represent a halogen atom or alkyl group, Rto Rand Rto Rrespectively and independently represent a hydrogen atom, halogen atom, alkyl group, fluoroalkyl group, hydroxyl group, alkoxyl group, amino group, alkylamino group, carbonyl group, alkylcarbonyl group, nitro group, cyano group or aryl group, Arto Arrespectively and independently represent a substituted or unsubstituted aryl group, Rmay form a condensed, substituted or unsubstituted aryl ring with R, and Rmay form a condensed, substituted or unsubstituted aryl ring with R).

A process, advantageous in producibility, for the production of a vinyl compound containing very small amounts of ionic impurities and hydrolysable halogens, which is capable of curing by means of heat and/or light and giving a cured product having excellent dielectric characteristics and heat resistance, which process can efficiently remove a generated salt and comprises reacting a non-protonic polar solvent solution of a specific bifunctional phenylene ether oligomer with a vinylbenzyl halide in the presence of an alkoxide of an alkali metal,

Process for the production of vinyl compound

A polyfunctional phenylene ether oligomer (B) having 3 to less than 9 phenolic hydroxyl groups, obtained by reacting a polyfunctional phenol (A) having 3 to less than 9 phenolic hydroxyl groups per molecule and having alkyl groups and/or alkylene groups at 2- and 6-positions of at least one of the phenolic hydroxyl groups with a monohydric phenol compound of the formula (1), derivatives thereof, resin compositions containing the derivatives, curable films obtained therefrom and cured films thereof,  wherein Rand Rare the same or different and represent a hydrogen atom, a halogen atom, an alkyl group having 6 or less carbon atoms or a phenyl group, and Rand Rare the same or different and represent a halogen atom, an alkyl group having 6 or less carbon atoms or a phenyl group.

Polyfunctional phenylene ether oligomer, derivative thereof, resin composition containing the same, and use thereof

Growing community of inventors

Tokyo, Japan

Takeru Horino