Mitsubishi Gas Chemical Company, Inc.

Other

Toyoji Oshima

Takeru Horino

Atsuhiro Tokita

Shu Yoshida

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).

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Tokyo, Japan

Toyoji Oshima