Mitsui Chemicals, Inc.

Yamamoto Chemicals, Inc.

Itoh Optical Industrial Co., Ltd.

Yusuke Matsui

Kouji Suesugi

Shinsuke Ito

Shotaro Nakano

Masayuki Furuya

Ryoji Yamaguchi

Bunji Sawano

Hirofumi Oda

Yojirou Kumagae

Daisuke Kakio

Provided is a benzotriazole compound represented by Formula (1). In Formula (1), Rto Rrepresent substituents. In Formula (1), n1 represents an integer from 0 to 4, and n2 represents an integer from 0 to 3.

Benzotriazole compound, light absorber, and resin composition

A molded product of the present invention includes a polythiourethane, in which an SH group concentration according to an IR analysis method is 0.30 wt % to 3.0 wt %.

Molded product and uses thereof

In an optical material, a transmittance curve satisfies the following characteristics (1) and (2) and a hue in the CIE 1976 (L*, a*, b*) color space satisfies the following characteristic (3),

Optical material, polymerizable composition for optical material, cured product, optical material, plastic lens, method of producing optical material, and method of using optical material

A polymerizable composition for an optical material containing two or more different monomers for an optical material, and a polymerization catalyst, in which at least one of the two or more different monomers for an optical material is an isocyanate compound containing an aromatic ring, a content of the polymerization catalyst with respect to a total of 100 parts by mass of the two or more different monomers for an optical material is from 0.010 parts by mass to 0.50 parts by mass, and the viscosity measured by a B-type viscometer at 25&#xb0; C. and 60 rpm is from 10 mPa&#xb7;s to 1,000 mPa&#xb7;s.

Polymerizable composition for optical material, polymerizable prepolymer composition for optical material, cured product, and method of producing optical material

A polymerizable composition for an optical material containing two or more different monomers for an optical material, and a polymerization catalyst, in which at least one of the two or more different monomers for an optical material is an isocyanate compound containing no aromatic rings, a content of the polymerization catalyst with respect to a total of 100 parts by mass of the two or more different monomers for an optical material is from more than 0.05 parts by mass to 2.0 parts by mass, and a viscosity measured by a B-type viscometer at 25&#xb0; C. and 60 rpm is from 10 mPa&#xb7;s to 1,000 mPa&#xb7;s.

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Omuta, Japan

Yusuke Matsui