Mitsui Chemicals, Inc.

Yamamoto Chemicals, Inc.

Itoh Optical Industrial Co., Ltd.

Shinsuke Ito

Takeshi Fukuda

Satoshi Yamasaki

Masayuki Furuya

Mamoru Tanaka

Shinji Kiyono

Naoyuki Kakinuma

Takeshi Nishimura

Shigetoshi Kuma

Masaru Kawaguchi

Toshihiko Nakagawa

Hidetaka Tsukada

Nobuo Kawato

Daisuke Hasegawa

Kenichi Goto

Kouji Suesugi

Hirokazu Morita

Goro Kuwamura

Tetsuya Hamada

Toshiya Hashimoto

Tatsuya Ogawa

Daisuke Nishiguchi

Kazuhiro Kosumi

Yusuke Matsui

Shotaro Nakano

Kouju Okazaki

Nigel Ribeiro

Yuuki Kasori

Hirofumi Oda

Bunji Sawano

Ryoji Yamaguchi

Koji Suesugi

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 method for setting polymerization condition includes a physical property acquiring step of, when heating a composition including a polymerization-reactive compound and a polymerization catalyst and/or a polymerization initiator and retaining heat at a predetermined temperature, acquiring a physical property value a derived from a functional group before heating of the polymerization-reactive compound and a physical property value b derived from a remaining functional group after maintaining a temperature for a predetermined time; a remaining functional group ratio calculating step of calculating a remaining functional group ratio from the physical property value a and the physical property value b; a reaction rate coefficient calculating step of calculating a reaction rate coefficient from the remaining functional group ratio on the basis of a reaction rate equation; and a polymerization temperature calculating step of calculating a polymerization temperature on the basis of the reaction rate coefficient and conditions below.

Method for setting polymerization condition and method for manufacturing optical material

A polymerizable composition for optical materials of the present invention contains (A) a polyisocyanate compound, (B) a polythiol compound, (C) a photochromic compound, (D) a polyether compound having a number-average molecular weight of 50 to 10,000, and (E) a polyether-modified siloxane compound having a viscosity of 1 mPa·s or more and less than 1,600 mPa·s.

Polymerizable composition for optical materials and use thereof

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

A method of manufacturing an optical member by curing a thermally polymerizable composition by heating includes, in the following order: a first step of filling an inside of a mold with the thermally polymerizable composition in which the mold is configured by disposing a frame-shaped member, with a Young's modulus of 1.0 GPa or more at a polymerization initiation temperature of the thermally polymerizable composition, between two mold members facing each other; and a second step of heating the mold to the polymerization initiation temperature or more.

Method of manufacturing optical member, and optical member

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 lens ordering system includes: a computer, the computer being provided with a CPU, a storage unit, and a selection unit that is configured to be controlled by the CPU. The storage unit stores data, configured to enable determination of lens information that includes a resin material type, a pigment type, and a coating type that are used for a lens material, based on user information that includes basic information pertaining to a user, and at least one of usage information pertaining to lens usage desired by the user or psychosomatic information including psychosomatic symptoms and conditions including the eyes of the user. The selection unit determines and outputs the lens information based on the user information acquired pertaining to the user and the data stored in the storage unit.

Lens ordering system, lens ordering method, program, and data structure

An injection molding apparatus includes a substantially circular first substrate, a substantially circular second substrate disposed to face a surface of the first substrate, a fixing member which fixes a peripheral end portion of the first substrate and a peripheral end portion of the second substrate, and an injection portion which is provided in the fixing member and from which a composition is injected into a gap between the first substrate and the second substrate, in which a space connecting with the injection portion and the gap is provided in at least a part of a periphery of the gap, and a width of the space in a thickness direction is larger than a width of the gap in the thickness direction.

Injection molding apparatus, injection molding method and production method of molded product using injection molding apparatus, and laminated lens

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Omuta, Japan

Shinsuke Ito