Mitsui Chemicals, Inc.

Shotaro Nakano

Kouji Suesugi

Shinsuke Ito

Yusuke Matsui

Masaru Kawaguchi

Masakazu Murakami

Shinnosuke Nakai

A method of producing a polyamine compound, the method including: a first step of generating a polyurea compound by reacting a thiourethane resin and an amine compound A with each other; and a second step of generating a polyamine compound by reacting the polyurea compound and an amine compound B with each other.

Method of producing polyamine compound and application thereof

Provided is a polythiol composition including a polythiol compound (A) and a compound represented by the following Formula (1), wherein, in high performance liquid chromatography measurement, a peak area of the compound represented by Formula (1) is 9.0 or less with respect to a total peak area 100 of all compounds contained in the polythiol composition. In Formula (1), X represents a carbon atom or a sulfur atom.

Polythiol composition, polymerizable composition, resin, molded body, optical material, and lens

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

Shotaro Nakano