Mitsui Chemicals, Inc.

Kouju Okazaki

Mamoru Tanaka

Naoyuki Kakinuma

Takeshi Nishimura

Shinsuke Ito

Kouji Suesugi

Motoharu Oiki

There is provided a polymerizable composition for an optical material including a polyether-modified compound having a polyether group represented by General Formula (4) below, and a polymerization reactive compound. (In General Formula (4), Rrepresents a linear or branched alkylene group having 1 to 20 carbon atoms, Rrepresents a hydrogen atom, a linear or branched alkyl group having 1 to 20 carbon atoms, a linear or branched alkenyl group having 2 to 20 carbon atoms, or a linear or branched alkynyl group having 2 to 20 carbon atoms, a plurality of present R's may be the same or different, and k is an integer equal to or more than 1.)

Polymerizable composition for optical material and optical material and plastic lens obtainable from same composition

An internal release agent includes at least one phosphodiester represented by the following general formula (1). In the formula, Rand Rindependently represent a hydrocarbon group having 1 to 30 carbon atoms, which is optionally substituted with at least one hydroxyl group, and Rrepresents an alkylene group having 2 to 4 carbon atoms. A plurality of R's may be the same as or different from each other. M represents a hydrogen atom, an ammonium ion, an alkali metal ion, or a monovalent/divalent alkali earth metal ion, and n is an integer of 1 to 60.

Internal release agent, composition including internal release agent, and process for producing a plastic lens using same composition

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Ichihara, Japan

Kouju Okazaki