The method for setting polymerization conditions includes a physical property acquiring step, in which, when a composition which includes a polymerizable reactive compound including an episulfide compound, and a polymerization catalyst is heated and maintained at a predetermined temperature, a physical property value a derived from a functional group of the polymerizable reactive compound before heating and a physical property value b derived from a remaining functional group after maintaining heat for a predetermined time, are acquired; a remaining functional group ratio calculating step of calculating a remaining functional group ratio; a reaction rate coefficient calculating step for calculating a reaction rate coefficient; and a polymerization temperature calculating step of back-calculating each polymerization temperature every predetermined time in a polymerization time.

A curable composition for forming a high refractive index optical material, the curable composition including an episulfide compound, a thiol compound and an aromatic ring compound containing two or more hydroxyl groups, and an optical material including a cured product of the curable composition.

A curable composition for forming a high refractive index optical material, the curable composition including an episulfide compound, a thiol compound and an aromatic ring compound containing two or more hydroxyl groups, and an optical material including a cured product of the curable composition.

A curable composition comprising an episulfide compound represented by Chemical Formula 1 and an aromatic ring compound containing two or more hydroxyl groups represented by Chemical Formula 2 or 3, and an optical material including a cured product of the curable composition.

##STR00001##

A curable composition for forming a high refractive index optical material, the curable composition comprising an episulfide compound; sulfur-containing organic particles comprising a specific content of sulfur atoms; and a reducing agent, and an optical material comprising the curable composition.

The method of producing an optical material of the present disclosure includes a step of mixing a resin monomer for an optical material and an additive to prepare a polymerizable composition for an optical material having a hue specified by L* of 70 or more b* of from −30 to 10 in the CIE 1976 (L*, a*, b*) color space when measured at a thickness of 10 mm, and a step of polymerizing and curing the polymerizable composition for an optical material.

A composition comprising: ##STR00001##
wherein the compositional ratio of x/y ranges from about 1/99 to about 99/1, and n ranges from 1 to 1,000,000. Additionally, in this composition, R′ and R″ are independently selected from: H, unsubstituted or substituted branched alkyls with 1 to 60 carbon atoms, or unsubstituted or substituted linear alkyls with 1 to 60 carbon atoms.

A composition comprising: ##STR00001##
wherein the compositional ratio of x/y ranges from about 1/99 to about 99/1, and n ranges from 1 to 1,000,000. Additionally, in this composition, R′ and R″ are independently selected from: H, unsubstituted or substituted branched alkyls with 1 to 60 carbon atoms, or unsubstituted or substituted linear alkyls with 1 to 60 carbon atoms.

The present invention relates to [1] a polymerizable composition for optical member containing a polymerizable component and a urethaneurea compound having a structural unit derived from tolylene diisocyanate in an amount of 0.1 to 10 parts by mass based on 100 parts by mass of a total amount of the polymerizable component; [2] a production method of an optical member, including a step of injecting the polymerizable composition of [1] into a molding die, and a step of polymerizing the polymerizable composition; and [3] a spectacle lens including a spectacle lens substrate obtained by the production method of [2].

The present invention relates to [1] a polymerizable composition for optical member containing a polymerizable component and a urethaneurea compound having a structural unit derived from tolylene diisocyanate in an amount of 0.1 to 10 parts by mass based on 100 parts by mass of a total amount of the polymerizable component; [2] a production method of an optical member, including a step of injecting the polymerizable composition of [1] into a molding die, and a step of polymerizing the polymerizable composition; and [3] a spectacle lens including a spectacle lens substrate obtained by the production method of [2].