Optical material composition and optical material

A heat curable optical material composition comprising:

• (A) 100 parts by mass of a polymerizable monomer, and
• (B) 0.001 to 0.3 parts by mass of a UV absorbent having a maximum absorption wavelength of 360 nm or more and less than 380 nm and represented by the following formula (1):
• wherein R1 represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, a hydroxy group, a linear or branched mono-substituted amino group having 1 to 4 carbon atoms, a linear or branched di-substituted amino group having 1 to 4 carbon atoms, a nitro group, a carboxy group, an alkyloxycarbonyl group in which the alkyl group has 1 to 8 carbon atoms, a hydroxyalkyl group having 1 to 8 carbon atoms, an alkylcarbonyloxyalkyl group in which the alkyl groups each have 1 to 8 carbon atoms, a carboxyalkyl group in which the alkyl group has 1 to 3 carbon atoms, an alkyloxycarbonylalkyl group in which the alkyl groups have 2 to 10 carbon atoms in total, an aryl group, an acyl group, a sulfo group or a cyano group;
• R2 represents a hydroxy group, an alkoxy group having 1 to 8 carbon atoms, an alkylthio group having 1 to 8 carbon atoms, a linear or branched mono-substituted amino group having 1 to 4 carbon atoms, or a linear or branched di-substituted amino group having 1 to 4 carbon atoms;
• R3 represents a hydrogen atom, a hydroxy group, an alkyl group or alkoxy group having 1 to 8 carbon atoms, a linear or branched mono-substituted amino group having 1 to 4 carbon atoms, or a linear or branched di-substituted amino group having 1 to 4 carbon atoms;
• and R2 and R3 may crosslink to form a cyclic structure.