| abstract |
A novel polyester resin having a good balance of properties such as high refractive index, high heat resistance, and low birefringence is provided. A dicarboxylic acid component including a monocyclic aromatic dicarboxylic acid component and a dicarboxylic acid component having a fluorene skeleton, and a diol component including a compound having a 9,9-bis (hydroxy (poly) alkoxyaryl) fluorene skeleton In the polyester resin having a polymerization component as a polymerization component, the proportion of the monocyclic aromatic dicarboxylic acid component is 30 mol% or more based on the total amount of the dicarboxylic acid component, and it has a monocyclic aromatic dicarboxylic acid component and a fluorene skeleton. The ratio with the dicarboxylic acid component is the former / the latter (molar ratio) = 30/70 to 90/10. [Selection figure] None |