| 摘要 |
<p>According to the present invention, a resin composition having a high refractive index and low dispersion characteristics is provided. THE resin composition comprises a carbonate residue, a phosphonic acid residue represented by the following structural formula (1), and a dihydric phenol residue represented by the following structural formula (2), wherein the mol fractions of the phosphonic acid residue and the carbonate residue satisfy equation (3). <CHEM> <CHEM> ÄIn structural formula (1), R1 represents an organic group, X1 represents oxygen, sulfur or selenium, and the resin composition may contain two or more different phosphonic acid residues having different R1 or X1. In structural formula (2), R2 is independently selected from the group consisting of a hydrogen atom, a halogen atom, a hydrocarbyl group and a nitro group, and p and q are integers such that p+q=0 to 8, and the hydrocarbyl group is selected from the group consisting of an aliphatic group having 1 - 20 carbon atoms, and an aromatic group. Y1 is selected from the group consisting of a single bond, an oxygen atom, a sulfur atom, an alkylene group, an alkylidene group, a cycloalkylene group, a cycloalkylidene group, a halo-substituted alkylene group, a halo-substituted alkylidene group, a phenylalkylidene group, a carbonyl group, a sulfone group, an aliphatic phosphine oxide group, an aromatic phosphine oxide group, an alkylsilane group, a dialkylsilane group, and a fluorene group. The resin composition may contain two or more different dihydric phenol residues having different R2 or Y1.Ü <DF NUM="(3)">1 > (a)/ä(a) + (b)ü≥0.5 </DF> äIn equation (3), (a) represents the number of moles of the phosphonic acid residues, and (b) represents the number of moles of the carbonate residues.Ü</p> |
