Low-Viscosity Thioester Composition for High-Index Diffractive Optics

The patent changes the chemical structure parameters by introducing specific aromatic ring structures with electron-withdrawing groups (nitro, cyano, or carbonyl groups) at meta or para positions relative to the thioester group. This structural modification increases the refractive index while controlling viscosity through the specific arrangement of functional groups, achieving both high refractive index and acceptable viscosity levels.

The patent creates a composite monomer structure combining aromatic rings with electron-withdrawing groups and thioester groups in specific configurations. This composite molecular design achieves synergistic effects where the aromatic rings provide high refractive index while the thioester groups and specific substituent arrangements maintain viscosity at acceptable levels for imprinting applications.

The patent modifies the polymerizable compound by introducing specific aromatic ring structures with electron-withdrawing groups at meta or para positions. This parameter change in molecular structure enhances the refractive index while the specific structural configuration reduces resin chipping during mold release by improving the balance between crosslinking density and surface integrity.

The patent applies local quality modification by placing electron-withdrawing groups at specific positions (meta or para) relative to the thioester group on the aromatic ring. This localized structural modification optimizes the refractive index contribution while controlling the polymerization behavior to prevent resin chipping during demolding.