Thermoplastic Resin Fluidity and Tensile Strength via Fluorene-Dihydroxy Composite

The patent creates a composite resin system by combining fluorene skeleton-based monomers (providing high refractive index) with specific dihydroxy compounds containing naphthyl groups (improving fluidity and tensile strength). This composite approach allows the final material to simultaneously achieve high optical performance and mechanical properties that neither component could provide alone.

The patent optimizes the molecular structure parameters of the dihydroxy compound by specifying particular naphthyl group configurations and hydroxyl group positions. By carefully adjusting these structural parameters, the resin achieves improved fluidity for injection molding while maintaining high tensile strength, resolving the contradiction between processing ease and mechanical performance.

The patent combines fluorene-based monomers (high refractive index) with specific dihydroxy compounds (improved fluidity) to create a composite resin system. The dihydroxy compound acts as a fluidity-enhancing component that enables easier injection molding while the fluorene skeleton maintains the high refractive index necessary for optical lens applications.

The patent modifies the chemical structure parameters by introducing specific dihydroxy compounds with naphthyl groups that have optimized molecular weight and functional group arrangement. These parameter changes reduce the resin's viscosity and improve fluidity for molding operations while preserving the optical properties of the fluorene skeleton.