BINAPHTHYL COMPOUNDS
Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- REUTER CHEM APP KG
- Filing Date
- 2018-08-29
- Publication Date
- 2026-04-15
AI Technical Summary
There is a need for monomers that can produce optical resins, particularly polycarbonate resins, with higher refractive indices without compromising other optical properties such as transparency, low Abbe's number, and low birefringence, and should be easy to prepare.
The use of binaphthyl compounds of formula (I) as monomers, where X is 1,2-ethandiyl and R and R' are mono- or polycyclic aryl or hetaryl groups, providing higher refractive indices and transparency, and can be easily prepared in high yields and purity.
The binaphthyl compounds of formula (I) achieve higher refractive indices and transparency in optical resins, maintaining low Abbe's number and birefringence, and can be efficiently purified to reduce haze and yellowness, suitable for optical applications.