The task involves providing a low-volatile resin additive that allows for improving refractive index with minimal addition amount. The solution includes compounds such as 1,2-bis(dinaphthothien-6-ylmethoxy)ethane, bis(dinaphthothien-6-ylmethyl)succinate, bis(dinaphthothien-6-ylmethyl)terephthalate, 1,4-bis(dinaphthothien-6-ylmethoxy)benzene, 1,2-bis(2-(dinaphthothien-6-yl)ethylthio)ethane, 1,4-bis(2-(dinaphthothien-6-yl)ethylthio)benzene, and similar compounds. No specific figures are provided.
Dinaphtho[2,1-<i>b</i>:1′,2′-<i>d</i>]thiophenes as high refractive index materials exploiting the potential characteristics of “dynamic thiahelicenes”
film-forming ability, high compatibility with PMMA, and exhibition of an extra-high refractiveindex caused by dense packing in the amorphous film. Chemical modification of DNT provided new halogen-free vinyl monomers, which could be easily polymerized to form vinyl polymers with highrefractive indices of 1.72–1.74, as well as film-forming ability, highthermalstability, and high transparency in the
The task involves providing a low-volatile resin additive that allows for improving refractive index with minimal addition amount. The solution includes compounds such as 1,2-bis(dinaphthothien-6-ylmethoxy)ethane, bis(dinaphthothien-6-ylmethyl)succinate, bis(dinaphthothien-6-ylmethyl)terephthalate, 1,4-bis(dinaphthothien-6-ylmethoxy)benzene, 1,2-bis(2-(dinaphthothien-6-yl)ethylthio)ethane, 1,4-bis(2-(dinaphthothien-6-yl)ethylthio)benzene, and similar compounds. No specific figures are provided.