Qianyuan 1.60 

blue block monomers

 

Methyl methacrylate (MMA) monomers have high refractive index. Lenses have high light transmittance, high hardness as well as good resistance to yellow changing, and are efficient in UV and 420nm blue-ray block.

 

Monomer Properties 

Appearance Light yellow liquid 

Viscosity (CPS/25℃ )  60± 5 

Density (g/cm3) 1.076

Refractive Index(nE25)  1.561± 0.003 

Color (APHA ) ≤ 60 

 

Lens Properties 

Refractive Index (nE25) 1.597 

Abbe Number (vE20)  34.5    

Density (g/cm3, 25 ℃)  1.18 

Volume Shrinkage (%)  7.2  

Transparency (%)  ≥ 90

420nmTransparency (%)≤ 30 

Glass Transition Temp. (℃) 105