OPTICAL DIFFUSION BLEND MATERIALS FOR LED LIGHTING

摘要

The invention relates to blend materials useful in LED lighting applications. The diffusing particle blend is a synergistic mixture of selected organic particles and selected inorganic particles of specific composition, loading, and a refractive index difference with the matrix polymer, that provide excellent light diffusion, high hiding properties and good light transmission. Articles made of this blend are useful in commercial and residential lighting, motor vehicle illumination (lights, panels), street lighting, displays and signs.

主权项

1. A translucent, light-diffusing material comprising a blend composition of
a) a thermoplastic polymer matrix material, b) from 0.01 to 20 weight percent of organic polymer diffusing particles that are refractive index (R.I.) mis-matched to the matrix polymer, wherein the absolute difference between the matrix polymer and diffusing organic polymer particles is from greater than 0.02 to 0.2, c) from 0.001 to 15 weight percent of inorganic diffusing particles, wherein said weight percents are based on the weight of the total light-diffusing composition, and wherein a sheet or film made with said light diffusing material has a luminous transmission of greater than 40%, an optical haze of greater than 90% and a diffuse light scattering of greater than 85%.