Optically diffusive plastic having high stiffness
US9897722B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2015 |
| Grant date | Feb 20, 2018 |
| Priority date | — |
| Expiry date | Jan 29, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optically diffusive plastic can comprise 40 to 94.9 mass % of a polymer resin matrix; 5 to 50 mass % of a glass filler; and 0.1 to 10 mass % of a light diffusing component; wherein the difference between refractive index of the polymer resin matrix and refractive index of the glass filler is less than or equal to 0.02; wherein a 1 millimeter (mm) thick sample of the optically diffusive plastic comprises a DLD value of greater than or equal to 1 degree (°) as measured by goniophotometry; wherein the 1 mm thick sample comprises a total transmittance of greater than or equal to 40% for incident light having a wavelength of 360 nanometers (nm) to 750 nm in air; and wherein a 3.2 mm thick sample of the optically diffusive plastic comprises a flexural modulus, measured at 23° C., of greater than or equal to 2,500 Megapascal (MPa).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.