Method for obtaining a material comprising a liquid crystal mix with a stabilized blue phase and optical article comprising this material
US10920145B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 2016 |
| Grant date | Feb 16, 2021 |
| Priority date | — |
| Expiry date | Jul 6, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/21
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method for obtaining a material containing mesogenic compounds forming a liquid crystal mix with a stabilized blue phase. The method includes the steps of a) inducing the liquid crystal mix, contained in a chemical composition, to form the blue phase, then b) illuminating the chemical composition with a light beam of visible wavelength in order to trigger the polymerization of monomers contained in the chemical composition, to obtain the material comprising the liquid crystal mix in the blue phase stabilized by the polymerized monomers. The chemical composition contains a mesogenic system and a chemical photo-initiator system adapted to trigger the polymerization of the monomers when illuminated by the light beam of visible wavelength, in which the mesogenic system includes the mesogenic compounds forming the liquid crystal mix, a chiral dopant adapted to induce the blue phase, and a monomer mix comprising the monomers adapted to polymerize.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.